JP2016096884A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly receive excrement from a wearer at an auxiliary absorption tool, and suppress lateral leakage from the auxiliary absorption tool.SOLUTION: A disposable diaper 1 comprises: a main body part 2 having an absorption core 22; and a pair of crotch elastic members 24 extending in a longitudinal direction of the main body part 2 in the vicinity of both side parts 221 of the absorption core 22 on a crotch part 202. In the crotch part 202, thickness of the absorption core 22 on a center line of the main body part 2 along the longitudinal direction is thinner than thickness on other positions of the absorption core 22. In a state that the auxiliary absorption tool 7 is mounted on an inner face of the main body part 2, both side parts of the auxiliary absorption tool 7 overlap the pair of crotch elastic members 24. By shrinkage of the pair of crotch elastic members 24, the absorption core 22 and auxiliary absorption tool 7 become a downward salient state on the crotch part 202, and both side parts of the auxiliary absorption tool 7 are pressed to a wearer side. Therefore, excrement of a wearer is received properly on the auxiliary absorption tool 7, and lateral leakage of excrement from the auxiliary absorption tool 7 is suppressed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an absorbent article.

  When using a disposable diaper, in order to reduce the frequency | count of replacement | exchange of disposable diaper itself, using an auxiliary absorber together is performed. For example, the disposable diaper of patent document 1 is provided with the 1st flap each provided in the both sides of the centerline of the width direction of an absorber, and the 2nd flap provided in the outward of the width direction of a 1st flap, respectively. The first flap is provided with a first elastic member extending in the front-rear direction, and the first flap tilts outward in the width direction. The second flap is provided with a second elastic member that extends in the front-rear direction. In the disposable diaper of patent document 1, the auxiliary | assistant absorbent tool mounted on a 1st flap is lifted toward a wearer's skin with the contraction force of a 1st elastic member. Further, the second flap prevents side leakage from the absorbent article.

JP 2014-124509 A

  By the way, in the absorbent article of patent document 1, since it is necessary to form two types of flaps, a structure becomes complicated. Therefore, there is a need for a novel technique that can appropriately receive excrement from the wearer with an auxiliary absorbent device and can suppress side leakage from the auxiliary absorbent device.

  The present invention has been made in view of the above problems, and aims to provide a novel technique for appropriately receiving excrement from a wearer with an auxiliary absorbent device and suppressing side leakage from the auxiliary absorbent device. Yes.

  Invention of Claim 1 is an absorbent article, Comprising: The absorption core, the top sheet which covers the inner surface of the said absorption core, the outer surface of the said absorption core, a front part, a crotch part, and a rear part are longitudinal directions A back sheet that forms a substantially sheet-shaped main body part together with the absorbent core and the top sheet, and a pair of crotch parts extending in the longitudinal direction in the vicinity of both side edges along the longitudinal direction of the absorbent core. A crotch elastic member, and in the crotch part, the thickness of the absorbent core on the center line of the main body along the longitudinal direction is thinner than the thickness at other positions of the absorbent core, and the inner surface of the main body In a state where the auxiliary absorber is placed on the upper side, both side portions of the auxiliary absorber overlap the pair of crotch elastic members.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said auxiliary | assistant absorber is a substantially sheet-like auxiliary | assistant absorber main-body part, and the both sides of the said auxiliary | assistant absorber main-body part. The auxiliary absorbent body includes a pair of auxiliary absorbent sidewalls extending in the longitudinal direction of the auxiliary absorbent body and having a central portion in the longitudinal direction rising from the auxiliary absorbent body. The auxiliary absorbent is disposed on the inner surface of the body. In the state where the implement is placed, the vicinity of the fixed ends of the side walls of the pair of auxiliary absorbers overlaps with the pair of crotch elastic members.

  Invention of Claim 3 is an absorbent article of Claim 2, Comprising: In the state in which the said auxiliary absorber was mounted on the said inner surface of the said main-body part, a pair of auxiliary absorber side wall part The outer side in the left-right direction is not covered with the other side wall at the crotch part.

  Invention of Claim 4 is an absorbent article in any one of Claim 1 thru | or 3, Comprising: The width | variety in the left-right direction of the absorption core provided in the said auxiliary | assistant absorber in the said crotch part is the said main body. It is larger than the width in the left-right direction of the absorbent core.

  Invention of Claim 5 is an absorbent article in any one of Claim 1 thru | or 4, Comprising: It is provided in the said front part of the said main-body part, The said front part of the said main-body part in the said auxiliary absorber A front holding portion that holds an end portion on the side, and a rear holding portion that is provided on the rear portion of the main body portion and holds an end portion on the rear portion side of the main body portion in the auxiliary absorbent.

  According to the present invention, the excrement from the wearer is appropriately handled by the auxiliary absorbent device by pushing up both sides of the auxiliary absorbent device toward the wearer while making the absorbent core and the auxiliary absorbent device convex downward in the crotch. The side leakage from the auxiliary absorbent can be suppressed.

It is a top view of a disposable diaper. It is sectional drawing of a disposable diaper. It is a perspective view of a disposable diaper. It is a top view of the disposable diaper in the state where the auxiliary absorber was attached. It is sectional drawing of an auxiliary | assistant absorber and a disposable diaper. It is sectional drawing of an auxiliary | assistant absorber and a disposable diaper.

  FIG. 1 is a plan view showing a disposable diaper 1 that is an absorbent article according to an embodiment of the present invention in an unfolded state. FIG. 2 is a cross-sectional view of the disposable diaper 1 cut along a plane perpendicular to the longitudinal direction (that is, the longitudinal direction in FIG. 1) at the position AA shown in FIG. The disposable diaper 1 is a tape-type disposable diaper in which a part that is in contact with the wearer's stomach side and a part that is in contact with the back side are fastened around the waist by connecting parts 4 that are fastening sheets on both the left and right sides. Receive excrement from the wearer. In FIG. 1, the disposable diaper 1 is drawn with the surface on the side in contact with the wearer at the time of wearing (that is, the wearer side) facing forward.

  The disposable diaper 1 has a substantially sheet-like main body 2 and an absorbent holding device for holding an auxiliary absorbent 7 (see FIG. 4 described later) placed on the inner surface (the wearer-side surface) of the main body 2. Part 3 is provided. In FIG. 1, the center line of the main-body part 2 along a longitudinal direction is shown with the dashed-dotted line which attaches code | symbol C1.

  The upper part 201 and the lower part 203 in FIG. 1 of the main body 2 are parts that contact the skin of the wearer's abdomen and dorsal side, respectively. In the following description, “front part 201” and “rear part” Part 203 ". Further, a portion 202 that is continuous from the front portion 201 and the rear portion 203 between the front portion 201 and the rear portion 203 and faces the crotch portion of the wearer is referred to as a “crotch portion 202”. In the disposable diaper 1, the main body 2 has a front part 201, a crotch part 202, and a rear part 203 in order in the longitudinal direction, and the width of the front part 201 and the rear part 203 is larger than the width of the crotch part 202. Since the main body part 2 is a main part of the disposable diaper 1, the front part 201, the crotch part 202, and the rear part 203 of the main body part 2 can be regarded as the front part, the crotch part, and the rear part of the disposable diaper 1, respectively. .

  The absorbent holding unit 3 includes an auxiliary sheet 31 that extends over substantially the entire inner surface of the main body 2 and a plurality of elastic members 32 that are joined to the auxiliary sheet 31. A large opening 311 is formed in the auxiliary sheet 31. As will be described later, the auxiliary sheet 31 is used to hold the auxiliary absorber 7. Hereinafter, the elastic member 32 is referred to as a “holding elastic member 32”. Details of the structure of the absorbent holding unit 3 will be described later.

  The disposable diaper 1 further includes a pair of connection parts 4 attached to both sides of the rear part 203. When the disposable diaper 1 is attached to the wearer, the pair of connection parts 4 is in a state where the front part 201 and the rear part 203 of the main body part 2 are in contact with the wearer's stomach side and back side, respectively, as shown in FIG. As shown in FIG. 2, the both sides of the rear part 203 are attached to the to-be-attached sheet 26 on the outer surface of the front part 201 (that is, the surface opposite to the surface in contact with the wearer). Connected to both sides.

  As shown in FIGS. 1 and 2, the main body 2 is disposed between a liquid-permeable top sheet 21, a water-repellent or liquid-impervious back sheet 23, and the top sheet 21 and the back sheet 23. Formed by the absorbent core 22. The top sheet 21 covers the inner surface of the absorbent core 22, and the back sheet 23 covers the outer surface of the absorbent core 22. In FIG. 2, for convenience of illustration, each component of the disposable diaper 1 is drawn away in the thickness direction. Moreover, in FIG. 1, the outline of the absorption core 22 is drawn with the thick broken line, in order to make an understanding of a figure easy.

  As shown in FIG. 1, the width of the outer shape of the absorbent core 22 in the front portion 201 and the rear portion 203 (that is, the length in the left-right direction perpendicular to the longitudinal direction of the main body portion 2) It is larger than the width of the outer shape. In other words, the outer shape of the absorbent core 22 is an hourglass shape. Two edges 221 that define the width of the outer shape of the absorbent core 22, that is, both side edges 221 of the absorbent core 22 extend along the longitudinal direction in the crotch 202 and are substantially parallel to the center line C 1 of the main body 2. . In the crotch portion 202, the distance from the center line C1 to each side edge 221 of the absorbent core 22 is preferably not more than 2/3 of the distance from the center line C1 to the side edge of the main body 2, and more preferably Is 1/2 or less (for example, 1/3 or more).

  The absorbent core 22 has a thin portion 222 whose thickness is thinner than the thickness at other positions of the absorbent core 22. The thin portion 222 is disposed on the center line C1 of the main body portion 2 and extends over substantially the entire crotch portion 202 in the longitudinal direction. In the preferred disposable diaper 1, the hydrophilic fiber and the water-absorbing material that form the absorbent core 22 are not disposed in the thin portion 222. For example, the width of the thin portion 222 in the left-right direction is 1/3 or less of the width of the outer shape of the absorbent core 22 in the crotch portion 202. The thin part 222 in the absorbent core 22 is not provided in the front part 201 and the rear part 203. That is, the thickness of the absorption core 22 in the front part 201 and the rear part 203 is substantially constant. The thin portion 222 may be provided over the entire absorption core 22 in the longitudinal direction.

  As shown in FIG. 2, the top sheet 21 is joined around the absorbent core 22 to the back sheet 23 via a hot melt adhesive (which may be another type of adhesive; the same applies hereinafter). Further, the outer side in the longitudinal direction and the outer side in the left-right direction of the auxiliary sheet 31 are hot melt bonded to the part exposed from the top sheet 21 of the back sheet 23 and the part near the edge of the top sheet 21. It joins via an agent.

  As shown in FIGS. 1 and 2, in the crotch portion 202 of the main body portion 2, a pair of crotch elastic members 24 extending in the longitudinal direction are disposed in the vicinity of both side edges 221 of the absorbent core 22. Each crotch elastic member 24 includes a plurality of crotch elastic elements 241 and 242 arranged in parallel to each other. The crotch elastic element 241 is sandwiched between the top sheet 21 and the back sheet 23 on the outer side of each side edge 221 in the left-right direction, and is joined to both in an expanded state by a hot melt adhesive. The crotch elastic element 242 is sandwiched between the back sheet 23 and the outer surface of the absorbent core 22 inside each side edge 221 in the left-right direction, and is joined to both in an expanded state by a hot melt adhesive. As these hot melt adhesives, those of polyolefin type, rubber type, vinyl acetate type and the like are used (the same applies hereinafter). In the crotch portion 202, neither elastic member is provided on both outer sides in the left-right direction of the pair of crotch elastic members 24. The joining of the top sheet 21 and the back sheet 23 and the joining of the auxiliary sheet 31 to the top sheet 21 and the back sheet 23 may be performed by heat fusion joining, ultrasonic joining, or the like.

  As shown in FIG. 1, elastic members 25 that are sandwiched between a top sheet 21 and a back sheet 23 and extend in the left-right direction are provided at both ends in the longitudinal direction of the main body 2. The elastic member 25 includes a plurality of elastic elements arranged in parallel to each other. In the disposable diaper 1, a waist gather is formed by the elastic member 25 joined to the top sheet 21 and the back sheet 23 being contracted in the stretched state, and the main body 2 is placed around the waist of the wearer when the disposable diaper 1 is worn. In close contact. Thereby, leakage of urine etc. from around the waist is prevented.

  The top sheet 21 is a liquid-permeable sheet material that quickly captures the moisture of excrement from the wearer and moves it to the absorbent core 22. The top sheet 21 is, for example, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.) whose surfaces are hydrophilically treated with a surfactant. Point bond nonwoven fabric, air-through nonwoven fabric, and spunbond nonwoven fabric are used. In addition, as the top sheet 21, a nonwoven fabric (for example, a spunlace nonwoven fabric) formed of hydrophilic fibers such as cellulose, rayon, or cotton may be used.

  The absorbent core 22 is made by mixing a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber with a superabsorbent polymer (SAP (Super Absorbent Polymer)) or a superabsorbent material such as a superabsorbent fiber. It is formed by wrapping with a liquid-permeable nonwoven fabric or the like, and absorbs moisture that has passed through the top sheet 21 and quickly fixes it. Tissue paper, liquid-permeable nonwoven fabric, etc. that wraps hydrophilic fibers are joined to the hydrophilic fibers and water-absorbing material with a hot-melt adhesive, and the shape of the hydrophilic fibers is lost. Prevent later dropout). The absorbent core 22 in the present embodiment includes pulp fibers and SAP, or only SAP (so-called SAP sheet) and is thin.

  As the back sheet 23, a water-repellent or liquid-impervious nonwoven fabric (for example, a spunbond nonwoven fabric, a meltblown nonwoven fabric, an SMS (spunbond / meltblown / spunbond) nonwoven fabric) formed of hydrophobic fibers, A liquid-impermeable plastic film or a laminated sheet obtained by laminating these non-woven fabrics and a plastic film is used, and the water content of excreta reaching the back sheet 23 may ooze out of the main body 2. Is prevented. When a plastic film is used for the back sheet 23, a plastic film having moisture permeability (breathability) may be used from the viewpoint of preventing the disposable diaper 1 from being steamed and improving the wearer's comfort. preferable.

  As the auxiliary sheet 31, for example, a water-repellent or liquid-impervious nonwoven fabric (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, or the like) formed of hydrophobic fibers is used. As the elastic elements of the elastic members 24, 25, 32, for example, polyurethane yarn, belt-like polyurethane film, yarn-like or belt-like natural rubber, etc. are used. In this embodiment, polyurethane yarn is used as each elastic element. . Of course, the elastic members 24, 25, 32 may include only one elastic element.

  FIG. 4 is a plan view showing the disposable diaper 1 in a state in which the auxiliary absorbent 7 that receives excrement from the wearer is mounted on the inner surface of the main body 2, and FIG. It is sectional drawing which cut | disconnected the diaper 1 by the surface perpendicular | vertical to a longitudinal direction in the position of BB shown in FIG. 4 and 5 show a state where the auxiliary absorbent 7 and the disposable diaper 1 are expanded (that is, a state where the auxiliary absorbent 7 and the disposable diaper 1 are extended in the longitudinal direction and the left-right direction).

  As described above, the absorbent holding unit 3 shown in FIG. 4 includes the auxiliary sheet 31 and the plurality of holding elastic members 32. The opening 311 of the auxiliary sheet 31 is formed from the front part 201 to the rear part 203 of the main body part 2 in the longitudinal direction. The edge of the opening 311 in the front part 201 includes a pair of inclined edges 312 having a symmetrical shape with respect to the center line C <b> 1 of the main body part 2. The pair of inclined edges 312 move away from the center line C <b> 1 of the main body 2 on both sides in the left-right direction as it goes from the end on the front portion 201 side of the main body 2 toward the crotch 202. In other words, the width of the opening 311 in the left-right direction gradually increases from the end toward the crotch 202. The edge of the opening 311 in the rear portion 203 also includes a pair of inclined edges 312 that are symmetrical with respect to the center line C <b> 1 of the main body portion 2. The pair of inclined edges 312 move away from the center line C <b> 1 of the main body 2 on both sides in the left-right direction as it goes from the end on the rear portion 203 side of the main body 2 toward the crotch 202. That is, the width of the opening 311 in the left-right direction gradually increases from the end toward the crotch 202. The width of the opening 311 in the crotch part 202 is constant.

  The supporting elastic member 32 is joined to the auxiliary sheet 31 by a hot melt adhesive in an extended state along each inclined edge 312. That is, the pair of holding elastic members 32 are joined along the pair of inclined edges 312 at the front portion 201 side portion of the auxiliary seat 31, and the pair of holding elastic members 32 at the rear portion 203 side portion of the auxiliary seat 31. Are joined to the auxiliary sheet 31 along the pair of inclined edges 312. Each holding elastic member 32 is a set of a plurality of elastic elements arranged in parallel to each other.

  In each of the part on the front part 201 side and the part on the rear part 203 side of the auxiliary seat 31, the pair of inclined edges 312 are connected to each other via a connection edge 313 that intersects the center line C1. The connection edge 313 has an arc shape extending in the horizontal direction. The connection edge 313 may be a straight line extending in the left-right direction. In the auxiliary sheet 31, no elastic member is provided at a portion along the connection edge 313. That is, the portion along the connection edge 313 in the auxiliary sheet 31 does not have a stretchability in the left-right direction, and no gathers are formed in the vicinity of the connection edge 313. Depending on the design of the disposable diaper 1, an elastic member may be provided along the connection edge 313.

  The auxiliary sheet 31 is joined to the inner surface (the inner surface of the top sheet 21 or the inner surface of the back sheet 23) around the opening 311. Specifically, the portions of the auxiliary sheet 31 along the edges of both end portions of the main body portion 2 in the longitudinal direction are joined to the main body portion 2 as end joint portions 318, and the edges (both along the longitudinal direction) of both side portions of the main body portion 2 are joined. A portion of the auxiliary sheet 31 along the edge) is joined to the main body 2 as a side joint 319. In FIG. 4, regions where the auxiliary sheet 31 is joined to the inner surface of the main body 2, that is, the end joints 318 and the side joints 319 are shown with parallel oblique lines.

  The connection edge 313 is separated from the end joint portion 318 in the longitudinal direction at each of the front portion 201 side portion and the rear portion 203 side portion of the auxiliary seat 31. That is, a non-joining region where the auxiliary sheet 31 is not joined to the main body 2 is set between the connection edge 313 and the end joint 318. In the non-joining region, a central pocket 51 is formed between the auxiliary sheet 31 and the inner surface of the main body 2. The length between the connection edge 313 and the end joint portion 318 in the longitudinal direction, that is, the depth of the central pocket 51 is, for example, 1 to 5 centimeters.

  In addition, a non-joining region where the auxiliary sheet 31 is not joined to the main body 2 is set between each inclined edge 312 and the end joint 318 and the side joint 319. In the non-joining region, a side pocket 52 is formed between the auxiliary sheet 31 and the inner surface of the main body 2. Thus, in each of the front part 201 and the rear part 203, the central pocket 51 is provided at the position of the center line C1, and a pair of side pockets 52 are formed in the central pocket 51 on both outer sides of the central pocket 51 in the left-right direction. It is provided continuously.

  In the disposable diaper 1, in a state where the main body 2 is extended in the longitudinal direction and the left-right direction, the inclination angle of the pair of inclined edges 312 with respect to the center line C1 is preferably 45 ° or less, and thereby deep in the longitudinal direction. Side pockets 52 are formed. In addition, the inclination angle of the pair of inclined edges 312 in the rear portion 203 with respect to the center line C <b> 1 is preferably smaller than the inclination angle in the front portion 201. Thereby, the depth of the side pocket 52 in the rear part 203 becomes larger than the depth of the side pocket 52 in the front part 201.

  In the crotch portion 202, approximately the entire portion of the auxiliary sheet 31 around the opening 311 is joined to the inner surface of the main body 2. Accordingly, the pair of side pockets 52 in the front part 201 and the pair of side pockets 52 in the rear part 203 are substantially discontinuous in the crotch part 202. Also, no elastic member is provided at the portion of the auxiliary sheet 31 that faces the crotch portion 202.

  As shown in FIGS. 4 and 5, the auxiliary absorbent 7 includes a substantially sheet-like auxiliary absorbent main body 72 and the longitudinal direction of the auxiliary absorbent main body 72 on both sides of the auxiliary absorbent main body 72. A pair of auxiliary absorbent side sheets 73 are provided over the entire length. In the auxiliary | assistant absorbent tool 7 shown in FIG. 4, a shape and magnitude | size differ slightly between the site | part arrange | positioned at the front part 201 side of the disposable diaper 1, and the site | part arrange | positioned at the back part 203 side. Specifically, the width in the left-right direction of the part arranged on the front part 201 side is smaller than the width in the left-right direction of the part arranged on the rear part 203 side.

  As shown in FIG. 5, the auxiliary absorbent body main body 72 includes a top sheet 721, a back sheet 723, and an absorbent core 722 disposed between the top sheet 721 and the back sheet 723. The top sheet 721 covers the inner surface of the absorbent core 722, and the back sheet 723 covers the outer surface of the absorbent core 722. The auxiliary absorbent side sheet 73 includes an auxiliary absorbent joint portion 733 joined to the auxiliary absorbent body main body 72 and an auxiliary absorbent side wall portion 734 extending in the longitudinal direction. An elastic member extending in the longitudinal direction is provided at the free end of the auxiliary absorbent side wall 734. When the elastic member joined in the stretched state contracts, at least the central portion in the longitudinal direction of the auxiliary absorber side wall 734 stands up from the auxiliary absorber body 72 with the vicinity of the auxiliary absorber joint 733 as a fixed end. To do. The materials of the top sheet 721, the back sheet 723, the absorbent core 722, and the auxiliary absorbent side sheet 73 in the auxiliary absorbent 7 are the same as those of the top sheet 21, the back sheet 23, the absorbent core 22, and the auxiliary sheet 31 in the disposable diaper 1, respectively. is there.

  When attaching the auxiliary absorbent 7 to the disposable diaper 1, first, the auxiliary absorbent 7 is placed on the inner surface of the main body 2. Subsequently, the corners on both sides in the left-right direction at the end on the front portion 201 side of the auxiliary absorbent 7 are respectively inserted into the pair of side pockets 52 in the front portion 201. Further, the corners on both sides in the left-right direction at the end on the rear part 203 side of the auxiliary absorbent 7 are respectively inserted into the pair of side pockets 52 in the rear part 203. In each of the front part 201 and the rear part 203, the auxiliary absorbent 7 is biased toward the main body part 2 by a pair of holding elastic members 32 provided along a pair of inclined edges 312 in the auxiliary seat 31. Thereby, the auxiliary absorber 7 is held on the main body 2.

  As described above, in the disposable diaper 1, the front holding portion 33 that holds the end portion on the front portion 201 side of the auxiliary absorbent 7 placed on the inner surface of the main body portion 2 is provided in the front portion 201. This part 331 (hereinafter referred to as “holding sheet 331”) and a pair of holding elastic members 32 are realized. In addition, the rear holding portion 34 that holds the end of the auxiliary absorbent 7 on the rear portion 203 side includes a portion 341 (hereinafter referred to as “holding sheet 341”) of the auxiliary sheet 31 provided in the rear portion 203, and a pair. The holding elastic member 32 is realized.

  As shown in FIG. 5, when the auxiliary absorbent 7 is placed on the inner surface of the main body 2, both sides of the auxiliary absorbent 7 are connected to the pair of crotch elastic members 24 of the main body 2 in FIG. 5. It overlaps in the up-down direction (direction perpendicular to the longitudinal direction and the left-right direction). Specifically, in the crotch part 202, the width in the left-right direction of the absorbent core 722 provided in the auxiliary absorber 7 is larger than the width in the left-right direction of the absorbent core 22 of the main body 2, and A crotch elastic element 241 disposed outside the side edge 221 of the absorbent core 22 is disposed below the side portion.

  Moreover, in the absorption core 22, the thin part 222 is provided on the center line C1 (refer FIG. 1), and the bending rigidity of the crotch part 202 in the cross section perpendicular | vertical to a longitudinal direction is low in the position of the center line C1. In the disposable diaper 1, due to the contraction of the pair of crotch elastic members 24 joined in the stretched state, as shown in FIG. 6, both side portions of the absorbent core 22 are upward (the wearer side in the wearing state of the disposable diaper 1). While being pushed up, the cross-sectional shape of the main body 2 becomes a convex shape protruding downward. Actually, in the vicinity of the side edge 221 of the thin absorbent core 22, a large number of ridges extending in the left-right direction are formed side by side in the longitudinal direction, and the absorbent core 22 is curved outward.

  Further, both side portions of the absorbent core 722 of the auxiliary absorbent device 7 are also pushed up to the wearer side, and the cross-sectional shape of the auxiliary absorbent body portion 72 perpendicular to the longitudinal direction protrudes downward (opposite to the wearer). It becomes a convex shape. Therefore, in the auxiliary absorbent 7, the depth in the vertical direction of the accommodation space surrounded by the inner surface of the auxiliary absorbent main body 72 and the pair of auxiliary absorbent sidewalls 734 is increased. Thereby, excrement such as urine from the wearer is easily held in the accommodation space, and while suppressing leakage of excrement to the outside of the auxiliary absorbent device 7 (particularly, lateral leakage from the left-right direction) The moisture of the excrement is appropriately absorbed by the absorption core 722 of the auxiliary absorbent 7.

  Actually, the vicinity of the fixed ends of the pair of auxiliary absorbent side wall portions 734 overlaps with the pair of crotch elastic members 24, respectively, and the fixed ends of the auxiliary absorbent side wall portions 734 are pushed up toward the wearer. Thereby, the side wall part 734 of an auxiliary | assistant absorber is closely_contact | adhered to a wearer's skin, As a result, it is prevented more reliably that excrement leaks outside the auxiliary | assistant absorber 7 and the disposable diaper 1. FIG.

  As described above, in the disposable diaper 1 shown in FIG. 4, each of the front holding part 33 and the rear holding part 34 includes the holding sheets 331 and 341 that are stacked on the inner surface of the main body part 2. In 341, portions along the edge of the main body 2 and the edges of both sides are joined to the inner surface of the main body 2. In addition, the holding sheets 331 and 341 are formed with a pair of inclined edges 312 that are separated from the center line C1 to both sides in the left-right direction from the end of the main body 2 toward the crotch 202. A pair of holding elastic members 32 are joined along. In the auxiliary absorbent 7 attached on the inner surface of the main body 2, the holding elastic member 32 has corners on each side of the end on the front part 201 side and the end on the rear part 203 side along the inclined edge 312. Thus, it is pressed toward the main body 2 to some extent. Thereby, the shift | offset | difference of the auxiliary absorber 7 in both a longitudinal direction and the left-right direction can be suppressed.

  Further, by inserting each corner portion of the auxiliary absorbent 7 into the side pocket 52, the attachment of the auxiliary absorbent 7 to the disposable diaper 1 is completed. The auxiliary absorbent 7 can be easily attached to the disposable diaper 1 as compared with the case where the entire end of the auxiliary absorbent 7 is inserted into a pocket in which the edge to be formed extends in the left-right direction). Further, the disposable diaper 1 that holds the auxiliary absorbent 7 against the main body 2 by the inclined edge 312 can hold the auxiliary absorbent 7 having various sizes and shapes. Since the front holding portion 33 and the rear holding portion 34 have a simple structure provided with holding sheets 331 and 341 and a plurality of holding elastic members 32, the front holding portion 33 and the rear holding portion 34 are disposable compared to the case where a holding pocket long in the left-right direction is formed. The number of parts of the diaper 1 does not increase excessively.

  Each of the holding sheets 331 and 341 of the front holding portion 33 and the rear holding portion 34 is provided with a connection edge 313 that connects a pair of inclined edges 312 on the end side of the main body 2 where the holding portions 33 and 34 are provided. Then, the connection edge 313 is spaced apart from the end joint 318 at the end in the longitudinal direction. As a result, in the holding sheets 331 and 341, leak-proof pockets (the central pocket 51 and the side pockets 52) covering a wide range in the left-right direction can be formed, and excrement from the end portion side of the main body portion 2 can be formed. Leakage can be suppressed.

  In a state where the main body 2 is extended in the longitudinal direction and the left-right direction, the inclination angle of the pair of inclined edges 312 with respect to the center line C1 is 45 ° or less, so Deep side pockets 52 can be formed. As a result, excrement flowing in the longitudinal direction along the auxiliary absorbent sidewall 734 of the auxiliary absorbent 7 can be appropriately held in the side pocket 52.

  In the disposable diaper 1, the thickness of the absorbent core 22 on the center line C <b> 1 in the crotch part 202 is thinner than the thickness at other positions of the absorbent core 22. Further, a pair of crotch elastic members 24 extending in the longitudinal direction are provided in the crotch part 202 in the vicinity of both side edges 221 of the absorbent core 22, and the auxiliary absorbent 7 is placed on the inner surface of the main body 2. Both side portions of the auxiliary absorbent 7 are overlapped with the pair of crotch elastic members 24. As a result, due to the contraction of the pair of crotch elastic members 24, both sides of the auxiliary absorbent device 7 are worn by the wearer while making the absorbent core 22 and the auxiliary absorbent device 7 convex downward (opposite to the wearer) in the crotch 202. Pushed up to the side. As a result, excretion from the wearer can be appropriately received by the auxiliary absorber 7 and side leakage from the auxiliary absorber 7 can be suppressed.

  Here, the disposable diaper of the comparative example where the absorption core of the main-body part 2 is thick (for example, as thick as the absorption core 722 of the auxiliary | assistant absorbent tool 7) is assumed. In the disposable diaper of the comparative example, since the absorption core has high rigidity, the auxiliary absorbent 7 is stably supported from below by the absorbent core when the auxiliary absorbent 7 is attached. On the other hand, in the disposable diaper of a comparative example, since two thick absorption cores are piled up, the inside becomes easy to get steamed. Further, in the disposable diaper 1 of FIG. 5 in which the thin absorbent core 22 (for example, the absorbent core 22 thinner than the absorbent core 722 of the auxiliary absorbent 7) is used, the disposable diaper of another comparative example in which the crotch elastic member 24 is omitted. Is assumed. In the disposable diaper of the other comparative example, even when the auxiliary absorbent member 7 is attached, the use of the thin absorbent core 22 makes it difficult for the inside to be stuffy. On the other hand, since the rigidity of the absorption core 22 is low, the holding of the auxiliary absorbent 7 becomes unstable inside the disposable diaper.

  On the other hand, in the disposable diaper 1 of FIG. 5, the thin absorbent core 22 is employed, and a pair of crotch elastic members 24 that overlap both side portions of the auxiliary absorbent 7 are provided in the main body 2. Thereby, the auxiliary | assistant absorber 7 can be stably supported from a downward direction by a pair of crotch elastic member 24, suppressing the stuffiness of the inside of the disposable diaper 1. FIG. In the disposable diaper 1, the auxiliary absorbent 7 is provided by a front holding part 33 and a rear holding part 34 that press the auxiliary absorbent 7 against the main body 2 side, and a pair of crotch elastic members 24 that press the auxiliary absorbent 7 against the wearer. Can be held firmly. Moreover, in the absorption core 22 provided with the thin part 222, internal steaming can be further suppressed.

  Further, in the auxiliary absorbent 7, a pair of auxiliary absorbents that extend in the longitudinal direction of the auxiliary absorbent body main body 72 on both sides of the auxiliary absorbent body main body 72 and whose central portion in the longitudinal direction stands from the auxiliary absorbent body main body 72. A tool side wall 734 is provided. Then, in the state where the auxiliary absorbent 7 is placed on the inner surface of the main body 2, the vicinity of the fixed ends of the pair of auxiliary absorbent sidewalls 734 overlaps with the pair of crotch elastic members 24. Thereby, in the disposable diaper 1, the fixed end of the auxiliary | assistant absorbent tool side wall part 734 can be pushed up to a wearer side, and the side leakage from the auxiliary | assistant absorbent tool 7 can further be suppressed.

  In the disposable diaper 1, in the state where the auxiliary absorbent 7 is placed on the inner surface of the main body 2, the laterally outer sides of the pair of auxiliary absorbent side walls 734 are covered with other side walls at the crotch 202. Absent. In other words, in the crotch part 202 of the main body 2, a portion on the outer side in the left-right direction with respect to the pair of crotch elastic members 24 does not have elasticity in the longitudinal direction. Thereby, it is prevented that a wearer's groin part and leg circumference are pressed unnecessarily, and the wearing feeling of disposable diaper 1 can be improved.

  The disposable diaper 1 can be variously modified.

  One or both of the front holding portion 33 and the rear holding portion 34 may be provided with a holding pocket that is long in the left-right direction (a pocket in which an edge forming the opening extends in the left-right direction).

  In the disposable diaper 1, the width of the side joint portion 319 is narrowed in the crotch part 202, and an elastic member is provided on the auxiliary sheet 31 along the edge extending in the longitudinal direction of the opening 311. It may be formed.

  In addition to the tape-type disposable diaper, the structure of the disposable diaper 1 described above is such that the both sides of the front part 201 are joined to the both sides of the rear part 203, respectively, so that the upper part of the front part 201 and the rear part 203 are attached to the upper ends. It may be used for a pants-type disposable diaper in which a part opening is formed and a pair of leg openings are formed on the left and right of the crotch 202, and various other absorbent articles.

  The configurations in the above-described embodiments and modifications may be combined as appropriate as long as they do not contradict each other.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Main body part 7 Auxiliary absorber 21 Top sheet 22 (Disposable diaper) Absorption core 23 Back sheet 24 Crotch elastic member 33 Front holding part 34 Back holding part 72 Auxiliary absorbent body part 201 Front part 202 Crotch part 203 Back Part 221 Side edge 222 Thin part 722 Absorption core 734 (Auxiliary absorber) Auxiliary absorber side wall C1 Center line

Claims (5)

An absorbent article,
An absorbent core;
A top sheet covering the inner surface of the absorbent core;
A back sheet that covers the outer surface of the absorbent core and forms a substantially sheet-shaped main body part together with the absorbent core and the top sheet, having a front part, a crotch part and a rear part in order in the longitudinal direction;
A pair of crotch elastic members extending in the longitudinal direction near both side edges along the longitudinal direction of the absorbent core in the crotch part;
With
In the crotch part, the thickness of the absorbent core on the center line of the main body portion along the longitudinal direction is thinner than the thickness at other positions of the absorbent core,
An absorbent article, wherein in a state where the auxiliary absorbent is placed on the inner surface of the main body, both side portions of the auxiliary absorbent overlap the pair of crotch elastic members. The absorbent article according to claim 1,
The auxiliary absorber is
A substantially sheet-shaped auxiliary absorbent body,
A pair of auxiliary absorber side wall portions extending in the longitudinal direction of the auxiliary absorber body portion on both side portions of the auxiliary absorber body portion, and a central portion of the longitudinal direction rising from the auxiliary absorber body portion;
With
In the state where the auxiliary absorbent is placed on the inner surface of the main body, the vicinity of the fixed ends of the pair of auxiliary absorbent sidewalls overlaps with the pair of crotch elastic members. . The absorbent article according to claim 2,
In the state where the auxiliary absorber is placed on the inner surface of the main body, the laterally outer sides of the pair of auxiliary absorber side walls are not covered with other side walls at the crotch part. Absorbent article. The absorbent article according to any one of claims 1 to 3,
In the crotch part, an absorbent article in which a width in the left-right direction of the absorbent core provided in the auxiliary absorbent is larger than a width in the left-right direction of the absorbent core of the main body. The absorbent article according to any one of claims 1 to 4,
A front holding portion that is provided at the front portion of the main body portion and holds an end portion of the main body portion on the front portion side in the auxiliary absorber;
A rear holding portion that is provided at the rear portion of the main body portion and holds an end portion of the main body portion on the rear portion side in the auxiliary absorbent;
An absorbent article, further comprising:

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