JP7025501B1 - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sweat absorbed by a sweat absorbing sheet from returning to the skin side while providing a sweat absorbing sheet which easily absorbs sweat. SOLUTION: The skin side sheet, the non-skin side sheets 4 and 5, the absorbent core 21, the elastic sheet 8 provided between the skin side sheet and the non-skin side sheet in the thickness direction, and the thickness. A pair of sweat-absorbing sheet 9A provided on the outer side in the vertical direction from the absorbent core 21 between the skin-side sheet and the elastic sheet in the direction, and a pair provided on the skin side of the sweat-absorbent sheet, which has lower liquid permeability than the skin-side sheet. An absorbent article 1 including the three-dimensional gather portion 6 of the above, which is sandwiched between a pair of three-dimensional gather portions and has a central region X in which a sweat-absorbing sheet and an elastic sheet overlap, and a three-dimensional gather portion and a sweat-absorbing sheet. The gathered region has a gathered region Y on which the stretchable sheet overlaps, and a low elongation portion lower than the lateral stretching force of the central region. [Selection diagram] Fig. 1

Description

The present invention relates to an absorbent article.

Conventionally, as in Patent Document 1, it is known that an absorbent sheet such as a disposable diaper is provided with an absorbent sheet to absorb the sweat of the wearer. In the disposable diaper described in Patent Document 1, the elastic waist elastic member is sandwiched and fixed between the sweat absorbing sheet and the top sheet, and the back side of the diaper is attached by the contraction of the elastic waist elastic member. It fits the body.

Japanese Unexamined Patent Publication No. 2012-228594

In the disposable diaper of Patent Document 1, the contraction of the elastic elastic member at the waist brings the sweat-absorbing sheet closer to the wearer's skin, making it easier to absorb sweat, while the sweat-absorbing sheet in the state of absorbing sweat is elastic at the waist. If the elastic member continues to be pressed against the skin due to contraction, sweat may return from the sweat absorbing sheet to the skin side.

The present invention has been made in view of the above problems, and an object thereof is to provide a sweat-absorbing sheet that easily absorbs sweat, and the sweat absorbed by the sweat-absorbing sheet returns to the skin side. It is to reduce fear.

The main invention for achieving the above object has a vertical direction, a horizontal direction, and a thickness direction orthogonal to each other, and the skin side sheet, the non-skin side sheet, and the skin side sheet in the thickness direction. An absorbent core provided between the non-skin side sheet and an elastic sheet provided between the skin side sheet and the non-skin side sheet in the thickness direction and stretchable in the lateral direction. In the thickness direction, between the skin-side sheet and the elastic sheet, the sweat-absorbing sheet provided on the outer side in the vertical direction from the absorbent core and the skin-side sheet have lower liquid permeability than the skin-side sheet. An absorbent article provided on the skin side of the sweat-absorbing sheet and having a pair of three-dimensional gathered portions that can stand up on the skin side by the elastic member for the three-dimensional gathered portion that expands and contracts in the vertical direction. It has a central region sandwiched between the pair of the three-dimensional gathered portions and where the sweat-absorbing sheet and the elastic sheet overlap, and a gathered region where the three-dimensional gathered portion, the sweat-absorbing sheet and the elastic sheet overlap. When the force required to extend the central region by the unit length in the lateral direction is taken as the central extension force, the force required to extend the gathered region by the unit length in the lateral direction is said. It is an absorbent article characterized by having a low elongation portion smaller than the central elongation force.
Other features of the present invention will be clarified by the description in the present specification and the accompanying drawings.

According to the present invention, it is possible to reduce the risk that the sweat absorbed by the sweat-absorbing sheet returns to the skin side while providing the sweat-absorbing sheet that easily absorbs sweat.

FIG. 1 is a plan view of the diaper 1 of the present embodiment as viewed from the skin side in the unfolded state and the stretched state. FIG. 2A is a schematic diagram illustrating the configuration of the cross section in AA in FIG. 1. FIG. 2A is a schematic diagram illustrating the configuration of a cross section at the center line CL in FIG. FIG. 2C is a schematic diagram illustrating the configuration of the cross section in BB in FIG. 1. FIG. 3 is a diagram illustrating arrangements on the telescopic sheet 8 and the sweat absorbing sheets 9A and 9B. FIG. 4 is an enlarged view of one side in the lateral direction of FIG. 2A.

The description of this specification and the accompanying drawings will clarify at least the following matters.
It has a vertical direction, a horizontal direction, and a thickness direction orthogonal to each other, and is provided between the skin side sheet, the non-skin side sheet, and the skin side sheet and the non-skin side sheet in the thickness direction. An elastic core provided between the skin-side sheet and the non-skin-side sheet in the thickness direction, and a stretchable sheet that can be expanded and contracted in the lateral direction, and the skin-side sheet in the thickness direction. The sweat-absorbing sheet provided on the outer side in the vertical direction from the absorbent core and the skin-side sheet having lower liquid permeability than the skin-side sheet and provided on the skin side of the sweat-absorbing sheet are provided between the elastic sheet and the elastic sheet. An absorbent article having a pair of three-dimensional gather portions that can stand upright on the skin side by an elastic member for the three-dimensional gather portion that expands and contracts in the direction, and is sandwiched between the pair of three-dimensional gather portions in a deployed state and in a plan view. A central region where the sweat-absorbing sheet and the stretchable sheet overlap, and a gathered region where the three-dimensional gathered portion, the sweat-absorbing sheet, and the stretchable sheet overlap each other, and the central region has a unit length in the lateral direction. When the force required for the central extension force is taken as the central extension force, the gathered region has a low extension portion in which the force required for the lateral extension by a unit length is smaller than the central extension force. It is an absorbent article characterized by this.

According to such an absorbent article, in the central area, the shrinkage of the elastic sheet makes it easier to bring the sweat-absorbing sheet closer to the skin, and at the same time, makes it easier to form irregularities on the surface of the sweat-absorbing sheet, so that the wearer touches the skin. By reducing the area, the liquid holding capacity per unit area of the sweat absorbing sheet is increased, and it becomes easier to absorb sweat. In addition, even when the sweat-absorbing sheet absorbs a large amount of sweat, in the gathered area, the three-dimensional gathered portion provided on the skin side of the sweat-absorbing sheet, which has lower liquid permeability, tends to prevent the sweat of the sweat-absorbing sheet from returning to the skin side. At the same time, since the gathered region has a weaker force to bring the sweat-absorbing sheet closer to the skin side due to the low elongation portion, it is possible to reduce the possibility that the sweat absorbed by the sweat-absorbing sheet returns to the skin side.

It is desirable that the absorbable article is a portion in which the low elongation portion does not extend.

According to such an absorbent article, since the sweat-absorbing sheet has a portion where the force of bringing the sweat-absorbing sheet close to the skin does not work, it is possible to reduce the return of the sweat absorbed by the sweat-absorbing sheet to the skin side.

In such an absorbent article, a joint portion where the skin-side sheet and the sweat-absorbent sheet are joined between the skin-side sheet and the sweat-absorbent sheet adjacent to each other in the thickness direction, the skin-side sheet and the sweat-absorbent sheet, and the like. It is desirable to have a non-joint portion that is not joined to the sweat-absorbing sheet.

According to such an absorbent article, a separated portion can be provided between the skin-side sheet and the sweat-absorbing sheet, and the sweat absorbed by the sweat-absorbing sheet is less likely to return to the skin-side sheet.

It is desirable that the low-elongation portion is a non-elongable portion of the absorbent article, and the low-elongation portion and the non-joint portion overlap each other in the plan view.

According to such an absorbent article, a portion separated between the skin-side sheet and the sweat-absorbing sheet can be provided in a portion where the force for bringing the sweat-absorbing sheet closer to the skin does not work, so that the sweat absorbed by the sweat-absorbing sheet can be absorbed by the skin. It becomes difficult to return to the side.

It is desirable that the sweat-absorbing sheet has a portion that does not overlap with the stretchable sheet in the plan view of the absorbent article.

According to such an absorbent article, in a plan view, the part of the sweat-absorbing sheet that does not overlap with the elastic sheet is a part that is difficult to be brought close to the skin side by the elastic sheet, so that the sweat absorbed by the sweat-absorbing sheet returns to the skin side. It can be made difficult.

In such an absorbent article, it is desirable that the sweat-absorbing sheet does not overlap with the absorbent core in the plan view.

According to such an absorbent article, it is possible to prevent the excrement absorbed by the absorbent core from being transferred to the sweat-absorbing sheet and returning from the sweat-absorbing sheet to the skin side.

The absorbent article has a first waist circumference portion, a second waist circumference portion, and a crotch portion provided between the first waist circumference portion and the second waist circumference portion, and the first waist circumference portion. However, the first sweat-absorbing sheet and the telescopic sheet are provided, the second waistline portion is provided with the second sweat-absorbing sheet, and the gathered area is the three-dimensional gathered portion, the first sweat-absorbing sheet, and the stretchable portion in the plan view. The sheet overlaps, and the three-dimensional gather portion and the second sweat-absorbing sheet overlap each other, and in the central region, the first sweat-absorbing sheet and the telescopic sheet overlap each other in the plan view. It is desirable that the gathered region in the first waist circumference portion has the low extension portion.

According to such an absorbent article, the sweat is easily absorbed in the central region of the first waist circumference portion, and the sweat returns from the sweat absorbing sheet to the skin side in the gathered region of the first waist circumference portion is reduced. Even in the second waistline portion without the elastic sheet, the gathered area is provided on the skin side of the second sweat absorbing sheet, and the three-dimensional gathered portion having lower liquid permeability makes it difficult for the sweat held by the second sweat absorbing sheet to return to the skin side. ..

The absorbent article is a deployable disposable diaper, which is provided between the ventral waist circumference portion, the dorsal waist circumference portion, and the ventral waist circumference portion and the dorsal waist circumference portion. The elastic sheet is a dorsal elastic sheet arranged in the dorsal waist circumference portion, and the sweat absorbing sheet is a dorsal sweat absorbing sheet arranged in the dorsal waist circumference portion. Is desirable.

Generally, when a wearer lying on his back is to wear a deployable disposable diaper, the dorsal waistline is inserted by inserting the dorsal waistline under the wearer's back. By covering the wearer's back and subsequently arranging the lower crotch and ventral waist circumference so as to cover the wearer's inseam and abdomen, the wearer is in a wearing state. According to such an absorbent article, the dorsal waist circumference portion is provided with the dorsal elastic sheet and the dorsal sweat-absorbing sheet, so that the rigidity is higher than that in the case where the dorsal elastic sheet and the dorsal sweat-absorbing sheet are not provided. When worn, it is easier to insert it under the wearer's back.

The absorbent article has a pair of fold lines along the vertical direction, and the pair of fold lines has the skin on both side ends in the horizontal direction along the vertical direction in the packaged state. It is a fold line for folding with the side inside, and in the lateral direction, one side end of the dorsal sweat-absorbing sheet is provided outside the fold line on one side, and the other side of the dorsal sweat-absorbing sheet is provided. It is desirable that the side end on the side is provided outside the folding line on the other side.

According to such absorbent articles, when a wearer lying on his back wears a deployable disposable diaper, the dorsal girth is placed under the wearer's back with a pair of fold lines unfolded. By providing the dorsal sweat-absorbing sheet so as to straddle the pair of fold lines, the rigidity of the dorsal sweat-absorbing sheet makes it easier to maintain the pair of fold lines unfolded under the wearer's back. It will be easier to insert it to the side.

In such an absorbent article, it is desirable that the fiber density of the dorsal sweat-absorbing sheet is higher than the fiber density of the absorbent core.

According to such an absorbent article, the rigidity of the dorsal sweat-absorbing sheet can be increased as compared with the case where the fiber density of the dorsal sweat-absorbing sheet is lower than the fiber density of the absorbent core. , When worn, it becomes easier to insert it under the wearer's back.

It is desirable that the ventral waistline portion of the absorbent article has a ventral sweat-absorbing sheet, and the three-dimensional gathered portion and the ventral sweat-absorbing sheet overlap each other in the plan view.

According to such an absorbent article, it is possible to absorb sweat not only in the dorsal waist circumference but also in the ventral waist circumference, and in a plan view, the three-dimensional gathered portion and the ventral sweat absorbing sheet overlap with each other to cause the abdomen. It is possible to prevent the sweat absorbed by the side sweat absorbing sheet from returning to the skin side. Further, when such an absorbent article is worn, the ventral waist circumference is provided with the ventral sweat-absorbing sheet, so that the rigidity of the ventral waist circumference is increased, and the abdomen of the ventral waist circumference caused by the wearer's movement is increased. It is possible to reduce the bending of the side end and the twist of the ventral end of the ventral waist circumference.

In such an absorbent article, it is desirable that the length of the ventral sweat-absorbing sheet in the vertical direction is shorter than the length of the dorsal sweat-absorbing sheet in the vertical direction.

According to such an absorbent article, the ventral sweat-absorbing sheet and the dorsal sweat-absorbing sheet absorb the sweat of the abdomen and the back, while the vertical length of the dorsal sweat-absorbing sheet is the vertical length of the ventral sweat-absorbing sheet. The dorsal waistline is more rigid due to the dorsal sweat-absorbing sheet than if the length in the direction is shorter, and it is easier to insert it under the wearer's back when the wearer is lying on his back. In addition, the rigidity of the ventral waist circumference is lower than when the vertical length of the ventral sweat-absorbing sheet is longer than the vertical length of the dorsal sweat-absorbing sheet, and the feel of the ventral waist circumference when worn is improved. It will be easier to make.

In the unfolded state, the ventral sweat-absorbing sheet is provided outside the ventral end of the absorbent core, and the dorsal sweat-absorbing sheet is the absorbent. Provided outside the dorsal end of the core, the distance between the ventral end of the absorbent core and the dorsal end of the ventral sweat-absorbing sheet is the dorsal end of the absorbent core and the dorsal end. It is desirable that it is shorter than the distance from the ventral edge of the sweat absorbing sheet.

According to such an absorbent article, the absorbent core is arranged longer on the ventral side while preventing the excrement absorbed by the absorbent core from transferring to the sweat-absorbing sheet and returning from the sweat-absorbing sheet to the skin side. Therefore, excrement such as urine excreted toward the front side can be absorbed, so that the sweat-absorbing sheet can absorb the wearer's sweat while preventing the excrement from leaking from the absorbent article. ..

In such an absorbent article, the dorsal girth portion is provided with a fastening tape provided at the lateral end portion, and the non-skin side surface of the ventral girth portion is a target capable of engaging with the fastening tape. It is desirable that the member is provided, the ventral waistline portion has a ventral sweat-absorbing sheet, and the target member has a portion overlapping the ventral sweat-absorbing sheet in the plan view.

According to such an absorbent article, the rigidity of the target member can be increased, so that the target member can be easily kept flat and the fastening tape can be easily locked to the target member.

In the absorbent article, the ventral sweat-absorbing sheet and the absorbent core are separated from each other in the vertical direction, and the target member is a portion where the ventral sweat-absorbing sheet and the absorbent core are separated from each other. It is desirable that it is provided across.

According to such an absorbent article, by providing the target member between the ventral sweat absorbing sheet and the absorbent core which are vertically separated from each other, it is possible to alleviate the difference in rigidity of the separated portions. , It is possible to reduce the deformation of the ventral waist circumference.

In such an absorbent article, in the vertical direction, the outer end of the ventral sweat-absorbing sheet is at the same position as the end of the ventral waistline portion, and the outer end of the dorsal sweat-absorbing sheet is the dorsal. It is desirable that it is in the same position as the end of the side waist circumference.

According to such an absorbent article, the outer end of the ventral sweat-absorbing sheet is provided inside the end of the ventral waistline and the outer end of the dorsal sweat-absorbing sheet is provided inside the end of the dorsal waistline. Also, since the ventral sweat-absorbing sheet and the dorsal sweat-absorbing sheet can be arranged in a wider range, more sweat can be absorbed.

In such an absorbent article, it is desirable that the color of the sweat-absorbing sheet is different from the color of the skin-side sheet, the absorbent core, the elastic sheet, and the three-dimensional gathered portion.

According to such an absorbent article, the absorbent article makes it easy for the wearer or the person who intends to wear the product to recognize that the sweat-absorbing sheet is provided.

=== This embodiment ===
Hereinafter, as an example of the absorbent article, a so-called tape type (open type) deployable disposable diaper 1 (hereinafter, also simply referred to as “diaper 1”) will be described as an example. However, the diaper 1 according to the present invention can also be used as an absorbent article such as pants-type disposable diapers and sanitary shorts.

<<< About the configuration of disposable diaper 1 >>>
FIG. 1 is a plan view of the diaper 1 of the present embodiment as viewed from the skin side in the unfolded state and the stretched state. 2A is a schematic view illustrating the configuration of the cross section in AA in FIG. 1, FIG. 2A is a schematic diagram illustrating the configuration of the cross section in the center line CL in FIG. 1, and FIG. 2C is a schematic diagram in FIG. It is a schematic diagram explaining the structure of the cross section in BB. The unfolded state of the diaper 1 means a state in which the entire diaper 1 is unfolded in a plane. The stretched state of the diaper 1 is a state in which the wrinkles generated in the diaper 1 are stretched so as to be substantially invisible, and the dimensions of each member constituting the diaper 1 (for example, the skin-side sheet 3 described later). Is a state in which the diaper 1 is stretched until the length of the member is equal to or close to the size of the single member. In the following description, the diaper 1 in the expanded state and the extended state of FIG. 1 will be described, but the diaper 1 is not necessarily in the extended state and may be in the natural state. 2A, 2B, and 2C show a cross section of each portion in FIG. 1, and for convenience, a part of the visible portion on the ventral side in the vertical direction from the cross section is omitted.

The diaper 1 has a vertical direction, a horizontal direction, and a thickness direction orthogonal to each other in the expanded and extended state shown in FIG. It has a side waist circumference portion 1B side by side. The vertical direction is also referred to as a "longitudinal direction". The thickness direction is the direction in which the members constituting the diaper 1 are laminated, and the side in contact with the wearer is referred to as the "skin side" and the opposite side is referred to as the "non-skin side". As shown in FIG. 1 and the like, the diaper 1 has a symmetrical shape. In FIG. 1 and the like, the center line CC is the center in the horizontal direction, and the center line CL is the center in the vertical direction.

In the diaper 1, the dorsal waist circumference 1A (first waist circumference) is a dorsal member that covers the back side of the wearer, and the ventral waist circumference 1B (second waist circumference) covers the wearer's ventral side. It is a ventral member, and the inseam 1C is a member arranged in the inseam of the wearer. In the present embodiment, as shown in FIG. 1, the dorsal waist circumference portion 1A is a portion including the widest region on the dorsal side of the center line CL. The ventral waist circumference portion 1B is a portion including the widest region on the ventral side of the vertical center line CL. The inseam 1C is located between the dorsal waist circumference 1A and the ventral waist circumference 1B in the vertical direction, has a shorter lateral length than the widest portion of the dorsal waist circumference 1A, and has a ventral waist circumference 1B. The part whose lateral length is shorter than the widest part.

The diaper 1 has an absorber 2 that absorbs excrement such as urine, a liquid-permeable skin-side sheet 3 that covers the absorber 2 from the skin side, and a liquid-impermeable prevention that covers the absorber 2 from the non-skin side. A pair of three-dimensional gathered portions 6 provided laterally side by side on the leak-proof sheet 4, the exterior sheet 5 that covers the leak-proof sheet 4 from the non-skin side to form the outer shape of the urine 1, and the skin-side sheet 3. It has a fastening tape 10 and a target member 15. Each member is joined in A1 to A9 by an adhesive means such as a hot melt adhesive.

Fastening tape 10 is fixed at each lateral end of the dorsal waist circumference 1A by an adhesive region A7. The fastening tape 10 has a locking portion 11. The fastening tape 10 is, for example, a member of a non-woven fabric, and extends in the lateral direction. The locking portion 11 (for example, the male member of the hook-and-loop fastener) is fixed to the skin side surface of the portion of the fastening tape 10 extending laterally outward from the dorsal waist circumference portion 1A by the adhesive region A8.

Further, the target member 15 is a target tape with which the locking portion 11 is engaged. A target member 15 for locking the locking portion 11 is provided on the non-skin side surface of the lateral central portion of the ventral waist circumference portion 1B. The target member 15 has a substantially rectangular shape, is formed of, for example, a non-woven fabric, and is joined and fixed to the exterior sheet 5 at the adhesive region A9. A part of the target member 15 overlaps with the absorber 2 in a plan view.

Approximately the center in the vertical direction (around the center line CL) while applying the unfolded diaper 1 to the wearer in order to put the diaper 1 in the wearing state, that is, to put the diaper 1 in the wearing state. Fold it in half and fold the pair of dorsal waist circumferences 1A on the dorsal waist circumference 1A side inward at the lateral ends. Then, the locking portion 11 of the fastening tape 10 is locked to the target member 15 on the non-skin side surface of the ventral waist circumference portion 1B. However, the fastening tape 10 and the target member 15 are not limited to this, and for example, the locking portion 11 can be directly locked to the exterior sheet 5 of the ventral waist circumference portion 1B without providing the target member 15, or the locking portion. An adhesive tape may be provided on the fastening tape 10 instead of the 11.

As the skin side sheet 3, it has a first skin side sheet 31 and a second skin side sheet 32. The first skin side sheet 31 and the second skin side sheet 32 can exemplify sheet members such as air-through nonwoven fabrics such as air-through nonwoven fabrics and spunbonded nonwoven fabrics, respectively. The first skin-side sheet 31 is provided on the skin side of the second skin-side sheet 32, and the length in the vertical direction is substantially the same as the length in the longitudinal direction of the diaper 1, and a pair of three-dimensional gather portions in the horizontal direction. It is provided between 6. Since the first skin side sheet 31 is the portion most in contact with the wearer's skin, a material that is softer and softer than the second skin side sheet 32 is preferable. The second skin-side sheet 32 is adjacent to the first skin-side sheet in the thickness direction and is bonded at the adhesive region A1. The length of the second skin-side sheet 32 in the vertical direction is substantially the same as the length in the longitudinal direction of the diaper 1, and is longer in the horizontal direction than the length of the first skin-side sheet 31 and the length of the absorber 2. ..

The leak-proof sheet 4 and the exterior sheet 5 are non-skin side sheets provided on the non-skin side of the absorber 2. The leak-proof sheet 4 is joined to the second skin-side sheet 32 and the absorber 2 via the adhesive region A4, and a part of the leak-proof sheet 4 is a dorsal sweat-absorbing sheet 9A, a ventral sweat-absorbing sheet 9B, and expansion / contraction. Both the sheet 8 and the sheet 8 are fixed by the adhesive region A4. The exterior sheet 5 is bonded to the leak-proof sheet 4 via the adhesive region A6, and is bonded to the three-dimensional gather portion 6 via the adhesive region A5. A part of the exterior sheet 5 is also bonded to the fastening tape 10 in the adhesive region A5. It is fixed at. As the leak-proof sheet 4, a sheet member such as a resin film such as a polyethylene film can be exemplified, and as the exterior sheet 5, a flexible sheet member such as an SMS non-woven fabric (spun bond / melt blown / spun bond non-woven fabric) can be exemplified.

The absorber 2 has a vertically long rectangular shape arranged over the dorsal waist circumference 1A, the inseam 1C, and the ventral waist circumference 1B. The absorber 2 has an absorbent core 21 having a predetermined shape for absorbing excrement such as urine, and a liquid-permeable core wrap sheet 22 that covers the absorbent core 21 from both the skin side and the non-skin side in the thickness direction, respectively. And have. Examples of suitable materials for the core wrap sheet 22 include tissue paper and non-woven fabric. However, these core wrap sheets 22 are not essential configurations.

The absorbent core 21 has a substantially hourglass shape in a plan view as an example of a predetermined shape. As the liquid absorbent material constituting the absorbent core 21, for example, a liquid absorbent fiber such as pulp fiber or a liquid absorbent granular material such as a highly absorbent polymer (so-called SAP) can be used. Further, it may contain a liquid-absorbing material other than the liquid-absorbing fiber and the liquid-absorbing granules.

The pair of three-dimensional gather portions 6 is a pair of an elastic member 61 for the three-dimensional gather portion (for example, thread rubber) that expands and contracts in the vertical direction, and a pair of fixing the three-dimensional gather portion 6 to the second skin side sheet 32 (skin side sheet 3). A fixed portion of 6 m is provided. The elastic member 61 for the three-dimensional gather portion can be exemplified by a thread rubber, and is fixed to the three-dimensional gather portion 6 with a hot melt adhesive or the like in a state of being stretched in the vertical direction. The fixing portion 6m is a portion for fixing the three-dimensional gather portion 6 to the diaper 1, and the three-dimensional gather portion 6 is fixed to the diaper 1 by ultrasonic bonding or bonding with an adhesive such as a hot melt adhesive. Each of the pair of fixing portions 6m has a shape along the vertical direction of the pair of three-dimensional gather portions 6, and the dorsal end portion and the ventral end portion in the vertical direction are fixed wider than the central portion. .. In the central portion of the three-dimensional gather portion 6 in the vertical direction, the region from the inner end in the horizontal direction to the portion where the fixed portion 6 m is provided is the upright portion 6s where the fixed portion 6 m is not provided. The upright portion 6s can stand up on the skin side due to the contraction of the elastic member 61 for the three-dimensional gather portion, and becomes a leakage-proof wall. By providing the three-dimensional gather portion 6, the risk of excrement leaking from the lateral direction of the diaper 1 is reduced.

A pair of elastic members 7 (for example, rubber threads) that can be expanded and contracted in the vertical direction are provided on both sides of the diaper 1 in the lateral direction, mainly at the position of the inseam 1C, along the leg circumference of the wearer. Has been done. Specifically, as shown in FIG. 1, the leg rotation elastic member 7 is provided on the lateral side of the elastic member 61 for the three-dimensional gather portion in the expanded and extended state. The leg circumference elastic member 7 is fixed to the non-skin side surface of the three-dimensional gather portion 6 in a vertically extended state. As a result, in the wearing state, each lateral side portion of the diaper 1 fits around the wearer's leg, and leakage of excrement is suppressed.

The number, shape, material, and the like of the elastic member 61 for the three-dimensional gather portion and the elastic member 7 around the leg are not limited to those shown in FIG. For example, the number of elastic members 61 for the three-dimensional gather portion and the number of elastic members 7 around the legs can be arbitrarily set, and a thread-like polyurethane elastic fiber or a thermoplastic elastomer resin is melted into a film-like elastic film. It may be an elastic non-woven fabric made of elastic fibers.

The dorsal waist circumference portion 1A includes a telescopic sheet 8 and a dorsal sweat absorbing sheet 9A. On the other hand, the ventral waist circumference portion 1B does not include an elastic sheet that expands and contracts in the lateral direction, but includes a ventral sweat absorbing sheet 9B.

The elastic sheet 8 is provided between the skin side sheet 3 (first skin side sheet 31, second skin side sheet 32) and the non-skin side sheet (leakage-proof sheet 4, exterior sheet 5). Specifically, it is above the dorsal absorbent core 21 in the vertical direction, inside the fastening tape 10 in the horizontal direction, and at the center of the diaper 1, and in the thickness direction, the dorsal sweat-absorbing sheet 9A and the protective material are prevented. It is provided between the leak sheet 4 and the dorsal sweat absorbing sheet 9A is fixed in the adhesive region A3. Further, the telescopic sheet 8 has a portion that overlaps with the three-dimensional gather portion 6 in a plan view. The telescopic sheet 8 is a sheet-shaped telescopic member having a substantially rectangular shape, the length in the vertical direction is shorter than the length in the vertical direction of the fastening tape 10, and the length in the horizontal direction is the length in the horizontal direction of the absorber 2. Longer than that. The elastic sheet 8 is a sheet-shaped urethane material having elasticity that can be expanded and contracted in the lateral direction, and is a portion that becomes a so-called waist gather when worn. The contraction of the elastic sheet 8 fits the dorsal waist circumference 1A to the wearer's skin, reducing the risk of excrement leaking from the dorsal side. The stretchable sheet 8 is not limited to the urethane material, and a stretchable film formed by melting a thermoplastic elastomer resin into a film or a non-woven fabric sheet having elasticity made of stretchable fibers may be used. It may be an elastic sheet formed by laminating rubber.

The dorsal sweat absorbing sheet 9A is provided at the dorsal end portion in the vertical direction (the end portion on the dorsal waist circumference portion 1A side in the vertical direction). The dorsal sweat-absorbing sheet 9A is located inside the fastening tape 10 in the horizontal direction, at the center of the diaper 1, outside the absorber 2 in the vertical direction, and on the skin side sheet 3 (first skin) in the thickness direction. It is provided between the side sheet 31, the second skin side sheet 32) and the telescopic sheet 8. Further, in a plan view, it has a portion that overlaps the three-dimensional gather portion 6 and the telescopic sheet 8. Specifically, it is fixed in the adhesive region A2 between the second skin side sheet 32 and the adhesive region A3 between the elastic sheet. The dorsal sweat-absorbing sheet 9A is a sheet that easily absorbs sweat, and is a sheet containing hydrophilic fibers (water-absorbing fibers). Specifically, a dorsal sweat-absorbing sheet 9A having a skin-side layer mainly composed of hydrophobic fibers and containing a small amount of hydrophilic fibers and a non-skin-side layer mainly composed of hydrophilic fibers can be exemplified. The dorsal sweat-absorbing sheet 9A absorbs sweat with the hydrophilic fibers of the skin-side layer, and while the sweat permeates and diffuses into the non-skin-side layer, the hydrophobic fibers of the skin-side layer make it easier to retain the absorbed sweat. ..

The dorsal sweat-absorbing sheet 9A is preferably different in color from the skin-side sheet 3 (first skin-side sheet 31, second skin-side sheet 32), the absorbent core 21, the elastic sheet 8, and the three-dimensional gathered portion 6. In the diaper 1, the colors of the first skin side sheet 31, the second skin side sheet 32, the absorber 2 (absorbent core 21 and the core wrap sheet 22), the elastic sheet 8, and the three-dimensional gather portion 6 are white, respectively. The dorsal sweat absorbing sheet 9A is green. This makes it easier for the wearer and the person who intends to wear the diaper 1 to recognize that the dorsal sweat absorbing sheet 9A is provided as a member for absorbing sweat. The "different color" means that the color of the dorsal sweat-absorbing sheet 9A deviates from the color of the skin-side sheet 3 or the like by two or more hues in the Ostwald color wheel.

The ventral sweat absorbing sheet 9B is provided at the ventral end in the vertical direction (the end on the ventral waist circumference 1B side in the vertical direction). The ventral sweat-absorbing sheet 9B is the central portion of the diaper 1 in the lateral direction, outside the absorber 2 in the vertical direction, and the skin-side sheet 3 (first skin-side sheet 31, second skin-side sheet 32) in the thickness direction. ) And the telescopic sheet 8. Further, in a plan view, it has a portion that overlaps the three-dimensional gather portion 6 and the telescopic sheet 8. Specifically, it is fixed in the adhesive region A2 between the second skin side sheet 32 and the adhesive region A4 between the leak-proof sheet 4. Like the dorsal sweat-absorbing sheet 9A, the ventral sweat-absorbing sheet 9B is a sheet that easily absorbs sweat, and is a sheet containing hydrophilic fibers (water-absorbing fibers). Specifically, a ventral sweat-absorbing sheet 9B having a skin-side layer mainly composed of hydrophobic fibers and containing a small amount of hydrophilic fibers and a non-skin-side layer mainly composed of hydrophilic fibers can be exemplified. The ventral sweat-absorbing sheet 9B absorbs sweat with the hydrophilic fibers of the skin-side layer, and the sweat is permeated and diffused into the non-skin-side layer, while the hydrophobic fibers of the skin-side layer make it easier to retain the absorbed sweat. ..

The ventral sweat-absorbing sheet 9B is preferably different in color from the skin-side sheet 3 (first skin-side sheet 31, second skin-side sheet 32), the absorbent core 21, and the three-dimensional gathered portion 6. In the diaper 1, the colors of the first skin side sheet 31, the second skin side sheet 32, the absorber 2 (absorbent core 21 and the core wrap sheet 22), and the three-dimensional gather portion 6 are white, respectively, and the ventral sweat absorption. Sheet 9B is green. This makes it easier for the wearer and the person who intends to wear the diaper 1 to recognize that the ventral sweat absorbing sheet 9B is provided as a member for absorbing sweat. The "different color" means that the color of the ventral sweat-absorbing sheet 9B deviates from the color of the skin-side sheet 3 or the like by two or more hues in the Ostwald color wheel.

<<< About central area X and gather area Y >>>
As shown in FIG. 1 and the like, the dorsal waist circumference portion 1A of the diaper 1 is sandwiched between a pair of three-dimensional gather portions 6 in a plan view, and has a central region X in which the dorsal sweat absorbing sheet 9A and the telescopic sheet 8 overlap. It has a gathered area Y in which the three-dimensional gathered portion 6 and the dorsal sweat absorbing sheet 9A overlap. The central region X refers to a region including the center in the lateral direction of the diaper 1 in which the dorsal sweat absorbing sheet 9A and the telescopic sheet 8 overlap each other in a plan view. FIG. 3 is a diagram illustrating arrangements on the telescopic sheet 8 and the sweat absorbing sheets 9A and 9B. In FIG. 3, for convenience, the fixed portion 6m of the three-dimensional gather portion 6 is omitted. Further, the sweat absorbing sheets 9A and 9B are shown as solid lines and diagonally downward diagonally to the left, and the elastic sheet 8 is shown as solid and diagonally downward to the right. Further, the target member 15 is also shown by a solid line and three diagonal lines diagonally downward to the right. FIG. 4 is an enlarged view of one side in the lateral direction of FIG. 2A.

In the central region X, in the worn state, the dorsal sweat-absorbing sheet 9A fixed by the elastic sheet 8 and the adhesive region A3 becomes easier to approach the wearer's skin due to the contraction of the elastic sheet 8, and at the same time, the dorsal sweat-absorbing sheet 9A By being shrunk in the lateral direction, the liquid holding capacity of the dorsal absorption sheet 9A per unit area in the central portion of the dorsal waist circumference portion 1A can be increased, and more sweat can be easily absorbed. Further, as the elastic sheet 8 contracts, the dorsal sweat-absorbing sheet 9A is contracted laterally, so that unevenness is likely to be formed on the surface of the dorsal sweat-absorbing sheet 9A, and the installation area on the wearer's skin becomes smaller. .. As a result, it becomes easy to provide a gap between the wearer's skin and the dorsal sweat-absorbing sheet 9A, so that the air permeability can be improved.

Further, the liquid permeability of the three-dimensional gather portion 6 is lower than the liquid permeability of the skin side sheet 3. In the present embodiment, the skin-side sheet 3 includes the first skin-side sheet 31 and the second skin-side sheet 32. The three-dimensional gather portion 6 has lower liquid permeability than the first skin-side sheet 31 and is second. It has lower liquid permeability than the skin side sheet 32. Even when compared with the one in which the first skin side sheet 31 and the second skin side sheet 32 are overlapped, the three-dimensional gather portion 6 has lower liquid permeability.

Liquid permeability can be measured by the following method.
Each sheet is sampled in a rectangular shape of a predetermined size (for example, 40 mm × 40 mm), and is placed up and down between an upper cylinder (made of glass) having an inner diameter of 35 mm and a lower cylinder (made of glass) having an inner diameter of 35 mm. The sample is sandwiched between two packings (made of silicon), the clip is fitted to the annular flange provided at the lower end of the upper cylinder and the upper end of the lower cylinder, and the upper and lower cylinders are fixed so as to be perpendicular to the work table. Let me. Subsequently, a predetermined amount (for example, 50 g) of saline solution (saline solution having a concentration of 0.9%) is added at one time from the upper part of the upper cylindrical shape, and the number of seconds for the saline solution to permeate the sample is measured. do. The time from the addition of physiological saline until the liquid on each sample runs out is measured, and the shorter the time, the higher the liquid permeability, and the longer the time, the lower the liquid permeability.

Further, when the force required to extend the central region X by the unit length in the lateral direction is the central extension force Fx, the gather region Y has the force required to extend the central region Y by the unit length in the lateral direction. It has a low extension portion N smaller than the central extension force Fx. That is, when the force required to extend the low extension portion N laterally by a unit length is the low extension force Fn, the low extension force Fn is smaller than the central extension force Fx (Fn <Fx). It should be noted that the force required to extend each region by a unit length in the lateral direction is equal to the force to contract by a unit length in the lateral direction.

A comparison of the force (Fx) required to extend the central region X laterally by a unit length and the force (Fn) required to extend the low extension portion N laterally by a unit length is well known. It is good to do it by the method. For example, from the dorsal girth portion 1A to the central region X, all or part of the region including the center in the lateral direction and all or part of the low extension portion N are cut out as samples. Then, both ends of each sample are sandwiched between the chucks of the tensile tester. The load obtained when the sample is stretched with the chucks separated by a unit length is measured. Then, it is advisable to compare the values obtained by dividing the load of each sample by the length in the vertical direction of each sample.

The low elongation portion N will be described. The low elongation portion N is also a region N in which the elastic sheet 8 and the dorsal sweat absorbing sheet 9A are not bonded at the adhesive region A3. As shown in FIG. 4 and the like, the elastic sheet 8 is joined to the dorsal sweat absorbing sheet 9A via the adhesive region A3. Since the stretchable sheet 8 of the diaper 1 is not provided with the adhesive region A3 in the region N (FIG. 3 etc.) at the end in the lateral direction, the region N includes the three-dimensional gather portion 6 and the stretchable sheet 8 in a plan view. It is a region where the dorsal sweat-absorbing sheet 9A overlaps, and is a portion where the stretchable sheet 8 and the dorsal sweat-absorbing sheet 9A are not bonded. Specifically, in the manufacturing process, an adhesive such as a hot melt is provided between the regions N of the stretchable sheet 8 in the lateral direction, and each region N of the stretchable sheet 8 in the stretched state in the lateral direction is grasped to determine a predetermined value. It is attached to the non-skin side surface of the dorsal sweat-absorbing sheet 9A having a size, and then attached to the skin side surface of the leak-proof sheet 4 via the adhesive region A5. Therefore, since the adhesive such as hot melt is not provided in the region N, the region N of the elastic sheet 8 is a portion that is not bonded to the dorsal sweat absorbing sheet 9A. As a result, the region N of the stretchable sheet 8 is in a contracted state (natural state) without applying a stretchable force to the diaper 1. That is, the region N of the diaper 1 is a portion that does not extend.

Further, since the gathered region Y is provided with a three-dimensional gathered portion 6 on the skin side of the dorsal sweat absorbing sheet 9A and is fixed by the fixed portion 6 m, the central region X is due to the overlap of a plurality of members such as the three-dimensional gathered portion 6. It may have a low elongation portion in which the force for stretching by a unit length in the lateral direction is reduced. Further, a low extension portion may be provided by reducing the extension force of the portion corresponding to the gather region in the stretchable sheet 8 in advance. For example, in the elastic sheet 8, a plurality of rubber threads along the lateral direction are arranged in the portion corresponding to the central region X, and a smaller number of rubber threads than the central region X are arranged in the portion corresponding to the gather region Y. The stretchable sheet 8 may be used.

Even in a state where the dorsal sweat-absorbing sheet 9A absorbs sweat and the absorbed sweat is diffused laterally to the dorsal sweat-absorbing sheet 9A, the liquid permeability is lower on the skin side than the dorsal sweat-absorbing sheet 9A in the gather region Y. By providing the three-dimensional gather portion 6, the three-dimensional gather portion 6 in the gather region Y does not easily allow sweat to permeate to the skin side. Further, since the gathered region Y including the low elongation portion N has a weaker stretching force (contraction force) than the central region X, the force to bring the dorsal sweat absorbing sheet 9A closer to the skin side is weak, so that the dorsal sweat absorbing sheet 9A is applied to the skin. Reduces the risk of pushing to the side. Therefore, in the gathered region Y, it is possible to reduce the possibility that the sweat once absorbed by the dorsal sweat absorbing sheet 9A returns to the skin side. That is, in the central region X, the stretching force larger than that of the gathered region Y makes it easier for the dorsal sweat absorbing sheet 9A to approach the skin side, absorbs more sweat, and absorbs the absorbed sweat in the lateral direction of the dorsal sweat absorbing sheet 9A. In the gathered region Y having the low elongation portion N, the force to bring the dorsal sweat absorbing sheet 9A closer to the skin side is weak, and in the gathered region Y, the liquid permeability is closer to the skin side than the dorsal sweat absorbing sheet 9A. Since the three-dimensional gather portion 6 having a low temperature is provided, it is possible to reduce the possibility that the sweat absorbed by the dorsal sweat absorbing sheet 9A returns to the skin side. Further, since the region N of the diaper 1 is a portion that does not extend, a portion where the force for bringing the dorsal sweat absorbing sheet 9A closer to the skin side does not work can be provided in the gathered region Y, so that the dorsal sweat absorbing sheet 9A absorbs. It is easier to reduce the risk of sweat returning to the wearer's skin.

Further, a joint portion (joint region) in which the skin side sheet 3 and the back side sweat absorbing sheet 9A are joined between the skin side sheet 3 (second skin side sheet 32) and the back side sweat absorbing sheet 9A adjacent to each other in the thickness direction. It is preferable to have a non-joined portion B2 in which A2) and the skin-side sheet 3 and the dorsal sweat-absorbing sheet 9A are not joined. Specifically, as shown in FIG. 4, etc., between the second skin side sheet 32 and the dorsal sweat absorbing sheet 9A, the dorsal sweat absorbing sheet 9A is bonded to the second skin side sheet 32 at the adhesive region A2. Therefore, the adhesive region A2 is a joint portion, and the lateral end portion of the dorsal sweat absorbing sheet 9A has a so-called dry edge portion to which an adhesive to be bonded to the second skin side sheet 32 is not provided. This dry edge portion is the non-joined portion B2. The non-joined portion B2 makes it easy to provide a separated portion between the skin side sheet 3 (second skin side sheet 32) and the dorsal sweat absorbing sheet 9A, and the sweat absorbed by the dorsal sweat absorbing sheet 9A is on the skin side. Since it becomes difficult to move to the sheet 3 (second skin side sheet 32), it is possible to reduce the risk of sweat returning from the dorsal sweat absorbing sheet 9A to the wearer's skin. The non-joint portion between the dorsal sweat absorbing sheet 9A and the second skin side sheet 32 is not limited to the dry edge portion. For example, a bonded portion and a non-bonded portion may be provided by an adhesive pattern (stripes, spirals, etc.) when the back side sweat absorbing sheet 9A and the second skin side sheet 32 are bonded with an adhesive.

Further, it is more preferable that the region N and the non-joint portion B2 overlap each other in a plan view. In the region N, since the stretching force of the elastic sheet 8 does not work, the force for bringing the dorsal sweat absorbing sheet 9A closer to the skin side does not work. It becomes easy to separate the skin side sheet 3 (second skin side sheet 32) and the dorsal sweat absorbing sheet 9A. Therefore, it is possible to prevent the sweat absorbed by the dorsal sweat absorbing sheet 9A from returning to the skin side.

Regarding the dorsal sweat-absorbing sheet 9A and the telescopic sheet 8, it is preferable that the dorsal sweat-absorbing sheet 9A has a portion that does not overlap with the telescopic sheet 8 in a plan view. As shown in FIG. 3, the dorsal sweat-absorbing sheet 9A of the diaper 1 is larger than the elastic sheet 8. Further, both side ends of the dorsal sweat absorbing sheet 9A are provided outside the both side ends of the elastic sheet 8, and the vertical outer ends of the dorsal sweat absorbing sheet 9A are the vertical outer ends of the elastic sheet 8. It is provided on the outer side. Since the dorsal sweat-absorbing sheet 9A is provided on the skin side of the elastic sheet 8, a force that brings the dorsal sweat-absorbing sheet 9A closer to the skin side acts as the elastic sheet 8 contracts. At this time, in the plan view, in the portion where the dorsal sweat absorbing sheet 9A does not overlap with the elastic sheet 8, the force of the dorsal sweat absorbing sheet 9A closer to the skin side is less likely to work than the portion where the dorsal sweat absorbing sheet 9A and the elastic sheet 8 overlap. Since it is a portion, it is possible to make it difficult for the sweat absorbed by the dorsal sweat absorbing sheet 9A to return to the skin side.

Regarding the dorsal sweat-absorbing sheet 9A and the absorbent core 21, it is preferable that the dorsal sweat-absorbing sheet 9A does not overlap with the absorbent core 21 in a plan view. As a result, it is possible to reduce the risk that the excrement absorbed by the absorbent core 21 moves to the dorsal sweat-absorbing sheet 9A and the excrement absorbed by the dorsal sweat-absorbing sheet 9A is transferred to the wearer's skin. .. In the diaper 1, not only the dorsal waist circumference 1A but also the ventral waist circumference 1B is provided with the ventral sweat absorbing sheet 9B. Similar to the dorsal sweat-absorbing sheet 9A, it is more preferable that the ventral sweat-absorbing sheet 9B does not overlap with the absorbent core 21 in a plan view.

Further, it is preferable that the diaper 1 is a so-called tape type (open type) deployable disposable diaper, and the dorsal waist circumference portion 1A includes a stretchable sheet 8 and a dorsal sweat absorbing sheet 9A. Generally, when a wearer lying on his back is to wear a deployable disposable diaper, first, the dorsal waist circumference 1A is inserted and the dorsal waist circumference 1A is inserted under the wearer's back. By inserting it, the back of the wearer is covered with the dorsal waist circumference 1A. Subsequently, the inseam 1C and the ventral waist circumference 1B are arranged so as to cover the wearer's inseam and abdomen, and are appropriately locked with a fastening tape 10 or the like, so that the diaper 1 is put into a wearing state. In such a deployable disposable diaper, the dorsal waist circumference portion 1A is provided with the elastic sheet 8 and the dorsal sweat-absorbing sheet 9A, so that the rigidity is higher than that in the case where the elastic sheet 8 and the dorsal sweat-absorbing sheet 9A are not provided. This makes it easier to insert the dorsal waist circumference 1A under the wearer's back when the wearer wears it.

Usually, the deployable disposable diaper 1 shown in FIG. 1 or the like has a pair of folding lines F and F for folding both side ends in the lateral direction with the skin side inside. The pair of fold lines F and F are fold lines along the vertical direction. In the packaged state, the pair of fold lines F and F fold both ends in the horizontal direction inward in the horizontal direction and vertically. It is folded with the skin side inside at the center line CL in the direction. In such a diaper 1, one side end of the dorsal sweat absorbing sheet 9A is provided outside the fold line F on one side in the lateral direction, and the other side of the dorsal sweat absorbing sheet 9A is provided in the lateral direction. It is preferable that the end is provided outside the folding line F on the other side.

When a deployable disposable diaper (diaper 1) is to be worn by a wearer lying on his back, first, the portion folded by the center line CL in the vertical direction is unfolded, and then the diaper 1 is formed on a pair of fold lines F. By unfolding the lateral end portion of the diaper 1, the diaper 1 as shown in FIG. 1 and the like is unfolded. At this time, the pair of fold lines F usually have a so-called fold habit, and the lateral end portion of the diaper 1 is easily broken by the fold line F. On the other hand, in the diaper 1, since the dorsal sweat-absorbing sheet 9A is provided so as to straddle the pair of folding lines F and F, the rigidity of the dorsal sweat-absorbing sheet 9A increases the rigidity of the dorsal waist circumference 1A. , It becomes easy to maintain the unfolded state of the pair of fold lines F and F, respectively. This facilitates the wearer to insert the dorsal girth portion 1A under the wearer's back.

Further, it is preferable that the fiber density of the dorsal sweat absorbing sheet 9A is higher than the fiber density of the absorbent core 21. Since the fiber density of the dorsal sweat-absorbing sheet 9A is high, the rigidity of the dorsal sweat-absorbing sheet 9A can be increased as compared with the case where the fiber density of the dorsal sweat-absorbing sheet 9A is lower than the fiber density of the absorbent core 21. If the rigidity of the dorsal sweat-absorbing sheet 9A is increased, the rigidity of the dorsal waist circumference 1A can also be increased. Therefore, the dorsal waist circumference 1A is inserted under the back of the wearer lying on his back. It will be easier.

The fiber densities of the dorsal sweat-absorbing sheet 9A and the absorbent core 21 may be compared by a well-known method. For example, the fiber densities of the dorsal sweat-absorbing sheet 9A and the absorbent core 21 are measured as uniform, but if they are not uniform, a plurality of points are measured and the average density is compared. As a method for comparing the fiber density, for example, a predetermined size is cut out from the diaper 1 using the back sweat absorbing sheet 9A and the absorbent core 21 as samples, and the area and mass of each sample are measured, and the mass per unit area is measured. The basis weight (g / m ² ) is calculated. The density can also be calculated by measuring the thickness of each sample by the above method and dividing the basis weight (g / m ² ) of the sample by the thickness (m) (g / m ³ ).

Further, as shown in FIG. 1 and the like, it is preferable that the ventral waist circumference portion 1B has a ventral sweat absorbing sheet 9B. By providing the ventral sweat-absorbing sheet 9B as well as the dorsal sweat-absorbing sheet 9A of the dorsal waist-circling portion 1A, the ventral waist-absorbing sheet 9B facilitates absorption of sweat not only in the back but also in the abdomen. Further, in a plan view, it is preferable that the three-dimensional gather portion 6 and the ventral sweat absorbing sheet 9B overlap each other. As shown in FIG. 2C, in a plan view, the three-dimensional gather portion 6 and the ventral sweat-absorbing sheet 9B have an overlapping region Z. In the region Z, the sweat absorbed by the ventral sweat absorbing sheet 9B is transmitted to the skin side from the three-dimensional gathered portion 6 by providing the three-dimensional gather portion 6 having a lower liquid permeability than the ventral sweat absorbing sheet 9B on the skin side. This can be easily reduced, and the risk of sweat returning to the wearer's skin can be reduced. Further, since the ventral waist circumference portion 1B is provided with the ventral sweat absorbing sheet 9B, the rigidity of the ventral waist circumference portion 1B can be increased. As a result, it is possible to reduce the risk that the ventral end of the ventral waist circumference is bent or the ventral end of the ventral waist circumference is twisted according to the movement of the wearer.

It is preferable that the dorsal waist circumference 1A includes a dorsal sweat-absorbing sheet 9A and an elastic sheet 8, while the ventral waistline 1B includes a ventral sweat-absorbing sheet 9B and does not include an elastic sheet. The ventral waist circumference 1B is a portion that covers the wearer's abdomen, and since the wearer's abdomen is more rounded than the back, it is easy to feel good or bad on the skin. Therefore, since the ventral waist circumference 1B does not have the telescopic sheet, when the ventral waist circumference 1B is provided with the telescopic sheet, the discomfort given to the wearer due to the increased rigidity of the ventral waist circumference 1B is reduced. Can be made to.

When the dorsal waistline 1A is provided with the dorsal sweat-absorbing sheet 9A and the ventral waistline 1B is provided with the ventral sweat-absorbing sheet 9B, the outer end of the dorsal sweat-absorbing sheet 9A is the dorsal waistline 1A in the vertical direction. It is preferably at the same position as the end, and the outer end of the ventral sweat absorbing sheet 9B is at the same position as the end of the ventral waist circumference portion 1B. Specifically, as shown in FIG. 3, the outer end of the dorsal sweat-absorbing sheet 9A in the vertical direction is along the outer end of the dorsal waist circumference 1A in the vertical direction, and the vertical of the ventral sweat-absorbing sheet 9B. The outer edge in the direction is along the outer edge in the longitudinal direction of the ventral girth portion 1B. As a result, in the vertical direction, the outer end of the dorsal sweat-absorbing sheet 9A is provided inside the end of the dorsal waist circumference portion 1A and the outer end of the ventral sweat-absorbing sheet 9B is provided inside the end of the ventral waist circumference portion 1B. Since the dorsal sweat-absorbing sheet 9A and the ventral sweat-absorbing sheet 9B can be provided in a wider range than in the case of the above, more sweat can be absorbed.

As shown in FIG. 3, it is preferable that the vertical length (L9b) of the ventral sweat-absorbing sheet 9B is shorter than the vertical length (L9a) of the dorsal sweat-absorbing sheet 9A (L9b <L9a). The ventral waist circumference 1B and the dorsal waist circumference 1A are provided with the ventral sweat-absorbing sheet 9B and the dorsal sweat-absorbing sheet 9A, respectively, so that the wearer's abdomen and back sweat can be absorbed, while the ventral sweat-absorbing sheet 9B. By making the vertical length (L9b) shorter than the vertical length (L9a) of the dorsal sweat-absorbing sheet 9A (L9b <L9a), the vertical length (L9b) of the ventral sweat-absorbing sheet 9B can be reduced. The rigidity of the dorsal waist circumference 1A can be increased compared to the case where the length of the dorsal sweat absorbing sheet 9A is longer than the vertical length (L9a) (L9b ≧ L9a), and the back of the wearer lying on his back is under the back. Since the dorsal waist circumference 1A can be easily inserted into the side and the rigidity of the ventral waist circumference 1B can be lowered, the feel of the wearer in contact with the abdomen can be improved.

Further, as shown in FIG. 3, in the vertical direction, the dorsal sweat-absorbing sheet 9A is provided outside the dorsal end of the absorbent core 21, and the ventral sweat-absorbing sheet 9B is ventral to the absorbent core 21. It is preferably provided outside the edge. The excrement absorbed by the absorbent core 21 moves to the dorsal sweat-absorbing sheet 9A and the ventral sweat-absorbing sheet 9B, and the excrement transferred to the dorsal sweat-absorbing sheet 9A and the ventral sweat-absorbing sheet 9B reaches the wearer's skin. The risk of reaching it can be reduced. At this time, the distance (Db) between the ventral end of the absorbent core 21 and the dorsal end of the ventral sweat-absorbing sheet 9B is the dorsal end of the absorbent core 21 and the ventral end of the dorsal sweat-absorbing sheet 9A. It is more preferable that the distance from (Da) is shorter than (Db <Da). By doing so, the absorbent core 21 can be arranged in a longer region of the ventral waist circumference portion 1B in the vertical direction, so that excrement such as urine excreted toward the front side can be easily absorbed. .. That is, the sweat absorbing sheets 9A and 9B can absorb the sweat of the wearer while reducing the possibility that the excrement excreted toward the front side leaks to the outside of the diaper 1.

When the ventral waist circumference portion 1B includes the target member 15, it is preferable that the ventral waist circumference portion 1B has a portion where the target member 15 overlaps with the ventral sweat absorbing sheet 9B in a plan view, as shown in FIG. .. In the diaper 1, the outer end portion of the target member 15 in the vertical direction overlaps with the inner end portion of the ventral sweat absorbing sheet 9B in the vertical direction in a plan view. As a result, the rigidity of the target member 15 is increased, and the target member 15 can be easily kept on a flat surface, so that the fastening tape 10 can be easily locked to the target member 15 when the diaper 1 is worn.

In the vertical direction of the ventral waist circumference portion 1B, the ventral sweat absorbing sheet 9B and the absorbent core 21 are separated by the length Db. At this time, it is more preferable that the target member 15 is provided so as to straddle a portion (region of length Db) where the ventral sweat absorbing sheet 9B and the absorbing core 21 are separated from each other. In the vertical direction, the portion where the ventral sweat-absorbing sheet 9B and the absorbent core 21 are separated from each other (the region having a length Db) is a portion that is easily bent because of its low rigidity. Therefore, by arranging the target member 15 in the region straddling the portion where the ventral sweat absorbing sheet 9B and the absorbent core 21 are separated from each other, it is possible to alleviate the deformation due to the difference in rigidity of the separated portion.

=== Other embodiments ===
The above-described embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. It goes without saying that the present invention can be modified or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.

In the above-described embodiment, the low extension portion N is provided in a part of the gather region Y, but the present invention is not limited to this. A low extension portion N may be provided over the entire gathered region Y. Not only the entire gathered region Y but also a part of the central region X may have a low elongation portion N. Even in such a case, the low extension portion N is extended by the unit length in the lateral direction from the force (Fx) that extends the central region X including the center in the lateral direction by the unit length in the lateral direction. By reducing the required force (Fn), the central region X makes it easier to bring the dorsal sweat absorbing sheet 9A closer to the skin side with a larger stretching force than the low stretching portion N, and gathers while absorbing more sweat. In the region Y, by providing the three-dimensional gather portion 6 having a lower liquid permeability on the skin side than the dorsal sweat absorbing sheet 9A, the sweat absorbed by the dorsal sweat absorbing sheet 9A is less likely to return to the skin side, and a low elongation portion N is provided. As a result, the force of bringing the back side sweat absorbing sheet 9A closer to the skin side can be weakened, and the possibility that the sweat of the back side sweat absorbing sheet 9 returns to the skin side can be reduced.

Further, in the above-described embodiment, the dorsal waist circumference portion 1A (first waist circumference portion) includes a dorsal sweat-absorbing sheet (first sweat-absorbing sheet) 9A and a telescopic sheet 8, and the ventral waist circumference portion 1B is a ventral sweat-absorbing sheet (first). 2 Sweat-absorbing sheet) 9B is provided, but the configuration is not limited to this. The ventral waistline is provided with a ventral sweat-absorbing sheet (first sweat-absorbing sheet) and an elastic sheet as the first waistline, and the dorsal waistline is provided with a dorsal sweat-absorbing sheet (second sweat-absorbing sheet) as the second waistline. , The configuration may not include a telescopic sheet. At this time, in the gathered area, the three-dimensional gathered portion, the ventral sweat-absorbing sheet and the elastic sheet overlap each other in the plan view, and the three-dimensional gathered portion and the dorsal sweat-absorbing sheet overlap each other. And the elastic sheet may overlap, and the gathered region in the ventral waist circumference portion may have a low extension portion. Even in such a case, in the gathered area, the ventral sweat-absorbing sheet of the ventral waist circumference (first waist circumference) is applied to the wearer's skin due to the low extension portion of the ventral waist circumference (first waist circumference). In plan view, the sweat of the dorsal sweat-absorbing sheet of the ventral waist circumference (first waist circumference) and the dorsal waist circumference (second waist circumference) that overlap with the three-dimensional gathered portion returns to the skin side while suppressing the approach. Can be reduced. In addition, both the dorsal waist circumference portion and the ventral waist circumference portion may be configured to include a sweat absorbing sheet and an elastic sheet.

1 Diapers (deployable disposable diapers, absorbent articles),
1A Dorsal girth (1st girth),
1B ventral waist circumference (second waist circumference),
1C Inseam,
2 absorber,
21 Absorbent core,
22 core wrap sheet,
3 Skin side sheet,
31 First skin side sheet (skin side sheet),
32 Second skin side sheet (skin side sheet),
4 Leakage-proof sheet (non-skin side sheet),
5 Exterior sheet (non-skin side sheet),
6 Three-dimensional gather part,
6s standing part,
6m fixed part,
61 Elastic member for three-dimensional gather part,
7 Elastic members around the legs,
8 Telescopic sheet (dorsal telescopic sheet),
9A Dorsal sweat-absorbing sheet (sweat-absorbing sheet, first sweat-absorbing sheet),
9B ventral sweat-absorbing sheet (second sweat-absorbing sheet),
10 Fastening tape,
11 Locking part,
15 Target member,
A1, A2, A3, A4, A5, A6, A7, A8, A9 Adhesive region,
F fold line,
X central area,
Y gather area,
N low elongation part (region)

Claims (17)

It has a vertical direction, a horizontal direction, and a thickness direction that are orthogonal to each other.
With the skin side sheet,
Non-skin side sheet and
An absorbent core provided between the skin-side sheet and the non-skin-side sheet in the thickness direction,
An elastic sheet provided between the skin-side sheet and the non-skin-side sheet in the thickness direction and stretchable in the lateral direction,
In the thickness direction, between the skin-side sheet and the elastic sheet, a sweat-absorbing sheet provided on the outer side in the vertical direction from the absorbent core, and
Absorption having a pair of three-dimensional gathered portions that can stand upright on the skin side by the elastic member for the three-dimensional gathered portion that has lower liquid permeability than the skin-side sheet, is provided on the skin side of the sweat-absorbing sheet, and expands and contracts in the vertical direction. It ’s a sex item,
In the unfolded state
In a plan view, a central region sandwiched between the pair of three-dimensional gathered portions and where the sweat-absorbing sheet and the stretchable sheet overlap, and a gathered region where the three-dimensional gathered portion, the sweat-absorbing sheet, and the stretchable sheet overlap each other. Have and
When the force required to extend the central region by the unit length in the lateral direction is defined as the central extension force.
An absorbent article characterized in that the gathered region has a low extension portion in which the force required to extend the gathered region by a unit length in the lateral direction is smaller than the central extension force. The absorbent article according to claim 1.
An absorbent article characterized in that the low elongation portion is a non-elongable portion. The absorbent article according to claim 1 or 2.
Between the skin-side sheet and the sweat-absorbing sheet adjacent to each other in the thickness direction, the joint portion where the skin-side sheet and the sweat-absorbing sheet are joined, and the skin-side sheet and the sweat-absorbing sheet are not joined. An absorbent article characterized by having a non-joint portion. The absorbent article according to claim 3.
The low elongation portion is a portion that does not extend.
An absorbent article characterized in that the low elongation portion and the non-joint portion overlap in the plan view. The absorbent article according to any one of claims 1 to 4.
An absorbent article, characterized in that, in the plan view, the sweat-absorbing sheet has a portion that does not overlap with the elastic sheet. The absorbent article according to any one of claims 1 to 5.
In the plan view, the sweat-absorbing sheet is an absorbent article characterized in that it does not overlap with the absorbent core. The absorbent article according to any one of claims 1 to 6.
The first waistline and
The second waistline and
It has a crotch portion provided between the first waist circumference portion and the second waist circumference portion, and has a crotch portion.
The first waistline portion includes a first sweat absorbing sheet and the telescopic sheet.
The second waistline portion includes a second sweat absorbing sheet.
In the gathered area, the three-dimensional gathered portion, the first sweat-absorbing sheet, and the telescopic sheet overlap each other, and the three-dimensional gathered portion and the second sweat-absorbing sheet overlap each other.
In the central region, the first sweat absorbing sheet and the telescopic sheet overlap each other in the plan view.
An absorbent article characterized in that the gathered region in the first waist circumference portion has the low elongation portion. The absorbent article according to any one of claims 1 to 6.
The absorbent article is a deployable disposable diaper.
Ventral girth and
The dorsal girth and
It has a crotch portion provided between the ventral waist circumference and the dorsal waist circumference.
The telescopic sheet is a dorsal telescopic sheet arranged around the dorsal waistline.
An absorbent article, wherein the sweat-absorbing sheet is a dorsal sweat-absorbing sheet arranged around the dorsal waist. The absorbent article according to claim 8.
It has a pair of fold lines along the vertical direction and has
The pair of fold lines are fold lines for folding both side ends in the horizontal direction along the vertical direction with the skin side inside in the packaged state.
In the lateral direction
One side end of the dorsal sweat absorbing sheet is provided outside the fold line on one side.
An absorbent article characterized in that the other side end of the dorsal sweat absorbing sheet is provided outside the folding line on the other side. The absorbent article according to claim 8 or 9.
An absorbent article characterized in that the fiber density of the dorsal sweat-absorbing sheet is higher than the fiber density of the absorbent core. The absorbent article according to any one of claims 8 to 10.
The ventral waist circumference portion has a ventral sweat absorbing sheet and has a ventral sweat absorbing sheet.
An absorbent article characterized in that the three-dimensional gather portion and the ventral sweat-absorbing sheet overlap each other in the plan view. The absorbent article according to claim 11.
An absorbent article characterized in that the length of the ventral sweat-absorbing sheet in the vertical direction is shorter than the length of the dorsal sweat-absorbing sheet in the vertical direction. The absorbent article according to claim 11 or 12.
In the deployed state,
In the vertical direction
The ventral sweat-absorbing sheet is provided outside the ventral end of the absorbent core.
The dorsal sweat-absorbing sheet is provided outside the dorsal end of the absorbent core.
The distance between the ventral end of the absorbent core and the dorsal end of the ventral sweat-absorbing sheet is shorter than the distance between the dorsal end of the absorbent core and the ventral end of the dorsal sweat-absorbing sheet. An absorbent article characterized by that. The absorbent article according to any one of claims 8 to 13.
The dorsal girth portion comprises a fastening tape provided at the lateral end portion.
The non-skin side surface of the ventral waist circumference includes a target member that can be engaged with the fastening tape.
The ventral waist circumference portion has a ventral sweat absorbing sheet and has a ventral sweat absorbing sheet.
In the plan view, the target member is an absorbent article characterized by having a portion overlapping with the ventral sweat absorbing sheet. The absorbent article according to claim 14.
In the vertical direction
The ventral sweat-absorbing sheet and the absorbent core are separated from each other.
An absorbent article characterized in that the target member is provided so as to straddle a portion where the ventral sweat absorbing sheet and the absorbent core are separated from each other. The absorbent article according to any one of claims 11 to 15.
In the vertical direction
The outer end of the ventral sweat-absorbing sheet is at the same position as the end of the ventral waist circumference.
An absorbent article characterized in that the outer end of the dorsal sweat-absorbing sheet is at the same position as the end of the dorsal waist circumference portion. The absorbent article according to any one of claims 1 to 16.
An absorbent article characterized in that the color of the sweat-absorbing sheet is different from the color of the skin-side sheet, the absorbent core, the elastic sheet, and the three-dimensional gathered portion.

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