JP2022175463A - absorbent article - Google Patents

Abstract

To provide an absorbent article having an absorber capable of easily bending along a midline of a wearer.SOLUTION: An absorbent article has: an absorber that absorbs body fluid discharged from a wearer; a pair of grooves that are provided at a skin surface side-crotch part of the absorber and extend in a longitudinal direction of the absorber; and a contraction member that is provided on a non-skin surface side of the absorber and the inside of the pair of grooves in a width direction and is biased to contract inwards in the width direction of the absorber. In a stretched state, the contraction member adheres to, at each end in its width direction, the inside of the pair of grooves of the absorber in the width direction, while in a contracted state, the contraction member brings the pair of grooves closer to each other, and lifts the absorber to the skin surface side.SELECTED DRAWING: Figure 8

Description

The present invention relates to absorbent articles.

A diaper, which is an absorbent article, generally incorporates an absorbent body inside laminated sheets. Since the absorber absorbs water contained in bodily fluid discharged by the wearer, it is desirable that the absorber is in contact with the discharge port.

In the absorbent article, by forming a bending groove in the absorbent body, the cross-sectional shape in the width direction of the absorbent body is W-shaped when worn, and the elastic core wrap sheet is biased and absorbed by the crotch part of the wearer. A technique for bringing the body closer has been proposed (Patent Document 1).

Japanese Patent Application Laid-Open No. 2018-166936

Patent Document 1 proposes using a core wrap sheet that wraps the absorbent body and only a portion of which has stretchability in order to bring the absorbent body closer to the wearer's crotch region. However, it is difficult to manufacture members having different physical properties only within a certain range, as in Cited Document 1.

In order to solve the above problem, a shrinkable member is added to the widthwise inner portion of the pair of grooves on the non-skin surface side of the absorbent body to bend the absorbent body.

Specifically, the present invention includes an absorbent body that absorbs bodily fluids discharged from a wearer, and a pair of grooves that are provided in the crotch part on the skin side of the absorbent body and extend in the longitudinal direction of the absorbent body. a contracting member disposed on the non-skin surface side of the absorbent body and inside in the width direction of the pair of grooves and biased to contract inward in the width direction of the absorbent body; In a stretched state, both ends of the member in the width direction are adhered to the inner side of the pair of grooves in the width direction of the absorbent body. , provides an absorbent article.

The pair of grooves may extend toward the front body region of the absorbent body, and the contraction member may be arranged on the abdomen side of the pair of grooves.

The pair of grooves may extend toward the back body region of the absorbent body, and the contraction member may also be arranged on the back side of the pair of grooves.

The shrinkable member and the absorbent body may be intermittently adhered to each other in the width direction of the absorbent body.

The shrinkable member and the absorbent body are bonded together by a plurality of adhesive lines, and the width of the adhesive lines is thicker than the other adhesive lines at both ends of the shrinkable member in the width direction and at the central portion of the absorbent body. you can

The shrinkable member and the absorbent body may be bonded together by a plurality of adhesive lines, and the width of the adhesive lines may be wider than the other adhesive lines at both ends of the shrinkable member in the width direction.

The shrinkable member is arranged between the non-skin surface side of the absorbent body and the skin surface side of the cover sheet, and the cover sheet and the shrinkable member are also intermittently bonded in the width direction of the cover sheet. You can do it.

The shrinkable member is arranged between the non-skin surface side of the absorbent body and the skin surface side of the cover sheet, and the cover sheet and the shrinkable member are arranged at the width direction end portions of the shrinkable member and the pair of A pair of bonding portions may be formed by bonding to each other at locations corresponding to the inner sides of the grooves in the width direction.

The pair of grooves may be formed by reducing the basis weight of the absorbent body at the positions.

The pair of grooves may be formed by compressing the absorbent body at the positions.

The pair of grooves may be formed by slitting the absorbent body.

According to the present invention, it is possible to provide an absorbent article in which the cross-sectional shape in the width direction of the absorbent body becomes W-shaped when worn as a separate member without changing the physical properties of the existing structural member.

1 is a perspective view of a diaper according to an embodiment; FIG. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a plan view of the diaper according to the embodiment. FIG. 4 is a plan view of another form of the diaper according to the embodiment. FIG. 5 is a plan view of another form of the diaper according to the embodiment. FIG. 6 is a plan view of another form of the diaper according to the embodiment. FIG. 7 is a cross-sectional view of the crotch portion of the diaper according to the embodiment. FIG. 8 is a cross-sectional view of the crotch portion in a state in which the contracting member according to the embodiment is contracted. FIG. 9 is a diagram showing the detailed structure of the shrinkable member according to the embodiment. FIG. 10 is a diagram showing another structure of the contraction member according to the embodiment. FIG. 11 is a diagram showing another structure of the contraction member according to the embodiment. FIG. 12 is a diagram showing absorbent body adhesion positions of the diaper according to the embodiment.

Hereinafter, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. The configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

In the present embodiment, a tape-type disposable diaper (which is an example of a "sanitary product" in the present application and is hereinafter simply referred to as a "diaper") has a front body and a back facing the wearer's abdomen. The longitudinal direction is the direction that connects the back body that is arranged on the back. Between the front body (one side in the longitudinal direction) and the back body (the other side in the longitudinal direction) (center in the longitudinal direction), there is an inseam that is placed in the wearer's crotch (placed facing the crotch) department is located. In addition, in a state in which the diaper is worn by the wearer (hereinafter abbreviated as "wearing state"), the side facing the wearer's skin (the inner side in the worn state) is the skin side, and the opposite side of the skin side. The side (the outer side when worn) is the non-skin side. Furthermore, the direction connecting the skin surface side and the non-skin surface side is defined as the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, viewing from the thickness direction is defined as planar view.

In this embodiment, the contents of the invention will be explained using a tape-type disposable diaper as an example. INDUSTRIAL APPLICABILITY The present invention relates to an absorbent article that has an absorbent body and is worn around the crotch, and can naturally be applied to pants-type diapers and inner pads.

FIG. 1 is a perspective view of a diaper according to this embodiment. The diaper 1 has a crotch region 1B corresponding to the crotch covering the genitals of the wearer when worn, and a front body region 1F positioned in front of the crotch region 1B and corresponding to the wearer's front body. , and a back body region 1R which is positioned behind the crotch region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R that can be attached to the front patch 2F provided on the non-wearer side surface of the front body region 1F are provided on the left and right edges of the back body region 1R. When the tapes 2L and 2R are attached to the front patch 2F in a state in which the front body region 1F is arranged on the abdomen side of the wearer and the back body region 1R is arranged on the back side of the wearer, the diaper 1 can be put on. It is secured to the wearer's body in a manner that surrounds the wearer's waist and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can stand or walk while wearing the diaper 1 .

In the diaper 1, an absorbent body capable of absorbing and retaining liquid is mainly arranged around the crotch region 1B. In addition, in the diaper 1, in order to suppress the formation of gaps between the diaper 1 and the skin of the wearer, which will serve as an outflow path for the liquid, the parts surrounding the wearer's legs (thighs) are provided with Leg gathers 3AL and 3AR are provided, three-dimensional gathers 3BL and 3BR are provided inside the diaper 1 in the width direction of the leg gathers 3AL and 3AR, and waist gathers 3R are provided around the waist of the wearer. The leg gathers 3AL, 3AR, the three-dimensional gathers 3BL, 3BR, and the waist gathers 3R are in close contact with the wearer's skin due to the elastic force of the elastic members. Therefore, the liquid discharged from the wearer's pubic region is absorbed by the absorber of the diaper 1 without leaking from the diaper 1 . As the elastic member, thread-like or band-like rubber can be appropriately selected.

FIG. 2 is an exploded perspective view of the diaper 1. FIG. The diaper 1 has a cover sheet 4 forming an outer surface in the worn state. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance with constrictions 4KL and 4KR provided at portions corresponding to the long sides, and forms the exterior surface of the diaper 1 . The constrictions 4KL and 4KR are provided at sites where the wearer's thighs are located. The cover sheet 4 is provided to reinforce the later-described back sheet 5 and to improve the feel of the cover sheet. can be done. Examples of thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may have a multi-layer structure having an inner cover sheet and an outer cover sheet.

The diaper 1 has a back sheet 5 , an absorbent body 6 and a top sheet 7 which are laminated in order on the surface of the cover sheet 4 facing the wearer. The back sheet 5, the absorbent body 6, and the top sheet 7 are all sheet members having a substantially rectangular appearance, and are provided with a pair of grooves 10 at the crotch contact portion. They are sequentially stacked on the cover sheet 4 in a state in which the longitudinal direction coincides with the longitudinal direction of the cover sheet 4 . The back sheet 5, like the cover sheet 4, is a sheet made of a liquid-impermeable thermoplastic resin to suppress leakage of bodily fluids. The back sheet 5 is preferably made of a material having moisture permeability in order to prevent stuffiness when worn. The top sheet 7 is made of an air-through nonwoven fabric containing thermoplastic resin fibers, which is arranged on the wearer's skin side so as to cover the absorbent surface of the absorbent body 6 . This top sheet 7 has liquid permeability in part or in its entirety. Therefore, when the diaper 1 is worn, bodily fluids discharged from the wearer pass through the top sheet 7, which can contact the wearer's skin, and enter the absorbent body 6, where they are absorbed. Moreover, the top sheet 7 may have hydrophilicity. Note that the longitudinal direction of the diaper 1 is the same as the longitudinal direction of the absorbent body 6 and the top sheet 7 .

The backsheet 5, absorbent body 6, and topsheet 7 all extend from the front body region 1F to the back body region 1R. Therefore, when the cover sheet 4, in which the back sheet 5, the absorbent body 6, and the top sheet 7 are laminated, covers the genital area of the wearer, the longitudinal ends of the back sheet 5, the absorbent body 6, and the top sheet 7 are It is in a state of being positioned on the wearer's ventral side and dorsal side. In other words, the wearer's pubic area is covered with the absorber 6 from the wearer's ventral side to the dorsal side. Therefore, the discharged liquid comes into contact with the absorbent body 6 via the top sheet 7 regardless of whether the wearer discharges the liquid to the outside of the body, either with the wearer's stomach facing downward or with the back facing downward. will do.

Further, in the diaper 1, the elastic members 4SL, 4SR for forming the leg gathers 3AL, 3AR are provided between the cover sheet 4 and the back sheet 5 so as to stretch in the longitudinal direction of the diaper 1. As shown in FIG. The elastic members 4SL and 4SR are provided in an appropriate number determined according to the elastic force (contraction force) required in the design of the diaper 1 and the like.

Further, the diaper 1 has elongated strip-shaped side sheets 8L and 8R. The side sheets 8L and 8R are liquid-impermeable sheets provided on the long sides of the top sheet 7 . As with the cover sheet 4, the side sheets 8L and 8R are provided with constrictions 8KL and 8KR at portions where the wearer's thighs are positioned. Elastic members 8EL and 8ER for forming the three-dimensional gathers 3BL and 3BR are woven into the side sheets 8L and 8R along the longitudinal direction. The side sheets 8L and 8R are drawn in the longitudinal direction by the contractile force of the elastic members 8EL and 8ER and stand up from the top sheet 7 when the diaper 1 is put on, that is, when the diaper 1 is in a U shape when viewed from the side. The three-dimensional gathers 3BL and 3BR are closely attached to the body surface and prevent discharge from flowing out.

In the cover sheet 4, an elastic member 4C for preventing a gap from being formed between the diaper 1 and the waist circumference of the wearer is provided inside the diaper 1 in the width direction of the elastic members 4SL and 4SR in the longitudinal direction of the diaper 1. are set along. 4 C of elastic members are provided according to the elastic force (contraction force) etc. which are requested|required by design in the diaper 1. As shown in FIG.

Further, the elastic member 9ER for forming the waist gathers 3R described above is provided between the back sheet 5 and the top sheet 7 at a position on the dorsal side of the end portion of the absorbent body 6C. The elastic member 9 ER is provided between the back sheet 5 and the top sheet 7 so that the longitudinal direction, which is the stretching direction, is the horizontal direction of the diaper 1 . Therefore, when the tapes 2L and 2R provided on both the left and right sides of the elastic member 9ER are attached to the front patch 2F on the abdomen side of the wearer, the elastic member 9ER exerts a contractile force and the diaper 1 is attached to the wearer. The diaper 1 is brought into close contact with the wearer's abdomen to prevent a gap from being formed.

The absorber 6 contains short fibers of cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers obtained by hydrophilizing synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate. It has a structure that holds a granular absorbent resin (polymer water absorbent) such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a crosslinked structure that can absorb and hold ing. In addition, the absorber 6 may contain a deodorant to suppress the odor of the discharged matter.

The SAP particles of the present embodiment refer to granulated resin compositions containing SAP. The "resin composition containing SAP" as used herein refers to both a composition consisting only of SAP and a composition containing SAP as a main component and other substances to the extent that it does not adversely affect water absorption. It is a concept that includes Examples of "other substances" include additives (such as surface modifiers added for the purpose of hydrophobizing the particle surface), unreacted monomers remaining during the synthesis of SAP, and the like.

Note that the absorbent body 6 may be wrapped with a core wrap sheet 6A (not shown). The core wrap sheet 6A is a water-permeable sheet made of pulp fibers such as tissue paper or thin resin fibers, maintains the shape of the absorbent body 6, and prevents SAP particles from scattering to other structures. In addition, the passage of urine from the skin surface side to the absorbent body 6 is not hindered.

FIG. 3 is a plan view of the diaper according to the embodiment. A crotch region 1B of the sheet-like absorbent body 6 is provided with a pair of grooves 10 extending in the longitudinal direction of the diaper from the crotch portion on the skin side. The pair of grooves 10 extends parallel to the width direction at equal distances from the center portion in the width direction of the diaper. The pair of grooves 10 are formed by, for example, partially compressing the absorbent body 6 at the forming position or reducing the basis weight of the absorbent body 6 at the forming position in the manufacturing process of the diaper. can be formed. The pair of grooves 10 may be formed by heating the absorbent body to fuse the skin side and the non-skin side, or using an absorbent body having slits from the beginning. In this case, the bodily fluids that have fallen into the slits go around to the non-skin side of the absorbent body 6 and are absorbed by the absorbent body 6 also from the non-skin side, so that the absorption speed can be increased. In addition, when forming the pair of grooves 10 by partially compressing the absorbent body 6, there is a problem that the density of the pair of grooves 10 increases and the grooves 10 themselves become hard. Regarding this point, by providing the pair of grooves 10 mainly only in the crotch region 1B, it is difficult for the hardened absorbent body to come into contact with the skin surface, thereby suppressing deterioration in wearing comfort.

A tape-like contraction member 11 biased to contract inward in the width direction is stretched inside the pair of grooves 10 on the non-skin surface side in the longitudinal direction central portion of the crotch region 1B of the absorbent body 6. affixed in this state. At the central portion in the width direction of the diaper, the pair of grooves 10 of the absorbent body 6 come closer to each other due to the urging force of the contracting member 11, and as a result, the absorbent body 6 swells on the skin surface side and easily comes into contact with the human body. As a result, the absorbent body 6 easily comes into contact with the urethral opening at the urethral opening contact position. In addition, the pair of grooves 10 provided on the left and right sides of the urethral opening abutting position in the width direction also functions as a flow path for body fluid, and the discharged body fluid is dispersed in the absorbent material around the pair of grooves 10, and the absorption rate is increased. help you get up

By providing the pair of grooves 10 and contracting member 11 in this manner, the absorbent body 6 can be maintained in a state close to the urethral opening, and even when there is a large amount of excrement, the absorbent body 6 can efficiently absorb it, and the crotch can be easily absorbed. External leakage of discharge due to leakage can be prevented.

4 to 6 are plan views of different forms of the diaper according to the embodiment. In FIG. 4, the contracting member 11 is installed not only in the central part of the crotch region 1B, but also on the non-skin surface side of the absorbent body 6 in the front body region 1F (abdominal side) and the back body region 1R (back side). It is By providing contraction members 11 at a plurality of locations, the pair of grooves 10 are urged to approach each other over a wide area in the longitudinal direction, and the absorbent body 6 on the inner side of the pair of grooves 10 in the width direction swells toward the skin surface. It becomes easy to abut on the midline of the human body. Therefore, the effluent absorbing effect can be greatly enhanced.

It should be noted that the portions where the contractile member 11 is arranged do not necessarily need to be provided on both the front body region 1F side and the back body region 1R side of the crotch region 1B. In particular, since the urethral outlet for men exists in the direction of the front body region 1F, for example, as shown in FIG. , a better effect can be expected compared to the case where the shrinkable member 11 is arranged only in the center of the crotch region 1B in the longitudinal direction. In addition, when worn by a wearer who often sleeps on his or her back, discharges rather flow toward the back body region 1R. Therefore, as shown in FIG. It can be arranged only in the direction of the back body region 1R, and a better effect can be expected compared to the case where the contractile member 11 is arranged only in the center of the crotch region 1B in the longitudinal direction.

The thickness of the absorbent body 6 at the position where the shrinkable member 11 is provided may be made thinner than at other positions (particularly, the longitudinal peripheral portion of the diaper where the shrinkable member 11 is not provided). In other words, a part of the absorbent body 6 is provided with a thinned portion, and the shrinkable member 11 is arranged at that position. With this configuration, the absorber 6 is easily deformed by the contractile force of the contractile member 11 at the position where the contractile member 11 is arranged. In addition, by easily deforming a part of the absorbent body 6, the absorbent body 6 at the position where the shrinkable member 11 exists becomes a base point of the folded shape, and the part having a normal thickness in the longitudinal direction of the absorbent body 6 is also deformed. This makes it easier for the absorbent body 6 to come into contact with the midline of the human body.

In addition, the thickness of the absorbent body 6 can also be reduced around the position where the shrinkable member 11 is provided in the longitudinal direction. With this configuration, the displacement caused by the contractile force of the contractile member 11 can be easily transmitted in the longitudinal direction, and the absorber 6 can more easily come into contact with the midline of the human body.

Furthermore, the structures of contents such as short fibers and SAP particles contained in the absorbent body 6 are not uniform. In order for the absorbent body 6 to perform its functions appropriately, there are portions consisting only of short fibers, portions containing a large amount of SAP particles, and portions having a low content density. It is also possible to form a multi-layered structure in which a plurality of sheets mainly composed of short fibers are superimposed and SAP particles are dispersed between them. The absorber 6 having such an internal structure can also change the rigidity of specific parts by adjusting the structure. By adjusting the internal structure without changing the thickness of the absorbent body 6 and facilitating the transmission of the deformation caused by the contractile force of the contractile member 11 in the longitudinal direction, the absorbent body 6 can easily come into contact with the midline of the human body. good. It is also possible to reduce the thickness of the absorber 6 at the location where the shrinkable member 11 is provided and the thickness of the absorber 6 around it in the longitudinal direction, and further adjust the internal structure so that the shrinkage force of the shrinkable member 11 can be easily transmitted in the longitudinal direction.

FIG. 7 is a cross-sectional view of the central portion of the diaper according to the embodiment. Specifically, it is a cross-sectional view of the diaper in FIG. 3 taken along line AA. The absorbent body 6 is wrapped with a core wrap sheet 6A, and further wrapped with a liquid-permeable top sheet 7 on the skin side and a liquid-impermeable back sheet 5 on the non-skin side. Liquid-impermeable side sheets 8R and 8L rise toward the skin side from both ends in the width direction of the absorbent body 6, and the skin side ends of the side sheets 8R and 8L are made of thread rubber or the like. It is biased by an elastic body and functions as three-dimensional gathers 3BR and 3BL. Each sheet is adhered by hot-melt or the like. In this embodiment, each sheet adhered to the absorbent body 6 is actually adhered to the core wrap sheet 6A.

A pair of grooves 10 are cut in the skin surface side of the absorbent body 6 and the top sheet 7 at positions equidistant from the center in the width direction of the absorbent body 6 in the width direction. Alternatively, the pair of grooves 10 may be provided only on the absorbent body 6 and the top sheet 7 may not be provided with the pair of grooves 10 . When embossing is applied after laminating the top sheet 7 on the absorbent body 6 in the diaper manufacturing process, a pair of grooves 10 are provided in both the absorbent body 6 and the top sheet 7 as shown in FIG. However, if the top sheet 7 is laminated after the absorbent body 6 is embossed, the pair of grooves 10 may not appear in the top sheet 7 when the diaper is spread in the width direction. It is possible.

The shrinkable member 11 is arranged on the non-skin surface side of the absorbent body 6 and inside in the width direction from the region in which the pair of grooves 10 are cut, and is adhered to the absorbent body 6 by hot melt or the like. The shrinking member is a member that shrinks other bonded members in a certain direction, and urges the absorber 6 toward the center in the width direction. In the distribution stage, the shrinkable member 11 is in a stretched state.

FIG. 8 is a cross-sectional view of the crotch portion in a state in which the contracting member according to the embodiment is contracted. When the diaper is put on, the contracting member 11 is contracted and urges the absorbent body 6 wrapped with the core wrap sheet 6A so that the pair of grooves 10 approach each other. As a result, the absorbent body 6 on the inner side in the width direction of the pair of grooves 10 swells toward the skin surface, and the absorbent body 6 easily comes into contact with the midline of the wearer's body. The urethral opening and the anus are present in the midline of the human body. As a result, the discharged material comes into contact with the absorbent body 6 immediately after being discharged and absorbs water, and the water that has not been completely absorbed in the central portion spreads to the surrounding absorbent body 6 using the pair of grooves 10 as flow paths, causing lateral leakage. quickly absorbed before the onset of

The shrinkable member 11 may be arranged between the core wrap sheet 6A and the top sheet 7 on the skin surface side of the absorbent body 6 and fixed to the core wrap sheet 6A side. In this case, the shrinkable member 11 may be hydrophobic, but since the excretion is likely to flow on the skin side and needs to be quickly absorbed by the absorbent 6, the shrinkable member 11 is more water permeable. preferred. Also, the shrinkable member 11 may be provided with a plurality of through holes. Urine coming in contact with the shrinkable member 11 passes through the plurality of through-holes and is quickly absorbed by the absorber 6 . The plurality of through-holes are essential when the shrinkable member 11 is hydrophobic, but are also preferable when the shrinkable member 11 is water-permeable, since the absorption of exudates is faster. The contracting member 11 near the urethral contact position may be made water permeable, and the contracting member 11 provided at a position far from the urethral contact position, where excretions generally do not directly pass, may be made hydrophobic.

As described above, when the shrinkable member 11 is arranged on the skin surface side of the absorbent body 6 and the shrinkable member 11 is hydrophobic, water that has already permeated the absorbent body 6 passes through the shrinkable member 11. It can be prevented from flowing back to the skin surface and deteriorating the wearing feeling. Such a shrinkable member 11 may be configured without a through hole.

FIG. 9 is a diagram showing the detailed structure of the shrinkable member according to the embodiment. The shrinkable member 11 incorporates a plurality of elastic bodies 12 such as rubber threads. The contractile member 11 is biased by the elastic force of the elastic body 12 so as to contract in the extending direction of the elastic body 12 . The structure of the contracting member 11 is not limited to this structure, and the contracting member 11 itself may be formed of a material having contraction force in a certain direction. Moreover, the shrinkable member 11 may be provided with a plurality of through holes as described above.

The skin side of the shrinkable member 11, that is, the surface in contact with the absorbent body 6, is coated with hot melt at equal intervals (a plurality of adhesive lines) parallel to the longitudinal direction of the diaper. The shrinkable member 11 is adhered to the absorbent body 6 by the adhesive force of the hot melt. In the example of FIG. 9, a hot melt 20 having a small width and weak adhesive force is attached to the shrinkable member 11 parallel to the longitudinal direction of the diaper (another adhesive line). The hot melt 20 has the effect of prescribing the positional relationship between the shrinkable member 11 and the absorbent body 6 .

Among the applied hot melts, the hot melts 21 having a large width and strong adhesive strength are applied to three portions of the shrinkable member 11, namely, both ends in the width direction of the diaper and the central portion in the width direction that contacts the absorber. , parallel to the longitudinal direction of the diaper. The hot melt 20 is easily separated from the absorbent body 6 when force is applied to the diaper. On the other hand, the hot melt 21 is strongly adhered to the absorbent body 6 and will not peel off under the load assumed in normal usage.

With such a configuration, for example, as shown in FIG. It is easily peeled off from the absorber 6. On the other hand, since the hot melt 21 is strongly adhered to the absorbent body 6, it does not separate, and the shrinkable member is intermittently adhered to the absorbent body 6 in the width direction of the diaper.

As described above, the hot melt 21 is provided only on the absorbent core 6 and both ends of the shrinkable member 11 in the diaper width direction. When the shrinkable member 11 tries to shrink, the ends of the shrinkable member 11 in the width direction tend to approach the hot melt 21 applied to the absorbent body contacting portion at the center in the width direction, so that they are sandwiched between the pair of grooves 10 . The absorbent body 6 can easily stand up on the skin surface side.

FIG. 10 is a diagram showing another structure of the contraction member according to the embodiment. In this figure,
The hot melt 21 is applied to two portions of the shrinkable member 11 at both ends in the width direction of the diaper, and the hot melt 20 is applied to the absorber-contacting portion in the center in the width direction. The hot-melt applied to the central part in the widthwise direction in contact with the absorbent body may have an adhesive strength intermediate between that of the hot-melt 20 and the hot-melt 21 .

When the shrinkable member 11 tries to shrink, the ends of the shrinkable member 11 in the width direction tend to approach each other, so that the absorbent body 6 sandwiched between the pair of grooves 10 tends to stand up more strongly. Moreover, if the hot melt applied to the central portion in the width direction that abuts on the absorbent body remains adhered, it is possible to prevent the absorbent body 6 from bending in the direction opposite to the skin surface side.

FIG. 11 is a diagram showing another configuration of the contraction member according to the embodiment. In this figure, the shrinkable member 11 is not coated with the hot melt 20, but is coated with the hot melt 21 only. Even in such a configuration, when the shrinkable member 11 tries to shrink, the widthwise ends of the shrinkable member 11 tend to approach the hot melt 21 applied to the absorbent body contact portion at the center in the widthwise direction. The effect of facilitating the rise of the absorbent body 6 sandwiched between the grooves 10 toward the skin surface remains the same.

FIG. 12 is a diagram showing absorbent body adhesion positions of the diaper according to the embodiment. In the example of this figure, the adhesive lines of the hot melt 21 that do not separate from the shrinkable member 11 are intermittently provided from the pair of grooves 10 to the central side in the width direction. By intermittently providing the adhesive lines in this manner, the contractile force of the contractile member 11 effectively acts to bring the pair of grooves 10 closer together, and the absorbent body 6 tends to swell toward the skin surface.

Although not shown, the shrinkable member 11, like the absorbent body 6, is the back sheet 5 existing on the non-skin surface side of the shrinkable member 11 (when the shrinkable member 11 is arranged on the skin surface side of the absorbent body 6, , and the top sheet 7) may be intermittently adhered by hot melt or the like. In particular, when the shrinkable member 11 is provided between the absorbent body 6 and the backsheet 5, if a non-bonded portion is also provided on the non-skin surface side of the shrinkable member 11, the rigidity of the central portion in the width direction of the diaper is reduced. The absorber 6 is easily raised in the central portion in the width direction.

When the shrinkable member 11 is provided between the back sheet 5 on the non-skin side of the absorbent body 6 and the back sheet 5 and the shrinkable member 11, a pair of adhesives are attached to both ends of the shrinkable member 11 in the width direction. It may be done by forming a part. In addition, when the shrinkable member 11 is provided between the top sheet 7 on the skin side of the absorbent body 6 and the back sheet 5 and the absorbent body 6, the adhesion between the back sheet 5 and the absorbent body 6 is performed at the position where the shrinkable member 11 exists with the absorbent body 6 sandwiched therebetween. This may be done by forming a pair of adhesive portions at both ends. With this configuration, it is not necessary to deform the back sheet 5 and the cover sheet 4 in the same direction when the stretchable member 11 raises the absorbent body 6 to the skin surface side. Therefore, it is not necessary to apply a strong elastic force to the elastic member 11 to deform all the surrounding laminated members.

As described above, the features of the present invention have been described in the embodiments, but the content of the present invention is not limited to the above embodiments. For example, in the above-described embodiment, the hot melt 21 having a strong adhesive force was realized by increasing the amount of the hot melt applied than the hot melt 20. It can also be realized by using hot melt.

Reference Signs List 1 Inner pad 2 Leg gathers 3R, 3L Three-dimensional gathers 3BR, 3BL Elastic body 4 Cover sheet 5 Back sheet 6 Absorbent body 6A Core wrap sheet 7 Top sheet 8R , 8L... Side sheet 10... Pair of grooves 11... Shrink tape 20... Hot melt 21... Hot melt

Claims (11)

an absorber that absorbs bodily fluids discharged from the wearer;
a pair of grooves provided in the skin side crotch portion of the absorbent body and extending in the longitudinal direction of the absorbent body;
a contracting member disposed on the non-skin surface side of the absorbent body and inside the pair of grooves in the width direction and biased to contract inward in the width direction of the absorbent body;
with
The shrinkable member adheres to the inside of the pair of grooves in the width direction of the absorbent body at both ends in the width direction in the stretched state, and the pair of grooves approaches the grooves in the contracted state so that the absorbent body is placed on the skin side. lift to,
absorbent article. The pair of grooves extends toward the front body region of the absorbent body,
The contraction member is also arranged on the ventral side of the pair of grooves,
The absorbent article according to claim 1. The pair of grooves extends toward the back body region of the absorbent body,
The contraction member is also arranged on the dorsal side of the pair of grooves.
3. The absorbent article according to claim 1 or 2. The shrinkable member and the absorbent body are intermittently adhered to each other in the width direction of the absorbent body,
The absorbent article according to any one of claims 1-3. The shrinkable member and the absorber are bonded with a plurality of bonding lines,
The width of the adhesive line is thicker than the other adhesive lines at both ends of the shrinkable member in the width direction and at the central portion of the absorbent body.
The absorbent article according to any one of claims 1-4. The shrinkable member and the absorber are bonded with a plurality of bonding lines,
The width of the adhesive line is thicker than the other adhesive lines at both ends in the width direction of the shrinkable member,
The absorbent article according to any one of claims 1-4. The shrinkable member is arranged between the non-skin surface side of the absorbent body and the skin surface side of the cover sheet,
The cover sheet and the shrinkable member are also intermittently adhered to each other in the width direction of the cover sheet.
The absorbent article according to any one of claims 1-6. The shrinkable member is arranged between the non-skin surface side of the absorbent body and the skin surface side of the cover sheet,
The cover sheet and the shrinkable member are bonded to each other at positions corresponding to the widthwise ends of the shrinkable member and to the inner side of the pair of grooves in the widthwise direction to form a pair of bonded portions.
The absorbent article according to any one of claims 1-6. The pair of grooves are formed by reducing the basis weight of the absorbent body at the forming position,
The absorbent article according to any one of claims 1-8. The pair of grooves are formed by pressing the absorbent body at the formation position,
The absorbent article according to any one of claims 1-8. The pair of grooves are formed by slitting the absorbent body at the formation position,
The absorbent article according to any one of claims 1-8.

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