JP2023084086A - absorbent article - Google Patents

Abstract

To provide a technique which can suppress leakage of excrement from a gap between the skin of a wearer and three-dimensional gatherings when an absorbent article has the three-dimensional gatherings extending in a longitudinal direction at the end parts in a width direction of a top sheet.SOLUTION: An absorbent article according to one aspect of the present invention includes a length in a longitudinal direction and a length in a width direction orthogonal to the longitudinal direction and has an absorber which can absorb a discharged liquid of a wearer, a top sheet provided on a skin surface side of the absorber, and three-dimensional gatherings provided on parts of the top sheet overlapped with the end parts in the width direction of the absorber to extend in the longitudinal direction. The absorber has a high basis weight part in a central part in the width direction and low basis weight parts in the end parts in the width direction in the end parts in the longitudinal direction. In a plane view of the absorbent article, in overlapped parts of the top sheet overlapped with the low basis weight parts, the end parts in the longitudinal direction of the three-dimensional gatherings are provided.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to absorbent articles.

An absorbent article has been disclosed in which three-dimensional gathers extending in the longitudinal direction are provided at the ends of the top sheet in the width direction (for example, Patent Document 1). In the case of such an absorbent article, it is possible to prevent leakage of excretion (for example, urine, watery feces, etc.) on the top sheet to the outside.

JP 2018-068464 A

Even if the three-dimensional gathers are provided on the absorbent article, there is a possibility that a gap will occur between the wearer's skin and the three-dimensional gathers due to reasons such as the fact that the three-dimensional gathers and the wearer's skin do not come into surface contact. There is In such a case, there is a possibility that the discharged matter will leak through the gap.

In one aspect, the present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide an absorbent article having three-dimensional gathers extending in the longitudinal direction at the ends of the top sheet in the width direction. 2. To provide a technique capable of suppressing leakage of excrement from a gap between a wearer's skin and a three-dimensional gather.

In order to solve the above-mentioned problems, in the present invention, the ends of the three-dimensional gathers in the longitudinal direction are provided in the low basis weight portion of the absorbent body.

Specifically, an absorbent article according to one aspect of the present disclosure is an absorbent article having a length along a longitudinal direction and a length along a width direction orthogonal to the longitudinal direction, a liquid-absorbing absorbent, a top sheet provided on the skin side of the absorbent, and extending in the longitudinal direction of the top sheet in a region overlapping with the widthwise end of the absorbent. The absorber has a high basis weight portion at the widthwise central portion and a low basis weight portion at the widthwise end at the longitudinal end portions. The lengthwise ends of the three-dimensional gathers are provided in the overlapping portion of the top sheet that overlaps the low basis weight portion when the absorbent article is viewed from above.

Further, in the absorbent article according to the above aspect, the longitudinal end of the three-dimensional gathers may be provided at the widthwise end of the overlapping portion.

In addition, the absorbent article according to the above aspect includes a first bonding portion for bonding the overlapping portion and the longitudinal end portion of the three-dimensional gather, and a non-permeable adhesive portion provided on the non-skin surface side of the absorbent body. the absorbent body has an absorbent core capable of absorbing the discharged liquid; and a water-permeable sheet covering the absorbent core, and the water-impermeable sheet extends in the longitudinal direction to the Extending toward the ends in the longitudinal direction from the ends of the absorbent core, the first adhesive portion extends beyond the ends in the longitudinal direction of the absorbent core to the ends in the longitudinal direction of the absorber. may extend to

In addition, the absorbent article according to the above aspect extends in the width direction at the end of the absorbent body in the longitudinal direction, is provided on the non-skin surface side of the absorbent core, and extends in the thickness direction of the absorbent article. It further comprises a stretchable member overlapping with the core, and a predetermined layer laminated between the absorbent core and the stretchable member, wherein the predetermined layers are non-bonded in the region where the first adhesive portion is provided. Adhesion may be used.

Further, in the absorbent article according to the above aspect, the stretchable member is stretchable in the width direction in a region overlapping the absorber in the thickness direction or on the end side in the longitudinal direction of the absorber. The width of the first adhesive portion may be narrower than the width of the low basis weight portion.

Further, in the absorbent article according to the above aspect, the water-impermeable sheet may be folded back from the non-skin surface side of the absorbent body to the skin surface side at the widthwise end of the absorbent body.

In addition, in the absorbent article according to the one aspect described above, end sheets may be provided on the skin surface side of the ends of the three-dimensional gathers in the longitudinal direction.

Further, in the absorbent article according to the above aspect, the end sheet and the sheet-like member on the non-skin surface side of the end sheet are bonded to each other, and the second adhesion part is a spaced part separated from each other. It may further comprise a second adhesive portion arranged with a .

Moreover, in the absorbent article according to the one aspect described above, the high basis weight portion may extend with a substantially equal width in the longitudinal direction.

Further, in the absorbent article according to the above aspect, the absorbent body has an absorbent core and a water-permeable sheet that wraps the absorbent core, and in a worn state, a starting point is the width direction end of the absorbent core in the crotch region. You may stand up on the said skin surface side as.

Further, in the absorbent article according to the above aspect, the absorbent body has an absorbent core and a water-permeable sheet that wraps the absorbent core, and the absorbent core has a constriction that is constricted in the width direction of the crotch region. In the worn state, the narrowest part of the constriction of the absorbent core may be a bent end, and the outer side in the width direction may rise from the bent end.

In addition, in the absorbent article according to the above aspect, the absorbent core may rise toward the skin from a boundary between the high basis weight portion and the low basis weight portion when worn.

In addition, in the absorbent article according to the one aspect described above, the outer side in the width direction from the high basis weight portion of the absorbent core may be bent toward the skin surface when worn.

According to the present invention, when the absorbent article has three-dimensional gathers extending in the longitudinal direction at the ends of the top sheet in the width direction, exudates do not leak through the gap between the wearer's skin and the three-dimensional gathers. can be suppressed.

FIG. 1 is a perspective view of an adult underpants-type disposable diaper according to an embodiment. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a diagram schematically showing an unfolded and extended state of the diaper according to the embodiment. FIG. 4 is an example of a cross-sectional view of the diaper according to the embodiment. FIG. 5 is an example of a detailed view of the front body region of the diaper. FIG. 6 is an example of a cross-sectional view of the diaper according to the embodiment. FIG. 7 is an example of a cross-sectional view of a diaper according to Modification 2. FIG. FIG. 8 is an example of a cross-sectional view of a diaper according to Modification 3. As shown in FIG.

[Embodiment]
A diaper according to an embodiment of the present invention will be described below with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present disclosure is not limited to the configurations of these embodiments.

FIG. 1 is an example of a perspective view of an adult underpants-type disposable diaper (hereinafter simply referred to as "diaper") according to the embodiment. In the diaper, the longitudinal direction is the direction connecting the front body arranged to face the abdomen of the wearer and the back body arranged to face the back of the wearer. 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, when the diaper is worn by the wearer, the side facing the wearer's skin is the skin side, and the side opposite to the skin side 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. The diaper 1 has a length along the longitudinal direction and a lateral width along the width direction orthogonal to the longitudinal direction, and is worn around the wearer's crotch. In addition, the terms used in the present application regarding directions mean directions corresponding to the front, back, left, and right of the wearer when the diaper 1 is worn by the wearer. For example, in the present application, the lateral direction means a direction corresponding to the lateral direction of the wearer when the diaper 1 is worn by the wearer.

In the present embodiment, as an example of an absorbent article, a pants-type disposable diaper having a cylindrical structure having an opening for receiving the wearer's abdominal circumference and a pair of left and right openings through which the wearer's left lower leg and right lower leg are inserted. However, the "absorbent article" in the present application is not limited to pants-type disposable diapers for adults. As used herein, "absorbent articles" include pants-type disposable diapers for children. In addition, a tape fixed near one end of a sheet-shaped member that covers the wearer's crotch (genitals) from the front body to the back body is attached near the other end of the sheet-shaped member to form a cylindrical structure. Included are various forms of absorbent articles that can wrap around the waist and crotch, such as tape-type disposable diapers that form a .

The diaper 1 has a crotch region 1B that corresponds to the crotch region that covers the wearer's pubic region (crotch) when worn, and a region that corresponds to the front body around the waist of the wearer and is the abdomen side of the wearer. It has a front body region 1F for covering and a back body region 1R for covering the wearer's back side, which is a part corresponding to the back body around the waist of the wearer. Here, the front body region 1F is located on the front side of the crotch region 1B, and the back body region 1R is located on the rear side of the crotch region 1B. Since the diaper 1 in this embodiment is a pants-type disposable diaper, the left edge of the front body region 1F and the left edge of the back body region 1R are joined together, and the right edge of the front body region 1F and the back body are joined together. The right edges of region 1R are joined together. Therefore, in the diaper 1, a waist opening 2T is formed by the upper edge of the front body region 1F and the upper edge of the back body region 1R. In the diaper 1, a left leg opening 2L is formed on the left side of the crotch region 1B, which is not joined, and a right lower leg opening 2R is formed on the right side of the crotch region 1B. The diaper 1 is arranged such that the wearer's left lower leg is inserted through the left lower leg opening 2L, the wearer's right lower leg is inserted through the right lower leg opening 2R, and the wearer's torso is inserted into the torso opening 2T. When worn, the front body region 1F is arranged on the abdomen side of the wearer, the back body region 1R is arranged on the back side of the wearer, and the left lower leg opening 2L and the right lower leg opening 2R are arranged on the wearer's thighs. It is fixed to the wearer's body in a state surrounding the part. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can move freely 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, the diaper 1 has a left lower leg opening surrounding the thigh of the wearer's left lower leg in order to suppress formation of a gap serving as an outflow path for liquid between the diaper 1 and the wearer's skin. A three-dimensional gather 3BL is provided in 2L, a three-dimensional gather 3BR is provided in the lower right leg opening 2R surrounding the thigh of the wearer's right leg, and a waist gather 3R and a tummy gather 12 are provided in the region surrounding the waist circumference of the wearer. It is In addition, leg gathers 3LL and 3LR are provided at positions surrounding the roots of the wearer's legs. 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 thread rubber. Also, the leg gathers 3LL and 3LR prevent a gap from being created between the groin of the wearer's leg and the diaper 1.例文帳に追加Therefore, the liquid discharged from the wearer's pubic region is absorbed by the absorber of the diaper 1 without hardly leaking from the diaper 1 .

The diaper 1 can be used in combination with an inner pad (not shown). The inner pad is a generally rectangular absorbent article with an absorbent body to absorb exuded liquids. When the diaper 1 and the inner pad are used in combination, the inner pad is placed on the skin surface side of the diaper 1 so as to be in contact with the discharge holes of the wearer. The discharged liquid is first absorbed by the inner pad, and only the discharged liquid that could not be absorbed by the inner pad reaches the absorber of the diaper 1 and is further absorbed. Therefore, even when the amount of discharged liquid is large, leakage of the discharged liquid from the diaper 1 can be prevented. In addition, when the amount of discharged liquid is small and can be completely absorbed by the inner pad, only the inner pad needs to be replaced even if the discharged liquid is generated, which reduces the assistance cost. Moreover, the diaper 1 can be used for a long time.

FIG. 2 is an example of an exploded perspective view of the diaper 1 according to the embodiment. A diaper 1 has a cover sheet 4 and an inner cover sheet 5 . The cover sheet 4 and the inner cover sheet 5 are substantially hourglass-shaped (gourd-shaped) sheets that are bonded together to form the outer surface of the diaper 1, and have an end on the front body region 1F side and an end on the back body region 1R side. Other than that, they have the same shape. When worn by the wearer, the cover sheet 4 is laminated on the non-skin side of the wearer and the inner cover sheet 5 is laminated on the wearer side. Thread rubbers are provided between the cover sheet 4 and the inner cover sheet 5 to form the waist gathers 3R, the tummy gathers 12, and the leg gathers 3LL and 3LR. It should be noted that a stretchable member such as belt-like rubber can be appropriately selected instead of the thread rubber.

The cover sheet 4 and the inner cover sheet 5 can be made of, for example, a non-woven fabric made of a liquid-impermeable thermoplastic resin, in order to suppress leakage of discharged matter. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). Hereinafter, as a concept corresponding to the absorber 8 and the combination of the absorber 8 with the back sheet 6, the top sheet 9, and the side sheets 10L and 10R, the cover sheet 4 on which rubber threads are arranged and the inner cover sheet 5 are combined. It may be expressed as an exterior body.

The diaper 1 has a back sheet 6, an absorbent body 8, and a top sheet 9 which are laminated in order on the wearer-side surfaces of the cover sheet 4 and the inner cover sheet 5. As shown in FIG. The back sheet 6 is a substantially rectangular parallelepiped sheet having a length in the longitudinal direction reaching from the wearer's front body to the back body via the crotch and a predetermined width in the width direction orthogonal to the longitudinal direction. . Both the absorbent body 8 and the top sheet 9 are sheet-like members having a substantially rectangular appearance like the back sheet 6 . are stacked in order. The back sheet 6 is a sheet made of a liquid-impermeable thermoplastic resin in order to suppress leakage of discharged matter. Moreover, the top sheet 9 is a sheet-like member arranged on the wearer's skin surface side so as to cover the absorbent surface of the absorbent body 8 . This top sheet 9 has liquid permeability in part or in its entirety. Therefore, in the state in which the diaper 1 is worn, the liquid discharged from the wearer passes through the topsheet 9, which may come into contact with the wearer's skin, and enters the absorbent body 8, where it is absorbed. Examples of liquid-permeable sheets include woven fabrics, non-woven fabrics, and porous films. Moreover, the top sheet 9 may have hydrophilicity.

The absorbent body 8 has an absorbent core 8c made of a mat and a core wrap sheet 7 wrapping the absorbent core 8c. The absorbent core 8c 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. SAP (super absorbent polymer: Super
It has a structure in which a granular absorbent resin (polymer absorbent material) such as Absorbent Polymer is retained. When the absorbent core 8c absorbs the liquid discharged from the wearer, it swells the absorbent resin held in the gaps in the short fibers and holds the liquid in the short fibers. In this embodiment, the absorbent core 8c has an hourglass shape with a constricted center portion. The absorbent core 8c can have an appropriate shape according to the purpose. Examples of the shape of the absorbent core 8c include a rectangular shape, an elliptical shape, and various other shapes.

The core wrap sheet 7 is a thin liquid-permeable sheet, and by wrapping the absorbent core 8c with the core wrap sheet 7, the SAP of the absorbent core 8c described above is less likely to mix with other structures. Also, the shape loss of the absorbent core 8c is suppressed. The core wrap sheet 7 can be made of pulp fibers, and tissue paper can be used as an example. Although the core wrap sheet 7 may be a single sheet, the upper sheet is arranged on the wearer's skin side and the lower side is arranged on the wearer's non-skin side and wraps around the side surface of the absorbent core and the skin surface side. It may consist of two sheets of sheets. When the core wrap sheet 7 is composed of two sheets, the width direction end of the upper sheet is wrapped by other sheets (for example, the side sheets 10L and 10R, the back sheet 6, and the top sheet 9, which will be described later). can be Note that the absorbent body 8 is wrapped by the back sheet 6 and the top sheet 9, and these sheets can also prevent the absorbent body from losing its shape, so the core wrap sheet 7 can be omitted.

The backsheet 6, absorbent body 8, and topsheet 9 all extend from the front body region 1F to the back body region 1R. Therefore, when the back sheet 6, the absorbent body 8, and the top sheet 9 are laminated to cover the pubic region (crotch) of the wearer, both longitudinal ends of the back sheet 6, the absorbent body 8, and the top sheet 9 can be It is positioned on the ventral and dorsal sides of the In other words, the wearer's pubic region is covered with the absorber 8 from the wearer's ventral side to the dorsal side. Therefore, regardless of whether the wearer discharges the liquid to the outside of the body with the stomach facing downward or the posture with the back facing downward, the discharged liquid comes into contact with the absorbent body 8 via the top sheet 9 . will do.

The diaper 1 also has elongated band-like side sheets 10L and 10R for forming the three-dimensional gathers 3BL and 3BR described above. The side sheets 10L and 10R are provided on the long sides of the top sheet 9. As shown in FIG. The rubber threads 10L1 and 10R1 are adhered to the side sheets 10L and 10R while being stretched in the longitudinal direction. Therefore, the edge 4F4 of the cover sheet 4, which is the left edge of the front body region 1F, and the edge 4R4, which is the left edge of the back body region 1R, are joined together, and the cover sheet 4 is joined to the front body region 1F. When the diaper 1 in the completed state as shown in FIG. 10R is drawn in the longitudinal direction by the contractile force of rubber threads 10L1 and 10R1 and rises from top sheet 9 along folding lines 10L2 and 10R2. As a result, three-dimensional gathers 3BL and 3BR are formed to prevent liquid from flowing out from the left lower leg opening 2L and the right lower leg opening 2R. Although the method of joining the edges 4F4 and 4R4 and the edges 4F5 and 4R5 is not particularly limited, for example, heat sealing, high-frequency sealing, ultrasonic sealing, or the like can be used.

Furthermore, the diaper 1 further includes an end sheet 11F laminated on the wearer-side surface of the front body region 1F of the cover sheet 4 with the back sheet 6, the absorbent body 8, the top sheet 9, and the side sheets 10L and 10R interposed therebetween; and an end sheet 11R laminated on the wearer-side surface of the back body region 1R of the cover sheet 4. As shown in FIG. The end sheets 11</b>F and 11</b>R are strip-shaped sheets that are overlapped with the cover sheet 4 and the inner cover sheet 5 at one end side of the top sheet 9 in the longitudinal direction. The end sheets 11F and 11R are made of water-impermeable non-woven fabric, and mainly reinforce the cover sheet 4 and the inner cover sheet 5 at the waist contact portion of the diaper 1 . Adhesive is applied to each of the end sheets 11F and 11R, and the end sheets 11F and 11R are adhered to the inner cover sheet 5 by the adhesive. The end sheets 11F and 11R are arranged closer to the skin than the laminate formed by the back sheet 6, the absorbent body 8, the top sheet 9 and the side sheets 10L and 10R, and the edges of the laminate are in direct contact with the skin when worn. prevent people from feeling uncomfortable.

FIG. 3 is an example of a diagram schematically showing an unfolded and extended state of the diaper 1 according to the embodiment. FIG. 3(A) schematically shows the internal structure of the diaper 1 in the unfolded and stretched state when viewed from the left side. FIG. 3(B) schematically shows a plan view of the diaper 1 in an unfolded and stretched state. Note that the side seats 10L and 10R and the end seats 11F and 11R are not shown in FIG. 3(B). One end side of the cover sheet 4 is folded back at folding lines 4FF and 4RF shown in FIG. The waist gathers 3R described above are adhered to the front body area of the cover sheet 4 in a state where the rubber thread (rubber thread) 4F1 is stretched, and the rubber thread (rubber thread) 4R1 is stretched to the back body area of the cover sheet 4. It is formed by adhering in a state where it is attached. The rubber threads 4F1 and 4F2 are provided in this order from the side of the folding line 4FF along the folding line 4FF that forms the upper edge of the front body region 1F when folded back. Similarly, the tummy gather 12 is bonded to the front body region of the cover sheet 4 with the rubber thread 4F2 stretched, and is bonded to the back body region of the cover sheet 4 with the rubber thread 4R2 stretched. formed by Similarly to the rubber threads 4F1 and 4F2, the rubber threads 4R1 and 4R2 are also folded along the folding line 4RF, which forms the upper edge of the back body region when folded back, from the side of the folding line 4RF. are set in order.

Therefore, the rubber threads 4F1 and 4F2 are provided on the cover sheet 4 in such a direction that the longitudinal direction, which is the stretching direction, is the left-right direction of the diaper 1 . Also, the rubber threads 4R1 and 4R2 are provided on the cover sheet 4 in such a direction that the longitudinal direction, which is the stretching direction, is the left-right direction of the diaper 1. As shown in FIG. Therefore, when the edge 4F4 and the edge 4R4 are joined to each other, and the edge 4F5 and the edge 4R5 are joined to each other, the rubber threads 4F1 and 4F2 and the rubber threads 4R1 and 4R2 are formed substantially in an annular shape around the trunk opening 2T. , and exerts the function of contracting the waist opening 2T in the waist circumference direction. That is, the rubber threads 4F1, 4F2 and the rubber threads 4R1, 4R2 exert a contractile force to bring the diaper 1 into close contact with the wearer, thereby preventing formation of a gap between the diaper 1 and the wearer's waist circumference. The rubber thread 4F2 and the rubber thread 4R2 overlap the absorber 8 in part on the side of the crotch region 1B (details will be described later).

The thread rubbers 4F1 and 4R1 are provided so as to extend in the left-right direction along the upper edges of the front body region 1F and the back body region 1R shown in FIG. The thread rubbers 4F2 and 4R2 are provided in parallel with a predetermined interval. When the diaper 1 is worn, the rubber threads 4F1 and 4R1 tighten the waist circumference of the wearer above the rubber threads 4F2 and 4R2 relatively strongly. The thread rubbers 4F1 and 4R1 have the function of keeping the diaper 1 in close contact with the wearer to prevent the wearer from slipping out of position and preventing leakage of discharged liquid from the abdomen and back. The rubber threads 4F2 and 4R2 relieve the wearer's feeling of pressure caused by the contractile force of the rubber threads 4F1 and 4R1. Also, thread rubber 4
F2 and 4R2 suppress the displacement of the inner pad when using the inner pad.

Furthermore, the rubber thread 4F3 and the rubber thread 4R3 are adhered to the cover sheet 4 in a stretched state. The rubber thread 4F3 and the rubber thread 4R3 are elastic members provided in the region of the cover sheet 4 closer to the crotch region 1B than the rubber thread 4F2 and 4R2. However, the rubber threads 4F3 and 4R3 are curved in the direction of the crotch region 1B, unlike the other rubber threads that are bonded from the left end to the right end of the cover sheet 4 without bending. Since the rubber threads 4F3 and 4R3 are arranged in a curved manner in this way, the regions where the rubber threads 4F3 and 4R3 are arranged are such that the surroundings of the left lower leg opening 2L and the right lower leg opening 2R are in contact with the skin surface of the wearer. It has a function as leg gathers 3LL and 3LR that are brought into contact with each other.

The rubber thread 4F3 on the front body region 1F side crosses the absorbent body 8 in the width direction and is continuous in the width direction. The portion where the rubber thread 4F3 crosses the absorber 8 in the width direction corresponds to the vicinity of the wearer's pubic bone. The urethral opening of the wearer comes into contact with the skin side of the diaper 1 on the crotch side of the part where the elastic thread 4F3 crosses the absorbent body 8. As shown in FIG.

Further, in the region where the rubber thread 4F3 crosses the absorbent body 8, a non-bonded region 25 is provided where the inner cover sheet 5 and the back sheet 6 are not bonded. By providing the non-bonded area 25, the inner cover sheet 5 constituting the outer sheet and the absorbent body 8 are not bonded. In addition, in FIG. 3(B), the non-adhesive area 25 is surrounded by a rectangular dotted line.

On the other hand, the rubber thread 4R3 on the back body region 1R side overlaps with the widthwise outer side of the absorbent core 8c at the constricted portion of the hourglass-shaped absorbent core, but does not cross the absorbent body 8 in the widthwise direction. The arrangement area of the rubber thread 4R3 contacts the wearer's buttocks near the absorber 8. As shown in FIG. In the rear body region 1R, the diaper 1 is pressed more strongly than the front body region 1F due to the pressure applied to the wearer's buttocks. For this reason, the rubber thread 4R3 is not provided in the central portion of the absorbent body 8 in the width direction, and the ends of the absorbent body 8 in the width direction are urged to separate from each other. contact with appropriate adhesion force.

The cover sheet 4 is folded back along folding lines 4FF and 4RF to extend to the area where the rubber thread 4F1 and the rubber thread 4R1 are arranged, and the folded portion reinforces the area where the rubber thread 4F1 and the rubber thread 4R1 are arranged. . The end sheets 11F and 11R (see FIG. 2) are provided in areas where the rubber thread 4F2 and the rubber thread 4R2 where the cover sheet 4 folded back at the folding lines 4FF and 4RF does not extend. The placement area is reinforced.

In the present application, the state in which the sheets are overlapped is not limited to the state in which the sheets are entirely in contact with each other, but includes the concept in which the sheets partially overlap each other. For example, the end sheet 11</b>F is overlapped in such a manner that a portion of the back sheet 6 on one end side in the longitudinal direction touches a portion of the cover sheet 4 . Since the diaper 1 is formed by stacking the back sheet 6 and the top sheet 9 with the absorbent body 8 sandwiched therebetween, the cover sheet 4, the end sheets 11F and 11R, the inner cover sheet 5, and the side sheets 10L and 10R are stacked. , it can be said to have a laminate in which a plurality of these sheets are stacked.

FIG. 4 is an example of a cross-sectional view of the diaper according to the embodiment, taken along the width direction at the central portion in the longitudinal direction. The absorbent core 8c included in the absorber 8 has a high basis weight portion and a low basis weight portion. More specifically, when viewed from the skin side, the absorbent core 8c has an hourglass shape with a constriction in the crotch region 1B (see FIG. 2). The central portion in the width direction, specifically, the inner region of the imaginary extension line extending the constricted portion of the hourglass in the direction of both ends in the longitudinal direction is the high basis weight portion, and the other region (so-called ears of the absorber) is the low basis weight. It's part. The high basis weight part extends to a portion corresponding to the wearer's excretion hole and absorbs discharged liquid. In addition, the absorbent core 8c is reinforced in areas where pressure is likely to be applied when worn, thereby preventing deformation. The low basis weight part is provided in a portion that abuts on the wearer's buttocks when worn, and easily follows the wearer's body surface.

The high basis weight part extends with the same width from the abdominal end to the dorsal end of the absorbent core 8c. The high basis weight portion extends with the same basis weight over the entire extension portion.

In the absorbent core 8c, in addition to cellulose-based short fibers or hydrophilic-treated resin-based short fibers (hereinafter referred to as short fibers), a hydrophilic hydrophilic material having a crosslinked structure capable of absorbing and retaining water is provided. Particulate absorbent resins (SAP particles) such as superabsorbent polymers are included. When exudate is released from the wearer and penetrates into the absorbent core 8c, the particles of SAP absorb moisture while the short fibers temporarily retain the exudate and gradually expand to fix the exudate. . The fixed effluent does not move or flow back to the skin side. When SAP particles absorb water and swell, they sometimes clog the flow path of the discharged liquid (gel blocking phenomenon). Therefore, according to the design of the absorbent core 8c, it is possible to limit the places where the particles of SAP are arranged. When the absorbent core 8c is composed of a plurality of absorbent mats, the absorbent mats on which the SAP particles are arranged may be limited.

In this figure, the absorbent core 8c is wrapped in a water-permeable core wrap sheet 7. As shown in FIG. Furthermore, the core wrap sheet 7 is divided into an upper layer core wrap sheet 7f positioned on the wearer's skin side when worn and a lower layer core wrap sheet 7b positioned on the wearer's non-skin side when worn. The upper core wrap sheet 7f is adhered to the skin side of the absorbent core 8c with a hot-melt adhesive HM. The lower core wrap sheet 7b is adhered to the non-skin surface side of the absorbent core 8c with a hot-melt adhesive HM. Alternatively, the lower core wrap sheet 7b and the absorbent core 8c may be adhered with an easily peelable adhesive.

The core wrap sheet 7 has a rectangular appearance when it wraps around the absorbent core 8c, and serves to prevent the absorbent core 8c from losing its shape and prevent the internal structure of the absorbent core 8c from dissipating. Note that the core wrap sheet 7 is not essential, and its role can be replaced by covering the side surface of the absorbent core 8c with a back sheet 6, a top sheet 9, and side sheets 10L and 10R, which will be described later.

A plurality of hot-melt adhesives HM for bonding the core wrap sheet 7 and the top sheet 9 are provided and spaced apart from each other. Since the adhesive does not have water permeability, if the entire surfaces of the core wrap sheet 7 and the top sheet 9 are adhered, the inflow of the discharged liquid to the absorbent core 8c is blocked. Moreover, it is preferable that they are provided at sufficient intervals. With this configuration, the function of absorbing the discharged liquid of the diaper is not impaired. Moreover, by making most of the top sheet 9 a non-bonded portion, the degree of freedom of the top sheet 9 is improved, and the top sheet 9 easily conforms to the skin surface of the wearer when worn. Therefore, the feeling of wearing the diaper is improved.

A back sheet 6 is provided on the non-skin surface side of the absorbent body 8 . The back sheet 6 is a non-permeable film and has the function of preventing the discharged liquid absorbed by the absorbent 8 from seeping out to the cover sheet. In this embodiment, the backsheet 6 covers not only the non-skin side of the absorbent body 8 but also the side surfaces of the absorbent body 8 by being folded from the non-skin side to the side surfaces of the absorbent body 8, and further absorbs from the side surfaces. It overlaps with a part of the skin surface side of the absorbent body 8 by being folded on the skin surface side of the body 8 . The side surface of the absorbent core 8c in this embodiment has a low basis weight and tends to lose its shape. By covering, it is possible to suppress the deformation.

A hot-melt adhesive is applied so as to extend along the longitudinal direction of the diaper 1 between the part where the back sheet 6 is folded back to the skin side and the top sheet 9 . The folded portion of the back sheet 6 and the top sheet 9 are adhered by applying this hot melt adhesive. In addition, the impermeable portions 30L and 30R are formed by a hot-melt adhesive having impermeability. The impermeable portions 30L and 30R are formed from the non-skin surface side of the sidesheets 10L and 10R to the folded back portion of the backsheet 6 via the topsheet 9 when viewed in the thickness direction. The water-impermeable portions 30L and 30R prevent the discharged liquid that has permeated the top sheet 9 from leaking from the widthwise end portions of the absorbent body 8 along the folded portion of the back sheet 6 . The impermeable portions 30L and 30R are formed from the front body region to the back body region so as to extend in the longitudinal direction of the diaper 1. As shown in FIG. As a result, the diaper 1 can suppress lateral leakage from any position of the widthwise end of the absorbent body 8 .

Furthermore, in the present embodiment, the top sheet 9 provided on the skin surface side of the absorbent body 8 also covers the side surfaces of the absorbent body 8 and extends to both widthwise end portions of the absorbent body 8 on the non-skin surface side. The side sheets 10L and 10R also cover the side surfaces of the absorbent body 8 and extend to both widthwise end portions of the absorbent body 8 on the non-skin surface side. By covering the side surface of the absorbent body 8 with a plurality of sheets including the back sheet 6 in this way, it is possible to more effectively prevent the absorbent core 8c from losing its shape. In addition, since the side surface of the absorbent body 8 is covered with a plurality of sheets, the feel is improved, and the side surface of the absorbent body 8 contacts the wearer's skin, thereby reducing discomfort given to the wearer.

FIG. 5 is an example of a detailed view of the front body region 1F of the diaper 1. FIG. FIG. 5(A) is an example of a partially enlarged view of the front body region 1F of the diaper 1 in an unfolded state as viewed from the skin surface side. FIG. 5B is an example of a cross-sectional view taken along line AA in FIG. 5A. Although FIGS. 5A and 5B are diagrams of the front body region 1F, the rear body region 1R has the same configuration. Also, in FIG. 5A, illustration of the end sheets 11F and 11R is omitted. Moreover, the horizontal direction in FIG. 5B corresponds to the longitudinal direction of the diaper 1 .

As described above, the absorbent core 8c has a high basis weight portion in the central portion and low basis weight portions on both sides of the high basis weight portion in the width direction. Therefore, in FIG. 5A, the area overlapping the high basis weight portion of the absorbent core 8c in the thickness direction is indicated as a high basis weight area 21, and the areas overlapping the low basis weight portion of the absorbent core 8c are indicated as low basis weight areas 22L and 22R. there is

As shown in FIG. 5A, in the diaper 1, the side sheets 10L and 10R are attached to the portions of the top sheet 9 overlapping the widthwise ends of the low basis weight areas 22L and 22R. Such bonding regions 10LB and 10RB (an example of the “first bonding portion” of the present disclosure) between the top sheet 9 and the side sheets 10L and 10R are arranged in the longitudinal direction of the absorbent core as shown in FIG. 5(A). It extends to the edge of the core wrap sheet 7 beyond the edge of 8c. In addition, such bonding regions 10LB and 10RB are provided not on the whole of the low basis weight regions 22L and 22R but on some of them in the width direction. The side sheets 10L and 10R form the three-dimensional gathers 3BL and 3BR by being drawn in the longitudinal direction by the contractile force of the rubber threads 10L1 and 10R1 as described above.

Further, as shown in FIG. 5(B), in the diaper 1, rubber threads are provided on the exterior sheet. Specifically, a cover sheet 4 and an inner cover sheet 5 constituting an exterior sheet are laminated on the non-skin surface side of the absorbent body 8, and a thread rubber is provided between the cover sheet 4 and the inner cover sheet 5. 4F1, 4F2 and 4F3 are provided. A thread rubber may be provided between the inner cover sheet 5 and the absorbent body 8 .

A part of the rubber thread 4F2 that constitutes the tummy gather 12 extends in the width direction and is adhered in a stretched state to a region that overlaps with the longitudinal end of the absorber 8 of the exterior sheet. Further, a part thereof is also extended in the width direction and adhered in a stretched state to the region overlapping with the longitudinal end portion of the absorbent core 8c. Further, the rubber thread 4F2 is arranged on the front body region 1F side of the absorber 8 as well. Due to the biasing force of the rubber thread 4F2, the longitudinal end portions of the absorber 8 are biased so as to contract in the width direction when the absorbent body 8 is not worn. As a result, wrinkles (unevennesses) are formed at the longitudinal ends of the absorbent body 8, particularly at the longitudinal ends of the absorbent core 8c, and come into contact with the wearer's skin via the top sheet 9 and the end sheets 11F, 11R. Since the portion can be reduced, it is possible to improve the contact with the wearer's abdomen and back. In addition, since the absorbent core 8c of the absorbent body 8 is thicker and has higher rigidity than the core wrap sheet 7, the wrinkles are more uneven, and the longitudinal end portion of the absorbent body 8 provided with the adhesive HM1 is removed. can be made difficult to come into contact with the wearer's skin. A part of the rubber threads 4F2 and 4R2 described above is an example of the "elastic member" referred to in the present application.

Note that the ends of the absorbent core 8 in the longitudinal direction are stressed by the biasing force of the rubber thread 4F2, and the ends of the absorbent core 8c in the width direction may be crushed and easily deformed. However, as described above, by covering the side surfaces of the absorbent core 8 with the back sheet 6, the top sheet 9 and the side sheets 10L and 10R, the side surfaces of the absorbent core 8c are reinforced. It is possible to suppress the deformation in the part.

In addition, as shown in FIG. 5(B), the back sheet 6 (an example of the "water-impermeable sheet" of the present disclosure) extends in the longitudinal direction toward the front body region 1F from the ends of the absorbent core 8c. are doing. Further, at the width direction end portions of the top sheet 9 at such longitudinal end portions, adhesion areas 10LB and 10RB for bonding with the side sheets 10L and 10R are provided as shown in FIG. 5(A).

Further, as described above, in the present embodiment, the core wrap sheet 7 (an example of the "water-permeable sheet" of the present disclosure) is composed of the upper layer core wrap sheet 7f and the lower layer core wrap sheet 7b, and the absorbent core 8c is wrapped by the upper layer core wrap sheet 7f and the lower layer core wrap sheet 7b. When the absorbent core 8c is wrapped with the upper core wrap sheet 7f and the lower core wrap sheet 7b, the upper core wrap sheet 7f and the lower core wrap sheet 7b are adhered. , the upper core wrap sheet 7f and the lower core wrap sheet 7b are adhered with an adhesive HM1. Specifically, the upper core wrap sheet 7f and the lower core wrap sheet 7b extend beyond both ends in the longitudinal direction of the absorbent core 8c, and the extended portions of the upper core wrap sheet 7f and the lower core wrap sheet 7b , the upper core wrap sheet 7f and the lower core wrap sheet 7b are bonded together. A hot melt adhesive can be used as the adhesive HM1, for example. The adhesive HM1 is applied to rectangular regions having a predetermined length in the longitudinal direction and a predetermined length in the width direction (the same length as the width of the core wrap sheet 7) at both ends of the absorbent body 8 in the longitudinal direction. coated on the entire surface. Since the upper core wrap sheet 7f and the lower core wrap sheet 7b are thereby sealed, it is possible to further prevent SAP particles from escaping from the absorbent core 8c.

In this embodiment, a configuration is adopted in which the entire surface of the absorbent core 8c is covered with a plurality of core wrap sheets, ie, the upper layer core wrap sheet 7f and the lower layer core wrap sheet 7b, but the present invention is not limited to this configuration. For example, a configuration in which the entire surface of the absorbent core 8c is covered with one core wrap sheet may be employed, or a configuration in which only a portion of the absorbent core 8c is not covered with one or more core wrap sheets is employed. You may Regardless of which configuration is adopted, the core wrap sheets are adhered to each other at both ends in the longitudinal direction of the absorbent body 8 with the adhesive HM1, as in the present embodiment.

By the way, the adhesive HM1 cools and hardens after the diaper 1 is manufactured. Due to the hardened adhesive HM1, even if the top sheet 9 is interposed, the wearer's abdomen and back corresponding to the portions where the upper layer core wrap sheet 7f and the lower layer core wrap sheet 7b are adhered do not feel on the wearer's skin. It can get worse. In addition, at the ends in the longitudinal direction of the absorber 8, there is a step between the cover sheet 4 and the inner cover sheet 5 that constitute the outer sheet, and this step also reduces the contact with the wearer's abdomen and back. Sometimes. Therefore, in the present embodiment, end sheets 11F and 11R are laminated on the skin surface side of the top sheet 9 to cover the ends of the absorbent body 8 in the longitudinal direction.

The end sheets 11F and 11R are water-impermeable non-woven fabric sheets laminated on the skin side of the inner cover sheet 5 and the top sheet 9 and partly superimposed on the skin side of the longitudinal ends of the absorbent body 8. . The portions of the end sheets 11F and 11R that overlap the inner cover sheet 5 and the top sheet 9 are adhered to the inner cover sheet 5 and the top sheet 9 (an example of the "sheet-like member" of the present disclosure) with an adhesive HM2. A hot melt adhesive can be used as the adhesive HM2, for example. A plurality of adhesives HM2 are applied to the area where the end sheets 11F and 11R are arranged, including the area corresponding to the adhesive HM1. Each of the plurality of adhesives HM2 is linear (shorter in the longitudinal direction) than the adhesive HM1 and extends in the width direction. In addition, each of the plurality of adhesives HM2 is arranged at intervals in the longitudinal direction and separated from each other (an example of the "spaced portion" of the present disclosure). The end sheets 11F and 11R are an example of the "end sheets" referred to in the present application. Also, the portions where the end sheets 11F, 11R and the top sheet 9 are bonded with the adhesive HM2 are examples of the "second bonded portions" referred to in the present application.

Further, when the diaper 1 is worn, the absorbent core 8c in the crotch region 1B shown in FIG. This is because the narrowest portions 23L, 23R of the absorbent core 8c serve as a base for standing up, and the top sheet 9, the back sheet 6, and the side sheets 10L, 10R on the base stand up on the skin side. The narrowest portions 23L and 23R form a stable base because a plurality of sheets are laminated. Therefore, even if there is a distance from the widthwise end of the absorbent core 8c to the free ends of the three-dimensional gathers 3BL, 3BR in the crotch region, the three-dimensional gathers 3BL, 3BR can be stably brought into contact with the skin.

[Action/effect]
According to the diaper 1 as described above, the low basis weight areas 22L and 22R are positioned at the ends of the absorbent body 8 in the width direction as shown in FIG. 5(A). Therefore, when the wearer wears the diaper 1, the widthwise end portions of the absorber 8 easily conform to the wearer's skin surface. More specifically, in the worn state, the boundary between the narrowest parts 23L, 23R of the constriction of the absorbent core 8c and the high basis area 21 and the low basis area 22L, 22R is set as the bending edge, and the width is wider than the bending edge. The outside of the direction rises. In the front body region and the back body region, the widthwise outside of the high basis weight region 21 of the absorbent core 8c is bent toward the skin surface. Therefore, the outer sides of the side sheets 10L and 10R, the ends of which are respectively attached to the low-basis areas 22L and 22R, come close to the skin surface. Then, in this state, the rubber threads 10L1 and 10R1 are pulled in the longitudinal direction by the contractile force to form the three-dimensional gathers 3BL and 3BR. Therefore, gaps are formed between the wearer's skin and the three-dimensional gathers 3BL and 3BR, and leakage of excretion from the gaps is suppressed.

Further, according to the diaper 1 as described above, the rigidity of the bonding regions 10LB and 10RB between the top sheet 9 and the side sheets 10L and 10R is improved. Therefore, even if the rubber thread (for example, 4F1, etc.) on the longitudinal end side of the location where the absorbent body 8 is arranged shrinks, the adhesion regions 10LB and 10RB can resist the contraction force of the rubber thread. become. Therefore, the contraction force is suppressed from acting on the ends of the absorbent core 8c in the longitudinal direction. Therefore, the absorber 8 is prevented from losing its shape. In addition, since the adhesion regions 10LB and 10RB resist the shrinkage force of the rubber thread, the longitudinal ends of the three-dimensional gathers 3BL and 3BR are prevented from being twisted. Therefore, it is suppressed that the areas of the three-dimensional gathers 3BL and 3BR in surface contact with the wearer's skin are reduced. Therefore, gaps are formed between the wearer's skin and the three-dimensional gathers 3BL and 3BR, and leakage of excretion from the gaps is suppressed.

Further, as shown in FIG. 3, the inner cover sheet 5 constituting the exterior sheet and the absorber 8 are not adhered to each other in the portion where the rubber thread 4F3 crosses the absorber 8 in the width direction. 25 was set. Since the inner cover sheet 5 and the back sheet 6 are bonded to each other on the widthwise outer side of the non-bonded area 25, the back sheet 6 and the absorbent body 8 in the non-bonded area 25 are pulled widthwise outward by the rubber thread 4F3. By pulling the absorbent body 8 on the non-adhesive region 25 outward, the side sheets 10L, 10R outside the non-adhesive region 25, that is, the three-dimensional gathers 3BL, 3BR can easily stand on the skin surface side, and the discharge is next to the body. Leakage is suppressed.

Further, according to the diaper 1 as described above, as shown in FIG. 5A, the adhesive regions 10LB and 10RB overlap the low-basis regions 22L and 22R so that the widths of the low-basis regions 22L and 22R overlap. It is provided at the end of the direction. Therefore, in the width direction, there are low basis weight areas 22L and 22R that do not overlap with the bonding areas 10LB and 10RB so as to be sandwiched between the high basis area 21 and the bonding areas 10LB and 10RB. Therefore, when the rubber thread 4F2 forming the tummy gather shrinks, first, the high basis weight area 21 has improved rigidity, so that the shape can be maintained against the contraction force. On the other hand, the low basis weight areas 22L and 22R, which do not overlap with the bonding areas 10LB and 10RB, cannot resist the contraction force and bend with respect to the high basis weight area 21 . However, the bonding regions 10LB and 10RB, which are located further in the width direction than the bent low-basis-weight regions 22L and 22R, have improved rigidity and maintain a substantially planar shape. Therefore, crushing and hardening of the longitudinal ends of the absorbent core 8c due to the high basis weight area 21 and the adhesive areas 10LB and 10RB resisting the shrinkage force of the rubber thread 4F2 is suppressed. In addition, the low weight areas 22L and 22R that do not overlap with the adhesive areas 10LB and 10RB are bent, thereby allowing the absorber 8 to bend along the curves of the wearer's skin.

By the way, in order to prevent the longitudinal ends of the absorbent core 8c from being crushed and hardened by the contractive force of the rubber thread 4F2, the size of the absorbent body 8 in the longitudinal direction is reduced, or the elastic thread 4F2 is reduced. By reducing the number of arranged in the longitudinal direction, the rubber thread 4F2 and the absorber 8 may be constructed so as not to overlap in the thickness direction. According to such a structure, it is possible to suppress the contraction force of the rubber thread 4F2 from being transmitted to the longitudinal ends of the absorbent core 8c. considered to be controllable. However, in the case of such a structure, it is conceivable that the absorption performance and the performance of the tummy gather are lowered. On the other hand, according to the diaper 1 as described above, it is possible to prevent the end portions of the absorbent core 8c in the longitudinal direction from being crushed and hardened by the contractile force of the rubber thread 4F2 without causing such deterioration in performance.

Further, according to the diaper 1 as described above, the end sheets 11F and 11R are laminated on the skin surface side of the top sheet 9 to cover the ends in the longitudinal direction of the absorbent body 8 as shown in FIG. 5(B). As a result, the hardened adhesive HM1 and the steps at the ends of the absorbent body 8 in the longitudinal direction come into contact with the wearer's skin via the top sheet 9 and the end sheets 11F and 11R. It can improve the feel of the skin on the back. In addition, since the end sheets 11F and 11R reinforce the bonded portion between the core wrap sheets 7f and 7b, it is possible to further prevent SAP particles from escaping from the absorbent core 8c. Furthermore, assuming that each of the plurality of adhesives HM2 is separated from each other, the hardened adhesive HM2 is provided in the regions where the end sheets 11F and 11R including the region corresponding to the adhesive HM1 are arranged. Also, the area of the portion where the adhesive HM2 is provided becomes small due to the presence of the non-bonded portion between the adhesives HM2. In addition, the end sheets 11F and 11R become relatively movable with respect to the top sheet 9 at the non-bonded portions. As a result, it is possible to further improve the contact with the wearer's abdomen and back. In addition, transmission of the hardness of the adhesive regions 10LB and 10RB to the wearer's skin is alleviated.

FIG. 6 is an example of a cross-sectional view of the diaper 1 with the three-dimensional gathers 3BL and 3BR standing up. 6 is a cross-sectional view of the diaper 1 cut along the width direction at the center in the longitudinal direction. When the rubber threads 10L1 and 10R1 shrink in the longitudinal direction, the portions of the side sheets 10L and 10R on which the rubber threads 10L1 and 10R1 are provided stand up from the top sheet 9 with the ends of the impermeable portions 30L and 30R as standing lines. The end portions of the impermeable portions 30L and 30R, which are standing lines, correspond to the folding lines 10L2 and 10R2 shown in FIG. In addition, the portions of the side sheets 10L and 10R provided with the rubber threads 10L1 and 10R1 are provided with creases in advance, so that the three-dimensional gathers 3BL and 3BR are opened outward in the width direction as shown in FIG. Stand up in the shape of

In the diaper 1 according to the present embodiment, when worn, the narrowest portions 23L and 23R of the constrictions of the absorbent core 8c are folded ends, and the outer side in the width direction rises from the folded ends. When the diaper 1 having such a configuration is worn, the outer side in the width direction of the bent ends rises toward the skin from the bent ends. In FIG. 6 , the bent end is shown as a starting point to rise at a right angle, but in reality, the bent end is a starting point and the outer side in the width direction gradually rises. In the front body area and the back body area as well, the boundary between the high-basis area 21 and the low-basis areas 22L and 22R is the starting point, and the outer side in the width direction rises gradually. The diaper 1 can be brought into contact with the wearer with the free end sides of the three-dimensional gathers 3BL and 3BR. As a result, the diaper 1 can suppress leakage of excrement from the gaps between the wearer's skin and the three-dimensional gathers 3BL and 3BR.

[Modification 1]
As shown in FIG. 5A, the bonding regions 10LB and 10RB are provided at the widthwise ends of the low basis weight regions 22L and 22R in the width direction. It may be provided in an area other than the part. Also, the width of the bonding regions 10LB and 10RB may be equal to or wider than the width of the low basis weight regions 22L and 22R. Also, the side sheets 10L, 10R and the top sheet 9 may be fixed to each other in the adhesion regions 10LB, 10RB by a fixing method other than adhesive (such as welding). Further, at the ends of the absorber 8 in the longitudinal direction, the thread rubber such as 4F2 may not be provided in the thickness direction. Also, the end sheets 11F and 11R may not be provided. Also, each of the plurality of adhesives HM2 may be arranged continuously without any space in the longitudinal direction.

[Modification 2]
Next, the diaper 1 according to Modification 2 of the present embodiment will be described. FIG. 7 is a cross-sectional view of the diaper 1 cut along the width direction on the side of the front body region where the absorbent core 8c is not constricted. In this modified example, the configuration of the front body region will be described, but the diaper 1 according to this modified example also has the same configuration of the back body region. The absorbent core 8c has a high basis weight area 21 and low basis weight areas 22L and 22R provided at the center in the width direction in the front-rear direction of the constricted portion. In this modification, the high-weight area 21 is thicker than the low-weight areas 22L and 22R. The high basis weight area 21 also extends to the crotch area and has a uniform thickness in the longitudinal direction. The low basis weight areas 22L and 22R form widened areas that spread outward in the width direction from the constricted portion of the crotch area, and have a lower basis weight of pulp than the high basis area 21. As shown in FIG.

When the diaper 1 having such a configuration is worn, it rises on the skin surface side starting from the boundary between the high-weight area 21 and the low-weight areas 22L and 22R. In addition, as shown in FIG. 3(B), there are narrowest portions 23L, 23R of the absorbent core 8c on the crotch region side extension line of the boundary between the high basis weight region 21 and the low basis weight regions 22L, 22R. is provided. For this reason, the diaper 1
Starting from the boundary and the narrowest portions 23L, 23R of the absorbent core 8c, the outer sides in the width direction rise from these to the skin surface side. When the diaper 1 is worn, the outer sides in the width direction of the absorbent core 8c from the low basis weight areas 22L and 22R are bent toward the skin surface. This configuration also makes it easy for the diaper 1 to bring the free ends of the three-dimensional gathers 3BL and 3BR into contact with appropriate positions on the wearer's skin.

Further, as shown in FIG. 7, the non-skin surface side of the high basis weight area 21 of the absorbent core 8c is adhered to the core wrap sheet 7 with a hot-melt adhesive HM3. Therefore, the rigidity of the non-skin surface side of the high basis weight area 21 can be further increased. Since the hot-melt adhesive is not applied to the non-skin side of the low-basis areas 22L and 22R, the low-basis areas 22L and 22R are likely to bend toward the skin side starting from the boundary with the high-basis area 21. Become. In order to make the low-basis areas 22L and 22R easy to bend toward the skin side, at least the hot-melt adhesive should not be applied to the boundary side between the low-basis areas 22L and 22R and the high-basis area 21.

[Modification 3]
Next, the diaper 1 according to Modification 3 of the present embodiment will be described. FIG. 8 is a cross-sectional view when the diaper 1 is cut along the width direction on the front body region side. In this modified example, the configuration of the front body region will be described, but the diaper 1 according to this modified example also has the same configuration of the back body region. The absorbent core 8c included in the absorber 8 has a high basis weight area 21 and low basis weight areas 22L and 22R shown in FIG.

The absorbent core 8c is flat on the wearer's skin side, and the high basis weight portion is formed by increasing the basis weight on the non-skin side. Moreover, the high basis weight part extends with the same width from the ventral end to the dorsal end of the absorbent core 8c. The high basis weight portion extends with the same basis weight over the entire extension portion. By forming the high basis weight part and the low basis weight part in this way, it is possible to suppress the appearance of a step due to the boundary between the high basis weight part and the low basis weight part on the skin surface side, and to prevent the level difference from giving discomfort to the wearer. be able to. The absorbent core 8c having such characteristics can be realized, for example, by laminating an hourglass-shaped upper absorbent mat 8a and a strip-shaped lower absorbent mat 8b having a width equal to or smaller than the constricted portion.

In this modified example, the absorbent core 8c is wrapped in a water-permeable core wrap sheet 7. As shown in FIG. Furthermore, the core wrap sheet 7 is divided into an upper layer core wrap sheet 7f positioned on the wearer's skin side when worn and a lower layer core wrap sheet 7b positioned on the wearer's non-skin side when worn. The upper layer core wrap sheet 7f is adhered to the upper layer absorbent mat 8a. The lower layer core wrap sheet 7b is adhered to the lower layer absorbent mat 8b. However, the lower core wrap sheet 7b is not provided along the non-skin surface side of the upper absorbent mat 8a. In other words, the non-skin surface side of the upper absorbent mat 8a and the lower core wrap sheet 7b are non-bonded. For this reason, in the absorbent body 8, there are guide holes between the lower layer core wrap sheet 7b and the lower layer core wrap sheet 7b at positions further outside the width direction end portions of the lower layer absorbent mat 8b and where the upper layer absorbent mat 8a extends. 8s is formed. In addition, thread rubbers 4F2 and 4R2 are arranged in the non-skin-surface-side region overlapping with the guide hole 8s in the thickness direction. Further, the upper absorbent mat 8a and the lower core wrap sheet 7b are examples of the "predetermined layer" of the present disclosure.

Alternatively, the lower layer core wrap sheet 7b and the upper layer absorbent mat 8a may be adhered with an easily peelable adhesive. As a specific example, the width of the adhesive that adheres the lower core wrap sheet 7b and the lower absorbent mat 8b is made wider than the width of the lower absorbent mat 8b, and only the ends of the adhesive adhere to the upper absorbent mat 8a. You may make it adhere|attach with a skin surface side.

The lower core wrap sheet 7b and the upper absorbent mat 8a bonded with the adhesive are discharged when the lower absorbent mat 8b absorbs water and swells, or when the lower core wrap sheet 7b and the upper absorbent mat 8a are discharged. When the liquid flows in, it is peeled off, and as a result, the guide hole 8s is formed between the lower layer core wrap sheet 7b and the upper layer absorbent mat 8a. By the way, if the flow guide holes 8s are formed even when the diaper 1 does not absorb water and the flow guide holes 8s are unnecessary, the flow guide holes 8s may cause the absorbent core 8c to lose its shape. However, if the guide holes 8s are formed only when the absorbent core 8c absorbs water as described above, the guide holes 8s can be formed only when necessary.

The core wrap sheet 7 has a rectangular appearance when it wraps around the absorbent core 8c, and serves to prevent the absorbent core 8c from losing its shape and prevent the internal structure of the absorbent core 8c from dissipating. Note that the core wrap sheet 7 is not essential, and its role can be replaced by covering the side surface of the absorbent core 8c with a back sheet 6, a top sheet 9, and side sheets 10L and 10R, which will be described later.

A plurality of bonding portions are provided between the core wrap sheet 7 and the top sheet 9, and are separated from each other. Since the adhesive does not have water permeability, if the entire surfaces of the core wrap sheet 7 and the top sheet 9 are adhered, the inflow of discharged liquid into the absorbent core 8c is inhibited. It is preferable that they are provided with a sufficient interval. With this configuration, the function of absorbing the discharged liquid of the diaper is not impaired. Moreover, by making most of the top sheet 9 a non-bonded portion, the degree of freedom of the top sheet 9 is improved, and the top sheet 9 easily conforms to the skin surface of the wearer when worn. Therefore, the feeling of wearing the diaper is improved.

A back sheet 6 is provided on the non-skin surface side of the absorbent body 8 . The back sheet 6 is a non-permeable film and has the function of preventing the discharged liquid absorbed by the absorbent 8 from seeping out to the cover sheet. In this modification, the backsheet 6 covers not only the non-skin side of the absorbent body 8 but also the side surfaces of the absorbent body 8 by being folded from the non-skin side to the side surfaces of the absorbent body 8, and further absorbs from the side surfaces. By being folded on the skin side of the body 8, it overlaps with a part of the skin side of the absorbent body 8 and is adhered with a hot-melt adhesive. The side surface of the absorbent core 8c in this modified example has a low basis weight and tends to lose its shape. By covering, it is possible to suppress the deformation.

Furthermore, in this modification, the top sheet 9 provided on the skin surface side of the absorbent body 8 also covers the side surfaces of the absorbent body 8 and extends to both ends in the width direction on the non-skin surface side of the absorbent body 8 . The top sheet 9 is adhered to the side sheets 10L, 10R with a hot melt adhesive HM. The side sheets 10L and 10R also cover the side surfaces of the absorbent body 8 and extend to both widthwise end portions of the absorbent body 8 on the non-skin surface side. By covering the side surface of the absorbent body 8 with a plurality of sheets including the back sheet 6 in this way, it is possible to more effectively prevent the absorbent core 8c from losing its shape. In addition, since the side surface of the absorbent body 8 is covered with a plurality of sheets, the feel is improved, and the side surface of the absorbent body 8 contacts the wearer's skin, thereby reducing discomfort given to the wearer.

Also in the diaper 1 according to the present modification, as shown in FIG. 5B, part of the rubber thread 4F2 forming the tummy gathers 12 is separated from the longitudinal ends of the absorbent core 8c in the thickness direction. located in overlapping areas. Further, the non-skin surface side of the upper absorbent mat 8a and the lower core wrap sheet 7b are not adhered to each other. Therefore, direct transmission of the contractile force of the rubber thread 4F2 to the absorbent core 8c is suppressed. Therefore, contraction of the absorbent core 8c is suppressed. Therefore, the end portion of the absorbent core 8c is prevented from losing its shape. In addition, since the non-skin surface side of the upper absorbent mat 8a and the lower core wrap sheet 7b are non-bonded, curing of the non-bonded portion by the adhesive is suppressed. Therefore, even when the portion of the cover sheet 4 that overlaps the non-adhesive portion is touched from the non-skin side, the decrease in feel to the touch is suppressed. In addition, since the hardening of the non-bonded portion is prevented, the portion of the top sheet 9 that overlaps the non-bonded portion in the thickness direction can be easily erected on the skin side with respect to the high basis weight area 21 . The non-bonded portion is not limited to the portion between the non-skin surface side of the upper absorbent mat 8a and the lower core wrap sheet 7b, but may be the interlayer portion between the absorbent core 8c and the rubber thread 4F2.

The embodiments and modifications disclosed above can be combined.

1B: crotch region 1F: front body region 1R: back body region 2L: left lower leg opening 2R: right lower leg opening 2T: trunk opening 3BL, 3BR: three-dimensional gathers 3LL, 3LR: leg gathers 3R: waist gathers 4: cover sheet 4F1, 4F2, 4F3, 4R1, 4R2, 4R3: Rubber thread 4F4, 4F5, 4R4, 4R5: Edges 4FF, 4RF: Folding line 5: Inner cover sheet 6: Back sheet 7: Core wrap sheet 8: Absorbent body 8a: Upper layer Absorbent mat 8b : Lower layer absorbent mat 8c : Absorbent core 8s : Guide hole 9 : Top sheet 10L : Side sheet 10L1 : Rubber thread 10L2 : Folding line 10LB : Adhesive region 10R : Side sheet 10R1 : Rubber thread 10R2 : Folding line 10RB : Adhesive regions 11F, 11R: End sheet 21: High basis weight region 22L: Low basis weight region 22R: Low basis weight regions 23L, 23R: Narrowest portion 25: Non-adhesive regions 30L, 30R: Non-permeable portions HM, HM1, HM2, HM3: glue

Claims (13)

An absorbent article having a length along a longitudinal direction and a length along a width direction orthogonal to the longitudinal direction,
an absorber capable of absorbing the wearer's discharge;
a top sheet provided on the skin surface side of the absorbent body;
a three-dimensional gather provided so as to extend in the longitudinal direction on the top sheet in a region overlapping the width direction end of the absorbent body,
The absorbent body has a high basis weight portion at the widthwise central portion and a low basis weight portion at the widthwise end at the longitudinal end portions,
The longitudinal end of the three-dimensional gathers is provided in an overlapping portion of the top sheet that overlaps with the low basis weight portion when the absorbent article is viewed in plan.
absorbent article. The longitudinal end of the three-dimensional gather is provided at the widthwise end of the overlapping portion,
The absorbent article according to claim 1. a first bonding portion for bonding the overlapping portion and the longitudinal end portion of the three-dimensional gather;
a water-impermeable sheet provided on the non-skin surface side of the absorber,
The absorbent body has an absorbent core capable of absorbing the discharged liquid and a water-permeable sheet covering the absorbent core,
The water-impermeable sheet extends in the longitudinal direction toward the ends of the absorbent core in the longitudinal direction,
The first adhesive part extends beyond the longitudinal end of the absorbent core to the longitudinal end of the absorbent body,
The absorbent article according to claim 1 or 2. a stretchable member extending in the width direction at the end portion of the absorbent body in the longitudinal direction, provided on the non-skin surface side of the absorbent core, and overlapping the absorbent core in the thickness direction;
A predetermined layer laminated between the absorbent core and the elastic member,
In the region where the first bonding portion is provided, the predetermined layers are non-bonded.
The absorbent article according to claim 3. The stretchable member is provided so as to stretch in the width direction in a region overlapping the absorber in the thickness direction or on the end side in the longitudinal direction of the absorber,
The width of the first adhesive portion is narrower than the width of the low basis weight portion,
The absorbent article according to claim 4. The water-impermeable sheet is folded back from the non-skin surface side of the absorbent body to the skin surface side at the widthwise end of the absorbent body,
The absorbent article according to claim 3. An end sheet is provided on the skin surface side of the end of the three-dimensional gather in the longitudinal direction,
The absorbent article according to claim 1 or 2. a second bonding portion for bonding the end sheet and a sheet-like member on the non-skin surface side of the end sheet, wherein the second bonding portion is arranged with a spaced apart portion spaced apart from each other; further prepare,
The absorbent article according to claim 7. The high basis weight portion extends with a width substantially equal to the longitudinal direction,
The absorbent article according to claim 1 or 2. The absorbent body has an absorbent core and a water-permeable sheet wrapping the absorbent core,
In the worn state, the absorbent core in the crotch region rises toward the skin surface from the widthwise end of the absorbent core,
The absorbent article according to claim 1 or 2. The absorbent body has an absorbent core and a water-permeable sheet wrapping the absorbent core,
The absorbent core has a constriction that is constricted in the width direction of the crotch region,
In the worn state, the narrowest part of the constriction of the absorbent core is a bent end, and the outer side in the width direction rises from the bent end,
The absorbent article according to claim 1 or 2. In the wearing state, the absorbent core rises on the skin surface side with the boundary between the high basis weight portion and the low basis weight portion as a starting point,
12. The absorbent article according to claim 11. In the worn state, the outer side in the width direction of the high basis weight portion of the absorbent core is bent toward the skin surface.
13. The absorbent article according to claim 12.

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