JP5290392B2 - Pants-type disposable diaper - Google Patents

Abstract

[PROBLEMS] To provide an absorbent article which has satisfactory permeability and is less apt to make muggy. [MEANS FOR SOLVING PROBLEMS] The absorbent article comprises an exterior sheet (12) comprising a permeable outer layer (12S), a permeable inner layer (12H), and an elastic stretch member (12C) interposed therebetween and an absorption part (20) which is disposed on the body side of the exterior sheet (12) and absorbs and holds body fluid. The exterior sheet (12) has permeability-improved part (12P) having neither the elastic stretch member (12C) nor the inner layer (12H), the part (12P) being formed, e.g., in an intermediate area (L) in the front/back direction for the absorbent article.

Description

  The present invention relates to a pants-type disposable diaper.

  In infant and adult tape-type or pants-type disposable diapers, a top sheet that is located on the body side and transmits body fluid, a back sheet that is located on the back side and prevents body fluid from passing through, and is interposed between these sheets. An absorbent that absorbs excreted body fluid that has passed through the top sheet is used as an absorbent portion, and the back sheet side of the absorbent portion is joined to the body side of an exterior portion made of a nonwoven fabric or the like.

  Especially in many pants-type diapers, the entire exterior part is a two-layer sheet consisting of an outer layer and an inner layer, and elastic elastic members such as rubber thread are fixed between these layers to improve the fit around the waist and around the abdomen. I am letting. Fit is important not only for wearing feeling but also for preventing leakage.

  On the other hand, the occurrence of stuffiness due to the moisture of the excrement is one factor that deteriorates the feeling of use, and improvement is desired.

  However, in a pants-type disposable diaper having such an exterior part, there is a problem that stuffiness due to the moisture of excreta is likely to occur.

JP 2004-208836 A JP 2002-159529 A JP 2002-159528 A

  Then, the main subject of this invention is providing the underpants type disposable diaper which has the permeability | transmittance and is hard to be steamed. In addition, when the permeability is improved, odors such as urine, stool, sweat and the like are easily ventilated. Therefore, it is an object of the present invention to improve the permeability and reduce the odor.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An outer layer having at least a gas permeability and a visible light permeability, an inner layer having at least a gas permeability and a visible light permeability, and an elastic elastic member interposed therebetween, and the exterior An absorption part provided on the body side of the part for absorbing and holding body fluids,
The exterior portion includes a front end side portion located on the front end side, a rear end side portion located on the rear end side, and an intermediate portion between them, and both side edges of the intermediate portion are legs that follow the legs of the adherend. Each is formed as a peripheral edge, and the front end side portion and the rear end side portion are formed as a waistline portion along the waistline of the adherend,
In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed by joining both sides on the ventral side and both sides on the back side of the exterior part,
Each of the abdominal side and the back side of the exterior part is provided with a leg elastic elastic member along the leg circumference, and a belly elastic elastic member and a back elastic elastic member of the back side in the intermediate part. Are spaced apart in the front-rear direction,
The exterior portion includes an elastic elastic member and one of an outer layer and an inner layer in a separation area between the belly side elastic elastic member and the back leg elastic elastic member in the intermediate portion. A permeation improving portion that extends over the entire width of the exterior portion along the width direction of the pants-type disposable diaper within a range overlapping the absorbent portion in the front-rear direction of the pants-type disposable diaper A pants-type disposable diaper characterized by

(Function and effect)
As a result of intensive research on the cause of stuffiness, the present inventors have found that stuffiness has occurred due to the shielding effect by the exterior portion, the exterior portion has a two-layer structure, and is usually an adhesive for fixing an elastic elastic member As a result, it was found that the permeability was extremely deteriorated. The exterior part has a two-layer structure and the adhesive is applied in order to fix the elastic elastic member between the layers, and if it is sacrificed to improve the permeability, the fit property Cannot be improved.

  Therefore, as a result of further research, the present inventors have made the entire exterior portion into two layers even though the conventional product does not need or is not provided with an elastic stretch member. I realized that. The present invention has been made on the basis of such knowledge, and is characterized in that the exterior portion is provided with a permeability improving portion that does not have an elastic elastic member and at least one of the outer layer and the inner layer. Is.

  As a result, a permeability improving portion that does not have all of the elastic elastic member, the outer layer and the inner layer, or has only the outer layer or the inner layer is formed in the exterior portion that has been uniformly formed in the conventional two-layer structure. Further, the improvement of permeability makes it possible to prevent stuffiness. In addition, in the present invention, the elastic stretchable member or the like is not uniformly omitted, and the permeability is improved partially so that the elastic stretchable member may be provided as in the conventional case. It is possible to prevent stuffiness without deteriorating the fit.

  In the present invention, “permeability” means at least gas (including odor) permeability (breathability) and visible light permeability (transparency), and liquid permeability. It is preferable that it is not present, but it may be present.

  The permeability improving part in the exterior part is the boundary between the part having the outer layer and the part not having the outer layer in the latter case when the elastic part, the outer layer and the inner layer are not provided, and the absorbing part is exposed to the outer surface of the product. May be exposed on the outer surface of the product, resulting in poor appearance.

  On the other hand, when the outer layer is left in the permeability improving portion and the inner layer is omitted, the exterior portion is covered with a continuous layer when viewed from the outer surface, which is preferable.

  For example, when there are a plurality of portions having elastic elastic members, the inner layer can be provided individually for each portion. However, when these inner layers overlap each other, it is difficult to improve the permeability at the overlapping portion. . Therefore, in order to prevent such a state, when it has two or more inner layers, it is preferable to arrange | position so that it may not mutually overlap.

  The permeability improvement part of this invention can also be made into the form which has only an inner layer.

  For example, when there are a plurality of portions having elastic elastic members, the outer layer can be provided individually for each portion. However, when these outer layers overlap each other, it is difficult to improve the permeability at the overlapping portion. . Therefore, in order to prevent such a state, when it has two or more outer layers, it is preferable to arrange | position so that it may not mutually overlap.

  In a pants-type disposable diaper, the easiness of simmering hardly changes in the width direction of the pants-type disposable diaper. It is preferable that it extends along the entire width of the exterior part along.

  The total length in the front-rear direction of the pant-type disposable diaper of the permeability improving portion is preferably 30% or more of the front-rear direction length of the pant-type disposable diaper.

  In a pants-type disposable diaper, since the easiness of steaming has a large difference in the front-rear direction of the pant-type disposable diaper, the permeability improving portion preferably has the total length in the front-rear direction of the pant-type disposable diaper described in this section. The term “total length” means the sum of the lengths in the front-rear direction of the pants-type disposable diaper of each permeability improving part when it has a plurality of permeability improving parts, and has only one permeability improving part. If not, it means the length of the pants-type disposable diaper in the front-rear direction.

  The present invention intends to effectively prevent stuffiness by providing a permeability improving portion at an intermediate portion in the front-rear direction of the absorbent article, that is, a crotch portion and a portion that is easily stuffy in the vicinity thereof.

<Invention of Claim 2>
The pants-type disposable diaper according to claim 1, wherein the exterior portion includes a permeability improving portion that does not include an elastic elastic member and any one of an outer layer and an inner layer in the waist portion.
<Invention of Claim 3>
The underpants type disposable diaper of Claim 1 or 2 whose area of the part which the said transparency improvement part overlaps with the back surface of the said absorption part is 30% or more with respect to the area of the whole back surface of the said absorption part.
(Function and effect)
As described above, when the ratio of the transparency improving portion in the back surface of the absorbing portion is 30% or more, the transparency is particularly excellent.
<Invention of Claim 4>
The underpants type disposable diaper of any one of Claims 1-3 in which the display part is provided so that it can visually recognize through the said transparency improvement part.

(Function and effect)
The permeability improving unit of the present invention is not limited to gas permeability, and for example, the light permeability is also improved. Therefore, if a display section for product name, function description, character, etc. is provided so that it can be seen through the transparency improving section of the present invention, the display that was conventionally visible through the exterior part of the two-layer structure becomes clearer. This is preferable because it becomes visible.

<Invention of Claim 5>
Wherein the inner layer and the outer layer, 0.5 to 15 g / m ² of which is bonded by a hot melt adhesive applied at a rate, pants type disposable according to any one of claims 1 to 4 Diapers.

(Function and effect)
As described above, when the inner layer and the outer layer are bonded together using the hot melt adhesive, the permeability in the portion other than the permeability improving portion can be improved by suppressing the amount of the adhesive applied.

<Invention of Claim 6>
The underpants type disposable diaper of any one of Claims 1-5 which provided the deodorizer so that it might contact with the odor which goes outside through the said permeability improvement part from the said absorption part.

(Function and effect)
According to the present invention, the permeability in the permeability improving part is improved, and accordingly, odors such as urine, stool, and sweat are easily released to the outside. Therefore, when configured as described in this section as necessary, such as for adult use, the odor going to the outside through the permeability improving unit is deodorized by contact with the deodorant and released to the outside Is preferable.

  As described above, according to the present invention, there is an advantage that the permeability can be improved and the stuffiness can be prevented without lowering the fit.

It is a perspective view of the underpants type diaper of the 1st form. It is a body side top view of the diaper of the deployment state of the 1st form. FIG. 3 is a schematic cross-sectional view taken along line 3-3 in FIG. 2. It is an outer surface side top view of the unfolded state of the 1st form. FIG. 5 is a schematic cross-sectional view taken along line 5-5 of FIG. It is an outer surface side top view of the 2nd form. FIG. 5 is a schematic cross-sectional view corresponding to the line 5-5 in FIG. 2 in the second embodiment. It is an outer surface side top view of a 3rd form. FIG. 5 is a schematic view of a cross section corresponding to line 5-5 in FIG. 2 in a third embodiment. It is an outer surface side top view of a 6th form. FIG. 15 is a schematic view of a cross section corresponding to line 5-5 in FIG. 2 in a sixth embodiment. It is an outer surface side top view of a 7th form. It is the schematic of the cross section corresponded to 5-5 line of FIG. 2 in 7th form. It is an outer surface side top view of a 7th form. It is a perspective view of the paper diaper of the 9th form. It is an outer surface side top view of a deployment state of the ninth form of a diaper.

  Hereinafter, various forms will be described in detail based on an example of a pants-type diaper.

<First form (reference form)>
An example of a pants-type disposable diaper is shown in FIGS. The pants-type disposable diaper 10 includes an exterior sheet 12 constituting an exterior part, and an absorption part 20 fixed to the body side (inner surface side). The absorption part 20 is a part that receives and absorbs excrement such as urine and loose stool, and the exterior sheet 12 is a part for supporting the absorption part 20 to the wearer.

(Exterior sheet)
The exterior sheet 12 has a front end side portion W located on the front end side of the pants-type disposable diaper, a rear end side portion W located on the rear end side of the pants-type disposable diaper, and an intermediate portion L between them, The portion W and the rear end side portion W are formed as waistline portions along the waistline of the adherend, and both side edges of the intermediate portion L are formed as leg periphery edges 12E which are constricted along the periphery of the wearer's legs. This is where the wearer's legs are placed. As a result, the exterior sheet 12 has a substantially hourglass shape as a whole. Although the absorption part 20 can take arbitrary shapes, in the form of illustration, it is a rectangle.

  As shown in FIG. 2, the outer sheet 12 has the absorbent portion 20 installed and fixed at a predetermined position, and the front and rear end portions in the front-rear direction are folded and fixed on the front end portion and the rear end portion in the front-rear direction of the absorbent portion 20. After that, it is folded back and forth so that the abdominal side 12F and the back side 12B overlap, and the joining regions 12A on both sides of the abdominal side 12F and the back side 12B of the exterior sheet 12 are heat-sealed, hook materials, buttons, fasteners, etc. Are joined together. Thus, the pants-type disposable diaper having the structure shown in FIG. 1 and having a waist opening WO and a pair of leg openings LO is obtained.

  In the illustrated example, the width (length in the width direction) of the intermediate portion (length in the width direction) of the absorbent portion 20 in the front-rear direction (longitudinal direction, ie, the vertical direction in FIG. 2) is shorter than the width connecting the peripheral edges of the outer sheet 12. The width relationship may be reversed or the same width.

  As shown in FIG. 5, the exterior sheet 12 is formed by bonding a permeable outer layer 12S and a permeable inner layer 12H by a hot melt adhesive or a joining means such as heat seal, and also using both layers 12S and 12H. The elastic elastic members 12C, 12C... Are fixed in an extended state.

  When the outer layer 12S and the inner layer 12H are bonded with a hot melt adhesive, the type of the hot melt adhesive is not particularly limited as long as it is widely used as a hot melt adhesive in this technical field. For example, AFX-088A (manufactured by Nitta Findlay) can be used.

In consideration of transparency, the coating amount of the hot melt adhesive is preferably a 0.5 to 15 g / m ^2, particularly preferably in the 0.5~6g / m ^2. If the application amount of the hot melt adhesive is too small, the adhesive strength may be insufficient. On the other hand, if the amount is too large, the permeability may be extremely lowered.

  As an application pattern of the hot melt adhesive, an appropriate pattern such as a curtain, a spiral, a summit (with a narrow interval between the spirals), a solid, and a slot can be employed. In particular, when a hot melt adhesive is applied to the outer surface of the elastic elastic member 12C sandwiched between the two layers 12S and 12H, and the both layers 12S and 12H are bonded via the adhesive and the elastic elastic member 12C, Since the usage-amount of a hot-melt-adhesive can be reduced, it is preferable. In addition, ultrasonic welding can be used in place of the adhesive, and in this case, the bonding area can be reduced, so that the outer layer 12S and the inner layer 12H can be bonded together while ensuring higher permeability.

The outer layer 12S and the inner layer 12H of the exterior sheet 12 can be used without any limitation as long as they are permeable materials, but it is preferable to use a water-repellent nonwoven fabric from the viewpoint of touch and waterproofness. Each of the outer layer 12S and the inner layer 12H may be a laminated nonwoven fabric such as an SMS nonwoven fabric (a single nonwoven fabric formed by laminating the same or different layers during production). The thicknesses of the outer layer 12S and the inner layer 12H can be determined as appropriate, but the thickness of the outer layer 12S is preferably equal to or greater than the thickness of the inner layer 12H. The outer layer 12S and the inner layer 12H are each preferably in the range of 5 to 30 g / m ^{2 in} basis weight. The thickness of the outer layer 12S is preferably 5 mm or less, and the thickness of the inner layer 12H is preferably 1 mm or less. If the outer layer 12S or the inner layer 12H is too thin, the strength may be insufficient and may be broken during use, while if it is too thick, the permeability may be insufficient.

  As elastic elastic member 12C, thread rubber or elastic foam band or sheet can be used, but it is desirable to provide a large number of thread rubbers in parallel. In the illustrated form, a large number of rubber threads 12C are provided in parallel at predetermined intervals in the front-rear direction over the entire waistline region W. Since the rubber thread 12C is provided in the entire waist region W, even if the elastic force of the rubber thread 12C itself is weak, as a whole, it also hits the wearer in the lower waist region U. Therefore, the product is suitable for the wearer. To fit.

  And, characteristically, almost all except for the front and rear edge portions of the intermediate portion L in the front-rear direction of the exterior sheet 12 other than the portion where these elastic elastic members 12C are arranged, spans the entire width along the width direction, Although the outer layer 12S is included, the permeability improving portion 12P does not include the inner layer 12H and the elastic elastic member 12C. Further, the inner layer 12H is individually provided in each of the front end side portion W and the rear end side portion W in the front-rear direction of the exterior sheet 12, and in the developed state, the inner layers 12H and 12H do not overlap each other. In the direction along the exterior sheet 12 (for example, the front-rear direction or the width direction shown in FIG. 4), they are separated from each other by the permeability improving portion 12P. As a result, the permeability in the crotch part and the part near the crotch where it is easily sultry is drastically improved, thereby preventing the sultry. And in this form, 12 C of elastic elastic members are provided over the whole trunk periphery area | region W, and it can aim at prevention of dampness, without reducing fit property.

  The length in the front-rear direction of the permeability improving portion 12P is preferably 30% or more, particularly 35-65% or more of the length in the front-rear direction of the pants-type disposable diaper. Further, in terms of the area ratio of the portion that overlaps the back surface of the absorbing portion 20, the transparency improving portion 12P is configured to overlap 30% or more, particularly 35 to 50%, with respect to the entire back surface of the absorbing portion 20. preferable. From the viewpoint of improving the permeability, the larger the permeability improving portion 12P, the better. However, if it is excessively large, there is no portion where the elastic elastic member 12C is provided, which may impair the fit.

  (Absorption part)

  As shown in FIG. 3, the absorbent portion 20 may include a topsheet 30 made of, for example, a nonwoven fabric that allows body fluid to permeate, and an absorbent element 50 in order from the use surface side. In a normal case, a body fluid impermeable sheet (also called a back sheet) 70 made of a plastic sheet or the like is provided on the back side of the absorbent element 50. The back side of the body fluid impermeable sheet 70 is joined to the body side surface of the exterior sheet 12. In addition, an intermediate sheet (second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer body fluid that has passed through the top sheet 30 to the absorbent element 50. Furthermore, in order to prevent excrement from leaking on both sides of the absorption part 20, barrier cuffs 60, 60 standing on both sides of the absorption part 20 can be provided.

(Top sheet)
The top sheet 30 has a property of transmitting body fluid. Accordingly, the material of the top sheet 30 is sufficient if it exhibits this body fluid permeability, and examples thereof include a porous or non-porous nonwoven fabric and a porous plastic sheet. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. Examples include synthetic fibers such as polyethylene and polypropylene such as olefins, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers in which two or more of these are used. can do. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, and a needle punch method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  The top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

(Intermediate sheet)
In order to quickly transfer the body fluid that has permeated through the top sheet 30 to the absorbent body, an intermediate sheet 40 that is generally referred to as a “second sheet” that has a higher body fluid permeation rate than the top sheet 30 can be provided. The intermediate sheet 40 not only improves the absorption performance by the absorbent body by quickly transferring the body fluid to the absorbent body, but also prevents the “reversal” phenomenon of the absorbed body fluid from the absorbent body, and the top sheet 30 is always dried. It can be made into the state which carried out. The intermediate sheet 40 can be omitted.

  Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlace, pulp nonwoven fabric, a mixed sheet of pulp and rayon, point bond, or crepe paper. In particular, an air-through nonwoven fabric and a spunbond nonwoven fabric are preferable.

  The intermediate sheet 40 in the illustrated form is disposed in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the longitudinal direction may be the same as the length of the absorbent body 56 or may be within a short length range centered on the region that receives the body fluid. A typical material for the intermediate sheet 40 is a nonwoven fabric having excellent body fluid permeability.

  (Body fluid impermeable sheet)

  The body fluid impermeable sheet 70 simply means a sheet disposed on the back surface side of the absorber 56. In this embodiment, the body fluid impermeable sheet 70 is a sheet in which the absorber 56 is interposed between the top sheet 30. Therefore, the material of the main body liquid impermeable sheet is not particularly limited. Specifically, for example, an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, a nonwoven fabric that substantially ensures liquid impermeability by interposing a waterproof film (in this case, A body fluid impermeable sheet is comprised with a waterproof film and a nonwoven fabric.) Etc. can be illustrated. Of course, in addition to this, materials having liquid impermeability and moisture permeability, which have been used and used in recent years from the viewpoint of preventing stuffiness, can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given.

  The body fluid impervious sheet 70 can be prevented from side leakage of body fluid by extending it to the use surface in a so-called framed form (not shown), but in this embodiment, the barrier cuff 60 is used for side leakage. This is prevented by interposing the second body fluid impermeable sheet 72 between the double barrier sheets 64 that form the structure. According to this embodiment, since the second body fluid impermeable sheet 72 extends until the barrier cuff 60 stands up, the body fluid diffused laterally through the top sheet 30 and the side of the soft stool between the barrier cuffs 60, 60 There is also an advantage that leakage can be prevented.

  The bodily fluid impermeable sheet 70 can be provided with a display section for a product name, a function description, a character, a pattern, and the like, and this display section may have a notification function for informing that urination has occurred.

(Barrier cuffs)
Barrier cuffs 60, 60 provided on both sides of the product are provided to prevent urine and soft stool that travel laterally along the top sheet 30 and prevent side leakage. It is.

  The illustrated barrier cuff 60 is a doubled water-repellent non-woven sheet, and is formed so as to protrude from the back side of the absorbent body 56 to the lower side of the top sheet 30 and to protrude to the front side. Yes. In order to prevent urine moving in the lateral direction along the top sheet 30, in particular, the side part of the body fluid impermeable sheet 70 is inserted between the double nonwoven fabric sheets, and the barrier cuff 60 protruding from the surface side is provided. It extends halfway.

  The shape of the barrier cuff 60 itself can be designed as appropriate. However, in the example shown in the drawing, an elastic elastic member, for example, a rubber thread 62 is fixed to the tip and middle of the protruding portion of the barrier cuff 60 under stretch, The barrier cuff 60 stands up due to the contraction force in use. As shown in FIG. 3, the intermediate cuff rubber 62 is positioned on the center side of the front end cuff rubber 62, 62 and is fixed to the front / rear end of the top sheet 30 in the front / rear direction. The base side rises obliquely toward the center side, and the tip end portion rises obliquely outward from the intermediate portion.

(Absorption element)
The absorbent element 50 includes an absorbent body 56 and a covering sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The covering sheet 58 can be omitted. Further, in the illustrated embodiment, the holding sheet 80 is provided between the absorber 56 and the back surface side portion (lower part) of the covering sheet 58, but the holding sheet 80 may be omitted.

(Absorber)
As the absorbent body 56, in addition to short fibers such as cotton-like pulp, those made of aggregates of filaments 52, 52.

  The aggregate of filaments 52, 52... Can be obtained by opening a tow (fiber bundle). Examples of tow fibers include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, polylactamamide, polyvinyl acetate, etc.). In particular, cellulose esters and cellulose are preferable.

  As cellulose, cellulose derived from plants such as cotton, linter, and wood pulp, bacterial cellulose, and the like can be used. Regenerated cellulose such as rayon may be used, and the regenerated cellulose may be a spun fiber.

  Examples of cellulose esters that can be suitably used include organic acid esters such as cellulose acetate, cellulose butyrate, and cellulose propionate; mixed acid esters such as cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose nitrate acetate. And cellulose ester derivatives such as polycaprolactone-grafted cellulose ester can be used. These cellulose esters can be used alone or in admixture of two or more. The viscosity average degree of polymerization of the cellulose ester is, for example, about 50 to 900, preferably about 200 to 800. The average substitution degree of the cellulose ester is, for example, about 1.5 to 3.0 (for example, 2 to 3).

  The average degree of polymerization of the cellulose ester can be, for example, 10 to 1000, preferably 50 to 900, more preferably about 200 to 800, and the average degree of substitution of the cellulose ester is, for example, about 1 to 3, preferably 1 to 1. 2.15, more preferably about 1.1 to 2.0. The average degree of substitution of the cellulose ester can be selected from the viewpoint of enhancing biodegradability.

  As the cellulose ester, an organic acid ester (for example, an ester with an organic acid having about 2 to 4 carbon atoms), particularly cellulose acetate is suitable. The degree of acetylation of cellulose acetate is often about 43 to 62%, but about 30 to 50% is particularly preferable because it is excellent in biodegradability. A particularly preferred cellulose ester is cellulose diacetate.

  The tow constituent fiber may contain various additives such as a heat stabilizer, a colorant, an oil agent, a yield improver, a whiteness improver, and the like.

  The fineness of the tow constituting fiber is, for example, 1 to 16 denier, preferably 1 to 10 denier, and more preferably 1 to 6 denier. The tow constituent fiber may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. When crimped fibers are used, a bulky and light absorbent body can be produced, and a tow with high unity can be easily produced by entanglement between the fibers. The cross-sectional shape of the tow constituting fiber is not particularly limited, and may be any one of, for example, a circular shape, an oval shape, an irregular shape (for example, a Y shape, an X shape, an I shape, an R shape) or a hollow shape. Also good. The tow constituting fibers are used in the form of tows (fiber bundles) formed by bundling, for example, about 1,000 to 1,000,000, preferably about 2,000 to 1,000,000 single fibers. can do. The fiber bundle is preferably formed by bundling about 1,000 to 1,000,000 continuous fibers.

Cellulose diacetate tow bales that can be suitably used in the present invention are commercially available from Celanese and Daicel Chemical Industries. Cellulose diacetate tow bale has a density of about 0.5 g / cm ³ and a total weight of 400-600 kg. From this bale, the tow is peeled off and spread into a wide band so as to have a desired size and bulk. The opening width of the tow is arbitrary, and can be, for example, a width of 50 to 2000 mm, preferably about 50 to 300 mm, which is the width of the product absorber. Moreover, the density of an absorber can be adjusted by adjusting the degree of tow opening.

  Preferably, as shown in FIG. 3, superabsorbent polymer particles 54, 54. It is desirable that at least in the body fluid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of continuous fibers 52, 52. The state of being substantially dispersed throughout the thickness direction is conceptually shown as an enlarged view of the main part of FIG.

  If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed throughout the thickness direction” means “distributed unevenly in the upper, lower, and / or middle portions of the continuous fiber aggregate in addition to the form“ uniformly ”distributed throughout the thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles remain on the surface of the continuous fibers 52, 52... Without entering the aggregate, and some SAP particles pass through the aggregate of continuous fibers 52, 52. The form on the covering sheet 58 and the form on the holding sheet 80 as will be described later are not excluded.

(Superabsorbent polymer particles)
In the form using the superabsorbent polymer 54, the superabsorbent polymer particle 54 includes “powder” in addition to “particle”. As the particle diameter of the superabsorbent polymer particles 54, those used for this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles 54 can be used without any particular limitation, but those having a water absorption of 50 g / g or more are suitable. Examples of the superabsorbent polymer particles 54 include starch-based, cellulose-based and synthetic polymer-based polymers, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethylcellulose. A cross-linked product or an acrylic acid (salt) polymer can be used. The shape of the superabsorbent polymer particles 54 is preferably a granular material that is usually used, but other shapes can also be used.

  As the superabsorbent polymer particles 54, those having a water absorption speed of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the body fluid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

  Moreover, as the superabsorbent polymer particles 54, those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the stickiness after a bodily fluid absorption can be suppressed effectively.

The basis weight of the superabsorbent polymer particles 54 can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . By setting the basis weight of the polymer to 50 g / m ² or less, it is possible to prevent the lightening effect from being hardly exhibited by adopting the synthetic continuous fiber due to the weight of the polymer. If it exceeds 350 g / m ² , not only will the effect be saturated, but an excessively high superabsorbent polymer particle 54 will give a sense of incongruity.

  If necessary, the superabsorbent polymer particles 54 can adjust the spray density or spray amount in the plane direction of the absorber 56. For example, the body fluid excretion site can be applied in a larger amount than other sites. When gender differences are taken into account, men can increase the front spray density (amount), and women can increase the spray density (amount) in the front-rear center. In addition, a portion where no polymer exists locally (for example, in a spot shape) in the planar direction of the absorber 56 can also be provided.

  If necessary, as the superabsorbent polymer particles 54, a plurality of particles having different particle size distributions are prepared, sequentially supplied in the thickness direction, those having a small particle size distribution on the lower side in the absorber 56, and particles having a large particle size distribution on the upper side. Things can be distributed.

  The ratio between the superabsorbent polymer particles 54 and the continuous fibers determines the absorption characteristics. As a weight ratio in a planar area of 5 cm × 5 cm in the region directly receiving the body fluid in the absorbent body 56, it is desirable that the superabsorbent polymer particle / continuous fiber weight is 1 to 14, particularly 2 to 9.

(Absorber size / weight)
On the other hand, the size of the absorber 56 is preferably such that the planar projection area is 400 cm ² or more and the thickness is 1 to 10 mm, particularly 1 to 5 mm. When the size of the absorbent body 56 is within this range, it is extremely advantageous in improving the resilience without increasing the weight, thickness, and cost. The weight of the absorber 56 is preferably 35 g or less, particularly 10 to 30 g. When the weight of the absorber 56 is within this range, the advantage of not using a dedicated member becomes particularly significant.

(Compressive properties of absorber)
The compression resilience RC of the absorbent body 56 is preferably 40 to 60%, particularly 50 to 60%. Thereby, sufficient restoring property can be exhibited with the absorber itself.

Furthermore, it is preferable that the compression energy WC of the absorbent body 56 is 4.0 to 10.0 gf · cm / cm ² , since it can be compressed compactly to the same level as before or during packaging.

  These compression characteristics can be adjusted by adjusting the fiber density of the aggregate of continuous fibers by opening or the like, selecting the fiber material, selecting the type of binder such as a plasticizer, adjusting the degree of processing, or a combination thereof. .

  Here, the compression energy (WC) is an energy consumption amount when pressing the center part of the test piece cut to a length of 200 mm and a width of 50 mm up to 50 g.

This compression energy can be measured by a handy compression tester (KES-G5, manufactured by Kato Tech). The measurement conditions in the case of this testing machine are: SENS: 2, force meter type: 1 kg, SPEED RANGE: STD, pressure area: 2 cm ² , take-in interval: 0.1 (standard), STROKE SET: 5.0 The upper limit load is 50 gf / cm ² .

  On the other hand, the compression resilience (RC) is a parameter representing the recoverability when the fiber is compressed. Therefore, if the recoverability is good, the compression resilience increases. This compression resilience can be measured with a handy compression tester (KES-G5, manufactured by Kato Tech). The measurement conditions for this tester are the same as for the compression energy.

(Enveloping sheet)
When the covering sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  As shown in FIG. 3, the covering sheet 58 wraps only the back and side surfaces of the layer of the continuous fibers 52, 52... And the superabsorbent polymer particles 54, 54. It may be covered. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or nonwoven fabric, and the lower surface is covered with a body fluid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or nonwoven fabric. For example, the lower surface may be covered with a body fluid impermeable sheet such as polyethylene (each of these materials becomes a component of the covering sheet). If necessary, the aggregate of continuous fibers 52, 52... And the layer of superabsorbent polymer particles 54, 54... May be sandwiched between two upper and lower sheets or disposed only on the lower surface. This is not a desirable form because it is difficult to prevent the movement of particles.

(Holding sheet)
In the case where the holding sheet 80 is provided, the superabsorbent polymer particles 54 can be interposed between the holding sheet 80 and the absorbent body 56 by spraying or the like. The superabsorbent polymer particles 54 may pass through the aggregate of continuous fibers 52 at the time of supply to the aggregate of continuous fibers 52 or in a subsequent process, or in a distribution process until use by a consumer. The unevenness of the superabsorbent polymer particles that have passed through the aggregate of continuous fibers gives a sense of incongruity when touched by the hand when the consumer uses it. Therefore, it is also a preferable form that a holding sheet 80 having a holding performance of the superabsorbent polymer 54 is interposed between the absorbent body 56 and the covering sheet 58. The holding sheet 80 reinforces the stiffness that is not sufficient only by the covering sheet 58 such as tissue paper (crepe paper), and reduces or prevents a sense of incongruity when touched by the hand when the consumer uses it.

  The material of the holding sheet 80 is not particularly limited as long as it has a holding performance of the superabsorbent polymer 54. Specifically, for example, non-woven fabric, crimped pulp, low-absorbency cotton fiber (for example, non-degreased cotton fiber, degreased cotton fiber, rayon fiber treated with a water repellent or a hydrophobizing agent, etc.). ), Polyethylene fiber, polyester fiber, acrylic fiber, polypropylene fiber, silk, cotton, hemp, nylon, polyurethane, acetate fiber and the like.

If the holding sheet 80 and the nonwoven fabric, its holding sheet 80, the compression energy 0.01~10.00gfcm / cm ² based on KES test, preferably, at 0.01~1.00gfcm / cm ^2, and compressed The non-woven fabric has a resilience of 10 to 100%, preferably 70 to 100%.

  The reason for providing the holding sheet 80 is to hold, for example, the superabsorbent polymer 54 that has fallen down (dropped out) from the absorbent body 56 as described above. Therefore, since the superabsorbent polymer particles 54 that have come out come into contact with the user via the covering sheet 58 and the holding sheet 80, there is no possibility of being transmitted to the user as a sense of incongruity. In particular, when the nonwoven fabric has the above-described compression energy and compression resilience, its function is sufficiently exhibited.

  Further, since the superabsorbent polymer 54 that has slipped out is held by the holding sheet 60 and does not move on the covering sheet 58, there is no possibility of uneven distribution of absorption capacity. In particular, in order to prevent the superabsorbent polymer particles 54 from moving on the holding sheet 80, an adhesive hot melt adhesive or the like can be applied on the holding sheet 80 in advance. Alternatively, the upper surface of the holding sheet 80 (surface toward the use surface side) may be a rough surface to prevent the superabsorbent polymer particles 54 from moving on the holding sheet 80. Examples of the roughening or fluffing means for this purpose include a non-net surface that is not a net surface during the production of the nonwoven fabric, a marble process, a needle punch process, and a brushing process.

  The holding sheet 80 may be provided only below the absorber 56 as shown in FIG. 3 or the like, or may be wound up and extended to the upper surface of the absorber 56 through the side surface of the absorber 56 (not shown). . It is also possible to use a plurality of holding sheets 80 in a stacked manner.

  The above example is an example in which the holding sheet 58 is provided between the absorber 56 and the back side portion of the covering sheet 58, but the holding sheet may be on the back side from the covering sheet (the form is shown in the figure). In short, if a holding sheet is provided on the back side with respect to the absorbent body 56, it is possible to reduce or not cause a crisp discomfort when touching from the back side of the product.

(Embossing)
Although not shown in the drawings, a recess E by embossing may be formed in the thickness direction from the surface side of the top sheet 30. In this case, the embossed recess E is formed only on the top sheet 30, the embossed recess E is formed on both the top sheet 30 and the intermediate sheet 40, or the thickness of the absorber 56 is increased from the surface side of the top sheet 30. A recess by embossing can be formed so as to reach a part or almost the entire length. In order to form the recesses E by embossing on both the top sheet 30 and the intermediate sheet 40, the intermediate sheet 40 has a basis weight of 10 to 80 g / m ² , a thickness of 0.2 to 5 mm, and the top sheet 30 It is desirable that the basis weight is in the range of 10 to 40 g / m ² and the thickness is in the range of 0.2 to 5 mm because embossing can be sufficiently performed under the condition that does not impair liquid permeability.

  Moreover, you may form the recessed part by embossing only in the intermediate sheet 40, without forming a recessed part in the top sheet 30, and also emboss only in the absorption element 56, without forming a recessed part in the top sheet 30 and the intermediate sheet 40. In addition, the embossed recess may be formed only in the absorbent body 58 without forming the recess in the top sheet 30, the intermediate sheet 40, and the covering sheet 58.

  The recess E has an effect of inducing and diffusing body fluid in the direction in which the recess E extends. Therefore, when the recesses E are substantially continuous in a groove shape (including the case where a plurality of recesses are arranged at intervals and form a single groove), the body fluid reaches the absorber before reaching the absorber. It becomes diffused along the recess E, so that a wider part of the absorber can be used for absorption. Therefore, the absorption capacity of the entire product is increased, and the pants-type disposable diaper is less likely to cause side leakage or reversal due to insufficient absorption capacity.

  On the other hand, the absorbent body 56 made of continuous fibers is likely to be less rigid than the conventional pulp material, but it is preferable to form a recess by embossing in the absorbent body 56 because the rigidity can be increased. Although not shown, in order to increase the rigidity of the absorbent element 50, it is also a preferred form to form a concave portion by embossing in the thickness direction from the back surface side (the side opposite to the top sheet 30 side) of the absorbent body 56. In order to form the recess on the back surface side, embossing is integrally performed so as to reach the absorber 56 from the back surface side of the holding sheet 80, the covering sheet 58, the body fluid impermeable sheet 70 or the exterior sheet 12. Can do. Moreover, it is preferable to form such a concave portion on the back surface side together with the concave portion E on the front surface side, but it is also possible to form only the concave portion on the back surface side without forming the concave portion E on the front surface side. When the concave portions are provided on both the front and back sides, the shape of the concave portions may be common to the front and back sides, or may be different from each other.

  The embossed recess has the effect of inducing and diffusing body fluid in the extending direction. It also has the effect of increasing rigidity. Therefore, it is desirable to determine the shape of the embossed recess in consideration of these effects. For example, the recesses are substantially continuous in the shape of a groove (including the case where a plurality of recesses are arranged in a row and form a single groove), and the plurality of recesses are arranged in a dotted pattern at intervals. It may be. In addition, as the planar pattern, groove-shaped or dot-shaped concave portions are arranged in the longitudinal direction, the width direction, a lattice shape combining these, a zigzag shape (zigzag shape) reciprocating in the width direction, or irregularly arranged. Forms can be taken. Furthermore, appropriate forms such as a pin shape, a Mt. Fuji shape, and a bellows shape can be adopted.

(Other)
In addition, although not shown in figure, each structural member of the absorption part 20 is mutually fixed by solid, beads, spiral application, etc., such as a hot-melt-adhesive.

<Second form (reference form)>
As shown in FIGS. 6 and 7, the second form is provided with leg-around elastic members 12X and 12X along both leg-around edges 12E in the intermediate portion L, and the others are the same as the first form. It is the same.

  In this embodiment, the leg elastic members 12X and 12X are provided not only in the front-rear direction in the intermediate portion L but only in the center region in the front-rear direction, and the elastic members 12X, 12X and The permeability improving portion 12P not having the inner layer 12H is formed. That is, the permeability improving part can be provided only at one place in the front-rear direction of the pants-type disposable diaper, for example, the crotch part. In this form, the permeability improving part 12P is spaced in the front-rear direction of the pant-type disposable diaper. A plurality of them are provided with a gap between them, and the permeability is exhibited with a good balance. In this case, the total length in the front-rear direction of the permeability improving portion 12P (the sum of the lengths of the respective permeability improvements) is 30% or more, particularly 35-65% or more of the length in the front-rear direction of the pants-type disposable diaper. Is preferred.

<Third form (reference form)>
In the first embodiment, the permeability improving portion 12P is provided only in the intermediate portion L. However, as shown in FIGS. 8 and 9, the waist improving portion 12P can also be provided with the permeability improving portion 12P.

  In particular, as shown in the figure, the elastic stretch member 12C is provided at the waist opening side end and the intermediate side end of the waistline portion W to ensure sufficient fit, and the portion between them is permeable. It is a preferable form to provide the improvement part 12P and improve the permeability. Although not shown, the lower portion of the waistline portion W excluding the waist opening side end portion can be used as the permeability improving portion, or substantially the entire portion can be used as the permeability improving portion.

  In the illustrated embodiment, a plurality of permeability improving portions 12P are provided at intervals in the front-rear direction of the pants-type disposable diaper as in the second embodiment. In this case, the front-rear direction of the permeability improving portion 12P is provided. Is preferably 30% or more, particularly 35 to 65% or more of the length in the front-rear direction of the pants-type disposable diaper. Others are the same as the first embodiment.

<4th form>
The transparency improving unit 12P also improves the light transmittance. Therefore, as shown in FIGS. 4 to 9, it is also preferable to provide a display unit 13 that displays a product name, a function description, a character, a pattern, and the like so as to be visible through the transparency improving unit 12 </ b> P.

  The display unit 13 can be provided by sticking or printing a display sheet provided with display contents by printing or the like on the back surface of the absorption unit 20 or the absorption unit side surface of the exterior sheet 12 as shown in the drawing.

  As shown in FIGS. 8 and 9, the display unit 13 is preferably located entirely within the transparency improving unit 12P as shown in FIGS. 8 and 9, but part of the display unit 13 is located within the transparency improving unit 12P as shown in FIGS. You can just do it.

  In the present invention, the display unit 13 may not be provided.

<5th form>
Although not shown, contrary to the first embodiment, the inner layer 12H can be left in the permeability improving portion 12P and the outer layer 12S can be omitted. In this case, similarly to the inner layer 12H of the first embodiment, the outer layer 12S is individually provided on each of the front end side portion W and the rear end side portion W in the front-rear direction of the exterior sheet 12, and these outer layers are in the deployed state. 12S and 12S can be configured not to overlap each other.

<6th form (reference form)>
In the first embodiment, the outer layer 12S in the permeability improving portion 12P is also omitted. That is, as shown in FIGS. 10 and 11, the outer layer 12S, the inner layer 12H, and the elastic elastic member 12C are not included. The permeability improving part 12P can also be configured.

<Seventh form>
As shown in FIGS. 12 and 13, the seventh embodiment is provided with leg elastic elastic members 12 </ b> Y and 12 </ b> Z along the legs around each of the ventral side 12 </ b> F and the dorsal side 12 </ b> B. This is a form in which a permeability improving portion 12P having no elastic elastic member 12Z and inner layer 12H is formed in the region. In this embodiment, since it is difficult to secure the area of the transparency improving portion 12P, it is preferable to provide the transparency improving portion 12P in the waistline portion W as in the third embodiment as in the illustrated embodiment.

  In the illustrated embodiment, a plurality of permeability improving portions 12P are provided at intervals in the front-rear direction of the pant-type disposable diaper. In this case, the total length in the front-rear direction of each permeability improving portion 12P (each permeability The total length of the improvement) is preferably 30% or more, particularly 35 to 65% or more of the length in the front-rear direction of the pants-type disposable diaper.

  When the elastic elastic member 12Z around the legs is provided on the back side 12B, the crotch portion or the vicinity thereof is reached from the side end portion on one side along the periphery of the leg as shown in the figure in order to improve the fit to the swelling of the buttocks. Thereafter, it is preferable to provide the elastic elastic member 12Z so as to pass through the crotch portion or the vicinity thereof and reach around the other leg and continue to the other side end along the other leg. When such a continuous arrangement is adopted, in addition to the substantially V-shaped arrangement protruding to the crotch side as shown in FIG. 12, there is also a substantially U-shaped arrangement protruding to the crotch side as shown in FIG. preferable.

  On the other hand, when the elastic stretchable member 12Y is provided on the ventral side 12F, in order to prevent the bulkiness caused by the bulging of the ventral side unnecessarily, the elastic stretchable members 12Y, 12Y, that is, an elastic elastic member 12Y extending from one side end portion to the crotch portion or the vicinity thereof around the one leg portion, and from the other side end portion to the other leg portion. It is preferable that the elastic elastic member 12Y extending to the crotch portion or the vicinity thereof is provided separately, and the elastic members 12Y and 12Y are discontinuous at the intermediate portion in the width direction.

  However, depending on the case, the elastic elastic members around the legs on the back side 12B are provided independently on the left and right sides, or the elastic elastic members around the legs on the ventral side 12F are provided continuously from one side edge to the other side edge. You can also

  In the illustrated embodiment, the elastic expansion / contraction member 12Y on the ventral side 12F and the elastic expansion / contraction member 12Z on the back side 12B are different in arrangement, but they may be the same or similar.

  Further, when the elastic elastic members around the legs are provided, a single rubber thread or the like as shown in the figure may be provided, and a plurality of elastic members may be provided in parallel or in a bundle.

<Eighth form>
Since the permeability in the permeability improving part is improved, odors such as urine, feces, sweat and the like are easily released to the outside. Therefore, it is also proposed to apply a deodorant so as to come in contact with odors that are directed from the absorption unit 20 to the outside through the permeability improving unit 12P.

  Specifically, members that come in contact with odors that are directed to the outside from the absorbing portion 20 through the permeability improving portion 12P, that is, the absorber 56, the covering sheet 58, the body fluid impermeable sheets 70 and 72, the barrier sheet 64, and the holding sheet 80. The inner sheet 12H and the outer sheet 12S preferably contain a deodorant.

The deodorant is not particularly limited, and for example, an antibacterial deodorant zeolite obtained by substituting part or all of the ion-exchangeable ions in the zeolite with silver ions can be preferably used. As the basic zeolite, both natural and synthetic zeolite can be used, but synthetic zeolite is preferred from the viewpoint of cost and availability. Zeolite is an aluminosilicate having a three-dimensional framework structure, and the one represented by the general formula M _{2 / n} 0 ·· Na ₂ O · Al ₂ O ₃ · 2.5SiO ₂ · xH ₂ O is preferably used. Can do. X in the formula is an integer representing the number of water of crystallization. M is a cation, and the cation M preferably contains silver ions and zinc ions. N in the above formula is the valence of the cation. Specific examples of zeolite include, for example, A-type zeolite, X-type zeolite, Y-type zeolite, T-type zeolite, high-silica zeolite, etc., and A-type zeolite, X-type zeolite, and Y-type in that the deodorizing effect is excellent. Zeolite is preferable, and A-type zeolite is particularly preferable.

  What is necessary is just to determine suitably the provision method of antibacterial deodorant zeolite. For example, in addition to mixing particles or powder in the fiber of the absorbent body 56 or interposing between the absorbent body 56 and the covering sheet 58, the fiber constituting the target member is a synthetic fiber. In some cases, a method of adding and kneading particulate or powdered antibacterial deodorant zeolite to the raw material during the fiber spinning process may be employed. In addition, in order to attach the antibacterial deodorant zeolite to the target member after the production of the target member, the particulate or powdered antibacterial deodorant zeolite is applied to paints such as acrylic, urethane, epoxy, silicone, and various inks. It is also possible to employ a method of applying the dispersed material to the target member.

  The particle diameter of the antibacterial deodorant zeolite is not particularly limited, but the average particle diameter is usually 0.1 to 10 μm, preferably 0.3 to 5 μm, particularly preferably 0.6 to 2.5 μm. Use. If the average particle size is too small, handling becomes difficult, and if the average particle size is too large, the deodorizing effect decreases due to the reduction in surface area.

  From the viewpoint of surface area, the pore diameter of porous particles such as zeolite is usually 1 to 10 angstroms, preferably 3 to 10 angstroms. If the pore size is too large, the effect is reduced due to a reduction in the surface area, and if it is too small, the adsorption ability of the odor-generating substance having a large molecular size is lowered.

  As an equivalent to the antibacterial deodorant zeolite described above, Zeomic (registered trademark) manufactured by Sinanen Zeomic Co., Ltd. can be used.

  The amount of deodorant used can be appropriately determined according to the performance of the deodorant, the type and size of the pants-type disposable diaper, and the target absorption performance (for example, increasing the amount used in an adult diaper). . In particular, when the antibacterial deodorant zeolite is used in a paper diaper, it is preferable to contain 0.02 to 2.0% by weight of the antibacterial deodorant zeolite per product. If the content of the antibacterial deodorant zeolite is too small, the deodorizing effect is insufficient, and if it is too much, the cost effectiveness is lowered.

  <Ninth form (reference form)>

  For example, as shown in FIG. 15, a center panel 12N that forms a central portion in the width direction from the front portion 12F to the rear portion 12B, and a pair provided on both sides of the front portion 12F and both sides of the rear portion 12B in the center panel 12N. Side panels 12L and 12R as exterior parts, the side panels 12L and 12R are composed of an inner layer 12H made of nonwoven fabric, an outer layer 12S made of nonwoven fabric, and an elastic stretch film 12G sandwiched between these layers, There is known a paper diaper 11 in which side panels 12L and 12R on both sides of a front part 12F are respectively connected to corresponding side panels 12L and 12R on both sides of a rear part 12B. The outer layer 12S of the side panels 12L and 12R and the outer layer of the center panel 12N can be formed of an integral nonwoven fabric.

  In such a paper diaper 11, in order to ensure the transparency of the side panels 12L and 12R, a large number of minute slits are arrayed in the elastic stretch film 12G. By providing the stretchable film 12G and the permeability improving portion 12P that does not have at least one of the outer layer 12S and the inner layer 12H, the permeability can be further improved.

  The permeability improving portion 12P can be formed by previously cutting the elastic stretch film 12G and at least one of the outer layer 12S and the inner layer 12H. Since the side panel is a portion that directly contacts the skin, when the permeability improving portion 12P that does not include the inner layer 12H is provided, the boundary between the portion that includes the inner layer 12H and the portion that does not include the inner layer 12H contacts the skin. Therefore, as in the illustrated example, it is preferable to leave the entire inner layer 12H and provide a permeability improving portion 12P that does not include the outer layer 12S and the elastic stretch film 12G.

  The site where the permeability improving portion 12P is formed in the side panels 12L and 12R is arbitrary, but in order to ensure stretchability in the waistline direction, at least one portion where the elastic stretch film 12G is continuous in the width direction is at least one in the vertical direction, In particular, it is preferably left at the upper end, and more preferably left at a plurality of positions with a space in the vertical direction. Therefore, the permeability improving portion 12P is a portion excluding the portion having the elastic stretchable film 12G, that is, preferably at one location in the middle portion in the vertical direction of the side panels 12L and 12R, or at a plurality of locations at intervals in the vertical direction. Can be provided.

  Since the other points are the same as those of the above-described various embodiments, the description will be omitted. However, it goes without saying that the above-described various configurations can be applied within the scope of the ninth embodiment.

  The present invention is suitable for a pants-type disposable diaper.

  DESCRIPTION OF SYMBOLS 10 ... Pants type disposable diaper, 10A ... Tape type disposable diaper, 12 ... Exterior sheet, 12A ... Joining region, 12E ... Leg circumference, 12S ... Outer layer, 12H ... Inner layer, 12C ... Elastic elastic member, 12P ... Permeability Improvement part, 13 ... Display part, 20 ... Absorbing part, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 52 ... Continuous fiber, 53 ... Body fluid diffusion layer, 52X ... Bale, 52Y ... Tow, 52Z ... Continuous Aggregation of fibers, 54 ... superabsorbent polymer particles, 56 ... absorber, 56A ... first continuous fiber layer, 56B ... second continuous fiber layer, 58 ... enveloping sheet, 60, 60A ... barrier cuff, 64 ... Barrier sheet, 70 ... Body fluid impermeable sheet, 72 ... Second body fluid impermeable sheet, 80 ... Holding sheet.

Claims (6)

An outer layer having at least a gas permeability and a visible light permeability, an inner layer having at least a gas permeability and a visible light permeability, and an elastic elastic member interposed therebetween, and the exterior An absorption part provided on the body side of the part for absorbing and holding body fluids,
The exterior portion includes a front end side portion located on the front end side, a rear end side portion located on the rear end side, and an intermediate portion between them, and both side edges of the intermediate portion are legs that follow the legs of the adherend. Each is formed as a peripheral edge, and the front end side portion and the rear end side portion are formed as a waistline portion along the waistline of the adherend,
In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed by joining both sides on the ventral side and both sides on the back side of the exterior part,
Each of the abdominal side and the back side of the exterior part is provided with a leg elastic elastic member along the leg circumference, and a belly elastic elastic member and a back elastic elastic member of the back side in the intermediate part. Are spaced apart in the front-rear direction,
The exterior portion includes an elastic elastic member and one of an outer layer and an inner layer in a separation area between the belly side elastic elastic member and the back leg elastic elastic member in the intermediate portion. A permeation improving portion that extends over the entire width of the exterior portion along the width direction of the pants-type disposable diaper within a range overlapping the absorbent portion in the front-rear direction of the pants-type disposable diaper A pants-type disposable diaper characterized by The pants-type disposable diaper according to claim 1, wherein the exterior portion includes a permeability improving portion that does not include an elastic elastic member and any one of an outer layer and an inner layer in the waist portion.   The underpants type disposable diaper of Claim 1 or 2 whose area of the part which the said transparency improvement part overlaps with the back surface of the said absorption part is 30% or more with respect to the area of the whole back surface of the said absorption part.   The underpants type disposable diaper of any one of Claims 1-3 in which the display part is provided so that it can visually recognize through the said transparency improvement part. Wherein the inner layer and the outer layer, 0.5 to 15 g / m ² of which is bonded by a hot melt adhesive applied at a rate, pants type disposable according to any one of claims 1 to 4 Diapers.   The underpants type disposable diaper of any one of Claims 1-5 which provided the deodorizer so that it might contact with the odor which goes outside through the said permeability improvement part from the said absorption part.

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