CN219354400U

CN219354400U - Absorbent article and absorbent article package

Info

Publication number: CN219354400U
Application number: CN202222753577.2U
Authority: CN
Inventors: 金田悠太郎
Original assignee: Oji Holdings Corp
Current assignee: Oji Holdings Corp
Priority date: 2021-10-22
Filing date: 2022-10-19
Publication date: 2023-07-18
Anticipated expiration: 2032-10-19

Abstract

The utility model provides an absorbent article and an absorbent article package. An absorbent article (1) having a length along a longitudinal direction and a width along a width direction orthogonal to the longitudinal direction, comprising: an absorber (8) comprising an absorbent core (8 c) and a core wrap sheet (7); a top sheet (9) disposed on the skin surface side of the absorber (8); and a water-impermeable back sheet (6) which is disposed on the non-skin surface side of the absorber (8). The absorbent core (8 c) is in an hourglass shape including a narrowed portion in a crotch portion and extending in the longitudinal direction. The core wrap sheet (7) covers the absorbent core (8 c), and is bonded to the absorbent core (8 c) at least on the skin surface side of the absorbent core (8 c). The top sheet (9) has a water permeable area.

Description

Absorbent article and absorbent article package

Technical Field

The present utility model relates to an absorbent article and an absorbent article package.

Background

As a diaper for an absorbent article, a diaper having an absorber that absorbs discharged liquid is known (japanese patent application laid-open No. 2018-140067).

Disclosure of Invention

The absorbent body extends along the midline of the wearer from the front region to the back region when the diaper is worn. On the other hand, the position of the excretory opening of the wearer is roughly determined, and the excretory liquid is liable to stay in a specific portion of the absorbent body. In the portion where the discharged liquid stays, the amount of the discharged liquid sometimes exceeds the absorption capacity of the absorber in the portion to be insufficiently absorbed or to flow back to the skin surface of the wearer. Even in such a case, the absorbent body as a whole has an absorption capacity capable of sufficiently absorbing the discharged liquid, but there is a problem that the discharged liquid is not dispersed and the absorption capacity of the absorbent body cannot be exerted.

The purpose of the present utility model is to provide an absorbent article that can efficiently exhibit the absorption capacity of an absorber.

In order to solve the above problems, in the present utility model, an absorbent core is bonded to a core wrap sheet on the skin surface side of the absorbent core.

The utility model according to claim 1 is an absorbent article. The absorbent article has a length along a longitudinal direction and a width along a width direction orthogonal to the longitudinal direction. The absorbent article includes: an absorbent body comprising an absorbent core and a core wrap sheet; a top sheet disposed on the skin surface side of the absorber; and a water-impermeable backsheet disposed on the non-skin surface side of the absorber. The absorbent core has an hourglass shape including a narrowed portion in a crotch portion thereof and extending in the longitudinal direction, and the core wrap sheet covers the absorbent core and is bonded to the absorbent core at least on a skin surface side of the absorbent core. The topsheet has a water permeable region.

In the absorbent article, the absorbent core may include an upper layer absorbent pad disposed on the skin surface side and a lower layer absorbent pad disposed on the non-skin surface side with respect to the upper layer absorbent pad. The core wrap sheet may be bonded to the underlying absorbent pad at least on the non-skin side of the absorbent core, and may cover the absorbent core. The lower layer absorbent pad may be located inside the upper layer absorbent pad in the width direction in a case where the absorber is viewed in plan.

In the absorbent article, the core wrap sheet may be not bonded to the non-skin-side surface of the upper absorbent pad in a region directly opposed to the non-skin-side surface.

In the absorbent article, the non-skin-side surface of the core wrap sheet and the absorbent core may be peeled off more easily than the skin-side surface of the core wrap sheet and the absorbent core when a force for pulling the core wrap sheet away from the absorbent core is applied.

The absorbent article may further include a 1 st stretchable member, wherein the 1 st stretchable member is disposed in a region overlapping the absorbent core, and applies a force to the absorbent core from the end in the width direction so that the absorbent core is along the skin surface of the wearer.

In the absorbent article, the water permeable region of the top sheet may be wider at the longitudinal end of the absorber than at the widthwise end of the lower absorbent pad, and may be narrower than at the widthwise end of the upper absorbent pad.

In the absorbent article, the absorbent core may contain particles of SAP as a super absorbent polymer, and the particle basis weight of the SAP of the lower absorbent pad may be lower than that of the upper absorbent pad.

In the absorbent article, the upper layer absorbent pad may contain particles of SAP as a superabsorbent polymer. The underlying absorbent pad may not contain particles of the SAP.

In the absorbent article, the upper layer absorbent pad may have a shape narrowed in the width direction in the crotch region. The lower absorbent pad may be rectangular. The width of the lower absorbent pad may be less than the width of the narrowed portion of the upper absorbent pad.

The absorbent article further comprises: an outer body disposed on a non-skin surface side of the back sheet; and a 2 nd stretchable member stretched in the width direction at a position closer to the non-skin surface side than the core wrap sheet at an outer side in the width direction of a portion of the outer body where the absorber is widened from a crotch region toward an end portion in the length direction.

In the absorbent article, the 2 nd stretchable member may be provided so as to traverse the absorbent body in the width direction on the front region side without being provided at the central portion of the absorbent body in the width direction on the rear region side. The extension region of the 2 nd telescoping member on the front body region side may correspond to a pubic portion of the wearer when worn.

The absorbent article may further include a side sheet covering the widthwise side surface of the absorber. The side sheet may be provided with a 3 rd stretchable member stretched and contracted in the longitudinal direction on the skin surface side of the absorbent body to form a three-dimensional gather.

In the absorbent article, the back sheet may be covered from the non-skin surface side of the absorber to the skin surface side via a side surface portion of the absorber at the end portion in the width direction of the absorber.

In the absorbent article, the 2 nd stretchable member may be configured to apply a force so that the outer body is brought into contact with the leg hole direction and the lower abdomen direction of the wearer. The 3 rd stretchable member may be configured to apply a force so that the absorber is brought into contact with the wearer in the front-rear direction. In the narrowed portion of the absorbent core, a deflector hole is formed between the absorbent core and the outer case, outside in the width direction of the absorbent core, and between the absorbent core and the outer case, due to the difference in the expansion and contraction direction between the 2 nd expansion member and the 3 rd expansion member.

In the absorbent article, at least one of the top sheet and the side sheet may be a nonwoven fabric sheet. The back sheet may be covered with the nonwoven fabric sheet at a side surface portion of the absorber.

In the absorbent article, the core wrap sheet may be bonded to the upper layer absorbent pad. The core wrap sheet may be bonded to the underlying absorbent pad. The upper layer absorbent pad and the lower layer absorbent pad may be non-adhesive.

The utility model according to claim 2 is an absorbent article package. The absorbent article package includes a plurality of the absorbent articles described above. The absorbent article is packed between a 1 st pack including the 1 st absorbent article having a 1 st size and a 2 nd pack including the 2 nd absorbent article having a 2 nd size, and the shape and the size of the absorbent body are the same.

According to the present utility model, an absorbent article including an absorber capable of efficiently exhibiting absorption capacity can be realized.

Drawings

Features, advantages, and technical and industrial significance of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings, in which like reference numerals denote like elements, and in which:

fig. 1 is an external perspective view of a diaper according to an embodiment.

Fig. 2 is an exploded perspective view of the diaper of the embodiment.

Fig. 3 is a view schematically showing a state in which the diaper of the embodiment is developed and extended.

Fig. 4 is a view schematically showing a cross-sectional configuration of a diaper of an embodiment.

Fig. 5 is a view showing an example of a gap formed when the diaper of the embodiment is worn.

Fig. 6 is a view schematically showing a state in which the diaper of embodiment 2 is developed and extended.

Fig. 7 is a view schematically showing a cross-sectional structure of the diaper of embodiment 2.

Fig. 8 is a view of the longitudinal end portion of the absorber as seen from the non-skin surface side.

Fig. 9 is a cross-sectional view schematically showing a diaper in which a force is applied near the longitudinal end portions of the absorbent body when worn.

Detailed Description

Hereinafter, a diaper according to an embodiment of the present utility model will be described with reference to the drawings. The following embodiments are examples, and the present utility model is not limited to these embodiments.

< embodiment 1 >

Fig. 1 is a perspective view of an adult pants-type disposable diaper (hereinafter, simply referred to as "diaper") according to an embodiment. In a diaper, a direction connecting a front body disposed to face an abdomen of a wearer and a rear body disposed to face a back is set as a longitudinal direction. The crotch portion disposed in the crotch (disposed opposite the crotch) of the wearer is located between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction). In addition, when the diaper is worn on a wearer, the side facing the skin of the wearer is referred to as the skin surface side, and the opposite side to the skin surface side is referred to as the non-skin surface side. The direction connecting the skin surface side and the non-skin surface side is referred to as a thickness direction, and the direction perpendicular to either the longitudinal direction or the thickness direction is referred to as a width direction. The case of viewing from the thickness direction is referred to as planar view. The diaper 1 has a length along the longitudinal direction and a width along the width direction orthogonal to the longitudinal direction, and is worn on the crotch of a wearer. The term "direction" used herein refers to a direction that coincides with the front, rear, left, and right of the wearer when the diaper 1 is worn on the wearer. For example, the term "right-left direction" as used herein refers to a direction that coincides with the right-left direction of the wearer when the diaper 1 is worn on the wearer.

In the present embodiment, as an example of the absorbent article, a pants-type disposable diaper having a tubular structure with an opening into which the abdominal region of the wearer enters and a pair of left and right openings through which the left and right lower limbs of the wearer pass is exemplified, but the "absorbent article" in the present application is not limited to pants-type disposable diapers for adults. The term "absorbent article" as used herein includes pants-type disposable diapers for children. Further, there are various absorbent articles such as a belt-type disposable diaper having a tubular structure, which is formed by attaching a belt fixed to a portion of the sheet-like member that covers the crotch (pudendum) of the wearer from the front body over the back body, to a portion of the sheet-like member that is adjacent to the other end portion of the sheet-like member, and which can cover the abdomen and crotch.

The diaper 1 has: a crotch region 1B, wherein the crotch region 1B is a portion corresponding to a crotch region that covers a pudendum (crotch) of a wearer in a worn state; a front body region 1F, the front body region 1F being a portion corresponding to a front body of a waist (japanese: trunk Zhou) of a wearer and covering an abdomen side of the wearer; and a back region 1R, the back region 1R being a portion corresponding to the back in the waist of the wearer and covering the back side of the wearer. Here, the front body region 1F is located on the front side of the crotch region 1B, and the rear body region 1R is located on the rear side of the crotch region 1B. Since the diaper 1 in the present embodiment is a pants-type disposable diaper, the left edge of the front body region 1F and the left edge of the rear body region 1R are joined to each other, and the right edge of the front body region 1F and the right edge of the rear body region 1R are joined to each other. Therefore, in the diaper 1, the trunk opening portion 2T is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R. In the diaper 1, a left leg opening 2L is formed in a left portion of the crotch region 1B where the above-described joining is not performed, and a right leg opening 2R is formed in a right portion of the crotch region 1B. When the diaper 1 is worn with the left lower limb of the wearer inserted through the left lower limb opening 2L, the right lower limb of the wearer inserted through the right lower limb opening 2R, and the trunk portion of the wearer entering the trunk opening 2T, the front body region 1F is disposed on the abdomen side of the wearer, the rear body region 1R is disposed on the back side of the wearer, and the left lower limb opening 2L and the right lower limb opening 2R are fixed to the body of the wearer in a state surrounding the thigh portion of the wearer. Since the diaper 1 is fixed to the body of the wearer in this manner, the wearer can freely move while wearing the diaper 1.

In the diaper 1, an absorber capable of absorbing and retaining liquid is mainly disposed around the crotch region 1B. In the diaper 1, in order to suppress formation of a gap which is a flow-out path of liquid between the diaper 1 and the skin of the wearer, a three-dimensional gather 3BL is provided in the left leg opening 2L surrounding the thigh of the left leg of the wearer, a three-dimensional gather 3BR is provided in the right leg opening 2R surrounding the thigh of the right leg of the wearer, and a waist gather 3R is provided in a portion surrounding the abdomen of the wearer. Leg gathers 3LL, 3LR are provided at positions surrounding the root portions of the legs of the wearer. The three-dimensional gathers 3BL, 3BR and the waist gather 3R are adhered to the skin of the wearer by the elastic force of the linear rubber. The leg gathers 3LL and 3LR prevent gaps from being formed between the root portions of the legs of the wearer and the diaper 1. Therefore, the discharged liquid discharged from the private parts of the wearer hardly leaks out of the diaper 1 and is absorbed by the absorber of the diaper 1.

The diaper 1 can be used in combination with an inner pad (not shown). The inner pad is a substantially rectangular absorbent article provided with an absorber, and absorbs discharged liquid. In the case of using the diaper 1 and the inner pad in combination, the inner pad is placed on the skin surface side of the diaper 1 so as to abut against the discharge hole of the wearer. The discharged liquid is first absorbed by the inner pad, and only the discharged liquid which cannot 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 discharged liquid from the diaper 1 can be prevented. In addition, when the amount of discharged liquid is small and the discharged liquid can be absorbed by the inner pad, only the inner pad needs to be replaced even if discharged liquid is generated, so that the intervention (nursing) cost can be reduced. In addition, the diaper 1 can be used for a long time.

Fig. 2 is an exploded perspective view of the diaper 1 of the embodiment. The 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 bonded to each other to form the outer surface of the diaper 1, and the front end portion on the front body region 1F side and the rear end portion on the rear body region 1R side are the same. In a state of being worn on a wearer, the cover sheet 4 is laminated on the non-skin surface side of the wearer, and the inner cover sheet 5 is laminated on the wearer side. Linear rubber for forming the waist gather 3R and the leg gathers 3LL, 3LR is provided between the cover sheet 4 and the inner cover sheet 5. Further, a band-shaped expansion member such as rubber can be appropriately selected instead of the linear rubber.

For the cover sheet 4 and the inner cover sheet 5, for example, nonwoven fabrics made of liquid impermeable thermoplastic resins can be used as materials for the cover sheet 4 and the inner cover sheet. Here, examples of the liquid-impermeable thermoplastic resin include Polyethylene (PE) and polypropylene (PP). Hereinafter, as a concept corresponding to the configuration of the absorber 8 and the combination of the back sheet 6, the top sheet 9, the side sheets 10L, 10R and the absorber 8, the cover sheet 4 and the inner cover sheet 5, in which the linear rubber is disposed, may be referred to as an outer case.

The diaper 1 has a back sheet 6, an absorber 8, and a top sheet 9 laminated in this order on the wearer-side surfaces of the cover sheet 4 and the inner cover sheet 5. The back sheet 6 is a substantially rectangular parallelepiped sheet having a length extending from the front body to the rear body of the wearer through the crotch in the longitudinal direction and a predetermined width in the width direction orthogonal to the longitudinal direction. The absorber 8 and the top sheet 9 are sheet-like members having a substantially rectangular appearance similar to the back sheet 6, and are sequentially laminated on the back sheet 6 in a state where the longitudinal direction matches the longitudinal direction of the back sheet 6. The back sheet 6 is a sheet made of a liquid impermeable thermoplastic resin for suppressing leakage of excrement. The top sheet 9 is a sheet-like member disposed on the skin surface side of the wearer so as to cover the water absorbing surface of the absorber 8. Part or all of the top sheet 9 has liquid permeability. Thus, in a state in which the diaper 1 is worn, liquid excreted from the wearer is immersed in the absorbent body 8 through the topsheet 9 which may come into contact with the wearer's skin, where it is absorbed. Examples of the liquid-permeable sheet include woven fabrics, nonwoven fabrics, and porous films. In addition, the top sheet 9 may have hydrophilicity.

The absorbent body 8 has an absorbent core 8c composed of 1 or more pads and a core wrap sheet 7 wrapped around the absorbent core 8 c. In the present embodiment, the absorbent core 8c has a substantially hourglass shape having narrowed portions. The absorbent core 8c has a structure in which a particulate absorbent resin (high-molecular-weight water-absorbent material) such as SAP (high-absorbent polymer: super Absorbent Polymer) which is a hydrophilic polymer having a crosslinked structure capable of absorbing and retaining water is retained in the interstices of cellulose-based fibers such as pulp fibers, rayon fibers, and cotton fibers, and the like, and the fibers are hydrophilized with synthetic fibers such as polyethylene, polypropylene, and polyethylene terephthalate. When the absorbent core 8c absorbs liquid excreted from the wearer, the absorbent resin in the gaps held in the short fibers is swelled to hold the liquid in the short fibers. In the present embodiment, the absorbent core 8c is substantially hourglass-shaped with a narrowed central portion. The absorbent core 8c may take 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 be mixed into other structures. In addition, the deformation of the absorbent core 8c is suppressed. The core wrap sheet may be formed of pulp fibers, and as an example, a tissue may be used. The core wrap sheet 7 may be 1 sheet, or may be composed of 2 sheets, that is, an upper sheet disposed on the skin side of the wearer and a lower sheet disposed on the non-skin side of the wearer and wound around the side surface and the skin side of the absorbent core. When the core wrap sheet 7 is formed of 2 sheets, the width direction end portion of the upper side sheet may be wrapped with another sheet (for example, side sheets 10L and 10R, back sheet 6, and top sheet 9 described later). Further, the absorber 8 is wrapped with the back sheet 6 and the top sheet 9, and the shape of the body can be suppressed by these sheets, so that the core wrap sheet 7 may not be provided.

The back sheet 6, the absorber 8 and the top sheet 9 all extend from the front body region 1F to the back body region 1R. Therefore, when the back sheet 6, the absorber 8, and the top sheet 9 are laminated to cover the wearer's pudendum (crotch), both ends in the longitudinal direction of each of the back sheet 6, the absorber 8, and the top sheet 9 are positioned on the wearer's abdomen side and back side. That is, the pudendum of the wearer is covered with the absorber 8 from the abdomen side to the back side of the wearer. Therefore, the discharged liquid is brought into contact with the absorber 8 via the top sheet 9 regardless of whether the wearer discharges the liquid to the outside in any one of the abdomen-down posture and the back-down posture.

The diaper 1 has elongated belt-shaped side panels 10L and 10R for forming the above-described three-dimensional gathers 3BL and 3BR. The side sheets 10L and 10R are provided on the long side of the top sheet 9. The linear rubbers 10L1 and 10R1 are bonded to the side sheets 10L and 10R in the longitudinal direction. Thus, when 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 rear body region 1R, are joined to each other, and the edge 4F5 of the cover sheet 4, which is the right edge of the front body region 1F, and the edge 4R5, which is the right edge of the rear body region 1R, are joined to each other, the side sheets 10L, 10R are pulled in the longitudinal direction by the contraction force of the linear rubbers 10L1, 10R1, and rise from the top sheet 9 along the folding lines 10L2, 10R2, as in the diaper 1 in the finished state shown in fig. 1. As a result, three-dimensional gathers 3BL, 3BR are formed which prevent liquid from flowing out of the left and right lower limb openings 2L, 2R. The bonding method of the edges 4F4 and 4R4, and the edges 4F5 and 4R5 is not particularly limited, and may be performed by heat sealing, high-frequency sealing, ultrasonic sealing, or the like, for example.

The diaper 1 further includes an end sheet 11F that is laminated on the wearer-side surface in the front region 1F of the cover sheet 4, and an end sheet 11R that is laminated on the wearer-side surface in the back region 1R of the cover sheet 4, with the backsheet 6, the absorber 8, the top sheet 9, and the side sheets 10L, 10R interposed therebetween. The end sheets 11F and 11R are elongated sheets that overlap the cover sheet 4 and the inner cover sheet 5 at one end side in the longitudinal direction of the top sheet 9. The end pieces 11F, 11R are non-water-impermeable nonwoven fabrics, and reinforce the cover piece 4 and the inner cover piece 5 mainly at the waist contact portion of the diaper 1. The end pieces 11F and 11R are coated with an adhesive, and bonded to the inner cover piece 5 with the adhesive. The end sheets 11F, 11R are disposed closer to the skin surface than the laminate formed by the back sheet 6, the absorber 8, the top sheet 9, and the side sheets 10L, 10R, and prevent the end portions of the laminate from directly contacting the skin surface to give the wearer discomfort (offensive feeling).

Fig. 3 is a view schematically showing a state in which the diaper 1 of the embodiment is developed and extended. The left view of fig. 3 schematically shows the internal structure in the case of the diaper 1 in the developed and extended state as viewed from the left side. The right-hand drawing of fig. 3 schematically shows a plan view of the diaper 1 in an unfolded and extended state. In the right drawing of fig. 3, the side panels 10L and 10R and the end panels 11F and 11R are not shown. One end side of the cover sheet 4 is folded back at folding lines 4FF and 4RF shown in fig. 2. The above-described waist gather 3R is formed by bonding linear rubbers (linear rubbers) 4F1, 4F2 to the front region of the cover sheet 4 and bonding linear rubbers (linear rubbers) 4R1, 4R2 to the rear region of the cover sheet 4. The linear rubbers 4F1, 4F2 are provided in the order of the linear rubbers 4F1, 4F2 from the side of the folding line 4FF along the folding line 4FF forming the upper edge of the precursor region 1F when folded back. The linear rubbers 4R1 and 4R2 are also provided in the order of the linear rubbers 4R1 and 4R2 from the side of the folded back line 4RF along the folded back line 4RF that forms the upper edge of the back body region 1R when folded back, as with the linear rubbers 4F1 and 4F 2.

Therefore, the linear rubbers 4F1, 4F2 are provided on the cover sheet 4 in such an orientation that the longitudinal direction, which is the expansion and contraction direction, is the lateral direction of the diaper 1. The linear rubbers 4R1, 4R2 are provided on the cover sheet 4 in such a manner that the longitudinal direction, which is the extension and contraction direction, is the lateral direction of the diaper 1. 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 linear rubbers 4F1 and 4F2 and the linear rubbers 4R1 and 4R2 form a substantially annular stretchable member surrounding along the trunk opening 2T, and function to shrink the trunk opening 2T in the trunk-surrounding direction. That is, the linear rubbers 4F1 and 4F2 and the linear rubbers 4R1 and 4R2 exert contraction force to bring the diaper 1 into close contact with the wearer, thereby preventing a gap from being formed between the diaper 1 and the abdominal circumference of the wearer. The linear rubber 4F2 and the linear rubber 4R2 overlap the absorber 8 at a part of the crotch region 1B side thereof.

The linear rubbers 4F1 and 4R1 are provided so as to extend in the left-right direction along portions that are upper edges of the front body region 1F and the rear body region 1R shown in fig. 1. The linear rubbers 4F2, 4R2 are disposed in parallel at predetermined intervals. The linear rubbers 4F1 and 4R1 are fastened relatively strongly to the abdominal circumference of the wearer at positions above the linear rubbers 4F2 and 4R2 in the state where the diaper 1 is worn. The linear rubbers 4F1 and 4R1 serve to prevent the diaper 1 from being put on the wearer by being brought into close contact with the wearer, thereby preventing displacement of the wearing position and leakage of discharged liquid from the abdomen and back. The linear rubbers 4F2, 4R2 alleviate the sense of compression to the wearer caused by the contraction force of the linear rubbers 4F1, 4R 1. In addition, in the case of using the inner pad, the displacement of the inner pad is suppressed. The linear rubbers 4F1, 4F2, 4R1, 4R2 are examples of the 1 st stretchable member in the present disclosure.

Further, the linear rubber 4F3 and the linear rubber 4R3 are bonded to the cover sheet 4. The linear rubbers 4F3 and 4R3 are expansion and contraction members provided in the cover sheet 4 in the region on the crotch region 1B side of the linear rubbers 4F2 and 4R 2. However, unlike the other linear rubbers bonded so as not to be bent from the left end to the right end of the cover sheet 4, the linear rubbers 4F3 and 4R3 are arranged so as to be bent in the direction of the crotch region 1B. By disposing the linear rubbers 4F3, 4R3 so as to be curved, the disposed areas of the linear rubbers 4F3, 4R3 have the function of leg gathers 3LL, 3LR that bring the peripheries of the left and right lower limb openings 2L, 2R into contact with the skin surface of the wearer. The linear rubbers 4F3 and 4R3 are examples of the 2 nd expansion member in the present disclosure.

The linear rubber 4F3 on the front body region 1F side is continuous in the width direction across the extension region of the absorber 8 in the width direction. The portion of the linear rubber 4F3 that traverses the extension region of the absorber 8 in the width direction corresponds to the vicinity of the pubis of the wearer. The urethral orifice of the wearer is in contact with the skin surface side of the diaper 1 further on the crotch side than the portion where the linear rubber 4F3 crosses the extension region of the absorber 8.

On the other hand, the linear rubber 4R3 on the rear body region 1R side overlaps the widthwise outer side of the absorbent core 8c at the narrowed portion of the hourglass-shaped absorbent core, but does not traverse the extension region of the absorbent body 8 in the widthwise direction. The linear rubber 4R3 is disposed in a region that abuts the buttocks of the wearer in the vicinity of the absorber 8. In the back region 1R, the diaper 1 is pressed more strongly than the front region 1F due to the pressure applied to the buttocks of the wearer. Therefore, the linear rubber 4R3 is not provided at the widthwise central portion of the absorber 8, but is biased so as to pull apart the widthwise end portions of the absorber 8 from each other, whereby the diaper 1 can be brought into contact with the wearer with an appropriate adhesion force.

The cover sheet 4 is folded back at the folded-back lines 4FF and 4RF to extend to the arrangement regions of the linear rubbers 4F1 and 4R1, and the arrangement regions of the linear rubbers 4F1 and 4R1 are reinforced by the folded-back portions. The end pieces 11F, 11R are provided in the arrangement regions of the linear rubber 4F2 and the linear rubber 4R2 where the cover piece 4 folded back at the folding lines 4FF, 4RF does not extend, and reinforce the arrangement regions of the linear rubber 4F2 and the linear rubber 4R 2.

The state in which sheets overlap in the present application is not limited to a state in which sheets overlapping each other are overlapped with each other in a state of being in full contact with each other, but includes a concept in which a part of the sheets overlap with each other. For example, a portion of the end piece 11F on one end side in the longitudinal direction of the back piece 6 overlaps with a portion of the cover piece 4 in a contact state. In the diaper 1, the cover sheet 4, the end sheets 11F, 11R, the inner cover sheet 5, and the side sheets 10L, 10R are stacked in addition to the back sheet 6 and the top sheet 9 sandwiching the absorber 8, and therefore, it can be said that a laminate in which these multiple sheets are stacked is provided.

When the diaper 1 is used for an adult, the wearer's physique is significantly different from that of an infant. Thus, the diaper 1 can be provided in a plurality of sizes suitable for the wearer's physique. The diapers 1 having different sizes are mainly realized by changing the sizes of the front region 1F and the rear region 1R of the outer body. The structure of the crotch portion of a human being and the positional relationship of the excretory opening do not greatly change depending on the wearer's physique. In addition, it is known that the excretion amount of the elderly person who is a demand for diapers for adults is independent of the physical constitution. Therefore, by adjusting the structure of the outer cover as described below, it is possible to provide diapers 1 having substantially the same absorber 8 in a plurality of sizes.

For example, a pack of diapers for an adult having a long waist (waistline) (including a 1 st pack of 1 st absorbent articles having a 1 st size) and a pack of diapers for an adult having a short waist (waistline) (including a 2 nd pack of 2 nd absorbent articles having a 2 nd size) are given the same brand mark and sold together as a plurality of absorbent article packs. Further, the kinds of bags may be further increased in accordance with the physical constitution of the wearer, or bags suitable for 3 or more physical constitution may be sold at the same time. In this case, since the substantially identical absorber 8 can be used, the diaper 1 which can be adapted to the physical constitution of the wearer while suppressing the increase in manufacturing cost can be provided, and thus the satisfaction of the wearer and the facilitator (helper) can be improved.

Such a plurality of absorbent article packages can be realized by changing the longitudinal length of the outer package and changing the width of the outer package in the front body region 1F and the rear body region 1R. Further, if the length of the linear rubber is also changed in accordance with the width of the outer covering body, the contraction force per unit area can be shared among the outer covering bodies having a plurality of waist sizes, and the wearing feeling can be shared even with diapers having different sizes.

When changing the longitudinal length of the outer package, the intervals between the linear rubbers 4F2 and 4R2 may be set to be the same interval, and the number may be changed according to the longitudinal length of the outer package. By unifying the intervals between the linear rubbers 4F2 and 4R2, the contraction force per unit area of the linear rubbers in the vicinity of the absorber 8 is shared with the absorber 8 in diapers of a plurality of sizes. Therefore, the diaper 1 having a common wearing feel can be provided. In addition, the area of the portion (overlapping region) where the linear rubbers 4F2, 4R2 overlap the absorber 8 is shared among a plurality of dimensions, so that the contraction force applied to the absorber 8 can be shared. Therefore, in the diaper 1 having a plurality of outer bodies of the same size, the same size absorber 8 can be used without changing the wearing feeling.

In the outer body of a plurality of sizes, the distance between the end portions of the linear rubbers 4F2, 4R2 on the crotch side in the longitudinal direction and the right and left lower limb openings 2R, 2L serving as leg holes through which the legs of the wearer pass may be shared. In addition, at the position where the width is the narrowest in the crotch region 1B, the distance between the widthwise end of the outer body and the widthwise end of the absorber 8 is common regardless of the size of the outer body. It is known that the configuration of the root and crotch portions of the legs of humans is not affected by the physical constitution. Therefore, the distance from the linear rubbers 4F2 and 4R2 constituting the waist gather 3R to the leg opening is shared by the diapers 1 of a plurality of sizes, whereby the diapers 1 having a common sense of wearing in a plurality of sizes can be provided.

Fig. 4 is a view schematically showing a cross-sectional configuration of a diaper. The absorber 8 includes a core wrap sheet 7 and an absorbent core 8c wrapped by the core wrap sheet 7. The absorbent core 8c has a substantially gourd-like or substantially hourglass shape having a narrowed portion in the crotch region when viewed in plan.

The crotch region is sandwiched between the legs of the wearer, and therefore applies compressive pressure inward in the width direction. On the other hand, in the front body region and the rear body region, pressure is applied in the thickness direction of the absorbent core 8c by applying the weight of the wearer. Therefore, in the crotch region, the absorbent core 8c is provided with a narrowed portion to prevent the deformation. In the front and rear body regions, the width of the absorbent core 8c is increased to increase the area to which the weight of the wearer is applied, thereby preventing the wearer from being deformed in the thickness direction. Therefore, the absorbent core 8c is preferably substantially gourd-shaped or hourglass-shaped.

The absorbent core 8c contains, in addition to cellulose-based short fibers or resin-based short fibers (hereinafter referred to as short fibers) subjected to hydrophilic treatment, particulate absorbent resins (particles of SAP) such as hydrophilic superabsorbent polymers having a crosslinked structure capable of absorbing and retaining water. When discharged liquid is discharged from the wearer and impregnated into the absorbent core 8c, the particles of SAP absorb moisture and gradually expand, fixing the discharged liquid and preventing backflow to the skin surface side.

In the present figure, the absorbent core 8c is wrapped with a water-permeable core wrap sheet 7. The core wrap sheet 7 is divided into an upper core wrap sheet 7f positioned on the skin side of the wearer when worn and a lower core wrap sheet 7b positioned on the non-skin side of the wearer when worn. The upper core wrap sheet 7f is adhered to the skin surface side of the absorbent core 8c by an adhesive agent HM such as a hot melt adhesive. The lower core wrap sheet 7b is adhered to the non-skin surface side of the absorbent core 8c by an adhesive agent HM such as a hot melt adhesive.

The adhesive strength between the absorbent core 8c and the upper core wrap sheet 7f is stronger than the adhesive strength between the absorbent core 8c and the lower core wrap sheet 7b. Specifically, the width of the adhesive HM for bonding the upper core-wrap sheet 7f and the absorbent core 8c may be made wider than the width of the absorbent core 8c, and the width of the adhesive HM for bonding the lower core-wrap sheet 7b and the absorbent core 8c may be made narrower than the width of the absorbent core 8 c. In order to bond the absorbent core 8c and the lower core wrap sheet 7b, the amount of the adhesive HM applied may be reduced, or an adhesive HM having a low adhesive strength may be used. Alternatively, the application range of the adhesive HM used for this purpose may be limited. Therefore, when a force is applied to pull the absorbent core 8c away from the core wrap sheet 7, the absorbent core 8c and the lower core wrap sheet 7b are peeled off relatively easily.

The adhesive HM is easily peeled off to form the flow path 8s when a force is applied to separate the lower core wrap sheet 7b from the absorbent core 8c, for example, when the absorbent core 8c absorbs water and swells, or when a discharged liquid flows between the lower core wrap sheet 7b and the absorbent core 8 c. When the flow path 8s is formed even when the diaper 1 does not absorb water and the flow path 8s is not required, the flow path 8s may cause the absorbent core 8c to be deformed. If the flow path 8s is formed only when the absorbent core 8c absorbs water, the flow path 8s can be formed only when needed.

The backsheet 6 is a water impermeable film laminated on the non-skin surface side of the absorbent body 8, and prevents the discharged liquid that has permeated the absorbent body 8 from leaking out to the cover sheet 4 side. The back sheet 6 is wider than the absorbent core 8c, and wraps around the side surface of the absorbent core 8c until reaching the skin surface side.

The top sheet 9 is a water permeable sheet that abuts the skin surface of the wearer. When discharged liquid is generated from the wearer, the discharged liquid is saturated and absorbed by the topsheet 9 toward the absorbent core 8 c. The top sheet 9 is also wider than the absorbent core 8c, wrapping around the side of the absorbent core 8c to the non-skin side. The top sheet 9 is laminated on the skin surface side of the absorber 8 at a position closer to the skin surface side than the back sheet 6.

The side sheets 10L and 10R are water impermeable nonwoven fabric sheets disposed on both sides in the width direction of the absorber 8, and constitute a pair of side sheets covering the side surfaces in the width direction of the absorber 8. The side sheets 10L, 10R are provided at the skin surface side end portions of the absorbent body 8, and are raised toward the skin surface side of the wearer by the contraction force of the linear rubbers 10L1, 10R1 extending in the longitudinal direction, thereby forming three-dimensional gathers 3BL, 3BR preventing lateral leakage of discharged liquid in the front-rear direction of the wearer. The side sheets 10L and 10R are laminated on the skin surface side of the absorbent body 8 at a position closer to the skin surface side than the top sheet 9. The linear rubbers 10L1 and 10R1 are examples of the 3 rd expansion member in the present disclosure.

The side sheets 10L and 10R are bonded to each other by continuously applying a water impermeable adhesive HM such as a hot melt adhesive in the longitudinal direction to the widthwise end portion of the skin surface side of the top sheet 9, and form standing lines of the three-dimensional gathers 3BL and 3BR to constitute a pair of standing lines. The adhesive HM is hydrophobic, and the widthwise end of the topsheet 9 impregnated with the adhesive HM becomes a water impermeable region. Therefore, the discharged liquid does not move from the area coated with the adhesive HM toward the widthwise end and leaks from the widthwise end. On the other hand, the inner side in the width direction of the water impermeable region is a water permeable region, and the discharged liquid is passed through the absorbent core 8c side. In addition, a top sheet 9 made of a water impermeable material may be used at both ends in the width direction. The adhesive HM itself is hydrophobic, and can prevent the movement of the discharged liquid to the widthwise end portion side to such an extent that the discharged liquid is prevented from leaking from the widthwise end portion. If the top sheet 9 made of a water impermeable material is used at both ends in the width direction, the movement of the discharged liquid to the ends in the width direction can be suppressed more effectively. On the other hand, on both end portions in the longitudinal direction, the inner side in the width direction of the water impermeable region is a water permeable region, and the discharged liquid is passed through the absorbent core 8c side. Therefore, the absorbent core 8c can easily absorb the discharged liquid and hold the discharged liquid.

Fig. 5 is a view showing an example of a gap formed when the diaper of the embodiment is worn. Specifically, fig. 5 shows a state in which the front region of the diaper 1 is in contact with the abdomen side of the wearer when the diaper 1 is worn. A linear rubber 4F3 is disposed in the precursor region. The linear rubber 4F3 is disposed at a bulge portion of the lower abdomen of the wearer, more specifically, at a position where it abuts against the pubic bone. The linear rubber 4F3 is disposed so as to traverse the absorber 8 in the lateral direction, and has a function of strongly pressing the absorber 8 against the pubic portion of the wearer in the extended region thereof. The urethral orifice is located further toward the crotch side than the pubic bone, but the pubic bone portion strongly abuts the absorber 8 by the action of the linear rubber 4F3, so that it is possible to prevent urine discharged from the urethral orifice from leaking out to the abdomen side. In the present embodiment, the linear rubber 4F3 has a function of urging the outer body to abut against the leg hole of the wearer, and also has a function of urging the outer body to abut against the lower abdomen of the wearer.

A groin portion exists between the lower abdomen and the root of the thigh of the human body of the wearer. The top sheet 9 side of the diaper 1 is biased toward the outside of the thighs of the wearer by the biasing force of the three-dimensional gathers 3BL and 3BR provided in the side sheets 10L and 10R, while the linear rubber 4F3 is biased toward the outside of the thighs of the wearer, and is biased toward the wearer in the groin portion, the skin surface side of the diaper 1 is biased so as to be in close contact with the wearer, and the non-skin surface side of the diaper 1 is biased so as to be away from the wearer.

Therefore, a space is formed between the skin surface side and the non-skin surface side of the diaper 1 at the groin portion and at the widthwise outer side of the widthwise end portion of the absorbent core 8c, and this space functions as a flow path 8 s.

Further, on the back side of the wearer, the linear rubber 4R3 extends to the widthwise outer side of the absorbent core 8 c. The skin surface side of the absorbent core 8c is pressed by the buttocks of the wearer. On the other hand, the widthwise outer side on the non-skin surface side is biased to the widthwise outer side by the linear rubber 4R 3. Therefore, a space formed between the widthwise end of the absorbent core 8c and the widthwise end of the absorber 8 is also maintained on the back side of the wearer, and this space functions as a flow path 8 s.

In the crotch portion, the skin surface side is brought into contact with the skin surface of the wearer by the urging forces of the three-dimensional gathers 3BL and 3BR, while the non-skin surface side sags away from the skin surface due to the weight of the discharged matter. As already described, the non-skin surface side of the absorbent core 8c and the lower core wrap sheet 7b are easily peeled off. Therefore, in the crotch portion, a space is formed between the absorbent core 8c and the lower core wrap sheet 7b, and this space functions as a flow path 8s, and can allow the discharged material to move rapidly.

The flow path 8s functions as a flow guide hole for the discharged liquid, and the discharged liquid flowing into the flow path 8s flows along the flow path 8s into a portion where the width of the front region side or the rear region side of the absorbent core 8c becomes wider, and is absorbed therein. As described above, since the flow paths 8s are formed in the narrowed portions of the absorbent body 8 of the diaper 1 according to the present embodiment in the front body region, the crotch region, and the rear body region, the discharged liquid can be efficiently moved, and the discharged liquid can be rapidly absorbed in the portions of the front body region end portion or the rear body region end portion where the discharged liquid is not absorbed, such as the ears.

< embodiment 2 >

Fig. 6 is a view schematically showing a state in which the diaper 1 according to embodiment 2 is developed and extended. In embodiment 2, the same reference numerals are given to the same components in the drawings, and overlapping description is omitted as appropriate. In embodiment 2, a linear rubber 4F3 and a linear rubber 4R3 are bonded to the cover sheet 4. The linear rubbers 4F3 and 4R3 are expansion and contraction members provided in the cover sheet 4 in the region on the crotch region 1B side of the linear rubbers 4F2 and 4R 2. In embodiment 2, the linear rubbers 4F3 and 4R3 are arranged to curve in the direction of the crotch region 1B. The linear rubbers 4F3, 4R3 overlap with a part of the core wrap sheet 7 at the narrowed portion of the hourglass-shaped absorbent core, do not extend to a portion corresponding to the widthwise central portion of the absorber 8, and apply force to the absorber 8 from the widthwise end portion of the absorber 8. The arrangement regions of the linear rubbers 4F3, 4R3 function as leg gathers 3LL, 3LR as in embodiment 1.

The cover sheet 4 is folded back at the folding lines 4FF and 4RF to extend to the arrangement regions of the linear rubbers 4F1 and 4R1, and the arrangement regions of the linear rubbers 4F1 and 4R1 are reinforced at the folded back portions. The end pieces 11F, 11R are provided in the arrangement regions of the linear rubber 4F2 and the linear rubber 4R2 where the cover piece 4 folded back at the folding lines 4FF, 4RF does not extend, and reinforce the arrangement regions of the linear rubber 4F2 and the linear rubber 4R 2.

Fig. 7 is a view schematically showing a cross-sectional structure of the diaper of embodiment 2. The absorber 8 includes a core wrap sheet 7 and an absorbent core 8c composed of a plurality of absorbent pads and wrapped by the core wrap sheet 7. In embodiment 2, the absorbent core 8c has a structure in which absorbent pads are laminated, and has an upper absorbent pad 8a and a lower absorbent pad 8b. The upper absorbent pad 8a is an absorbent pad that is positioned on the skin surface side of the wearer in a worn state, and is an hourglass shape having a narrowed portion in the crotch region when viewed in plan. The upper absorbent pad 8a extends to the vicinity of the widthwise end of the absorber 8 at the vicinity of the lengthwise end. In contrast, the lower absorbent pad 8b is an absorbent pad that is positioned on the non-skin surface side of the wearer in the worn state, and has a rectangular shape in plan view. The lower absorbent pad 8b extends only in the central portion of the absorber 8 at a portion corresponding to the wearer's midline, and its full width is equal to or less than the narrowed portion of the upper absorbent pad 8 a. That is, the lower absorbent pad 8b is laminated on the upper absorbent pad 8a so that the entire lower absorbent pad 8b is hidden by the upper absorbent pad 8a when seen in a plane on the skin surface side.

The crotch region is sandwiched between the legs of the wearer, and therefore applies compressive pressure inward in the width direction. On the other hand, in the front body region and the rear body region, pressure is applied in the thickness direction of the absorbent core 8c by applying the weight of the wearer. Therefore, by providing the narrowed portion in the crotch region of the absorbent core 8c and stacking the upper layer absorbent pad 8a and the lower layer absorbent pad 8b, the absorbent core 8c in the crotch region is set to a high order, and thus, deformation to the inner side in the width direction is prevented. In the front and rear body regions, the width of the absorbent core is increased to increase the weight application area, thereby preventing the deformation in the thickness direction. Therefore, the absorbent core 8c is preferably an hourglass shape.

The upper layer absorbent pad 8a contains, in addition to cellulose-based short fibers or resin-based short fibers subjected to hydrophilic treatment (hereinafter referred to as short fibers), a particulate absorbent resin (SAP particles) such as a hydrophilic superabsorbent polymer having a crosslinked structure capable of absorbing and retaining water. When discharged liquid is discharged from the wearer and impregnated into the absorbent core 8c, the particles of SAP absorb moisture and gradually expand, fixing the discharged liquid and preventing backflow to the skin surface side. On the other hand, the SAP particles contained in the lower absorbent pad 8b have a lower order (amount of SAP particles blended per unit area) than the upper absorbent pad 8 a. Alternatively, the lower absorbent pad 8b may be formed of only short fibers without particles containing SAP.

In the present figure, the absorbent core 8c is wrapped with a water-permeable core wrap sheet 7. The core wrap sheet 7 is divided into an upper core wrap sheet 7f positioned on the skin side of the wearer when worn and a lower core wrap sheet 7b positioned on the non-skin side of the wearer when worn. The upper core wrap sheet 7f is bonded to the upper absorbent pad 8 a. The lower core wrap sheet 7b is bonded to the lower absorbent pad 8 b. However, the non-skin surface side of the upper absorbent pad 8a and the lower core wrap sheet 7b are not bonded in most of the areas directly opposed to each other. Therefore, in the absorber 8, the flow path 8s is formed between the lower core wrap sheet 7b at a position further outside the widthwise end portion of the lower absorbent pad 8b and where the upper absorbent pad 8a extends.

In addition, when a force is applied to pull the lower core-wrap sheet 7b away from the absorbent core 8c, the non-skin-side surfaces of the lower core-wrap sheet 7b and the upper absorbent pad 8a can be peeled off more easily than the non-skin-side surfaces of the lower core-wrap sheet 7b and the lower absorbent pad 8 b. Specifically, the width of the adhesive that bonds the lower core wrap sheet 7b and the lower absorbent pad 8b may be made wider than the width of the lower absorbent pad 8b, and only the end of the adhesive may be bonded to the non-skin surface side of the upper absorbent pad 8 a. In order to adhere the non-skin surface side of the upper absorbent pad 8a to the lower core wrap sheet 7b, the amount of the adhesive applied may be reduced, or an adhesive having a low adhesive strength may be used. Alternatively, the application range of the adhesive used for this purpose may be limited. The adhesive is easily peeled off to form the flow path 8s when a force is applied to separate the lower core wrap sheet 7b from the absorbent core 8c, for example, when the lower absorbent pad 8b absorbs water and swells, or when a discharged liquid flows between the lower core wrap sheet 7b and the upper absorbent pad 8 a. When the flow path 8s is formed even when the diaper 1 does not absorb water and the flow path 8s is not required, the flow path 8s may cause the absorbent core 8c to be deformed. If the flow path 8s is formed only when the absorbent core 8c absorbs water, the flow path 8s can be formed only when needed.

The backsheet 6 is a water impermeable film laminated on the non-skin surface side of the absorbent body 8, and prevents the discharged liquid that has permeated the absorbent body 8 from leaking out to the cover sheet 4 side. The back sheet 6 is wider than the absorbent core 8c, wraps around the side surface of the absorbent core 8c and reaches the skin surface side.

The top sheet 9 is a water permeable sheet that abuts the skin surface of the wearer. When discharged liquid is generated from the wearer, the discharged liquid is saturated and absorbed by the topsheet 9 toward the absorbent core 8 c. The top sheet 9 is also wider than the absorbent core 8c, wrapping around the side of the absorbent core 8c and reaching the non-skin side. The top sheet 9 is laminated on the skin surface side of the absorber 8 at a position closer to the skin surface side than the back sheet 6.

The side sheets 10L and 10R are water impermeable nonwoven fabric sheets disposed on both sides in the width direction of the absorber 8, and constitute a pair of side sheets covering the side surfaces in the width direction of the absorber 8. The side sheets 10L, 10R further stand up toward the skin surface side at the skin surface side end portion of the absorber 8 by the urging force of the linear rubbers 10R1, 10L1 arranged parallel to the longitudinal direction on the inner side in the width direction, forming three-dimensional gathers 3BL, 3BR preventing lateral leakage of discharged liquid. The side sheets 10L and 10R are laminated on the skin surface side of the absorbent body 8 at a position closer to the skin surface side than the top sheet 9.

The water impermeable adhesive HM is continuously applied to the widthwise end portion of the skin surface side of the top sheet 9 in the longitudinal direction, and the side sheets 10L, 10R are bonded to form standing lines of the three-dimensional gathers 3BL, 3BR, constituting a pair of standing lines. The adhesive HM is hydrophobic, and the widthwise end of the topsheet 9 impregnated with the adhesive HM becomes a water impermeable region. Therefore, the discharged liquid does not move from the area coated with the adhesive HM toward the widthwise end and leaks from the widthwise end. On the other hand, the inner side in the width direction of the water impermeable region is a water permeable region, and the discharged liquid is passed through the absorbent core 8c side. In addition, a top sheet 9 made of a water impermeable material may be used at both ends in the width direction. The hot-melt adhesive itself is hydrophobic, and can prevent the movement of the discharged liquid to the widthwise end portion side to such an extent that the discharged liquid is prevented from leaking from the widthwise end portion, but is not completely suppressed. If the top sheet 9 made of a water impermeable material is used at both ends in the width direction, the movement of the discharged liquid to the ends in the width direction can be suppressed more effectively. On the other hand, on both end portions in the longitudinal direction, the inner side in the width direction of the water impermeable region is a water permeable region, and the discharged liquid is passed through the absorbent core 8c side.

In the absorbent body 8 of the present embodiment, a top sheet 9 and side sheets 10L and 10R made of nonwoven fabric are laminated on the lateral side surface portion of the back sheet 6 on the outer side. The top sheet 9 and the side sheets 10L, 10R at the side surface portions of the absorber 8 correspond to nonwoven fabric sheets described in the present application. By covering the side surface of the absorber 8 with a plurality of nonwoven fabric sheets in this manner, the back sheet 6, which is a water impermeable film, can be prevented from directly contacting the skin surface of the wearer at the side surface portion of the absorber 8, thereby giving a sense of discomfort. The side surface of the absorber 8 is covered with a plurality of sheets to be reinforced, and the absorbent core 8c is prevented from being deformed.

At both longitudinal ends of the absorbent body 8, the water permeable area of the top sheet 9 is narrower than the upper layer absorbent pad 8a constituting the absorbent core 8c and wider than the lower layer absorbent pad 8 b. Therefore, the discharged liquid that has not been completely absorbed near the widthwise central portion of the top sheet 9, has spread on the top sheet 9 and passed through the water permeable region on the lengthwise end side passes through the upper absorbent pad 8a, and directly reaches the flow channels 8s.

The discharged liquid having reached the flow path 8s passes through the flow path 8s and spreads over a wide range of the absorbent core 8c, and is sequentially absorbed at the position where the absorbent core 8c can absorb. Therefore, the absorption of the discharged liquid can be efficiently performed over a wide range using the absorbent core 8c, and the backflow of the discharged liquid can be prevented when the amount of the discharged liquid locally exceeds the absorption capacity of the absorbent core, for example, when a large amount of discharged liquid is generated at a time.

On the other hand, the upper layer absorbent pad 8a and the lower layer absorbent pad 8b extend at the widthwise central portion of the absorbent core 8c, that is, at positions corresponding to the excretory opening of the wearer, and the absorbent core 8c has a laminated structure. According to this configuration, if a large amount of discharged liquid is not generated, it can be received and absorbed on site.

When the wearer discharges the discharged liquid to the diaper 1 having the above-described characteristics, the discharged liquid passes through the water-permeable region of the water-permeable topsheet 9 and the upper core wrap sheet 7f having the water permeability to reach the upper absorbent pad 8a. The upper absorbent pad 8a contains particles of SAP, but the particles of SAP require a certain time for absorbing liquid. Therefore, most of the discharged liquid passes through the upper absorbent pad 8a once, and reaches the flow path 8s or the lower absorbent pad 8b.

Here, the lower absorbent pad 8b contains particles of SAP with a lower order of delivery than the upper absorbent pad 8a, or the lower absorbent pad is substantially free of particles of SAP. That is, the lower absorbent pad 8b mainly has a function of temporarily storing the discharged liquid passing through the upper absorbent pad 8a with short fibers and gradually returning the discharged liquid to the upper absorbent pad 8a. Therefore, the discharged liquid having reached the lower absorbent pad 8b is gradually absorbed again by the particles of the SAP of the upper absorbent pad 8a or flows out to the flow path 8s. When moisture further flows in a state where the particles of SAP have absorbed moisture to expand, a so-called gel blocking phenomenon that the flow of moisture is hindered by the particles of expanded SAP sometimes occurs. The particles containing no SAP or only a small amount in the lower absorbent pad 8b can be guided to an appropriate absorption position while decelerating the discharged liquid in such a manner that the gel blocking phenomenon does not occur.

The flow path 8s extends in the longitudinal direction of the absorber 8. The discharged liquid flowing into the flow path 8s from the lower absorbent pad 8b is gradually absorbed by the upper absorbent pad 8a while moving in the flow path 8 s. When the discharged liquid is concentrated in a specific portion of the absorbent core 8c and exceeds the absorption capacity, the discharged liquid flows through the flow path 8s and can be absorbed by another portion having a margin for the absorption capacity. Therefore, the absorbent core 8c can absorb the discharged liquid over the entire area thereof, and can prevent the discharged liquid from flowing back to the skin surface at a portion exceeding the absorption capacity, thereby giving uncomfortable feeling to the wearer.

When viewed from the skin surface side, the flow path 8s is covered with the planar upper absorbent pad 8a, and the step caused by the width difference from the width of the narrower lower absorbent pad 8b does not appear on the skin surface side of the diaper 1. Therefore, the wearer does not feel the step and is less likely to feel uncomfortable. Further, since the upper absorbent pad 8a is provided between the channels 8s and the top sheet 9, the discharged liquid flowing through the channels 8s can be prevented from flowing back to the skin surface of the wearer.

Fig. 8 is a view of the longitudinal end portion of the absorber as seen from the non-skin surface side. Fig. 8 shows the longitudinal end portion of the diaper 1 on the front region 1F side, but the diaper 1 of the present embodiment has the same structure in the front region 1F and the rear region 1R. Therefore, the front region 1F will be described below, and the description of the rear region 1R will be omitted. As described above, in the present embodiment, the absorbent body 8 is provided with the absorbent core 8c, and the absorbent core 8c has the hourglass-shaped upper layer absorbent pad 8a laminated on the skin surface side and the elongated lower layer absorbent pad 8b laminated on the non-skin surface side. A cover sheet 4 and an inner cover sheet 5 are laminated on the non-skin surface side of the absorber, and linear rubbers 4F1, 4F2, 4F3 are provided between the cover sheet 4 and the inner cover sheet 5. The absorber 8 is indirectly biased by the linear rubbers 4F1, 4F2, 4F3 via the inner cover sheet 5. Further, linear rubbers 4F1, 4F2, 4F3 may be provided between the inner cover sheet 5 and the absorber 8. In this case, the absorber 8 is directly biased by the linear rubbers 4F1, 4F2, 4F3.

Part of the linear rubber 4F2, the arrangement region of which constitutes the waist gather 3R, overlaps with the absorbent body 8, and part thereof overlaps with the absorbent core 8 c. In the present embodiment, each of the upper layer absorbent pad 8a and the lower layer absorbent pad 8b constituting the absorbent core 8c extends to the vicinity of the longitudinal end portion of the absorber 8, and the vicinity of the longitudinal end portion overlaps with the linear rubber 4F 2.

The linear rubber 4F3 has the front body region 1F or the rear body region 1R as a widthwise outer end portion, and the widthwise outer end portion is disposed immediately below the crotch side of the linear rubber 4F 2. The linear rubber 4F3 extends in the crotch direction along the narrowed portion of the cover sheet 4. The arrangement region of the linear rubber 4F3 functions as leg gathers 3LL, 3LR for making the diaper 1 adhere to the thighs of the wearer.

The linear rubber 4F3 overlaps with a part of the absorber at the widened portion of the hourglass-shaped absorbent core 8c at the widthwise inner end portion thereof, at the intermediate portion between the crotch portion and the lengthwise end portion. Here, the inner end portion of the linear rubber 4F3 in the width direction overlaps only the core wrap sheet 7 portion in the absorber 8, but does not overlap, although adjacent to the absorbent core 8 c.

When the diaper 1 is worn by a wearer, the absorbent core 8c is biased outward in the width direction by a part of the linear rubbers 4F2, 4R2 constituting the waist gathers 3R and the linear rubbers 4F3, 4R3 constituting the leg gathers 3LL, 3 LR. These linear rubbers are examples of the stretchable member that is biased in the outer direction from the widthwise end portion in the planar view described in the present application. As a result, the upper absorbent pad 8a is strongly biased in the width direction, and is pressed against the skin surface of the wearer, thereby contracting, and preventing the absorbent core 8c from being deformed due to the pressure applied from both legs.

The step due to the difference in width from the lower absorbent pad 8b mainly occurs on the non-skin side of the upper absorbent pad 8 a. Therefore, the diaper 1 does not generate a step on the skin surface side, and has a good skin feel to the wearer. Further, since the flow path 8s is easily formed on the non-skin surface side, the discharged liquid can be absorbed not only in the generation position but also in the wide range of the absorbent core 8 c.

Further, the linear rubber 4F3 does not overlap the absorbent core 8c in the vicinity of the widthwise inner ends of the leg gathers 3LL, 3LR, and only the backsheet 6 and the lower core wrap sheet 7b are biased to the widthwise outer side. Therefore, a gap due to the tension of the linear rubber 4F3 can be formed between the upper core-wrap sheet 7F and the lower core-wrap sheet 7b, and the flow path 8s can be formed more clearly. Further, if any sheet or pad constituting the absorber is made non-adhesive, the gap can be made larger. For example, in the absorbent core 8c, the upper absorbent pad 8a and the upper core wrap sheet 7f may be bonded to each other, and the lower absorbent pad 8b and the lower core wrap sheet 7b may be bonded to each other so that the absorbent pads are not bonded to each other. In this way, the flow path 8s is easily formed by the urging force of the linear rubber 4F3 acting in the direction in which the pads constituting the absorbent core 8c are separated from each other. Further, since a gap is easily formed between the sheets or pads, the movement of the discharged liquid can be easily performed on the non-skin surface side of the upper absorbent pad 8 a.

In addition, when the wearer's body position changes and pressure is applied to the absorbent core 8c from other directions, a gap may be generated between the upper absorbent pad 8a and the lower absorbent pad 8 b. Since this gap also functions as a flow path for the discharged liquid, the discharged liquid can be guided to the portion of the absorbent core 8c having the residual absorption force, and can be efficiently absorbed.

The position where the linear rubber 4F3 overlaps the absorber is an important part near the excretory opening of the wearer. Here, if the linear rubber 4F3 is superimposed on the absorbent core 8c, the absorbent body 8 itself is distorted by the biasing force of the linear rubber 4F3, and the absorbent core 8c may be deformed, thereby greatly impairing the function. Therefore, the inner end portion in the width direction of the linear rubber 4F3 is preferably provided at a position not overlapping the absorbent core 8 c.

Fig. 9 is a cross-sectional view schematically showing a diaper in which a force is applied near the longitudinal end portions of the absorbent body when worn. Linear rubbers 4F2, 4R2 are provided between the cover sheet 4 and the inner cover sheet 5 near the end in the longitudinal direction of the absorber, and part of them overlaps the absorber 8. When the diaper 1 is worn by a wearer, the diaper 1 follows the body of the wearer by the tension of the linear rubbers 4F2, 4R 2. The non-skin surface side of the absorber is biased toward the non-skin surface side by the tension of the linear rubbers 4F2, 4R 2.

On the other hand, side sheets 10L and 10R are provided on the widthwise side surfaces of the absorber 8, and linear rubbers 10L1 and 10R1 are provided near the skin-surface-side end portions of the side sheets 10L and 10R. The skin surface side end portions of the side sheets 10L, 10R are raised by the urging force of the linear rubbers 10L1, 10R1, and function as three-dimensional gathers 3BL, 3 BR. When the wearer wears the diaper 1, the three-dimensional gathers 3BL and 3BR stand up by the biasing force of the linear rubbers 10L1 and 10R1 and are in close contact with the skin surface of the wearer, thereby preventing lateral leakage of discharged liquid. The biasing force of the linear rubbers 10L1, 10R1 constituting the three-dimensional gathers 3BL, 3BR is transmitted to the absorber 8, whereby the skin surface side of the absorber 8 is biased toward the skin surface side.

The non-skin surface side of the absorber 8 is biased toward the non-skin surface side, and the skin surface side is biased toward the skin surface side, so that the absorber 8 in wear receives a reverse force on the skin surface side and the non-skin surface side. Therefore, the absorber 8 expands in the thickness direction, and the flow path 8s is easily formed inside the absorber 8. By forming the flow path 8s, the discharged liquid can move more easily, and can be efficiently absorbed by the absorbable part in the absorbent core 8 c. Further, by expanding the absorber 8 in the above-described direction, gaps are also generated between the non-bonded structures inside the absorber 8 (for example, between the upper layer absorbent pad 8a and the lower layer absorbent pad 8 b). By forming this gap, the movement of the discharged liquid becomes easier, and the portion having the absorption residual force in the absorbent core 8c is efficiently absorbed.

The absorber 8 is biased at the longitudinal end portion, and changes its shape toward the longitudinal inner side. Therefore, the flow path 8s is easily formed also in a portion other than the vicinity of the longitudinal end portion.

In addition, the absorber 8 may shrink inward and take shape due to the weight of the wearer, the pressure applied from both legs, the forces of the three-dimensional gathers 3BL and 3BR, and the like. By biasing the absorber 8 outward in the width direction by the biasing force of the waist gather 3R and the leg gathers 3LL, 3LR, the absorber 8 can be restrained from contracting and deforming. The forces acting on the waist gather 3R and the leg gathers 3LL, 3LR are naturally distributed over the portion directly overlapping the absorber 8 and over other portions close to the absorber 8, and therefore, the shape can be suppressed over a wide range.

The present embodiment has been described above, but the content of the present utility model is not limited to the above embodiment. In embodiment 2, the absorbent core 8c is described as a laminate of the upper layer absorbent pad 8a and the lower layer absorbent pad 8b, but the absorbent core 8c may be formed by laminating 3 or more absorbent pads. The absorbent core 8c having a shape protruding toward the non-skin surface side may be integrally formed and used.

In embodiment 2, the case where the particles of SAP contained in the absorbent core 8c are mainly contained in the inside of the laminated absorbent pads has been described, but may be disposed between the laminated absorbent pads.

In each embodiment, the linear rubber is used to apply a force to the diaper 1 so as to be in close contact with the skin surface of the wearer, but a stretchable resin fiber may be used.

The embodiments disclosed above can be combined separately.

Claims

1. An absorbent article (1), the absorbent article (1) having a length along a longitudinal direction and a width along a width direction orthogonal to the longitudinal direction, characterized in that,

the absorbent article (1) comprises:

an absorber (8), the absorber (8) including an absorbent core (8 c) and a core wrap sheet (7), the absorbent core (8 c) being of an hourglass shape including a narrowed portion in a crotch portion and extending in the longitudinal direction, the core wrap sheet (7) covering the absorbent core (8 c) and being bonded to the absorbent core (8 c) at least on a skin surface side of the absorbent core (8 c);

a top sheet (9), wherein the top sheet (9) is arranged on the skin surface side of the absorber (8), and the top sheet (9) has a water permeable area; and

And a non-water-permeable back sheet (6), wherein the back sheet (6) is arranged on the non-skin surface side of the absorber (8).

2. Absorbent article (1) according to claim 1, characterized in that,

the absorbent core (8 c) comprises an upper layer absorbent pad (8 a) disposed on the skin surface side and a lower layer absorbent pad (8 b) disposed on the non-skin surface side of the upper layer absorbent pad (8 a),

the core wrap sheet (7) is bonded to the lower absorbent pad (8 b) at least on the non-skin side of the absorbent core (8 c) to cover the absorbent core (8 c),

the lower layer absorbent pad (8 b) is located within the upper layer absorbent pad (8 a) in the width direction when the absorber (8) is viewed in plan.

3. Absorbent article (1) according to claim 2, characterized in that,

the core wrap sheet (7) is not bonded to the upper absorbent pad (8 a) in a region directly opposed to the non-skin surface side.

4. Absorbent article (1) according to claim 1 or 2, characterized in that,

when a force is applied to pull the core-wrap sheet (7) away from the absorbent core (8 c), the non-skin-surface side of the core-wrap sheet (7) and the absorbent core (8 c) is more easily peeled off than the skin-surface side of the core-wrap sheet (7) and the absorbent core (8 c).

5. Absorbent article (1) according to claim 1 or 2, characterized in that,

the absorbent article (1) further comprises a 1 st stretchable member, wherein the 1 st stretchable member is disposed in a region overlapping the absorbent core (8 c), and applies a force to the absorbent core (8 c) from the end in the width direction so that the absorbent core (8 c) is along the skin surface of the wearer.

6. Absorbent article (1) according to claim 2, characterized in that,

the water permeable region of the top sheet (9) is wider at the longitudinal end of the absorber (8) than at the widthwise end of the lower absorbent pad (8 b) and narrower than at the widthwise end of the upper absorbent pad (8 a).

7. Absorbent article (1) according to claim 2, characterized in that,

the absorbent core (8 c) comprises particles of SAP as superabsorbent polymer, the particles of SAP of the lower absorbent pad (8 b) having a lower basis weight than the upper absorbent pad (8 a).

8. Absorbent article (1) according to claim 2, characterized in that,

the upper absorbent pad (8 a) comprises particles of SAP as superabsorbent polymer,

the lower absorbent pad (8 b) does not contain particles of said SAP.

9. Absorbent article (1) according to claim 2, characterized in that,

The upper layer absorbent pad (8 a) has a shape narrowed in the width direction in the crotch region,

the lower layer absorption pad (8 b) is rectangular,

the width of the lower layer absorbent pad (8 b) is less than or equal to the width of the narrowed portion of the upper layer absorbent pad (8 a).

10. Absorbent article (1) according to claim 1 or 2, characterized in that,

the absorbent article (1) further comprises:

an outer body provided on the non-skin surface side of the back sheet (6); and

and a 2 nd stretchable member that stretches and contracts in the width direction at a position closer to the non-skin surface side than the core wrap sheet (7) at an outer side in the width direction of a portion of the outer body where the absorber (8) widens from a crotch region toward an end in the length direction.

11. Absorbent article (1) according to claim 10, characterized in that,

the 2 nd expansion member is not provided at the center of the absorber (8) in the width direction on the rear region side, is provided so as to traverse the absorber (8) in the width direction on the front region side,

the extension region of the 2 nd telescoping member on the front body region side corresponds to the pubic portion of the wearer when worn.

12. Absorbent article (1) according to claim 10, characterized in that,

the absorbent article (1) further comprises side sheets (10L, 10R) covering the lateral sides of the absorber (8), wherein the side sheets (10L, 10R) are provided with a 3 rd stretchable member stretched and contracted along the longitudinal direction on the skin surface side of the absorber (8) to form a three-dimensional gather.

13. Absorbent article (1) according to claim 12, characterized in that,

the back sheet (6) is covered from the non-skin surface side of the absorber (8) to the skin surface side via a side surface portion of the absorber (8) at the end portion of the absorber (8) in the width direction.

14. Absorbent article (1) according to claim 12, characterized in that,

the 2 nd expansion member is configured to apply force so that the outer body is brought into contact with the leg hole direction and the lower abdomen direction of the wearer,

the 3 rd stretchable member is configured to apply a force so as to bring the absorber into contact with the wearer in the front-rear direction,

in the narrowed portion of the absorbent core (8 c), a deflector hole is formed between the outer body and the absorbent core (8 c) and the outer body on the outer side in the width direction of the absorbent core (8 c) due to the difference in the expansion and contraction direction between the 2 nd expansion and contraction member and the 3 rd expansion and contraction member.

15. Absorbent article (1) according to claim 12, characterized in that,

at least one of the top sheet (9) and the side sheets (10L, 10R) is a nonwoven fabric sheet,

at the side surface of the absorber (8), the back sheet (6) is covered with the nonwoven fabric sheet.

16. Absorbent article (1) according to claim 2, characterized in that,

the core wrap sheet (7) is bonded to the upper layer absorbent pad (8 a),

the core wrap sheet (7) is bonded to the lower absorbent pad (8 b),

the upper layer absorbent pad (8 a) and the lower layer absorbent pad (8 b) are non-adhesive.

17. An absorbent article package, characterized in that,

the absorbent article pack includes a plurality of absorbent articles according to claim 1 or 2, and the shape and size of the absorbent body are the same between the 1 st pack including the 1 st absorbent article having the 1 st size and the 2 nd pack including the 2 nd absorbent article having the 2 nd size.