JP2023126005A - Absorbent article - Google Patents

Abstract

An object of the present invention is to provide a technique capable of suppressing three-dimensional gathers from falling inward in the width direction. [Solution] The absorbent article includes an absorbent body, a top sheet, a pair of left and right dew-proof sheets, an exterior body, and a non-adhesive area where the absorbent body and the exterior body are non-adhesive, and is leak-proof. The sheet includes a proximal end side piece, a bent portion, a free end side piece extending widthwise outward from the bent portion, and a base that fixes each of both longitudinal ends of the proximal side piece to the top sheet. an end fixing part; a free end fixing part fixing each of the longitudinal ends of the free end side piece to the proximal end side piece; and a free end fixing part that is bonded to the free end side piece in an elongated state and extends in the longitudinal direction. a plurality of elastic members, the distance between the free end fixing parts on both sides in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction, and among the plurality of elastic members, the distance between the free end fixing parts on both sides is longer than the inner side in the width direction, and The elongation rate of the elastic member placed on the inner side in the width direction is lower than the elongation rate of the elastic member disposed on the inner side in the width direction. [Selection diagram] Figure 4

Description

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers, urine pads, and sanitary products have been developed (see, for example, Patent Document 1). Patent Document 1 discloses a diaper including three-dimensional gathers.

JP 2019-115459 Publication

Absorbent articles generally include three-dimensional gathers to suppress side leakage of exudates. The three-dimensional gathers rise up toward the wearer's skin due to the contraction force of the rubber thread, coming into contact with the wearer's skin and suppressing side leakage of waste. However, if the three-dimensional gathers do not stand up toward the skin surface but fall inward in the width direction, a gap will be created between the three-dimensional gathers and the skin surface, and there is a risk that discharged substances may leak from this gap.

An object of the present invention is to provide a technique that can prevent three-dimensional gathers from falling inward in the width direction.

In order to solve the above problems, the present invention provides a free end fixing portion that fixes each of the longitudinal ends of the free end side piece of the leakproof sheet to the base end side piece.

Specifically, the absorbent article according to the present invention is an absorbent article having a length along a longitudinal direction and a length along a width direction perpendicular to the longitudinal direction, and is provided at a position including the crotch area. an absorbent body capable of absorbing liquid discharged by a wearer; a top sheet having a water-permeable region provided on the skin side of the absorbent body; and a top sheet extending in the longitudinal direction and outward from the center in the width direction. a pair of left and right dew-proof sheets disposed on the wearer's body, an exterior body disposed on the non-skin side of the wearer relative to the absorbent body, and the absorbent body and the exterior body are not bonded to each other in the crotch area. a non-adhesive region provided at least at both ends in the width direction, and the leak-proof sheet is a non-water permeable sheet disposed on the skin side of the top sheet. , a proximal end side piece joined to the top sheet, a bent portion bent from the proximal end side piece toward the skin surface side and outward in the width direction, and extending outward from the bent portion in the width direction. a free end side piece, a base end fixing part that fixes each of the longitudinal ends of the base end side piece to the top sheet, and a proximal end fixing part that fixes each of the longitudinal ends of the free end side piece to the top sheet; a free end fixing part fixed to the proximal end side piece; and a plurality of elastic members that are bonded to the free end side piece in an elongated state and extend in the longitudinal direction, and are spaced apart from each other in the width direction. a plurality of elastic members disposed such that the distance between the free end fixing portions on both sides in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction; Among the members, the stretch rate of the stretchable member arranged on the outside in the width direction is lower than the stretch rate of the stretchable member arranged on the inside in the width direction.

In the above absorbent article, among the plurality of elastic members, the elastic region of the elastic member disposed closest to the inner side in the width direction may be shorter than the elastic region of the elastic member disposed furthest to the outer side in the width direction. good.

In the above absorbent article, among the plurality of elastic members, the elongation rate of the elastic member disposed furthest in the width direction is greater than the elongation rate of the elastic member disposed furthest outside in the width direction, and The elastic member disposed most inward in the width direction may be disposed along the folded portion so as to be in contact with the folded portion.

In the above absorbent article, the non-adhesive region may be provided in a region of the crotch region corresponding to the urethral opening of the wearer.

In the above absorbent article, the adhesive portion of the absorbent body and the exterior body is disposed adjacent to the non-adhesive region in the width direction, and is on the skin surface side of the dew-proof sheet when viewed from above. The adhesive may be provided with an adhesive portion that is approximately parallel to the upright line.

In the above absorbent article, the non-adhesive region is provided continuously from one end side in the width direction to the other end side, and is adjacent to the non-adhesive region in at least one of the longitudinal direction. The adhesive part is provided at a central part in the width direction, and when viewed from above, both ends in the width direction are provided at the center part in the width direction. The dew-proof sheet may extend substantially parallel to the upright line toward the skin surface side.

The above-mentioned absorbent article may include a groove formed in the absorbent body including the crotch area, and provided approximately parallel to an upright line of the dew-proof sheet toward the skin surface side.

In the absorbent article described above, the grooves may be provided substantially parallel to respective upright lines of the pair of left and right dew-proof sheets toward the skin surface side.

In the above absorbent article, the groove may be a compressed groove.

According to the present invention, it is possible to suppress the three-dimensional gathers from falling inward in the width direction.

FIG. 1 is a perspective view of a diaper according to an embodiment. FIG. 2 is an exploded perspective view of the diaper according to the embodiment. FIG. 3 is a developed view of the diaper according to the embodiment. FIG. 4 is a cross-sectional view of the diaper according to the embodiment taken along line AA in FIG. 3 in the width direction. FIG. 5 is a plan view showing a back sheet, an absorbent core, a top sheet, and a side sheet extracted from the diaper according to the embodiment. FIG. 6 is a cross-sectional view of the diaper according to the embodiment taken along line BB in FIG. FIG. 7 is a plan view of the diaper according to the embodiment when viewed from the skin side. FIG. 8 is a plan view of the diaper according to the embodiment when viewed from the skin side. FIG. 9 is a plan view of the diaper according to the embodiment when viewed from the skin side. FIG. 10 is a plan view of the absorbent body of the diaper according to the embodiment when viewed from the skin side. FIG. 11 is a plan view showing a back sheet, an absorbent core, a top sheet, and a side sheet extracted from a diaper according to Modification 1 of the embodiment. FIG. 12 is a cross-sectional view of the three-dimensional gathers of the diaper according to Modification 2 of the embodiment, cut in the width direction.

<Embodiment>
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Diapers according to embodiments of the present invention will be described below with reference to the drawings. Note that the configurations of the following embodiments are illustrative, and the present invention is not limited to the configurations of these embodiments.

FIG. 1 is an example of a perspective view of a pants-type disposable diaper for adults (hereinafter simply referred to as "diaper") according to an embodiment. In a diaper, the longitudinal direction (also referred to as the front-rear direction) is the direction that connects the front body, which is arranged to face the wearer's abdomen, and the back body, which is arranged to face the wearer's back. Between the front body (on one side in the longitudinal direction) and the back body (on the other side in the longitudinal direction) (at the center in the longitudinal direction) is an inseam that is placed at the wearer's crotch (located opposite the crotch). Department is located. Further, when the diaper is worn by a wearer, the side facing the wearer's skin is defined as the skin side, and the side opposite to the skin side is defined as the non-skin side. Further, the direction connecting the skin side and the non-skin side is defined as the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is defined as the width direction (also referred to as the left-right direction). In addition, viewing from the thickness direction is considered to be a planar view. The diaper 1 has a length along the longitudinal direction and a length along the width direction perpendicular to the longitudinal direction, and is worn on the wearer's crotch. Moreover, the terminology used in this application regarding direction shall mean the direction 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 left-right direction refers to the direction that corresponds to the left and right sides of the wearer when the diaper 1 is worn by the wearer.

In this embodiment, as an example of an absorbent article, a cylindrical structure having a waist opening through which the wearer's abdominal circumference can be inserted and a pair of left and right leg openings through which the wearer's left and right lower legs can be inserted. A pants-type disposable diaper is illustrated. Furthermore, in this embodiment, a pants-type disposable diaper for adults 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.

The diaper 1 has an inseam region 1B that corresponds to the crotch region that covers the genitals (inseam) of the wearer when worn, and a region that corresponds to the front body of the wearer's waist and covers the abdomen side of the wearer. It has a front body region 1F for covering the wearer's back, and a back body region 1R for covering the back side of the wearer, which corresponds to the back body in the wearer's torso. 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 to each other, and the right edge of the front body region 1F and the back body region The right edges of the region 1R are joined together. Therefore, in the diaper 1, a torso opening 2T (waist opening) is formed by the upper edge of the front body region 1F and the upper edge of the rear body region 1R. In addition, the diaper 1 has a left lower leg opening 2L (leg opening) formed on the left side of the crotch area 1B that is not joined, and a right lower leg opening 2R (leg opening) on the right side of the crotch area 1B. A round opening) is formed. The diaper 1 is configured 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 area 1F is placed on the wearer's abdomen side, the back body area 1R is placed on the wearer's back side, and the left lower leg opening 2L and right lower leg opening 2R are placed on the wearer's thigh. It is fixed to the wearer's body in a state surrounding the body. 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, absorbent bodies capable of absorbing and retaining liquid are arranged mainly around the crotch region 1B. The diaper 1 also includes a left lower leg opening that surrounds the thigh of the wearer's left lower leg in order to prevent a gap from forming between the diaper 1 and the wearer's skin as a liquid outflow path. Three-dimensional gathers 3BL are provided in 2L, three-dimensional gathers (not shown) are provided in the right lower leg opening 2R surrounding the thigh of the wearer's right lower leg, and waist gathers 3R and tummy gathers are provided in the region surrounding the wearer's abdominal circumference. 12 are provided. Further, leg gathers 3LF and 3LR (leg gathers 3LR are not shown in FIG. 1) are provided at positions surrounding the base of the wearer's legs. Note that the leg gathers 3LF are provided in the front body region 1F, and the leg gathers 3LR are provided in the back body region 1R. In FIG. 1, only the leg gathers 3LF are illustrated. The three-dimensional gathers 3BL, 3BR and the waist gathers 3R are contracted by the elastic force of the elastic member and are brought into close contact with the wearer's skin. Further, the leg gathers 3LF and 3LR prevent a gap from being created between the wearer's groin and the diaper 1. Therefore, the liquid discharged from the wearer's genitals is absorbed into the absorbent body of the diaper 1 without leaking from the diaper 1.

Note that the diaper 1 can be used in combination with an inner pad (not shown). The inner pad is a generally rectangular absorbent article that includes an absorbent body and absorbs the wearer's exudate. When the diaper 1 and the inner pad are used in combination, the inner pad is placed on the skin side of the diaper 1 so as to come into contact with the wearer's discharge hole. The drained liquid is first absorbed by the inner pad, and only the drained liquid that cannot be absorbed by the inner pad reaches the absorbent body of the diaper 1 and is further absorbed. Therefore, even if the amount of discharged liquid is large, leakage of the discharged liquid from the diaper 1 can be prevented. Further, if the amount of drained liquid is small and the inner pad can absorb all of it, even if the drained liquid is drained, only the inner pad needs to be replaced, which can reduce the cost of assistance. Moreover, the diaper 1 can be used for a long time by reducing the frequency of changing the diaper 1.

FIG. 2 is an example of an exploded perspective view of the diaper 1 according to the embodiment. The diaper 1 has a cover sheet (outer cover sheet) 4 and an inner cover sheet 5. The cover sheet 4 and the inner cover sheet 5 are approximately 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 are the same shape and almost the same size. When worn by a wearer, the cover sheet 4 is laminated on the wearer's non-skin side, and the inner cover sheet 5 is laminated on the wearer's skin side. An elastic member for forming waist gathers 3R, tummy gathers 12, and leg gathers 3LF and 3LR is provided between the cover sheet 4 and the inner cover sheet 5. In this embodiment, a rubber thread is used as the elastic member. Note that as the elastic member, an elastic member such as a band-shaped rubber can be appropriately selected in place of the rubber thread.

The cover sheet 4 and the inner cover sheet 5 may be made of, for example, a nonwoven fabric made of a liquid-impermeable thermoplastic resin in order to suppress leakage of waste materials. Here, examples of the liquid-impermeable thermoplastic resin include polyethylene (PE) and polypropylene (PP). Hereinafter, the absorbent body 8 and the combination of the absorbent body 8 with the back sheet 6, top sheet 9, and side sheets 10L and 10R will be referred to as an interior body, and as a concept corresponding to the interior body, the cover sheet 4 on which rubber thread is arranged and Together with the inner cover sheet 5, it may be expressed as an exterior body (an example of the "exterior body" of the present disclosure).

The diaper 1 includes a backsheet 6, an absorbent body 8, and a topsheet 9, which are laminated in this order on the wearer side surfaces of a cover sheet 4 and an inner cover sheet 5. The back sheet 6 is a substantially rectangular sheet that has a length in the longitudinal direction that reaches from the front body of the wearer via the crotch to the back body, and has a predetermined width in the width direction perpendicular to the longitudinal direction. . The absorbent body 8 and the top sheet 9 are both sheet-like members having a substantially rectangular appearance like the back sheet 6, and are placed against the back sheet 6 with their longitudinal directions matching the longitudinal direction of the back sheet 6. They are stacked in order. The back sheet 6 is a sheet made of liquid-impermeable thermoplastic resin in order to suppress leakage of discharged materials. Further, the back sheet 6 is provided with minute holes 66. The holes 66 allow ventilation while preventing liquid permeation. The holes 66 are provided, for example, in a region that overlaps with the absorbent body 8. Further, the top sheet 9 is a sheet-like member that is placed on the wearer's skin side so as to cover the water-absorbing surface of the absorbent body 8. This top sheet 9 has liquid permeability in part or in whole. Therefore, when the diaper 1 is worn, liquid discharged from the wearer passes through the top sheet 9 that can come into contact with the wearer's skin, enters the absorbent body 8, and is absorbed there. Examples of liquid permeable sheets include woven fabrics, nonwoven fabrics, and porous films. Moreover, the top sheet 9 may have hydrophilicity.

The absorbent body 8 has an absorbent core 8c made of one or more mats, and a core wrap sheet 7 (water-permeable sheet) that wraps around the absorbent core 8c. In this embodiment, as shown in FIG. 2, the absorbent core 8c has an upper absorbent mat 8a and a lower absorbent mat 8b. The upper layer absorbent mat 8a has a substantially hourglass shape with a constricted portion, and the lower layer absorbent mat 8b has a rectangular shape. Further, the width of the lower absorbent mat 8b is approximately the same as the width of the constricted portion of the upper absorbent mat 8a. The absorbent core absorbs water into the gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers made of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been subjected to hydrophilic treatment. It has a structure that holds particulate absorbent resin (polymer absorbent material) such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a crosslinked structure that can absorb and retain it. When the absorbent core 8c absorbs the liquid discharged from the wearer, it swells the absorbent resin held in the gaps within the short fibers and retains the liquid within the short fibers. In this embodiment, the upper layer absorbent mat 8a has a substantially hourglass shape with a constricted central portion. The absorbent core 8c can have an appropriate shape depending on 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 above-mentioned absorbent core 8c becomes difficult to mix into other structures. Moreover, deformation of the absorbent core 8c is suppressed. The core wrap sheet 7 can be made of pulp fiber, and tissue paper can be used as an example. The core wrap sheet 7 may be a single sheet, but includes an upper sheet placed on the wearer's skin side, and a lower sheet placed on the wearer's non-skin side and wrapped around the side of the absorbent core and the skin side. The sheet may be composed of two sheets. When the core wrap sheet 7 is composed of two sheets, a structure in which the widthwise end of the upper sheet is wrapped by other sheets (for example, side sheets 10L, 10R, back sheet 6, and top sheet 9, which will be described later) It may be . Note that the absorbent body 8 is wrapped in the back sheet 6 and the top sheet 9, and since these sheets can also prevent the absorbent body from losing its shape, the core wrap sheet 7 may not be provided.

The backsheet 6, absorbent core 8, and topsheet 9 all extend from the front body region 1F to the back body region 1R. Therefore, when the backsheet 6, absorbent body 8, and topsheet 9 are laminated to cover the wearer's genitals (crotch), both longitudinal ends of the backsheet 6, absorbent body 8, and topsheet 9 are covered by the wearer's genitals. It is located on the ventral and dorsal sides of the body. That is, the wearer's genitals are covered with the absorbent body 8 from the ventral side to the back side of the wearer. Therefore, even if the wearer discharges the liquid from the body in either a posture with the belly facing down or a posture with the back facing downward, the discharged liquid will come into contact with the absorbent body 8 via the top sheet 9. I will do it.

Further, between the back sheet 6 and the core wrap sheet 7, a rubber thread 4F7 is provided at the center in the width direction, extending in the longitudinal direction from the front body region 1F to the crotch region 1B. The rubber thread 4F7 is bonded to the backsheet 6, and is bonded to the inner cover sheet 5 and the cover sheet 4 via the backsheet 6. The rubber thread 4F7 exerts a force that causes the inner cover sheet 5 and the cover sheet 4 to contract in the longitudinal direction. Note that the region where the thread rubber 4F7 is provided is preferably a region where the absorbent body 8 and the inner cover sheet 5 are not bonded, but it is preferable that the region where the absorbent body 8 and the inner cover sheet 5 are bonded. Good too. Note that the rubber thread 4F7 may be provided between the cover sheet 4 and the inner cover sheet 5.

Moreover, a thread rubber cover sheet 13 (expandable member cover sheet) is arranged on the skin side of the thread rubber 4F7. The rubber thread cover sheet 13 is adhered to the back sheet 6, covering the rubber thread 4F7 from the skin side. The rubber thread cover sheet 13 is arranged between the rubber thread 4F7 and the absorbent body 8. Moreover, the thread rubber cover sheet 13 is not adhered to the core wrap sheet 7 of the absorbent body 8. The rubber thread 4F7 is disposed between the absorbent body 8 and the backsheet 6, is adhered to the backsheet 6, and is not adhered to the absorbent body 8. This prevents the elastic force (contractile force) of the rubber thread 4F7 from acting on the absorbent body 8, and prevents the absorbent body 8 from deforming. In addition, when replacing with the thread rubber 4F7 and using a belt-shaped elastic member, the elastic member and the core wrap sheet 7 can be made non-adhesive without providing the thread rubber cover sheet 13. Further, in this embodiment, the thread rubber cover sheet 13 is formed to have the same length as the back sheet 6. The thread rubber cover sheet 13 may be formed with a length that matches the extending area of the thread rubber 4F7, or may be formed to be longer than the extending area of the thread rubber 4F7 and shorter than the back sheet 6. Good too.

Moreover, the diaper 1 has long and narrow band-shaped 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. Three rubber threads 10L1 and 10R1 (an example of "a plurality of elastic members" in the present disclosure) are bonded to the side sheets 10L and 10R in a stretched state along 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 to each other, and the front body region 1F of the cover sheet 4 is When the diaper 1 is in the completed state as shown in FIG. 1, the side sheet 10L, 10R is drawn in the longitudinal direction by the contraction force of the rubber threads 10L1 and 10R1 and rises from the top sheet 9 along the folding lines 10L2 and 10R2. As a result, three-dimensional gathers 3BL and 3BR are formed that prevent liquid from flowing out from the left lower limb opening 2L and the right lower limb opening 2R.

Here, in the side sheets 10L and 10R, when the three-dimensional gathers 3BL and 3BR are formed, the interval in the width direction between the respective standing lines of the three-dimensional gathers 3BL and 3BR is provided to such an extent that an inner pad can fit therein. Note that the method of joining the edges 4F4 and 4R4, and the edges 4F5 and 4R5 is not particularly limited, but can be performed by, for example, heat sealing, high frequency sealing, ultrasonic sealing, or the like.

Furthermore, the diaper 1 includes an end sheet 11F that is laminated on the wearer side surface in the front body region 1F of the cover sheet 4, sandwiching the back sheet 6, the absorbent body 8, the top sheet 9, and the side sheets 10L and 10R. It has an end sheet 11R that is laminated on the wearer side surface in the rear body region 1R of the cover sheet 4. The end sheets 11F and 11R are strip-shaped sheets that are stacked on 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 sheets 11F and 11R are non-water permeable non-woven fabrics, and mainly reinforce the cover sheet 4 and the inner cover sheet 5 at the region of contact around the waist of the diaper 1. Moreover, an adhesive is applied to each of the end sheets 11F and 11R, and the end sheets 11F and 11R are bonded to the inner cover sheet 5 by the adhesive. The end sheets 11F and 11R are placed closer to the skin side than the laminate formed by the back sheet 6, absorbent body 8, top sheet 9, and side sheets 10L and 10R, and are worn with the ends of the laminate in direct contact with the skin surface. prevent people from feeling uncomfortable.

FIG. 3 is an example of a diagram schematically showing a state in which the diaper 1 according to the embodiment is unfolded and stretched. FIG. 3(A) schematically shows the internal structure of the diaper 1 in an expanded and stretched state when viewed from the left side. FIG. 3(B) schematically shows a plan view of the diaper 1 in an expanded and stretched state.

As shown in FIG. 3, the rubber thread 4F3 forming the leg gathers 3LF is located on the front body region 1F side of the right lower leg opening 2R and the left lower leg opening 2L, into which the wearer's legs enter when the diaper 1 is assembled. It is placed along the edge. The rubber thread 4F3 is bonded to the cover sheet 4 and the inner cover sheet 5 in a stretched state. The rubber thread 4F3 is provided so as to cross in the left-right direction in the crotch region 1B on the front body side. In the places where the rubber thread 4F3 is provided so as to cross in the left-right direction, the rubber thread 4F3 and the absorbent body 8 overlap in the thickness direction of the diaper 1. Further, the widthwise central portion of such a transverse region corresponds to the urethral opening of the wearer when the diaper 1 is worn. In addition, in the area|region where the absorber 8 overlaps in the thickness direction, the arrangement|positioning form of the thread rubber 4F3 is not limited to crossing as shown in FIG. 3. It is sufficient that the extending direction of the rubber thread 4F3 has a widthwise component, and preferably the widthwise component of the extending direction of the thread rubber 4F3 is larger than the longitudinal component.

On the other hand, the rubber thread 4R3 forming the leg gathers 3LR is provided along the edges of the right lower leg opening 2R and the left lower leg opening 2L on the rear body region 1R side. The rubber thread 4R3 is bonded to the cover sheet 4 and the inner cover sheet 5 in a stretched state. In the crotch area 1B on the rear body side, the tip of the rubber thread 4R3 faces in the width direction. However, the rubber thread 4R3 is cut at the center in the width direction, and the rubber thread 4R3 on the left side and the rubber thread 4R3 on the right side are not connected.

Further, the inner cover sheet 5 and the absorbent body 8 are appropriately bonded with adhesive via the back sheet 6 from the front body region 1F to the back body region 1R. However, as shown in FIG. 3, the inner cover sheet 5 and the absorbent core 8 are not bonded to each other in a region crossed by the rubber thread 4F3 in the front body region 1F (referred to as a non-bonded region 15). Actually, in the non-adhesive region 15, the inner cover sheet 5 and the back sheet 6 are non-adhered. In this embodiment, the non-adhesive area 15 is provided throughout the overlapping area of the crotch area 1B where the thread rubber 4F3 and the absorbent core 8 overlap.

Further, as shown in FIG. 3, the rubber thread 4F7 is provided at the center in the width direction between the back sheet 6 and the core wrap sheet 7, extending in the longitudinal direction from the front body region 1F to the crotch region 1B. . Actually, the rubber thread 4F7 is provided between the back sheet 6 and the rubber thread cover sheet 13 (not shown in FIG. 3). Note that the area closer to the crotch region 1B than the thread rubber 4F7 corresponds to the wearer's anus when the wearer wears the diaper 1. Further, the absorbent body 8 is compressed in a linear manner so as to surround the rubber thread 4F7, and is displayed as a line 14 in FIG. 3. The line 14 is provided in the width direction at the end on the crotch region 1B side. Further, the line 14 is bent outward in the width direction at the end on the front body region 1F side. Note that such compression of the absorbent body 8 is realized by embossing it with a roller, for example.

One end of the cover sheet 4 is folded back along folding lines 4FF and 4RF shown in FIG. The above-mentioned waist gathers 3R are bonded to the front body region 1F of the cover sheet 4 with thread rubber (thread-like rubber) 4F1 in a stretched state, and to the back body region 1R of the cover sheet 4, thread rubber (thread-like rubber) 4R1 is bonded to the front body region 1F of the cover sheet 4. It is formed by gluing it in a stretched state. The rubber threads 4F1 and 4F2 are provided in the order of the rubber thread 4F1 and the rubber thread 4F2 from the folding line 4FF side along the folding line 4FF which will form the upper edge of the front body region 1F when folded back. Similarly, the tummy gathers 12 are bonded to the front body region 1F of the cover sheet 4 with the rubber thread 4F2 stretched, and to the back body region 1R of the cover sheet 4 with the rubber thread 4R2 stretched. It is formed by Similarly to the rubber threads 4F1 and 4F2, the rubber threads 4R1 and 4R2 are also folded from the folding line 4RF side along the folding line 4RF that forms the upper edge of the back body region 1R when folded back. They are arranged in this order.

Therefore, the rubber threads 4F1 and 4F2 are provided on the cover sheet 4 such that the longitudinal direction, which is the direction of expansion and contraction, is in the left-right direction of the diaper 1. Further, the rubber threads 4R1 and 4R2 are provided on the cover sheet 4 such that the longitudinal direction, which is the direction of expansion and contraction, is oriented in the left-right 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 thread rubber 4F1, 4F2 and the thread rubber 4R1, 4R2 form a substantially annular shape that goes around the trunk opening 2T. It forms a telescopic member and exhibits the function of contracting the trunk opening 2T in the direction of the waist circumference. That is, the rubber threads 4F1, 4F2 and the rubber threads 4R1, 4R2 exhibit contractile 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 wearer's abdominal circumference. The rubber thread 4F2 and the rubber thread 4R2 overlap with the absorbent core 8 in a part of the crotch region 1B side.

The rubber threads 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 rubber threads 4F2 and 4R2 are provided in parallel with a predetermined interval. The rubber threads 4F1 and 4R1 relatively strongly tighten the abdominal circumference of the wearer above the rubber threads 4F2 and 4R2 when the diaper 1 is worn. The rubber threads 4F1 and 4R1 have the function of keeping the diaper 1 in close contact with the wearer to prevent the wearer from shifting the wearing position, and to prevent fluid from leaking from the abdomen or back. The rubber threads 4F2 and 4R2 relieve the feeling of pressure on the wearer caused by the contraction force of the rubber threads 4F1 and 4R1.

The cover sheet 4 is folded back along folding lines 4FF and 4RF and extends to the region where the rubber thread 4F1 and the rubber thread 4R1 are arranged, and the folded portion reinforces the region where the rubber thread 4F1 and the rubber thread 4R1 are arranged. . The end sheets 11F and 11R (see FIG. 2) are provided in the arrangement area of 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.

Note that in the present application, the state in which the sheets overlap is not limited to a state in which the sheets are overlapped in full contact with each other, but is a concept that includes a state in which parts of the sheets overlap. For example, the end sheets 11F are stacked such that a portion of one end in the longitudinal direction of the back sheet 6 touches a portion of the cover sheet 4. The diaper 1 is formed by stacking a back sheet 6 and a top sheet 9 with an absorbent body 8 between them, as well as a cover sheet 4, end sheets 11F and 11R, an inner cover sheet 5, and side sheets 10L and 10R. , it can be said that it has a laminate in which a plurality of these sheets are stacked.

Next, the side sheets 10L and 10R (an example of the "dewproof sheet" in the present disclosure) will be described in more detail using FIGS. 4 to 6. FIG. 4 is a diagram schematically showing a cross-sectional structure taken along line AA in FIG. 3. FIG.

The side sheets 10L and 10R are non-water permeable nonwoven fabric sheets disposed on both sides of the absorbent core 8 in the width direction, and are a pair of left and right sheets that cover the side surfaces of the absorbent core 8 in the width direction. The side sheets 10L and 10R further rise toward the skin side at the skin side end portions of the absorbent body 8 to form three-dimensional gathers 3BL and 3BR that prevent side leakage of waste. On the skin side of the absorbent body 8, the side sheets 10L and 10R are laminated closer to the skin side than the top sheet 9.

The side sheets 10L, 10R for forming the three-dimensional gathers 3BL, 3BR are arranged outside the center of the diaper 1 in the width direction, and are arranged closer to the skin side than the top sheet 9. A hot melt adhesive is applied between the top sheet 9 and the side sheets 10L and 10R so as to extend along the longitudinal direction of the diaper 1. The water-impermeable parts 31L and 31R are formed of a water-impermeable hot melt adhesive. The non-water-permeable portions 31L, 31R prevent liquid from entering between the side sheets 10L, 10R and the top sheet 9, thereby suppressing liquid from leaking from the ends of the diaper 1 in the width direction. The non-water permeable parts 31L and 31R are formed from the front body region to the back body region so as to extend in the longitudinal direction of the diaper 1. Thereby, the diaper 1 can suppress lateral leakage from any position of the width direction end portion. Further, the side sheets 10L and 10R cover the widthwise ends of the top sheet 9 and the back sheet 6. Thereby, even if liquid permeates toward the ends in the width direction rather than the non-water permeable portions 31L and 31R, the diaper 1 can suppress side leakage.

Further, the three-dimensional gathers 3BL and 3BR stand up toward the skin side with folding lines 10L2 and 10R2 (see FIG. 4) formed at positions overlapping the top sheet 9 as boundaries. The folding lines 10L2, 10R2 are formed on the inner side in the width direction of the diaper 1 than the non-water permeable parts 31L, 31R along the widthwise inner ends of the non-water permeable parts 31L, 31R. In other words, the non-water permeable parts 31L and 31R are provided on the outer side in the width direction of the diaper 1 than the folding lines 10L2 and 10R2. Since the non-water permeable parts 31L and 31R are formed of hot melt adhesive, the regions where these non-water permeable parts are formed are harder than in the case where the non-water permeable parts are not provided. In the diaper 1 according to the present embodiment, since the side sheets 10L and 10R are arranged closer to the skin surface than the non-water permeable parts 31L and 31R, these non-water permeable parts do not come into direct contact with the wearer's skin. , it is possible to prevent the non-water permeable portion from touching the skin surface and causing discomfort to the wearer.

In addition, when the side sheets 10L and 10R are folded toward the top sheet 9 side as shown in FIG. 3BL1, 3BR1, bent portions 3BL2, 3BR2, and free end side piece 3BL3 that is bent outward in the width direction of the diaper 1 from the proximal end side pieces 3BL1, 3BR1 by the bent portions 3BL2, 3BR2, and extends outward in the width direction. , 3BR3, and free end portions 3BL4, 3BR4 provided at the tips of the free end side pieces 3BL3, 3BR3.
The base end side pieces 3BL1, 3BR1, the bent portions 3BL2, 3BR2, the free end side pieces 3BL3, 3BR3, and the free end portions 3BL4, 3BR4 are provided from the front body region 1F to the back body region 1R. There is.

A plurality of rubber threads 10L1, 10R1 are provided which are bonded in an elongated state to the free end side pieces 3BL, 3BR of the side sheets 10L, 10R and extend in the longitudinal direction of the diaper 1. The plurality of rubber threads 10L1 and 10R1 are arranged at intervals in the width direction of the diaper 1. The side sheets 10L, 10R form three-dimensional gathers 3BL, 3BR by rising toward the skin side at the bending lines 10L2, 10R2 due to the elastic force of the rubber threads 10L1, 10R1. The bending lines 10L2 and 10R2 serve as standing lines when the three-dimensional gathers 3BL and 3BR stand up. The side sheets 10L, 10R come into contact with the wearer's skin from the bent portions 3BL2, 3BR2 to the free ends 3BL4, 3BR4. Of the side sheets 10L, 10R, the base end side pieces 3BL1, 3BR1, the bent portions 3BL2, 3BR2, the free end side pieces 3BL3, 3BR3, the free end portions 3BL4, 3BR4, and the rubber threads 10L1, 10R1, It constitutes three-dimensional gathers 3BL and 3BR.

FIG. 5 is a plan view showing the backsheet 6, absorbent core 8c, topsheet 9, and sidesheets 10L and 10R extracted from the diaper 1 according to the present embodiment. FIG. 6 is a cross-sectional view of a cross section including the top sheet 9 and the side sheet 10L taken along the line BB in FIG. The free end fixing portions of the three-dimensional gathers 3BL, 3BR provided at the longitudinal ends of the diaper 1 will be explained using FIG. 6 while referring to FIG. 5. Hereinafter, the free end fixing part of the side seat 10L will be explained, but the same applies to the free end fixing part of the side seat 10R, so the explanation thereof will be omitted.

The diaper 1 includes, at its longitudinal end, a proximal adhesive part 35 (an example of a "proximal fixing part" in the present disclosure) that adheres the proximal side piece 3BL1 and the top sheet 9, and a free end side piece 3BL3. and a free end adhesive portion 36 (an example of a “free end fixing portion” in the present disclosure) that adheres to the base end side piece 3BL1. The side sheet 10L is fixed to the top sheet 9 at each end in the longitudinal direction of the diaper 1 by a proximal adhesive portion 35 in order to stand up on the skin surface side except at the longitudinal ends. The three-dimensional gathers 3BL stand up toward the skin side with the folding line 10L2 shown in FIG. 4 as a boundary in a region where the proximal adhesive portion 35 is not formed. In addition, the proximal end adhesive part 35 constitutes the longitudinal direction end part side of non-water permeable parts 31L and 31R. The proximal adhesive portion 35 is formed to be wider than the non-water permeable portions 31L and 31R located closer to the center in the longitudinal direction than the proximal adhesive portion 35.

Further, the free end adhesive portions 36 are provided at each end of the diaper 1 in the longitudinal direction. Here, the distance between the free end adhesive parts 36 on both sides (front and back) in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction. In FIG. 5, the distance on the outside in the width direction is shown as D1, and the distance on the inside in the width direction is shown as D2. Hereinafter, the distance D1 will be referred to as the "outer distance D1" and the distance D2 will be referred to as the "inner distance D2."

Since the free end adhesive portion 36 is formed so that the outer side in the width direction is shorter at the center side in the longitudinal direction than the inner side in the width direction, the outer distance D1 is longer than the inner distance D2. Thereby, in the longitudinal direction of the diaper 1, the free end portion 3BL4 side, which is the outer side in the width direction, of the side sheet 10L easily stands up on the skin surface side. Thereby, the diaper according to the present embodiment can easily make the free end portion 3BL4 of the three-dimensional gathers 3BL stand up.

Moreover, among the three rubber threads 10L1, the elongation rate of the rubber thread 10L1 placed on the outside in the width direction of the diaper 1 is lower than the elongation rate of the rubber thread 10L1 placed on the inside of the diaper 1 in the width direction. Here, the elongation rate is the draft rate. The draft rate (%) of the rubber thread is expressed as a percentage of the length (cut length) when the rubber thread is assembled into a diaper divided by the natural length of the rubber thread. The rubber thread 10L1 is assembled into the diaper 1 in a stretched state in order to exhibit contractile force. Therefore, the draft rate becomes a value larger than 100%. In the diaper 1 according to the present embodiment, the elongation rate of the rubber thread 10L1 disposed on the outer side in the width direction is lower than the elongation rate of the rubber thread 10L1 disposed on the inner side in the width direction. is contracted more than the outer region, and the outer region is prevented from falling inward in the width direction than the inner region, that is, the free end portion 3BL4 of the three-dimensional gathers 3BL is suppressed from falling toward the top sheet 9 side.

As described above, in the diaper according to the present embodiment, the outer distance D1 is longer than the inner distance D2, and the elongation rate of the rubber thread 10L1 arranged on the outer side in the width direction is lower than that of the thread arranged on the inner side in the width direction. By making the elongation rate lower than that of the rubber 10L1, the free end 3BL4 side can be easily made to stand up, thereby making it possible for the free end side piece 3BL3 from the folded part 3BL2 side to the free end 3BL4 side to be in contact with the wearer's skin. The three-dimensional gathers 3BL can be made to stand up so that they are in contact with each other.

Note that the base end adhesive portion 35 and the free end adhesive portion 36 are formed by applying hot melt adhesive. Although the illustration of the proximal adhesive part 35 is omitted in FIG. 5, the longitudinal extension range of the proximal adhesive part 35 is approximately the same as the longitudinal extension range of the free end adhesive part 36 on the inner side in the width direction. It's the same.

<Adhesion form 1>
Next, the form of adhesion between the absorbent body 8 and the exterior body in this embodiment will be explained using FIGS. 7 to 10. First, adhesive form 1 will be explained using FIG. 7. FIG. 7 is a plan view of the diaper 1 viewed from the skin side. As shown in FIG. 7, in the crotch region 1B, a non-adhesive region 15 is provided where the absorbent core 8 and the inner cover sheet 5 are non-adhesive. The non-adhesive area 15 is continuously provided from one end to the other end of the diaper 1 in the width direction. An adhesive area 16 where the absorbent body 8 and the inner cover sheet 5 are bonded is provided on the front body area 1F side of the non-adhesive area 15, and an adhesive area 16 where the absorbent body 8 and the inner cover sheet 5 are adhered is provided on the back body area 1R side of the non-adhesive area 15. An adhesive area 17 is provided where the inner cover sheet 5 and the inner cover sheet 5 are adhered. Although the adhesive regions 16 and 17 are shown filled in in FIG. 7 and detailed illustration thereof is omitted, the adhesive regions 16 and 17 are formed by striped adhesive portions extending in the width direction.

Here, the non-adhesive area 15 is provided to include an area corresponding to the urethral opening of the wearer (hereinafter referred to as "urethral opening corresponding area"). The urethral opening corresponding region is an area where the wearer's urethral opening is located when the diaper 1 is worn. Further, as shown in FIG. 7, a rubber thread 4F3 crosses the non-adhesive area 15. The diaper 1 lifts the cover sheet 4 and the inner cover sheet 5 toward the skin side by the contraction force of the rubber thread 4F3. Generally, the absorbent material in the crotch region absorbs urine, becomes heavy, and tends to move away from the wearer's skin, and as the absorbent material moves away from the skin, there is a risk that the three-dimensional gathers may also move away from the skin. On the other hand, in the diaper 1 according to the present embodiment, by lifting the absorbent body 8 in the crotch region 1B toward the skin surface using the thread rubber 4F3, it is possible to suppress the separation of the absorbent body 8 and the three-dimensional gathers from the skin surface.

<Adhesion form 2>
Next, adhesive form 2 will be explained using FIG. 8. FIG. 8 is a plan view of the diaper 1 viewed from the skin side. As shown in FIG. 8, adhesive regions 18L and 18R are provided adjacent to the non-adhesive region 15 in the width direction. In FIG. 8, the adhesive areas 18L and 18R are shown filled in. The adhesive areas 18L and 18R are areas where the absorbent body 8 and the exterior body are adhered, and are approximately parallel to the bending lines 10L2 and 10R2, which are the upright lines of the side sheets 10L and 10R shown in FIG. 5, when viewed from above. Extending. Note that "substantially parallel" includes completely parallel and slightly deviated from parallel. In adhesion form 2, the adhesion regions 18L and 18R have high rigidity, and the absorber 8 can be easily bent along the adhesion regions 18L and 18R so that the cross section in the width direction has a W-shape.

<Adhesion form 3>
Next, adhesive form 1 will be explained using FIG. 9. FIG. 7 is a plan view of the diaper 1 viewed from the skin side. As shown in FIG. 7, in the crotch region 1B, a non-adhesive region 15 is provided where the absorbent core 8 and the inner cover sheet 5 are non-adhesive. The non-adhesive area 15 is continuously provided from one end to the other end of the diaper 1 in the width direction. An adhesive area 19 where the absorbent body 8 and the inner cover sheet 5 are adhered is provided on the back body area 1R side of the non-adhesive area 15. The adhesive area 19 is provided at the center in the width direction, and both ends in the width direction extend substantially parallel to the bending lines 10L2 and 10R2, which are the upright lines of the side sheets 10L and 10R, when viewed from above. There is. In adhesive form 3, the adhesive region 19 has high rigidity, and the absorbent body 8 can be easily bent along each end of the adhesive region 19 in the width direction so that the cross section in the width direction has a W-shape. Note that the adhesive region 19 may be provided on the front body region 1F side of the non-adhesive region 15.

In addition, in all of the adhesive forms 1 to 3, the non-adhesive regions are provided at least at both ends in the width direction. This allows the widthwise end side of the absorbent core 8 to be bent toward the skin surface. In the diaper 1 according to the present embodiment, the widthwise end side of the absorbent body 8 is bent toward the skin side, so that the absorbent body 8 can be easily lifted toward the skin side by the thread rubber 4F3. Each of the bonding regions of bonding types 1 to 3 is a region where the inner cover sheet 5 and the back sheet 6 are bonded with a hot melt adhesive. In each adhesive area, the absorbent body 8 is adhered to the inner cover sheet 5 via the back sheet 6.

Next, the lines 14 formed on the absorber 8 will be explained using FIG. 10. FIG. 10 is a plan view showing the absorbent body 8, part of the rubber threads 4F3 and 4R3, and the rubber thread 4F7 extracted from the diaper 1. In addition, in FIG. 10, although the above-mentioned adhesion form 1 is illustrated, any of the adhesion forms 1 to 3 may be used.

As shown in FIG. 10, the line 14 has five grooves. The five grooves include grooves 14AL, 14AR, grooves 14BL, 14BR (an example of a "groove" in the present disclosure), and groove 14C. The grooves 14AL and 14AR are formed in the absorbent body 8 and extend from the center in the width direction of the diaper 1 toward the outside from the crotch region 1B to the side end of the front body region 1F in a region corresponding to the wearer's groin region. There are a pair of left and right grooves. The grooves 14AL and 14AR are compressed grooves formed by compressing the absorbent core 8. Note that the grooves 14AL and 14AR may be formed by squeezing only the absorbent core 8c, or may be formed by squeezing the absorbent core 8 including the core wrap sheet 7. In this embodiment, the grooves 14AL and 14AR are formed by squeezing the core wrap sheet 7 and the absorbent core 8c from the skin side. The absorbent body 8 is bent along the wearer's groin region due to the grooves 14AL and 14AR formed therein.

In addition, when the area where the grooves 14AL and 14AR are provided is viewed in plan, a non-adhesion area 15 is formed that includes an area where the grooves 14AL and 14AR overlap, and where the absorbent body 8 and the inner cover sheet 5 are not adhered to each other. has been done. In addition, in FIG. 4, the non-adhesive area 15 is shown filled in. If the non-adhesive region 15 is not formed including the region where the grooves 14AL and 14AR overlap, and the absorbent body 8 and the inner cover sheet 5 are adhered in this region, the exterior body will be spread out and the skin side As a result, the state of the exterior body is transmitted to the absorbent body 8, and a force is applied to the absorbent body from a bent state to a flat state along the inguinal region. In contrast, the diaper 1 according to the present embodiment is configured as described above, so that the absorbent body 8 that is bent along the inguinal region can be pressed against the skin side while maintaining the bent state. It becomes possible. Thereby, the diaper 1 can improve the adhesion of the absorbent core 8 to the wearer's skin.

Further, when the diaper 1 is viewed from above as shown in FIG. 10, the diaper 1 includes a rubber thread 4F3 that is bonded to the inner cover sheet 5 and the cover sheet 4 in a stretched state in a region overlapping the non-adhesive region 15. In addition, as shown in FIG. 3, the ends of the rubber thread 4F3 are arranged at the ends in the width direction of the left lower limb opening 2L and the right lower limb opening 2R. By inserting the legs into the left and right lower limb openings 2L and 2R provided in the exterior body, the exterior body is pulled outward in the width direction, and the rubber thread 4F3 is also pulled outward in the width direction. As a result, the outer body is pushed up toward the skin surface in the area where the thread rubber 4F3 crosses the crotch area 1B extending in the width direction, but there is a non-adhesive area where the absorbent body 8 and the outer body are not bonded. A bonding area 15 is provided. Therefore, the absorbent core 8 is pushed up toward the skin side by the exterior body while maintaining a bent state along the inguinal region. In addition, in this embodiment, the thread rubber 4F3 for forming leg gathers extends in the non-adhesive area 15 and is connected on the left and right sides, but the thread rubber provided in the non-adhesive area 15 and crossing the crotch area 1B and the leg gathers forming A rubber thread for use may be provided separately. Further, the ends of the rubber thread 4F3 are glued to the exterior body, and in the non-adhesive area 15, which is the central part in the width direction, the rubber thread is glued to another sheet material placed between the exterior body and the back sheet. You can. Even with this configuration, the diaper 1 can obtain the above-mentioned effects as long as the back sheet and another sheet material are not bonded together in the non-bonded area 15.

Next, the grooves 14BL and 14BR will be explained. The grooves 14BL and 14BR are a pair of left and right grooves that are formed in the absorbent body 8 and extend along the longitudinal direction in a region corresponding to the urethral opening of the wearer. Grooves 14BL and 14BR are compressed grooves formed by compressing the absorbent core 8. Note that the grooves 14BL and 14BR may be formed by squeezing only the absorbent core 8c, or may be formed by squeezing the absorbent core 8 including the core wrap sheet 7. In this embodiment, the grooves 14BL and 14BR are formed by compressing the core wrap sheet 7 and the absorbent core 8c from the skin side. The grooves 14BL and 14BR are formed in the absorbent body 8, so that the absorbent body 8 between the grooves is raised toward the urethral meatus side. Thereby, in the diaper 1, the absorbent body 8 can be pressed against the urethral opening, so that the adhesion of the absorbent body 8 to the wearer's skin can be improved.

Further, the rubber thread 4F3 is arranged to include a region overlapping the grooves 14BL and 14BR on the front body region 1F side when viewed from above. With this configuration, the effect of pressing the absorber 8 against the wearer's skin side in a folded state by the thread rubber 4F3 is enhanced. By providing a non-adhesive area 15 in the area where the thread rubber 4F3 and the absorbent body 8 overlap, the absorbent body 8 is not deformed by the contraction of the thread rubber 4F3, but the shape is bent by the grooves 14BL and 14BR. This is because the absorbent body 8 can be pressed against the skin side. In order to achieve this effect, it is preferable that the rubber thread 4F3 be pulled in the left-right direction when the legs are inserted through the left and right lower limb openings 2L, 2R, thereby pressing the absorbent body 8 against the skin. Therefore, it is preferable that the rubber thread 4F3 is a rubber thread for forming leg gathers, the ends of which are arranged at the ends of the diaper 1 in the width direction. In addition, when viewed in the thickness direction, when the rubber thread 4F3 for forming leg gathers overlaps the grooves 14AL and 14AR, the contractile force of the rubber thread 4F3 pushes the absorbent body 8 bent along the groin area to the skin surface of the wearer. Suitable for pressing against the side. Moreover, when the thread rubber 4F3 for forming leg gathers overlaps the grooves 14BL and 14BR when viewed in the thickness direction, the absorbent body 8 is pressed against the urethral meatus, or the inner pad (urinary It is suitable for pressing a pad) against the urethral meatus. In addition, in the diaper 1, the thread rubber 4F3 overlaps the grooves 14AL and 14AR, but the thread rubber 4F3 does not overlap the grooves 14BL and 14BR. It may be configured such that it is suitable for being pressed against the wearer's skin side by a contraction force of 4F3. In addition, in the diaper 1, the rubber thread 4F3 does not overlap the grooves 14AL and 14AR, but the rubber thread 4F3 overlaps the grooves 14BL and BR, so that the rubber thread 4F3 for forming leg gathers overlaps the grooves 14BL and 14BR. The structure may be suitable for pressing the absorbent body 8 against the urethral opening, or for pressing an inner pad (urine pad) placed on the top sheet 9 against the urethral opening. Further, as in the present embodiment, the rubber thread 4F3 overlaps the grooves 14AL, 14AR and the grooves 14BL, 14BR in the diaper 1, and it is of course possible to adopt both of the above two preferred configurations.

Note that the grooves 14AL, 14AR and the grooves 14BL, 14BR are not limited to compressed grooves. The grooves 14AL, 14AR and the grooves 14BL, 14BR only need to be able to bend the absorbent body 8 using the grooves as starting points, and can be formed by thinning grooves or through grooves formed by reducing the basis weight of the pulp of the absorbent core 8c only in the groove forming part. There may be. Note that by forming the grooves 14AL, 14AR and the grooves 14BL, 14BR as compressed grooves, the groove forming portion can be made highly rigid and the groove forming portion can be prevented from losing its shape.

Further, in this embodiment, the groove 14AL and the groove 14BL are connected, and the groove 14AR and the groove 14BR are connected. Thereby, the groove 14AL, the groove 14BL, and the groove 14AR and the groove 14BR can be integrally formed. Note that the groove 14AL and the groove 14BL may be adjacent to each other with a gap between them, and the groove 14AR and the groove 14BR may be adjacent to each other with a gap between them. Further, when a gap is provided between these grooves, the end of the groove 14BL may not be arranged on the extension line of the groove 14AL, and the end of the groove 14BR may not be arranged on the extension line of the groove 14AR. You don't have to.

Further, the non-adhesive region 15 includes a region that overlaps with the front body region 1F side end portions of the grooves 14BL and 14BR when viewed in plan. By inserting the legs into the left and right lower limb openings 2L and 2R provided in the exterior body, the exterior body is pulled outward in the width direction, and the rubber thread 4F3 is also pulled outward in the width direction. As a result, the outer body is pushed up toward the skin surface in the area where the thread rubber 4F3 crosses the crotch area 1B extending in the width direction, but the non-adhesive area 15 where the absorbent body 8 and the outer body are not bonded is It is provided. Therefore, the absorbent core 8 is pushed up toward the urethral meatus side by the exterior body while maintaining a raised state toward the urethral meatus side between the grooves 14BL and 14BR. Thereby, in the diaper 1, the absorbent body 8 can be pressed against the urethral opening, so that the adhesion of the absorbent body 8 to the wearer's skin can be improved.

Further, when viewed from above, both ends of the grooves 14BL and 14BR in the width direction extend substantially parallel to the bending lines 10L2 and 10R2, which are the upright lines of the side sheets 10L and 10R shown in FIG. The diaper 1 can be easily folded along the grooves 14BL and 14BR so that the absorber 8 has a W-shaped cross section in the width direction.

Next, the groove 14C will be explained. The groove 14C is formed in the absorbent body 8, is arranged on the rear body region 1R side of the grooves 14BL and 14BR, and extends in the width direction. The groove 14C is a compressed groove formed by compressing the absorbent core 8. Note that the grooves 14C may be formed by squeezing only the absorbent core 8c, or may be formed by squeezing the absorbent body 8 including the core wrap sheet 7. In this embodiment, the grooves 14C are formed by squeezing the core wrap sheet 7 and the absorbent core 8c from the skin side.

Since the groove 14C is a compressed groove, it becomes a highly rigid part compared to the area outside the groove formation area. In addition, the diaper 1 has the grooves 14BL and 14BR, so that when worn, the absorbent body 8 is narrowed in the left and right direction by the wearer's legs, and becomes convex toward the skin starting from the grooves 14BL and 14BR. The absorbent body 8 is bent to improve its adhesion to the urethral opening. However, if the parts of the absorbent body 8 that protrude toward the skin starting from the grooves 14BL and 14BR extend to the anus of the wearer, the absorbent body 8 will convex toward the anus, causing the gluteal cleft in the buttocks ( There is a possibility that the absorbent body 8 may get into the cracks), giving the wearer a sense of discomfort. Furthermore, if the absorbent body 8 gets into the intergluteal cleft of the buttocks, there is a risk that feces excreted from the anus will be pushed up toward the skin surface by the absorbent body 8, and the feces will be pressed against the skin. Therefore, it is not preferable that the absorbent body 8 protrudes toward the anus and enters the intergluteal cleft of the buttocks.

In order to suppress the occurrence of this problem, grooves 14C are formed in the diaper 1 according to the present embodiment. By providing the groove 14C, the diaper 1 can prevent the absorbent body 8 from protruding toward the skin in the region of the diaper 1 corresponding to the anus (anus corresponding region 30). The diaper 1 forms a space between the anus or intergluteal cleft and the absorbent body 8 by providing the groove 14C, which is a highly rigid part extending in the left-right direction in the region corresponding to the anus, and prevents the above-mentioned problem from occurring. suppress. In FIG. 4, the region corresponding to the anus is the region where the wearer's anus is located when the diaper 1 is worn.

The grooves 14BL and 14BR allow the absorbent body 8 to be bent into a W-shape when cut in the width direction, thereby making it possible to press the skin side of the absorbent body 8 against the urethral opening. Even if the grooves 14BL and 14BR are provided only in the area corresponding to the urethral opening, if the absorbent body 8 becomes flat in areas other than the groove formation area, the grooves will not function as a bending mechanism for the absorbent body 8. For this reason, it is necessary to extend the groove longer than the area corresponding to the urethral opening. Therefore, in the present embodiment, the pair of left and right grooves 14BL, 14BR extending along the longitudinal direction of the diaper 1 extends from the urethral orifice corresponding region on the ventral side to the anus corresponding region 30 on the dorsal side. There is. The anus corresponding area 30 is an area where the wearer's anus is located when the diaper 1 is worn. The diaper 1 according to the present embodiment extends the grooves 14BL and 14BR to the anus corresponding region 30, thereby bending the absorbent body 8 into a W-shape and increasing the adhesion of the absorbent body 8 to the urethral opening of the wearer. be able to. However, if the grooves 14BL and 14BR are formed up to the anus corresponding region 30 and the absorbent core 8 is bent along the grooves 14BL and 14BR, there is a risk that the absorbent core 8 will dig into the intergluteal cleft (cleft) of the wearer's buttocks. If the absorbent body were to dig into the wearer's intergluteal cleft, the wearer would feel a sense of pressure, and the feces excreted by the wearer would come into contact with the skin around the intergluteal cleft, reducing the wearer's comfort. Therefore, the diaper 1 according to this embodiment includes the groove 14C. As a result, the diaper 1 prevents the absorbent body 8 in the anus corresponding area 30 from bending along the grooves 14BL and 14BR, and prevents the absorbent body 8 from digging into the wearer's intergluteal cleft, thereby reducing the feeling of wearing. can be suppressed.

Moreover, in this embodiment, since the grooves 14BL and 14BR are also compressed grooves, the grooves 14BL and 14BR and the groove 14C can be formed in the same process. Furthermore, the groove 14C may be connected to the grooves 14BL and 14BR. Thereby, the grooves 14BL, 14BR and the groove 14C can be integrally formed. Moreover, even if the groove 14C is connected to the grooves 14BL and 14BR, the absorbent body 8 becomes convex toward the skin side between the grooves 14BL and 14BR, but the absorbent body 8 convexes in the region where the groove 14C is formed on the back side. This prevents the occurrence of Moreover, the grooves 14BL and 14BR are arranged closer to the front body region 1F than the region corresponding to the wearer's anus (anus corresponding region 30). Thereby, the diaper 1 can suppress the absorbent body 8 from becoming convex in the region corresponding to the anus (anus corresponding region 30).

The diaper 1 also includes a rubber thread 4F7 bonded to the non-skin surface side of the absorbent body 8 in a stretched state in the longitudinal direction. The rubber thread 4F7 is arranged in an area overlapping between the pair of grooves 14BL and 14BR, and expands and contracts in the longitudinal direction. The rubber thread 4F7 contracts the inner cover sheet 5 and the cover sheet 4, which are the exterior bodies, and pushes the absorbent core 8 toward the skin surface. Thereby, in the diaper 1, the portion of the absorbent body 8 that is convex toward the urethral meatus between the pair of grooves 14BL and 14BR can be lifted toward the skin side by the exterior body. Since the diaper 1 allows the absorbent body 8 to be pressed against the urethral opening, the adhesion of the absorbent body 8 to the wearer's skin can be improved.

Moreover, the thread rubber 4F7 extends including between the pair of left and right grooves 14AL and 14AR when the diaper 1 is viewed from above. In the area where the absorbent core 8 bends starting from the grooves 14AL and 14AR and lies along the groin area, the exterior body contracts in the longitudinal direction and floats toward the non-skin side, causing the outer body to curve around the groin. It becomes easier to deform along the line. Thereby, the diaper 1 can improve the feeling of wearing.

As described above, the rubber thread 4F7 extends between the grooves 14AL, 14AR and the grooves 14BL, 14BR. As shown in FIG. 3, when the diaper 1 is viewed from above, the rubber thread 4F7 does not overlap the rubber thread 4F2 for tummy gathers. With this configuration, the diaper 1 forms a space with the wearer's skin on the crotch region 1B side of the tummy gathers, and urine that reaches the front body region 1F side (ventral side) in the left and right direction is It becomes easier to go around to the other side. For example, if the wearer is a man and the wearer urinates with the tip of his male genitals facing either the left or right direction, the urine will tend to go around to the other direction. Leakage can be suppressed.

Further, the rubber thread 4F7 is arranged closer to the front body region 1F than the region corresponding to the wearer's anus (anus corresponding region 30). In other words, the rubber thread 4F7 is arranged closer to the front body region 1F than the groove 14C. With this configuration, the diaper 1 uses the contractile force of the rubber thread 4F7 to lift the exterior body toward the skin surface, thereby moving the convex portion of the absorbent body 8 between the grooves 14BL and 14BR to the skin surface. However, in the region corresponding to the anus (anus corresponding region 30), the absorbent body 8 is prevented from being lifted toward the skin surface. The diaper 1 can easily separate the anus from the skin side of the diaper 1.

<Modification 1>
Next, a diaper according to modification example 1 of the present embodiment will be described. FIG. 11 shows a diaper 1 according to this modification, including a back sheet 6, an absorbent core 8c, a top sheet 9, a side sheet 10L, and
It is a top view which extracts and shows 10R. In this modification, the elastic region of the innermost rubber thread 10L1, 10R1 among the plurality of rubber threads 10L1, 10R1 is shorter than the elastic region of the rubber thread 10L1, 10R1 arranged outermost. The elastic range of the rubber thread can be adjusted by adjusting the length of the rubber thread and the adhesive area of the rubber thread. In the diaper 1 according to this modification, the inner side of the free end side piece contracts within a shorter range than the outer side, thereby making the outer area easier to stand up and preventing the free end of the three-dimensional gather from falling toward the top sheet 9 side. can be suppressed.

<Modification 2>
Next, a diaper according to modification 2 of the present embodiment will be described. FIG. 12 is a cross-sectional view of the three-dimensional gathers 3BL cut in the width direction at the longitudinal center of the diaper. As shown in FIG. 12, among the plurality of rubber threads 10L1, the elastic member 10L1 disposed at the innermost side in the width direction has the largest elongation rate than the elastic member disposed at the outer side in the width direction, and The rubber thread 10L1 arranged on the inner side in the direction is arranged along the folded part 3BL2 so as to be in contact with the folded part 3BL2. From the viewpoint of preventing leakage, it is desirable that the three-dimensional gathers 3BL, 3BR contact the skin from the folded portions 3BL2, 3BR2 on the inner side in the width direction. For this reason, the rubber thread 10L1 disposed on the innermost side in the width direction is disposed along the folded portion 3BL2 so as to be in contact with the folded portion 3BL2.

In addition, when the three-dimensional gathers 3BL and 3BR have a strong contraction force on the outside in the width direction and a strong contraction color on the inside in the width direction, the outside in the width direction tends to approach the skin side when the person stands up. The diaper 1 can be made to stand up from the inner side of the three-dimensional gathers 3BL, 3BR in the width direction by making the inner side of the three-dimensional gathers 3BL, 3BR easier to stand up than the outer side of the three-dimensional gathers in the width direction. It also becomes easier to stand up on the outside in the width direction. In the diaper 1, the three-dimensional gathers 3BL and 3BR are raised from the inside in the width direction and the outside in the width direction is brought into contact with the skin surface from the inside in the width direction, thereby suppressing leakage of exudates.

Note that, as mentioned above, the elongation rate refers to the draft rate. In the diaper according to this modification, the elongation rate of the rubber thread 10L1 disposed on the innermost side in the width direction is made larger than the elongation rate of the rubber thread 10L1 disposed on the outermost side in the width direction. It is possible to prevent the portion 3BL4 from falling toward the top sheet 9 side. Note that the same applies to the three-dimensional gathers 3BR.

In the above embodiment, the exterior body on the front body region side and the exterior body on the back body region side are integrally formed, but the exterior body on the front body region side and the exterior body on the back body region side are integrally formed. However, it may be provided separately.

The embodiments and modifications disclosed above can be combined.

1B: Crotch area 1F: Front body area 1R: Back body area 2L: Left lower leg opening 2R: Right lower leg opening 2T: Torso opening 3BL, 3BR: Three-dimensional gathers 3BL1, 3BR1: Base end side pieces 3BL2, 3BR2: Folded parts 3BL3, 3BR3: Free end side pieces 3BL4, 3BR4: Free end parts 3LF, 3LR: Leg gathers 3R: Waist gathers 4: Cover sheet 4F1, 4F2, 4F3, 4F7: Thread rubber 4F4, 4F5: Edge 4FF: Folded line 4R1 , 4R2, 4R3, 4R3: Thread rubber 4R4, 4R5: Edge 4RF: Folding line 5: Inner cover sheet 6: Back sheet 7: Core wrap sheet 8: Absorbent body 8c: Absorbent core 9: Top sheet 10L, 10R: Side sheet 10L1, 10R1: Rubber thread 10L2, 10R2: Folding lines 11F, 11R: End sheet 12: Tammy gathers 13: Rubber thread cover sheet 14: Lines 14AL, 14AR, 14BL, 14BR, 14C: Groove 15: Non-adhesive areas 16, 17 , 18L, 18R, 19 : Adhesive area 35 : Base end adhesive part 36 : Free end adhesive part 66 : Hole

Claims (9)

An absorbent article having a length along a longitudinal direction and a length along a width direction perpendicular to the longitudinal direction,
an absorbent body that is provided in a position that includes the crotch area and can absorb the wearer's exudate;
a top sheet having a water permeable area provided on the skin side of the absorbent body;
a pair of left and right dew-proof sheets extending in the longitudinal direction and arranged outside the center in the width direction;
an exterior body disposed on a non-skin side of the wearer relative to the absorbent body;
a non-adhesive region in the crotch region where the absorbent body and the exterior body are non-adhesive, the non-adhesive region provided at least at both ends in the width direction;
Equipped with
The leak-proof sheet is
a non-water permeable sheet placed on the skin side of the top sheet;
a proximal side piece joined to the top sheet;
a bending portion that is bent from the base end side piece toward the skin surface side and outward in the width direction;
a free end side piece extending outward in the width direction from the bent portion;
a base end fixing part that fixes each of the longitudinal ends of the base end side piece to the top sheet;
a free end fixing part that fixes each of the longitudinal ends of the free end side piece to the base end side piece;
a plurality of elastic members that are bonded to the free end side pieces in a stretched state and extend in the longitudinal direction, the plurality of elastic members being spaced apart from each other in the width direction;
has
The distance between the free end fixing parts on both sides in the longitudinal direction is longer on the outer side in the width direction than on the inner side in the width direction,
Among the plurality of elastic members, the expansion rate of the elastic member arranged on the outer side in the width direction is lower than the elongation rate of the elastic member arranged on the inner side in the width direction.
Absorbent articles. Among the plurality of elastic members, the elastic region of the elastic member disposed furthest in the width direction is shorter than the elastic region of the elastic member disposed furthest outside in the width direction.
The absorbent article according to claim 1. Among the plurality of elastic members, the expansion rate of the elastic member disposed closest to the inner side in the width direction is greater than the expansion rate of the elastic member arranged furthest to the outer side in the width direction, and The arranged elastic member is arranged so as to be in contact with the folded part along the folded part,
The absorbent article according to claim 1. The non-adhesive area is provided in an area of the crotch area corresponding to the urethral opening of the wearer,
The absorbent article according to any one of claims 1 to 3. A bonded portion between the absorbent body and the exterior body, which is disposed adjacent to the non-adhesive region in the width direction, and is substantially parallel to the upright line on the skin side of the dew-proof sheet when viewed from above. The absorbent article according to any one of claims 1 to 4, comprising an adhesive portion. The non-adhesive area is provided continuously from one end side to the other end side in the width direction,
provided adjacent to at least one of the non-adhesive region and the longitudinal direction,
comprising an adhesive part that adheres the absorbent body and the exterior body,
The adhesive part is provided at the center in the width direction, and both ends in the width direction extend substantially parallel to the upright line of the dew-proof sheet toward the skin surface side when viewed from above.
The absorbent article according to any one of claims 1 to 5. According to any one of claims 1 to 6, the absorbent body includes a groove formed to include the crotch area and provided approximately parallel to an upright line of the dew-proof sheet toward the skin surface side. Absorbent articles. The grooves are provided substantially parallel to each rising line of the pair of left and right dew-proof sheets toward the skin surface side,
The absorbent article according to claim 7. the groove is a compression groove;
The absorbent article according to claim 7 or 8.

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