JP2023103806A - absorbent article - Google Patents

Abstract

To provide an absorbent article capable of smoothly discharging steam between a wearer and an absorption member to an outer side.SOLUTION: An absorbent article 1 includes: an absorption member 10 which absorbs a body fluid of a wearer P; and an exterior sheet 20 which covers a non-skin surface of the absorption member 10 and where an end part 20a in a longitudinal direction L is stretchable in a width direction W. An inner surface sheet 40 to have contact with the wearer P and to cover an end part 10a of the absorption member 10 in the longitudinal direction L is arranged in the end part 20a of the exterior sheet 20 in the longitudinal direction L. An arrangement area where the inner surface sheet 40 is arranged on the exterior sheet 20 includes: an adhesion area 50 where the inner surface sheet 40 adheres to the exterior sheet 20; and non-adhesion areas 51 which have predetermined lengths in the longitudinal direction L and in the width direction W and where the inner surface sheet 40 does not adhere to the exterior sheet 20. In the inner surface sheet 40, at least two gaps 53 extending in the width direction W and aligned in the longitudinal direction L are formed at positions to overlap with the non-adhesion area 51.SELECTED DRAWING: Figure 2

Description

The present invention relates to absorbent articles.

Conventionally, there has been known a diaper (absorbent article) in which exterior sheets forming a waist region surrounding the waist of a wearer are attached to both ends in the longitudinal direction of an absorbent member (see, for example, Patent Document 1). Here, the outer sheet is attached to the absorbent member via a plurality of joints intermittently arranged in the waist direction (width direction). In addition, the outer sheet is stretchable in the waist direction (width direction). Therefore, when the outer sheet shrinks, the non-joint portion, which is present between the joined portions and does not join the absorbent member and the outer sheet, bends. Thus, a longitudinally extending first ventilation path is formed between the absorbent member and the wearer, and a longitudinally extending second ventilation path is formed between the absorbent member and the exterior sheet. Vapor inside the diaper is guided to the waist region through the wearer's abdomen or back through the first air passage, and the vapor in the waist region is discharged to the outside of the diaper through the second air passage.

Further, a diaper (absorbent article) is known in which an absorbent member is arranged on the wearer's side of an outer sheet consisting of an outer layer sheet and an inner layer sheet, and the ends of the outer sheet are folded back to sandwich both longitudinal ends of the absorbent member. (See, for example, Patent Document 2). Here, both ends of the exterior sheet in the longitudinal direction can be stretched in the waist direction (width direction). At both ends of the exterior sheet in the longitudinal direction, the outer layer sheet and the inner layer sheet are joined at a plurality of exterior body joining portions intermittently arranged in both the longitudinal direction and the waist direction. Furthermore, a through-hole is formed through the outer layer sheet and the inner layer sheet in the groove portion located outside the longitudinal end portion of the absorbent member. Therefore, when the exterior sheet shrinks and the outer layer sheet and the inner layer sheet between the exterior body joints are flexed, respectively, grooves extending in the longitudinal direction are formed at both ends of the exterior sheet in the longitudinal direction. The steam is discharged from the groove through the through holes to the outside of the diaper.

JP 2009-61127 A JP 2017-99854 A

By the way, in conventional absorbent articles, the vapor between the wearer and the absorbent member, which is the vapor inside the diaper, is discharged between the outer sheet and the absorbent member or through the through holes formed in the outer sheet. be done. However, for example, when the wearer is in a supine position, the outer sheet is covered with bedding or the like, which may hinder the smooth discharge of steam.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an absorbent article capable of smoothly discharging steam between a wearer and an absorbent member to the outside.

In order to achieve the above object, the present invention provides an absorbent member that absorbs bodily fluids of the wearer, and an absorbent member that covers the non-skin surface of the absorbent member and extends in the longitudinal direction from the abdominal side of the wearer to the dorsal side via the crotch. an absorbent article in which the longitudinal end of the exterior sheet is stretchable in a width direction orthogonal to the longitudinal direction, wherein the longitudinal end of the exterior sheet is provided with an inner sheet that contacts the wearer and covers the ends of the absorbent member in the longitudinal direction. The arrangement area in which the inner sheet is arranged on the outer sheet includes an adhesion area for bonding the inner sheet to the outer sheet, and the inner sheet having predetermined lengths in the longitudinal direction and the width direction. and a non-adhesive region where the outer sheet is not adhered to the exterior sheet, and the inner sheet has at least two cuts extending in the width direction and aligned in the longitudinal direction at positions overlapping the non-adhesive region. .

Thereby, the absorbent article of the present invention can smoothly discharge steam between the wearer and the absorbent member to the outside.

1 is a perspective view showing a state in which the absorbent article of Example 1 is worn. FIG. 1 is a plan view showing an expanded absorbent article of Example 1. FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2; FIG. 3 is a diagram schematically showing a BB cross-sectional view in FIG. 2; FIG. 3 is an enlarged view showing a C portion in FIG. 2; (a) is an explanatory diagram showing a first modified example of a break. (b) is an explanatory diagram showing a second modification of the cut. (c) is an explanatory diagram showing a third modification of the cut. FIG. 3 is an explanatory diagram showing a state in which a portion D in FIG. 2 is contracted; FIG. 10 is a plan view of a main part of an absorbent article of a first modified example; FIG. 11 is a plan view of a main part of an absorbent article of a second modified example; FIG. 11 is a plan view of a main part of an absorbent article of a third modified example; FIG. 11 is an enlarged plan view of a main part of an absorbent article of a fourth modified example; FIG. 12 is a diagram schematically showing the EE cross-sectional view in FIG. 11; FIG. 11 is a perspective view schematically showing a main part of an absorbent article of a fourth modified example; FIG. 11 is a plan view showing a state in which an absorbent article of a fifth modified example is expanded and viewed from the outside;

A mode for carrying out the absorbent article of the present invention will be described based on Example 1 shown in the drawings. In this specification, the longitudinal direction L is the direction from the ventral side of the wearer P who wears the absorbent article 1 to the back side through the crotch, and the width direction W is the direction orthogonal to the longitudinal direction L. be done. Moreover, in this specification, terms such as "up and down", "left and right", and "front and back" are used with the wearer P as a reference. Further, FIGS. 2 and 3 show the absorbent article in a stretched state.

The absorbent article 1 of Example 1 is, for example, a disposable underpants-type paper diaper, and is used to absorb bodily fluids such as urine of the wearer P, as shown in FIG. The absorbent article 1 includes an absorbent member 10, an outer sheet 20, and an inner sheet 40 (see FIG. 2).

The absorbent member 10 has a top sheet 11, a back sheet (not shown), an absorbent core 13, and gathers sheets 14, and absorbs body fluids of the wearer P. Here, the absorbent member 10 is laminated in order of a back sheet, an absorbent core 13, a top sheet 11, and a gather sheet 14, the top sheet 11 facing the wearer P when the absorbent article 1 is worn, and the back sheet facing the wearer P. It faces the seat 20 . The gather sheets 14 are arranged on both sides in the width direction of the top sheet 11 and face the wearer P when the absorbent article 1 is worn.

The top sheet 11 is made of a liquid-permeable sheet material that is permeable to body fluids. In addition to synthetic fibers such as olefin-based, polyester-based, and amide-based fibers such as polyethylene and polypropylene, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used as material fibers constituting the nonwoven fabric.

The back sheet is composed of a liquid-impermeable sheet material that does not allow body fluids to pass therethrough, and for example, a polyethylene film or the like can be used. For the back sheet, a sheet material having moisture permeability without impairing liquid impermeability (water impermeability) may be used in order to prevent stuffiness. Such a liquid-impermeable/moisture-permeable sheet material is obtained by, for example, forming a sheet by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, and then stretching it uniaxially or biaxially. Porous sheets can be used.

The absorptive core 13 presents a belt-like elongated shape in a plan view having a narrow constricted region in the middle portion in the longitudinal direction L. As shown in FIG. The absorbent core 13 is made of a material capable of absorbing and retaining bodily fluids, including a pile of pulp fibers, an aggregate of filaments such as cellulose acetate, non-woven fabric, and the like. The absorbent core 13 may be formed by mixing and adhering particulate superabsorbent polymers as needed. The absorbent core 13 may also contain superabsorbent polymer fibers, polymer particles other than superabsorbent polymer particles, inorganic particles, and the like. The absorbent core 13 may be composed of one layer, or may be composed of a laminate composed of a plurality of layers. Also, the absorbent core 13 is preferably wrapped with a packaging sheet such as nonwoven fabric or crepe paper. Furthermore, an intermediate sheet can be interposed between the top sheet 11 and the absorbent core 13 . By providing the intermediate sheet, it is possible to prevent backflow of body fluids absorbed by the absorbent core 13 . Therefore, as the intermediate sheet, it is preferable to use materials with low water retention and high liquid permeability, such as various nonwoven fabrics and mesh films.

The gather sheet 14 is made of a liquid-impermeable sheet material that does not allow body fluids to pass therethrough, such as a plastic sheet or a non-woven fabric. From the standpoint of good feel to the skin of the wearer P, the gather sheet 14 is preferably a non-woven fabric that has undergone a water-repellent treatment with silicone or the like. A linear elastic member 14 a extending in the longitudinal direction L is attached to the gather sheet 14 . The elastic member 14a is made of an elastic material such as a string, string, band (tape), or the like. The elastic material includes natural rubber or synthetic rubber such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, and polyester.

The gathered sheet 14 forms a three-dimensional gather that rises toward the wearer P by the contractile force of the elastic member 14a. The three-dimensional gathers are wall-like portions that are provided on both sides in the width direction W of the absorbent core 13 and that can expand and contract along the longitudinal direction L of the absorbent member 10 . The three-dimensional gathers follow the groin of the wearer P when the absorbent article 1 is worn, and prevent bodily fluids from leaking from between the wearer P and the absorbent article 1 (so-called side leakage).

As shown in FIG. 2 , the exterior sheet 20 has an elongated belt-like shape as a whole when viewed from above with the absorbent article 1 unfolded, and extends along the longitudinal direction L. As shown in FIG. The absorbent member 10 is placed in the central portion of the exterior sheet 20, and the entire surface of the back sheet is fixed to the exterior sheet 20 by adhesion.

In addition, the exterior sheet 20 has a front region 21 that faces the abdomen of the wearer P at one end 20a in the longitudinal direction L, and faces the back of the wearer P at the other end 20b in the longitudinal direction L. A rear region 22 is set. One longitudinal end 10a of the absorbent member 10 overlaps the front region 21 of the exterior sheet 20 in plan view. The other end 10b of the absorbent member 10 in the longitudinal direction L overlaps the rear region 22 of the outer sheet 20 in plan view.

Further, the exterior sheet 20 has a constricted area 23 narrower than the front area 21 and the rear area 22 at the intermediate portion in the longitudinal direction L. As shown in FIG. The outer sheet 20 is bent at the middle portion in the longitudinal direction L, and both side portions (both ends in the width direction W) 20c and 20d of the front region 21 and the rear region 22 are joined to each other to adjust the waist of the wearer P. Construct a girth to cover.

Both ends 20a and 20b of the exterior sheet 20 in the longitudinal direction L, that is, the front region 21 and the rear region 22 expand and contract in the width direction W. That is, as shown in FIG. 3, the exterior sheet 20 of Example 1 has an outermost sheet 24, an elastic member 30, a first pressing sheet 33a, and a second pressing sheet 33b.

The outermost sheet 24 is made of a liquid-impermeable sheet material that does not allow body fluids to pass therethrough, and for example, the same material as the back sheet of the absorbent member 10 can be used. The outermost sheet 24 extends along the longitudinal direction L and forms the entire outer sheet 20 . The non-skin surface of the outermost sheet 24 (the surface in contact with the clothes of the wearer P or the surface facing the clothes) may be covered with a sheet material such as nonwoven fabric.

The stretchable members 30 are provided at both ends 20a and 20b of the outermost sheet 24 in the longitudinal direction L, respectively, and stretch the outermost sheet 20 at least in the width direction W. As shown in FIG. The stretchable member 30 of Example 1 has a plurality of thread-like elastic members 31 and an elastic sheet 32, as shown in FIGS.

The thread-like elastic member 31 is made of the same thread-like, string-like, band-like (tape-like) elastic material as the elastic member 14 a of the gather sheet 14 , and is formed by the opening of the waist portion formed by the outer sheet 20 (the opening of the outer sheet 20 ). provided at both edges in the longitudinal direction L). The plurality of thread-like elastic members 31 are arranged in parallel along the width direction W and spaced apart in the longitudinal direction L (see FIG. 2). As shown in FIG. 3, the thread-like elastic member 31 has a first pressing sheet 33a that presses the elastic sheet 32 in a state of being stretched to a predetermined length, and a second pressing sheet 33a provided inside the opening of the waist portion. 2 It is fixed by being sandwiched between it and the pressing sheet 33b. In the first embodiment, the second pressing sheet 33b is a sheet member separate from the outermost sheet 24. For example, the longitudinal ends of the outermost sheet 24 are folded inward in the longitudinal direction L to It may be used as the second pressing sheet 33b. That is, the outermost sheet 24 and the second pressing sheet 33b may be integrated.

The elastic sheet 32 is formed of a sheet-like resin sheet that is stretchable in the width direction W, and is arranged in each of the front region 21 and the rear region 22 . Then, as shown in FIG. 3, the elastic sheet 32 is sandwiched between the outermost outer sheet 24 and the first pressing sheet 33a while being stretched to a predetermined length.

The first pressing sheet 33a and the second pressing sheet 33b are both liquid-impermeable sheet materials that do not allow body fluids to pass therethrough, and can be made of the same material as the outermost sheet 24, for example. The first pressing sheet 33a is, for example, adhered to the outermost sheet 24 in a spaced linear pattern, or fixed via hot-melt adhesion applied to a stretchable member such as thread rubber. The second pressing sheet 33b is, for example, adhered to the first pressing sheet 33a in a spaced linear pattern, or fixed to the thread-like elastic member 31 via hot-melt adhesive.

In Example 1, the longitudinal end portion of the outermost sheet 24 is covered with the first pressing sheet 33a, and the thread-like elastic member 31 is sandwiched between the first pressing sheet 33a and the second pressing sheet 33b. shown. However, it is not limited to this. For example, the thread-like elastic members 31 may be arranged directly at the ends of the outermost sheet 24 in the longitudinal direction, and the outermost sheet 24 may be folded back to sandwich the thread-like elastic members 31 . In addition, by arranging the thread-like elastic members 31 at the ends of the outermost sheet 24 in the longitudinal direction and fixing the second pressing sheet 33b formed separately from the outermost sheet 24 to the outermost sheet 24, the outermost sheet 24 can be The thread-like elastic member 31 may be sandwiched between the exterior sheet 24 and the second pressing sheet 33b.

Both the thread-like elastic member 31 and the elastic sheet 32 are sandwiched between the sheets while being stretched to a predetermined length along the width direction W. As shown in FIG. Therefore, the outermost sheet 24, the first pressing sheet 33a, and the second pressing sheet 33b are in a natural state (a state in which they are not stretched) due to contraction of the thread-like elastic members 31 and the elastic sheet 32. shrinks integrally along the As a result, a plurality of folds H (see FIG. 4) arranged in the width direction W are formed at both ends 20a and 20b of the exterior sheet 20 in the longitudinal direction L. As shown in FIG.

As shown in FIG. 2, the inner sheet 40 is arranged at both ends 20a and 20b of the exterior sheet 20 in the longitudinal direction L, that is, the front region 21 and the rear region 22 of the exterior sheet 20, respectively. The inner sheet 40 covers both ends 10a and 10b of the absorbent member 10 in the longitudinal direction L, and contacts the wearer P inside the waist portion. The inner sheet 40 is adhered to the exterior sheet 20 to sandwich and fix both ends 10a and 10b in the longitudinal direction L of the absorbent member 10 .

The inner sheet 40 is, for example, a liquid-impermeable sheet material that does not permeate body fluids, and prevents body fluids from leaking from between the wearer P and the waist opening (so-called back leakage, abdominal leakage). In other words, the inner sheet 40 is a back leakage (abdominal leakage) prevention sheet. The inner sheet 40 can be made of the same material as the outermost sheet 24, for example. Furthermore, the inner sheet 40 shrinks along the width direction W integrally with the outer sheet 20 due to the contractile force of the elastic members 30 (the thread-like elastic members 31 and the elastic sheets 32).

In addition, an adhesive area 50 and a non-adhesive area 51 are provided in the area where the inner sheet 40 is arranged on the exterior sheet 20 . It should be noted that "the area where the inner sheet 40 is arranged on the outer sheet 20" is the area where the outer sheet 20 and the inner sheet 40 face each other. In Example 1, the front area 21 and the rear area 22 are "areas where the inner sheet 40 is arranged on the exterior sheet 20".

The adhesion area 50 is an area where the inner sheet 40 is adhered to the exterior sheet 20 . That is, in the adhesive region 50, the inner sheet 40 is fixed to the exterior sheet 20 via hot melt, adhesive, or the like. Glue areas 50 are indicated with dots (shading) in FIG.

The non-bonded region 51 is a region where the inner sheet 40 is not bonded to the outer sheet 20 and has a predetermined width in the longitudinal direction L and the width direction W. As shown in FIG. In Example 1, the non-adhesive region 51 is indicated by a dashed line in FIG. 2 and has a rectangular shape in plan view. In addition, the non-bonded area 51 is provided at a position where the inner sheet 40 and the first pressing sheet 33a face each other in the first embodiment, and is surrounded by the bonded area 50 . Since the inner sheet 40 is not adhered to the non-bonded area 51 , a gap is generated between the inner sheet 40 and the exterior sheet 20 .

Furthermore, as shown in FIG. 2, in the front region 21, two non-adhesive regions 51 are arranged side by side at a predetermined interval along the longitudinal direction L and at a predetermined interval along the width direction W. A plurality (here, seven) are arranged side by side. Further, in the rear region 22, a plurality of (here, seven) non-bonded regions 51 are provided at predetermined intervals along the width direction W, and arranged in a row in the longitudinal direction L. That is, in the front region 21, a plurality of non-bonded regions 51 are provided in rows in both the longitudinal direction L and the width direction W, and in the rear region 22, a plurality of non-bonded regions 51 are provided in a row only in the width direction W. A non-bonded area 51 is provided.

When the front region 21 and the rear region 22 are contracted by the contractile force of the stretchable member 30, and the inner sheet 40 is deformed into a bellows shape, the inner sheet 40 becomes non-bonded as shown in FIG. A portion that overlaps with the region 51 in plan view rises from the exterior sheet 20 to form a peak portion 52 . In the front region 21 , a plurality of non-bonded regions 51 are provided in rows in both the longitudinal direction L and the width direction W, so that the peak portions 52 are formed in the longitudinal direction L and the width direction W in the front region 21 . Multiple lines in both directions. In addition, since the plurality of non-adhesive regions 51 are provided in rows only in the width direction W in the rear region 22, a plurality of peaks 52 are formed side by side only in the width direction W in the rear region 22. be done.

Moreover, the lengths in the longitudinal direction L and the width direction W of the non-bonded area 51 can be set arbitrarily. Furthermore, the fixed pitch K1 of the inner sheet 40, which is set by arranging the non-bonded areas 51 at predetermined intervals along the width direction W, is formed in the outer sheet 20 as shown in FIG. It is set to be larger than the forming pitch K2 of the pleats H along the width direction W. The "fixed pitch K1 of the inner sheet 40" is the interval in the width direction W at which the inner sheet 40 is intermittently fixed to the outer sheet 20. It is the interval dimension in the width direction W of the bottoms of the valleys 25 generated between the peaks 52 . Further, the “formation pitch K2 of the folds H” is the interval dimension in the width direction W between the apexes of the folds H formed by the contraction force of the elastic member 30 flexing the exterior sheet 20 .

Further, the inner sheet 40 is formed with cuts 53 at positions overlapping the non-adhesive regions 51 in a plan view. The cut 53 is an elongated opening extending in the width direction W, and at least two cuts 53 are formed side by side in the longitudinal direction L for each non-bonded region 51 . Here, as shown in FIG. 5, the length α in the width direction W of the two cuts 53 formed in each non-bonded region 51 is the same as the length β in the width direction of the non-bonded region 51. length is set. Each cut 53 is formed along edges 51 a and 51 b in the longitudinal direction L of the non-bonded area 51 .

The length α in the width direction W of each cut 53 is set longer than the length β in the width direction of the non-bonded region 51 as in the first modification shown in FIG. may Also, each cut 53 may be arranged inside the edges 51a and 51b in the longitudinal direction L of the non-adhesive region 51, as in the second modification shown in FIG. 6B, for example. Furthermore, two or more cuts 53 (three in the third modification shown in FIG. 6C) may be formed along the longitudinal direction L at positions overlapping the non-bonded regions 51 of the inner sheet 40 .

In the absorbent article 1 of Example 1, as shown in FIG. 5, the inner sheet 40 is embossed at positions overlapping both side portions 51c and 51d of the non-adhesive region 51 in the width direction W in plan view. An embossed portion 54 is formed. Here, the embossed portion 54 has a rectangular shape in plan view. A plurality of embossed portions 54 are formed on both side portions 51c and 51d in the width direction W of the non-adhesive region 51, and are arranged along the longitudinal direction L at predetermined intervals. Further, the embossed portion 54 is not formed in the inner sheet 40 at a position facing the central portion of the non-bonded area 51 in the width direction W in plan view.

Here, a plurality of embossed portions 54 formed at positions overlapping one side portion 51c in the width direction W of the non-bonded region 51 in plan view and the other side portion 51d in the width direction W of the non-bonded region 51 The plurality of embossed portions 54 are formed symmetrically about the center in the width direction of the non-adhesive region 51 . However, the embossed portions 54 formed on both side portions 51c and 51d in the width direction W of the non-bonded region 51 may be asymmetrical. Moreover, the embossed portions 54 may be formed one by one at least at positions overlapping the both side portions 51c and 51d.

Furthermore, in Example 1, an example was shown in which the entire area of the embossed portion 54 was formed at a position overlapping the non-adhesive region 51 of the inner sheet 40 in plan view. However, the embossed portion 54 may be formed across the boundary between the adhesion area 50 and the non-adhesion area 51 . That is, the embossed portion 54 may at least partially overlap both side portions 51c and 51d in the width direction W of the non-bonded region 51 in plan view.

The action of the absorbent article 1 of Example 1 will be described below.

The absorbent article 1 of Example 1 contacts the skin surface of the wearer P at both ends 20a and 20b in the longitudinal direction L of the exterior sheet 20 that stretches in the width direction W, and both ends in the longitudinal direction L of the absorbent member 10 are in contact with each other. An inner sheet 40 is provided to cover the portions 10a and 10b. Here, an adhesive area 50 and a non-adhesive area 51 are provided in the arrangement areas (the front area 21 and the rear area 22 ) in which the inner sheet 40 is arranged on the outer sheet 20 . In addition, the adhesion area 50 is an area where the inner sheet 40 is adhered to the outer sheet 20 . In addition, the non-bonded area 51 is an area where the inner sheet 40 is not bonded to the outer sheet 20, and has a predetermined length in the longitudinal direction L and the width direction W. As shown in FIG. The inner sheet 40 has two cuts 53 extending in the width direction W and aligned in the longitudinal direction L at positions overlapping the non-adhesive regions 51 in plan view.

As a result, as shown in FIG. 7, when the inner sheet 40 is bent integrally with the exterior sheet 20 by the contractile force of the stretchable member 30, the portion overlapping the non-adhesive region 51 is lifted from the exterior sheet 20. A mountain portion 52 is formed. At this time, each cut 53 is opened, and openings 55 are formed on both sides of the peak 52 in the longitudinal direction L, respectively. That is, when the inner sheet 40 is bent by the contractile force of the stretchable member 30 due to the cuts 53 formed in the inner sheet 40, in the absorbent article 1 of Example 1, both sides in the longitudinal direction L are inside the waist portion. An open tunnel structure 56 is formed.

As the tunnel structure 56 is formed, the vapor between the absorbent member 10 and the wearer P flows into the tunnel structure 56 from one opening 55 in the longitudinal direction L, and the other opening 55 in the longitudinal direction L. It flows out of the tunnel structure 56 through the opening 55 . That is, the absorbent article 1 of Example 1 generates air circulation that communicates the inside of the absorbent article 1 with the outside air via the tunnel structure 56, and smoothes the vapor between the absorbent member 10 and the wearer P. can be discharged to the outside of the absorbent article 1 immediately.

In addition, since the tunnel structure 56 has the openings 55 at both ends in the longitudinal direction L, the steam that has flowed into the tunnel structure 56 passes through the openings of the waist (both edges in the longitudinal direction L of the exterior sheet 20) and the wearer. It is discharged to the outside of the absorbent article 1 through between the person P and the absorbent article 1 . Therefore, even if the wearer P is in a supine position and the exterior sheet 20 is covered with bedding or the like, smooth discharge of steam is not hindered.

Moreover, in the absorbent article 1 of Example 1, the contractile force of the stretchable member 30 bends the inner sheet 40 to form the ridges 52 , so that the inner sheet 40 is uneven. Therefore, both sides of the ridges 52 in the width direction W (adhesive regions 50 around the ridges 52) are less likely to adhere to the wearer P, and the adhesion of the inner sheet 40 to the wearer P can be reduced. It is possible to further suppress the stuffiness inside.

In addition, in the absorbent article 1 of Example 1, a plurality of folds H are formed in the width direction W by the contractile force of the elastic member 30 at both ends 10a and 10b of the outer sheet 20 in the longitudinal direction L. As shown in FIG. On the other hand, a plurality of non-bonded regions 51 are provided along the width direction W at predetermined intervals. Therefore, when the inner sheet 40 is bent by the contractile force of the stretchable member 30, the portion of the inner sheet 40 that overlaps the non-bonded area 51 is lifted, forming a plurality of peaks 52 arranged in the width direction W. As shown in FIG. The fixed pitch K1 of the inner sheet 40, which is set by arranging the non-bonded areas 51 at predetermined intervals along the width direction W, is the same as the folds H adjacent to each other in the width direction W formed in the outer sheet 20. is larger than the formation pitch K2.

As a result, the absorbent article 1 of Example 1, as shown in FIG. The shape can be different. Therefore, the tunnel structure 56 formed by the inner sheet 40 does not overlap the folds H formed in the outer sheet 20 . Therefore, in the absorbent article 1, the gap between the inner sheet 40 and the outer sheet 20 can be increased, and the steam between the absorbent member 10 and the wearer P can be more smoothly discharged to the outside of the absorbent article 1. be able to.

In addition, in the absorbent article 1 of Example 1, the length α in the width direction W of the gap 53 is set to the same length as the length β in the width direction of the non-bonded region 51 . As a result, the absorbent article 1 can open both sides in the longitudinal direction L of the ridges 52 over the entire length in the width direction W of the non-bonded region 51 . Therefore, in the absorbent article 1 of Example 1, the opening 55 can be enlarged to form a semi-cylindrical tunnel structure 56, thereby further improving air permeability.

Note that, for example, as in the first modification shown in FIG. 6A, the length α in the width direction W of the cut 53 is set to a length longer than the length β in the width direction of the non-bonded region 51. Even in this case, the absorbent article 1 of Example 1 can enlarge the openings 55 and improve breathability.

Further, in the absorbent article 1 of Example 1, embossed portions 54 are formed at positions overlapping both side portions 51c and 51d in the width direction W of the non-adhesive region 51 of the inner sheet 40 in plan view. As a result, the inner sheet 40 has higher rigidity in the portions overlapping the width direction W side portions 51c and 51d of the non-adhesive region 51 in plan view than in the central portion. Further, when the inner sheet 40 is bent by the contractile force of the elastic member 30, deformation of the portion where the embossed portion 54 is formed is suppressed. Therefore, the portion of the inner sheet 40 that overlaps the central portion in the width direction W of the non-adhesive region 51 can be easily bent, and the tunnel structure 56 can be made less likely to collapse. As a result, the absorbent article 1 of Example 1 can further improve the breathability.

As described above, the absorbent article 1 of the present invention has been described based on Example 1, but the specific configuration is not limited to Example 1, as long as it does not depart from the gist of the invention according to each claim. , design changes and additions are permitted.

In the absorbent article 1 of Example 1, the plurality of non-bonded regions 51 formed in the front region 21 are arranged side by side in the longitudinal direction L with a predetermined interval therebetween. An example in which the two non-bonded regions 51 are aligned in the width direction is shown. However, the arrangement position of the non-adhesion area|region 51 is not restricted to this. For example, two non-adhesive regions 51 adjacent to each other in the longitudinal direction L may be displaced in the width direction W as in an absorbent article 1A of a first modified example shown in FIG. That is, the plurality of non-bonded regions 51 arranged at intervals in the width direction W may be arranged alternately in plan view.

Therefore, in the absorbent article 1A of the first modified example, the tunnel structure 56 can be formed substantially without gaps along the width direction W when viewed along the body of the wearer P, further improving breathability. can be made

In the first embodiment and the first modified example, two rows of the plurality of non-bonded regions 51 arranged at predetermined intervals in the width direction W are arranged in two rows along the longitudinal direction L, or only one row is formed. However, the state of formation of the non-bonded area 51 is not limited to this. The non-bonded regions 51 may be arranged in rows at predetermined intervals in the width direction W, and three or more rows of the non-bonded regions 51 may be formed along the longitudinal direction L. Furthermore, a large number of non-bonded regions 51 may be arranged randomly within the bonded region 50 without forming rows in the width direction W or the longitudinal direction L.

Further, in the absorbent article 1 of Example 1, an example in which the interval between the two non-bonded regions 51 adjacent to each other in the width direction W is constant was shown, but the interval between the non-bonded regions 51 may be good. That is, when a plurality of non-bonded regions 51 are arranged at predetermined intervals along the width direction W like the absorbent article 1B of the second modification shown in FIG. The distance K3 between the two non-bonded regions 51 that match each other may be set to any dimension according to the position where the non-bonded regions 51 are provided.

Thereby, the absorbent article 1B of the second modification can control the arrangement of the tunnel structure 56 . In other words, in the absorbent article 1B of the second modification, for example, the tunnel structure 56 can be densely formed in the waist portion where the body pressure of the wearer P is likely to act, thereby improving the ventilation effect of the portion where the body pressure is likely to be applied. can be made

Furthermore, in the absorbent article 1 of Example 1, the length α in the width direction W of the slit 53 is constant, but the length α may not be constant. That is, like the absorbent article 1C of the third modified example shown in FIG. Any length may be set depending on the position.

Thus, in the absorbent article 1C of the third modified example, the length α of the slit 53 in the width direction W is adjusted according to the difference in the contractile force of the elastic member 30 due to the difference in the position of the non-bonded region 51. can do. Therefore, the absorbent article 1</b>C of the third modification can maintain the shape of the tunnel structure 56 regardless of the contractile force of the elastic member 30 .

In addition, in the absorbent article 1C of the third modified example shown in FIG. 10, an example is shown in which the shape of the non-adhesive region 51 is changed according to the length α of the cut line 53 in the width direction W. As shown in FIG. However, the plurality of non-adhered regions 51 may all be set to have the same size, for example, and only the lengths of the cuts 53 may be different.

Further, in the absorbent article 1 of Example 1, an example was shown in which the entire surface of the back sheet of the absorbent member 10 was adhesively fixed to the exterior sheet 20 . However, the fixed state of the absorbent member 10 to the exterior sheet 20 is not limited to this. For example, in the absorbent article 1D of the fourth modified example shown in FIG. , and non-bonding regions 61 are provided alternately along the width direction W. As shown in FIG. Here, the joint region 60 is a region for fixing the exterior sheet 20 to the absorbent member 10, and is indicated by oblique lines slanted upward to the right in FIG. A non-bonded region 61 is a region where the exterior sheet 20 is not fixed to the absorbent member 10, and is indicated by oblique lines slanted upward to the left in FIG. The joint region 60 has a rectangular shape in plan view having predetermined lengths in the longitudinal direction L and the width direction W. As shown in FIG. Therefore, the non-bonded region 61 has a rectangular shape extending in the longitudinal direction L in plan view.

Further, in the region R1, a plurality of bonding regions 50 where the inner sheet 40 is bonded to the absorbent member 10 and non-bonded regions 51 where the inner sheet 40 is not bonded to the absorbent member 10 are alternately arranged along the width direction W. there is At this time, the non-bonded area 51 has a rectangular shape in plan view having predetermined lengths in the longitudinal direction L and the width direction W. As shown in FIG. Further, the non-adhesive region 51 is provided across the edge of the absorbent member 10 in the longitudinal direction L, and part of it extends closer to the edge of the exterior sheet 20 than the region R1. In the inner sheet 40 , one of the slits 53 provided at a position overlapping each non-bonded region 51 in plan view is arranged at a position overlapping the region R1, that is, a position overlapping the absorbent member 10 . In the inner sheet 40 , one of the cuts 53 provided at a position overlapping each non-bonded region 51 in plan view is arranged at a position not overlapping the region R1, that is, a position not overlapping the absorbent member 10 .

In the region R1, the non-bonded region 51 where the inner sheet 40 is not bonded to the absorbent member 10 overlaps the non-bonded region 61 where the outer sheet 20 is not fixed to the absorbent member 10 in plan view. In the region R1, the widthwise dimension W1 of the non-bonded region 51 is set to be larger than the widthwise dimension W2 of the non-bonded region 61 . That is, the non-bonded region 51 includes the non-bonded region 61 in the width direction W when viewed from above.

In other words, in region R1, the bonding region 50 that bonds the inner sheet 40 to the absorbent member 10 at least partially overlaps the bonding region 60 that fixes the outer sheet 20 to the absorbent member 10 in plan view. In the region R1, the widthwise dimension of the bonding region 50 that bonds the inner sheet 40 to the absorbent member 10 is smaller than the widthwise dimension of the bonding region 60 that fixes the outer sheet 20 to the absorbent member 10 .

As a result, as shown in FIGS. 12 and 13, when the absorbent member 10 is bent by the contractile force of the elastic member 30, the non-bonded regions 61 are lifted from the exterior sheet 20, and the absorbent member 10 aligns the plurality of non-bonded regions 61 in the width direction W. is formed. The second peak portion 62 overlaps the peak portion 52 at least partially formed by the inner sheet 40 in a plan view. Therefore, in the absorbent article 1</b>D of the fourth modification, the second ridges 62 can be arranged inside the tunnel structure 56 formed by the ridges 52 . Therefore, a ventilation tunnel leading to the inside of the absorbent article 1D can be formed, and steam between the absorbent member 10 and the wearer P can be smoothly discharged to the outside of the absorbent article 1D.

Further, in Example 1, an example in which the through-holes are not formed in the outer sheet 20 was shown, but as in the absorbent article 1E of the fifth modified example shown in FIG. 70 may be formed. Here, the through-holes 70 are provided in regions that overlap both ends 10a and 10b in the longitudinal direction L of the absorbent member 10 in plan view.

As a result, it is possible to secure a ventilation path that passes through the exterior sheet 20 and communicates the space between the absorbent member 10 and the wearer P with the outside air. Therefore, the absorbent article 1</b>E of the fifth modification can more smoothly discharge steam between the absorbent member 10 and the wearer P to the outside of the absorbent article 1 .

Further, the absorbent article 1 of Example 1 includes a plurality of thread-like elastic members 31 in which the stretchable members 30 are arranged in openings of the waist portion, and net-like elastic members arranged in the front region 21 and the rear region 22, respectively. An example with a sheet 32 and . However, since the stretchable member 30 only needs to stretch the ends 10a and 10b of the exterior sheet 20 in the longitudinal direction L in the width direction W, the stretchable member 30 may be composed only of a large number of thread-like elastic members 31, for example.

In addition, in the absorbent article 1 of Example 1, the inner sheet 40 is provided at both ends 20a and 20b in the longitudinal direction L of the outer sheet 20, and the plurality of tunnel structures 56 are provided in both the front region 21 and the rear region 22. An example of the formation of . However, the tunnel structure 56 may be formed in at least one of the front region 21 and the rear region 22 . Furthermore, the tunnel structure 56 does not have to be formed in plural, and at least one or more may be formed.

Further, in the absorbent article 1 of Example 1, an example is shown in which the inner sheet 40 is arranged so as to cover the entire surface of the front region 21 and the rear region 22 of the outer sheet 20 . However, the inner sheet 40 does not necessarily have to cover the entire surface of the front region 21 and the rear region 22 . The inner sheet 40 may cover at least the ends in the longitudinal direction L of the absorbent member 10 and be provided in the region of the exterior sheet 20 that expands and contracts in the width direction W. As shown in FIG.

Although the absorbent article 1 of Example 1 is a disposable underpants type paper diaper, the absorbent article of the present invention is not limited to this. For example, the absorbent article of the present invention may be a tape-fastening type disposable diaper.

1 Absorbent Article 10 Absorbent Member 10a, 10b End 20 Exterior Sheet 20a, 20b End 21 Front Area 22 Rear Area 24 Outermost Exterior Sheet 25 Valley 30 Elastic Member 31 Thread-like Elastic Member 32 Elastic Sheet 40 Inner Sheet 50 Adhesion Area 51 non-adhesive region 52 crest 53 cut 54 embossed portion 55 opening 56 tunnel structure H fold L longitudinal direction W width direction

Claims (9)

an absorbent member that absorbs bodily fluids of the wearer; and an exterior sheet that covers the non-skin surface of the absorbent member and extends in the longitudinal direction from the abdominal side of the wearer to the dorsal side through the groin, wherein the exterior An absorbent article in which the ends of the sheet in the longitudinal direction are stretchable in a width direction orthogonal to the longitudinal direction,
An inner sheet is provided at the end of the outer sheet in the longitudinal direction and is in contact with the wearer and covers the end of the absorbent member in the longitudinal direction,
The arrangement area in which the inner sheet is arranged on the outer sheet includes an adhesion area for bonding the inner sheet to the outer sheet, and a predetermined length in the longitudinal direction and the width direction. A non-adhesive area that does not adhere to the exterior sheet is provided,
The absorbent article, wherein the inner sheet has at least two cuts extending in the width direction and aligned in the longitudinal direction at positions overlapping the non-adhesive regions. In the absorbent article according to claim 1,
The outer sheet has a plurality of folds arranged in the width direction at the ends in the longitudinal direction,
A plurality of the non-bonded regions are provided at predetermined intervals along the width direction,
The fixed pitch for fixing the inner sheet to the outer sheet, which is set by providing a plurality of the non-adhesive regions at predetermined intervals along the width direction, is the formation of the folds along the width direction. An absorbent article characterized by being larger than the pitch. In the absorbent article according to claim 1 or claim 2,
The length of the cut in the width direction is set to the same length as the length in the width direction of the non-bonded region or a length longer than the length in the width direction of the non-bonded region. Goods. In the absorbent article according to any one of claims 1 to 3,
The absorbent article, wherein the inner sheet is provided with embossed portions at positions overlapping both sides of the non-adhesive region in plan view. In the absorbent article according to any one of claims 1 to 4,
A plurality of the non-bonded regions are provided at predetermined intervals along both the longitudinal direction and the width direction,
The absorbent article, wherein the two non-adhesive regions adjacent in the longitudinal direction are arranged with the positions shifted in the width direction. In the absorbent article according to any one of claims 1 to 5,
A plurality of the non-bonded regions are provided at predetermined intervals along the width direction,
The absorbent article, wherein an interval between the non-adhesive regions adjacent to each other in the width direction is set according to positions where the non-adhesive regions are formed. In the absorbent article according to any one of claims 1 to 6,
A plurality of the non-bonded regions are provided at predetermined intervals along the width direction,
The absorbent article, wherein the length of the cut in the width direction is set according to the position where the non-bonded region is formed. In the absorbent article according to any one of claims 1 to 7,
In the area where the absorbent member is sandwiched between the exterior sheet and the inner sheet, there are a bonded area where the exterior sheet is fixed to the absorbent member and a non-bonded area where the exterior sheet is not fixed to the absorbent member. , provided alternately along the width direction,
Adhesive regions where the inner sheet is adhered to the absorbent member and non-adhered regions where the inner sheet is not adhered to the absorbent member are provided alternately along the width direction,
At least part of the non-bonded region overlaps the non-bonded region in a plan view,
The non-adhesive region is provided across the longitudinal edge of the absorbent member, and at least one of the cuts provided at a position overlapping the non-adhesive region of the inner sheet overlaps the absorbent member. and at least one of the slits is arranged at a position not overlapping the absorbent member. In the absorbent article according to any one of claims 1 to 8,
The absorbent article, wherein the outer sheet has a through-hole formed in a region overlapping with the absorbent member.