JP6901313B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles such as disposable diapers.

Conventionally, disposable diapers have been known in which a sheet or the like that absorbs sweat is provided on the surface of the disposable diaper that comes into contact with the skin to effectively prevent the occurrence of eczema, heat rash, rash, etc. (for example, Patent Document 1).

In Patent Document 1, in order to absorb sweat, a hydrophobic first fiber non-woven fabric is superposed on the skin contact side and a hydrophilic second fiber non-woven fabric is superposed on the skin non-contact side, and the heat-sealed portion is used. Disposable diapers in which fixed composite sheets are provided on end flaps and side flaps are disclosed. Further, Patent Document 1 describes that the composite sheet is formed with a large number of heat-sealed portions recessed in the direction from the skin contact side to the skin non-contact side.

As another technique, Patent Documents 2 to 3 have a structure in which a hydrophobic fiber layer and a hydrophilic fiber layer are layered and overlapped, and the hydrophobic fiber layer side is arranged on the skin contact surface side. The laminated non-woven fabric used in the above is disclosed.

Japanese Unexamined Patent Publication No. 2004-298467 JP-A-2002-20957 Japanese Unexamined Patent Publication No. 9-31823

However, the so-called sweat-absorbent sheet provided with the disposable diaper described in Patent Document 1 cannot absorb small sweat droplets at the beginning of scratching, and cannot prevent skin troubles such as eczema, heat rash, and rash. There was room for further improvement.

Further, Patent Document 2 and Patent Document 3 do not describe anything about arranging the laminated non-woven fabric in the stretchable region of an absorbent article such as a disposable diaper.

Therefore, the present invention is to provide an absorbent article capable of eliminating the above-mentioned drawbacks of the prior art.

The present invention is an absorbent article provided with a stretchable region, wherein the stretchable region has a sweat-absorbing quick-drying sheet composed of at least two layers on the skin contact surface side thereof, and the sweat-absorbing quick-drying sheet is provided. The sheet is hydrophilic composed of a hydrophobic hydrophobic layer composed of hydrophobic fibers forming a skin contact surface and hydrophilic fibers arranged adjacent to the non-skin contact surface of the hydrophobic layer. The sweat-absorbing quick-drying sheet has a hydrophobic layer and a plurality of fusion-bonded portions for fixing the hydrophilic layer, and the sweat-absorbing quick-drying sheet covers an area of 5 cm × 5 cm on the skin contact surface. When the arranged 1 μL × 49 drops of liquid are absorbed in 60 seconds, the remaining amount of the liquid is 10 mg or less, and the 50 μL × 1 drop of liquid placed on the skin contact surface is within 15 minutes. It provides an absorbent article, which is a sheet that evaporates.

According to the present invention, it is possible to absorb small sweat droplets at the beginning of scratching and reduce skin troubles such as eczema, heat rash, and rash by achieving both sweat absorption and quick drying of sweat.

FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment of the absorbent article of the present invention. FIG. 2 is a developed plan view of the unfolded and stretched state of the diaper shown in FIG. 1 as viewed from the skin contact surface side. FIG. 3 is a cross-sectional view of the sweat-absorbing and quick-drying sheet in the cross section taken along line III-III shown in FIG. FIG. 4 is a sectional view taken along line IV-IV shown in FIG. FIG. 5 is an enlarged cross-sectional view showing a cross section of the waist elastic portion of the diaper shown in FIG. 1 along the lateral direction (Y direction) of the exterior body. FIG. 6 is a partially enlarged plan view of the unfolded and stretched state of the diaper as viewed from the non-skin contact surface side. FIG. 7 is a cross-sectional view of a pants-type disposable diaper of another embodiment corresponding to FIG.

Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings.
The absorbent article of the present invention has a stretchable region, and the disposable diaper 1 (hereinafter, also referred to as “diaper 1”), which is a preferred embodiment of the absorbent article of the present invention, is as shown in FIG. The ventral region A and the dorsal region B and the inseam region C located between the ventral regions A and the dorsal region B are provided in the vertical direction X, and the absorber 23 is provided over the ventral region A and the dorsal region B. It also has a ventral waist flap FA and a dorsal waist flap FB that are located outward from the front and rear ends 23A and 23B of the absorber 23 in the vertical direction X and extend in the lateral direction Y. Here, the ventral area A is an area arranged on the ventral side of the wearer when wearing an absorbent article such as a disposable diaper, and the dorsal area B is an area arranged on the ventral side of the wearer when wearing an absorbent article such as a disposable diaper. It is an area arranged on the dorsal side of. Then, as shown in FIG. 2, the ventral waist flap FA is located outside the longitudinal direction X from the edge of the front end portion 23A on the ventral region A side of the absorber 23 in the longitudinal direction X, and is located in the lateral direction Y. It means a region including a region extending in the horizontal direction Y from the front end portion 23A on the ventral side region A side of the absorber 23 in the vertical direction X. Further, the dorsal waist flap FB is a region located outside the longitudinal direction X and extending in the lateral direction Y from the edge of the rear end portion 23B on the dorsal region B side of the absorber 23 in the longitudinal direction X, and absorption. It means a region including a region extending in the lateral direction Y from the rear end portion 23B on the dorsal region B side of the body 23 in the vertical direction X.

1 and 2 show a diaper 1 according to an embodiment of the absorbent article of the present invention. As shown in FIGS. 1 and 2, the diaper 1 includes an absorbent main body 2 and an outer body 3 arranged on the non-skin contact surface side of the absorbent main body 2 and fixing the absorbent main body 2. The body 3 has a ventral waist flap FA and a dorsal waist flap FB located outward from the front and rear ends 23A and 23B of the absorber 23 constituting the absorbent body 2 in the vertical direction X and extending in the lateral direction Y. doing. In diaper 1, elastic regions are formed in the ventral waist flap FA and the dorsal waist flap FB.

As shown in FIG. 2, the diaper 1 is a pair in which the left and right side edge portions 3a1, 3a1 of the ventral region A of the exterior body 3 and the left and right side edge portions 3b1, 3b1 of the dorsal region B of the exterior body 3 are joined. This is a so-called pants-type disposable diaper in which the side seal portions S, S, the waist opening WO, and the pair of leg openings LO, LO are formed (see FIG. 1). Preferably, the exterior body 3 of the diaper 1 has a ventral region A arranged on the ventral side of the wearer when worn, and the wearer's outer body 3 when worn, in a plan view of the unfolded and stretched state shown in FIG. It is divided into a dorsal region B arranged on the dorsal side and an inseam region C between the ventral region A and the dorsal region B.

As shown in FIG. 2, the above-mentioned state in which the diaper 1 is unfolded and stretched means that the side seal portion S is peeled off to bring the diaper 1 into the unfolded state, and the unfolded diaper 1 is an elastic member of each part. It means a state in which the diaper is stretched and expanded to the design dimension (the same as the dimension when the diaper is expanded in a plane with the influence of the elastic member completely excluded).

In the present specification, the "skin contact surface" is a surface of the diaper 1 or its constituent members (for example, the absorbent body 2) that is directed toward the wearer's skin side when worn, and is a "non-skin contact surface". Is a surface of the diaper 1 or its constituent members that is directed to the side opposite to the wearer's skin side (clothing side) when worn. Further, in the diaper 1, the vertical direction (X direction) is a direction extending from the ventral region A to the dorsal region B in a state of being unfolded and extended in a plane. The horizontal direction (Y direction) is a direction orthogonal to the vertical direction (X direction), and is the width direction of the diaper 1 in a state of being unfolded and extended in a plane.
Further, the diaper 1 has a symmetrical shape with respect to the vertical center line CL1 extending in the vertical direction (X direction) shown in FIG. CL2 in FIG. 2 is a horizontal center line extending in the horizontal direction (Y direction) that divides the diaper 1 into two, and is orthogonal to the vertical center line CL1.

In the diaper 1, as shown in FIG. 2, the absorbent main body 2 has a vertically long shape in which the vertical direction (X direction) is relatively long when the diaper 1 is unfolded and stretched. The absorbent body 2 includes a liquid-permeable front sheet 21 that forms a skin contact surface, a liquid-impermeable (including water-repellent) back surface sheet 22 that forms a non-skin contact surface, and both of these sheets 21. , A liquid-retaining absorber 23 interposed between 22 and 22 is provided. Further, as shown in FIG. 2, leakage-proof cuffs 24, 24 having elastic members arranged in an elongated state in the vertical direction (X direction) on both side portions of the absorbent main body 2 along the vertical direction (X direction). Is provided. Specifically, the leak-proof cuff 24 is made of a liquid-impermeable or water-repellent and breathable material, and an elastic member for forming a leak-proof cuff is located near the free end of each leak-proof cuff 24. 25 is arranged in a state of being extended in the vertical direction (X direction). When wearing a diaper, the contraction of the elastic member 25 for forming the leak-proof cuff causes the free end side of the leak-proof cuff 24 to stand up to prevent the outflow of body fluid in the lateral direction (Y direction).

As shown in FIG. 2, the absorbent main body 2 configured as described above has an exterior body in which the vertical direction (X direction) is matched with the vertical direction (X direction) of the diaper 1 in the expanded and extended state. It is joined to the central portion of No. 3 with an adhesive for fixing the main body. In this way, the exterior body 3 is arranged and adhesively fixed to the non-skin contact surface side of the back surface sheet 22 constituting the absorbent body 2 in the thickness direction of the disposable diaper 1. Therefore, in the diaper 1, the absorbent body 23 constituting the absorbent main body 2 is arranged over the ventral region A and the dorsal region B.

Regarding the absorbent article of the present invention, the stretchable region has a sweat-absorbing quick-drying sheet composed of at least two layers on the skin contact surface side thereof, and the sweat-absorbing quick-drying sheet is arranged at least on the dorsal waist flap FB. In diaper 1, as shown in FIG. 2, a sweat-absorbing quick-drying sheet KS is arranged on the dorsal waist flap FB and the ventral waist flap FA. The sweat-absorbing and quick-drying sheet KS has a hydrophobic hydrophobic layer 4 composed of hydrophobic fibers forming a skin contact surface and hydrophilic fibers arranged adjacent to the non-skin contact surface of the hydrophobic layer 4. It includes a hydrophilic hydrophilic layer 5 composed of the above, and has a plurality of fusion-bonded portions 8 for fixing the hydrophobic layer 4 and the hydrophilic layer 5. The sweat-absorbing and quick-drying sheet KS is formed by stacking a plurality of sheets in the diaper 1. Preferably, the sweat-absorbing and quick-drying sheet KS is a hydrophobic sheet (hereinafter, also referred to as a hydrophobic sheet 4) which is a hydrophobic layer 4 forming a skin contact surface in the diaper 1, as shown in FIG. It has a hydrophilic sheet (hereinafter, also referred to as a hydrophilic sheet 5) which is a hydrophilic layer 5 adjacent to a non-skin contact surface of the sex sheet 4. In diaper 1, as shown in FIG. 2, a sweat-absorbing quick-drying sheet having a hydrophobic sheet 4 and a hydrophilic sheet 5 on the skin contact surface side of the elastic region of the ventral waist flap FA and the dorsal waist flap FB, respectively. KS is arranged, and as shown in FIG. 4, the outer layer sheet 6 composed of a sheet different from the sweat-absorbing quick-drying sheet KS is folded back on the non-skin contact surface side of the sweat-absorbing quick-drying sheet KS. The portion 6R, the inner layer sheet 3i and the outer layer sheet 6 are arranged, and the folded-back portion 6R, the inner layer sheet 3i and the outer layer sheet 6 are arranged in this order toward the non-skin contact surface side.

Preferably, in the diaper 1, as shown in FIG. 2, the exterior body 3 is located outward from each of the front and rear ends 23A and 23B of the absorber 23 in the vertical direction X and extends in the lateral direction Y. It has FA and dorsal waist flap FB. Then, as shown in FIGS. 2 and 4, the exterior body 3 is an outer layer sheet 6 on the non-skin contact surface side forming the outer surface of the diaper 1, and an inner layer sheet arranged on the skin contact surface side of the outer layer sheet 6. The outer layer sheet 6 has a 3i, and the outer layer sheet 6 includes a folded-back portion 6R in which an extending portion extending from the front-rear end portion of the inner layer sheet 3i in the vertical direction (X direction) is folded back toward the skin contact surface side of the inner layer sheet 3i. ing. Then, the hydrophilic sheet 5, which is a hydrophilic layer constituting the sweat-absorbing quick-drying sheet KS, is arranged on the most skin contact surface side of the diaper 1 (the skin contact surface side of the folded portion 6R) so as to face the folded portion 6R. Has been done. This sweat-absorbing quick-drying sheet KS is a composite sheet in which a hydrophobic sheet 4 and a hydrophilic sheet 5 are fixed by a plurality of fusion-bonded portions 8.

More preferably, in the diaper 1, as shown in FIG. 2, the sheet material constituting the outer layer sheet 6 in each of the ventral region A and the dorsal region B is formed on the inner layer sheet 3i along the peripheral edge of the waist opening WO. It is folded back toward the skin contact surface side, and the folded-back portion 6R covers the front and rear end portions 23A and 23B of the absorber 23 constituting the absorbent body 2 in the vertical direction (X direction). The sweat-absorbing and quick-drying sheet KS is further arranged on the skin contact surface side of the folded-back portion 6R. As described above, the outer layer sheet 6 and the folded portion 6R of the outer layer sheet 6 and the hydrophobic sheet 4 of the sweat-absorbing quick-drying sheet KS are different sheets. In the diaper 1, the outer layer sheet 6 and the inner layer sheet 3i excluding the folded-back portion 6R are enclosed inward toward the vertical center line CL1 in the central portion in the vertical direction (X direction) as shown in FIG. 2, and are the same as each other. It is formed to the same size. The folded-back portion 6R of the outer layer sheet 6 is formed in a rectangular shape that is long in the lateral direction (Y direction). In the diaper 1, the hydrophobic sheet 4 and the hydrophilic sheet 5 are joined and fixed by a plurality of heat-sealed fusion joints 8 arranged in a scattered pattern in the lateral direction (Y direction). The long rectangular sweat-absorbing quick-drying sheet KS is overlapped with the skin contact surface of the folded portion 6R so that its lateral direction (Y direction) coincides with the lateral direction (Y direction) of the folded portion 6R of the outer layer sheet 6. The dorsal waist flap FB and the ventral waist flap FA having the sweat-absorbing quick-drying sheet KS are formed by being adhered to the skin side surface of the folded-back portion 6R of the outer layer sheet 6 with an adhesive.

In the diaper 1, as shown in FIGS. 2 and 5, the exterior body 3 extends in the horizontal direction (Y direction) between the outer layer sheet 6 and the inner layer sheet 3i in the vertical direction (X direction). It has a plurality of elastic members 71 arranged intermittently. The diaper 1 is provided with a plurality of elastic members 71 to form a waist expansion / contraction portion G1 and a waist circumference lower expansion / contraction portion G2. Further, in the diaper 1, as shown in FIG. 2, a plurality of leg elastic members 72 in an extended state are provided between the outer layer sheet 6 and the inner layer sheet 3i. The diaper 1 is provided with a plurality of leg elastic members 72 to form a leg expansion / contraction portion G3. The stretchable region of the diaper 1 has a waist stretchable portion G1, a waist circumference lower stretchable portion G2, and a leg stretchable portion G3.

In the diaper 1, as shown in FIG. 2, the waist telescopic portion G1 is formed by the front-rear end portions 23A and 23B of the absorbent body 23 constituting the absorbent body 2 in the vertical direction (X direction) in the vertical direction (X direction). It is formed on an end flap located outside the vertical direction X (opposite to the horizontal center line CL2 side) from the edge. Further, in the diaper 1, the lower waist elastic portion G2 is formed in the side flap located between the lower end of the waist elastic portion G1 on the horizontal center line CL2 side and the lower end of the side seal portion S in the vertical direction (X direction). Has been done. The dorsal waist flap FB and the ventral waist flap FA described above are also regions in which a part of the side flap (lower waist elastic portion G2) is combined with the end flap (waist elastic portion G1). Further, in the diaper 1, the leg expansion / contraction portion G3 is formed on the peripheral edge portion of the leg opening LO as shown in FIG.

Further, in the diaper 1, the outer layer sheet 6 and the inner layer sheet 3i have the outer body joint portion 32 vertically extending from the waist expansion / contraction portion G1 of each of the ventral region A and the dorsal region B to the waist circumference lower expansion / contraction portion G2. It is intermittently arranged so as to form a row along the direction (X direction), and the fusional joint row L composed of the plurality of exterior body joints 32 is spaced apart in the lateral direction (Y direction). It is arranged in multiple columns.

The exterior body joint portion 32 is formed by laminating the inner layer sheet 3i and the outer layer sheet 6 and performing heat embossing on the superposed portion to melt and solidify the overlapped portion. As the thermal embossing device, one having an embossing roll and an anvil roll and having a convex portion having a shape corresponding to the exterior body joint portion 32 on the outer peripheral surface of the embossing roll can be used. As a process for forming the exterior body joint portion 32, an ultrasonic seal, a laser, or the like can be adopted instead of the thermal embossing process.

In the diaper 1, the distance between the exterior body joints 32, 32 adjacent to each other in the vertical direction (X direction) is preferably 1 mm or more, preferably 3 mm or more, from the viewpoint of fitting the wearer's body and easily absorbing sweat. It is more preferably 20 mm or less, more preferably 18 mm or less, specifically, more preferably 1 mm or more and 20 mm or less, and more preferably 3 mm or more and 18 mm or less. preferable.
Further, the distance between the folds 3F and 3F, which will be described later, adjacent to each other in the lateral direction (Y direction) is preferably 4 mm or more, preferably 6 mm or more, from the viewpoint of improving the evaporation property of the sweat absorbed by the sweat-absorbing quick-drying sheet KS. It is more preferably 20 mm or less, more preferably 16 mm or less, specifically, 4 mm or more and 20 mm or less, and 6 mm or more and 16 mm or less. More preferred. The distance between the folds 3F adjacent to each other in the lateral direction (Y direction) means the distance between the vertices of the folds 3F adjacent to each other in the lateral direction (Y direction) when the elastic member 71 is contracted.

In the diaper 1, as shown in FIG. 2, a plurality of elastic members 71 are each fused in a region extending from the waist expansion / contraction portion G1 of each of the ventral region A and the dorsal region B to the waist circumference lower expansion / contraction portion G2. It is arranged in a lateral direction (Y direction) in an extended state through a gap between the fusion splicing portions of each of the splicing joint row L. As described above, in the diaper 1, the elastic member 71 is arranged between the outer layer sheet 6 fixed at the fusion joint and the inner layer sheet 3i to form an elastic region.

Further, in the diaper 1, as shown in FIG. 2, the outer layer sheets 6 are formed on both side edge portions 3a1, 3a1 of the ventral region A of the exterior body 3 and both side edge portions 3b1, 3b1 of the dorsal region B of the exterior body 3. The inner layer sheet 3i has a pair of outer fixing regions 3T1 and 3T1 joined via an adhesive for fixing an elastic member, and the vicinity of both side portions of the absorbent body 2 along the vertical direction (X direction). In addition, the outer layer sheet 6 and the inner layer sheet 3i have a pair of main body side fixing regions 3T2 and 3T2 joined via an adhesive for fixing an elastic member.

In the waist elastic portion G1 of the diaper 1, a plurality of elastic members 71 are arranged between the pair of outer fixed regions 3T1 and 3T1, and the elastic members 71 are arranged in the pair of outer fixed regions 3T1 and 3T1, respectively. In, while it is fixed between the outer layer sheet 6 and the inner layer sheet 3i, it is not fixed to either the outer layer sheet 6 or the inner layer sheet 3i between the pair of outer fixing regions 3T1 and 3T1.
Further, in the lower elastic portion G2 around the waist of the diaper 1, a plurality of elastic members 71 are arranged between the outer fixed region 3T1 and the main body side fixed region 3T2, and the elastic members 71 are fixed to the outside. In each of the area 3T1 and the main body side fixed area 3T2, the outer layer sheet 6 and the inner layer sheet 3i are fixed, while the outer layer sheet 6 and the main body side fixed area 3T2 are fixed between the outer fixed area 3T1 and the main body side fixed area 3T2. It is not fixed to any of the inner layer sheets 3i. In the lower elastic portion G2 around the waist of the diaper 1, the elastic member 71 is not arranged between the pair of main body side fixed regions 3T2 and 3T2, or the elastic member 71 is finely divided so as not to exhibit elastic elasticity. It is arranged in a state where it has been processed.

In the leg expansion / contraction portion G3 of the diaper 1, a plurality of leg elastic members 72 arranged in an extended state on the peripheral edge of the leg opening LO are fixed to the elastic members arranged in a plane on the peripheral edge of the leg opening LO. It is fixed between the outer layer sheet 6 and the inner layer sheet 3i via an adhesive for use.

In the exterior body 3 of the diaper 1, the waist elastic portion G1 and the waist circumference lower elastic portion G2 are arranged in a lateral direction (Y direction) between the outer layer sheet 6 and the inner layer sheet 3i as shown in FIG. Due to the contraction of the elastic member 71, the outer layer sheet 6 between the fused joint rows L and L adjacent to each other in the lateral direction (Y direction) is deformed so as to bulge outward, and the inner layer sheet 3i is formed. It deforms so that it swells outward. Then, folds 3F composed of the outer layer sheet 6 or the inner layer sheet 3i are formed between the adjacent fusion joint rows L and L, and folds 3F and folds are formed between the outer layer sheet 6 and the inner layer sheet 3i. A hollow portion 3H surrounded by the periphery is formed on the 3rd floor.

In the diaper 1, the hydrophobic sheet 4 constituting the sweat-absorbing quick-drying sheet KS is a hydrophobic non-woven fabric composed of hydrophobic fibers, and the hydrophilic sheet 5 is a hydrophilic material composed of hydrophilic fibers. It is a non-woven fabric. As described above, in the diaper 1, the hydrophobic sheet 4 constituting the sweat-absorbing quick-drying sheet KS is composed of a hydrophobic non-woven fabric different from the outer layer sheet 6. Further, the hydrophilic sheet 5 constituting the sweat-absorbing quick-drying sheet KS is made of a hydrophilic non-woven fabric.

Examples of the hydrophobic fiber used for the hydrophobic sheet 4 constituting the sweat-absorbing quick-drying sheet KS include synthetic fibers, and specifically, those usually used as constituent fibers of various non-woven fabrics can be used, for example. , Polyethylene fibers such as polyethylene (PE) fibers and polypropylene (PP) fibers; Fibers made by using thermoplastic resins such as polyethylene terephthalate (PET) and polyamide alone; Composite fibers having a core-sheath type, side-by-side type, etc. Can be mentioned.

Examples of the hydrophilic fiber used for the hydrophilic sheet 5 constituting the sweat-absorbing quick-drying sheet KS include those obtained by hydrophilizing synthetic fibers, and specifically, those obtained by treating hydrophobic synthetic fibers with a hydrophilic agent and hydrophobic. Examples thereof include those in which a hydrophilic agent is kneaded into the synthetic fiber at the time of production. Further, it is also possible to use a composite non-woven fabric in which fibers having inherent hydrophilicity, for example, natural or semi-natural fibers are mixed with synthetic fibers. The synthetic fiber is not particularly limited, but is a polyolefin fiber such as polyethylene (PE) fiber and polypropylene (PP) fiber; a fiber made by using a thermoplastic resin such as polyethylene terephthalate (PET) and polyamide alone; a core-sheath type. , Side-by-side type and other structural composite fibers can be mentioned. The hydrophilizing agent used for hydrophilizing synthetic fibers is not particularly limited as long as it is a general hydrophilizing agent used for hygienic products. Specific examples of the hydrophilic fiber include natural cellulose fibers such as wood pulp, cotton pulp, and non-wood pulp such as walla pulp; and regenerated cellulose fibers such as rayon and cupra.

Whether the sheet is hydrophilic or hydrophobic is determined based on the contact angle of the constituent fibers measured by the [contact angle measuring method] described below. Specifically, if the contact angle is 90 degrees or more, it is judged to be hydrophobic with low hydrophilicity, and if the contact angle is smaller than 90 degrees, it is judged to be hydrophilic with high hydrophilicity.

[Measurement method of fiber contact angle]
For the measurement of the contact angle, for example, a contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used. Specifically, after dropping ion-exchanged water (about 20 picolitres) on the surface of the constituent fibers, the contact angle is immediately measured using the contact angle meter. The measurement is performed at five or more points where the constituent fibers are different, and the average value thereof is taken as the contact angle. The measurement environment temperature is 20 ° C.

The sweat-absorbing quick-drying sheet KS having the hydrophobic sheet 4 and the hydrophilic sheet 5 is a liquid of 1 μL × 49 drops evenly distributed on an acrylic plate in the same manner as sweat sweating from the skin for 60 seconds from the skin contact surface side. The amount of liquid remaining on the acrylic plate when absorbed in is 10 mg or less, and 50 μL x 1 drop of liquid placed on the hot plate that looks like the skin is absorbed from the skin contact surface within 15 minutes. It is a sheet that evaporates into. The lower limit of the remaining amount of the sweat-absorbing quick-drying sheet KS is not particularly limited, and the smaller the amount, the more preferable, and 0 mg is the most preferable. The remaining amount of the sweat-absorbing quick-drying sheet KS is preferably 5 mg or less, and more preferably 1.7 mg or less. The sweat-absorbing quick-drying sheet KS has no particular limitation on the lower limit of the evaporation time of 50 μL × 1 drop of the liquid arranged on the skin contact surface, and the shorter it is, the more preferable, but 5 minutes or more is sufficiently satisfactory. The effect should be obtained. In the sweat-absorbing quick-drying sheet KS, the evaporation time of the liquid is preferably 13 minutes or less, and more preferably 10 minutes or less. The remaining amount of the liquid and the evaporation time of the liquid are measured by the following methods.

[Measurement method of residual liquid amount]
A sweat-absorbing quick-drying sheet KS having a size of 5 cm × 5 cm is cut out from, for example, diaper 1 which is an example of an absorbent article. Here, the sweat-absorbing quick-drying sheet KS and the other non-woven fabric constituting the diaper 1 are separated from each other without breaking the sheet at the fusion-bonded joint portion 8, and the sweat-absorbing quick-drying sheet KS is used without breaking the sheet. Distinguish what can be separated as another non-woven fabric. Next, the folds and wrinkles of the cut-out sweat-absorbing quick-drying sheet KS are smoothed so that the entire skin side surface of the sweat-absorbing quick-drying sheet KS is flattened. Next, 1 μL of distilled water is dropped on an acrylic plate having a total length of 60 mm and a width of 60 mm in 7 rows and 7 columns at 7 mm intervals, and the mass (W1) is measured in a state where a total of 49 pieces are arranged. Next, the cut-out sample is gently placed on 49 water droplets arranged on an acrylic plate so that the hydrophobic layer (hydrophobic sheet 4) faces downward, and allowed to stand for 60 seconds from the start of the dropping. After 1 minute, the sample that has absorbed the distilled water is removed, and the mass (W2) of the acrylic plate at that time is measured. The measured value is an average value of n = 3. Then, the amount of liquid remaining is calculated by the following formula.

Liquid remaining amount (g) = mass of acrylic plate on which water droplets (49) are arranged (W1) -mass of acrylic plate after being absorbed by the sweat-absorbing quick-drying sheet KS (W1)

It is evaluated that the smaller the amount of liquid remaining (g), the larger the amount of liquid absorbed by the sweat-absorbing quick-drying sheet KS.

[Measurement method of liquid evaporation time]
For the measurement, a precision and rapid thermophysical property measuring device: KES-F7 (Thermorabo II) manufactured by Kato Tech Co., Ltd. is used. First, a sweat-absorbing quick-drying sheet KS having a size of 7 cm × 7 cm is cut out from, for example, diaper 1 which is an example of an absorbent article. At this time, the folds and wrinkles are smoothed so that the entire skin side surface of the sweat-absorbing quick-drying sheet KS is flattened. Next, the cut out sample is acclimated for 24 hours under the conditions of 23 ° C. and 50% RH. The acclimated sample is placed on a hot plate (sample table) heated to 33 ° C. so that the hydrophobic layer (hydrophobic sheet 4) faces downward, and a wind tunnel is placed on the upper surface of the sample at 0.2 m / sec. An air flow is applied to the sample at the wind speed, and the sample is allowed to stand until the heat supply stabilizes, and the initial value is set. Next, 50 μL of distilled water is supplied under the sample using a tube previously inserted between the hot plate and the stable sample. The change in the amount of heat supplied to the hot plate is continuously measured, the time until the amount of heat supplied decreases to the initial value is obtained, and the obtained time is defined as the evaporation time of the liquid. The air flow is continuously applied to the sample at the wind speed until the evaporation time of the liquid is determined. The measured value is an average value of n = 3.
It is evaluated that the shorter the evaporation time of the liquid, the better the evaporation property of the liquid absorbed by the sweat-absorbing quick-drying sheet KS.

The sweat-absorbing quick-drying sheet KS having the hydrophobic sheet 4 and the hydrophilic sheet 5 wets the skin contact surface when 1 μL × 49 drops of liquid are absorbed in a range of 5 cm × 5 cm of the skin contact surface for 2 minutes. the difference [Delta] q-max of the maximum heat transfer rate at the maximum heat transfer rate and the humidity state in the state (49) is preferably a 0.15 kW / m ² or less of the sheet, 0.13kW / m ² or less It is more preferable that the sheet is 0.10 kW / m ² or less, and it is particularly preferable that the sheet is 0.10 kW / m 2. The lower limit of the difference Δq-max (49) is not particularly limited, and the smaller the difference, the more preferable, but if it is 0.05 kW / m ² or more, a sufficiently satisfactory effect can be obtained. The difference Δq-max (49) is measured by the following method.

[Measuring method of difference Δq-max (49)]
For the measurement, a precision and rapid thermophysical property measuring device: KES-F7 (Thermorabo II) manufactured by Kato Tech Co., Ltd. is used. First, a sweat-absorbing quick-drying sheet KS having a size of 7 cm × 7 cm is cut out from, for example, diaper 1 which is an example of an absorbent article. At this time, the folds and wrinkles of the sweat-absorbing quick-drying sheet KS are smoothed so that the entire skin side surface of the sweat-absorbing quick-drying sheet KS is flattened. Next, the cut out sample is acclimatized for 24 hours under the conditions of 23 ° C. and 50% RH to control the humidity. Next, the humidity-controlled sample is placed on a foamed styrene sample table (total length 205 mm × width 205 mm) so that the hydrophobic layer (hydrophobic sheet 4) faces upward, and becomes the skin contact surface of the humidity-controlled sample. The maximum heat transfer rate of the hydrophobic layer (hydrophobic sheet 4) in the humidity control state: the humidity control qmax (kW / m ² ) value is measured. In this case, as the hydrophilic layer of quick drying sweat sheet KS (hydrophilic sheet) is not directly touch the sample stage made of Styrofoam, put the sample on the sample stage lined with another hydrophobic nonwoven fabric. Next, 1 μL of distilled water was dropped onto the hydrophobic layer (hydrophobic sheet 4, skin contact surface) of the sample whose humidity control qmax (kW / m ^{2) value was measured in 7 rows × 7 columns at 7 mm intervals.} A total of 49 pieces were placed and allowed to stand, and 2 minutes after the first dropping, the maximum heat transfer rate of the hydrophobic layer (hydrophobic sheet 4) in a wet state: wet qmax (49) (kW / m ² ). Measure the value. The measured value is an average value of n = 3. Then, the difference Δq−max (49) is calculated by the following equation.

Difference Δq-max (49) (kW / m ² ) = wet qmax (49) (kW / m ² ) value-humidity control qmax (kW / m ² ) value

The smaller the difference Δq-max (49) (kW / m ² ), the better the dry feeling is evaluated because the skin contact surface of the sweat-absorbing quick-drying sheet KS is not wet.

The sweat-absorbing quick-drying sheet KS having the hydrophobic sheet 4 and the hydrophilic sheet 5 absorbs 5 μL × 49 drops of liquid in a range of 7 cm × 7 cm for 2 minutes, and the maximum heat transfer in the wet state of the skin contact surface. the difference between the maximum heat transfer rate at a rate and humidity conditions Δq-max (245) is preferably in the 0.3 kW / m ² or less of the sheet to be 0.27kW / m ² or less of the sheet More preferably, the sheet is 0.25 kW / m ² or less, and particularly preferably. The lower limit of the difference Δq-max (245) is not particularly limited, and the smaller the difference, the more preferable, but if it is 0.15 or more, a sufficiently satisfactory effect can be obtained. The difference Δq-max (245) is measured by the following method.

[Measuring method of difference Δq-max (245)]
For the measurement, a precision and rapid thermophysical property measuring device: KES-F7 (Thermorabo II) manufactured by Kato Tech Co., Ltd. is used. First, a sweat-absorbing quick-drying sheet KS having a size of 7 cm × 7 cm is cut out from, for example, diaper 1 which is an example of an absorbent article. At this time, the folds and wrinkles of the sweat-absorbing quick-drying sheet KS are smoothed so that the entire skin side surface of the sweat-absorbing quick-drying sheet KS is flattened. Next, the cut out sample is acclimatized for 24 hours under the conditions of 23 ° C. and 50% RH to control the humidity. Next, the humidity-controlled sample is placed on a foamed styrene sample table (total length 205 mm × width 205 mm) so that the hydrophobic layer (hydrophobic sheet 4) faces the upper surface, and becomes the skin contact surface of the humidity-controlled sample. The maximum heat transfer rate of the hydrophobic layer (hydrophobic sheet 4) in the humidity control state: the humidity control qmax (kW / m ² ) value is measured. In this case, as the hydrophilic layer of quick drying sweat sheet KS (hydrophilic sheet) is not directly touch the sample stage made of Styrofoam, put the sample on the sample stage lined with another hydrophobic nonwoven fabric. Next, 5 μL of distilled water was dropped into the hydrophobic layer (hydrophobic sheet 4, skin contact surface) of the sample whose humidity control qmax (kW / m ^{2) value was measured in 7 rows × 7 columns at 7 mm intervals.} A total of 49 pieces were placed and allowed to stand, and 2 minutes after the first dropping, the maximum heat transfer rate of the hydrophobic layer (hydrophobic sheet 4) in a wet state: wet qmax (245) (kW / m ² ). Measure the value. The measured value is an average value of n = 3. Then, the difference Δq−max (245) is calculated by the following equation.

Difference Δq-max (245) (kW / m ² ) = wet qmax (245) (kW / m ² ) value-humidity control qmax (kW / m ² ) value

Similar to the difference Δq-max (49) (kW / m ² ), the smaller the difference Δq-max (245) (kW / m ² ), the wetter the skin contact surface of the sweat-absorbing quick-drying sheet KS. It is evaluated that the dry feeling is good.

The material for forming each part of the diaper 1 described above will be described.
As the front surface sheet 21, back surface sheet 22, absorber 23, leak-proof cuff 24, etc. constituting the absorbent main body 2, various items conventionally used for absorbent articles such as disposable diapers shall be used without particular limitation. Can be done. For example, as the surface sheet 21, a non-woven fabric having a single-layer or multi-layer structure, a perforated film, or the like can be used. As the back sheet 22, a breathable resin film or the like can be used. As the absorber 23, one in which an absorbent core composed of absorbent polymer particles and a fiber material is coated with tissue paper can be used. Further, as the leak-proof cuff 24, a water-repellent single-layer or multi-layered non-woven fabric or the like can be used.

Examples of the elastic member (elastic member 25 for forming a leak-proof cuff, elastic member 71, leg elastic member 72, etc.) include synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, and elastic polyolefin. Polyurethane and the like can be mentioned. As the form of the elastic member, a thread-like (thread rubber or the like) or a string-like (flat rubber or the like) having a rectangular, square, circular, elliptical, or polygonal cross section can be preferably used.

Adhesive 9, elastic member fixing adhesive for fixing elastic members (leakage-proof cuff forming elastic member 25, elastic member 71, leg elastic member 72, etc.), and main body for fixing exterior body 3 and absorbent body 2, etc. As the fixing adhesive, various hot melt adhesives and the like conventionally used for absorbent articles such as disposable diapers can be used without particular limitation.

The action and effect when the diaper 1 according to the embodiment of the present invention described above is used will be described.
As shown in FIGS. 2 and 3, the diaper 1 is provided with a sweat-absorbing quick-drying sheet KS on the skin contact surface side of the dorsal waist flap FB, which is an elastic region. The sweat-absorbing and quick-drying sheet KS includes a hydrophobic layer 4 forming a skin contact surface and a hydrophilic layer 5 arranged adjacent to the non-skin contact surface of the hydrophobic layer 4 to form a skin contact surface. The amount of the liquid remaining when the liquid is absorbed from the hydrophobic layer (hydrophobic sheet 4) is 10 mg or less, and the evaporation time of the liquid absorbed from the hydrophobic layer (hydrophobic sheet 4) which is the skin contact surface is It is a sheet within 15 minutes. The diaper 1 provided with such a sweat-absorbing quick-drying sheet KS can achieve both sweat absorption and quick-drying of sweat, can absorb small sweat droplets at the beginning of scratching, and gives a dry feeling to the skin. Can be expected to improve and reduce skin problems such as eczema, sweat rash, and rash. Further, in the diaper 1, as shown in FIG. 2, the sweat-absorbing and quick-drying sheet KS is arranged on each of the skin contact surface side of the dorsal waist flap FB and the ventral waist flap FA, so that the above effect is further exhibited. be able to.

Further, since the sweat-absorbing quick-drying sheet KS provided in the diaper 1 is a sheet having a difference Δq-max (49) of 0.15 kW / m ² or less, it can absorb even small sweat droplets at the beginning of sweating. It can be expected to further reduce skin problems such as eczema, heat rash, and rash.

Further, since the sweat-absorbing quick-drying sheet KS provided in the diaper 1 is a sheet having a difference Δq-max (245) of 0.3 kW / m ² or less, it is possible to absorb even large sweat droplets, and eczema. Further reduction of skin troubles such as heat rash and rash can be expected.

Further, in the diaper 1, as shown in FIG. 2, a plurality of elastic members 71 are each provided in a region extending from the waist expansion / contraction portion G1 to the waist circumference lower expansion / contraction portion G2 in each of the ventral region A and the dorsal region B. It is arranged in a lateral direction (Y direction) in an extended state through a gap between the fusion splicing portions 8 of each of the fusion splicing portion rows 8L. Then, as shown in FIG. 5 , as the elastic member 71 arranged in the extended state contracts, the fold 3F composed of the outer layer sheet 6 or the inner layer sheet 3i is formed between the adjacent fusion joint rows L and L. Along with this, a hollow portion 3H surrounded by folds 3F and folds 3F is formed between the outer layer sheet 6 and the inner layer sheet 3i. Therefore, the sweat absorbed in the sweat-absorbing quick-drying sheet is more easily evaporated by the hollow portion 3H, so that skin troubles such as eczema, heat rash, and rash can be further reduced.

Further, from the viewpoint of further exerting the above-mentioned effect, the fusion joint portion 8 has a radius as shown in FIG. 6 in a plan view of the sweat-absorbing quick-drying sheet KS in a state where the diaper 1 is expanded and extended. It is preferable that they are dispersed and arranged throughout the hydrophobic layer (hydrophobic sheet 4) so that at least a part or all of the fusion joint 8 is included in the virtual circle IR of 3 mm, and the virtual circle having a radius of 2 mm. It is more preferable that they are dispersed and arranged over the entire hydrophobic layer (hydrophobic sheet 4) so that a part or all of at least one fusion joint 8 is included in the circular IR, and a virtual radius of 1.5 mm is provided. It is even more preferable that the circular IR is dispersed and arranged over the entire hydrophobic layer (hydrophobic sheet 4) so that a part or all of the fusion junction 8 is included in the circular IR. Here, the fact that a part or all of at least one fusion joint 8 is included in the virtual circle IR means that when 10 of the virtual circle IRs are provided on the sweat-absorbing quick-drying sheet KS, 10 of them are included. The fusion junction 8 may not be included at all in the one or two virtual circle IRs of the above, and a part of at least one fusion junction 8 in the remaining eight virtual circle IRs. Or it means that all of them should be included. The virtual circle IR assumes sweat secretion points (sweat glands) scattered on the skin surface of the human body, and the sweat-absorbing quick-drying sheet KS can absorb sweat more efficiently by having the above-mentioned configuration. In particular, when the radius of the virtual circle IR is 2 mm, it is more effective if the fusion joint 8 is arranged so as to satisfy the above, and even when the radius is 1.5 mm, the fusion joint 8 is more effective. It is even more effective if 8 is arranged so as to satisfy the above.

Further, from the viewpoint of further exerting the above-mentioned effect, in the hydrophilic layer (hydrophilic sheet 5) constituting the sweat-absorbing quick-drying sheet KS, the orientation direction of the constituent fibers constituting the hydrophilic layer coincides with the expansion / contraction direction of the expansion / contraction region. Is preferable. Here, the fact that the orientation direction of the constituent fibers and the expansion / contraction direction of the expansion / contraction region match is not only a state in which the orientation direction and the expansion / contraction direction completely coincide with, for example, the lateral direction (Y direction), but also the orientation. It means that the directions and the expansion / contraction directions are generally aligned in the lateral direction (Y direction), for example. Since the diaper 1 contracts due to the elastic member 71 arranged in the lateral direction (Y direction) in an elongated state, the expansion and contraction direction of the diaper 1 is the lateral direction (Y direction), and the orientation of the constituent fibers constituting the hydrophilic layer The direction is preferably the lateral direction (Y direction). If the orientation direction of the constituent fibers constituting the hydrophilic layer (hydrophilic sheet 5) is the lateral direction (Y direction), the elastic members 71 arranged in the elongated state contract to form the folds 3F and the hollow portion 3H. As a result, the sweat absorbed in the lateral direction (Y direction) of the folds 3F extending in the vertical direction (X direction) is easily dispersed and easily evaporated.

<Method of confirming the orientation direction of constituent fibers>
From the absorbent article, the target fiber sheet (sweat-absorbent quick-drying sheet, etc.) is left to stand for 12 hours in an environment of room temperature 23 ° C. ± 2 ° C. and relative humidity 50% RH ± 2% to adjust the humidity to a constant state. The sheet after humidity control is cut into a shape having dimensions of 150 mm in the horizontal direction (Y direction) and 25 mm in the vertical direction (X direction) of the absorbent article, and used as a measurement sample. This sample is attached to the chuck of a tensile tester (Autograph AG-X1kN manufactured by Shimadzu Corporation) without tension so that the width direction (Y direction) is the tensile direction. The distance between the chucks is 100 mm. The sample is pulled at a tensile speed of 300 mm / min and the maximum strength until the sample breaks is measured. The measurement is performed 5 times, and the average value of these is taken as the tensile strength in the width direction (X direction). Further, the tensile strength in the vertical direction (X direction) is obtained by cutting out a rectangular shape having dimensions of 150 mm in the vertical direction (X direction) and 25 mm in the width direction (Y direction) from the sheet after humidity control, and using this as a sample. This sample is attached to the chuck of the tensile tester without tension so that the vertical direction (X direction) is the tensile direction, and the tensile strength in the vertical direction (X direction) is obtained by the same procedure as described above. The direction in which the obtained tensile strength is large (horizontal direction or vertical direction) is defined as the orientation direction of the constituent fibers constituting the fiber sheet.

Further, from the viewpoint of further exerting the above-mentioned effect, regarding the sweat-absorbing quick-drying sheet KS in the case where a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are overlapped as in diaper 1, the hydrophobic layer The constituent fibers constituting the hydrophobic sheet 4 and the constituent fibers constituting the hydrophilic sheet 5 which is a hydrophilic layer are different in hydrophilicity, fineness, fiber density, and at least hydrophilicity among the constituent resins. Is preferable. In particular, regarding the difference in hydrophilicity, specifically, the difference in the contact angle of the constituent fibers measured by the above-mentioned [method for measuring the contact angle] is preferably a difference of 10 degrees or more, and a difference of 20 degrees or more. It is more preferable to have.

Further, from the viewpoint of further exerting the above-mentioned effect and absorbing even small sweat droplets at the beginning of sweating, a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are laminated like diaper 1. If so, the ratio of the area of the entire fusion joint 8 to the total area of the sweat-absorbing quick-drying sheet KS is preferably 12% or less, more preferably 10% or less, and 3% or more. It is preferably 5% or more, more preferably 3% or more and 12% or less, and further preferably 5% or more and 10% or less.
Then, from the viewpoint of further exerting the above-mentioned effect and absorbing even small sweat droplets at the beginning of sweating, a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are laminated like diaper 1. fusion joint 8 when being in the area of one of which, is preferably 2 mm ² or less, further preferably 1.8 mm ² or less, and preferably at 0.3 mm ² or more , further preferably 0.5 mm ² or more, specifically, is preferably 0.3 mm ² or more 2 mm ² or less, and more preferably 0.5 mm ² or more 1.8 mm ² or less.

Further, from the viewpoint of further exerting the above-mentioned effect and easily diffusing the absorbed sweat, the sweat absorption when a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are overlapped like the diaper 1. The quick-drying sheet KS has a total basis weight of 40 g / m ² or less, more preferably 35 g / m ² or less, and preferably 15 g / m ² or more, preferably 20 g. It is more preferably / m ² or more, specifically, 15 g / m ² or more and 40 g / m ² or less, and even more preferably 20 g / m ² or more and 35 g / m ² or less.
Further, in the case where a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are overlapped like the diaper 1, the sweat-absorbing quick-drying sheet KS has a basis weight of the hydrophilic sheet 5. It is preferably 9 g / m ² or more, preferably 13 g / m ² or more, and preferably 20 g / m ² or less, preferably 18 g / m ² or less, specifically. , 9 g / m ² or more and 20 g / m ² or less, and 13 g / m ² or more and 18 g / m ² or less is preferable.

Further, from the viewpoint of further exerting the above-mentioned effect and easily diffusing the absorbed sweat, the sweat absorption when a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are overlapped like the diaper 1. In the quick-drying sheet KS, the interfiber distance of the constituent fibers constituting the hydrophilic sheet 5 is preferably shorter than the interfiber distance constituting the hydrophobic sheet 4, preferably 45 μm or less, and 35 μm or less. It is more preferably 5 μm or more, more preferably 10 μm or more, and specifically, 5 μm or more and 45 μm or less, and even more preferably 10 μm or more and 35 μm or less.
The interfiber distance is measured by the following method.

[Measuring method of interfiber distance]
It can be calculated by the following formula (1).

Further, from the viewpoint of further exerting the above-mentioned effect and easily diffusing the absorbed sweat, sweat absorption when a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are overlapped as in diaper 1. In the quick-drying sheet KS, the hydrophilic sheet 5 which is a hydrophilic layer is preferably a spunbonded non-woven fabric or a melt-blown non-woven fabric, and more preferably a spunbonded non-woven fabric.

Further, from the viewpoint of further exerting the above-mentioned effect and achieving both sweat absorption and a dry feeling, a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) are overlapped like the diaper 1. In the case of the sweat-absorbing quick-drying sheet KS, the basis weight of the hydrophobic sheet 4 ^{is preferably 9 g / m 2} or more, preferably 10 g / m ² or more, and 20 g / m ² or less. Is preferably 18 g / m ² or less, specifically, 9 g / m ² or more and 20 g / m ² or less is preferable, and 10 g / m ² or more and 18 g / m ² or less is preferable. ..

As shown in FIG. 3, the sweat-absorbing quick-drying sheet KS is formed by overlapping the hydrophobic sheet 4 and the hydrophilic sheet 5, and is recessed from the hydrophobic sheet 4 side toward the hydrophilic sheet 5 side in the thickness direction. A recessed portion KB is provided, and a fusion joint portion 8 is provided in the recessed portion KB. The thickness of the recessed portion KB becomes smaller as it approaches the fusion joint portion 8. Here, the fact that the thickness of the recessed portion KB becomes smaller as it approaches the fusion splicing portion 8 means that the outer peripheral portion of the recessed portion KB not only becomes continuously smaller as it approaches the fusion splicing portion 8. It also means that the thickness gradually decreases as it approaches the fusion splicing portion 8. It is preferable that the outer peripheral portion of the recessed portion KB gradually becomes thinner toward the fusion joint portion 8. Here, the outer peripheral portion means a portion of the recessed portion KB outside the outer peripheral wall of the fusion joint portion 8 which is the peripheral edge (contour) of the fusion joint portion 8. The outer peripheral portion is formed in an annular shape with the outer peripheral wall of the fusion splicing portion 8 in each recessed portion KB as a base end.

Further, regarding the sweat-absorbing quick-drying sheet KS, the fusion joint portion 8 in the recessed portion KB has a thickness d8 (see FIG. 3) of the sweat-absorbing quick-drying portion 8 from the viewpoint of transferring the wearer's sweat to the hydrophilic sheet 5 side. The thickness dK (see FIG. 3) of the portion of the sheet KS excluding the recessed portion KB is preferably 1/3 or less, more preferably 1/4 or less, and further preferably 1/5 or less. Preferably, the lower limit is 1/30.
Specifically, the thickness d8 (see FIG. 3) of the fusion spliced portion 8 is preferably 60 μm or less, more preferably 45 μm or less, and the lower limit is 10 μm from the same viewpoint.
The thickness d8 of the fusion splicing portion 8 is measured by cutting in the thickness direction so that the cut surface of the fusion splicing portion 8 is not crushed by using a knife, a cutter, a razor or the like so as to include the fusion splicing portion 8. , Observe the cut cross section with a microscope (for example, KEYENCE digital microscope VHX-1000) and measure the thickness of the thickest part. The thickness is measured at 10 different fusion joints 8 and the average value thereof is calculated to obtain the thickness of the fusion joint 8.
Further, from the same viewpoint, the thickness dK (see FIG. 3) of the portion of the sweat-absorbing quick-drying sheet KS excluding the recessed portion KB is preferably 600 μm or less, more preferably 350 μm or less, and the lower limit is 100 μm. Is.
The thickness dK of the portion excluding the recessed portion KB constituting the sweat-absorbing quick-drying sheet KS is measured using a thickness measuring device with a load of 0.05 kPa applied to the sweat-absorbing quick-drying sheet KS. A laser displacement meter manufactured by KEYENCE (LK-080 manufactured by KEYENCE) is used as the thickness measuring instrument. The thickness is measured at 10 points, and the average value thereof is calculated to obtain the thickness of the portion excluding the recessed portion KB.

Further, from the viewpoint of further improving the dry feeling of the skin, it is preferable that the sweat-absorbing quick-drying sheet KS has a plurality of through holes penetrating the sweat-absorbing quick-drying sheet KS. The through hole penetrating the sweat-absorbing quick-drying sheet KS may be formed in the central portion of the fusion splicing portion 8 or may be formed in a portion other than the fusion splicing portion 8. When the through hole is formed in the central portion of the fusion joint portion 8, if the fusion joint portion 8 employs an ultrasonic seal, a laser, or the like, the output is higher than that in the case of simply forming the fusion joint portion 8. It can be formed by increasing the amount or lengthening the melting time. When the through hole is formed in a portion other than the fusion joint portion 8, it can be formed by using a pin embossing device or the like. The area of the through hole is ^{preferably 0.5 mm 2} or more and 5 mm ² or less, and ^{more preferably 0.75 mm 2} or more and 4 mm ² or less.

Further, from the viewpoint of further exerting the above-mentioned effect and making it easier for the absorbed sweat to evaporate, the stretchable region is located on the non-skin contact surface side of the sweat-absorbing quick-drying sheet KS and is an outer layer different from the sweat-absorbing quick-drying sheet KS. It has a sheet 6, and as shown in FIG. 6, the outer layer sheet 6 preferably has a plurality of holes 61 penetrating the outer layer sheet 6. Aperture 61, the area is preferably greater than the area of the melt bonded portion 8, is preferably 1 mm ² or more 5 mm ² or less, and more preferably 1.5 mm ² or more 4 mm ² or less .. As shown in FIG. 6, the opening portion 61 is arranged so that at least a part of the diaper 1 does not overlap with the fusion joint portion 8 of the sweat-absorbing quick-drying sheet KS in the expanded and extended state. Is preferable. If the perforated portion 61 is arranged so as not to overlap the fusion-bonded joint 8 of the sweat-absorbing quick-drying sheet KS, the sweat absorbed by the sweat-absorbing quick-drying sheet KS is retained by the hydrophilic layer other than the fusion-bonded joint 8. This is because it is diffused and easily evaporates through the opening portion 61 penetrating the outer layer sheet 6.

Further, from the viewpoint of further exerting the above-mentioned effect and further facilitating the evaporation of the absorbed sweat, the outer layer sheet 6 or the inner layer sheet 3i in the waist expansion / contraction portion G1 and the waist circumference lower expansion / contraction portion G2 in the expansion / contraction region, as shown in FIG. A diaper 3F composed of the folds 3F is formed, and a hollow portion 3H surrounded by the folds 3F and the folds 3F is formed between the outer layer sheet 6 and the inner layer sheet 3i, and the outer layer sheet 6 is on the non-skin side. It has a gathered portion G in which a convex portion swelling toward the skin and a concave portion denting toward the skin side are alternately formed in the width direction (Y direction) of the diaper 1. A cross-sectional view of the gathered portion G in a state where the stretchable region formed in this way is stretched by 70% is viewed from a half position of the depth d1 of the recess recessed on the skin side of the outer layer sheet 6 as shown in FIG. It is preferable that the opening portion 61 is arranged on the convex portion side that bulges to the non-skin side, and it is preferable that 60% or more of the entire opening portion 61 is arranged, and 75% or more is arranged. The upper limit is preferably 100%.

Further, from the viewpoint of further exerting the above-mentioned effect and making it easier for the absorbed sweat to evaporate, the gathered portion G formed by contracting the elastic member 71 is viewed in cross section as shown in FIG. 4, and is a hydrophobic sheet. 60% of the entire fusion joint portion 8 of the sweat-absorbing quick-drying sheet KS to the convex portion side (skin contact surface side) that swells toward the skin side from the half position of the depth d2 of the concave portion recessed on the non-skin side of 4. The above is preferably arranged, 75% or more is preferably arranged, and the upper limit is preferably 100%.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above-described embodiment and can be appropriately modified.
For example, in the above-mentioned diaper 1, the hydrophobic sheet 4 constituting the sweat-absorbing quick-drying sheet KS is adhered to the skin contact surface side of the folded-back portion 6R of the outer layer sheet 6 via an adhesive as shown in FIG. However, the folded-back portion 6R of the outer layer sheet 6 may be configured as a hydrophobic sheet, and the sweat-absorbing quick-drying sheet KS of the diaper 1 comprises two sheets, a hydrophobic sheet 4 and a hydrophilic sheet 5. However, another sheet is provided on the non-skin facing surface side of the hydrophilic sheet 5, and three or more sheets of this sheet and the hydrophobic sheet 4 and the hydrophilic sheet 5 are fused and joined. It may be formed by fusion-bonding at 8. Further, the sweat-absorbing quick-drying sheet KS of the diaper 1 is composed of a plurality of sheets (hydrophobic sheet 4 and hydrophilic sheet 5) overlapped with each other, but at least one sheet in which the hydrophobic layer 4 and the hydrophilic layer 5 are overlapped. It may be formed of a sheet of. When the sweat-absorbing quick-drying sheet KS is composed of one non-woven fabric having a multi-layer structure, it may be a two-layer non-woven fabric having two layers of a hydrophobic layer 4 and a hydrophilic layer 5, and the non-woven fabric of the hydrophilic layer 5 may be used. Another layer may be provided on the facing surface side.

Further, in the diaper 1, the folded portion 6R of the outer layer sheet 6 and the outer layer sheet 6 and the hydrophobic sheet 4 of the sweat-absorbing quick-drying sheet KS were different sheets, but as shown in FIG. 7, they were different sheets. The exterior body 3 has an outer layer sheet 6 and a hydrophilic sheet 5 that is separate from the outer layer sheet 6, and the outer layer sheet 6 is a folded portion that is folded back so as to cover the skin contact surface side of the hydrophilic sheet 5. The sweat-absorbing and quick-drying sheet KS having 6R may be formed by overlapping the folded-back portion 6R of the outer layer sheet 6 and the hydrophilic sheet 5. More specifically, the outer layer sheet 6 is folded back toward the skin contact surface side of the hydrophilic sheet 5 along the peripheral edge of the waist opening WO, and the folded portion 6R is the most skin contact surface side of the diaper 1. The hydrophobic sheet 4 is located in, and may be fixed by a rectangular hydrophilic sheet 5 long in the lateral direction (Y direction) and a fusion splicing portion 8 to form a sweat-absorbing quick-drying sheet KS. In this case, the hydrophilic sheet 5 may be a hydrophilic sheet different from the hydrophilic inner layer sheet 3i, or may be a hydrophilic inner layer sheet 3i.

In the diaper 1, as shown in FIGS. 3 and 4, the sweat-absorbing quick-drying sheet KS is a fusion-bonded portion of a hydrophobic non-woven fabric composed of hydrophobic fibers and a hydrophilic non-woven fabric composed of hydrophilic fibers. Although it was joined in No. 8, a non-woven fabric produced by laminating hydrophobic fibers and hydrophilic fibers in layers and then melting and fixing them by heat can also be used as a sweat-absorbing quick-drying sheet KS. The sweat-absorbing and quick-drying sheet KS constructed as described above is configured as a single non-woven fabric, and has a hydrophobic layer made of hydrophobic fibers on its skin contact surface and hydrophilicity on its non-skin contact surface. There is a hydrophilic layer made of sex fibers, and it has a fusion splicing portion 8 for fixing the constituent fibers of the hydrophobic layer and the constituent fibers of the hydrophilic layer. When the sweat-absorbing quick-drying sheet KS is composed of one non-woven fabric, the fusion-bonding portion 8 is a fusion-bonding portion in which the hydrophobic sheet 4 and the hydrophilic sheet 5 in the diaper 1 are joined to form a sweat-absorbing quick-drying sheet KS. The part 8 is the same in that the hydrophobic layer made of hydrophobic fibers and the hydrophilic layer made of hydrophilic fibers are fixed by a plurality of fusion-bonded parts, but the difference is that they are formed at the time of manufacturing the non-woven fabric. The fusion splicing portion 8 is formed to fix the constituent fibers of the hydrophobic layer and the constituent fibers of the hydrophilic layer so that the sweat-absorbing quick-drying sheet KS maintains the form as one non-woven fabric. Basically, the fusion spliced portions 8 may be uniformly dispersed or unevenly dispersed as long as the form of the non-woven fabric can be maintained.

The method for producing the sweat-absorbing quick-drying sheet KS composed of one non-woven fabric is not particularly limited as long as the non-woven fabric can be molded, but the spunbond method is preferable in terms of excellent productivity.
The production of the spunbonded non-woven fabric is as follows, for example. The polymer forming the hydrophobic fiber and the polymer forming the hydrophilic fiber are separately melted by an extruder or the like, and each melt is sequentially discharged from a spinning spout having a spinning nozzle to form the hydrophobic fiber. The long fibers of No. 1 and the long fibers of hydrophilic fibers are spun and laminated. The spun composite long fibers are cooled by a cooling fluid, and tension is further applied by a drawing air to obtain a predetermined fineness, and the fibers are collected as they are on a collection belt and deposited to a predetermined thickness. Next, by heat-embossing the deposit, a fusion-bonded joint portion 8 is formed between the constituent fibers of the hydrophobic layer and the constituent fibers of the hydrophilic layer, and a sweat-absorbing quick-drying sheet KS of a spunbonded non-woven fabric can be obtained.
Further, as a non-woven fabric, a card web containing hydrophobic heat-sealing fibers as a main component and a card web containing hydrophilic fibers as a main component are superposed, and then hot air treatment is applied to form the whole by bonding them together. It is also possible to manufacture a sweat-absorbing quick-drying sheet KS composed of one non-woven fabric by heat-bonding the non-woven fabric by heat embossing.
As the thermal embossing device, one having an embossing roll and an anvil roll and having a convex portion having a shape corresponding to the fusion splicing portion 8 on the outer peripheral surface of the embossing roll can be used. As a process for forming the fusion spliced portion 8, an ultrasonic seal, a laser, or the like can be adopted instead of the thermal embossing process.

When the sweat-absorbing quick-drying sheet KS is composed of one non-woven fabric having a multi-layer structure, the constituent fibers constituting the hydrophobic layer 4 and the constituent fibers constituting the hydrophilic layer 5 have hydrophilicity, fineness, fiber density, and composition. Of the resins, it is preferable that at least the hydrophilicity is different. In particular, regarding the difference in hydrophilicity, specifically, the difference in the contact angle of the constituent fibers measured by the above-mentioned [method for measuring the contact angle] is preferably a difference of 10 degrees or more, and a difference of 20 degrees or more. It is more preferable to have.

When the sweat-absorbing quick-drying sheet KS is composed of a single non-woven fabric having a multi-layer structure, the entire area of the sweat-absorbing quick-drying sheet KS is fused and joined 8 from the viewpoint of absorbing even small sweat droplets at the beginning of sweating. The ratio of the area of is preferably 15% or less, more preferably 13% or less, and more preferably 6% or more, further preferably 8% or more, specifically. , 6% or more and 15% or less, and more preferably 8% or more and 13% or less.
From the same viewpoint, the area of one of the fusion spliced portions 8 in the case of being composed of one piece of non-woven fabric having a multilayer structure ^{is preferably 0.25 mm 2} or less, and 0.2 mm ² or less. It is more preferably 0.05 mm ² or more, more preferably 0.1 mm ² or more, and specifically, 0.05 mm ² or more and 0.25 mm ² or less. Is preferable, and ^{more preferably 0.1 mm 2} or more and 0.2 mm ² or less.

When the sweat-absorbing quick-drying sheet KS is composed of a single layered non-woven fabric, the sweat-absorbing quick-drying sheet KS has a high overall basis weight from the viewpoint of high absorption of sweat absorbed and easy diffusion of sweat. It is more preferably 30 g / m ² or less, further preferably 25 g / m ² or less, and further preferably 15 g / m ² or more, further preferably 18 g / m ² or more, specifically. Specifically, it is preferably 15 g / m ² or more and 30 g / m ^{2 or less, and more preferably 18 g / m 2} or more and 25 g / m ² or less.
Further, from the same viewpoint, when the sweat-absorbing quick-drying sheet KS is composed of one non-woven fabric having a multi-layer structure, the sweat-absorbing quick-drying sheet KS has a hydrophilic layer 5 having a basis weight of 5 g / m ² or more. It is preferably 9 g / m ² or more, preferably 15 g / m ² or less, preferably 13 g / m ² or less, and specifically 5 g / m ² or more. It is preferably 15 g / m ² or less, and preferably 9 g / m ² or more and 13 g / m ² or less.

When the sweat-absorbing quick-drying sheet KS is composed of a single non-woven fabric having a multi-layer structure, the interfiber distance of the constituent fibers constituting the hydrophilic layer 5 is large from the viewpoint of high absorption of absorbed sweat and easy diffusion of sweat. , It is preferably shorter than the interfiber distance constituting the hydrophobic layer 4, preferably 45 μm or less, further preferably 35 μm or less, and preferably 5 μm or more, and preferably 10 μm or more. More preferably, it is more preferably 5 μm or more and 45 μm or less, and even more preferably 10 μm or more and 35 μm or less. The interfiber distance is measured by the above method.

When the sweat-absorbing quick-drying sheet KS is composed of a single non-woven fabric having a multi-layer structure, the hydrophilic layer 5 of the sweat-absorbing quick-drying sheet KS has a span from the viewpoint of high absorption of sweat absorbed and easy diffusion of sweat. It is preferably a bond layer or a melt-blown layer, and more preferably a melt-blown layer.

When the sweat-absorbing quick-drying sheet KS is composed of a single non-woven fabric having a multi-layer structure, the sweat-absorbing quick-drying sheet KS has a hydrophobic layer 4 having a basis weight of 5 g / m ² or more from the viewpoint of improving a dry feeling. is preferably, is preferably 9 g / m ² or more, and is preferably at 15 g / m ² or less, preferably 13 g / m ² or less, specifically, 5 g / m ² It is preferably 15 g / m ² or more, and preferably 9 g / m ² or more and 13 g / m ² or less.

Further, in the exterior body 3 of the diaper 1, as shown in FIG. 3, the hydrophobic sheet 4 and the hydrophilic sheet 5 are joined and fixed by a plurality of heat-sealed fusion-bonded portions 8, but further, the hydrophobic sheet 4 is further bonded and fixed. The sex sheet 4 and the hydrophilic sheet 5 may be fixed via an adhesive.
Further, in the exterior body 3 of the diaper 1, as shown in FIG. 2, the elastic member 71 is arranged between the outer layer sheet 6 and the inner layer sheet 3i, but the elastic member 71 may not be arranged. When the elastic region is formed in a form in which the elastic member 71 is not arranged, an elastic non-woven fabric having elasticity in the lateral direction (Y direction) may be used for the exterior.

Further, in the disposable diaper 1 described above, as shown in FIG. 2, the exterior body 3 is a pants-type disposable diaper having a continuous shape such as an hourglass covering the ventral region A, the inseam region C, and the dorsal region B. The exterior body 3 may be a split-type pants-type disposable diaper that is divided into a ventral exterior body, a dorsal exterior body, and an inseam exterior body as separate members.
Further, in the disposable diaper 1 described above, the sweat-absorbing quick-drying sheet KS was arranged on the skin contact surface side of the waist elastic portion G1 and the waist circumference lower elastic portion G2, but the sweat-absorbing quick-drying sheet was arranged on the leg elastic portion G3. It may have been done. In this case, it is preferable that the orientation direction of the constituent fibers constituting the hydrophilic layer of the sweat-absorbing quick-drying sheet KS coincides with the expansion / contraction direction of the leg expansion / contraction region. In the leg elastic portion G3 of the diaper 1, a plurality of leg elastic members 72 arranged in an extended state on the peripheral edge of the leg opening LO contract along the peripheral edge of the leg opening LO, so that the leg elastic member 72 It is sufficient that the orientation direction of the constituent fibers constituting the hydrophilic layer is substantially parallel to the orientation direction (the expansion / contraction direction of the leg expansion / contraction region). Here, substantially parallel means that the angle formed by the orientation direction of the leg elastic member 72 and the orientation direction of the constituent fibers constituting the hydrophilic layer is 0 ° to 20 °.

Further, the disposable diaper 1 described above is a pants-type disposable diaper having an exterior body 3 as shown in FIG. 1, but may be a deployable disposable diaper. In the case of a deployable disposable diaper having a liquid-permeable front sheet, a liquid-impermeable back sheet, and an absorber between the sheets, the absorbent is located outward from the front-rear end of the absorber in the vertical direction X. Then, the sweat-absorbing and quick-drying sheet KS may be arranged at least on the skin side of the dorsal waist flap FB among the ventral waist flap FA and the dorsal waist flap FB extending in the lateral direction Y. Further, a hydrophobic sheet 4 may be arranged on the skin contact surface side of the hydrophilic surface sheet, and the surface sheet and the hydrophobic sheet 4 may be joined and fixed at the fusional joint 8 to form a sweat-absorbing and quick-drying sheet. .. In this case, the surface sheet corresponds to the hydrophilic sheet 5.

The absorbent article of the present invention may be a sanitary napkin as long as it has a stretchable region in addition to the disposable diaper such as the disposable diaper 1 described above.

The following absorbent articles are further disclosed with respect to the above-described embodiments.

<1>
An absorbent article with a stretchable area
The stretchable region has a sweat-absorbing quick-drying sheet composed of at least two layers on the skin contact surface side thereof.
The sweat-absorbing and quick-drying sheet is composed of a hydrophobic hydrophobic layer composed of hydrophobic fibers forming a skin contact surface and hydrophilic fibers arranged adjacent to the non-skin contact surface of the hydrophobic layer. It includes a formed hydrophilic hydrophilic layer, and has a hydrophobic layer and a plurality of fusion-bonded portions for fixing the hydrophilic layer.
The sweat-absorbing quick-drying sheet is a sheet in which the amount of liquid remaining when 1 μL × 49 drops of liquid arranged in a range of 5 cm × 5 cm on the skin contact surface is absorbed in 60 seconds is 10 mg or less, and the above-mentioned An absorbent article, which is a sheet in which 50 μL × 1 drop of liquid placed on the skin contact surface evaporates within 15 minutes.

<2>
The sweat-absorbing and quick-drying sheet has a maximum heat transfer rate and a humidity control state in a wet state of the skin contact surface when 1 μL × 49 drops of liquid are absorbed in a range of 5 cm × 5 cm of the skin contact surface for 2 minutes. The absorbent article according to <1>, wherein the difference Δq-max (49) from the maximum heat transfer rate ^{in the above sheet is 0.15 kW / m 2 or less.}
<3>
The sweat-absorbing and quick-drying sheet has a maximum heat transfer rate and a humidity control state in a wet state of the skin contact surface when 5 μL × 49 drops of liquid are absorbed in a range of 7 cm × 7 cm of the skin contact surface for 2 minutes. The absorbent article according to <1> or <2>, wherein the difference Δq-max (245) from the maximum heat transfer rate ^{in the above sheet is 0.3 kW / m 2 or less.}
<4>
The fusion-bonded joints are dispersed and arranged over the entire hydrophobic layer so that at least a part of the fusion-bonded joints is included in a virtual circle having a radius of 3 mm in a plan view of the sweat-absorbing quick-drying sheet. The absorbent article according to any one of <1> to <3>.
<5>
The hydrophilic layer of the sweat-absorbing quick-drying sheet according to any one of <1> to <4>, wherein the orientation direction of the constituent fibers constituting the hydrophilic layer coincides with the expansion / contraction direction of the expansion / contraction region. Absorbent article.
<6>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The ratio of the total area of the fusion spliced portion to the total area of the sweat-absorbing quick-drying sheet is 12% or less.
The absorbent article according to any one of <1> to <5>, wherein the fusional joint has an area of 2 mm ^{2 or less.}
<7>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The sweat-absorbing and quick-drying sheet has a basis weight of 40 g / m ² or less.
The hydrophilic sheet, which is the hydrophilic layer, has a basis weight of 9 g / m ² or more and 20 g / m ² or less, and the interfiber distance of the constituent fibers constituting the hydrophilic sheet is 45 μm or less. The absorbent article according to any one of ~ <6>.
<8>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The absorbent article according to any one of <1> to <7>, wherein the hydrophobic sheet, which is the hydrophobic layer, has a basis weight of 9 g / m ² or more and 20 g / m ^{2 or less.}
<9>
The sweat-absorbing and quick-drying sheet is formed of a single non-woven fabric.
The ratio of the total area of the fusion spliced portion to the total area of the sweat-absorbing quick-drying sheet is 15% or less.
The absorbent article according to any one of <1> to <6>, wherein the fusional joint has an area of 0.25 mm ^{2 or less.}

<10>
The absorbent article according to any one of <1> to <9>, wherein the sweat-absorbing quick-drying sheet has a plurality of through holes penetrating the sweat-absorbing quick-drying sheet.

<11>
Absorbent articles have an exterior and
The exterior body has an outer layer sheet and a hydrophilic separate sheet separate from the outer layer sheet.
The outer layer sheet has a plurality of openings that penetrate the outer layer sheet.
The outer layer sheet includes a folded portion that is folded back so as to cover the skin contact surface side of the separate sheet.
The absorbent article according to any one of <1> to <10 >, wherein the sweat-absorbing quick-drying sheet is formed by overlapping the folded portion of the outer layer sheet and the separate sheet.
<12>
The absorbent article according to <11>, wherein at least a part of the perforated portion of the outer layer sheet is arranged so as not to overlap with the fusion joint portion of the sweat-absorbing quick-drying sheet.
<13>
The absorbent article according to any one of <1> to <12>, wherein the sweat-absorbing quick-drying sheet has a liquid remaining amount of 5 mg or less, preferably 1.7 mg or less.
<14>
In the sweat-absorbing quick-drying sheet, the lower limit of the evaporation time of the 50 μL × 1 drop liquid arranged on the skin contact surface is 5 minutes or more, and the 50 μL × 1 drop liquid arranged on the skin contact surface has a lower limit value of 5 minutes or more. The absorbent article according to any one of <1> to <13>, wherein the evaporation time is 13 minutes or less, preferably 10 minutes or less. <15>
The sweat-absorbing and quick-drying sheet adjusts to the maximum heat transfer rate in a wet state of the skin contact surface when 1 μL × 49 drops of liquid arranged in a range of 5 cm × 5 cm of the skin contact surface is absorbed for 2 minutes. The difference Δq-max (49) from the maximum heat transfer rate in a wet state is 0.15 kW / m ² or less, preferably 0.
The absorbent article according to <2>, which is a sheet of 13 kW / m ² or less, more preferably 0.10 kW / m ^{2 or less.}
<16>
The sweat-absorbing and quick-drying sheet has a maximum heat transfer rate and a humidity control state in a wet state of the skin contact surface when 5 μL × 49 drops of liquid are absorbed in a range of 7 cm × 7 cm of the skin contact surface for 2 minutes. The difference Δq-max (245) from the maximum heat transfer rate in is 0.3 kW / m ² or less, preferably 0.27 k.
The absorbent article according to <3> above, which is a sheet of W / m ² or less, more preferably 0.25 kW / m ^{2 or less.}
<17>
The absorbent article according to <10>, wherein the through hole of the sweat-absorbing quick-drying sheet has an area of 0.5 mm ² or more and 5 mm ² or less, preferably 0.75 mm ² or more and 4 mm ^{2 or less.}
<18>
The area of the opening portion penetrating the outer layer sheet is larger than the area of the fusion joint portion and is 1 mm ² or more and 5 mm ² or less, preferably 1.5 mm ² or more and 4 mm ² or less. Or the absorbent article according to <12>.

<19>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The ratio of the total area of the fusion spliced portion to the total area of the sweat-absorbing quick-drying sheet is 12% or less, preferably 10% or less, and 3% or more, preferably 5% or more. The absorbent article according to any one of ~ <18>.
<20>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The area of one of the fused joints is 2 mm ² or less, preferably 1.8 mm ² or less, and 0.3 mm ² or more, preferably 0.5 mm ² or more. > The absorbent article according to any one of.
<21>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The sweat-absorbing quick-drying sheet has a total basis weight of 40 g / m ² or less, preferably 35 g / m ² or less, and 15 g / m ² or more, preferably 20 g / m ² or more. The absorbent article according to any one of <20>.
<22>
The sweat-absorbing and quick-drying sheet is composed of a hydrophobic sheet and a hydrophilic sheet that overlap each other.
The sweat-absorbing and quick-drying sheet has a hydrophilic sheet having a basis weight of 9 g / m ² or more, preferably 13 g / m ² or more, and 20 g / m ² or less, preferably 18 g / m ² or less. Specifically, the absorbent article according to any one of <1> to <20>, which is 9 g / m ² or more and 20 g / m ² or less, preferably 13 g / m ² or more and 18 g / m ^{2 or less.}
<23>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The constituent fibers constituting the hydrophobic sheet, which is the hydrophobic layer, and the constituent fibers constituting the hydrophilic sheet, which is the hydrophilic layer, have different hydrophilicities in any one of <1> to <22>. Described absorbent article.
<24>
The difference in hydrophilicity between the constituent fibers constituting the hydrophobic sheet, which is the hydrophobic layer, and the constituent fibers constituting the hydrophilic sheet, which is the hydrophilic layer, is a difference of 10 degrees or more as a difference in contact angles of the constituent fibers. The absorbent article according to <23>, which is preferably present, and more preferably has a difference of 20 degrees or more.
<25>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
In the sweat-absorbing quick-drying sheet, the interfiber distance of the constituent fibers constituting the hydrophilic sheet, which is the hydrophilic layer, is shorter than the interfiber distance constituting the hydrophobic sheet, which is the hydrophobic layer.
The interfiber distance of the constituent fibers constituting the hydrophilic sheet, which is the hydrophilic layer, is 45 μm or less, preferably 35 μm or less, and 5 μm or more, preferably 10 μm or more, any of the above <1> to <24>. The absorbent article according to 1.
<26>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
In the sweat-absorbing quick-drying sheet, the hydrophobic sheet, which is the hydrophobic layer, has a basis weight of 9 g / m ² or more, preferably 10 g / m ² or more, and 20 g / m ² or less, preferably 18 g / m ^2. The absorbent article according to any one of <1> to <25> below.
<27>
The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The absorbent article according to any one of <1> to <26>, wherein the hydrophilic sheet, which is the hydrophilic layer, is a spunbonded non-woven fabric.
<28>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric having a multi-layer structure.
The ratio of the total area of the fusion spliced portion to the total area of the sweat-absorbing quick-drying sheet is 15% or less, preferably 13% or less, and 6% or more, preferably 8% or more. The absorbent article according to any one of <5> and <10> to <18>.

<29>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric formed by a fiber fixing portion for fixing a layer made of hydrophobic fibers and a hydrophilic layer made of hydrophilic fibers.
Any of the above <1> to <5>, <10> to <18>, and <28> in which the constituent fibers constituting the hydrophobic layer and the constituent fibers constituting the hydrophilic layer have different hydrophilicities. The absorbent article according to 1.
<30>
The difference in hydrophilicity between the constituent fibers constituting the hydrophobic layer and the constituent fibers constituting the hydrophilic layer is preferably a difference of 10 degrees or more as a difference in contact angles of the constituent fibers, and a difference of 20 degrees or more. The absorbent article according to <29>, which is more preferably present.
<31>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric having a multi-layer structure.
The area of one of the fused joints is 0.25 mm ² or less, preferably 0.2 mm ² or less, and 0.05 mm ² or more, preferably 0.1 mm ² or more. The absorbent article according to any one of <5>, <10> to <18>, and <28> to <30>.
<32>
The sweat-absorbing and quick-drying sheet is formed of a single non-woven fabric.
The sweat-absorbing and quick-drying sheet has a basis weight of 30 g / m ² or less.
The absorption according to any one of <1> to <5>, <10> to <18>, and <28> to <31>, wherein the interfiber distance of the constituent fibers constituting the hydrophilic layer is 45 μm or less. Sex goods.
<33>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric having a multi-layer structure.
The sweat-absorbing quick-drying sheet has an overall basis weight of 30 g / m ² or less, preferably 25 g / m ² or less, and 15 g / m ² or more, preferably 18 g / m ² or more. The absorbent article according to any one of <5>, <10> to <18>, and <28> to <32>.
<34>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric having a multi-layer structure.
The sweat-absorbing and quick-drying sheet has a hydrophilic layer having a basis weight of 5 g / m ² or more, preferably 9 g / m ² or more, and 15 g / m ² or less, preferably 13 g / m ² or less. The absorbent article according to any one of 1> to <5>, <10> to <18>, and <28> to <33>.
<35>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric having a multi-layer structure.
In the sweat-absorbing quick-drying sheet, the interfiber distance of the constituent fibers constituting the hydrophilic layer is shorter than the interfiber distance constituting the hydrophobic layer.
The interfiber distances of the constituent fibers constituting the hydrophilic layer are 45 μm or less, preferably 35 μm or less, and 5 μm or more, preferably 10 μm or more. , <28> to <34>.
<36>
The sweat-absorbing and quick-drying sheet is composed of a single non-woven fabric having a multi-layer structure.
The sweat-absorbing and quick-drying sheet has a basis weight of the hydrophobic layer of 5 g / m ² or more, preferably 9 g / m ² or more, and 15 g / m ² or less, preferably 13 g / m ² or less. The absorbent article according to any one of 1> to <5>, <10> to <18>, and <28> to <35>.
<37>
The sweat-absorbing and quick-drying sheet is formed of a single non-woven fabric.
The absorbent article according to any one of <1> to <5>, <10> to <18>, and <28> to <36>, wherein the hydrophilic layer is a melt blown layer.

<38>
The absorbent article comprises a ventral region and a dorsal region in the longitudinal direction thereof, and an inseam region located between them, and has an absorber over the ventral region and the dorsal region. It has a ventral waist flap and a dorsal waist flap that are located outward from each of the longitudinal anterior-posterior ends of the absorber and extend laterally.
The absorbent article according to any one of <1> to <37>, wherein the sweat-absorbing and quick-drying sheet is arranged at least on the dorsal waist flap.
<39>
The stretchable region has an outer layer sheet on the non-skin contact surface side forming the outer surface of the absorbent article and an inner layer sheet arranged on the skin contact surface side of the outer layer sheet.
There is a folded portion of the outer layer sheet on the skin contact surface side of the inner layer sheet.
The absorbent article according to any one of <1> to <38>, wherein the sweat-absorbing and quick-drying sheet is arranged on the most skin-contacting surface side of the stretchable region.
<40>
The stretchable region has an outer layer sheet on the non-skin contact surface side forming the outer surface of the absorbent article and an inner layer sheet arranged on the skin contact surface side of the outer layer sheet.
The sheet material constituting the outer layer sheet is folded back toward the skin contact surface side of the hydrophilic sheet along the peripheral edge of the waist opening of the absorbent article, and the folded portion is hydrophobic on the skin contact surface side most. The absorbent article according to any one of <1> to <26>, <38>, and <39>, which is a sex sheet and constitutes the sweat-absorbing and quick-drying sheet fixed to the hydrophilic sheet by a fusional joint. ..
<41>
The stretchable region has an outer layer sheet on the non-skin contact surface side forming the outer surface of the absorbent article and an inner layer sheet arranged on the skin contact surface side of the outer layer sheet.
The absorbent article comprises a ventral and dorsal regions in its longitudinal direction and an inseam region located between them.
In the outer layer sheet and the inner layer sheet, the fusional joints form a line in the vertical direction in the regions extending from the waist elastic portion to the lower waist elastic portion of each of the ventral region and the dorsal region. Any one of the above <1> to <40>, which is intermittently arranged in a plurality of rows of the fusion splicing portions composed of the plurality of the fusion splicing portions, which are arranged in a plurality of rows at intervals in the lateral direction. Absorbent article described in.
<42>
The distance between the fusion joints adjacent to each other in the longitudinal direction forming the vertically extending fusion joint row is 1 mm or more, preferably 3 mm or more, and 20 mm or less, preferably 18 mm or less. 41> The absorbent article.
<43>
The absorbent article has a plurality of laterally adjacent folds composed of the outer layer sheet or the inner layer sheet between adjacent fused joint rows, and the distance between the laterally adjacent folds. The absorbent article according to <41> or <42>, wherein is 4 mm or more, preferably 6 mm or more, and 20 mm or less, preferably 16 mm or less.
<44>
In the waist elastic portion of the absorbent article, a plurality of elastic members are arranged between a pair of outer fixed regions.
The plurality of elastic members are fixed between the outer layer sheet and the inner layer sheet in each of the pair of outer fixing regions, while the outer layer sheet and the inner layer are fixed between the pair of outer fixing regions. The absorbent article according to any one of <41> to <43>, which is not fixed to any of the sheets.
<45>
The elastic region of the absorbent article has the sweat-absorbing quick-drying sheet and an outer layer sheet arranged on the non-skin contact surface side of the sweat-absorbing quick-drying sheet, and the sweat-absorbing quick-drying sheet and the outer layer sheet. A convex portion in which the outer layer sheet swells toward the non-skin side due to contraction of a plurality of elastic members arranged in a laterally extended state of the absorbent article and intermittently arranged in the vertical direction of the absorbent article. And recesses recessed on the skin side have gathered portions that are alternately formed in the width direction of the absorbent article.
A cross-sectional view of the gathered portion in a state where the stretchable region is extended by 70%, from a position of half the depth of the concave portion recessed on the skin side of the outer layer sheet to the convex portion side expanding on the non-skin side. The absorbent article according to <11> or <12>, wherein the perforated portion is arranged.
<46>
The elastic region of the absorbent article has the sweat-absorbing quick-drying sheet and an outer layer sheet arranged on the non-skin contact surface side of the sweat-absorbing quick-drying sheet, and the sweat-absorbing quick-drying sheet and the outer layer sheet. The sweat-absorbing quick-drying sheet swells toward the skin due to the contraction of a plurality of elastic members arranged in a laterally extended state of the absorbent article and intermittently arranged in the vertical direction of the absorbent article. It has a gathered portion in which a portion and a recess recessed on the non-skin side are alternately formed in the width direction of the absorbent article.
When the gathered portion is viewed in cross section, the entire 60 of the fused joint portion 8 is formed from a position of half the depth of the concave portion recessed on the non-skin side of the sweat-absorbing quick-drying sheet to the convex portion side bulging toward the skin side. The absorbent article according to any one of <1> to <45>, wherein% or more is arranged.
<47>
The sweat-absorbing and quick-drying sheet is composed of a hydrophobic sheet and a hydrophilic sheet that overlap each other.
The sweat-absorbing quick-drying sheet has a recessed portion that is recessed from the hydrophobic sheet side toward the hydrophilic sheet side in the thickness direction, and the recessed portion is provided with the fusion joint portion, and the recessed portion is provided. The absorbent article according to any one of <1> to <46>, wherein the thickness thereof becomes smaller as it approaches the fusional joint.
<48>
The sweat-absorbing and quick-drying sheet is composed of a hydrophobic sheet and a hydrophilic sheet that overlap each other.
The sweat-absorbing quick-drying sheet has a recessed portion that is recessed from the hydrophobic sheet side toward the hydrophilic sheet side in the thickness direction, and the fusion-bonded portion is provided in the recessed portion, and the fusion-bonded joint is provided. The absorbent article according to any one of <1> to <47>, wherein the thickness of the portion is 1/3 or less of the thickness of the portion of the sweat-absorbing quick-drying sheet excluding the recessed portion.

Hereinafter, the pants-type disposable diaper of the present invention will be described in more detail with reference to Examples. However, the scope of the present invention is not limited by such examples.

[Example 1]
As a sweat-absorbing and quick-drying sheet, one non-woven fabric formed by fixing two rectangular sheets having a length of 350 mm in the MD direction and a length of 50 mm in the CD direction was prepared. The hydrophobic sheet 4 constituting the sweat-absorbing and quick-drying sheet was a spunbonded non-woven fabric ^{having a basis weight of 12 g / m 2.} The hydrophilic sheet 5 constituting the sweat-absorbing and quick-drying sheet KS was a spunbonded non-woven fabric ^{having a basis weight of 18 g / m 2.} As shown in FIG. 3, the hydrophobic sheet 4 and the hydrophilic sheet 5 are superposed on each other and bonded and fixed at the fusion splicing portion 8 using a thermal embossing device to form a non-woven fabric sweat-absorbing quick-drying sheet. Made. The prepared sweat-absorbing and quick-drying sheet of Example 1 was used so that its skin contact surface became the hydrophobic sheet 4. The ratio of the total area of the fusion splicing portion 8 to the total area of the sweat-absorbing quick-drying sheet of Example 1 produced is 3.6%, and one area of each fusion splicing portion 8 is 0.8 mm ² . there were. The fusion splicing portions 8 were dispersedly arranged so that a part of at least one fusion splicing portion was arranged in the virtual circle 1R having a radius of 2 mm.

[Example 2]
As the hydrophobic sheet 4, ^{a hydrophobic spunbonded non-woven fabric of 17 g / m 2} was used, the same hydrophilic spunbonded non-woven fabric as in Example 1 was superposed, and fused using a thermal embossing device as shown in FIG. The non-woven fabric was made of a sweat-absorbing quick-drying sheet KS by joining and fixing at the joining portion 8. The ratio of the total area of the fusion splicing portion 8 to the total area of the sweat-absorbing quick-drying sheet of Example 2 produced is 12.0%, and one area of each fusion splicing portion 8 is 1.3 mm ² . there were. The fusion splicing portions 8 were dispersedly arranged so that a part of at least one fusion splicing portion was arranged in a virtual circle 1R having a radius of 2 mm.

[Example 3]
As the hydrophobic sheet 4, ^{a hydrophobic spunbonded non-woven fabric of 9 g / m 2} was used, the same hydrophilic spunbonded non-woven fabric as in Example 1 was superposed, and fused using a thermal embossing device as shown in FIG. A sweat-absorbing and quick-drying sheet of a non-woven fabric was prepared by joining and fixing at the joining portion 8. The ratio of the total area of the fusion splicing portion 8 to the total area of the sweat-absorbing quick-drying sheet of Example 3 produced was 6.0%, and one area of each fusion splicing portion 8 was 1.3 mm ² . there were. In the fusion splicing portion 8, a part of one fusion splicing portion is not necessarily arranged in the virtual circle 1R having a radius of 2 mm, and at least one fusion splicing portion is arranged in the virtual circle 1R having a radius of 3 mm. It was distributed so that a part of the part was arranged.

[Example 4]
The sweat-absorbing and quick-drying sheet of Example 4 was produced in the same manner as the non-woven fabric of Example 3 except that the hydrophilic melt-blown non-woven fabric having a basis weight of 20 g / m ^{2 was used as the hydrophilic sheet 5.}

[Comparative Example 1]
As a sweat-absorbing and quick-drying sheet, an air-through non-woven fabric in which 75% of hydrophilic fibers having a basis weight and 25% of hydrophobic fibers as shown in Table 1 below are mixed with a sheet forming a skin contact surface is used, and a non-skin contact surface is used. A hydrophilic spunbonded non-woven fabric having a basis weight shown in Table 1 below was used for the sheet constituting the above, and the sheet was adhered with an adhesive. The mixed cotton air-through non-woven fabric and the hydrophilic sheet on the skin contact surface did not undergo fusion bonding with a heat embossing device and did not have the fusion bonding portion 8.

[Comparative Example 2]
A sweat-absorbing quick-drying sheet of Comparative Example 2 was produced in the same manner as the nonwoven fabric of Example 3 except that the hydrophobic sheet 4 was changed to a hydrophilic spunbonded nonwoven fabric having a basis weight of 17 g / m ^2.

[Comparative Example 3]
Sweat-absorbing and quick-drying of Example 1 except that a ^{17 g / m 2} hydrophobic spunbonded non-woven fabric was used as the hydrophobic sheet 4 ^{and the hydrophilic sheet 5 was changed to a 36 g / m 2 hydrophobic spunbonded non-woven fabric.} A sweat-absorbing quick-drying sheet of Comparative Example 3 was produced in the same manner as the sheet.

<Evaluation of liquid remaining amount, liquid evaporation time, difference Δq-max (49), and difference Δq-max (245)>
With respect to the sweat-absorbing quick-drying sheets of Examples 1 to 4 and Comparative Examples 1 to 3, the amount of liquid remaining, the evaporation time of the liquid, the difference Δq-max (49), and the difference Δq-max (245) were determined by the above-mentioned methods. Each was measured. The results are shown in Table 1 below.

<Performance evaluation>
The performance of the sweat-absorbing quick-drying sheets obtained in Examples 1 to 4 and the sheets obtained in Comparative Examples 1 to 3 was evaluated as follows.
From the sweat-absorbing and quick-drying sheets obtained in Examples and Comparative Examples, test pieces of 5 cm × 5 cm were cut out and used as evaluation samples.
The panelists were allowed to spend 5 minutes in a constant temperature and constant humidity environment with a room temperature of 27 ° C. and a relative humidity of 50%. After that, the evaluation sample is attached to the left and right upper backs of the paneler so that the skin contact surface abuts on the paneler's skin, and a sweat meter (NS5100 (PMX-002) manufactured by Squinos) within 5 cm from the evaluation sample. Was attached. The panelist was seated on a chair, and the upper ankles of both feet were immersed in warm water at 41 ° C. to take a foot bath and rest. When the amount of perspiration measured by the sweat meter ^{exceeded 0.1 mg / min / cm 2} for 25 minutes, both feet were taken out of warm water, rested for 5 minutes, the sample was removed, and the skin feel was as follows. Evaluation was made based on the evaluation criteria.

4 points: No sweat remains on the skin, the skin becomes smooth after 5 minutes of sweat absorption 3 points: No sweat remains on the skin, the skin does not become sticky after 5 minutes of sweat absorption 2 points: No sweat remains on the skin, but sweat absorption 5 Skin becomes sticky after minutes 1 point: Sweat remains on the skin, skin becomes sticky after 5 minutes of sweat absorption

Five panelists made similar evaluations, and the average value was used as the evaluation standard for sweat absorption and quick-drying power.

In addition, the sweat-absorbing and quick-drying sheets obtained in Examples 1 to 4 each had a plurality of recessed portions, and each of the recessed portions was provided with the fusion-bonded joint. Then, in the sweat-absorbing and quick-drying sheets obtained in Examples 1 to 4, the thickness of the recessed portion became smaller as it approached the fusion-bonded portion. Further, with respect to the sweat-absorbing quick-drying sheets obtained in Examples 1 to 4, when measured as described above, the thickness of the fusion-bonded portion is the thickness of the portion of the sweat-absorbing quick-drying sheet excluding the recessed portion. It turned out that it was less than 1/3.

According to the results in Table 1, the sweat-absorbing and quick-drying sheets of Examples 1 to 4 have a smaller amount of liquid remaining and a shorter liquid evaporation time than the sheets of Comparative Examples 1 to 3. It was. Further, the sweat-absorbing and quick-drying sheets of Examples 1 to 4 were sheets having a smaller difference Δq-max (49) than the sheets of Comparative Examples 1 to 3. Further, the sweat-absorbing and quick-drying sheets of Examples 1 to 4 were sheets having a smaller difference Δq-max (245) than the sheets of Comparative Examples 1 to 3. As shown in Table 1, the sweat-absorbing and quick-drying sheets of Examples 1 to 4 satisfying the above requirements were found to have higher sweat-absorbing and quick-drying power than the sheets of Comparative Examples 1 to 3. Therefore, if a pants-type disposable diaper in which the sweat-absorbing and quick-drying sheets of Examples 1 to 4 are arranged on the skin contact surface side of the elastic region, small sweat droplets at the beginning of scratching can be absorbed, and eczema, eczema, It can be expected to reduce skin problems such as heat rash and rash.

1 Absorbent article (pants-type disposable diaper)
2 Absorbent body 21 Front surface sheet 22 Back surface sheet 23 Absorbent 24 Leakage-proof cuff 25 Elastic member for forming leak-proof cuff 3 Exterior body 3i Inner layer sheet 32 Exterior body joint L Fusion joint row 4 Hydrophobic layer (hydrophobic sheet)
5 Hydrophilic layer (hydrophilic sheet)
6 Outer layer sheet 6R Folded part 71 Elastic member 72 Leg elastic member 8 Fusion joint 9 Adhesive KS Sweat-absorbent quick-drying sheet A Ventral region, B Dorsal region, C Inseam region

Claims (14)

An absorbent article with a stretchable area
The stretchable region has a sweat-absorbing quick-drying sheet composed of at least two layers on the skin contact surface side thereof.
The sweat-absorbing and quick-drying sheet is composed of a hydrophobic hydrophobic layer composed of hydrophobic fibers forming a skin contact surface and hydrophilic fibers arranged adjacent to the non-skin contact surface of the hydrophobic layer. It includes a formed hydrophilic hydrophilic layer, and has a hydrophobic layer and a plurality of fusion-bonded portions for fixing the hydrophilic layer.
The sweat-absorbing quick-drying sheet is a sheet in which the amount of liquid remaining when 1 μL × 49 drops of liquid arranged in a range of 5 cm × 5 cm on the skin contact surface is absorbed in 60 seconds is 10 mg or less, and the above-mentioned liquid 50 [mu] L × 1 drop which arranged the skin contact surface, Ri sheets der evaporate within 15 minutes,
The absorbent article has an exterior and
The exterior body has an outer layer sheet and a hydrophilic separate sheet separate from the outer layer sheet.
The outer layer sheet has a plurality of openings that penetrate the outer layer sheet.
The outer layer sheet includes a folded portion that is folded back so as to cover the skin contact surface side of the separate sheet.
The quick drying sweat sheet, said other sheet a folded portion of the outer layer sheet that is formed by overlapping the absorbent article. An absorbent article with a stretchable area
The stretchable region has a sweat-absorbing quick-drying sheet composed of at least two layers on the skin contact surface side thereof.
The sweat-absorbing and quick-drying sheet is composed of a hydrophobic hydrophobic layer composed of hydrophobic fibers forming a skin contact surface and hydrophilic fibers arranged adjacent to the non-skin contact surface of the hydrophobic layer. It includes a formed hydrophilic hydrophilic layer, and has a hydrophobic layer and a plurality of fusion-bonded portions for fixing the hydrophilic layer.
The sweat-absorbing quick-drying sheet is a sheet in which the amount of liquid remaining when 1 μL × 49 drops of liquid arranged in a range of 5 cm × 5 cm on the skin contact surface is absorbed in 60 seconds is 10 mg or less, and the above-mentioned liquid 50 [mu] L × 1 drop which arranged the skin contact surface, Ri sheets der evaporate within 15 minutes,
The stretchable region has an outer layer sheet on the non-skin contact surface side forming the outer surface of the absorbent article and an inner layer sheet arranged on the skin contact surface side of the outer layer sheet.
There is a folded portion of the outer layer sheet on the skin contact surface side of the inner layer sheet.
Most skin the quick drying sweat sheet contact surface side that has been arranged, the absorbent article of the stretchable region. The sweat-absorbing and quick-drying sheet has a maximum heat transfer rate and a humidity control state in a wet state of the skin contact surface when 1 μL × 49 drops of liquid are absorbed in a range of 5 cm × 5 cm of the skin contact surface for 2 minutes. The absorbent article according to claim 1 or 2 , wherein the difference Δq-max (49) from the maximum heat transfer rate in the above sheet is ^{0.15 kW / m 2 or less.} The sweat-absorbing quick-drying sheet has a maximum heat transfer rate and a humidity control state in a wet state of the skin contact surface when 5 μL × 49 drops of liquid are absorbed in a range of 7 cm × 7 cm of the skin contact surface for 2 minutes. Claim 1 is a sheet in which the difference Δq-max (245) from the maximum heat transfer rate in the above is 0.3 kW / m ^{2 or less.}
The absorbent article according to any one of 3 to 3. The fusion-bonded joints are dispersed and arranged over the entire hydrophobic layer so that at least a part of the fusion-bonded joints is included in a virtual circle having a radius of 3 mm in a plan view of the sweat-absorbing quick-drying sheet. The absorbent article according to any one of claims 1 to 4. The absorbency according to any one of claims 1 to 5 , wherein the hydrophilic layer of the sweat-absorbing quick-drying sheet has the orientation direction of the constituent fibers constituting the hydrophilic layer coincident with the expansion / contraction direction of the expansion / contraction region. Goods. The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The ratio of the total area of the fusion spliced portion to the total area of the sweat-absorbing quick-drying sheet is 12% or less.
The absorbent article according to any one of claims 1 to 6 , wherein the fusional joint has an area of 2 mm ^{2 or less.} The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The sweat-absorbing and quick-drying sheet has a basis weight of 40 g / m ² or less.
The hydrophilic sheet which is the hydrophilic layer has a basis weight of 9 g / m ² or more and 20 g / m ² or less, and the interfiber distance of the constituent fibers constituting the hydrophilic sheet is 45 μm or less. The absorbent article according to any one of 7. The sweat-absorbing and quick-drying sheet is composed of a plurality of sheets stacked on top of each other.
The absorbent article according to any one of claims 1 to 8, wherein the hydrophobic sheet, which is the hydrophobic layer, has a basis weight of 9 g / m ² or more and 20 g / m ^{2 or less.} The sweat-absorbing and quick-drying sheet is formed of a single non-woven fabric.
The ratio of the total area of the fusion spliced portion to the total area of the sweat-absorbing quick-drying sheet is 15% or less.
The absorbent article according to any one of claims 1 to 6 , wherein the fusional joint has an area of 0.25 mm ^{2 or less.} The absorbent article according to any one of claims 1 to 10 , wherein the sweat-absorbing quick-drying sheet has a plurality of through holes penetrating the sweat-absorbing quick-drying sheet. It said opening of said outer sheet is at least partially, the absorbent article according to claim 1 which is arranged so as not to overlap with the melt bonded portion of the quick drying sweat sheet. The stretchable region has an outer layer sheet on the non-skin contact surface side forming the outer surface of the absorbent article and an inner layer sheet arranged on the skin contact surface side of the outer layer sheet.
The sheet material constituting the outer layer sheet is folded back toward the skin contact surface side of the hydrophilic sheet along the peripheral edge of the waist opening of the absorbent article, and the folded portion is hydrophobic on the skin contact surface side most. The absorbent article according to any one of claims 1 to 9 , which is a sex sheet and constitutes the sweat-absorbing quick-drying sheet fixed to the hydrophilic sheet by a fusional joint. The elastic region of the absorbent article has the sweat-absorbing quick-drying sheet and an outer layer sheet arranged on the non-skin contact surface side of the sweat-absorbing quick-drying sheet, and the sweat-absorbing quick-drying sheet and the outer layer sheet. A convex portion in which the outer layer sheet swells toward the non-skin side due to contraction of a plurality of elastic members arranged in a laterally extended state of the absorbent article and intermittently arranged in the vertical direction of the absorbent article. And recesses recessed on the skin side have gathered portions that are alternately formed in the width direction of the absorbent article.
A cross-sectional view of the gathered portion in which the stretchable region is extended by 70% is seen, and the convex portion side that bulges toward the non-skin side from a position of half the depth of the concave portion that is recessed toward the skin side of the outer layer sheet. The absorbent article according to claim 1 or 12 , wherein the perforated portion is arranged.

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