JP2021023442A - Sheet and absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a perforated sheet for taking in loose stool and an absorbent article provided with the perforated sheet for taking in loose stool, which can take in loose stool inside and hold loose stool more stably.
SOLUTION: A perforated sheet 100 for taking in loose stool includes a sheet body 10 having a plurality of through holes 21 penetrating in the thickness direction. The sheet body 10 has a partition wall 30 for partitioning the through hole 21.
[Selection diagram] Fig. 2

Description

The present invention relates to a sheet and an absorbent article comprising the sheet.

Conventionally, absorbent articles such as disposable diapers, urine pads and sanitary napkins have been known. It is known that the absorbent article includes a sheet (see Patent Document 1).

JP-A-2007-97643

One of the purposes of this case is to provide a new sheet and an absorbent article with the sheet.

Here, the perforated sheet for taking in loose stools disclosed includes a sheet body having a plurality of through holes penetrating in the thickness direction. The sheet body is characterized by having a partition wall forming the through hole.

It is preferable that the through hole has a larger depth than the hole diameter (Preferable Example 1). Further, it is preferable that the partition wall has a permeation hole that communicates with the adjacent through hole and allows moisture to permeate (Preferable Example 2). Further, it is preferable that a highly absorbent polymer is attached to the partition wall (Preferable Example 3).

Further, the absorbent article disclosed here includes the above-mentioned porous sheet for taking in loose stool and an absorber provided on one surface side of the porous sheet for taking in loose stool and containing a highly absorbent polymer. ..
Further, the absorbent article disclosed here includes the above-mentioned perforated sheet for taking in loose stool and a support sheet provided on one surface side of the perforated sheet for taking in loose stool and absorbing moisture.

According to the perforated sheet for taking in loose stool and the absorbent article provided with the perforated sheet for taking in loose stool shown in the present invention, loose stool can be taken in inside. Further, since the strength of the porous sheet for taking in loose stool is improved, loose stool can be held more stably. In Preference Example 1, loose stool can be taken in more reliably and the loose stool can be held more stably. Further, in the preferred example 2, the loose stool taken in the inside can be retained in the porous sheet for taking in loose stool by further diffusing the water taken in the porous sheet for taking in loose stool through the through hole. Further, in Preferred Example 3, the liquid component contained in loose stool can be further retained by the highly absorbent polymer.

It is a development view of the paper diaper (absorbent article) which concerns on 1st Embodiment. FIG. 1 is a cross-sectional view taken along the line II-II of FIG. FIG. 5 is a perspective view showing an example of a perforated sheet for taking in loose stool having a honeycomb pattern structure with respect to the first embodiment. FIG. 5 is a sectional view in a plan view showing an example of a perforated sheet for taking in loose stool having a honeycomb pattern structure with respect to the first embodiment. FIG. 5 is a perspective view showing an example of a perforated sheet for taking in loose stool having a corrugated pattern structure with respect to the first embodiment. It is sectional drawing in plan view which shows an example of the perforated sheet for taking in loose stool which has the structure of a corrugated pattern with respect to 1st Embodiment. It is a perspective view which shows the modification of the perforated sheet for taking in loose stools about 1st Embodiment. It is sectional drawing in plan view which shows the modification of the perforated sheet for taking in loose stool with respect to 1st Embodiment. It is sectional drawing of the paper diaper (absorbent article) which concerns on 2nd Embodiment. FIG. 2 is a perspective view showing an example of a perforated sheet for taking in loose stool having a honeycomb pattern structure with respect to the second embodiment. FIG. 2 is a sectional view in a plan view showing an example of a perforated sheet for taking in loose stool having a honeycomb pattern structure with respect to the second embodiment. FIG. 5 is a perspective view showing an example of a perforated sheet for taking in loose stool having a corrugated pattern structure with respect to the second embodiment. FIG. 2 is a sectional view in a plan view showing an example of a perforated sheet for taking in loose stool having a corrugated pattern structure with respect to the second embodiment. It is sectional drawing of the paper diaper (absorbent article) which concerns on 3rd Embodiment. FIG. 3 is a perspective view showing an example of a perforated sheet for taking in loose stool having a honeycomb pattern structure with respect to the third embodiment. FIG. 3 is a sectional view in a plan view showing an example of a perforated sheet for taking in loose stool having a honeycomb pattern structure with respect to the third embodiment. FIG. 3 is a perspective view showing an example of a perforated sheet for taking in loose stool having a corrugated pattern structure with respect to the third embodiment. FIG. 3 is a sectional view in a plan view showing an example of a perforated sheet for taking in loose stool having a corrugated pattern structure with respect to the third embodiment. It is a perspective view which shows the modification of the perforated sheet for taking in loose stools about 3rd Embodiment. It is sectional drawing in plan view which shows the modification of the perforated sheet for taking in loose stool with respect to 3rd Embodiment. It is a developed view which shows the modification of the perforated sheet for taking in loose stool. It is a developed view which shows another modification of the perforated sheet for taking in loose stool. It is a schematic block diagram of the manufacturing apparatus 401 which concerns on this embodiment. FIG. 23 is a sectional view taken along line III-III of the manufacturing apparatus 401 shown in FIG. It is a schematic block diagram in the vicinity of the thickness regulation part 422 shown in FIG. It is a top view of the nozzle part 417 shown in FIG. It is explanatory drawing about the relationship between the diameter of a molten filament and the loop diameter. It is explanatory drawing about the relationship between the temperature (or viscosity) of a molten filament and a loop diameter. It is explanatory drawing about the relationship between a take-back speed ratio and a loop pitch. It is explanatory drawing about the difference between a random loop structure and a honeycomb loop structure. It is explanatory drawing about the difference between a random loop structure and a honeycomb loop structure. It is a schematic diagram which conceptually shows a multilayer multi-row honeycomb loop structure. It is the schematic sectional drawing of the filament 3D conjugate 500 of 4th Embodiment. It is a photograph of the cross section of one example of the filament three-dimensional conjugate 500. It is a photograph which cut out the part of the honeycomb loop structure about one Example of the filament three-dimensional bond 500. It is a photograph which cut out the part of the random loop structure about one Example of the filament three-dimensional bond 500. It is a top view of the nozzle part 517 which concerns on another embodiment. It is explanatory drawing about the case where a local load is applied in a thick filament three-dimensional conjugate. It is a schematic diagram which shows an example of the perforated sheet using the filament three-dimensional conjugate of 4th Embodiment. It is a schematic diagram which shows an example of a loop diameter with respect to 5th Embodiment. It is a schematic diagram which shows an example of a loop pitch with respect to 6th Embodiment. FIG. 5 is a schematic cross-sectional view showing an example of a perforated sheet with respect to the seventh embodiment. FIG. 8 is a schematic side view showing an example of a sheet for an absorbent article with respect to the eighth embodiment. 9 is a schematic plan view showing an example of a sheet for an absorbent article according to a ninth embodiment. 9 is a schematic side view showing an example of a sheet for an absorbent article with respect to the ninth embodiment. FIG. 10 is a schematic plan view showing an example of a sheet for an absorbent article with respect to the tenth embodiment. FIG. 5 is a schematic cross-sectional view showing an example of a sheet for an absorbent article with respect to the tenth embodiment.

Hereinafter, a mode for carrying out this case will be described. The following embodiments are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in this embodiment. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed and can be combined as appropriate.

The absorbent article described in the embodiment is a hygienic product that is worn by the wearer and absorbs and retains liquid water such as urine and menstrual blood excreted by the wearer and excrement such as loose stool. These absorbent articles include absorbent articles with laminates including absorbers such as tape-type and pants-type disposable diapers (so-called "disposable diapers") and training pants, as well as urine pads, sanitary napkins, and panty liners. Absorbent articles and the like having only a laminate containing an absorber are also included. In the following embodiments, pants-type disposable diapers are illustrated as absorbent articles.

In the present embodiment, the longitudinal direction of the disposable diaper is the direction connecting the front body arranged facing the abdomen of the wearer and the back body arranged facing the back. Between these front and back bodies (center in the longitudinal direction), the inseam, which is placed in the inseam of the wearer (placed facing the crotch), is located. In addition, when the disposable diaper is worn on the wearer (hereinafter abbreviated as "wearing state"), the side facing the skin (inside) of the wearer is the skin facing surface side, and the side opposite to the skin facing surface side (outside). ) Is the non-skin facing surface side. Further, the direction connecting the skin facing surface side and the skin non-facing surface side is defined as the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the width direction. Further, the direction of the surface orthogonal to the thickness direction is defined as the surface direction. In addition, viewing from the thickness direction is defined as a plan view.

Regarding the orientation of each configuration in the disposable diaper, for example, when it is expressed along the longitudinal direction, it shall include not only parallel to the longitudinal direction but also substantially parallel to the longitudinal direction. Specifically, it is assumed that the inclination angle with respect to the longitudinal direction extends below 45 ° along the longitudinal direction. Similarly, when it is expressed along each direction such as the width direction and the thickness direction, it means that the inclination angle with respect to each direction extends at less than 45 °. In this specification, for example, the notation of the numerical range of "1 to 100" includes both the lower limit value "1" and the upper limit value "100". The same applies to the notation of other numerical ranges.

[1. Constitution]
[First Embodiment]
The configurations of the perforated sheet 100 for taking in loose stool and the disposable diaper 300 according to the first embodiment will be described with reference to FIGS. 1 to 6. In the cross-sectional view of FIG. 2, the thickness of each sheet is exaggerated in order to make it easier to grasp each configuration.

In FIG. 1, the disposable diapers 300 are formed symmetrically with respect to the center line A in the width direction. The disposable diaper 300 is roughly divided into three regions along the longitudinal direction: a front body 300A, an inseam 300B, and a back body 300C. The inseam 300B is an area of the paper diaper 300 that is located in the inseam of the wearer when worn.

The disposable diaper 300 includes an absorbent laminate (hereinafter, also referred to as “laminate”) 200 at the crotch portion 300B. As shown in FIG. 2, the laminated body 200 includes a perforated sheet for taking in loose stool (hereinafter, also referred to as “perforated sheet”) 100. Further, the laminated body 200 includes an absorber 40 provided on the end surface 10b side, which is one main surface of the porous sheet 100. Further, the laminated body 200 includes a top sheet 51 provided on the end surface 10a side, which is the other main surface of the porous sheet 100. Further, the laminated body 200 includes a back sheet 55 provided on the surface of the absorber 40 opposite to the surface on which the porous sheet 100 is provided. That is, the laminated body 200 is a mat-like laminated structure in which the top sheet 51, the porous sheet 100, the absorber 40, and the back sheet 55 are laminated at least in this order.

Here, in the present specification, the term provided on the surface of the porous sheet 100 is not limited to a mode in which the absorber 40 or the top sheet 51 is directly placed on the surface of the porous sheet 100, and is optional between the porous sheet 100 and the porous sheet 100. It is meant to include an aspect in which a layer (for example, an adhesive layer) is interposed. Similarly, being provided on the surface of the absorber 40 means that not only the perforated sheet 100 or the back sheet 55 is directly placed on the surface of the absorber 40, but also an arbitrary layer is interposed between the absorber 40 and the surface of the absorber 40. It is a meaning that includes the above-mentioned aspects. Further, the laminated structure in which the top sheet 51, the porous sheet 100, the absorber 40, and the back sheet 55 are laminated at least in this order is not limited to a structure in which only each layer is directly laminated, and an arbitrary layer is provided between each layer. It means to include the provided structure. However, from the viewpoint of facilitating the distribution of solid components or liquid components between the porous sheet 100 and the absorber 40 and the top sheet 51, between the porous sheet 100 and the absorber 40 and the top sheet 51. It is preferable not to have other layers. Alternatively, when an adhesive layer is provided between the porous sheet 100 and the absorber 40 and the top sheet 51, the area of the adhesive layer is required to maintain the adhesion between the layers so as not to interfere with the flow of solid components or water. It is preferably suppressed to a certain extent. In the present specification, the solid component refers to a component other than a liquid, for example, digested or undigested food waste, cells in the body such as the small intestine and large intestine or their carcasses, intestinal cells such as Escherichia coli or their carcasses. Etc. are included in the flight. Further, the solid component is a concept including not only a solid solid substance but also a semi-solid object containing a solid and a liquid and exhibiting plasticity or fluidity.
Hereinafter, each component of the perforated sheet 100, the laminated body 200, and the disposable diaper 300 will be described.

[Perforated sheet]
The perforated sheet 100 is a sheet-like member that takes in loose stools therein and prevents the loose stools from diffusing in the lateral direction (plane direction). Since the perforated sheet 100 is mainly used for taking in loose stools, it can be positioned as a perforated sheet for taking in loose stools.

<Basic configuration of perforated sheet>
As shown in FIGS. 1 and 2, the perforated sheet 100 includes a sheet body 10. The sheet body 10 has a plurality of through holes 21 penetrating in the thickness direction from one end surface 10a (the other surface) facing each other to the other end surface 10b (one surface). The through hole 21 may be such that at least one end thereof is open at the end face 10a and the other end is open at the end face 10b. For example, the through holes 21 may extend diagonally with respect to the thickness direction, may be bent inside the sheet body 10, may be branched inside the sheet body 10, and may have a plurality of through holes. 21 may be merged. However, from the viewpoint of taking loose stool into the through hole 21 and rapidly flowing out the liquid component contained in the loose stool, the through hole 21 is preferably formed in a straight line. Further, it is preferable that the axial direction of the through hole 21 connecting the opening on the end surface 10a side of the through hole 21 and the opening on the end surface 10b side coincides with the thickness direction of the sheet body 10. Such a through hole 21 is also preferable from the viewpoint that it can be mass-produced by a known manufacturing method described later.

The sheet body 10 has a partition wall 30 for partitioning the through hole 21. The partition wall 30 is a structural member for forming a plurality of through holes 21 inside the sheet body 10 in a plan view. That is, each through hole 21 is separated and partitioned by a partition wall 30.
In the present embodiment, the partition wall 30 is a plate-shaped member extending in the thickness direction of the sheet body 10, and forms cells 11a and 11b which are structural units surrounding the through hole 21 (FIGS. 3 to 3). 6). Then, a plurality of the cells 11a and 11b are assembled in the surface direction of the sheet body 10 to form the porous sheet 100. Alternatively, the porous sheet 100 is porous in which a plurality of through holes 21 penetrating the flat plate-shaped or block-shaped sheet body 10 in the thickness direction are formed, and the through holes 21 are separated by a partition wall 30 which is a residual portion. It can also be called a body. When the perforated sheet 100 is provided with the through hole 21 and the partition wall 30, loose stool can be taken into the inside of the perforated sheet 100, and the strength in the thickness direction can be maintained. In the present specification, the plate shape is not limited to the thickness of the member, and is a concept including, for example, a film shape, a sheet shape, a block shape, and the like. Further, the thickness of the partition wall 30 may be uniform, or may be non-uniform and variable.

The shape of the perforated sheet 100 is not particularly limited as long as it has a size and shape that allows the loose stool excreted by the wearer to be taken in. In the present embodiment, the case where the perforated sheet 100 has an hourglass shape in a plan view having substantially the same shape as the absorber 40 described later is illustrated. As described above, since the porous sheet 100 has substantially the same shape as the absorber 40, the porous sheet 100 can cover the region including the front body 300A, the inseam 300B, and the back body 300C. Then, the perforated sheet 100 can prevent the excrement from leaking from the disposable diaper 300 by receiving the excrement excreted in these regions. Further, since the porous sheet 100 is provided on the absorber 40, when the porous sheet 100 takes in loose stool from one end surface 10a side of the through hole 21, the absorber 40 exists on the other end surface 10b side. It will be. Therefore, the absorber 40 acts as a stopper on the end face 10b side, and prevents loose stool taken into the through hole 21 from passing through the perforated sheet 100 by flowing out of the end face 10b as it is through the through hole 21. it can. Then, the absorber 40 can absorb the liquid component contained in the loose stool taken into the inside of the through hole 21 through the end face 10b while retaining the solid component of the loose stool inside the through hole 21. However, the plan view shape of the perforated sheet 100 is not limited to the hourglass shape, and may be, for example, a circular shape, an elliptical shape, an oval shape, a rectangular shape, or the like in a plan view. In order for the absorber 40 to act as a stopper on the end face 10b side and absorb the liquid component through the end face 10b, the porous sheet 100 preferably has a smaller shape than the absorber 40. Further, the perforated sheet 100 is preferably arranged at least at the position of the wearer's anus.

As will be described later, the perforated sheet 100 can be manufactured by cutting a partition wall 30 that is long in the thickness direction so that the depth of the through hole 21 becomes a desired length. At this time, the end portion of the partition wall 30 located on the end surface 10a of the sheet body 10 is preferably chamfered such as a flat surface or a round surface, and more preferably the round surface is chamfered. If the end portion of the partition wall 30 is not chamfered while being cut, there is a risk of causing discomfort to the wearer when the porous sheet 100 comes into contact with the wearer's skin surface. By chamfering the partition wall 30, it is possible to reduce or eliminate the discomfort that may occur during such wearing. The chamfering of the partition wall 30 can be performed, for example, by subjecting the end portion of the partition wall 30 to a cutting treatment, a polishing treatment, a heat treatment, a flame radiation treatment, an ultrasonic treatment, or the like. Since it may be difficult to visually distinguish between the end face 10a and the end face 10b of the sheet body 10, the ends on both sides of the end face 10a and the end face 10b are chamfered from the viewpoint of saving the trouble of distinguishing. You may.

<Transparent hole>
The perforated sheet 100 may have a through hole (not shown) penetrating the partition wall 30 on the side surface portion of the partition wall 30. By having the permeation holes, the liquid component contained in the loose stool taken into the inside of the porous sheet 100 can permeate through the partition wall 30 through the permeation holes. As a result, the liquid component contained in the loose stool spreads in the adjacent through hole 21 and diffuses in the porous sheet 100. Then, the absorber 40 absorbs the diffused liquid component, so that the liquid component can be quickly absorbed in a wider area. On the other hand, from the viewpoint of increasing the strength of the porous sheet 100, it is preferable that the porous sheet 100 does not have a through hole in the partition wall 30. That is, it is preferable that the partition wall 30 is continuously extended from the end face 10a to the end face 10b without interruption of the wall surface. In this case, the load applied to the partition wall 30 can be supported by the entire wall surface of the partition wall 30, and the strength of the porous sheet 100 can be improved.

<Material of perforated sheet>
Examples of the material constituting the porous sheet 100 include paper, synthetic paper, synthetic resin, non-woven fabric and the like. Among these, paper, synthetic paper, and synthetic resin are preferable from the viewpoint of hindering the permeation of strength and loose stool, synthetic paper and synthetic resin are more preferable from the viewpoint of water resistance, and synthetic resin is more preferable from the viewpoint of cost and productivity. More preferred. However, the water resistance of paper can be improved by adhering or impregnating the paper with a resin.

As the paper, one containing pulp as a main component is used. The raw material of the pulp is not particularly limited, and examples thereof include wood pulps such as softwood and hardwood; non-wood pulps such as kenaf, hemp, bamboo and straw; and raw material pulps such as used paper pulp. Further, the method for producing pulp is not particularly limited, and for example, chemical pulp such as kraft pulp (KP) and sulfate pulp (SP); crushed wood pulp (GP), refiner ground pulp (RGP), thermomechanical pulp (TMP) and the like. Mechanical pulp and the like can be used. One of these pulps may be used alone, or two or more of these pulps may be used in combination. Further, from the viewpoint of obtaining desired strength, the paper has a basis weight of usually 50 g / m ² or more, preferably 100 g / m ² or more, more preferably 150 g / m ² or more, and usually 400 g / m. ² or less, preferably 300 g / ^{m 2} or less, more preferably 200 g / ^{m 2} or less of the paper used.

The synthetic resin is not particularly limited, and for example, polyester resins such as polyethylene terephthalate and polytrimethylene terephthalate; polyolefin resins such as polyethylene and polypropylene; polyamide resins such as nylon-6 and nylon-6,6, etc. Thermoplastic resin can be used. One of these thermoplastic resins may be used alone, or two or more thereof may be used in combination.
As the synthetic paper, those produced by using the above-mentioned synthetic resin as a raw material, for example, by an internal paper making method, a surface coating method, a surface treatment method, or the like can be used.

As the non-woven fabric, a non-woven fabric produced by using the above-mentioned synthetic resin as a raw material by a thermal bond method, a spun bond method, a needle punch method, a spun lace method, an air through method, a melt blown method or the like can be used. From the viewpoint of preventing loose stool from entering and permeating through the gaps between the fibers of the partition wall 30 made of the non-woven fabric, the basis weight of the non-woven fabric is preferably 50 g / m ² or more, more preferably 100 g / m ² or more, still more preferably 150 g. / M ² or more. The upper limit of the basis weight is not particularly limited, but if the basis weight is too large, the thickness of the partition wall tends to increase and the volume of the through hole 21 tends to decrease, so that the amount is preferably ^{1000 g / m 2 or less.}

As the paper and non-woven fabric, those impregnated with a resin may be used from the viewpoint of improving the strength, water resistance, and the impermeability that hinders the permeation of loose stool. At this time, the resin to be adhered or impregnated is not particularly limited, but for example, the above-mentioned thermoplastic resin can be used. Alternatively, a thermosetting resin may be used. When the resin is attached or impregnated to the non-woven fabric, a non-woven fabric having a basis weight of ^{less than 50 g / m 2} may be used in order to improve the impermeability of loose stool. In this case, the basis weight of the non-woven fabric is preferably 20 g / m ² or more, more preferably 30 g / m ² or more, and further preferably 40 g / m ² or more.

<Ratio of depth to hole diameter>
The through hole 21 has a larger depth than the hole diameter. That is, the through hole 21 has a depth ratio (aspect ratio) with respect to the hole diameter of more than 1. The ratio of the depth of the through hole 21 to the hole diameter is usually larger than 1, preferably 1.3 or more, more preferably 1.6 or more, still more preferably 2 or more, and particularly preferably 2.5 or more. It is usually 8 or less, preferably 6 or less, more preferably 5 or less, still more preferably 4 or less. When the ratio of the depth to the hole diameter is at least the above lower limit value, the length in the thickness direction tends to increase, and it is easy to secure a volume for storing loose stool inside the through hole 21. When the ratio of the depth to the pore diameter is less than the above lower limit value, the pore diameter becomes larger with respect to the depth, so that the action due to the capillary phenomenon is weakened, and loose stool may easily fall out from the through hole 21. .. When the ratio of the depth to the pore diameter is not more than the above upper limit value, it is easy to prevent the perforated sheet 100 from being deformed by being broken in the middle when a load is applied. In addition, the hole diameter tends to be relatively large, and loose stool can be easily taken into the through hole 21 quickly.

<Thickness>
The thickness of the partition wall 30 is not particularly limited, but is usually 50 μm or more, preferably 100 μm or more, more preferably 150 μm or more, and usually 400 μm or less, preferably 300 μm or less, more preferably 200 μm or less. When the thickness of the partition wall 30 is at least the above lower limit value, the strength of the porous sheet 100 can be easily improved. When the thickness of the partition wall 30 is not more than the above upper limit value, it is easy to suppress the increase in the weight of the porous sheet 100 and secure the volume of the through hole 21.

<Height>
The height of the partition wall 30 is not particularly limited, but is usually 2 mm or more, preferably 5 mm or more, more preferably 10 mm or more, still more preferably 15 mm or more, and usually 40 mm or less, preferably 30 mm or less, more preferably 25 mm or less. , More preferably 20 mm or less. When the height of the partition wall 30 is at least the above lower limit value, it is easy to secure a volume for accommodating loose stool inside the porous sheet 100. When the height of the partition wall 30 is not more than the above upper limit value, it is easy to prevent the partition wall 30 from being deformed by breaking the through hole 21 from the middle when a load is applied from the outside. In addition, the ease of bending of the entire perforated sheet 100 in the thickness direction is relatively improved, and the processability and the fit when worn tend to be improved.

The height of the partition wall 30 is usually substantially equal to the height in the thickness direction of the porous sheet 100, that is, the thickness of the porous sheet 100. Further, the height of the partition wall 30 is usually substantially equal to the depth of the through hole 21. That is, the thickness of the perforated sheet 100 is not particularly limited, but is usually 2 mm or more, preferably 5 mm or more, more preferably 10 mm or more, still more preferably 15 mm or more, and usually 40 mm or less, preferably 30 mm or less, more preferably. It is 25 mm or less, more preferably 20 mm or less. The depth of the through hole 21 is not particularly limited, but is usually 2 mm or more, preferably 5 mm or more, more preferably 10 mm or more, still more preferably 15 mm or more, and usually 40 mm or less, preferably 30 mm or less, more preferably. Is 25 mm or less, more preferably 20 mm or less.

<Hole diameter>
The hole diameter of the through hole 21 is not particularly limited, but is usually 0.5 mm or more, preferably 1 mm or more, more preferably 1.5 mm or more, still more preferably 2 mm or more, and usually 10 mm or less, preferably 8 mm or less. It is preferably 6 mm or less, more preferably 5 mm or less, and particularly preferably 4 mm or less. When the hole diameter of the through hole 21 is at least the above lower limit value, it is easy to secure a volume for accommodating loose stool inside the porous sheet 100. In addition, it is easy to quickly take loose stool into the through hole 21. When the hole diameter of the through hole 21 is not more than the above upper limit value, it is easy to suppress a decrease in the strength of the porous sheet 100 and prevent deformation when an external force is applied. Further, the action of the capillary phenomenon makes it easy to hold loose stool in the through hole 21.

<Compression strength>
The perforated sheet 100 preferably has high compression strength (compression strength) in order to prevent deformation due to a force applied by the wearer. For example, when the wearer wearing the absorbent article 300 provided with the perforated sheet 100 sits on the perforated sheet 100 by laying it on the lower part of the buttocks or takes a posture of lying on his / her back, the perforated sheet 100 is used. The load applied by the wearer may increase in the thickness direction. Therefore, in the present specification, the compression strength of the porous sheet 100 with respect to compression means the compression strength in the thickness direction. The compressive strength refers to the maximum stress when buckling deformation occurs in the porous sheet 100 or the porous sheet 100 is broken with respect to a compressive load applied in the thickness direction of the porous sheet 100. The compressive strength is represented by a value obtained by dividing the maximum compressive load applied to the test piece of the porous sheet 100 by the cross-sectional area of the test piece. Specifically, in the present specification, the compressive strength is a value measured under the conditions described in Examples described later. The compressive strength of the porous sheet 100 is preferably 10 kPa or more, more preferably 20 kPa or more, further preferably 30 kPa or more, and preferably 2000 kPa or less, more preferably 1000 kPa or less, still more preferably 800 kPa or less. When the compression strength is at least the above lower limit value, the strength against compression in the thickness direction is high, so that it is less likely to be deformed when a load is applied, and loose stool is easily held inside. It is preferable that the compression strength is not more than the above upper limit value from the viewpoint of cost.

Further, the compressive strength of the porous sheet 100 can also be evaluated by the compressive strength per density. The compressive strength per density is represented by a value obtained by dividing the compressive strength of the test piece of the above-mentioned porous sheet 100 by the density of the test piece. Specifically, in the present specification, the compressive strength per density is a value measured under the conditions described in Examples described later. Compressive strength per density of the porous sheet 100 is preferably 0.5kPa / (kg / ^{m 3)} or more, more preferably 2kPa / (kg / ^{m 3)} or more, still more preferably 5kPa / (kg / ^{m 3)} or more It is preferably 100 kPa / (kg / m ³ ) or less, more preferably 80 kPa / (kg / m ³ ) or less, and further preferably 50 kPa / (kg / m ³ ) or less. When the compression strength per density is at least the above lower limit value, the strength against compression tends to be high while being lightweight. Further, in this case, the porosity occupied by the porous sheet 100 tends to be high, and it is easy to increase the amount of loose stool taken into the inside while improving the handleability of the porous sheet 100 by suppressing the weight of the porous sheet 100. It is preferable that the compression strength per density is not more than the above upper limit value from the viewpoint of cost.

<Porosity>
The porous sheet 100 preferably has a high porosity from the viewpoint of facilitating the incorporation of loose stool into the through holes 21 and increasing the compression strength per density. The porosity of the porous sheet 100 can be expressed by the ratio of the total area of the opening areas of the through holes 21 to the area of the porous sheet 100 in the plan view of the porous sheet 100. Specifically, in the present specification, the porosity is a value measured under the conditions described in Examples described later. The porosity of the porous sheet 100 is preferably 30% or more, more preferably 50% or more, further preferably 75% or more, particularly preferably 90% or more, and preferably 99% or less, more preferably 98%. Below, it is more preferably 97% or less, and particularly preferably 95% or less. When the porosity of the porous sheet 100 is at least the above lower limit value, the proportion occupied by the through hole 21 increases, so that the internal volume for taking loose stool into the through hole 21 tends to increase. In addition, the compression strength per density tends to increase. When the porosity of the porous sheet 100 is not more than the above upper limit value, it is easy to suppress a decrease in the strength of the partition wall 30.

The shapes of the through holes 21 and the partition wall 30 of the perforated sheet 100 are not particularly limited. From the viewpoint of strength and ease of manufacture, the porous sheet 100 preferably has a repeating structure in which cells 11a and 11b composed of through holes 21 and partition walls 30 appear periodically in a plan view. Specifically, it is preferable that the partition wall 30 surrounding the through hole 21 forms a circular or polygonal repeating structure, and it is more preferable that the partition wall 30 forms a polygonal honeycomb pattern structure in a plan view (FIG. FIG. 3, see FIG. 4). Alternatively, it is preferable that the partition wall 30 constitutes a corrugated pattern structure in a plan view (see FIGS. 5 and 6). These structures will be described in order. 3 to 6 and FIGS. 7 and 8 described later show a perspective view of the perforated sheet 100 (sheet body 10) and a cross-sectional view of the partition wall 30, but the perforated sheet 100 and the partition wall 30 have repeated portions. Only a part of the structure is extracted and shown.

<Honeycomb pattern structure>
As shown in FIGS. 3 and 4, in the porous sheet 100, it is preferable that the partition wall 30 has a honeycomb pattern structure in which a plurality of polygonal cells 11a having polygonal through holes 21a inside are assembled. That is, each partition wall 30 forms a honeycomb pattern structure forming a polygonal cell 11a in the cross-sectional structure. The cell 11a is composed of a through hole 21a and a plate-shaped cell wall 31 surrounding the through hole 21a. Then, the porous sheet 100 is formed by assembling the plurality of cells 11a adjacent to each other so that the adjacent cells 11a and the cell walls 31 are in contact with each other. In FIG. 4, one of the cells 11a is surrounded by a two-dot chain line.

The cross-sectional shape of the cell 11a is not particularly limited, and examples thereof include a triangular shape, a quadrangular shape, a pentagonal shape, and a hexagonal shape. Among them, a regular triangle shape, a square shape, and a regular hexagonal shape are preferable, and a regular hexagonal shape is more preferable. The cross-sectional shape of the through hole 21a inside the cell 11a is formed in the same manner as the shape of the cell 11a in accordance with the cross-sectional shape of the cell 11a. For example, when the shape of the cell 11a is a regular hexagonal shape, the shape of the through hole 21a is also a regular hexagonal shape. When the cell 11a and the through hole 21a have a regular hexagonal shape, the strength of the partition wall 30 is improved by dispersing the force applied in the surface direction, and the partition wall 30 is less likely to be deformed when an external force is applied. In the present embodiment, the case where the cell 11a and the through hole 21a have a regular hexagonal shape in a cross-sectional view is illustrated.

The partition wall 30 is formed by laminating a plurality of base material portions 32. The base material portion 32 has a concavo-convex structure in the surface direction, and the concavo-convex structure extends in the thickness direction. The adjacent base material portions 32 are in contact with each other in a positional relationship in which the convex portions face each other, and the adhesive portions 33 are formed by adhering these surfaces. Adhesion can be performed using, for example, known adhesives such as starch, hot melt type, synthetic resin emulsion type, and resin solution type.

When the partition wall 30 constitutes a honeycomb pattern structure, the hole diameter of the through hole 21a can be represented by the diameter of a circle inscribed in the cell 11a and having the maximum diameter. That is, the hole diameter of the through hole 21a means the diameter of the inscribed circle in the cross section of the through hole 21a in a plan view. As shown in FIG. 4, when the cell 11a has a regular hexagonal shape, the hole diameter of the through hole 21a is represented by _{the distance L 11 between the opposite sides of the cell 11a.} In this case, the distance L ₁₁ between the opposing sides is usually 0.1 mm or more, preferably 0.5 mm or more, more preferably 1 mm or more, still more preferably 1.5 mm or more, and particularly preferably 2 mm or more. , Usually 10 mm or less, preferably 6 mm or less, more preferably 5 mm or less, still more preferably 4 mm or less. _{The depth D 11} of the through hole 21a in the case of the honeycomb pattern structure can have a numerical range similar to the height of the partition wall 30 described above. Further, the ratio of the depth D _{11 to the distance L 11} between the opposite sides of the cell 11a can have the same numerical range as the ratio of the depth to the hole diameter of the through hole 21 described above.

<Manufacturing method when having a honeycomb pattern structure>
When the partition wall 30 constitutes the above-mentioned honeycomb pattern structure, the manufacturing method of the porous sheet 100 is not particularly limited, and a known manufacturing method of the honeycomb pattern structure can be used. For example, as the first manufacturing method, first, a flat sheet-like base material forming the partition wall 30 is formed into an uneven shape so as to form a hexagonal wall surface to obtain a base material portion 32. Next, the adhesive is applied to the protruding outside of the convex portion provided on the base material portion 32. Further, the plurality of base material portions 32 are attached so that the positions of the convex portions correspond to each other. Subsequently, the bonded base material portion 32 can be manufactured by cutting in the plane direction so that _{the depth D 11 of the through hole 21a has a desired length.}

Further, as a second manufacturing method, first, the adhesive is periodically applied to the position corresponding to the adhesive portion 33 on the flat sheet-like base material forming the partition wall 30. Next, a plurality of base materials coated with an adhesive are superposed and adhered to each other to obtain a laminate in which the base materials are laminated. Subsequently, in this state, the laminate is cut so that _{the depth D 11 of the through hole 21a has a desired length.} Further, it can be manufactured by spreading the laminate so that the space between the base materials is widened and the base materials are adhered by the adhesive portion 33 to form an uneven shape of the base material portion 32. ..
In addition, these production methods may be performed in combination. For example, a plurality of perforated sheets 100 manufactured by the second manufacturing method may be bonded together so that the positions of the convex portions correspond to each other.

<Structure of corrugated pattern>
As shown in FIGS. 5 and 6, in the porous sheet 100, it is preferable that the partition wall 30 has a corrugated pattern structure composed of repeating a corrugated flute portion 35 and a flat plate-shaped liner portion 36. The cell 11b is composed of a through hole 21b, a flute portion 35 and a liner portion 36 in contact with the flute portion 35 at the adhesive portion 37, and is composed of a plate-shaped cell wall 34 surrounding the through hole 21b. Then, the porous sheet 100 is formed by assembling the plurality of cells 11b adjacent to each other. In FIG. 6, one of the cells 11b is surrounded by a two-dot chain line.

The partition wall 30 is formed by alternately stacking a plurality of flute portions 35 and liner portions 36. At this time, the top of the waveform of the flute portion 35 is in contact with the liner portion 36 provided so as to face one side of the flute portion 35. Further, the bottom of the waveform of the flute portion 35 is in contact with the liner portion 36 provided so as to face the other side of the flute portion 35. Then, the top and bottom of the flute portion 35 are adhered to the liner portions 36 facing each other to form the adhesive portion 37. Adhesion can be performed using a known adhesive as in the case of the honeycomb pattern structure.

When the partition wall 30 constitutes the structure of the corrugated pattern, the flexibility of the perforated sheet 100 exhibits anisotropy depending on the extending direction of the liner portion 36. That is, it exhibits a characteristic that it is easier to bend along the direction orthogonal to the wall surface of the liner portion 36 (vertical direction in FIG. 6) than along the direction parallel to the wall surface of the liner portion 36 (left-right direction in FIG. 6). Therefore, the perforated sheet 100 may be arranged so that the longitudinal direction of the disposable diaper 300 and the extending direction of the liner portion 36 are orthogonal to each other. In this case, when the whole of the disposable diaper 300 is deformed so that at least one of the front body 300A and the rear body 300C stands up with the crotch portion 300B as the bottom, the perforated sheet 100 is deformed in accordance with the deformation of the paper diaper 300 in the longitudinal direction. Easy to bend. Therefore, for example, when the wearer wears the disposable diaper 300, the perforated sheet 100 is easily bent and deformed in the longitudinal direction along the shapes of the wearer's front body, inseam, and back. As a result, the fit is improved, and in the longitudinal direction of the disposable diaper 300, it becomes easy to follow the skin surface of the wearer and take in loose stool. Further, the perforated sheet 100 may be arranged so that the longitudinal direction of the disposable diaper 300 and the extending direction of the liner portion 36 are parallel to each other. In this case, the perforated sheet 100 is likely to bend in accordance with the deformation of the disposable diaper 300 in the width direction. Therefore, for example, when the wearer wears the disposable diaper 300, the perforated sheet 100 is easily bent and deformed in the width direction along the shape of the wearer's crotch and intergluteal cleft. As a result, the fit is improved, and in the width direction of the disposable diaper 300, it becomes easy to follow the skin surface of the wearer and take in loose stool.

When the partition wall 30 constitutes the structure of the corrugated pattern, the hole diameter of the through hole 21b can be represented by _{the distance L 21 of the liner portions 36, as shown in FIG.} In this case, the distance L ₂₁ of the liner portions 36 is usually 0.5 mm or more, preferably 1 mm or more, more preferably 1.5 mm or more, further preferably 2 mm or more, and usually 10 mm or less, preferably 6 mm or less. It is more preferably 5 mm or less, still more preferably 4 mm or less. _{The distance L 21} between the plurality of liner portions 36 included in the partition wall 30 may be the same or different. On the other hand, the corrugated pitch L ₂₂ of the flute portion 35 is usually 0.5 mm or more, preferably 1.5 mm or more, more preferably 2 mm or more, still more preferably 3 mm or more, and usually 20 mm or less, preferably 15 mm or less. , More preferably 10 mm or less, further preferably 8 mm or less, and particularly preferably 6 mm or less. _{The depth D 21} of the through hole 21b in the case of the corrugated pattern structure can have a numerical range similar to the height of the partition wall 30 described above. Further, the ratio of the depth D _{21 to the interval L 21} of the liner portion 36 can take the same numerical range as the ratio of the depth to the hole diameter of the through hole 21 described above.

<Manufacturing method when having a corrugated pattern structure>
When the partition wall 30 constitutes the structure of the corrugated pattern described above, the method for producing the porous sheet 100 is not particularly limited, and a known method for producing the corrugated pattern structure can be used. For example, as a third manufacturing method, first, a flat sheet-like base material forming the partition wall 30 is formed into a wavy shape to obtain a flute portion 35. Next, an adhesive is applied to the outside at the top of the corrugation of the flute portion 35. Further, the plurality of flute portions 35 and the plurality of liner portions 36 are alternately laminated. Subsequently, the flute portion 35 and the liner portion 36 that are bonded together can be manufactured by cutting in the plane direction so that _{the depth D 21 of the through hole 21b has a desired length.}

In this embodiment, the plurality of flute portions 35 are laminated so that the periods of the waveforms coincide with each other in a plan view and the tops of the waveforms appear at the same position. The positional relationship of the unit 35 is not limited to this. The positions of the waveforms of the plurality of flute portions 35 may be shifted periodically or randomly. For example, the waveforms of the flute portions 35 adjacent to each other with the liner portion 36 in between are offset by half a cycle, and the tops and bottoms of the respective waveforms may be stacked so as to face each other.

[Absorbable core]
The absorbent core 41 is a mat-like member that absorbs and holds a liquid. As shown in FIG. 2, the absorbent core 41 contains a superabsorbent polymer (SAP (Superabsorbent polymer), also referred to as a superabsorbent polymer or a superabsorbent resin) 42, and a fiber material 43. There is. The absorbent core 41 is formed by mixing the highly absorbent polymer 42 with the fiber material 43. The fiber material 43 is formed by entwining ultrafine fibers having hydrophilicity. The highly absorbent polymer 42 is usually buried and held in the fiber material 43 by being mixed with the fiber material 43. The highly absorbent polymer 42 can absorb and retain the liquid diffused by the fiber material 43.

<Highly absorbent polymer>
As the highly absorbent polymer 42, various known materials used as a material for an absorbent in an absorbent article such as a disposable diaper or a urine pad can be used. Examples of the highly absorbent polymer 42 include a starch-based polymer such as a starch-acrylic acid (salt) graft copolymer, a saponified product of a starch-acrylonitrile copolymer, and a saponified product of a starch-ethyl acrylate graft copolymer; sodium. Cellulose-based products such as cross-linked products of carboxymethyl cellulose; synthetic polymer-based products such as cross-linked products of acrylic acid (salt) polymers and polyvinyl alcohol-maleic anhydride reactants can be used. These may be used individually by 1 type, and may be used in combination of 2 or more type. The shape of the highly absorbent polymer 42 is not particularly limited, and for example, granules, powders, pellets, sol, films, fibers and the like can be used.

<Fiber material>
Examples of the fiber material 43 include cellulosic fibers such as pulp fibers, rayon fibers and cotton fibers; and synthetic fibers such as polyethylene, polypropylene and polyethylene terephthalate which have been hydrophilized. These may be used individually by 1 type, and may be used in combination of 2 or more type.

〔Absorber〕
The absorber 40 is a mat-like (or pad-like) member having a liquid-absorbing property that absorbs and retains excreted water such as urine and menstrual blood excreted from the wearer. Above all, the absorber 40 of the present embodiment can absorb the liquid component flowing out from the porous sheet 100 among the loose stools taken into the porous sheet 100. As shown in FIG. 1, the disposable diaper 300 has a built-in absorber 40 extending in the longitudinal direction over the front body 300A, the inseam 300B, and the back body 300C. Here, an hourglass-shaped absorber 40 in which the crotch portion 300B has a smaller width direction than the front body 300A and the rear body 300C is illustrated. However, the plan view shape of the absorber 40 is not limited to the hourglass shape as described above, and may be rectangular (that is, the width direction dimension is constant) in the plan view, and the circular front body 300A and back body 300C, respectively. It may be in the shape of a dumbbell that connects the two.

The absorber 40 has an absorbent core 41 and a wrap sheet 44. The absorber 40 is formed by wrapping the absorbent core 41 with a wrap sheet 44. The wrap sheet 44 covers the entire absorbent core 41 including the skin facing surface side (upper surface side in FIG. 2) and the skin non-facing surface side (lower surface side in FIG. 2) of the absorbent core 41. doing.

<Wrap sheet>
The wrap sheet 44 is a sheet-like member that covers the absorbent core 41. By covering the absorbent core 41 with the wrap sheet 44, the morphology of the absorbent core 41 is ensured.

The wrap sheet 44 can be formed of a known material used for absorbent articles. For example, paper such as tissue paper; spunbonded non-woven fabric, needle punched non-woven fabric, spunlace non-woven fabric, air-through non-woven fabric, SMS (Spunbound Meltblown Spunbound) non-woven fabric and the like can be used.

[Laminate]
In the laminated body 200, the top sheet 51 and the absorber 40 are arranged on both main surfaces of the porous sheet 100, and the back sheet is on the surface of the absorber 40 opposite to the surface on which the porous sheet 100 is provided. It is a laminated structure provided with 55. Above all, the top sheet 51 is arranged on the surface of the porous sheet 100 on the skin-facing surface side. Further, the absorber 40 and the back sheet 55 are arranged on the surface of the porous sheet 100 on the non-skin facing surface side. The top sheet 51 and the porous sheet 100, the porous sheet 100 and the absorber 40, and the absorber 40 and the back sheet 55 can be fixed by a known adhesive such as a hot melt adhesive.

<Top sheet>
The top sheet 51 is a sheet-like member arranged on the side facing the skin most in the laminated body 200. The top sheet 51 functions as a spacer provided between the wearer's skin surface and the perforated sheet 100. The top sheet 51 has a larger width direction than the porous sheet 100 and the absorber 40, and covers the porous sheet 100 and the absorber 40 from the skin facing surface side. Further, the top sheet 51 comes into contact with the wearer's skin in a state where the disposable diaper 300 is attached, and allows the excreted water to permeate and be absorbed by the absorber 40. Therefore, the top sheet 51 is made of a material having at least a part or a whole water permeability. Further, the top sheet 51 is preferably made of a highly flexible material for fit when worn. Further, in order to suppress stuffiness in the mounted state, it is preferable that the material is made of a material having breathability.

Further, as shown in FIGS. 1 and 2, the top sheet 51 has a passing portion 52. The passing portion 52 allows excrement to pass through the top sheet 51. Among the excrement, the passing portion 52 allows at least a solid component to pass through. Specifically, the stool component, which is a solid component in loose stool, can be passed through. Of course, the passing portion 52 may pass a liquid component together with a solid component contained in loose stool. That is, both stool and water may pass through.

The passing portion 52 is formed by holes, slits, etc. provided in the top sheet 51. Among these, it is preferable to provide holes from the viewpoint of easy passage of loose stool, and from the viewpoint of reducing the exposure of the porous sheet 100 and suppressing contact with the wearer's skin, it is preferable to provide slits. In the present embodiment, a case where a hole is provided as the passing portion 52 is illustrated.

The hole provided in the top sheet 51 is an opening formed by cutting out or punching the top sheet 51 and penetrating in the thickness direction. The shape of the hole of the passing portion 52 is not particularly limited, and examples thereof include a circular shape, an elliptical shape, an oval shape, a semicircular shape, a polygonal shape, and an indefinite shape.

The slit provided in the top sheet 51 is a notch provided by cutting the top sheet 51. The direction of the slit may be the longitudinal direction of the top sheet 51, the direction orthogonal to the longitudinal direction, or the direction inclined with respect to the longitudinal direction. The shape of the slit is not particularly limited, and may be linear, zigzag, or curved. The slit is closed when the disposable diaper 300 is not attached, but when the wearer attaches the disposable diaper 300, the top sheet 51 is deformed so as to be pulled in the plane direction, so that the slit expands and passes through the solid component. A space is formed for the diaper.

The size of the hole or slit provided as the passing portion 52 is not particularly limited, but is usually 0.5 cm or more, preferably 1 cm or more, more preferably 1.5 cm or more, and usually 5 cm or less, preferably 3 cm or less. More preferably, it is 2 cm or less. When the size of the holes or slits provided in the passing portion 52 is not more than the above lower limit value, the solid component contained in the excrement can easily pass through. When the size of the holes or slits provided in the passing portion 52 is not more than the above upper limit value, it is easy to suppress a decrease in the strength of the top sheet 51, and the wearer's skin and the perforated sheet 100 come into contact with each other through the passing portion 52. It is easy to suppress the deterioration of the touch due to this.

In the present embodiment, the passing portion 52 is arranged over the entire top sheet 51. The passage portion 52 is preferably arranged at least at the position of the wearer's anus or its periphery on the top sheet 51. As a result, loose stool excreted from the anus easily passes through the top sheet 51. Further, it is preferable that the passing portion 52 is provided so as to avoid the peripheral portion near the outer periphery of the top sheet 51. In other words, the passing portion 52 is preferably provided at the central portion or the periphery of the central portion of the top sheet 51. As a result, it is possible to prevent the stool that has passed through the top sheet 51 from leaking from the outer edge portion of the porous sheet 100 without being taken into the porous sheet 100.

As the material constituting the top sheet 51, for example, a woven fabric, a non-woven fabric, a porous film or the like can be used. Alternatively, as the top sheet 51, a non-woven fabric may be used by subjecting fibers of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon to a hydrophilic treatment. As the non-woven fabric constituting the top sheet 51, spunbonded non-woven fabric, needle punched non-woven fabric, spunlace non-woven fabric, air-through non-woven fabric, melt blown non-woven fabric, SMS non-woven fabric and the like can be used.

<Back sheet>
The back sheet 55 is a sheet-like member arranged on the side of the laminated body 200 on the non-skin facing surface side. The back sheet 55 is arranged on the non-skin facing surface side with respect to the absorber 40 to prevent excrement from leaking from the absorbent body 40 to the non-skin facing surface side. Therefore, the back sheet 55 is made of a non-permeable material. Further, the back sheet 55 is preferably made of a material having moisture permeability in order to suppress stuffiness in the mounted state.

As the material constituting the back sheet 55, for example, a thermoplastic resin sheet such as polyethylene or polypropylene can be used. Above all, as the back sheet 55, it is preferable to use a microporous thermoplastic resin sheet in which a plurality of fine pores of 0.1 to 0.4 μm are formed. As such a sheet, for example, a sheet obtained by kneading an inorganic filler in a thermoplastic tree resin to form a sheet and then stretching the sheet can be used.

[Side sheet, cover sheet]
The diaper 100 further includes a side sheet 61 and a cover sheet 62 that are laminated with respect to the laminated body 200. The side sheet 61 is arranged laterally in the width direction of the laminated body 200. Further, the cover sheet 62 is arranged on the non-skin facing surface side of the laminated body 200. The side sheet 61, the cover sheet 62, and the laminate 200 can be fixed with a known adhesive such as a hot melt adhesive.

<Side sheet>
The side sheet 61 is a member for forming three-dimensional gathers 71 on both sides of the laminated body 200. The side seats 61 are provided on the lateral sides of the seats 51 and 55, respectively. The side sheet 61 is laminated on the skin-facing surface side of the top sheet 51 in the width direction, and is laminated on the skin-facing surface side of the back sheet 55 in the width direction.

The side sheet 61 is preferably made of a non-permeable material in order to prevent liquid leakage in the lateral direction. As the side sheet 61, a spunbonded non-woven fabric can be used. Further, a part of the side sheet 61 is arranged on the side facing the skin most in the disposable diaper 300 (for this reason, the side sheet 61 is also referred to as a "top sheet" like the top sheet 51). As the side sheet 61 that can come into contact with the wearer in this way, a spunbonded non-woven fabric having increased flexibility by including a melt blown layer such as SMS non-woven fabric or SMMS (Spunbound Meltblown Meltblown Spunbound) non-woven fabric is used. Is preferable. Alternatively, it is preferable to use a spunbonded nonwoven fabric having improved flexibility by suppressing the fineness and basis weight of the fibers forming the spunbonded nonwoven fabric.

The "fineness" is a parameter corresponding to the fiber diameter (thickness) and the cross-sectional area of the fiber, and is represented by the weight per predetermined length. For example, the number of grams (denier) per 9000 m for one fiber is used as the "fineness".
The "Metsuke amount" is a parameter corresponding to the thickness of the sheet or the degree of lamination, and is represented by the weight per unit area. For example, the number of grams per square meter is used as the "weight".

<Cover sheet>
The cover sheet 62 is a sheet-like member that covers the laminated body 200 from the side opposite to the skin. The cover sheet 62 is arranged on the non-skin facing surface side of the disposable diaper 300 to reinforce the back sheet 55 and improve the feel (tactile feel) of the back sheet 55. Here, the cover sheet 62 is overlapped with the side sheet 61 on the side portion in the width direction of the back sheet 55. As the cover sheet 62, the first cover sheet 63, the second cover sheet 64, and the third cover sheet 65 are laminated in this order from the skin facing surface side to the skin non-facing surface side.

The first cover sheet 63 covers the absorber 40 from the non-skin facing surface side via the back sheet 55 (for this reason, the first cover sheet 63 is also referred to as a "pad cover sheet").
The front body 300A and the rear body 300C (see FIG. 1) of the second cover sheet 64 and the third cover sheet 65 are set to have larger width direction dimensions than the first cover sheet 63, and the wearer's buttocks and waist are set to be larger than those of the first cover sheet 63. , Placed around the belly, etc. The third cover sheet 65 is arranged on the side most non-facing the skin of the disposable diaper 300 (for this reason, the third cover sheet 65 is also referred to as an "outer cover sheet", and the second cover sheet 64 is an "inner cover sheet". Also called).

Examples of the material constituting the cover sheet 62 include a woven fabric and a non-woven fabric. Above all, it is preferable to use a non-woven fabric or a wet non-woven fabric made of a thermoplastic resin such as polyethylene, polypropylene or polyester. In particular, a spunbonded non-woven fabric can be preferably used as the cover sheet 62 from the viewpoint of flexibility in order to secure a tactile sensation (touch).

As shown in FIG. 1, the cover sheet 62 in the front body 300A and the cover sheet 62 in the rear body 300C have their respective widthwise edge portions 62a attached to each other (so-called “side seal”). In this way, the cover sheets 62 of the front body 300A and the back body 300C are continuously provided to form the pants-type disposable diaper 300.

〔gather〕
Next, the gather 70 of the disposable diaper 300 will be described with reference to FIGS. 1 and 2.
The gather 70 is a sheet composite having elasticity by sandwiching a stretchable member (stretchable member) such as rubber, polyurethane, or elastic film between sheets such as non-woven fabric in a stretched state and fixing it with hot melt or the like. Consists of. In this sheet composite, fine wrinkles are formed on a sheet such as a non-woven fabric due to the force (restoring force, elastic force) that the elastic member tries to return from the stretched state to the original (natural length state). Here, a thread-like rubber member (hereinafter abbreviated as "thread rubber") 80 is exemplified as the elastic member.

In this paper diaper 300, as the gather 70 formed of the thread rubber 80, three types of gathers 71, 72, 73 to which elasticity is imparted by the three types of thread rubber 81, 82, 83 are exemplified. One is a three-dimensional gather 71 (also referred to as "side gather") in which the edge portion of the side sheet 61 facing the skin is wrinkled with the first thread rubber 81. The other is the Tammy Gather 72 in which the second cover sheet 64 and the third cover sheet 65 (see FIG. 2) are wrinkled with the second thread rubber 82 (referenced only in one place). The other is a second three-dimensional gather 73 (not shown in FIG. 1) in which the edge portion in the width direction is wrinkled by the third thread rubber 83 (not shown in FIG. 1) on the non-skin facing surface side of the side sheet 61. is there.

The three-dimensional gather 71 is provided to prevent the excrement from leaking laterally in the width direction by enhancing the followability to the wearer at the periphery of the excrement portion. More specifically, as shown in FIG. 2, in the three-dimensional gather 71, the sheet portions 61a and 61b located at the inner edge portion in the width direction on the skin facing surface side of the side sheet 61 are bent and overlapped. The first thread rubber 81 extending in the longitudinal direction is surrounded by these sheet portions 61a and 61b.

The Tammy Gather 72 is provided to enhance the followability of the wearer to the buttocks and lower abdomen. More specifically, in the Tammy Gather 72, a plurality of second thread rubbers 82 extending in the width direction, such as warp threads or warp threads in a plain woven fabric, are formed on the second cover sheet 64 and the third cover sheet 65 (see FIG. 2). It is intervened in between.

The second three-dimensional gather 73 is provided at the inseam 300B in order to improve the followability. More specifically, in the second three-dimensional gather 73, the third thread rubber 83 is provided on the outer edge portion in the width direction of the side sheet 61 on the non-skin facing surface side.
In addition to or in place of the gathers 71, 72, 73 described above, leg gathers may be provided to enhance the follow-up of the wearer to the base of the leg.

[About a modified example of a porous sheet]
In the above description, a case where the perforated sheet 100 has a plate-shaped partition wall 30 forming a honeycomb pattern structure and includes a sheet body 10 in which a through hole 21a surrounded by the partition wall 30 is formed will be described as an example. did. Further, it has been explained that the structure of this honeycomb pattern is formed by a plurality of cells 11a composed of a through hole 21a and a plate-shaped cell wall 31 surrounding the through hole 21a (see FIGS. 3 and 4). .. Further, the case where the perforated sheet 100 has the partition wall 30 constituting the structure of the corrugated pattern has been described as an example. The structure of the perforated sheet 100 is not limited to this, and may be appropriately changed as long as it has a partition wall 30 for partitioning the through hole 21. For example, the partition wall 30 of the perforated sheet 100 may form a roll core pattern structure in which a plurality of flute portions having a columnar repeating structure are laminated. Alternatively, as shown in FIGS. 7 and 8, the partition wall 30 of the perforated sheet 100 surrounds the through hole 21c and the through hole 21c, and is composed of the cell wall 38 which is thicker than the plate-shaped cell wall 31 described above. A structure in which a plurality of cells 11c are assembled may be configured. In FIGS. 7 and 8, one of the cells 11c is surrounded by a two-dot chain line. This structure will be described below.

The shape of the cell 11c in the porous sheet 100 of this modification is not particularly limited, and examples thereof include a polygonal shape such as a triangular shape, a quadrangular shape, a pentagonal shape, and a hexagonal shape. Among them, a regular triangle shape, a square shape, and a regular hexagonal shape are preferable, a square shape and a regular hexagonal shape are more preferable, and a regular hexagonal shape is further preferable. When the shape of the cell 11c is a polygonal shape, a pattern structure similar to the honeycomb pattern described in the embodiment is formed. The shape of the cell 11c may be an indefinite shape. In this case, the through holes 21c can be provided at random sizes and positions.

The cross-sectional shape of the through hole 21c inside the cell 11c is not particularly limited, and examples thereof include a circular shape, an elliptical shape, an oval shape, and a polygonal shape such as a triangular shape, a quadrangular shape, a pentagonal shape, and a hexagonal shape. Be done. Of these, a circular shape, a square shape, and a regular hexagonal shape are preferable. From the viewpoint of increasing the porosity of the perforated sheet 100 and increasing the volume of the through hole 21c, it is preferable that the shape of the through hole 21c in the cross-sectional view is formed in accordance with the shape of the cell 11c in the cross-sectional view. For example, when the shape of the cell 11c is a regular hexagonal shape, the shape of the through hole 21c is also preferably a regular hexagonal shape. Alternatively, when the shape of the cell 11c is square, it is preferable that the shape of the through hole 21c is also square. On the other hand, from the viewpoint of increasing the strength of the porous sheet 100 by increasing the thickness of the partition wall 30, the cross-sectional shape of the through hole 21c may be circular. In this modification, a case where the cell 11c has a regular hexagonal shape in a cross-sectional view and the through hole 21c has a circular shape in a cross-sectional view is illustrated.

<Porosity>
The porosity of the porous sheet 100 of the modified example is preferably 50% or more, more preferably 60% or more, further preferably 70% or more, particularly preferably 75% or more, and preferably 95% or less, more preferably. It is 90% or less, more preferably 85% or less, and particularly preferably 80% or less. When the porosity of the porous sheet 100 is at least the above lower limit value, it is easy to secure an internal volume for taking loose stool into the through hole 21c. In addition, the perforated sheet 100 is easily bent and deformed. When the porosity of the porous sheet 100 is not more than the above upper limit value, the rigidity of the partition wall 30 is increased, and the strength against strain and deformation is likely to increase.

The perforated sheet 100 of the modified example has a cell wall 38 that is relatively thicker than the embodiment in which a plurality of cells 11a formed by the plate-shaped cell wall 31 described in the embodiment are assembled. It is preferable from the viewpoint of high strength against external force. On the other hand, from the viewpoint of reducing the weight of the perforated sheet 100, increasing the volume of the through hole 21, and improving the workability and fit due to the ease of bending in the thickness direction, the cell 11a composed of the plate-shaped cell wall 31 Is preferable. From the viewpoint of increasing the compression strength per density, it is preferable that a plurality of cells 11a composed of the plate-shaped cell wall 31 are assembled.

<Manufacturing method>
When the partition wall 30 constitutes the above-mentioned structure, the manufacturing method of the perforated sheet 100 of the modified example is not particularly limited, and a known manufacturing method can be used. For example, as a fourth manufacturing method, _{a block-shaped member having a thickness corresponding to the depth D 31} of the through hole 21c is cut with a drill or the like to provide the through hole 21c, punching, laser or the like. It can be manufactured by drilling a through hole 21c using the above.

Further, as a fifth manufacturing method, first, pulp, thermoplastic resin, fiber, etc., which are raw materials for paper, synthetic paper, synthetic resin, cloth, etc. constituting the partition wall 30, are made into columns corresponding to the shape of the through hole 21c. It is supplied into a mold container having a large number of protrusions inside. Next, an aggregate obtained by molding the raw material in the mold container is obtained by heat treatment, drying treatment, etc. of the mold container. Further, it can be produced by taking out the formed aggregate from the mold container _{and cutting it so that the through hole 21c depth D 31 has a desired length.}

[Second Embodiment]
Next, the configurations of the perforated sheet 100 for taking in loose stool and the disposable diaper 300 according to the second embodiment will be described with reference to FIGS. 9 to 13. The configuration of the disposable diaper 300 according to the second embodiment is the same as that of the disposable diaper 300 according to the first embodiment, except for the configuration of the porous sheet 100. Therefore, in the following description of the second embodiment, attention is focused exclusively on the different configurations of the porous sheet 100 according to the second embodiment and the porous sheet 100 according to the first embodiment, which have already been described with reference to FIGS. 1 to 8. The elements are designated by the same reference numerals as those in FIGS. 1 to 8 and the description thereof will be omitted as appropriate.

[Perforated sheet]
Similar to the first embodiment, the perforated sheet 100 according to the second embodiment is a sheet-like member that takes in loose stools therein and prevents the loose stools from diffusing in the lateral direction (plane direction), and takes in loose stools. It can be positioned as a perforated sheet for use. The configuration of the porous sheet 100 according to the second embodiment is different from that of the first embodiment mainly in that it has a through hole 22 described later, but other basic configurations are the same as those of the first embodiment. The details thereof will be omitted with reference to the description of <basic configuration of perforated sheet> relating to one embodiment.

<Transparent hole>
FIG. 9 is a cross-sectional view of the disposable diaper 300 according to the second embodiment, and is a view seen from the cross section taken along the line II-II of FIG. As shown in FIG. 9, the perforated sheet 100 has a through hole 22 on the side surface of the partition wall 30. The through hole 22 penetrates the partition wall 30 and communicates with the adjacent through hole 21, and also allows water to permeate between the adjacent through holes 21. Moisture referred to here includes, for example, liquid components contained in urine and loose stool. It is preferable that the permeation hole 22 allows at least liquid moisture to permeate. Further, the permeation hole 22 may permeate gaseous water (water vapor) in addition to liquid water. By having the permeation holes 22, the water taken into the inside of the porous sheet 100 can permeate through the partition wall 30 through the permeation holes 22. As a result, the water spreads in the adjacent through holes 21 and diffuses in the porous sheet 100. The permeation hole 22 may allow a solid component contained in loose stool to permeate in addition to water. However, such a transmission hole 22 tends to be relatively large in size and occupy a large area in the partition wall 30. In this case, the strength of the partition wall 30 may decrease. Therefore, usually, the through hole 22 may be at least permeable to moisture.

The position where the transmission hole 22 is provided is not particularly limited, but it is preferable that the transmission hole 22 is provided not in the partition wall 30 located on the outermost wall of the sheet body 10 but in the partition wall 30 located inside the sheet body 10. As a result, the moisture passes through the through holes 22 provided inside the sheet body 10, so that the moisture can be spread between the adjacent through holes 21 inside the sheet body 10. In addition, it is possible to prevent moisture from passing through the through holes 22 provided on the side surface of the sheet body 10 and flowing out from the side surface of the porous sheet 100. Therefore, the water that has flowed in from the end face 10a of the porous sheet 100 and diffused in the porous sheet 100 can be discharged from the end face 10b side of the porous sheet 100. Further, the absorbent body 40 provided on the non-skin facing surface side of the porous sheet 100 can directly absorb the moisture flowing out from the porous sheet 100 through the end surface 10b.

The shape of the transmission hole 22 is not particularly limited, and examples thereof include a circular shape, an elliptical shape, an oval shape, a semicircular shape, a polygonal shape, and an indefinite shape. Alternatively, the partition wall 30 may have a porous structure having a large number of voids communicating with the partition wall 30 inside, and these voids may function as through holes 22. Further, the number of through-holes 22 provided in the partition wall 30 is not particularly limited, and may be appropriately changed as long as it satisfies the through-hole ratio described later.

The diameter of the transmission hole 22 is not particularly limited, but is preferably 0.1 mm or more, more preferably 0.5 mm or more, preferably 3 mm or less, and more preferably 1 mm or less. When the diameter of the through hole 22 is equal to or larger than the above lower limit value, moisture can easily permeate through the through hole 22 into the partition wall 30. When the diameter of the through hole 22 is not more than the above upper limit value, it is easy to prevent a decrease in the strength of the partition wall 30. The diameter of the transmission hole 22 means the diameter of a circle (inscribed circle) inscribed in the transmission hole 22.

The degree of the transmission holes 22 provided in the partition wall 30 can be expressed by the ratio of the total area of the opening areas of the transmission holes 22 to the area of the partition wall 30 (transmission hole ratio). The permeation rate of the porous sheet 100 is preferably 10% or more, more preferably 20% or more, preferably 50% or less, and more preferably 30% or less. When the permeation hole ratio is equal to or higher than the above lower limit value, water can easily permeate through the permeation hole 22 into the partition wall 30. When the permeation hole ratio is not more than the above upper limit value, it is easy to prevent a decrease in the strength of the partition wall 30.

<Material of perforated sheet>
Examples of the material constituting the porous sheet 100 include paper, synthetic paper, synthetic resin, non-woven fabric, and the like, as in the first embodiment. Regarding preferable main components, raw materials, manufacturing methods, basis weights, basis weights, etc. of these materials, the details thereof will be omitted with reference to the description of <material for porous sheet> according to the first embodiment.

<Ratio of depth to hole diameter>
In the porous sheet 100 according to the second embodiment, the through hole 21 preferably has a larger depth than the hole diameter. That is, the through hole 21 preferably has a depth ratio (aspect ratio) with respect to the hole diameter of more than 1. Regarding the numerical range preferable as the ratio of the depth of the through hole 21 to the hole diameter, the description thereof will be omitted by referring to the description of <ratio of depth to hole diameter> regarding the first embodiment.

<Thickness, height, hole diameter>
The thickness of the partition wall 30, the height of the partition wall 30, and the hole diameter of the through hole 21 are not particularly limited, and with respect to their preferable numerical ranges, the description of <thickness> and the description of <height> regarding the first embodiment. The details will be omitted with reference to the description of <hole diameter>.

<Compression strength>
As in the first embodiment, the perforated sheet 100 preferably has a high strength against compression (compression strength) in order to prevent deformation due to a force applied by the wearer. Regarding the preferable numerical range of the compressive strength of the porous sheet 100 and the compressive strength per density thereof, the details thereof will be omitted with reference to the description of <compressive strength> according to the first embodiment.

<Porosity>
Similar to the first embodiment, the porous sheet 100 preferably has a high porosity from the viewpoint of facilitating the uptake of loose stool into the through hole 21 and increasing the compression strength per density. Regarding the preferable numerical range of the porosity of the porous sheet 100, the description of <porosity> regarding the first embodiment will be referred to and the details thereof will be omitted.

Similar to the first embodiment, the perforated sheet 100 may have a repeating structure in which cells 11a and 11b including through holes 21 and partition walls 30 appear periodically in a plan view from the viewpoint of strength and ease of manufacture. preferable. Specifically, it is preferable that the partition wall 30 surrounding the through hole 21 has a circular or polygonal repeating structure, and a honeycomb pattern structure similar to that of FIGS. 3 and 4 of the first embodiment is formed. Is more preferable (see FIGS. 10 and 11). Alternatively, it is preferable that the partition wall 30 surrounding the through hole 21 constitutes a corrugated pattern structure similar to that in FIGS. 5 and 6 of the first embodiment (see FIGS. 12 and 13). These structures will be described in order. 10 to 13 show a perspective view of the porous sheet 100 (sheet body 10) and a cross-sectional view of the partition wall 30, but only a part of the repeating structure of the porous sheet 100 and the partition wall 30. Is extracted and shown.

<Honeycomb pattern structure>
As shown in FIGS. 10 and 11, in the porous sheet 100, the partition wall 30 preferably has a honeycomb pattern structure in which a plurality of polygonal cells 11a having polygonal through holes 21a are assembled therein. Regarding the constituent elements of the honeycomb pattern structure shown in FIGS. 10 and 11, and the preferable shape of the cell 11a, the details thereof will be omitted with reference to the description of <honeycomb pattern structure> according to the first embodiment.

As shown in FIGS. 10 and 11, the partition wall 30 is formed by laminating a plurality of base material portions 32. In the second embodiment, the base material portion 32 repeats an uneven structure in which the first parallel portion 32a, the first slope portion 32b, the second parallel portion 32c, and the second slope portion 32d are continuous in this order in the plane direction. Have. The first parallel portion 32a, the first slope portion 32b, the second parallel portion 32c, and the second slope portion 32d all have substantially the same length. The first parallel portion 32a and the second parallel portion 32c are parallel to each other and also parallel to the extending direction of the base material portion 32. The first slope portion 32b, the second parallel portion 32c, and the second slope portion 32d form the shape of the sides other than the bottom of the isosceles trapezoid in which the internal angles of the bases are both 60 degrees in this order. Further, the second slope portion 32d, the first parallel portion 32a, and the first slope portion 32b form the shape of the sides other than the bottom of the isosceles trapezoid in which the internal angles of the bases are both 60 degrees in this order. Then, by repeating these shapes alternately, an uneven structure is formed. The base material portion 32 has the above-mentioned uneven structure extending in the thickness direction. Further, the adjacent base material portions 32 are in contact with each other in a positional relationship in which the first parallel portions 32a or the second parallel portions 32c, which are convex portions, face each other, and the adhesive portions 33 are formed by adhering these surfaces. Has been done. Adhesion can be performed using, for example, known adhesives such as starch, hot melt type, synthetic resin emulsion type, and resin solution type.

When the partition wall 30 constitutes a honeycomb pattern structure and the cell 11a has a regular hexagonal shape, the hole diameter of the through hole 21a is represented by _{the distance L 11 between the opposite sides of the cell 11a. The numerical range preferable as the distance L 11} between the opposite sides of the cell 11a, _{the depth D 11} of the through hole 21a, and the ratio of the depth D _{11 to the distance L 11} between the opposite sides of the cell 11a are It is the same as those relating to the first embodiment, and the details thereof will be omitted with reference to the above description.

In the second embodiment, transmission holes 22a are provided on two opposite sides of the cell 11a, which are the first parallel portion 32a and the second parallel portion 32c. Further, through holes 22b and 22c are provided on two opposite sets of sides including the first slope portion 32b and the second slope portion 32d of the cell 11a, respectively. As a result, the through holes 21a of the adjacent cells 11a and the water in the through holes 21a can be circulated through the through holes 22a to 22c. In this case, in FIG. 11, water can be circulated between the cells 11a adjacent in the vertical direction and the cells 11a adjacent in the diagonal direction in the left-right direction through the through holes 22a to 22c. In this case, the porous sheet 100 can disperse the water content in the through holes 21a in the entire porous sheet 100 in a well-balanced manner.

The transmission hole 22 is not limited to the mode in which the transmission holes 22a to 22c described with reference to FIGS. 10 and 11 are provided, and may be appropriately changed. For example, of the transmission holes 22a to 22c, only one set of the transmission holes 22 facing each other may be provided, and the other two sets may not be provided. As an example, it is possible to provide only the transmission holes 22a and not to provide the transmission holes 22b and 22c. In this case, in FIG. 11, water can be circulated between the cells 11a adjacent in the vertical direction through the through holes 22a. In this way, by providing the permeation holes 22 only in the partition walls 30 on the opposite sides between the adjacent cells 11a, it is possible to give directionality to the permeation of water. At this time, for example, the perforated sheet 100 provided with only the through holes 22a may be arranged so that the vertical direction of the perforated sheet 100 in FIG. 11 and the longitudinal direction of the disposable diaper 300 are parallel to each other. In this case, the perforated sheet 100 can guide the moisture in the through hole 21a in the longitudinal direction of the disposable diaper 300. Thereby, for example, the water taken into the porous sheet 100 near the inseam 300B can be diffused in the longitudinal direction of the front body 300A or the back body 300C.

<Manufacturing method when having a honeycomb pattern structure>
When the partition wall 30 constitutes the above-mentioned honeycomb pattern structure, the first manufacturing method or the second manufacturing method described with respect to the first embodiment may be applied as the manufacturing method of the porous sheet 100. When the first manufacturing method is applied, when the base material portion 32 formed into a concavo-convex shape is obtained, for example, the base material portion 32 is perforated by punching or a laser or the like to perform transmission holes 22a to 22c. Can be provided. When the second manufacturing method is applied, when a laminate in which base materials are laminated is obtained, for example, the base material portion 32 is cut with a drill or the like, or the base material portion 32 is punched or laser or the like. By drilling the holes, the through holes 22a to 22c can be provided.

<Structure of corrugated pattern>
As shown in FIGS. 12 and 13, in the porous sheet 100, it is preferable that the partition wall 30 has a corrugated pattern structure composed of repeating a corrugated flute portion 35 and a flat plate-shaped liner portion 36. The cell 11b is composed of a through hole 21b, a flute portion 35 and a liner portion 36 in contact with the flute portion 35 at the adhesive portion 37, and is composed of a plate-shaped cell wall 34 surrounding the through hole 21b. Then, the porous sheet 100 is formed by assembling the plurality of cells 11b adjacent to each other. In FIG. 13, one of the cells 11b is surrounded by a two-dot chain line.

The partition wall 30 is formed by alternately stacking a plurality of flute portions 35 and liner portions 36. The flute portion 35 repeatedly has a corrugated structure in which the top portion 35a, the first intermediate portion 35b, the bottom portion 35c, and the second intermediate portion 35d are continuous in this order in the plane direction. The flute portion 35 has this corrugated structure extending in the thickness direction. The liner portion 36 is a flat plate-shaped member. At this time, the top portion 35a of the waveform of the flute portion 35 is in contact with the liner portion 36 provided so as to face one side of the flute portion 35. Further, the bottom portion 35c of the waveform of the flute portion 35 is in contact with the liner portion 36 provided so as to face the other side of the flute portion 35. Then, the top portion 35a and the bottom portion 35c of the flute portion 35 are adhered to the liner portions 36 facing each other to form the adhesive portion 37. Adhesion can be performed using a known adhesive as in the case of the honeycomb pattern structure.

When the partition wall 30 constitutes the structure of the corrugated pattern, the flexibility of the perforated sheet 100 exhibits anisotropy depending on the extending direction of the liner portion 36. The relationship between the flexibility of the perforated sheet 100 and the extending direction of the liner portion 36 is the same as that of the first embodiment, and the details thereof will be omitted by referring to the above description. ..

When the partition wall 30 constitutes the structure of the corrugated pattern, the hole diameter of the through hole 21b can be represented by _{the distance L 21 of the liner portions 36, as shown in FIG.} In this case, a preferable range as the interval L ₂₁ of the liner portion 36, the pitch L ₂₂ of the waveform of the flute section 35, through the depth D ₂₁ of the hole 21b, the depth D ₂₁ relative to distance L ₂₁ of the liner portion 36 The ratios are the same as those for the first embodiment, and the details thereof will be omitted with reference to the above description.

In the second embodiment, in the flute portion 35 of the cell 11b, a transmission hole 22d is provided in the first intermediate portion 35b, and a transmission hole 22e is provided in the second intermediate portion 35d. Further, a transmission hole 22f is provided in the liner portion 36 of the cell 11b. As a result, the through holes 21b of the adjacent cells 11b and the water in the through holes 21b can be circulated through the through holes 22d to f. In this case, in FIG. 13, water can be circulated between the cells 11b adjacent in the vertically oblique direction and the cells 11b adjacent in the left-right direction through the through holes 22d to 22f. In this case, the porous sheet 100 can disperse the moisture in the through holes 21b in a well-balanced manner throughout the porous sheet 100.

The transmission hole 22 is not limited to the mode in which the transmission holes 22d to 22f described with reference to FIGS. 12 and 13 are provided, and may be appropriately changed. For example, of the transmission holes 22d to 22f, only the transmission holes 22d and 22e may be provided in the flute portion 35, and the transmission holes 22f may not be provided in the liner portion 36. In this case, in FIG. 13, water can be circulated between the cells 11b adjacent to each other in the left-right direction through the through holes 22d and 22e. In this way, by providing the through holes 22d and 22e only in the partition wall 30 constituting the flute portion 35 between the adjacent cells 11b, it is possible to give directionality to the permeation of water. At this time, for example, the perforated sheet 100 provided with only the through holes 22d and 22e may be arranged so that the left-right direction of the perforated sheet 100 in FIG. 13 and the longitudinal direction of the disposable diaper 300 are parallel to each other. In this case, the perforated sheet 100 can guide the moisture in the through hole 21b in the longitudinal direction of the disposable diaper 300. Thereby, for example, the water taken into the porous sheet 100 near the inseam 300B can be diffused in the longitudinal direction of the front body 300A or the back body 300C.

<Manufacturing method when having a corrugated pattern structure>
When the partition wall 30 constitutes the structure of the corrugated pattern described above, the third manufacturing method described with respect to the first embodiment may be applied as the manufacturing method of the porous sheet 100. When the third manufacturing method is applied, when the flat sheet-like base material forming the partition wall 30 is formed into a wavy shape to obtain the flute portion 35, for example, the flute portion 35 is formed by punching or using a laser or the like. By perforating, through holes 22d to 22f can be provided.

In this embodiment, the plurality of flute portions 35 are laminated so that the periods of the waveforms coincide with each other in a plan view and the tops of the waveforms appear at the same position. The positional relationship of the unit 35 is not limited to this. The positions of the waveforms of the plurality of flute portions 35 may be shifted periodically or randomly. For example, the waveforms of the flute portions 35 adjacent to each other with the liner portion 36 in between are offset by half a cycle, and the tops and bottoms of the respective waveforms may be stacked so as to face each other.

In the second embodiment, the absorbent core 41, the highly absorbent polymer 42, the fiber material 43, the absorbent body 40, the wrap sheet 44, the laminated body 200, the top sheet 51, the passing portion 52, and the back. Each component of the seat 55, the side sheet 61, the cover sheet 62, and the gather 70 may be configured in the same manner as the corresponding elements described in the first embodiment, and the above description may be used as a reference. Details will be omitted.

[About the hole diameter and arrangement of the through holes]
In the above description, the case where the transmission holes 22 having the same hole diameter are arranged has been described as an example. The pore diameter of the transmission hole 22 is not limited to this, and the pore diameter of the transmission hole 22 included in one porous sheet 100 may be different from each other, or the pore diameter may be changed according to the position in the porous sheet 100. Further, the arrangement of the transmission holes 22 may be non-uniform, and the distribution of the transmission holes 22 may be changed according to the position in the porous sheet 100. For example, the permeation hole ratio contained in a part of the region may be increased, or the permeation hole ratio contained in a part of the region may be decreased.

[About a modified example of a porous sheet]
In the above description, the case where the perforated sheet 100 has a plate-shaped partition wall 30 constituting the structure of the honeycomb pattern has been described as an example. Further, the case where the perforated sheet 100 has the partition wall 30 constituting the structure of the corrugated pattern has been described as an example. The structure of the perforated sheet 100 is not limited to this, and may be appropriately changed as long as it has a partition wall 30 for partitioning the through hole 21. For example, the partition wall 30 of the porous sheet 100 may have a roll core pattern structure in which a plurality of flute portions having a columnar repeating structure are laminated.

[Third Embodiment]
Next, the configurations of the perforated sheet 100 for taking in loose stool and the disposable diaper 300 according to the third embodiment will be described with reference to FIGS. 14 to 20. In the paper diaper 300 according to the first embodiment described above, the laminated body 200 includes an absorber 40 (see FIG. 1) provided on the end surface 10b side, which is the other main surface of the porous sheet 100. In the disposable diaper 300, the laminated body 200 is provided with a support sheet 54 provided on the end surface 10b side, which is the other main surface of the porous sheet 100, in place of the absorbent body 40 (see FIG. 1). Regarding the elements, since the configuration of the disposable diaper 300 according to the third embodiment is the same as that of the disposable diaper 300 according to the first embodiment except for the configuration of the porous sheet 100, the elements already described with reference to FIGS. 1 to 8 The same reference numerals as those in FIGS. 1 to 8 are assigned to the above, and the description thereof will be omitted as appropriate.

[Perforated sheet]
Similar to the first embodiment, the perforated sheet 100 according to the third embodiment is a sheet-like member that takes in loose stools therein and prevents the loose stools from diffusing in the lateral direction (plane direction), and takes in loose stools. It can be positioned as a perforated sheet for use. Further, in the third embodiment, the porous sheet 100 is a liquid-absorbent member that absorbs and retains excreted water such as urine and menstrual blood excreted from the wearer. The configuration of the porous sheet 100 of the third embodiment is different from that of the first embodiment mainly in that the partition wall 30 has the highly absorbent polymer 42, but the other basic configurations are the same as those of the first embodiment. Therefore, the description of <basic configuration of the porous sheet> relating to the first embodiment will be referred to and the details thereof will be omitted.

As shown in FIGS. 15 to 18, the partition wall 30 contains (adheres) a superabsorbent polymer 42 (also referred to as a superabsorbent polymer (SAP), a superabsorbent polymer or a highly water-absorbent resin, which will be described later. There is. The highly absorbent polymer 42 can absorb and retain the liquid taken into the porous sheet 100.

The content of the highly absorbent polymer 42 in the partition wall 30 is usually 1% by mass or more, preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass in terms of solid content with respect to the total mass of the partition wall 30. % Or more, usually 50% by mass or less, preferably 40% by mass or less, more preferably 30% by mass or less, still more preferably 20% by mass or less. When the content of the highly absorbent polymer 42 is at least the above lower limit, it is easy to prevent the liquid taken into the porous sheet 100 from leaking to the outside by absorbing and holding the liquid. When the content of the highly absorbent polymer 42 is not more than the above upper limit, it is easy to prevent the through hole 21 from being narrowed or closed during water absorption due to the excessively high absorbent polymer 42. In addition, it is easy to suppress a decrease in the strength of the partition wall 30.

The partition wall 30 may further contain a fiber material (not shown) described later. The fiber material is formed by entwining ultrafine fibers having hydrophilicity. When the partition wall 30 contains a fibrous material, the highly absorbent polymer 42 is buried and held in the fibrous material by being mixed with the fibrous material. Generally, the fibrous material has a higher absorption speed than the highly absorbent polymer 42. On the other hand, the highly absorbent polymer 42 is superior in absorbency, that is, in the amount of liquid absorbed, to the fiber material. Therefore, when the partition wall 30 contains the fiber material, the liquid can be temporarily absorbed by the partition wall 30 by the fiber material. Further, the highly absorbent polymer 42 can gradually absorb and retain the liquid absorbed by the fibrous material.

The content of the fiber material in the partition wall 30 is usually 5% by mass or more, preferably 10% by mass or more, more preferably 15% by mass or more, still more preferably 20% by mass or more in terms of solid content with respect to the total mass of the partition wall 30. It is usually 60% by mass or less, preferably 50% by mass or less, more preferably 40% by mass or less, and further preferably 30% by mass or less. When the content of the fiber material is at least the above lower limit, the liquid taken into the porous sheet 100 can be easily absorbed quickly. When the content of the fiber material is not more than the above upper limit, it is easy to prevent the through hole 21 from being narrowed or closed due to the excessive fiber material. In addition, it is easy to suppress a decrease in the strength of the partition wall 30.

The mode in which the porous sheet 100 contains the highly absorbent polymer 42 and / or the fibrous material in the partition wall 30 is not particularly limited, and for example, as shown in FIGS. 15 to 18, the highly absorbent polymer 42 is formed on the surface of the partition wall 30. Or fiber material may be attached, or the highly absorbent polymer 42 or fiber material may be present inside the partition wall 30, and both modes may be combined. In the latter case, it is preferable that the highly absorbent polymer 42 or the fiber material is present on the surface of the partition wall in a partially exposed state. In the former case, for example, after forming the sheet body 10, an adhesive is applied to the sheet body 10 and the highly absorbent polymer 42 or the fiber material is attached to the sheet body 10 with this adhesive to fix the sheet body 10. be able to. Further, in the latter case, for example, when the sheet body 10 is formed, the material of the sheet body may be mixed with the highly absorbent polymer 42 or the fiber material in advance, and the sheet body 10 may be fixed by forming the sheet body 10. it can. The adhesive used for fixing the highly absorbent polymer 42 and the fiber material is not particularly limited, and for example, known adhesives such as starch, hot melt type, synthetic resin emulsion type, and resin solution type can be used. .. Of these, a water-based adhesive in which a hydrophilic adhesive component is dissolved or dispersed in water is preferable. Examples of such an adhesive component include polyvinyl alcohol-based resins.

Further, the shape of the porous sheet 100 according to the third embodiment is not particularly limited as long as it has a size and shape that allows the loose stool excreted by the wearer to be taken in, as in the first embodiment. In the third embodiment, the perforated sheet 100 extends in the longitudinal direction over the front body 300A, the inseam 300B, and the back body 300C. Here, an hourglass-shaped perforated sheet 100 in which the crotch portion 300B has a smaller width direction than the front body 300A and the rear body 300C is illustrated. In the third embodiment, the perforated sheet 100 has substantially the same shape as the support sheet 54 described later. As described above, since the perforated sheet 100 has an hourglass shape having substantially the same shape as the support sheet 54, the perforated sheet 100 can cover the region including the front body 300A, the inseam 300B, and the back body 300C. Then, the perforated sheet 100 can prevent the excrement from leaking from the disposable diaper 300 by receiving the excrement excreted in these regions. Further, since the porous sheet 100 is provided on the support sheet 54, when the porous sheet 100 takes in loose stool from one end surface 10a side of the through hole 21, the support sheet 54 exists on the other end surface 10b side. It will be. Therefore, the support sheet 54 acts as a stopper on the end face 10b side, and prevents loose stool taken into the through hole 21 from passing through the perforated sheet 100 by flowing out of the end face 10b as it is through the through hole 21. it can. Then, the support sheet 54 can absorb the liquid component contained in the loose stool taken into the inside of the through hole 21 through the end face 10b while retaining the solid component of the loose stool inside the through hole 21. However, the plan view shape of the perforated sheet 100 is not limited to the hourglass shape, for example, a circular shape, an elliptical shape, an oval shape, a rectangular shape (that is, the width direction dimension is constant), a circular front body 300A and a back body in a plan view. It may have a dumbbell shape or the like connecting 300C. In order for the support sheet 54 to act as a stopper on the end face 10b side and absorb the liquid component through the end face 10b, the porous sheet 100 preferably has a smaller shape than the support sheet 54. Further, the perforated sheet 100 is preferably arranged at least at the position of the wearer's anus.

<Transparent hole>
Similar to the first embodiment, the perforated sheet 100 may have a through hole (not shown) penetrating the partition wall 30 on the side surface portion of the partition wall 30. In the third embodiment, the highly absorbent polymer 42 contained in the partition wall 30, here, the highly absorbent polymer 42 adhered (or adhered) to the partition wall 30 as shown in FIGS. 15 to 18, is a diffused liquid component. By absorbing the liquid component, the liquid component can be quickly absorbed in a wider area.

<Material of perforated sheet>
Examples of the material constituting the porous sheet 100 include paper, synthetic paper, synthetic resin, non-woven fabric and the like. Regarding preferable main components, raw materials, manufacturing methods, basis weights, basis weights, etc. of these materials, the details thereof will be omitted with reference to the description of <material for porous sheet> according to the first embodiment.

<Highly absorbent polymer>
As the highly absorbent polymer 42, various known materials used as a material for an absorbent in an absorbent article such as a disposable diaper or a urine pad can be used. Examples of the highly absorbent polymer 42 include a starch-based polymer such as a starch-acrylic acid (salt) graft copolymer, a saponified product of a starch-acrylonitrile copolymer, and a saponified product of a starch-ethyl acrylate graft copolymer; sodium. Cellulose-based products such as cross-linked products of carboxymethyl cellulose; synthetic polymer-based products such as cross-linked products of acrylic acid (salt) polymers and polyvinyl alcohol-maleic anhydride reactants can be used. These may be used individually by 1 type, and may be used in combination of 2 or more type. The shape of the highly absorbent polymer 42 is not particularly limited, and for example, granules, powders, pellets, sol, films, fibers and the like can be used.

<Fiber material>
Examples of the fiber material include cellulosic fibers such as pulp fibers, rayon fibers and cotton fibers; and synthetic fibers such as polyethylene, polypropylene and polyethylene terephthalate which have been hydrophilized. These may be used individually by 1 type, and may be used in combination of 2 or more type.

<Ratio of depth to hole diameter>
In the porous sheet 100 according to the third embodiment, the through hole 21 preferably has a larger depth than the hole diameter. That is, the through hole 21 preferably has a depth ratio (aspect ratio) with respect to the hole diameter of more than 1. Regarding the numerical range preferable as the ratio of the depth of the through hole 21 to the hole diameter, the description thereof will be omitted by referring to the description of <ratio of depth to hole diameter> regarding the first embodiment.

<Thickness, height, hole diameter>
The thickness of the partition wall 30, the height of the partition wall 30, and the hole diameter of the through hole 21 are not particularly limited, and with respect to their preferable numerical ranges, the description of <thickness> and the description of <height> regarding the first embodiment. The details will be omitted with reference to the description of <hole diameter>.

<Compression strength>
Similar to the first embodiment, the perforated sheet 100 according to the third embodiment preferably has a high strength against compression (compression strength) in order to prevent deformation due to a force applied by the wearer. Regarding the preferable numerical range of the compressive strength of the porous sheet 100 and the compressive strength per density thereof, the details thereof will be omitted with reference to the description of <compressive strength> according to the first embodiment.

<Porosity>
Similar to the first embodiment, the porous sheet 100 according to the third embodiment preferably has a high porosity from the viewpoint of facilitating the uptake of loose stool into the through holes 21 and increasing the compression strength per density. Regarding the preferable numerical range of the porosity of the porous sheet 100, the description of <porosity> regarding the first embodiment will be referred to and the details thereof will be omitted.

Similar to the first embodiment, the perforated sheet 100 may have a repeating structure in which cells 11a and 11b including through holes 21 and partition walls 30 appear periodically in a plan view from the viewpoint of strength and ease of manufacture. preferable. Specifically, it is preferable that the partition wall 30 surrounding the through hole 21 has a circular or polygonal repeating structure, and a honeycomb pattern structure similar to that of FIGS. 3 and 4 of the first embodiment is formed. Is more preferable (see FIGS. 15 and 16). Alternatively, it is preferable that the partition wall 30 surrounding the through hole 21 constitutes a corrugated pattern structure similar to that in FIGS. 5 and 6 of the first embodiment (see FIGS. 17 and 18). These structures will be described in order. 15 to 18 show a perspective view of the porous sheet 100 (sheet body 10) and a cross-sectional view of the partition wall 30, but only a part of the repeating structure of the porous sheet 100 and the partition wall 30. Is extracted and shown. In the third embodiment, the case where the highly absorbent polymer 42 is attached to the surface of the partition wall 30 is illustrated.

<Honeycomb pattern structure>
As shown in FIGS. 15 and 16, in the porous sheet 100, it is preferable that the partition wall 30 has a honeycomb pattern structure in which a plurality of polygonal cells 11a having polygonal through holes 21a inside are assembled. Regarding the constituent elements of the honeycomb pattern structure shown in FIGS. 15 and 16 and the preferable shape of the cell 11a, the details thereof will be omitted with reference to the description of <honeycomb pattern structure> according to the first embodiment. _{Further, the numerical range preferable as the distance L 11} between the opposite sides of the cell 11a, _{the depth D 11} of the through hole 21a, and the ratio of the depth D _{11 to the distance L 11} between the opposite sides of the cell 11a. Is similar to those relating to the first embodiment, and the details thereof will be omitted with reference to the above description.

<Manufacturing method when having a honeycomb pattern structure>
When the partition wall 30 constitutes the above-mentioned honeycomb pattern structure, the first manufacturing method or the second manufacturing method described with respect to the first embodiment may be applied as the manufacturing method of the porous sheet 100. When the first manufacturing method is applied, when a plurality of base material portions 32 are bonded together so that the positions of the convex portions correspond to each other, for example, an adhesive is applied to the base material portion 32. Alternatively, the highly absorbent polymer 42 can be adhered to the surface of the base material portion 32 by immersing the base material portion 32 in the adhesive. When the second manufacturing method is applied, when a laminate in which base materials are laminated is obtained, for example, by applying an adhesive to the laminated base materials or immersing the laminate in an adhesive. The highly absorbent polymer 42 can be adhered to the surface of the base material.

<Structure of corrugated pattern>
As shown in FIGS. 17 and 18, in the porous sheet 100, it is preferable that the partition wall 30 has a corrugated pattern structure composed of repeating a corrugated flute portion 35 and a flat plate-shaped liner portion 36. In the third embodiment, the highly absorbent polymer 42 is attached to the surfaces of the flute portion 35 and the liner portion 36. Regarding the other components in the structure of the corrugated pattern shown in FIGS. 17 and 18, and the preferable shape of the cell 11a, the details thereof will be omitted with reference to the description of <structure of the corrugated pattern> according to the first embodiment. _{Further, a preferable numerical range as the interval L 21} of the liner portion 36, _{the pitch L 22} of the waveform of the flute portion 35, _{the depth D 21} of the through hole 21b, and the ratio of the depth D _{21 to the interval L 21} of the liner portion 36. Is the same as those relating to the first embodiment, and the details thereof will be omitted by referring to the above description.

<Manufacturing method when having a corrugated pattern structure>
When the partition wall 30 constitutes the structure of the corrugated pattern described above, the third manufacturing method described with respect to the first embodiment may be applied as the manufacturing method of the porous sheet 100. When the third manufacturing method is applied, when the plurality of flute portions 35 and the plurality of liner portions 36 are alternately bonded to each other, for example, an adhesive is applied to the flute portion 35 and the liner portion 36, or the flute portion 35 and the flute portion 35 are attached to each other. By immersing the liner portion 36 in the adhesive, the highly absorbent polymer 42 can be adhered to the surface of the base material.

[Laminate]
In the third embodiment, in the laminated body 200, the top sheet 51 and the support sheet 54 are arranged on both main surfaces of the porous sheet 100, and the side of the support sheet 54 opposite to the surface on which the porous sheet 100 is provided. It is a laminated structure in which a back sheet 55 is provided on the surface of the surface. That is, the laminated body 200 has the same configuration as that of the first embodiment except that the laminate 200 has the support sheet 54 instead of the absorber 40 in the first embodiment, and the above description is used as an reference. Details will be omitted.

<Top sheet>
The top sheet 51 of the third embodiment has a larger width direction than the perforated sheet 100 and the support sheet 54, covers the perforated sheet 100 and the support sheet 54 from the side facing the skin, and is in a state where the disposable diaper 300 is attached. It is configured to have a structure in which it comes into contact with the wearer's skin to allow excreted water to permeate and be absorbed by the porous sheet 100. The details of the other configurations will be omitted with reference to the description of the <top sheet> of the first embodiment.

<Support sheet>
The support sheet 54 is a sheet-like member arranged on the non-skin facing surface side of the porous sheet 100 in the laminated body 200. The support sheet 54 absorbs water such as liquid components contained in urine and loose stool to prevent reversion. Therefore, the support sheet 54 is made of a fiber material having excellent water absorption.

Examples of the fiber material constituting the support sheet 54 include cellulosic fibers such as pulp fibers, rayon fibers and cotton fibers; and synthetic fibers such as polyethylene, polypropylene and polyethylene terephthalate which have been hydrophilized. .. These may be used individually by 1 type, and may be used in combination of 2 or more type.

<Back sheet>
The back sheet 55 is arranged on the non-skin facing surface side with respect to the perforated sheet 100 and the support sheet 54 to prevent excrement from leaking from the perforated sheet 100 and the support sheet 54 to the non-skin facing surface side. The details of the other configurations will be omitted with reference to the description of the <back sheet> of the first embodiment.

In the third embodiment, each component of the side sheet 61, the cover sheet 62, and the gather 70 may be configured in the same manner as the corresponding element described in the first embodiment, and the above description is incorporated. The details will be omitted. Among these, in the cover sheet 62, since the paper diaper 300 of the third embodiment has the support sheet 54 instead of the absorber 40, the first cover sheet 63 passes through the back sheet 55. The perforated sheet 100 and the support sheet 54 are covered from the non-skin facing surface side.

[About a modified example of a porous sheet]
In the above description, the case where the perforated sheet 100 according to the third embodiment has a plate-shaped partition wall 30 forming a honeycomb pattern structure and includes a sheet body 10 in which a through hole 21a surrounded by the partition wall 30 is formed. The explanation was given as an example. Further, when the structure of this honeycomb pattern consists of a plurality of cells 11a composed of a through hole 21a and a plate-shaped cell wall 31 surrounding the through hole 21a (see FIGS. 15 and 16), or The case where the perforated sheet 100 has a partition wall 30 constituting the structure of the corrugated pattern (see FIGS. 17 and 18) has been described as an example. The structure of the perforated sheet 100 is not limited to this, and may be appropriately changed as long as it has a partition wall 30 for partitioning the through hole 21. For example, the partition wall 30 of the perforated sheet 100 may form a roll core pattern structure in which a plurality of flute portions having a columnar repeating structure are laminated. Alternatively, as shown in FIGS. 19 and 20, the partition wall 30 of the perforated sheet 100 has a through hole 21c and a through hole 21c, as in the modified example described with reference to FIGS. 7 and 8 with respect to the first embodiment. A structure may be configured in which a plurality of cells 11c formed by a cell wall 38 having a thickness larger than that of the plate-shaped cell wall 31 described above are assembled. In FIGS. 19 and 20, one of the cells 11c is surrounded by a two-dot chain line. In the structure of this modification, the highly absorbent polymer 42 is attached to the surface of the partition wall 30. Other matters such as the preferable shape and porosity of the cell 11c are the same as those related to the first embodiment, and the details thereof will be omitted by referring to the above description.

Further, when the partition wall 30 constitutes the above-mentioned structure, the fourth manufacturing method or the fifth manufacturing method described with respect to the first embodiment may be applied as the manufacturing method of the porous sheet 100 of the modified example. When the fourth manufacturing method is applied, for example, by applying an adhesive to a member provided with the through hole 21c or immersing the member provided with the through hole 21c in an adhesive, high absorption is achieved on the surface of the member. It can be produced by adhering the sex polymer 42. Further, when the fifth manufacturing method is applied, when the molded aggregate is taken out from the mold container, for example, an adhesive is applied to the molded aggregate or the molded aggregate is immersed in the adhesive. Allows the highly absorbent polymer 42 to adhere to the surface of the aggregate.

[2. Action and effect]
Since the porous sheet 100 and the disposable diaper 300 of the present embodiment are configured as described above, the following actions and effects can be obtained.

(1) Conventionally, when using a disposable diaper, the solid component of loose stool is difficult to pass through the top sheet and is not easily absorbed by the absorber, so that it has been a problem that it leaks to the outside of the disposable diaper. Therefore, in order to prevent leakage of loose stool, an absorbent article is known in which a top sheet made of a non-woven fabric is made thick and a plurality of holes are formed to hold loose stool through the holes. Further, there is known an absorbent article in which loose stool is captured by these continuous fibers or a bundle by providing a bundle of continuous fibers or bundles of fibers on the upper surface of the top sheet. Further, there is known an absorbent article that forms a space between a top sheet and an absorber and accommodates loose stool in this space. In each of these absorbent articles, loose stool can be taken in by the taking-in means provided therein. However, in each case, loose stool is held by a taking-in means that is soft and easily deformed. Therefore, when the wearer wears a disposable diaper and performs an action such as sitting or turning over, the taking-in means for taking in loose stool is deformed, and the taking-in means from this taking-in means is deformed. Loose stools sometimes leaked and adhered to the wearer's skin or leaked from disposable diapers. Further, an absorbent article having a through hole in the absorber itself is also known, but the purpose is to improve the air permeability, and it cannot be said that it is sufficient as a countermeasure against leakage of loose stool.

In the perforated sheet 100, the sheet body 10 has a partition wall 30 for partitioning the through hole 21. Therefore, the porous sheet 100 can take in loose stool from the end face 10a and retain the solid component contained in the loose stool inside the through hole 21. Then, in the first embodiment, the through hole 21 has a depth larger than the hole diameter. Thereby, the solid component contained in the loose stool can be more reliably retained inside the through hole 21. Further, the liquid component contained in the loose stool can be discharged from the end face 10b. In this way, the porous sheet 100 can take in and retain the solid component of loose stool that was difficult to be absorbed by the absorber. Further, for example, conventionally, there has been a situation in which loose stools have diffused in the surface direction without passing through the top sheet, but by preventing such diffusion of loose stools in the surface direction, the porous sheet 100 is directed toward the thickness direction. Allows the components contained in loose stool to pass through. Further, in the perforated sheet 100, the through hole 21 is partitioned and the through hole 21 is supported by the partition wall 30 surrounding the partition, so that the perforated sheet 100 exhibits a relatively high strength against an external force. Therefore, even when a load is applied from the outside, the perforated sheet 100 is less likely to be crushed because the partition wall 30 and the through hole 21 are suppressed from being deformed. Therefore, the perforated sheet 100 can more stably hold loose stool inside the through hole 21. Above all, the partition wall 30 around the through hole 21 exhibits high strength against the extending force in the thickness direction, and this direction is in the axial direction connecting both ends of the end face 10a side and the end face 10b side of the through hole 21. Along. Therefore, the perforated sheet 100 has excellent strength against a force applied from the end face 10a or the end face 10b side that takes in loose stool, and can stably hold loose stool.

(2) Further, in the second embodiment, the partition wall 30 has a through hole 22 that communicates with the adjacent through hole 21 and allows moisture to permeate. As a result, water such as liquid components contained in urine and loose stools taken into the perforated sheet 100 can permeate through the partition wall 30 through the permeation holes 22. Therefore, the water content in the porous sheet 100 can be diffused in the porous sheet 100 by spreading to the adjacent through holes 21. Therefore, when loose stool is taken into the porous sheet 100, the solid component contained in the loose stool is retained in the through hole 21 near the portion where the loose stool is taken into the porous sheet 100, and the liquid component contained in the loose stool is The loose stool is diffused into the porous sheet 100 from the vicinity of the portion where the loose stool is taken in toward the periphery thereof. Further, even when urine is further excreted in a state where loose stool is taken in by the porous sheet 100, the urine is diffused into the porous sheet 100 through the site where the loose stool is taken in. In this way, when loose stool or urine is taken into a part of the porous sheet 100, water is diffused to the surroundings by the permeation hole 22, so that the loose stool in the through hole 21 near the part where the loose stool is taken in is The solid component, the liquid component, and urine can be prevented from overflowing from the porous sheet 100 and can be retained in the porous sheet 100. Further, even when the partition wall 30 is deformed by applying an external force from the perforated sheet 100, the moisture in the through hole 21 spreads to the adjacent through hole 21 by the through hole 22, so that the through hole 21 is deformed. It can absorb the reduced volume, prevent loose stool and urine from overflowing, and retain it in the porous sheet 100.

(3) Further, in the third embodiment, the highly absorbent polymer 42 is attached to the partition wall 30. The perforated sheet 100 can absorb and retain water such as liquid components contained in urine and loose stool by the highly absorbent polymer 42. Therefore, according to the porous sheet 100, the solid component contained in the loose stool is retained in the through hole 21 of the porous sheet 100, and the liquid component contained in the loose stool is retained in the highly absorbent polymer 42. Therefore, urine and loose stool excreted from the wearer can be prevented from leaking from the porous sheet 100 and can be retained in the porous sheet 100. Further, in the perforated sheet 100, loose stool is held in the perforated sheet 100 and kept away from the wearer's skin, so that the wearer's skin surface is kept clean, skin troubles such as a rash on the buttocks, and stool come into contact. It is possible to suppress or eliminate the discomfort caused by this. Further, as described above, since the porous sheet 100 exhibits high strength against an external force, the influence of the external force on the highly absorbent polymer 42 in the porous sheet 100 can be suppressed. Therefore, even when an external force is applied to the porous sheet 100, the phenomenon (wet back) in which the liquid component absorbed by the highly absorbent polymer 42 returns to the skin surface side of the wearer is suppressed, and the skin surface is restored. Can be prevented from adhering.

(4) Further, in the perforated sheet 100, the partition wall 30 constitutes a honeycomb pattern structure. As a result, by increasing the area occupied by the through hole 21 with respect to the partition wall 30 in the plan view of the porous sheet 100, the weight of the porous sheet 100 can be reduced and the amount of loose stool that can be taken into the inside can be increased. In addition to this, the porous sheet 100 is excellent in strength in the thickness direction and the surface direction. Further, the porous sheet 100 in which the partition wall 30 constitutes a honeycomb pattern structure has relatively little anisotropy with respect to the strength in the surface direction, and exhibits the same strength against loads applied from different directions in the surface direction. Further, the porous sheet 100 in which the partition wall 30 constitutes a honeycomb pattern structure has relatively little anisotropy with respect to bending, and can be flexed and deformed to the same extent in different directions in the plane direction. Therefore, the perforated sheet 100 in which the partition wall 30 constitutes the structure of the honeycomb pattern is excellent in the degree of freedom in design and arrangement.

(5) Further, in the perforated sheet 100, the partition wall 30 constitutes a corrugated pattern structure. As a result, by increasing the area occupied by the through hole 21 with respect to the partition wall 30 in the plan view of the porous sheet 100, the weight of the porous sheet 100 can be reduced and the amount of loose stool that can be taken into the inside can be increased. In addition to this, the porous sheet 100 is also excellent in strength in the thickness direction and the surface direction. Further, the porous sheet 100 in which the partition wall 30 constitutes a corrugated pattern structure has anisotropy with respect to the strength in the surface direction, and is excellent in the strength against a load applied in the horizontal direction with the wall surface of the liner portion 36. Further, the perforated sheet 100 in which the partition wall 30 constitutes a corrugated pattern structure has anisotropy with respect to bending, is difficult to bend along a direction parallel to the wall surface of the liner portion 36, and is in a direction orthogonal to this, that is, a liner. It exhibits a characteristic of being easily bent along a direction perpendicular to the wall surface of the portion 36. Therefore, in the porous sheet 100 in which the partition wall 30 constitutes the structure of the corrugated pattern, the porous sheet 100 can be arranged or used according to the required performance by utilizing the anisotropy with respect to the strength or bending.

(6) In the first embodiment and the second embodiment, the disposable diaper 300 includes a porous sheet 100 and an absorber 40 provided on the other end surface 10b side of the porous sheet 100 and containing a highly absorbent polymer 42. There is. As a result, the liquid component contained in the loose stool taken into the porous sheet 100 flows out from the end face 10b side of the porous sheet 100 and is absorbed by the absorber 40. Then, the liquid component spreads and is retained inside the absorber 40. Therefore, the solid component contained in the loose stool is retained in the through hole 21 of the porous sheet 100, and the liquid component contained in the loose stool is retained in the absorber 40. Therefore, the loose stool excreted from the wearer can be prevented from leaking from the disposable diaper 300 and can be kept in the disposable diaper 300.

Further, in the second embodiment, since the partition wall 30 has the through holes 22, water is diffused in the porous sheet 100. Then, the absorber 40 can absorb the diffused water. Therefore, the moisture incorporated in a part of the porous sheet 100 can be rapidly absorbed and retained in a wider area by the porous sheet 100 and the absorber 40.

Further, in the first embodiment and the second embodiment, in the paper diaper 300, the perforated sheet 100 and the absorber 40 hold the loose stool and keep it away from the wearer's skin, so that the wearer's skin surface is kept clean. It is possible to suppress or eliminate skin troubles such as a rash on the buttocks and discomfort caused by contact with stool. Further, since the absorber 40 is provided on the non-skin facing surface side of the porous sheet 100, the porous sheet 100 is located between the wearer's skin surface and the absorber 40. Therefore, even when the liquid component absorbed by the absorber 40 returns to the skin surface side of the wearer (wet back), the skin surface is separated from the absorber 40 by the porous sheet 100. Therefore, it is possible to prevent the adhesion to the skin surface.

Further, in the third embodiment, the disposable diaper 300 includes a perforated sheet 100 and a support sheet 54 provided on the other end surface 10b side of the perforated sheet 100 and absorbing moisture. As a result, when water such as liquid components contained in urine or loose stool taken into the porous sheet 100 flows out from the end face 10b side of the porous sheet 100, the support sheet 54 quickly absorbs the water and prevents reversion. To. Further, as described above, the porous sheet 100 exhibits high strength against external force, and above all, is excellent in strength in the thickness direction connecting the end face 10a and the end face 10b. Therefore, for example, when the perforated sheet 100 is arranged in or around the wearer's anus with the end face 10a facing, when the wearer defecates, loose stool can be taken into the through hole 21 from the end face 10a. .. Further, by taking actions such as sitting or turning over of the wearer, even when a load by the wearer is applied from the end face 10a in the thickness direction, the through hole 21 and the partition wall 30 are suppressed from being deformed and the through hole is formed. It is possible to keep the loose stool held inside the 21.

Further, in each embodiment, as described above, the porous sheet 100 exhibits high strength against external force, and above all, is excellent in strength in the thickness direction connecting the end face 10a and the end face 10b. Therefore, for example, when the perforated sheet 100 is arranged in or around the wearer's anus with the end face 10a facing, when the wearer defecates, loose stool can be taken into the through hole 21 from the end face 10a. .. Further, by taking actions such as sitting or turning over of the wearer, even when a load by the wearer is applied from the end face 10a in the thickness direction, the through hole 21 and the partition wall 30 are suppressed from being deformed and the through hole is formed. It is possible to keep the loose stool held inside the 21. In addition, in the second embodiment, even when the partition wall 30 is deformed by applying an external force from the porous sheet 100, the moisture in the through hole 21 spreads and spreads to the adjacent through hole 21 by the through hole 22. The water is rapidly absorbed and retained by the absorber 40. Therefore, the solid component and the liquid component of loose stool can be more reliably retained in the porous sheet 100 and the absorber 40.

(7) The disposable diaper 300 is provided on one end surface 10a side of the perforated sheet 100, and further includes a top sheet 51 having water permeability and a passing portion 52 through which stool passes. As a result, the top sheet 51 is arranged on the outermost surface of the laminated body 200 including the perforated sheet 100, so that the wearer's skin surface comes into contact with the top sheet 51. Therefore, it is possible to reduce or eliminate the discomfort that may occur when the wearer's skin comes into direct contact with the porous sheet 100, and improve the feel of the skin. Further, the top sheet 51 can allow the liquid component contained in the loose stool to permeate, and the solid component contained in the loose stool can be passed through the passing portion 52. Then, the liquid component that has passed through the top sheet 51 passes through the porous sheet 100 in the first embodiment and the second embodiment and is absorbed by the absorber 40, and in the third embodiment, the height contained in the partition wall 30. It is absorbed by the absorbent polymer 42.

Further, the solid component that has passed through the top sheet 51 is taken into the porous sheet 100 and held. In this way, the disposable diaper 300 is provided with the top sheet 51 to allow excrement containing a liquid component such as urine and a solid component and a liquid component such as loose stool to pass through while improving the touch. These can be retained without causing side leakage.

[3. Others]
[About absorbent articles]
In the above description, the case of the pants-type disposable diaper 300 as an absorbent article has been described as an example. The absorbent article is not limited to this, and can be appropriately used as another absorbent article provided with the porous sheet 100 or the laminate 200. Examples of such an absorbent article include a pad used for a bed. A mattress is a mat-like bedding that is laid on a mattress placed on a bed. A user such as a sleeping person or a person requiring long-term care can lie down on a mattress and sleep on a mattress. This absorbent article (laying pad) includes a laminate 200, and is installed with the top sheet 51 facing upward in the gravity direction and the back sheet 55 facing the lower side in the gravity direction, that is, the mattress side. At this time, the pad may have a size that covers the entire bed or substantially the entire bed, and when the user lies on the bed, the position corresponding to the anus or the peripheral portion, or the lumbar region. Alternatively, the size may be large enough to cover the surrounding portion. Further, the paving pad may have a non-slip treatment on the lower surface of the back sheet 55. From the viewpoint of facilitating the passage, uptake, and absorption of excrement, the pad is preferably used so that the user can directly contact it without laying bed sheets or the like on it.

According to such a pad, loose stool passes through the top sheet 51 when the user excretes on the bed on which the pad is installed. Then, the loose stool is taken into the through hole 21 of the porous sheet 100, and the solid component contained in the loose stool is held in the through hole 21. Further, the liquid component contained in the loose stool flows out from the through hole 21 in the first embodiment and the second embodiment, is absorbed and held by the absorber 40, and is contained in the partition wall 30 in the third embodiment. It is absorbed and retained by the highly absorbent polymer 42. Urine also passes through the top sheet 51 and the porous sheet 100 and is absorbed and retained by the absorber 40 in the first and second embodiments, and is absorbed and retained by the highly absorbent polymer 42 in the third embodiment. To. In this way, the pad allows the excrement to be retained and prevented from spreading even when the user is not wearing a diaper. Above all, it is effective for loose stool containing a solid component and a liquid component. In addition, when a user wearing a diaper excretes on a bed with a pad, the excrement such as loose stool or urine leaked from the diaper can be held and spread in the same manner. Can be prevented.

[About perforated sheets and laminates]
In the above description, the case where the perforated sheet 100 and the laminated body 200 are provided in the disposable diaper 300 has been described as an example. The perforated sheet 100 and the laminated body 200 are not limited to this, and can be appropriately used in addition to disposable diapers. For example, the perforated sheet 100 and the laminated body 200 can be used as a pad as described above. Further, the perforated sheet 100 and the laminated body 200 may be used independently as a pad. In this case, for example, the perforated sheet 100 is installed on a mattress placed on the bed. At this time, the perforated sheet 100 may have a size that covers the entire bed or substantially the entire bed, and when the user lies on the bed, the position corresponding to the anus or the peripheral portion thereof, or It may be sized to cover the lumbar region or a portion around it. From the viewpoint of facilitating the passage, uptake, and absorption of excrement, the perforated sheet 100 is preferably used so that the user can directly contact it without laying bed sheets or the like on it. According to such a perforated sheet 100, when the user excretes on the bed on which the perforated sheet 100 is installed, loose stool is taken into the through hole 21 of the perforated sheet 100 and penetrates the solid component contained in the loose stool. It can be held in the hole 21 to prevent the solid component from spreading laterally. In the third embodiment, water such as a liquid component contained in urine or loose stool can be further absorbed and retained by the highly absorbent polymer 42 contained in the partition wall 30. In addition, when the user wearing the diaper excretes on the bed on which the perforated sheet 100 is installed, the excrement such as loose stool leaked from the diaper is similarly held and prevented from spreading. be able to.

Further, the perforated sheet 100 and the laminated body 200 can be used as an absorption pad. The absorbent pad is attached to underwear or a pants-type exterior body made of cloth called holder pants made for holding the absorbent pad to absorb excrement. In the first embodiment and the second embodiment, according to the perforated sheet 100, loose stool is taken into the through hole 21 and the solid component contained in the loose stool is brought into the through hole 21 in the same manner as when the disposable diaper 300 is provided. By holding it, it is possible to prevent the solid component from spreading in the lateral direction. Further, in the first embodiment and the second embodiment, according to the laminated body 200 of this example, the loose stool is taken into the through hole 21 and the solid component contained in the loose stool is taken in as in the case of being provided in the disposable diaper 300. The liquid component contained in the loose stool can be absorbed and held by the absorber 40 while being held in the through hole 21 to prevent the spread. Further, in the third embodiment, according to the perforated sheet 100 and the laminated body 200, loose stool is taken into the through hole 21 and the solid component contained in the loose stool is taken into the through hole 21 in the same manner as in the case of being provided in the disposable diaper 300. By holding it in, it is possible to prevent the solid component from spreading in the lateral direction. Further, in the third embodiment, water such as a liquid component contained in urine or loose stool can be absorbed and retained by the highly absorbent polymer 42 contained in the partition wall 30.

[About the hole diameter and arrangement of through holes]
In the above description, a case where through holes 21 having the same hole diameter are arranged has been described as an example. The pore diameter of the through hole 21 is not limited to this, and the pore diameters of the through holes 21 included in one perforated sheet 100 may be different from each other, and the pore diameter may be changed according to the position in the perforated sheet 100. Further, the arrangement of the through holes 21 may be non-uniform, and the distribution of the through holes 21 may be changed according to the position in the porous sheet 100. For example, the density of the cells 11 contained in a part of the region may be increased to increase the number of through holes 21, or the density of the cells 11 included in a part of the region may be decreased to reduce the number of through holes 21. Good.

[About the arrangement of perforated sheets]
In the above description, a case where one perforated sheet 100 is provided on the crotch portion 300B of the paper diaper 300 has been described as an example. The arrangement of the perforated sheet 100 is not limited to this, and for example, as described below, the perforated sheet 100 may be divided into a plurality of parts in the plane direction and arranged.

FIG. 21 shows, as a modification of the porous sheet 100, a case where the porous sheet 100 is divided into a plurality of parts in the plane direction. In FIG. 21, the top sheet 51 and the perforated sheet 100 are extracted from the developed view of the paper diaper (absorbent article) shown in FIG. The porous sheet 100 shown in FIG. 21 is divided into a plurality of porous sheet pieces 110 in the surface direction. The plurality of perforated sheet pieces 110 are continuously provided in the width direction and the longitudinal direction, and the plurality of connected perforated sheet pieces 110 form one perforated sheet 100 as a whole. In each perforated sheet piece 110, the partition wall 30 has the honeycomb pattern structure shown in FIGS. 3, 4, 10, 11, 15, 16 above, or the above-mentioned FIGS. 5, 6, 12, 13, 17, 18. It constitutes the structure of the corrugated pattern shown. In this case, the perforated sheet 100 is likely to be bent at the portion where the perforated sheet pieces 110 are connected to each other. Therefore, when the partition wall 30 constitutes the structure of the honeycomb pattern or the structure of the corrugated pattern, the ease of bending in the thickness direction of the entire porous sheet 100 is improved, and the partition wall 30 is along the wearer's body. The paper diaper 300 can be easily folded. It can improve process moldability and fit when worn. This improves the leakage prevention performance.

Further, in the configuration in which the plurality of porous sheet pieces 110 shown in FIG. 21 are connected in succession, the porous sheet piece 110 having a honeycomb pattern structure and the porous sheet piece 110 having a corrugated pattern structure are combined into one piece. Perforated sheet 100 may be formed. In this case, the arrangement position of the porous sheet piece 110 having the honeycomb pattern structure and the porous sheet piece 110 having the corrugated pattern structure and the orientation of the porous sheet piece 110 having the corrugated pattern structure in the extending direction are appropriately set. By setting, it is possible to obtain a porous sheet 100 that is more excellent in strength in the thickness direction and the surface direction and is easily bent and deformed. As a result, the fit is further improved, and loose stool can be easily taken in by following the wearer's skin surface in the longitudinal direction of the disposable diaper 300.

Further, in each of the above embodiments, the perforated sheet 100 has a partition wall 30 that constitutes a honeycomb pattern structure or a partition wall 30 that constitutes a corrugated pattern structure on the entire surface thereof, but the configuration is limited to this. Instead, a partition wall 30 forming a honeycomb pattern structure or a partition wall 30 forming a corrugated pattern structure may be arranged on a part of the porous sheet 100. In FIG. 22, of the perforated sheet 100, only the position 120 of the wearer's urethra (shown by the broken line in FIG. 22) and the position 125 of the anus (shown by the broken line in FIG. 22) when the disposable diaper 300 is worn. , The case where the partition wall constituting the structure of the honeycomb pattern or the partition wall constituting the structure of the corrugated pattern is arranged is given as an example. As shown in FIG. 22, the partition wall constituting the structure of the honeycomb pattern or the portion where the structure of the corrugated pattern is arranged is a main part responsible for absorption and retention of urine and feces (position 120 of the urethra and position of the anus). 125 and) are suitable. In this case, while maintaining the advantages of the honeycomb pattern structure or the corrugated pattern structure described above, the ease of bending in the thickness direction of the entire perforated sheet 100 is improved, and the workability and fit when worn are improved. Can be better.

In the first and second embodiments, the structure of the laminated body 200 in which the absorber 40 is provided on the end surface 10b side, which is one of the main surfaces of the porous sheet 100, is taken as an example, and the third embodiment is also described. In the example, the structure of the laminated body 200 in which the support sheet 54 is provided on the end surface 10b side which is the other main surface of the porous sheet 100 has been shown as an example, but in each embodiment, the structure is absorbed by the end surface 10b side of the porous sheet 100. The structure of the laminate 200 provided with both the body 40 and the support sheet 54 may be applied.
Further, in the first embodiment and the second embodiment, the structure of the laminated body 200 in which the support sheet 54 is provided on the end face 10b side of the porous sheet 100 may be applied, and in the third embodiment, the porous sheet 100 may be applied. The structure of the laminated body 200 may be applied to the end face 10b side of the above.
In addition, various configurations disclosed in the first embodiment, the second embodiment, and the third embodiment may be combined. For example, the perforated sheet 100 has a partition wall 30 for partitioning the through hole 21, the through hole 21 has a depth larger than the hole diameter, and the side surface portion of the partition wall 30 is permeated to allow moisture to permeate. It may have a structure having holes 22 and having a highly absorbent polymer 42 attached to the partition wall 30.

[About the seat body]
It is added just in case that other sheets (for example, top sheets) like the perforated sheet 100 include the concept of "sheet body".

[Fourth Embodiment]
A filament three-dimensional conjugate on which a honeycomb loop structure layer is formed can be used for the porous sheet provided with the partition wall constituting the honeycomb pattern structure described above. Next, a filament three-dimensional conjugate applicable to a porous sheet having a partition wall constituting the structure of the honeycomb pattern will be described below with reference to the drawings. The vertical, horizontal, and front-back directions (directions orthogonal to each other) in the following description are as shown in FIG. 23 and the like. The downward direction corresponds to the vertical downward direction, and the front-back and left-right directions are included in the horizontal direction.

I. Filament three-dimensional bond manufacturing device First, an example of a manufacturing device (filament three-dimensional bond manufacturing device) for manufacturing a filament three-dimensional bond according to the present embodiment will be described. FIG. 23 is a schematic configuration diagram of the manufacturing apparatus 401. FIG. 24 is a cross-sectional view taken along the line III-III of the manufacturing apparatus 401 shown in FIG. 23, and FIG. 25 is a schematic configuration diagram of the vicinity of the thickness regulating portion 422 shown in FIG. 23.

The manufacturing apparatus 401 cools and solidifies the molten filament supply device 410, which discharges the molten filament group 402 composed of the plurality of molten filaments downward in the vertical direction, while the plurality of molten filaments are three-dimensionally fused and bonded to each other. The device includes a three-dimensional bond forming device 420 that forms a filament three-dimensional bond in which molten filaments are three-dimensionally fused and bonded to each other.

The molten filament supply device 410 includes a pressure melting unit 411 (extruder) and a die 412. The pressure melting section 411 includes a material charging section 413 (hopper), a screw 414, a screw motor 415, a screw heater 416, and a plurality of temperature sensors (not shown).

Inside the pressure melting section 411, a cylinder 411a for transporting the thermoplastic resin supplied from the material charging section 413 while heating and melting is formed, and the screw 414 is rotatably accommodated. A filament discharge portion 411b for discharging the thermoplastic resin toward the die 412 is formed at the downstream end of the cylinder 411a.

The die 412 includes a nozzle portion 417 in which a plurality of nozzle holes are formed, a plurality of die heaters 418a to 418f, and a plurality of temperature sensors (not shown). Inside the die 412, a guide flow path 412a for guiding the molten thermoplastic resin discharged from the filament discharge part 411b of the pressure melting part 411 to the nozzle part 417 is formed.

The three-dimensional bond forming device 420 is a device that fuse-bonds and cools and solidifies the molten filament group 402 supplied from the molten filament supply device 410 to form a filament three-dimensional bond. The three-dimensional bond forming apparatus 420 includes a cooling water tank 421 for storing cooling water for cooling the molten filament group 402, a thickness regulating section 422 for forming a three-dimensional bond while regulating the thickness of the molten filament group 402, and a conveyor section 424. And a plurality of transfer rollers 425a to 425h.

The thickness regulating portion 422 is composed of a pair of receiving plates 422a and 422b formed of two metal plates, and they are arranged so as to face each other in the front-rear direction with a predetermined gap. The pair of receiving plates 422a and 422b are arranged substantially symmetrically with respect to a plane of symmetry (the normal direction coincides with the front-rear direction) located between them. The receiving plates 422a and 422b have inclined surfaces 422a1 and 422b1 which are inclined downward so as to approach the plane of symmetry, and vertical planes 422a2 and 422b2 extending vertically downward from the lower ends thereof. The joint points (joint lines extending in the left-right direction) of the inclined surfaces 422a1, 422b1 and the vertical surfaces 422a2, 422b2 are arranged so as to substantially coincide with the water surface of the cooling water stored in the cooling water tank 421.

A water supply port (not shown) is provided upstream of the inclined surfaces 422a1 and 422b1, and a water film is formed on the surface of the inclined surfaces 422a1 and 422b1. The molten filaments in the vicinity of both ends in the thickness direction of the molten filament group are received by the inclined surfaces 422a1 and 422b1 and then guided between the vertical faces 422a2 and 422b2 by sliding the inclination, and the cooling water of the cooling water tank 421. It is cooled and solidified by, and at the same time, it is fused and bonded to form a smooth high-density surface layer (the surface layer at the end in the thickness direction of the filament three-dimensional bond).

The conveyor unit 424 is composed of a pair of conveyors 424a and 424b (a pair of slat conveyors), and below the pair of receiving plates 422a and 422b, a gap corresponding to the thickness of the filament three-dimensional coupling is provided in the front-rear direction. They are arranged so as to face each other. The conveyors 424a and 424b drive the filament three-dimensional coupler 403 sent from the thickness regulating unit 422 into the gap so as to convey it downward. The driving speed of the transport conveyors 424a and 424b (the transport speed of the filament three-dimensional coupler) is set to a speed slower than the falling speed of the molten filament because the loop of the molten filament is not formed when the speed is equal to or higher than the falling speed of the molten filament. To.

The slower the moving speed of the conveyors 424a and 424b, the higher the density of the molten filaments, and a high-density filament three-dimensional conjugate having a high repulsive force is formed. The repulsive force is determined according to the specifications of the article in which the filament three-dimensional conjugate is used, but is usually set to about 5 to 20% with respect to the falling speed of the molten filament. The specific form of the transfer conveyors 424a and 424b is not particularly limited as long as the transfer member has a smooth transfer surface, and a conveyor using a metal mesh belt or a plastic modular chain may be used.

It is desirable that the transfer conveyors 424a and 424b are provided in accordance with the outer peripheral shape of the filament three-dimensional coupler so as to come into contact with the entire outer peripheral surface parallel to the transport direction of the filament three-dimensional coupler. However, in consideration of complicating the mechanism of the conveyors 424a and 424b in this way, the conveyors 424a and 424b are not brought into contact with both ends of the filament three-dimensional coupling, and are located near the central portion having a uniform thickness. It may be carried by contacting only with. On the downstream side of the transport conveyors 424a and 424b in the transport direction, a plurality of transport rollers 425a to 425h for transporting the filament three-dimensional coupler to the outside of the cooling water tank 421 are provided.

The thickness regulating section 422, the conveyor section 424, and the plurality of transport rollers 425a to 425h are driven by a drive motor and drive gear (not shown) to transport the molten filament group 402 or the filament three-dimensional coupler 403. The driving speed can be adjusted by a predetermined operation or the like, and the transport speed (take-up speed) of the filament three-dimensional conjugate can be adjusted. The filament three-dimensional coupler 403 is sufficiently cooled by the cooling water, transported to the outside of the cooling water tank 421, and cut to an appropriate length, whereby the filament three-dimensional coupler 500 (see FIG. 33 and the like). Is obtained.

Regarding the filament three-dimensional couplers (403, 500), the length direction corresponds to the transport direction of the filament three-dimensional couplers by the transport conveyors 424a, 424b, etc. (the vertical direction at the time of passing through the thickness regulating portion 422). The thickness direction corresponds to the direction in which the pair of thickness regulating portions 422 face each other (the front-rear direction at the time of passing through the thickness regulating portion 422), and the width direction is the direction orthogonal to the length direction and the thickness direction (thickness regulation). Corresponds to the left-right direction at the time of passing through the portion 422).

FIG. 26 is a plan view (viewed from below) of the nozzle portion 417 shown in FIG. 23. The nozzle portion 417 is a substantially rectangular parallelepiped metal thick plate in which a plurality of nozzles (circular openings) 417a are formed, and is provided below the die 412 which is the most downstream portion of the guide flow path 412a.

Each nozzle 417a in the present embodiment has a circular opening having a nozzle diameter of 1 mm, and is arranged in a staggered pattern with a nozzle pitch of 10 mm. That is, the distance between the adjacent nozzles 417a is 10 mm, and six other nozzles 417a (10 mm apart from the one nozzle 417a, respectively) around one nozzle 417a excluding the one arranged on the end side. Each nozzle 417a is arranged so that the one nozzle 417a is located at a position shifted by 60 ° from the center). By arranging the nozzles 417a in a staggered manner in this way, it becomes easy to form a multi-layered multi-row honeycomb loop structure described later. The nozzle diameter, nozzle pitch, nozzle shape, and nozzle arrangement can be appropriately adjusted based on the specifications of the repulsive force of the filament three-dimensional coupling and the height ratio during compression.

Examples of the thermoplastic resin that can be used as the material of the filament three-dimensional bond in the present embodiment include polyolefin resins such as polyethylene and polypropylene, polyester resins, polyamide resins, polyvinyl chloride resins and polystyrene resins, and styrene. Thermoplastic elastomers such as based elastomers, vinyl chloride-based elastomers, olefin-based elastomers, urethane-based elastomers, polyester-based elastomers, nitrile-based elastomers, polyamide-based elastomers, and fluorine-based elastomers can be used.

The thermoplastic resin supplied from the material input section 413 is heated and melted in the cylinder 411a, and then supplied as a molten thermoplastic resin from the filament discharge section 411b to the guide flow path 412a of the die 412. The molten thermoplastic resin is discharged from a plurality of nozzles 417a in the nozzle portion 417 toward the three-dimensional bond forming apparatus 420 as a molten filament group 402 composed of a plurality of molten filaments.

II. Filament loop structure Each of the resin filaments that make up the filament three-dimensional bond forms a loop structure such as a random loop structure or a honeycomb loop structure, and the formation is related to the manufacturing conditions of the filament three-dimensional bond and the like. There is. Hereinafter, the formation of these loop structures will be described in detail.

In the process of manufacturing the filament three-dimensional coupler, a loop in which the molten filament is dropped from each nozzle (corresponding to each nozzle 417a of the present embodiment) into cooling water and spreads in the horizontal direction (hereinafter referred to as “filament loop”). Is formed by the buoyancy of water. Usually, the spread of the filament loop (loop diameter which is the diameter of the loop) is larger than the distance between adjacent nozzles (nozzle pitch). By forming a molten filament having a large loop diameter, not only the molten filament discharged from the adjacent nozzle but also the molten filament discharged from the non-adjacent nozzle (nozzle at a distance) is fused and bonded. A random loop structure (details will be clarified later) found in a general filament three-dimensional conjugate is formed.

FIG. 27 is a schematic diagram conceptually showing the relationship between the diameter of the molten filament and the loop diameter, and FIG. 28 is a schematic diagram conceptually showing the relationship between the temperature and viscosity of the molten filament and the loop diameter. In FIG. 27, A1 is a filament loop formed when the diameter of the molten filament is 0.8 mm, A2 is a filament loop formed when the diameter of the molten filament is 1.2 mm, and A3 is a molten filament. The filament loops formed when the diameter is 2 mm are conceptually shown. Further, in FIG. 28, B1 is a filament loop formed when the temperature of the molten filament is relatively high (when the viscosity is relatively low), and B2 is when the temperature of the molten filament is low (viscosity is relatively low) as compared with the case of B1. B3 conceptually shows a filament loop formed when the temperature of the molten filament is low (when the viscosity is high) as compared with the case of B2.

Although the loop diameter of the molten filament is not constant, as shown in FIGS. 27 and 28, the average loop diameter is adjusted by the flexibility of the molten filament when it is put into the cooling water (adjusted by the heating temperature of the molten filament). It can be adjusted by changing the parameters of the melt viscosity) or the thickness of the melt filament (the diameter of the melt filament adjusted by the diameter of the nozzle opening).

When the heating temperature is raised and the melt viscosity of the filament is lowered, the loop diameter of the melt filament can be reduced, and when the diameter of the melt filament is increased, the loop diameter of the melt filament can be increased. On the contrary, it is also possible to increase the melt viscosity of the filament to increase the loop diameter, or to decrease the diameter of the molten filament to reduce the loop diameter.

FIG. 29 is a schematic diagram conceptually showing the relationship between the take-back speed ratio and the loop pitch. The "loop pitch" is the distance traveled during one rotation of the loop of the molten filament, and the "take-up speed ratio" is the take-up speed V2 of the filament three-dimensional conjugate with respect to the falling speed V1 of the molten filament into the cooling water. It is a ratio (= V2 / V1) of (conveying speed of the transport conveyor). In FIG. 29, C1 is a filament loop formed when the take-up speed ratio is 20%, C2 is a filament loop formed when the take-back speed ratio is 15%, and C3 is a take-back speed ratio. Filament loops formed at 10% and C4 conceptually represent filament loops formed at a take-up rate ratio of 5%.

As shown in FIG. 29, the loop pitch is substantially proportional to the take-up speed ratio, and the smaller the take-back speed ratio, the smaller the loop pitch. However, when the take-up speed ratio becomes smaller than a certain value, a loop diameter or loop pitch that is significantly smaller than the loop diameter or loop pitch estimated by the above proportional relationship is formed, and at the same time, a cylindrical filament loop is formed. The applicant has found that a honeycomb loop structure laminated in parallel is formed.

The difference between the random loop structure and the honeycomb loop structure will be described with reference to FIGS. 30 and 31. FIG. 30 is a top view conceptually showing the difference between the random loop structure and the honeycomb loop structure, and FIG. 31 is a side view conceptually showing the difference between the random loop structure and the honeycomb loop structure. 30 (A) and 30 (A) show a random loop structure, and FIGS. 30 (B) and 30 (B) show a honeycomb loop structure.

The formation mechanism of the honeycomb loop structure is as follows. When the take-up speed ratio becomes smaller than a certain value, a cylindrical wall (actually, the porosity is high) that suppresses the expansion of the loop of the adjacent molten filament is formed, and it is estimated that the loop diameter becomes smaller. As the loop diameter becomes smaller, the molten filament regulated to spread in the horizontal direction forms a loop within the limited loop diameter, so that the loop pitch becomes shorter. It is presumed that the loop diameter is finally reduced until the loop diameters of the plurality of molten filaments are substantially equal to the nozzle pitch, and as a result, a honeycomb loop structure having a uniform loop shape is formed. Normally, the loop diameter of the random loop structure is larger than the nozzle pitch, but the loop diameter of the honeycomb loop structure is substantially the same as the nozzle pitch. However, even if the honeycomb loop structure is once formed, the loop diameter becomes large again due to some trigger, and the loop pitch becomes long accordingly, and it is easy to return to the random loop structure.

Further, in the vicinity of the surface layer in the thickness direction, the shape of the filament loop tends to be a random loop structure, so that it is difficult to form a honeycomb loop structure. In the random loop structure, the filament density may be significantly reduced locally, or a region where the filament bond point density is extremely low may be formed. However, by forming a high-density surface layer by increasing the filament density and the filament bond point density of the surface layer, the drawbacks of such a random loop structure can be compensated for, and at the same time, a soft sleeping comfort can be obtained by increasing the loop diameter. It is possible to take advantage of the random loop structure.

FIG. 32 is a schematic view conceptually showing a multilayer multi-row honeycomb loop structure. By further reducing the take-up speed ratio or further raising the heating temperature of the molten filament to lower the melt viscosity, the honeycomb loop structure is preferentially formed. Under the condition that the honeycomb loop structure is preferentially formed, the multilayer multi-row honeycomb loop structure is formed. If the temperature of the molten filament is set too high (the melt viscosity is reduced), a loop having a loop diameter smaller than the nozzle pitch is formed, which makes it difficult to form a honeycomb loop structure.

In the present application, the "multi-layered multi-row honeycomb loop structure" indicates a structure in which cylindrical filament loops (honeycomb loop structure) having a loop diameter substantially equal to the nozzle pitch are laminated in three layers and three rows or more. The number of loops arranged continuously in the thickness direction of the dimensional bond is defined as a layer, and the number of loops arranged continuously in the width direction of the filament three-dimensional bond is defined as a column. The number of layers to be laminated is not particularly limited, but is usually limited to 20 layers or less depending on the thickness of the filament three-dimensional bond.

In the filament three-dimensional bond in which the high-density surface layer is formed, multiple layers are arranged in the vicinity of both ends in the thickness direction (specifically, within 2 cm from the end) of the filament three-dimensional bond in which the high-density surface layer is formed. It is not necessary that the honeycomb loop structure is formed, and it is sufficient that the honeycomb loop structure is formed at the center of the filament three-dimensional bond in the thickness direction. The form of the multi-layered multi-row honeycomb loop structure includes a form of being continuously formed (a multi-layered multi-row honeycomb loop structure continues from end to end in the length direction of the filament three-dimensional bond) or intermittently. Examples thereof include a form in which a multi-layered multi-row honeycomb loop structure and a random loop structure are alternately formed in the length direction of the filament three-dimensional bond.

The multi-layered multi-row honeycomb loop structure is more likely to be formed as the take-up speed ratio is smaller. Therefore, in order to stably form the multi-layered multi-row honeycomb loop structure, the take-up speed ratio is temporarily slowed down to stably form the multi-layered multi-row honeycomb loop structure, and then a desired repulsive force (filament) is formed. A method of gradually increasing the pick-up speed ratio until the pick-up speed ratio is obtained (density) is preferable. As a result, a multi-layered multi-row honeycomb loop structure is formed more stably than when the production is started without changing the take-up speed ratio.

The falling speed required for calculating the take-up speed ratio can be marked by spraying a colorant (preferably pigment powder) on the falling molten filament and directly measuring the speed. However, in the present embodiment, the falling speed can be measured. Uses a glass rod coated with a colorant powder to attach the colorant to the molten filament falling from the nozzle, and then again attaches the colorant to the molten filament 10 seconds later and discharges the colorant in 10 seconds. From the length of the molten filament, the falling speed of the molten filament per second was calculated.

III. Filament three-dimensional coupling FIG. 33 is a schematic cross-sectional view of the filament three-dimensional coupling 500 according to the present embodiment. The filament three-dimensional conjugate 500 can be manufactured by the manufacturing apparatus 401 described above. Further, FIG. 34 is a photograph of a cross section of an embodiment of the filament three-dimensional conjugate 500. Further, FIG. 35A is a photograph taken by cutting out a portion of the honeycomb loop structure (honeycomb loop structure layer 500c) in the filament three-dimensional conjugate. Further, FIG. 35B is a photograph taken by cutting out a portion of the random loop structure (random loop structure layer 500b) in the filament three-dimensional conjugate. It should be noted that these photographs are appropriately image-processed so that the contents can be easily understood.

The filament three-dimensional bond 500 is formed on the high-density surface layer 500a having a relatively high filament density formed at both ends in the thickness direction and adjacent to the high-density surface layer 500a on the central portion side in the thickness direction. It has a random loop structure layer 500b and a honeycomb loop structure layer 500c formed adjacent to the random loop structure layer 500b on the central portion side in the thickness direction.

That is, in the filament three-dimensional bond 500, the high-density surface layer 500a, the random loop structure layer 500b, and the honeycomb loop structure layer 500c are formed adjacent to each other in order from both ends in the thickness direction toward the center. The thickness (thickness direction dimension) of the filament three-dimensional conjugate 500 is not particularly limited. As an example, the thickness of the honeycomb loop structure layer 500c is set to about 1/2 of the thickness of the filament three-dimensional bond 500, and the thickness of the random loop structure layers 500b on both sides thereof is set to the thickness of the filament three-dimensional bond 500, respectively. It can be about 1/4 of the thickness of.

As described above, the high-density surface layer 500a is formed by utilizing the inclined surfaces 422a1 and 422b1. That is, the molten filaments (molten filaments near both ends in the thickness direction of the molten filament group 402) discharged from the nozzles 417a near both ends in the front-rear direction are received by the inclined surfaces 422a1 and 422b1 and then are closer to the center in the thickness direction. Since it is guided between the vertical faces 422a2 and 422b2, the molten filaments at both ends are densified. By cooling and solidifying this portion with the cooling water of the cooling water tank 421, a high-density surface layer 500a having a high density is formed. The high-density surface layer 500a has a higher filament density than the random loop structure layer 500b and the honeycomb loop structure layer 500c, and by forming such a layer on the surface, the filament three-dimensional bond 500 loses its shape as much as possible. It can be suppressed.

The random loop structure layer 500b is a region (layer) in which the random loop structure is mainly formed, and is a cross section having the transport direction at the time of manufacturing as the normal direction (a cross section including the thickness direction and the width direction of the filament three-dimensional bond). This is a region in which a plurality of filament loops having a loop diameter substantially equal to the nozzle pitch are not formed adjacent to each other in the “horizontal cross section”). For example, in the random loop structure layer 500b, the occupied area ratio occupied by the random loop structure, that is, the ratio (= S2 / S1) of the total area S2 occupied by the random loop structure to the total area S1 of the horizontal cross section is 50% or more. is there.

The honeycomb loop structure layer 500c is a region (layer) in which a multi-layered multi-row honeycomb loop structure is mainly formed, and a plurality of filament loops having a loop diameter substantially equal to the nozzle pitch are formed adjacent to each other in a horizontal cross section. This is the area where you are.

Examples of the method for discriminating the multi-layered multi-row honeycomb loop structure include a method for discriminating whether or not a filament loop having a loop diameter substantially equal to the nozzle pitch is formed in the horizontal cross section. The ratio of the occupied area occupied by the filament loop having such a loop diameter, that is, the ratio of the total area S4 occupied by the filament loop having a loop diameter substantially equal to the nozzle pitch with respect to the total area S3 in the horizontal cross section (= S4 / S3). The larger the value, the more it is possible to suppress the occurrence of the phenomenon that the bond point density is significantly reduced locally, and the effect based on the honeycomb loop structure (the phenomenon that the bond point density is locally significantly reduced is unlikely to occur, so that it is extended. Even if a force is applied, the effect of making it difficult for the filaments to break together) can be obtained.

The occupied area ratio for sufficiently obtaining this effect is preferably 50% or more and 100% or less, and more preferably 80% or more and 100% or less. In the honeycomb loop structure layer shown in FIG. 34, the occupied area ratio of the multi-layered multi-row honeycomb loop structure is about 80%, and the occurrence of places where the bond point density is extremely low is not observed, and the filament density is stable. And the bond point density is obtained.

As described above, in the filament three-dimensional bond 500 according to the present embodiment, a plurality of filaments are three-dimensionally fused and bonded, and the honeycomb loop structure layer 500c is formed in a region including a central portion in the thickness direction. Has been done. Therefore, even when a local load as shown in FIG. 37 is applied, the filament bond is less likely to be broken at the central portion in the thickness direction as compared with the case where the central portion in the thickness direction is formed with a random loop structure.

Further, in the filament three-dimensional bond 500, the random loop structure layer 500b and the honeycomb loop structure layer 500c are formed in order from the end side to the center side in the thickness direction. Therefore, the filament bond is hard to break in the central portion in the thickness direction, and the random loop structure layer 500b provides a soft sleeping comfort. Even if the random loop structure layer 500b is not formed, the effect that the filament bond by the honeycomb loop structure layer 500c is hard to be broken is still obtained.

In manufacturing the filament three-dimensional coupler 500 using the manufacturing apparatus 401, for example, the manufacturing conditions and the like so that the honeycomb loop structure is formed in the central portion in the thickness direction of the filament three-dimensional coupler (the above-mentioned take-up speed ratio). Etc.) may be adjusted to form a three-dimensional filament conjugate. In this way, the honeycomb loop structure layer 500c is formed in the central portion in the thickness direction, and the high-density surface layers 500a are formed at both ends in the thickness direction by the action of the inclined surfaces 422a1 and 422b1.

Further, even if the honeycomb loop structure is formed in the central portion in the thickness direction, the shape of the filament loop tends to be a random loop structure in the vicinity of the surface layer in the thickness direction. Therefore, the honeycomb loop structure layer 500c and the high-density surface layer A random loop structure layer 500b is formed between the 500a. As a result, a filament three-dimensional bond 500 in which the high-density surface layer 500a, the random loop structure layer 500b, and the honeycomb loop structure layer 500c are sequentially formed adjacent to each other from both ends in the thickness direction toward the center can be obtained. become.

As a method for manufacturing the filament three-dimensional conjugate 500, a honeycomb loop structure layer is easily formed in the vicinity of the central portion in the thickness direction, and a random loop structure layer is easily formed in the vicinity of both ends in the thickness direction. A part of the manufacturing conditions may be positively changed between the vicinity of the central portion and the vicinity of both ends. For example, regarding the configuration of the nozzle portion 417, the random structure layer is formed by relatively increasing the nozzle diameter corresponding to the vicinity of both ends in the thickness direction without changing the nozzle pitch and increasing the loop diameter in the vicinity of both ends in the thickness direction. It may be easy to form.

IV. In the nozzle portion 417 of the nozzle portion manufacturing apparatus 401 according to another embodiment, the characteristics of each filament constituting the filament three-dimensional coupling can be adjusted by changing the size of the nozzle 417a, the nozzle pitch, and the like. .. As an example of the nozzle in this case (another embodiment of the nozzle portion 417 shown in FIG. 26), the nozzle portion 517 shown in FIG. 36 (plan view) will be described. The nozzle portion 517 is a substantially rectangular parallelepiped metal thick plate in which a plurality of nozzles 517a (circular openings) are formed, and is provided below the die 412 which is the most downstream portion of the guide flow path 412a.

As a plurality of nozzles 517a (nozzle group) formed in the nozzle portion 517, a large diameter nozzle group 517a1 having a relatively large nozzle diameter and a nozzle pitch and a small diameter nozzle group 517a2, 517a3 having a relatively small nozzle diameter and a nozzle pitch. Is provided. The large-diameter nozzle group 517a1 is formed near the central portion in the thickness direction (mainly the region where the honeycomb loop structure layer is formed), and the small-diameter nozzle group 517a2 and 517a3 are formed near both ends in the thickness direction (mainly the random loop structural layer is formed). Areas) are provided in each area. In the large diameter nozzle group 517a1, the nozzle diameter is set to 1.5 mm and the nozzle pitch is set to 15 mm, respectively, and in the small diameter nozzle group 517a2 and 517a3, the nozzle diameter is set to 1 mm and the nozzle pitch is set to 10 mm, respectively. ..

Also in the present embodiment using the manufacturing apparatus 1 to which the nozzle portion 517 is applied, the high-density surface layer 500a, the random loop structure layer 500b, and the honeycomb loop structure layer 500c are adjacent to each other in order from both ends in the thickness direction toward the center. The filament three-dimensional conjugate 500 (see FIG. 33) formed in the above is still obtained. Therefore, it is possible to enjoy each effect by providing each of these layers (500a to 500c).

Further, in the present embodiment, since the nozzle pitch of the small diameter nozzle group 517a2 and 517a3 is smaller than that of the large diameter nozzle group 517a1, the number density of filaments (the number of filaments per unit volume) of the random loop structure layer 500b is a honeycomb. It is larger than the number of filaments of the loop structure layer 500c. Therefore, it is possible to prevent the filament bond point density from becoming extremely low in the vicinity of the high-density surface layer 500a where the random loop structure layer 500b is located.

If the number density of the filaments of the random loop structure layer 500b is simply increased, the filament density of the random loop structure layer 500b may become too high, and the repulsive force may become excessively high. In this respect, in the present embodiment, since the nozzle diameter of the small diameter nozzle group 517a2 and 517a3 is smaller than that of the large diameter nozzle group 517a1, the filament diameter of the random loop structure layer 500b is the diameter of the filament of the honeycomb loop structure layer 500c. It becomes smaller. Therefore, it is possible to prevent the filament density from becoming too high in the vicinity of the high-density surface layer 500a where the random loop structure layer 500b is located.

Although the fourth embodiment of the present invention has been described above, the configuration of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention. That is, it should be considered that the above embodiment is an example in all respects and is not restrictive. The technical scope of the present invention is shown not by the description of the above embodiment but by the scope of claims, and it is understood that the meaning equivalent to the scope of claims and all modifications belonging to the scope are included. Should be.
[Perforated sheet using three-dimensional filament conjugate]

FIG. 38 is a schematic view showing an example of the porous sheet 100B using the filament three-dimensional bond of the fourth embodiment described above, and shows a cross section of the porous sheet 100B along the thickness direction. In FIG. 38, a part of the porous sheet 100B is extracted and shown. The perforated sheet 100B is provided on the disposable diaper 300. The structure of the disposable diaper 300 is the same as that of the disposable diaper 300 according to the first to third embodiments, except that the porous sheet 100B is used instead of the porous sheet 100.

The porous sheet 100B using the filament three-dimensional bond of the fourth embodiment is formed of a filament three-dimensional bond formed by fusion bonding and cooling solidification of the molten filament group. Also in the fifth to eleventh embodiments described below, the sheet using the filament three-dimensional bond is a sheet of the filament three-dimensional bond formed by fusion bonding and cooling solidification of the molten filament group. is there. Further, in the present specification, individual filaments included in the molten filament group forming the filament three-dimensional conjugate are referred to as "molten filaments".

The perforated sheet 100B is provided with a structure corresponding to the through hole 21d of the honeycomb pattern structure. As described above, in the filament three-dimensional conjugate of the fourth embodiment, the molten filament forms a honeycomb loop structure. In the perforated sheet 100B, the cylindrical space surrounded by the molten filament F1 having a honeycomb loop structure becomes the through hole 21d. That is, the through hole 21d of the perforated sheet 100B is formed by the molten filament F1 wound in a loop along the thickness direction of the sheet 100B. Further, the molten filament F1 wound in a loop shape forms a partition wall 30d for partitioning the through hole 21d. The loop diameter of the molten filament F1 is the diameter of the through hole 21d.

There is a gap in the thickness direction between the loops of the molten filament F1. Therefore, there are many gaps in the partition wall 30d. These gaps improve the permeability of the liquid component (moisture) contained in the urine and loose stool taken into the through hole 21d.

The molten filament F1 has a spring property that contracts along the thickness direction with respect to a force applied from the skin surface side and recovers when the force is removed. The molten filament F1 contracts as it is pushed from the skin surface side to the non-skin surface side, narrowing the gap between the loops, and gradually becomes less likely to contract and deform. In this specification, the fact that the repulsive force of the molten filament is small with respect to the force applied from the skin surface side is expressed as "the springiness of the molten filament is small".

In the state where the weight of the wearer is not applied to the perforated sheet 100B, the inter-loop spacing of the molten filament F1 becomes wider than in the state where the weight is applied. Therefore, the gap in the partition wall 30d becomes wide. Therefore, the structure is such that moisture can be easily moved in the direction (lateral direction) intersecting the axis of the through hole 21d. In addition, since the gap forms a ventilation path, the ventilation is also good.

When the weight of the wearer is applied to the perforated sheet 100B, the molten filament F1 forming each through hole 21d is compressed along the thickness direction. Therefore, the gap in the partition wall 30d is narrowed, and the liquidtightness of the partition wall 30d is improved. Therefore, the through hole 21d improves the stool passage performance for moving watery stools such as defecation loose stools from the skin surface side to the non-skin surface side (in the vertical direction).

In a perforated sheet in which a plurality of through holes for allowing loose stool to permeate are formed, it is an issue to improve the permeability of water such as urine and loose stool in order to improve the holding performance of loose stool.

In this respect, in the porous sheet 100B using the filament three-dimensional conjugate, the through holes 21d are formed by the molten filament F1 wound in a loop shape. Therefore, when the weight of the wearer is not applied, the inter-loop spacing of the molten filament F1 becomes wide and the water permeability is improved. Further, when the body weight is added, the liquidtightness of the partition wall 30d is improved. Therefore, the through hole 21d improves the stool passage performance for moving watery stools such as defecation loose stools from the skin surface side to the non-skin surface side (in the vertical direction).
[Fifth Embodiment]

Next, the sheet 100C for an absorbent article according to the fifth embodiment will be described with reference to FIG. 39. FIG. 39 is a schematic view showing an example of loop diameters D1 and D2 of the molten filament F2 forming the sheet 100C according to the fifth embodiment. The sheet 100C according to the fifth embodiment is a sheet using the same filament three-dimensional conjugate as the above-mentioned porous sheet 100B. In the fifth embodiment, as shown in FIG. 39, the loop diameter D1 on the skin surface side of the molten filament F2 is smaller than the loop diameter D2 on the non-skin surface side.

In the molten filament F2, the smaller the loop diameter, the smaller the springiness of the molten filament F2 tends to be. In the sheet 100C, since the loop diameter is small on the skin surface side of the molten filament F2, the skin contact when worn becomes soft. When the body weight is applied to the sheet 100C, the molten filament F2 contracts toward the non-skin surface side. Since the loop diameter gradually increases toward the non-skin surface side, the springiness gradually increases. By forming a structure in which the springiness is non-uniform on the skin surface side and the non-skin surface side in this way, the wearing feeling is improved.

By appropriately adjusting the filament three-dimensional bond manufacturing apparatus 401 (see FIGS. 23 to 25), a porous sheet 100C in which the loop diameter D1 on the skin surface side is smaller than the loop diameter D2 on the non-skin surface side can be formed.

In the conventional sheet for absorbent articles, the springiness is uniform in any region in the thickness direction, so there is room for improvement in wearing comfort. On the other hand, in the sheet 100C, the loop diameter D1 on the skin surface side is made smaller than the loop diameter D2 on the non-skin surface side, so that the skin feels soft when worn and the wearing feeling is improved.
[Sixth Embodiment]

Next, the configuration of the porous sheet 100D according to the sixth embodiment will be described with reference to FIG. 40. FIG. 40 is a schematic view showing an example of loop pitches P1 and P2 of the molten filament F3 forming the sheet 100D according to the sixth embodiment. The sheet 100D according to the sixth embodiment is a sheet using the same filament three-dimensional conjugate as the above-mentioned porous sheet 100B. In the sixth embodiment, as shown in FIG. 40, the loop pitch P1 on the skin surface side of the molten filament F3 is larger than the loop pitch P2 on the non-skin surface side.

In the molten filament F3, the springiness of the molten filament F3 tends to decrease as the loop pitch increases. In the sheet 100D, since the loop pitch is large on the skin surface side of the molten filament F3, the skin contact during wearing becomes soft. When the body weight is applied to the sheet 100D, the molten filament F3 contracts toward the non-skin surface side. Since the loop pitch gradually decreases toward the non-skin surface side, the springiness gradually increases. By forming a structure in which the springiness is non-uniform on the skin surface side and the non-skin surface side in this way, the wearing feeling is improved.

By appropriately adjusting the filament three-dimensional bond manufacturing apparatus 401 (see FIGS. 23 to 25), it is possible to form a porous sheet 100D in which the loop pitch P1 on the skin surface side is larger than the loop pitch P2 on the non-skin surface side.

Since the springiness was uniform in any region in the thickness direction, there was room for improvement in wearing comfort. On the other hand, in the sheet 100D, the loop pitch P1 on the skin surface side of the molten filament F3 is made larger than the loop pitch P2 on the non-skin surface side, so that the skin contact during wearing can be softened and the wearing feeling is improved. ..
[Seventh Embodiment]

Next, the configuration of the porous sheet 100E according to the seventh embodiment will be described with reference to FIG. 41. FIG. 41 is a schematic cross-sectional view of the porous sheet 100E cut in the thickness direction, and a part thereof is extracted and shown. In the perforated sheet 100E according to the seventh embodiment, the through hole 21e is formed in a tapered shape in which the diameter on the skin surface side is narrower than the diameter on the non-skin surface side. The through hole 21e in FIG. 41 is formed in a truncated cone shape in which the skin surface side is narrower than the non-skin surface side.

In the conventional perforated sheet, since the through holes have a cylindrical shape with the same diameter on the skin surface side and the non-skin surface side, when watery stools such as defecation loose stools pass from the skin surface side to the non-skin surface side. And, the stool passage performance becomes uniform in the case of returning from the non-skin surface side. On the other hand, since the through hole 21e is narrower on the skin surface side than on the non-skin surface side, it is a stool when returning from the non-skin surface side as compared with the case where the through hole 21e passes from the skin surface side to the non-skin surface side. Passing performance is suppressed. Therefore, the reversion prevention performance of loose stool is improved.
[Eighth Embodiment]

Next, with reference to FIG. 42, the configuration of the sheet 100F for the absorbent article according to the eighth embodiment will be described. FIG. 42 is a schematic view of a sheet 100F for an absorbent article placed on a flat surface with the skin surface side facing upward as viewed from the side surface. In the seat 100F, the end 101F on the front body 300A side (ventral side of the wearer) and the end 103F on the back body 300C side (dorsal side of the wearer) are formed to be thicker than the region of the inseam 300B. There is. When the present sheet 100F is applied to the disposable diaper 300, the configuration of the disposable diaper 300 is the same as that of the disposable diaper 300 according to the first to third embodiments, except that the sheet 100F is used instead of the perforated sheet 100.

When the sheet 100F is formed of a sheet using the filament three-dimensional bond of the fourth embodiment, the sheet 100F can be formed by appropriately adjusting the filament three-dimensional bond manufacturing apparatus 401 (see FIGS. 23 to 25). Can be formed. That is, in the nozzle portion 417, the nozzles corresponding to the respective regions of the end portion 101F and the end portion 103F are adjusted to adjust the fiber deposition thickness, the springiness, and the like. As a result, the ends 101F and 103F of the sheet 100F can be formed thicker than other regions.

When the sheet 100F is formed of a sheet using the filament three-dimensional bond of the fourth embodiment, it may be a sheet having a honeycomb loop structure or a sheet having a random loop structure. Further, the sheet may have both a honeycomb loop structure and a random loop structure.

Further, the sheet 100F may be a perforated sheet having a plurality of through holes penetrating in the thickness direction.

Since the conventional sheet for absorbent articles has a uniform thickness in the longitudinal direction, there is room for improvement in the fit when worn. On the other hand, in the seat 100F, the end 101F on the front body 300A side and the end 103F on the back body 300C side are thickened, so that the seat 100F is placed on the ventral side and the back side of the wearer when worn. It will be easier to hit. Therefore, the fit is improved.
[Ninth Embodiment]

Next, the configuration of the sheet 100G according to the ninth embodiment will be described with reference to FIGS. 43 and 44. Sheet 100G is applied to the disposable diaper 300. The structure of the disposable diaper 300 is the same as that of the disposable diaper 300 according to the first to third embodiments, except that the sheet 100G is used instead of the porous sheet 100. FIG. 43 shows the top sheet 51 and the sheet 100G extracted from the development view of the disposable diaper 300 similar to that of FIG. Further, in FIG. 43, the illustration of the passing portion 52 of the top sheet 51 is omitted. FIG. 44 is a schematic view of the sheet 100G placed on a flat surface with the skin surface side facing upward as viewed from the side surface.

As shown in FIGS. 43 and 44, the sheet 100G is directed toward the wearer's skin surface in a region (referred to as "urethral meatus contact region") in contact with the wearer's urethral meatus when the disposable diaper 300 is worn on the skin surface side. It has a convex portion 105 that is raised to.
The urethral meatus contact area is set at the center of the sheet 100G in the width direction at a position closer to the front body 300A of the inseam 300B. By having the convex portion 105, the urethral meatus contact region becomes thicker than other regions.

The sheet 100G may be a perforated sheet for taking in loose stools having a plurality of through holes for taking in loose stools similar to the perforated sheet 100 and the like.

Since the thickness of the conventional sheet for absorbent articles was uniform, there was room for improvement in the fit when worn. On the other hand, in the sheet 100G, the urethral portion of the wearer becomes thicker when worn by having the convex portion 105 in the urethral meatus contact region. Therefore, the fit in the urethral meatus contact area is improved.
[10th Embodiment]

Next, the configuration of the sheet 100H according to the tenth embodiment will be described with reference to FIGS. 45 and 46. Sheet 100H is applied to the disposable diaper 300. The structure of the disposable diaper 300 is the same as that of the disposable diaper 300 according to the first to third embodiments, except that the sheet 100H is used instead of the porous sheet 100. FIG. 45 shows the top sheet 51 and the sheet 100H extracted from the development view of the disposable diaper 300 similar to that of FIG. Further, in FIG. 45, the illustration of the passing portion 52 of the top sheet 51 is omitted. FIG. 46 is a schematic view of the sheet 100H placed on a flat surface with the skin surface side facing upward as viewed from the side surface.

As shown in FIGS. 45 and 46, the sheet 100H has a recess 107 in a region where the wearer's anus contacts (referred to as an “anal contact region”) when the disposable diaper 300 is worn. The recess 107 is a portion of the sheet 100H on the skin surface side that is more depressed than the other regions.

The anal contact area is set in the central portion of the sheet 100H in the width direction and extends from the inseam 300B to the back body 300C. By having the recess 107, a space capable of accommodating stool is formed in the anal contact area on the skin surface of the sheet 100H.

With the conventional sheet having a uniform thickness, the defecation stool may remain on the sheet and come into contact with the skin. On the other hand, in the sheet 100H, since the recess 107 is provided in the anus contact region, the defecation stool can be stored in the recess and kept away from the skin. Therefore, comfort is improved.
Further, when the sheet 100H is composed of a perforated sheet for taking in loose stool having a through hole for taking in loose stool, the solid stool is accommodated in the recess 107 to keep it away from the skin, and the watery stool is taken into the through hole. Can be done. Therefore, comfort is improved for any type of stool.

With respect to the ninth and tenth embodiments described above, the sheets 100G and 100H may be formed of a sheet utilizing the filament three-dimensional conjugate of the fourth embodiment. In that case, the sheets 100G and 100H can be formed by appropriately adjusting the filament three-dimensional conjugate manufacturing apparatus 401 (see FIGS. 23 to 25). That is, in the nozzle portion 417, the nozzles corresponding to the respective regions of the convex portion 105 and the concave portion 107 are adjusted to adjust the fiber deposition thickness, the springiness, and the like. As a result, the convex portion 105 and the concave portion 107 can be formed.

Further, when the sheets 100G and 100H are formed of the sheets using the filament three-dimensional conjugate of the fourth embodiment, they may be sheets having a honeycomb loop structure or sheets having a random loop structure. May be good. Further, the sheet may have both a honeycomb loop structure and a random loop structure.
The sheet 100H may be a perforated sheet for taking in loose stools having a plurality of through holes for taking in loose stools similar to the perforated sheet 100 and the like.
[Eleventh Embodiment]

Next, the configuration of the disposable diaper 300 according to the eleventh embodiment will be described. In the disposable diaper 300 according to the eleventh embodiment, a sheet using the filament three-dimensional bond of the fourth embodiment is provided between the top sheet 51 and the absorber 40. This sheet is a sheet-like member that diffuses urine over the entire area of the absorber 40 in a plan view, and can be positioned as a second sheet as a urine diffusion layer. The configuration of the disposable diaper 300 according to the eleventh embodiment is the same as that of the disposable diaper 300 according to the first to third embodiments, except that a sheet using a three-dimensional filament conjugate is used instead of the porous sheet 100. ..

Both a sheet using a three-dimensional filament conjugate as a urine diffusion layer and a perforated sheet 100 for taking in loose stool may be provided between the top sheet 51 of the disposable diaper 300 and the absorber 40. In that case, the second sheet provided between the top sheet 51 and the absorber 40 is a perforated sheet 100 for taking in loose stool as a first second sheet and a sheet (urine diffusion layer) as a second sheet. It has two types of seats.

The conventional second sheet is often formed of a non-woven fabric in which fibers having a relatively large diameter are bonded with an adhesive in order to exhibit urine diffusion performance. However, in the configuration in which this non-woven fabric is used for the second sheet, there is a concern that the touch on the top sheet side may be reduced due to the thickness of the fiber diameter, the use of an adhesive, and the like. Therefore, for example, it is necessary to devise a thicker top sheet in order to suppress a decrease in touch on the top sheet side.

On the other hand, when a sheet using a three-dimensional filament composite is used as a second sheet (urine diffusion layer), it feels better to the touch than when a non-woven fabric made of fibers having a large diameter is used (the corners of the fibers are sharp). And the use of adhesives can be minimal (or non-use). In addition, the molten filament has a spring property in the sheet using the filament three-dimensional conjugate. From these, it is not necessary to give the top sheet 51 a function for suppressing a decrease in touch. Therefore, the range of choices for the top sheet 51 is widened. For example, the top sheet 51 can be made thinner, or a sheet having excellent functionality such as water permeability can be used for the top sheet 51.

Hereinafter, the present invention will be specifically described with reference to examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the present invention is not limited to the following examples.

[Evaluation method]
The perforated sheets obtained from the following Examples and Comparative Examples were evaluated for their physical properties according to the following evaluation methods and evaluation criteria.

<Compression strength>
To measure the maximum load, cut out a test piece of 5 cm square in the surface direction and 5 mm in the thickness direction from the perforated sheet obtained in each example and comparative example, and flatten it on a universal testing machine (Instron type 5982). A metal plate was set as an indenter so as to be parallel, the compressive load was measured at a speed of 5 mm / min, and the point at which the maximum load was obtained was defined as the compressive strength.

<Measurement of compression strength per density>
A test piece of 5 cm square in the plane direction and 5 mm in the thickness direction was cut out from the perforated sheets obtained in each Example and Comparative Example to obtain a sample for density measurement.
Then, the weight was measured with a precision balance (ML304T manufactured by METTLER TOLEDO), and the density was calculated.
Next, the compressive strength per density was calculated by dividing the compressive strength of each test piece by the density.

<Porosity>
The perforated sheets obtained in Examples and Comparative Examples were photographed with a camera in a plan view to obtain a plan image. This planar image was image-analyzed to determine the total area of the through holes contained in the image and the area of the entire image. Furthermore, the percentage of the total area of the through holes divided by the total area was calculated. Further, this procedure was performed 5 times by changing the shooting position by the camera, and the average value of the calculated values of the 5 times was obtained as the porosity.

<Capture and retention performance of loose stool>
Artificial loose stool composition (weight)
Bentonite 5.0%
Mayonnaise (commercially available) 5.0%
The rest is water (adjusted to a viscosity of 200 cps)
Pseudo-loose stool (hereinafter, also referred to as "artificial loose stool") imitating loose stool was produced.
The perforated sheets obtained in each Example and Comparative Example were placed on an absorber placed on the back sheet to obtain samples for evaluating the flow distance and the amount of reversion.

(Loose stool flow distance)
In the method of measuring the flow distance, an evaluation sample is placed on a slope having an inclination angle of 30 °. 10 ml of artificial loose stool is pipetted onto the evaluation sample at a rate of 10 ml / sec. At this time, the distance between the artificial loose stool dropping position and the most advanced position where the artificial loose stool reaches along the slope 30 seconds after the dropping is defined as the loose stool flow distance L.
From the measurement results, the flow distance of loose stool was determined according to the following criteria.
◎ (excellent): Flow distance value is 5 cm or less ○ (Good): Flow distance value is more than 5 cm and 10 cm or less △ (possible): Flow distance value is more than 10 cm and 20 cm or less × (impossible): The value of the flow distance is over 20 cm

(Reverse amount test)
The evaluation sample was attached and fixed on a flat plate placed horizontally so that the porous sheet was on top, and 15 cc of artificial loose stool was dropped from a height of 1 cm above the center of the absorber of the sample using a pipette. (Dripping rate 2 cc / sec). When 3 minutes have passed from the end of dropping, place 10 filter papers in the dropping place, place a 1 kg weight (area of the filter paper contact surface 100 cm ² ) on it, and leave it for 1 minute. The weight of the filter paper before and after that is measured, and the weight obtained by subtracting the weight of the filter paper before the test from the weight of the filter paper after the test is defined as the reversion amount. From the measurement results, the amount of reversion of loose stool was determined according to the following criteria.
◎ (excellent): The value of the reversion amount is 1 g or less ○ (good): The value of the reversion amount is more than 1 g and 5 g or less △ (possible): The value of the reversion amount is more than 5 g and 10 g or less × (impossible): The value of the amount of reversion exceeds 10 g

[Example 1]
A honeycomb is formed from a paper sheet having a thickness of 90 μm, a basis weight of 64 g / m ² , and an apparent density of 0.7 g / cm ^3. A node line of the solvation adhesive is applied to the surface of the paper sheet with a width of 3 mm and a pitch of 12 mm to remove the solvent.
A sheet having this adhesive node line is cut to a length of 500 mm. Multiple sheets are stacked in sequence so that each sheet is offset from the other by half the pitch of its applied adhesive node line. This shift alternates left and right so that the final stack is evenly vertical. The offset amount of the width and pitch of the node line is such that the cell size (hole diameter) becomes 5 mm at the time of expansion. Next, the number of laminated sheets is hot-compressed between the plates at the softening point of the adhesive, and the adhesive node line is allowed to flow. Once the heat is removed, the adhesive solidifies and joins the sheets together at the node line. Next, the joined paper sheets are unfolded in the direction opposite to the stacking direction so as to form cells having an equilateral cross section. Each of the sheets is unfolded between each other so that the sheets are bent along the edges of their joined node lines and the unjoined portions are unfolded in the direction of tension to pull the sheets apart from each other.
Finally, the porous sheet of Example 1 was obtained by applying or impregnating beeswax to make the whole water resistant.
The perforated sheet of Example 1 has a honeycomb pattern structure in which cells have a regular hexagonal shape.
The obtained porous sheet was evaluated. The evaluation results are shown in Table 1.

[Example 2]
A porous sheet was obtained in the same manner as in Example 1 except that the width of the node line in Example 1 was changed to 2 mm and the pitch was changed to 7 mm.

[Example 3]
A porous sheet was obtained in the same manner as in Example 1 except that the width of the node line in Example 1 was changed to 1 mm and the pitch was changed to 3.5 mm.

[Example 4]
A porous sheet was obtained in the same manner as in Example 1 except that the width of the node line in Example 1 was changed to 0.5 mm and the pitch was changed to 2 mm.

[Example 5]
A porous sheet was obtained in the same manner as in Example 1 except that the width of the node line in Example 1 was changed to 1 mm and the pitch was changed to 3.5 mm.

[Example 6]
A porous sheet was obtained in the same manner as in Example 1 except that the width of the node line in Example 1 was changed to 3.5 mm and the pitch was changed to 14 mm.

The obtained porous sheet was evaluated. The evaluation results are shown in Table 1.

[Example 7]
Hot melt adhesive to the top of corrugated paper corrugated to a wavelength (waveform pitch) of 12 mm and a wave height (hole diameter) of 6 mm from a paper sheet having a thickness of 90 μm, a basis weight of 64 g / m ² , and an apparent density of 0.7 g / cm ^3. The agent is applied and the flat sheet and the corrugated sheet are alternately bonded.
Finally, a porous sheet of Example 7 (hereinafter, may be referred to as "corrugated sheet") was obtained by applying or impregnating beeswax to make the whole water resistant.
The porous sheet of Example 7 has a corrugated pattern structure.
The obtained porous sheet was evaluated. The evaluation results are shown in Table 1.

[Example 8]
A porous sheet of Example 8 was obtained in the same manner as in Example 7 except that the corrugated sheet of Example 7 was corrugated to a wavelength of 7 mm and a wave height of 3.5 mm.

[Example 9]
A porous sheet of Example 9 was obtained in the same manner as in Example 7 except that the corrugated sheet of Example 7 was corrugated to a wavelength of 3.6 mm and a wave height of 1.8 mm.

[Example 10]
A porous sheet of Example 10 was obtained in the same manner as in Example 7 except that the corrugated sheet of Example 7 was corrugated to a wavelength of 2 mm and a wave height of 0.9 mm.

[Example 11]
A perforated sheet of Example 11 was obtained in the same manner as in Example 1 except that the width of the node line in Example 1 was changed to 7 mm and the pitch was changed to 28 mm.

The obtained porous sheet was evaluated. The evaluation results are shown in Table 1.

[Example 12]
A porous sheet of Example 12 was obtained in the same manner as in Example 7 except that the corrugated sheet of Example 7 was corrugated to a wavelength of 30 mm and a wave height of 15 mm.

The obtained porous sheet was evaluated. The evaluation results are shown in Table 1.

[Reference Example 1]
Perforation of Reference Example 1 (Reference Example) by forming holes having a diameter of 3 mm in a triangular lattice shape at a pitch of 4 mm on a laminate of 16 polypropylene non-woven fabrics having a basis weight of 70 gsm which has been subjected to a hydrophilic treatment. I got a sheet.
The obtained porous sheet was evaluated. The evaluation results are shown in Table 1.

〔Consideration〕
As shown in Table 1, in the porous sheets of Examples 1 to 6 and 11 having a partition wall constituting the honeycomb pattern structure and the porous sheets of Examples 7 to 10 and 12 having a corrugated pattern structure, the partition wall has a honeycomb pattern. The compressive strength is improved as compared with Reference Example 1, which does not have either the structure of the above structure or the structure of the corrugated pattern and is not composed of the plate-shaped member extending in the thickness direction of the sheet body. , It was hard to be deformed by the load. Therefore, it was possible to hold loose stool even when a load was applied. Further, as can be seen from the comparison with Examples 11 and 12, since the perforated sheets of Examples 1 to 10 have a depth larger than the pore diameter, loose stool can be stably held inside the through holes. It was.

[Additional Notes]
The following appendices are disclosed with respect to each of the above embodiments.
(Appendix 1)
A seat body having a plurality of through holes penetrating in the thickness direction is provided.
The sheet body is a perforated sheet for taking in loose stool, which has a partition wall forming the through hole.

(Appendix 2)
The perforated sheet for taking in loose stool according to Appendix 1, wherein the through hole has a larger depth than the hole diameter.

(Appendix 3)
The perforated sheet for taking in loose stool according to Appendix 1 or 2, wherein the partition wall has a permeation hole that communicates with the adjacent through hole and allows moisture to permeate.

(Appendix 4)
The perforated sheet for taking in loose stool according to any one of Items 1 to 3, wherein a highly absorbent polymer is attached to the partition wall.

(Appendix 5)
The perforated sheet for taking in loose stool according to any one of Supplementary note 1 to 4, wherein the partition wall constitutes a honeycomb pattern structure in which a plurality of polygonal cells are assembled in a plan view.

(Appendix 6)
The cell has a regular hexagonal shape and has a regular hexagonal shape.
The perforated sheet for taking in loose stool according to Appendix 5, wherein the distance between the opposite sides of the cell is 0.1 mm or more and 10 mm or less.

(Appendix 7)
The loose stool take-in according to any one of Supplementary note 1 to 4, wherein the partition wall constitutes a corrugated pattern structure composed of repeating a wavy flute portion and a flat plate-shaped liner portion in a plan view. Perforated sheet for.

(Appendix 8)
The distance between the liner portions is 0.5 mm or more and 10 mm or less.
The perforated sheet for taking in loose stool according to Appendix 7, wherein the corrugated pitch of the flute portion is 0.5 mm or more and 20 mm or less.

(Appendix 9)
The porous sheet for taking in loose stool according to any one of Appendix 1 to 8, wherein the compressive strength per density is 0.5 kPa / (kg / m ^{3) or more.}

(Appendix 10)
The perforated sheet for taking in loose stool according to any one of Supplementary notes 1 to 9 and
An absorbent article provided on one surface side of the perforated sheet for taking in loose stools and comprising an absorber containing a highly absorbent polymer.

(Appendix 11)
The absorbent article according to Appendix 10, further comprising a support sheet provided on one surface side of the perforated sheet for taking in loose stool and absorbing moisture.

(Appendix 12)
The perforated sheet for taking in loose stool according to any one of Supplementary notes 1 to 9 and
An absorbent article, which is provided on one surface side of the perforated sheet for taking in loose stool and includes a support sheet for absorbing moisture.

(Appendix 13)
Item 1 to any one of Appendix 10 to 12, further comprising a top sheet provided on the other surface side of the perforated sheet for taking in loose stool, having water permeability and having a passing portion through which stool passes. The absorbent article described.

(Appendix 14)
A perforated sheet having a plurality of through holes penetrating in the thickness direction.
The porous sheet is formed of a filament three-dimensional bond formed by fusion bonding of molten filament groups and cooling solidification.
A perforated sheet for an absorbent article, wherein the through hole is formed of a molten filament wound in a loop shape along the thickness direction.

(Appendix 15)
It is formed of a three-dimensional filament bond formed by fusion bonding and cooling solidification of the molten filament group.
A sheet for an absorbent article, characterized in that the loop diameter of the molten filament is smaller on the skin surface side than on the non-skin surface side.

(Appendix 16)
It is formed of a three-dimensional filament bond formed by fusion bonding and cooling solidification of the molten filament group.
A sheet for an absorbent article, characterized in that the loop pitch of the molten filament is larger on the skin surface side than on the non-skin surface side.

(Appendix 17)
A seat body having a plurality of through holes penetrating in the thickness direction is provided.
The through hole is a sheet for an absorbent article, characterized in that the skin surface side is narrower than the non-skin surface side.

(Appendix 18)
Longitudinal extension over the front, inseam, and back
A sheet for an absorbent article, characterized in that each end portion in the longitudinal direction is formed to be thicker than the center in the longitudinal direction.

(Appendix 19)
A sheet that extends longitudinally over the front, inseam, and back.
A sheet for an absorbent article, which has a convex portion on the skin surface side of the sheet that is in contact with the urethral meatus of the wearer in a worn state, which is higher than other parts of the sheet.

(Appendix 20)
A sheet that extends longitudinally over the front, inseam, and back.
A sheet for an absorbent article, which has a recessed portion on the skin surface side of the sheet that is in contact with the wearer's anus in a worn state, as compared with other parts of the sheet.

(Appendix 21)
The top sheet placed on the skin side and
With the absorber placed below the top sheet,
A second sheet arranged between the top sheet and the absorber is provided.
The second sheet is formed of a filament three-dimensional bond formed by fusion bonding of molten filament groups and cooling solidification.
An absorbent article characterized in that the molten filament is wound in a loop along the thickness direction of the second sheet.

100 Perforated sheet for taking in loose stool (perforated sheet)
200 Absorbent laminate (laminate)
300 disposable diapers (absorbent articles)
10 Sheet body 10a, 10b End face 11 Cell 21 Through hole 22 Through hole 30 Partition wall 31, 34, 38 Cell wall 32 Base material 33, 37 Adhesive part 35 Flute part 36 Liner part 40 Absorber 41 Absorbent core 42 High absorbency Polymer 43 Fiber Material 44 Wrap Sheet 51 Top Sheet
52 Passing part 54 Support sheet 55 Back sheet 61 Side sheet 62 Cover sheet 70 Gather 80 Thread rubber (stretchable member)
110 Perforated sheet piece 120 Position of urethra 125 Position of anus 401 Manufacturing equipment (filament three-dimensional conjugate manufacturing equipment)
402 Molten filament group 403 Filament three-dimensional conjugate (before cutting)
410 Molten filament supply device 411 Pressurized melting part 411a Cylinder 411b Filament discharge part 412 Die 412a Guide flow path 413 Material input part 414 Screw 415 Screw motor 416 Screw heater 417, 517 Nozzle part 417a, 517a Nozzle 418a to 418f Die heater 420 Dimensional bond forming device 421 Cooling water tank 422 Thickness control part 422a, 422b Receiving plate 424 Conveyor part 424a, 424b Conveyor conveyor 425a to 425h Conveyor roller 500 Filament three-dimensional body (after cutting)
500a High-density surface layer 500b Random loop structure layer 500c Honeycomb loop structure layer 100B Perforated sheet 21d Insertion hole 30d Partition F1 Molten filament 100C Perforated sheet F2 Molten filament 100D Perforated sheet F3 Molten filament 100E Perforated sheet 21e Insertion hole 100F Sheet 101F End 100G Sheet 105 Convex 100H Sheet 107 Convex

Claims (21)

A seat body having a plurality of through holes penetrating in the thickness direction is provided.
The sheet body is a perforated sheet for taking in loose stool, which has a partition wall forming the through hole. The perforated sheet for taking in loose stool according to claim 1, wherein the through hole has a larger depth than the hole diameter. The perforated sheet for taking in loose stool according to claim 1 or 2, wherein the partition wall has a permeation hole that communicates with the adjacent through hole and allows moisture to permeate. The perforated sheet for taking in loose stool according to any one of claims 1 to 3, wherein a highly absorbent polymer is attached to the partition wall. The partition wall constitutes a honeycomb pattern structure in which a plurality of polygonal cells are assembled in a plan view.
The perforated sheet for taking in loose stool according to any one of claims 1 to 4. The cell has a regular hexagonal shape and has a regular hexagonal shape.
The distance between the opposing sides of the cell is 0.1 mm or more and 10 mm or less.
The perforated sheet for taking in loose stool according to claim 5. The partition wall constitutes a corrugated pattern structure composed of repeating a wavy flute portion and a flat plate-shaped liner portion in a plan view.
The perforated sheet for taking in loose stool according to any one of claims 1 to 4. The distance between the liner portions is 0.5 mm or more and 10 mm or less.
The perforated sheet for taking in loose stool according to claim 7, wherein the corrugated pitch of the flute portion is 0.5 mm or more and 20 mm or less. The compressive strength per density is 0.5 kPa / (kg / m ³ ) or more.
The perforated sheet for taking in loose stool according to any one of claims 1 to 8. The perforated sheet for taking in loose stool according to any one of claims 1 to 9,
An absorbent article provided on one surface side of the perforated sheet for taking in loose stools and comprising an absorber containing a highly absorbent polymer. The absorbent article according to claim 10, further comprising a support sheet provided on one surface side of the perforated sheet for taking in loose stool and absorbing moisture. The perforated sheet for taking in loose stool according to any one of claims 1 to 9,
An absorbent article, which is provided on one surface side of the perforated sheet for taking in loose stool and includes a support sheet for absorbing moisture. The absorbency according to any one of claims 10 to 12, further comprising a top sheet provided on the other surface side of the perforated sheet for taking in loose stool, which has water permeability and a passage portion through which stool passes. Goods. A perforated sheet having a plurality of through holes penetrating in the thickness direction.
The porous sheet is formed of a filament three-dimensional bond formed by fusion bonding of molten filament groups and cooling solidification.
A perforated sheet for an absorbent article, wherein the through hole is formed of a molten filament wound in a loop shape along the thickness direction. It is formed of a three-dimensional filament bond formed by fusion bonding and cooling solidification of the molten filament group.
A sheet for an absorbent article, characterized in that the loop diameter of the molten filament is smaller on the skin surface side than on the non-skin surface side. It is formed of a three-dimensional filament bond formed by fusion bonding and cooling solidification of the molten filament group.
A sheet for an absorbent article, characterized in that the loop pitch of the molten filament is larger on the skin surface side than on the non-skin surface side. A seat body having a plurality of through holes penetrating in the thickness direction is provided.
The through hole is a sheet for an absorbent article, characterized in that the skin surface side is narrower than the non-skin surface side. Longitudinal extension over the front, inseam, and back
A sheet for an absorbent article, characterized in that each end portion in the longitudinal direction is formed to be thicker than the center in the longitudinal direction. A sheet that extends longitudinally over the front, inseam, and back.
A sheet for an absorbent article, which has a convex portion on the skin surface side of the sheet that is in contact with the urethral meatus of the wearer in a worn state, which is higher than other parts of the sheet. A sheet that extends longitudinally over the front, inseam, and back.
A sheet for an absorbent article, which has a recessed portion on the skin surface side of the sheet that is in contact with the wearer's anus in a worn state, as compared with other parts of the sheet. The top sheet placed on the skin side and
With the absorber placed below the top sheet,
A second sheet arranged between the top sheet and the absorber is provided.
The second sheet is an absorbent article characterized in that it is formed of a filament three-dimensional bond formed by fusion bonding of molten filament groups and cooling solidification.

Images