WO2017187945A1

WO2017187945A1 - Absorbent article

Info

Publication number: WO2017187945A1
Application number: PCT/JP2017/014582
Authority: WO
Inventors: 瀧山　吉宏
Original assignee: 王子ホールディングス株式会社
Priority date: 2016-04-27
Filing date: 2017-04-07
Publication date: 2017-11-02
Also published as: RU2708269C1; JP2017196163A; CN109069326A; JP6380454B2; TWI612949B; TW201740898A; CN109069326B

Abstract

This absorbent article (10) comprises a liquid-permeable front sheet (14), a liquid-impermeable rear sheet (12), and an absorbent (13) that includes pulp (29) and a SAP (27) and is positioned between the front sheet (14) and the rear sheet (12), wherein a plurality of intersecting compression lines (22) configured from a plurality of recesses (21) formed by compressing the surface sheet (14) and the absorbent (13) are arranged on the front sheet (14) side of the absorbent (13), and the value for the pulp quantity/SAP quantity of the absorbent (13) in the area including the intersecting areas (23) of the compression lines (22) is greater than the value for the pulp quantity/SAP quantity of the absorbent (13) in the compression lines (22) outside the area that includes the intersecting areas (23).

Description

Absorbent articles

The present invention relates to an absorbent article, and more particularly, to a disposable diaper and an absorbent pad.

Absorbent articles such as disposable diapers (hereinafter, also simply referred to as “diapers”) have been improved in various ways to improve their functions and feel.

Absorbent article absorbs most of the body fluid discharged by the absorber. Here, since the diaper covers the abdomen, buttocks and crotch parts, it is affected by various body movements, particularly leg movements such as walking, turning over, and baby's high and low. In particular, the absorbent body may be twisted, broken, or cracked by various body movements. If it does so, the fitting property to the crotch of a diaper will fall and it will become easy to raise | generate a liquid leak. Furthermore, if the content of the superabsorbent polymer (Super Absorber Polymer, hereinafter referred to as “SAP”) in the absorber is increased in order to increase the absorption retention of the absorber, the flexibility of the absorber itself tends to be lost. Have.

Therefore, as seen in Patent Document 1, the skin contact surface side of the absorber is embossed, which is an oblique grid-like compressed groove extending obliquely with respect to the direction from the front to the back of the diaper. There is something. Thus, by embossing the absorbent body, it has been possible to improve the fit between the crotch of the diaper following the back-and-forth movement of the leg and the roundness of the buttocks, and suppress the leakage of bodily fluids.

Further, such embossing is formed by rotating and moving an embossing roll having an embossing pattern protruding on the surface on a long absorbent sheet. At the time of manufacturing a diaper, the embossing roll was rotated on a long absorbent sheet or the like and embossed, and then cut into a necessary size by laminating various sheets.

JP2015-016218A

By the way, even if pressure due to the weight of the wearer is applied, the top sheet and the absorbent body from the top sheet (top sheet) side disposed on the skin contact surface side of the absorbent body in order to prevent the groove from sagging. Compressed grooves that are more difficult to loosen are proposed. In this case as well, as described above, the compressed groove is formed by rotating the embossing roll on the absorbent body on which the top sheet is laminated. Thus, when forming a compression groove, the surface sheet etc. which are located in an upper layer rather than an absorber bite into a groove | channel by rotation of an embossing roll, and a surface sheet etc. tend to be in the tensioned state strongly. In particular, an emboss pattern having a component extending in an oblique direction, such as an oblique lattice shape, has a portion where the distance between points to be compressed at the same time is shortened (interval becomes narrow), such as an intersecting region of lattices. If the distance between the points to be compressed at the same time is short, the force for pulling the surface sheet from both adjacent compression points is strong, and the surface sheet tends to be strongly stretched.
Then, the powdery SAP in the absorbent body hits the surface sheet, so that the surface sheet in the intersecting region is easily torn during embossing.

The present invention has been made in view of such a problem. The object of the present invention is to make the crossing region of the absorbent body on which the lattice-like embossed pattern is formed difficult to break, and it becomes easy to break and is used by the wearer. An object of the present invention is to provide an absorbent article with improved feeling.

In order to achieve such an object, the absorbent article of the present invention is disposed between a liquid-permeable top sheet, a liquid-impermeable back sheet, and a top sheet and a back sheet. An absorbent article comprising: an absorbent article including a plurality of recesses formed by compressing the topsheet and the absorbent body on the topsheet side of the absorbent body and intersecting each other. Are arranged, and the value of the absorbent pulp amount / SAP amount in the region including the intersection region of the compression row is larger than the value of the absorbent pulp amount / SAP amount in the compression row other than the region including the intersection region. It is characterized by that.

As described above, according to the present invention, there is provided an absorbent article in which the crossing region of the absorbent body on which the lattice-like embossing pattern is formed is hard to break and is easy to break, improving the wearer's feeling of use. can do.

It is a three-dimensional projection figure which shows the external appearance of one Embodiment which applied the absorbent article by this invention to the deployment type disposable diaper. It is the partial fracture | rupture top view which expand | deployed the diaper shown in FIG. 1 and was seen from the skin contact surface side. FIG. 3 is a cross-sectional view of the diaper shown in FIG. 2 cut along line III-III. It is the stereographic projection figure which expand | deploys the diaper shown in FIG. 1, and shows it in a decomposition | disassembly state. It is the partial top view which looked at the absorber part of the diaper shown in FIG. 1 from the top sheet side. It is the expansion partial top view which expanded a part of compression row | line | column in FIG. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. FIG. 7 is a sectional view taken along line VIII-VIII in FIG. 6.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, but includes other absorbent articles belonging to the concept of the present invention.

[Embodiment 1]
The perspective view seen from the front side in the deployment type disposable diaper (what is called a tape type disposable diaper) concerning Embodiment 1 of the present invention is shown in FIG. FIG. 2 shows a plan view of the diaper shown in FIG. 1 developed from the skin contact surface side. FIG. 3 is a sectional view taken along line III-III in FIG. Furthermore, the division | segmentation state which fractured | ruptured and developed the expansion | deployment type disposable diaper shown in FIG. 1 and FIG. 2 is shown in FIG.

The unfoldable disposable diaper (hereinafter sometimes simply referred to as a diaper) 10 in the present embodiment includes a front body region 10F, a back body region 10R, and a crotch region 10C that connects the front body region 10F and the back body region 10R. And have. Moreover, the waist periphery opening part 10W which surrounds a wearer's waist part with the front body area | region 10F and the back body area | region 10R at the time of wear is formed. Similarly, a pair of left and right leg openings 10L that surround the thigh portions of both legs of the wearer are formed by the lower end crotch region 10C of the front body region 10F and the back body region 10R.

When the diaper 10 is worn, the front body region 10F is positioned on the wearer's ventral side, and the back body region 10R is positioned on the wearer's back side. The crotch region 10 C covers the wearer's crotch, and the leg of the wearer is passed through the pair of left and right leg openings 10 L. Therefore, the leg periphery opening 10L is located at any position around the thigh from the base of the wearer's legs.

When the diaper 10 is worn in an appropriate direction, a line along the central axis of the body from the wearer's head to the crotch is used as the virtual line P in the following description as necessary. As shown in FIG. 1, the virtual line P extends through the crotch portion from the abdominal side to the back side at the center of the diaper 10. Specifically, for example, when the waist side of the diaper 10 is up and the crotch side is down, the virtual line P extends along the surface of the diaper 10 in the vertical direction and passes through the crotch portion to The side also extends in the vertical direction. In other words, the vertical direction is a direction along the center axis of the body from the wearer's head to the crotch, and the virtual line P extends along the center axis of the body.

The left and right end edges of the back body region 10R of the cover sheet 11 positioned outside the diaper 10 are overlapped with the left and right end edges of the front body region 10F when worn, and are connected to form a leg opening 10L. A pair of left and right fastening tapes 10A to be obtained are joined. The fastening tape 10A is bonded to the front patch sheet 10B bonded on the cover sheet 11 in the front body region 10F so as to be repeatedly peelable. In addition, an elastic sheet 10D that extends along the width direction of the cover sheet 11 and gives an appropriate wearing feeling around the waist to the wearer is joined to the upper end portion of the rear body region 10R of the cover sheet 11. Has been.

As shown in FIGS. 2 to 4, the diaper 10 according to the present embodiment includes a cover sheet 11, a liquid-impermeable back sheet (back sheet) 12 in order from the outside, as viewed from the skin side of the wearer, An absorbent body 13 (hereinafter also simply referred to as an absorbent body 13) wrapped with a core wrap (tissue) 15, which is a hydrophilic thin sheet, and a top sheet (surface sheet) 14 that touches the skin of the wearer are sequentially stacked. It is joined.

A pair of cutout portions 11A having a semicircular arc shape, each serving as a leg opening 10L, are formed on the left and right sides of the crotch region 10C of the cover sheet 11. The liquid-impermeable back sheet 12 is joined to the cover sheet 11, and the previous absorbent body 13 is disposed between the back sheet 12 and the liquid-permeable top sheet 14. Thus, the top sheet 14 is joined to the back sheet 12. In the vicinity of the center of the left and right side edges in the width direction of the back sheet 12, thread rubber 16 for forming leg gathers is joined in an extended state.

In the left and right side edges in the width direction of the liquid-permeable top sheet 14 in the present embodiment, a pair of liquid-impermeable (or hydrophobic) side sheets 18 forming a three-dimensional gather is provided. The pair of side sheets 18 are formed in the same shape as the pair of cutout portions 11A of the cover sheet 11 at the outer end edges, and stand up along the left and right side edges of the absorbent body 13 when worn, and the wearer excretes. This is a member for preventing side leakage of urine. When each of the pair of side sheets 18 is disposed in a stretched state, the rubber thread 19 as a three-dimensional gather elastic material is folded and gripped on its inner edge toward the absorber 13 side. Furthermore, it rises toward the wearer's skin contact direction. The three-dimensional gather can employ a known configuration used in conventional disposable diapers. For example, it can be formed by sandwiching and fixing a stretched three-dimensional gather elastic material between the layers of the water repellent sheet. As shown in FIG. 2, the side sheet 18 is drawn in the longitudinal direction by the expansion and contraction of the rubber thread 19. And as FIG. 3 shows, it becomes a three-dimensional gather where the inner edge part stood | started up.

In addition, as for the diaper 10 in this embodiment, the absorber 13 becomes long along the virtual line P, and the longitudinal direction is parallel to the virtual line P. A direction orthogonal to the virtual line P is defined as a width direction. In addition, the ratio of the longitudinal direction of the diaper 10 and the width direction is not limited to this embodiment. This ratio is appropriately changed according to the wearer's body shape.

Next, the structure of the absorber part in this embodiment will be described.

FIG. 5 is a partial top view of the portion where the absorber 13 and the top sheet 14 are located as viewed from the top sheet 14 side.

The absorber 13 of the present embodiment located under the top sheet 14 is mainly composed of pulp (represented by reference numeral 29 in FIGS. 7 and 8 described later) and SAP (represented by reference numeral 27 in FIGS. 7 and 8 described later). Represented). The absorbent body 13 has an elongated shape so as to cover the front body, the crotch, and the back body. And it is divided into the front body part M1, the crotch part M2, and the back body part M3. In the crotch portion M2, a pair of notches 13A having an arc shape is formed in accordance with a pair of left and right leg openings 10L surrounding the thick crotch portions of both legs. Note that the cutout portion 13 A may not be formed according to the size of the absorber 13. Further, the absorbent body 13 of the present embodiment is provided with a notch 13A and has an hourglass shape in which the width of the central portion is narrower than the front and rear ends, but the shape of the absorbent body of the present invention is the same. Not exclusively. When the front body part and the back body part are the front and back (up and down) direction, and the direction orthogonal to it is the left and right direction, for example, the corners of the front and back (up and down) ends are rounded off, the ellipse extending in the front and back (up and down) Various shapes are included, such as a rectangular shape, a circular shape, and a rectangular shape having the same length in the front and rear (up and down) left and right.

Further, in order to maintain the shape of the absorbent body 13, for example, the absorbent body 13 is wrapped with a core wrap 15 that is a hydrophilic thin sheet in which end portions are bonded to each other by gluing. The absorbent body 13 wrapped with the core wrap 15 is disposed between the back sheet 12 and the top sheet 14. The top sheet 14 is joined to the back sheet 12 via the absorbent body 13 wrapped with the core wrap 15. In addition, in this embodiment, although the absorber 13 wrapped with the core wrap 15 is used, the absorber in this invention does not need to be wrapped with the core wrap.

And as FIG. 5 shows, the diaper 10 has the compression part formation area | region (embossing pattern formation area) N1 which gave the compression by regular embossing toward the absorber 13 from the top sheet 14 surface. The compression portion forming region N1 is composed of a plurality of concave portions 21 that are compressed and continuously formed, and a plurality of compression rows 22 in which the plurality of concave portions 21 are arranged in an oblique lattice pattern are arranged and extended. ing. The plurality of compressed columns 22 intersect each other. In addition, an uncompressed main absorption region 25 is mainly provided in a region where the compression row 22 is not formed in the compression portion formation region. As shown in FIG. 5, the emboss pattern is not formed on both ends of the absorber 13. Therefore, the absorber 13 is one in which the compression part non-formation area (emboss pattern non-formation area) N2 is located on both sides of the compression part formation area (emboss pattern formation area) N1. This is to prevent body fluid from leaking from the leg opening 10L through the emboss pattern.

In the present embodiment, the emboss pattern is formed up to the upper end portion of the front body portion M1 and the lower end portion of the rear body portion M3. In this way, by forming the embossed pattern to the upper and lower ends, the air permeability of the diaper 10 is enhanced, and the absorbent body 13 is easily bent so that the diaper 10 fits the wearer's body. In the present invention, the embossed pattern allows an aspect in which the upper end portion of the front body portion M1 and the lower end portion of the rear body portion M3 of the absorbent body 13 are not formed, and an aspect in which the embossed pattern is formed up to the left and right ends of the absorbent body 13. It is.

The concave portion 21 in the present embodiment is inclined with respect to an imaginary line P along the center axis of the wearer's body when the diaper is worn. Specifically, the recess 21 has a right angled recess 21a that is inclined in the right direction in the drawing, which is the first direction, with respect to the virtual line P, and a left in the drawing, which is in the second direction, with the predetermined angle β. And a leftward-facing recess 21b inclined in the direction. The concave portions 21 inclined in the same direction are arranged so that the diagonal lines of one lattice of the lattice form a row with a length L1, and form an emboss pattern in a lattice shape extending obliquely. In the present embodiment, the predetermined angle α and the predetermined angle β are the same value, but they may be different values. In the present embodiment, the plurality of recesses 21 are formed by compressing the top sheet 14, the core wrap 15, and the absorber 13 together on the top sheet 14 side. In the present invention, the absorbent body 13 and the top sheet 14 may be embossed together as in this embodiment, or the top sheet 14 is attached to the absorbent body 13 after embossing later. Also good.

As shown in FIG. 5, a row in which a plurality of rightward concave portions 21a are arranged is referred to as a first compression row 22a, and a row in which a plurality of leftward concave portions 21b are arranged is referred to as a second compression row 22b. These compression rows 22 are linearly inclined with respect to the virtual line P at the same angle as the inclination angle of the recess 21. The first compression rows 22a extend in parallel with each other with an interval S1. Moreover, the 2nd compression row | line | column 22b is mutually extended in parallel with the space | interval S2. In this way, the first compressed row 22a and the second compressed row 22b are extended to form an embossed pattern having an oblique lattice shape. In the present embodiment, the intersecting region 23 is formed by the first compressed row 22a and the second compressed row 22b intersecting each other. In the present embodiment, the intervals S1 and S2 are the same value, but they may be different values.

In the present invention, the value of the pulp amount / SAP amount of the absorber 13 in the region including the intersecting region 23 of the compression row 22 is the pulp amount / SAP amount of the absorber 13 in the compression row 22 other than the region including the intersecting region 23. Greater than the value of. FIG. 6 is an enlarged schematic view of a part of the compression row of the circle Q portion in FIG. 7 is an enlarged schematic view of the cross-sectional shape taken along the line VII-VII of FIG. 6, and FIG. 8 is an enlarged view of the cross-sectional shape taken along the line VIII-VIII of FIG. 5 and 6 are drawn with the side sheet 18 omitted for convenience. 7 and 8, the SAP 27 constituting the absorber 13 is represented by a substantially star shape, and the pulp 29 constituting the absorber 13 is represented by a thread or dot.

The embossing that forms the recess 21 compresses the top sheet 14 and the absorbent body 13 together from the surface of the top sheet 14 by interposing an adhesive (for example, hot melt) between the top sheet 14 and the absorbent body 13. Is. The concave portion 21 is formed by compressing the top sheet 14 and the absorber 13 together from the surface of the top sheet 14 with a predetermined mold formed on the embossing roll.

In the pressing by the embossing roll, the pressure is concentrated at the deepest position of the concave portion 21, and the absorber 13 and the top sheet 14 are strongly compressed. During the compression, the SAP 27 of the absorbent body 13 is deformed so as to wrap the fibers of the pulp 29, and is entangled tightly to form a thin bottom portion in a state where both are integrated. Thus, while the absorber 13 is strongly compressed in the recessed part 21, and the absorber 13 forms a thin bottom part, the shape of the recessed part 21 is maintained clearly. For example, even when the wearer is seated and pressure due to the weight of the wearer is applied to the surface of the absorbent body 13, the concave portion 21 maintains its shape without sagging. And even if the diaper 10 is pulled strongly by various movements of the legs, the SAP 27 is deformed so as to wrap the fibers of the pulp 29, and the recess 21 can maintain its shape. In addition, in this embodiment, although the recessed part 21 has a one-stage structure, it may be a two-stage or more-stage structure. By providing a multi-step structure, a protrusion corresponding to the lowermost concave portion is provided in the embossing mold, and the portion where the top sheet 14 and the absorbent body 13 are firmly joined can be obtained by strongly compressing partially. It is possible to prevent the occurrence of defects such as the top sheet 14 being torn during manufacturing.

In this embodiment, the recesses 21 of the embossed pattern in the diagonal lattice shape are formed by pressing an embossing roll having a mold formed on the surface in accordance with the recesses 21 while rotating. As shown in FIG. 5, when the embossing roll rotates and advances in the direction of arrow W (direction from the front body part M1 toward the back body part M3), the recesses line up in a direction orthogonal to the advancing direction W of the embossing roll. All 21 portions are pressed simultaneously. In the present embodiment, the size of the embossing roll is determined so that the circumference of the embossing roll corresponds to the length of the absorbent body 13 in the longitudinal direction, but is not limited thereto.

In this embodiment, the advancing direction W of the embossing roll is parallel to the direction that becomes the previous virtual line P when the diaper 10 is completed. As above-mentioned, the top sheet 14 is laminated | stacked on the absorber 13 cut | disconnected by the size of the diaper 10, and both the top sheet 14 and the absorber 13 are compressed with an embossing roll. Since the cutting is performed with a length extending from the front body, the crotch, and the back body of the diaper 10, the traveling direction W of the embossing roll is also parallel to the virtual line P, so that the diagonal lattice shape is inclined with respect to the virtual line P. Can be formed.

Since the top sheet 14 forming the recess 21 by deeply pressing the embossing roll is stretched, the top sheet 14 may be torn. However, if the embossing roll is simply pressed shallowly to form the recess 21, the adhesive effect between the top sheet 14 and the absorbent body 13 is weakened, and the top sheet 14 is easily peeled off from the absorbent body 13. It becomes impossible to form the embossed pattern.

Therefore, the recess 21 of the present embodiment has a short distance between the adjacent right-facing recess 21a and the left-facing recess 21b, and at the same time enters the intersection region 23 where the SAP amount is low. Is formed. Thereby, since the absorber 13 to hold down is few, the top sheet 14 becomes difficult to tear. Furthermore, it is possible to prevent the top sheet 14 from being peeled from the absorbent body 13 while maintaining the softness of the top sheet 14 and the absorbent body 13.

As shown in FIG. 7, in the cross-sectional shape near the recess 21, the open end is wider than the bottom. Moreover, unlike the case of FIG. 8 mentioned later, the value of the pulp amount / SAP amount of the absorber 13 is equal in the compression row | line | column 22a compressed and the main absorption area | region 25 which is not compressed. Here, the portion represented by reference numeral 13D is a multi-SAP / compressed portion in which the value of pulp amount / SAP amount in the absorbent body 13 is small (that is, the proportion of the SAP amount is large) and is compressed. . The portion represented by reference numeral 13E is a multi-SAP / non-squeezed portion of the absorbent body 13 that has a small pulp amount / SAP amount and is not compressed. That is, the multiple SAP / compressed portion 13 D represents the recess 21 other than the intersecting region 23, and the multiple SAP / non-compressed portion 13 E represents the absorbent body 13 in the main absorbent region 25. In addition, the multiple SAP / compressed portion 13D and the multiple SAP / non-pressed portion 13E both have a pulp amount / SAP amount value as compared with the absorbent body 13 (small SAP / compressed portion 13F described later) in the intersecting region 23. It is a small area.

Here, as described above, the absorbent body 13 is mainly composed of the SAP 27 and the pulp 29, and the density is mainly related to the fiber density of the pulp 29. Accordingly, the multi-SAP / pressed portion 13D is in a state where the pulp 29 is compressed and the gap between the pulps 29 is small, while the multi-SAP / non-pressed portion 13E has a gap between the pulp 29 compared to the multi-SAP / pressed portion 13D. There are many states. In the present invention, the density in the intersecting region 23 is allowed to be higher than or equal to the density as well as the density of the region other than the region where the compression row is formed. .

In addition, since the concave portion 21 is formed into a film shape by compressing and joining together the top sheet 14 that is a synthetic fiber and the absorbent body 13 whose main component is pulp 29, the bottom surface of the concave portion 21 absorbs body fluid. Until then, the body fluid in the extending direction of the compression row 22 is promoted to diffuse.

As shown in FIG. 8, in the compression row 22a, the value of the pulp amount / SAP amount of the absorbent body 13 in the intersecting region 23 is the same as the absorbent body 13 (multi-SAP / compressed) in the region where the recesses 21 other than the intersecting region 23 are formed. It is larger than the value of pulp amount / SAP amount of part 13D). Here, the intersection area 23 represented by reference numeral 13F has a small pulp / SAP amount value in the absorbent body 13 (that is, the proportion of the SAP amount is small), and the small SAP / compressed portion that is compressed. It is. That is, the small SAP / compressed portion 13 F represents the region where the value of the pulp amount / SAP amount is greater than the recessed region 21 other than the intersecting region 23.

The absorbent body 13 has a pulp layer in contact with the top sheet 14, and the basis weight of the pulp in the pulp layer in the intersecting region 23 is higher than the basis weight of the pulp in the compressed row 22 other than the intersecting region 23. Can be formed. Further, the basis weight of the SAP of the absorbent body 13 in the intersecting region 23 can be formed lower than the basis weight of the SAP of the absorbent body 13 in the compressed row 22 other than the intersecting region 23.

Thus, by changing the ratio of the pulp amount in the compression row 22 of the absorbent body 13 and increasing the value of the pulp amount / SAP amount of the absorbent body 13 (small SAP / pressed portion 13F) in the intersecting region 23, the pulp 29 can cover the SAP 27. For this reason, it is possible to prevent the SAP 27 from hitting the top sheet 14 during embossing and the top sheet 14 in the intersecting region 23 from being torn. Further, since the SAP 27 is less likely to hit the top sheet 14 in the intersecting region 23, it is possible to prevent the absorber 13 from being easily broken in the intersecting region 23 due to the movement of the wearer. Further, as described above, the top sheet 14 in the intersecting region 23 is hardly broken, so that the absorber 13 can be deeply pressed during embossing, and a clear emboss pattern can be formed. By forming a clear embossed pattern, the diaper 10 can be easily folded and flexible. In the present invention, the basis weight of the pulp of the pulp layer in the intersecting region 23 may be higher than the basis weight of the pulp of the pulp layer in the compression row 22 other than the intersecting region 23, or the absorbent in the intersecting region 23. The basis weight of the SAP 13 may be lower than the basis weight of the SAP of the absorbent body 13 in the compressed row 22 other than the intersecting region 23. Similarly, according to this configuration, the diaper 10 can be easily bent and flexible.

In the present embodiment, the above-described “small SAP / pressing portion 13F” is provided by, for example, impacting the SAP 27 by sandwiching the absorber 13 with a mold and scattering the SAP 27.

Further, the “small SAP / compressed portion 13 F” is formed by, for example, the following steps (1) to (6). The absorbent mat (which represents the absorbent main body that does not include the core wrap in the description of this process) is formed by mixing pulp and powdery SAP and spraying them onto the filters of two forming drums, for example.
(1) First, an absorbent mat having a constant thickness is prepared by the first forming drum.
(2) Next, the second forming drum intermittently (for example, parallel to the advancing direction W shown in FIG. 5) so that a pulp layer is formed in a portion corresponding to the “small SAP / pressed portion 13 F”. Only the pulp layer (in the form of vertical stripes) is produced and laminated on the absorbent mat produced in step (1).
(3) Thereafter, the absorbent mat laminated in the step (2) is wrapped with the core wrap 15, and the core wrap 15 and the absorbent mat are bonded together by hot melt or the like, thereby creating the absorbent body 13.
(4) Cut the prepared absorbent body 13 into the size of one diaper.
(5) The top sheet 14 is laminated on the cut absorber 13.
(6) The top sheet 14 and the absorber 13 are combined and compressed by an emboss roll so that the intersecting region 23 is disposed in the pulp layer.

In the present embodiment, the value of the pulp amount / SAP amount of the absorbent body 13 (small SAP / pressed portion 13F) in the intersecting region 23 of the compressed row 22 is the absorbent body 13 (multiple SAP) in the compressed row 22 other than the intersecting region 23. -It was made larger than the value of pulp amount / SAP amount of pressing part 13D). However, in the present invention, the value of the pulp amount / SAP amount of the absorbent body 13 may be increased not only in the intersecting region 23 but also in a region including the periphery of the intersecting region 23. The “periphery of the intersecting region 23” is not limited to the compressed region, and may include an uncompressed region. This “compressed area” refers to an area that is not compressed to the same extent as the compressed string 22, for example.

Conventionally, in order to improve the fit, there is a thing that has been embossed on the skin contact surface side of the absorbent body, which is an oblique lattice-like compressed groove extending obliquely with respect to the direction from the front to the back of the diaper. . Since the compressed groove itself is lower than the uncompressed portion, it does not touch the wearer's skin directly, but the top sheet and the absorber are pulled near the lattice points, that is, around the lattice intersection region. It is fixed in a stretched state. For this reason, the powdery SAP in the absorbent body sometimes hits the top sheet. If it does so, the periphery of the grid | intersection area | region of the grid | lattice in the skin contact surface of a top sheet will become a hard thing compared with other parts, for example, the feeling of SAP feeling will be transmitted as a touch.

The area around the lattice crossing area touches the wearer's skin, which gives the wearer a firm feel and a gritty feel, which is not preferable. In particular, the diaper is in contact with delicate skin parts such as the crotch, so that a soft touch is required, and if the area around the intersection of the lattice is hard, the touch of the skin is not preferable.

Referring to FIG. 6, the right-side recessed portion 21 a is inclined in the right direction with respect to the traveling direction W, and the left-side recessed portion 21 b is inclined in the left direction. For this reason, as the embossing roll advances in the traveling direction W, the distance between the right-facing recess 21a and the left-facing recess 21b that are adjacent to the intersecting region 23 becomes shorter.

When the embossing roll forming the recess 21 is pressed, the top sheet 14 is pulled so as to be pulled into the recess 21. Since the adjacent right-facing recess 21a and left-facing recess 21b are formed by pressing at the same time, the top sheet 14 positioned therebetween is pulled from the left and right. That is, in FIG. 6, the pulling force indicated by the arrow A is applied to the left and right simultaneously, and the top sheet 14 is pulled. As the distance between the adjacent right-facing recess 21a and left-facing recess 21b becomes shorter, the margin for the pull of the pull-in force A of the top sheet 14 decreases, so the top sheet 14 becomes tightly stretched. For this reason, the SAP 27 in the absorbent body 13 hits the top sheet 14, and the surface of the top sheet 14 becomes rough. This is not preferable because it is irritating to the wearer's skin.

In another embodiment of the present invention, a region having a large pulp amount / SAP amount value is provided not only in the intersection region 23 but also in the vicinity thereof. According to this configuration, the touch feeling of the SAP 27 is transmitted as a touch when the periphery of the intersection region 23 touches the wearer's skin, so that the wearer is given a firm touch and a feel that is soft. Can be suppressed. As a result, the corner portion formed in the intersecting region 23 does not become hard and feels better, and the surface of the top sheet 14 has a smooth finish, thereby improving the wearer's feeling of use.

Next, an embodiment of an emboss pattern by embossing will be described.

As shown in FIG. 5, the embossed pattern of the present embodiment has a lattice shape in which a plurality of recessed portions 21 extending continuously are arranged, and the length of the diagonal line L1 of one lattice is 42 mm (4.2 cm). The recessed part 21 is arrange | positioned so that it may become. Further, as shown in FIG. 6, the width Q1 of the compression row 22 is 3 mm, preferably 2 mm to 5 mm. As shown in FIGS. 5 and 6, in the emboss pattern of the present embodiment, the first compression row 22a extends in parallel at the interval S1, and the second compression row 22b extends in parallel at the interval S2. ing. The first compressed row 22a and the second compressed row 22b form an emboss pattern having an oblique lattice shape. In the present embodiment, the lengths S1 and S2 of one side of the grating are equal and 29.7 mm. The interval between the lattices is preferably 13.0 mm or more and 54.0 mm or less.

Here, the depth of the recess 21 in the absorbent body 13 is D1, the thickness of the absorbent body 13 and the top sheet 14 before embossing, that is, the maximum composed of the absorbent body 13 and the top sheet 14 in the main absorbent region 25. Is D2, the thickness of the diaper 10 of the recess 21 is D3, and the thickness of the absorber 13 in the recess 21 is D4. In the present embodiment, the depth D1 of the recess 21 is 7.8 mm. The thickness D2 is 8.0 mm, preferably 5.0 mm to 20.0 mm. The thickness D3 is 1.0 mm, and the thickness D4 is preferably 0.2 mm to 0.6 mm.

Then, the depth D1 of the recess 21 is about 42.5% to 97.5% of the thickness D2. Thus, the recessed part 21 in this embodiment forms the recessed part 21 by compressing the absorber 13 toward the back sheet 12 in the press by the embossing roll.

The value of the pulp amount / SAP amount of the absorbent body 13 (small SAP / pressed portion 13F) in the intersection region 23 of the present embodiment is 1.0, and preferably 0.9 to 1.1. Further, the value of the pulp amount / SAP amount of the absorbent body 13 (multi-SAP / pressed portion 13D) in the region other than the intersecting region 23 of the compression row 22 is 0.8, and preferably 0.7 to 0.9.

By forming the absorber 13 at such a pulp amount ratio, the SAP 27 in the intersection region 23 can be covered with the pulp 29. Therefore, it is possible to improve the wearer's feeling of use by making the intersecting region 23 of the absorbent body 13 formed with the lattice-shaped emboss pattern difficult to break.

By forming the recesses 21 at such depths and intervals, the groove can be maintained even when weight is applied, and the soft touch can be maintained on the skin contact surface of the crotch part of the diaper. Can do. Therefore, the slanted grid-like embossed pattern can suppress deformation such as diaper swaying with respect to various movements of the legs, and the touch can be made soft.

[Modification]
The present invention is not limited to the above-described embodiments, and appropriate changes and modifications can be made without departing from the technical idea of the present invention.

For example, in the above-described embodiment, the embossing is performed using an embossing roll. However, the embossing is not limited to this method, and embossing is performed in units of diaper size using a plate-like embossing plate that matches the size of the diaper. What you push may be used.

In addition, after the absorbent body 13 is wrapped with a hydrophilic sheet, not only the top sheet 14 but also the top sheet 14 may be disposed directly on the absorbent body 13. Further, a liquid diffusion sheet for improving liquid diffusibility may be provided between the top sheet 14 and the hydrophilic sheet. This sheet makes it easier for body fluid to diffuse. Further, the hydrophilic sheet may be attached so as to enclose the absorbent body 13, or may be simply disposed so as to overlap the front and back without wrapping the end of the absorbent body 13.

In the above embodiment, the compression row 22 is formed by the concave portions 21 that are continuous grooves, but the compression row 22 may be formed by discontinuous (for example, intermittent) grooves. In addition, the shape of the recessed part 21 is not restricted to the shape shown to this embodiment, Various shapes, such as a square, a circle, an ellipse, and a triangle, can be taken.

The disposable diaper 10 according to the above embodiment is applicable to both adults and children. In the above-described embodiment, the unfolded diaper 10 (so-called tape-type diaper) has been described as an example. Needless to say, the present invention is also applicable to a pants-type diaper. In addition, the absorbent article of the present invention is not limited to diapers, but can be applied to other general various absorbent articles such as an absorbent pad and a urine leak pad. For example, as shown in FIG. 5, the present invention can be applied to an absorbent pad or the like from the structure of the absorbent body 13 and the top sheet 14, and has the same effects as a diaper.

In the above embodiment, only one side of the absorber 13 is embossed, but this is not restrictive, and double-sided embossing may be employed. That is, the recesses 21 are formed on both the front and back surfaces of the absorbent body 13 by embossing from both the top sheet 14 side and the back sheet 12 side. Thereby, in order not to concentrate a pressure only on one surface among the front and back of the absorber 13, the compression row | line | column 22 is clearly formed even if it does not press deeply at the time of embossing, and the diaper 10 is flexible. You can keep it.

DESCRIPTION OF SYMBOLS 10 Disposable diaper 10A Fastening tape 10B Front patch sheet | seat 10F Front body area | region 10R Rear body area | region 10C Crotch area | region 10W Waist circumference opening part 10L Leg circumference opening part 10D Elastic sheet 11 Cover sheet |

seat

11A, 13A Notch part 12 Back sheet (back surface sheet)
13 Absorbent body 14 Top sheet (surface sheet)
15

Core wrap

16, 19 Thread rubber 18 Side sheet 21 Recess 21 a Right-facing recess (a recess inclined in the first direction)
21b Left-facing concave portion (a concave portion inclined in the second direction)
22 compression row 22a first compression row 22b second compression row 23 intersection region 25 main absorption region 27 SAP
29 Pulp S1 Formation interval S2 of a plurality of first compression rows Q2 Formation interval of a plurality of second compression rows Q1 Width of compression row D1 Depth depth D2 Thickness of main absorbent region D3 Diaper thickness in recess D4 Absorber in recess Thickness L1 Diagonal line of one ridge

Claims

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber containing pulp and SAP, disposed between the top sheet and the back sheet,
On the top sheet side of the absorbent body, a plurality of compressed rows that are formed by compressing the top sheet and the absorbent body and intersect each other are arranged,
The value of the pulp amount / SAP amount of the absorber in the region including the intersecting region of the compression row is larger than the value of the pulp amount / SAP amount of the absorber in the compression row other than the region including the intersecting region. Absorbent article characterized by.
The absorber has a pulp layer in contact with the top sheet,
The basis weight of the pulp of the pulp layer in the region including the intersecting region is higher than the basis weight of the pulp of the pulp layer in the compression row other than the region including the intersecting region. Absorbent article.
The basis weight of the SAP of the absorber in the region including the intersecting region is lower than the basis weight of the SAP of the absorber in the compression row other than the region including the intersecting region. Absorbent article as described in 1.
The absorbent article according to any one of claims 1 to 3, wherein the region including the intersecting region includes a periphery of the intersecting region.
The absorbent article according to any one of claims 1 to 4, wherein the plurality of recesses are continuous grooves.