TW201828906A - Absorbent article - Google Patents

Abstract

This absorbent article, which has a lengthwise direction and a widthwise direction that intersects the lengthwise direction, includes: an absorbent body that is provided along the lengthwise direction and absorbs waste; an abdomen-side band member that is provided along the widthwise direction, and is fixed at the widthwise center thereof to one end of the absorbent body in the lengthwise direction while covering said end from the non-skin-side of the absorbent body; and a back-side band member that is provided along the widthwise direction as a separate member from the abdomen-side band member, and is fixed at the widthwise center thereof to the other end of the absorbent body in the lengthwise direction while covering said other end from the non-skin-side of the absorbent body.; Elastic members that are expandable along the widthwise direction are respectively provided to the abdomen-side band member and the back-side band member. The abdomen-side band member includes abdomen-side-band-member side edge sections on both widthwise side edges thereof, the back-side band member includes back-side-band-member side edge sections on both widthwise side edges thereof, and the absorbent article is formed in a cylindrical manner by joining the abdomen-side-band-member side edge sections and the back-side-band-member side edge sections. The absorbent body includes an absorbent core obtained by laminating liquid-absorbent materials, and a liquid-impermeable leakage prevention sheet that covers the absorbent core from the non-skin side of the absorbent core.; The absorbent core includes a narrow section between an abdomen-side end section and a back-side end section, with the width of the narrow section in the widthwise direction being narrower than that of the abdomen-side end section and the back-side end section. The positions of the back-side-band-member side edge sections and the narrow section at least partially overlap in the lengthwise direction.

Description

   Absorbent article   

The present invention relates to an absorbent article.

As an absorbent article for absorbing excrement, a three-piece disposable diaper is known. The three-piece disposable diaper is generally configured to have an absorbent body installed in the wearer's crotch to absorb fecal matter, an abdominal side belt member covering the abdominal side of the wearer, and A back side belt member covering the back side of the wearer. The invention of a three-piece disposable disposable diaper is disclosed in which the absorbent body is reduced in diameter in the lengthwise middle portion thereof, and the shape of the absorbent body is made into a slightly hourglass clock shape. , Patent Document 1).

    [Leading technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Laid-Open No. 2008-253285

In a disposable disposable diaper having an absorptive body having a slightly hourglass clock shape such as Patent Document 1, it becomes difficult to hinder the wearer's feet from moving forward and backward. In addition, by adjusting the diameter reducing portion, when the foot moves forward and backward, the force applied to the absorbent body can be reduced, and deterioration in fit can be suppressed.

However, since the absorptive body has a reduced-diameter portion, there may be a problem that a gap easily occurs between the reduced-diameter portion and the foot of the wearer. When such a gap occurs, there is a possibility that excrement may leak out of the gap. Especially when the wearer is a baby, most of them wear paper diapers in a sleeping position, and most of them bend their feet forward when they are in a sleeping position. Therefore, it is easy to create a gap on the buttocks side and cause leakage of feces Problems arise.

The present invention has been developed in view of the foregoing problems, and an object thereof is to provide a paper diaper for a three-piece paper diaper having an absorbent body having a reduced-diameter portion in the middle portion in the longitudinal direction, which can prevent the A gap is created between the user's feet and the absorbent body.

The main invention for achieving the foregoing object is that an absorbent article is an absorbent article having a longitudinal direction and a transverse direction crossing the longitudinal direction, and is characterized in that: the absorbent article is provided along the longitudinal direction and used to absorb excrement; Absorptive body; provided along the lateral direction, and fixing the central portion of the lateral direction to the abdominal side band of the one end while covering one end of the longitudinal direction of the absorbent body from the non-skin side of the absorbent body And a member different from the abdomen-side belt member, which is provided along the lateral direction while covering the other end of the longitudinal direction of the absorbent body from the non-skin side of the absorbent body while changing the lateral direction The central portion of the rear side belt member is fixed to the other end portion, and an elastic member that expands and contracts in the lateral direction is disposed on each of the abdominal side belt member and the back side belt member. Both sides of the direction have side edges of the abdominal side band member, and the back side band members are attached to the side edges of the lateral direction. The back side belt member has a side edge portion, and the absorbent article is formed into a tube shape by joining the abdominal side belt member side edge portion and the back side belt member side edge portion, and the absorbent body has a liquid-absorbent material. An absorptive core material formed by laminating, and a liquid-impermeable leak-proof sheet covering the absorptive core material from a non-skin side of the absorptive core material, the absorptive core material is at an end portion on the abdominal side And the back side end portion has a reduced diameter portion having a width in the lateral direction narrower than that of the abdomen side end portion and the back side end portion, and at least a portion of the back side belt member side edge portion is positioned in the longitudinal direction. This is the same as the aforementioned reduced diameter portion.

Other features of the present invention will be made clearer from the description in the present specification and the drawings.

According to the present invention, a three-piece paper diaper having an absorptive body having a reduced-diameter portion in a middle portion in the longitudinal direction can suppress the occurrence of a gap between the foot of the wearer and the absorptive body.

1‧‧‧diaper (absorbent article)

1HB‧‧‧ Waist opening

1HL‧‧‧foot opening

10‧‧‧ Absorptive body

10ea‧‧‧ end

10eb‧‧‧End

10es‧‧‧ tip

10p‧‧‧part

11‧‧‧ Absorbent core material

11a‧‧‧ abdominal side end

11b‧‧‧back side end

11c‧‧‧ Reduced diameter

13‧‧‧ surface sheet member

15‧‧‧Back sheet member

15a‧‧‧Leakproof sheet

15b‧‧‧ Exterior sheet

15bf‧‧‧ prominent

15bg‧‧‧Return

17‧‧‧foot circumference elastic member

18‧‧‧LSG elastic member

19‧‧‧foot circumference auxiliary elastic member

30a‧‧‧ Abdominal band

30ac‧‧‧Central

30ac2‧‧‧part

30ae‧‧‧Side edge of abdominal band

30ae2‧‧‧ tip

30b‧‧‧Back side strap member

30bc‧‧‧central

30bc2‧‧‧‧part

30be‧‧‧Back side belt member side edge

30be2‧‧‧End

31‧‧‧Non-woven

32‧‧‧ Non-woven

35‧‧‧ Elastic member

35a‧‧‧ Abdominal side with elastic member

35b‧‧‧Back side with elastic member

40‧‧‧Illustrated sheet

50‧‧‧ post-processing belt

AU‧‧‧upper area

AD‧‧‧Lower area

ADc‧‧‧Central Department

ADcc‧‧‧ Central Section

ADce‧‧‧End

ADe‧‧‧ part

LG‧‧‧ Feet Wrinkles

LSG‧‧‧Three-dimensional folds (leak-proof wall)

LSGb‧‧‧Base end

LSGf‧‧‧Free End Section

FIG. 1 is a schematic perspective view of a three-piece disposable diaper (paper diaper 1) according to this embodiment.

Fig. 2 is a schematic plan view of the same diaper 1 as viewed from the skin side in an unfolded state.

Fig. 3 is a schematic plan view of the same diaper 1 as viewed from the non-skin side.

4A is a cross-sectional view taken along the line A-A and a cross-sectional view taken along the line C-C in FIG. 2, and FIG. 4B is a cross-sectional view taken along the line B-B in FIG.

FIG. 5 is a diagram illustrating the positional relationship between the reduced-diameter portion of the absorbent core material 11 and the back side belt member 30b according to this embodiment.

FIG. 6 is a diagram illustrating the positional relationship between the reduced-diameter portion of the absorbent core material 11 and the back side belt member 30b in the comparative example.

FIG. 7 is a schematic plan view illustrating an example in which the elastic member 35 is present in the central portion ADcc.

At least the following matters can be made clearer from the description in this manual and the drawings.

An absorbent article is an absorbent article having a longitudinal direction and a transverse direction crossing the longitudinal direction, and is characterized by having an absorbent body provided along the longitudinal direction to absorb excrement; and along the transverse direction An abdomen-side belt member for fixing the central portion in the lateral direction to the one end portion while covering one end portion in the longitudinal direction of the absorptive body from a non-skin side of the absorptive body; and A member with a different member is provided along the lateral direction, and fixes the central portion in the lateral direction to the other end portion while covering the other end portion in the longitudinal direction of the absorbent body from the non-skin side of the absorbent body. The back side belt member is provided with elastic members that are stretchable in the lateral direction, and the abdominal side belt member and the back side belt member are provided with elastic side members on both sides of the lateral direction. A side edge portion, and the back side belt member has a back side belt member side edge portion on both lateral edges of the lateral direction, and is joined The abdomen-side belt member side edge portion and the back-side belt member side edge portion shape the absorbent article into a cylindrical shape, and the absorbent body includes an absorbent core material formed by laminating a liquid absorbent material, and The absorptive core material is a liquid-impermeable leak-proof sheet covered from the non-skin side of the absorptive core material, and the absorptive core material is between the abdomen side end portion and the back side end portion and has the lateral direction. The width-reduced diameter portion is narrower than the abdomen-side end portion and the back-side end portion, and at least a portion of the back-side belt member side edge portion has a position overlapping the diameter-reduced portion in the longitudinal direction.

According to such an absorbent article, the effect of suppressing the generation of a gap between the foot of the wearer and the absorbent body can be achieved.

In this absorbent article, it is desirable that the elastic member disposed at a position overlapping the reduced diameter portion in the longitudinal direction is from one end portion to the other end portion in the lateral direction of the abdominal-side belt member, or from The back side belt member has a portion that becomes discontinuous between one end portion of the lateral direction to the other end portion, or both.

According to such an absorbent article, since the contraction force generated by the band-shaped elastic body acting on the absorbent core material in the lateral direction is suppressed, it is possible to prevent the absorbent core material from generating wrinkles.

In this absorbent article, it is desirable that the elastic member disposed at a position overlapping the reduced diameter portion in the longitudinal direction includes at least between one end portion and the other end portion in the lateral direction of the abdominal-side belt member. Become a discontinuous part.

According to such an absorbent article, by preventing the contraction force in the horizontal direction from acting on the backside region of the absorbent core material, wrinkles are not caused in the absorbent core material at least in this region, and it is possible for infants to When wearing a diaper in a sleeping position, it will not cause back pain.

In this absorbent article, it is desirable that the side edge portion of the back side belt member has a region overlapping the absorptive core material in the longitudinal direction, and the length in the longitudinal direction of the overlapping region is the side of the back side belt member. One-half or more of the length in the longitudinal direction of the edge portion.

According to such an absorbent article, the elasticity of the elastic member on the abdomen side and the elastic member on the back side is liable to sufficiently act on the back side (hip side) of the absorbent core material. The absorptive core material is less likely to be shifted.

In this absorbent article, it is desirable that a stretched portion of the foot elastic member disposed along the longitudinal direction closer to the outer side than the absorbent core material intersects the elastic member disposed on the back side belt member. The length in the longitudinal direction of the region is one-half or more of the length in the longitudinal direction of the side edge portion of the back side belt member.

According to such an absorbent article, since the transverse direction tensile force of the elastic member provided in the belt portion greatly affects the effective length range of the foot circumference elastic member, the fit of the diaper can be further improved.

In this absorbent article, it is desirable to provide a belt member on the non-skin-side surface of the back side belt member to keep the absorbent article in a rounded state when the absorbent article is discarded, and the belt member and the absorbent article are provided. The core material is arranged at a position where at least a part of the core material overlaps in the longitudinal direction.

According to such an absorbent article, an absorbent core material having a thickness in the thickness direction between the skin (hip) of the wearer and the post-processing belt functions as a cushioning body, making it difficult to convey the feeling of the post-processing belt. On the skin (hips) of the wearer, the wearer can be prevented from feeling uncomfortable.

In this absorbent article, it is desirable that the length in the longitudinal direction of the back-side belt member is longer than the length in the longitudinal direction of the abdominal-side belt member.

According to such an absorbent article, the area of the back side belt member is wider than that of the abdominal side belt member, and the hips of the wearer can be covered more widely.

In this absorbent article, it is desirable that the upper end portion in the longitudinal direction of the back side belt member is parallel to the lower end portion in the longitudinal direction of the back side belt member.

According to such an absorbent article, as compared with the case where the foot circumference opening is inclined, the back side belt member is less likely to be lifted when the paper diaper is worn, and it is easy to suppress the exposed hips of the wearer.

In this absorbent article, it is desirable that the absorptive body has a sheet-like surface sheet covering the absorbent core material from the skin side, and the surface sheet member is formed to stand at each end in the lateral direction of the surface sheet member. The leakage-preventing wall portion of the portion is higher than the rising height of the leakage-preventing wall portion formed at the positions of the abdomen side end portion and the back side end portion of the absorptive core material. The rising height of the leak-proof wall portion formed at the position of the reduced diameter portion is high.

According to such an absorbent article, by forming the leak-proof wall portion (three-dimensional wrinkle LSG) in the reduced-diameter portion of the absorbent core material that is liable to generate a gap, it is possible to make the excrement difficult to leak.

    === Implementation Form ===         <Structure of disposable diapers after use>    

FIG. 1 is a schematic perspective view of a three-piece disposable paper diaper (paper diaper 1) as an example of an absorbent article according to this embodiment. Fig. 2 is a schematic plan view of the same diaper 1 as viewed from the skin side in an unfolded state. Fig. 3 is a schematic plan view of the same diaper 1 as viewed from the non-skin side. 4A is a sectional view taken along the line A-A and a sectional view taken along the line C-C in FIG. 2, and FIG. 4B is a sectional view taken along the line B-B in FIG. 2.

As shown in FIGS. 2, 4A, and 4B, the paper diaper 1 has a longitudinal direction, a lateral direction, and a thickness direction, which are three directions orthogonal to each other. Since the diaper 1 is a so-called three-piece type, it has three parts 10, 30a, and 30b. In other words, the paper diaper 1 has, as a first member, an absorbent body 10 for absorbing excrement such as urine disposed in the lower chin area of the wearer, and as a second member, covering the same wearer. And a third side member that covers the back side band member 30b of the back side portion of the same wearer. In the expanded state of FIG. 2, the absorptive body 10 is hung between the belt members in a state where the abdominal-side belt members 30 a and the back-side belt members 30 b are arranged parallel to each other in the longitudinal direction with an interval therebetween. The ends 10ea and 10eb in the longitudinal direction of the absorbent body 10 are respectively fixed to the closest belt members 30a and 30b, and the appearance shape is slightly H-shaped in a plane viewing angle. Further, from this state, the absorbent body 10 is folded in half with the slightly central portion C10 in its longitudinal direction as the folding position. In this folded state, when the abdominal-side belt member 30a and the back-side belt member 30b face each other so as to abut the abdominal-side belt-member-side edge portion 30ae and the back-side belt-member side of the portion of the wearer's side The edge portion 30be (that is, each end portion in the horizontal direction) is joined and connected, and the band members 30a and 30b are formed into a ring shape with each other. As a result, the paper diaper 1 shown in FIG. 1 is formed in a worn state with a waist opening 1HB and a pair of foot openings 1HL.

In addition, various connection structures can be adopted as a connection structure which connects the said belly side belt member side edge part 30ae and the back side belt member side edge part 30be. In addition, for example, a connection structure that cannot be removed by welding or the like can be used as a pant-type diaper, and a detachable connection structure such as a buckle member (not shown) can be used as an open-type diaper. Incidentally, in this example, the former connection structure is used, whereby the paper diaper 1 of this embodiment is a shorts type.

In the following description, the vertical direction, horizontal direction, and thickness direction of the paper diaper 1 are simply referred to as [vertical direction], [horizontal direction], and [thickness direction], respectively. In addition, regarding the thickness direction, the side in contact with the wearer is also called [skin side], and the opposite side is called [non-skin side].

Hereinafter, the three components 10, 30a, and 30b of the paper diaper 1 will be described with reference to FIGS. 1 to 4B.

As shown in FIGS. 2 and 4B, the absorbent body 10 includes: an absorbent core material 11; a sheet member 13 covering the surface of the absorbent core material 11 from the skin side of the same core material 11; The skin side covers the absorptive core material 11 and becomes a back sheet member 15 on the outer surface of the absorptive body 10.

The absorbent core material 11 has a structure in which a liquid absorbent material is laminated, and is capable of absorbing excrement such as urine. As the liquid-absorbing material, for example, liquid-absorbing fibers such as pulp fibers can be used. In addition, the absorbent core material 11 may contain, for example, a superabsorbent polymer as a liquid-absorbent particulate body, or may contain a liquid-absorbent material other than liquid-absorbent fibers and liquid-absorbent particulate matter. The absorbent core material 11 may be covered with a liquid-permeable sheet (not shown) such as tissue paper.

The absorptive core material 11 of this embodiment has the abdominal side end part 11a which is an end region in the longitudinal direction upper side in FIG. 2, and the back side end part 11 b which is an end region in the longitudinal direction lower side in FIG. 2. Further, between the abdominal side end portion 11a and the back side end portion 11b, there is a reduced diameter portion 11c having a width in the lateral direction narrower than that of the abdominal side end portion 11a and the back side end portion 11b. Thereby, the absorptive core material 11 is comprised so that it may become an hourglass clock shape from a plane viewing angle as shown in FIG. By providing the reduced-diameter portion 11c in the absorbent core material 11, interference between the foot of the wearer of the paper diaper 1 and the absorbent core material 11 can be reduced, and the wearer can easily move the foot when the paper diaper 1 is worn.

The surface sheet member 13 is a sheet-like member that covers the absorbent core material 11 from the skin side, and is, for example, a liquid-permeable nonwoven fabric having a larger plane size than the absorbent core material 11 (see FIG. 4B). The back sheet member 15 is a sheet-like member that covers the absorptive core material 11 from the non-skin side. The sheet having a larger planar size than the absorptive core material 11 includes, for example, polyethylene or polypropylene. A liquid-tight leak-proof sheet 15a and a non-woven outer sheet 15b are adhered to each other with a double-layer structure. Furthermore, in a state where the absorbent core material 11 is sandwiched between the back sheet member 15 and the front sheet member 13, the back sheet member 15 is leak-proofed at the portions of the absorptive core material 11 protruding from the four sides to the outside. The sheet 15 a and the surface sheet member 13 are adhered in a frame shape, thereby substantially forming the absorbent body 10.

In the paper diaper 1, as shown in FIGS. 1, 2, and 4B, a so-called three-dimensional wrinkle LSG and a foot circumference wrinkle LG are formed by the exterior sheet 15b. The three-dimensional wrinkle LSG is a leak-proof wall portion provided on each end portion of the surface sheet member 13 in the lateral direction, and the foot-wrinkle LG is a foot formed in each of the foot-openings 1HL and 1HL of the paper diaper 1. Wai extension. The exterior sheet 15b will be described in more detail. First, as shown in FIG. 4B, the lateral dimension of the exterior sheet 15b is made sufficiently larger than the leak-proof sheet 15a, that is, the exterior sheet 15b is greatly enlarged from both sides in the lateral direction of the leak-proof sheet 15a. protruding. In addition, this protruding portion 15bf is folded back toward the center of the horizontal direction at the position of the end portion 10es in the lateral direction of the absorbent body 10 as the folded-back position. In the vicinity of the folded-back position, a foot elastic member 17 such as a rubber thread The foot circumference auxiliary elastic member 19 is fixed in the longitudinal direction in a state of being extended in the longitudinal direction, thereby forming the aforementioned foot circumference gathers LG. In addition, the foot circumference auxiliary elastic member 19 is not necessarily required, and the foot circumference fold LG may be formed only by the foot circumference elastic member 17. Further, the folded-back portion 15bg further extends toward the central side in the lateral direction, and is joined to the end portion in the lateral direction of the surface sheet member 13 covering the end portion. In addition, the portion joined to this end portion functions as the base end portion LSGb of the three-dimensional wrinkle LSG, that is, a portion closer to the front end side in the lateral direction than the base end portion LSGb is a free end portion LSGf, and can be sliced from the surface. The member 13 stands. Further, at the front end portion of the free end portion LSGf, the LSG elastic member 18 such as a rubber wire is fixed in the longitudinal direction while being extended in the longitudinal direction. Therefore, the longitudinal contraction of the LSG elastic member 18 causes the absorptive body 10 to bend in the longitudinal direction, so that the surface sheet member 13 side becomes the inner peripheral side. In this bending, the contraction imparted from the LSG elastic member 18 is used. The force causes the free end portion LSGf to contract in the longitudinal direction and stand up from the surface sheet member 13, whereby the free end portion LSGf functions as a three-dimensional corrugation LSG.

Furthermore, in this embodiment, since the absorptive core material 11 has an hourglass clock shape having a reduced diameter portion, the rising height of the three-dimensional corrugated LSG varies depending on the width of the reduced diameter portion in the lateral direction. Specifically, as the width of the absorbent core material 11 in the lateral direction becomes wider, the portion 15bf protruding in the lateral direction becomes shorter, and the standing height of the three-dimensional wrinkle LSG becomes lower. Conversely, as the width of the absorbent core material 11 in the lateral direction becomes narrower, the portion 15bf protruding in the lateral direction becomes higher, and the rising height of the three-dimensional wrinkle LSG becomes higher. Therefore, compared with the abdomen-side end portion 11a or the back-side end portion 11b having a wider width in the lateral direction of the absorptive core material 11, the absorptive core material 11 has a narrower diameter-reducing portion 11c having a narrower width in the lateral direction. The standing height becomes higher. Thereby, the three-dimensional wrinkle LSG is formed to be high in the reduced-diameter portion where a gap is likely to be formed, so that it is difficult for the excrement to leak.

In addition, although not shown, depending on the situation, a thin paper or the like as a second sheet may be installed between the surface sheet member 13 and the absorbent core material 11 or between the back sheet member 15 and the absorbent core material 11. Liquid-permeable sheet.

As shown in FIG. 2, the abdominal-side band member 30 a and the back-side band member 30 b are each a sheet member having a substantially rectangular shape in a plane viewing angle using a soft sheet such as a non-woven fabric as a material. Here, as shown in FIG. 4A and FIG. 4B, the nonwoven fabrics 31 and 32 are joined to overlap and form two pieces to form an abdominal side belt member 30a and a back side belt member 30b. In addition, the abdominal-side belt member 30a and the back-side belt member 30b cover the longitudinal ends 10ea and 10eb of the absorbent body 10 from the non-skin side of the absorbent body 10 with the central portions 30ac and 30bc in the horizontal direction, respectively. The central portions 30ac and 30bc of the band members 30a and 30b are overlapped and joined to the respective end portions 10ea and 10eb. Furthermore, the two pieces of nonwoven fabric 31 and 32 may have different sizes.

In addition, in the paper diaper 1 of the present embodiment, the length in the longitudinal direction (length in the short-side direction) of the back-side belt member 30b is longer than the length in the longitudinal direction (length in the short-side direction) of the abdominal-side belt member 30a. The lateral length of the abdominal side belt member 30a is substantially equal to the lateral length of the back side belt member 30b. That is, the area of the back side belt member 30b is wider than that of the abdominal side belt member 30a, and it is possible to cover the hips of the wearer widely. In addition, the shape of the back side belt member 30b is slightly rectangular, and the upper end portion in the longitudinal direction is parallel to the lower end portion. Therefore, the opening edge of the waistline opening 1HB is also parallel to the opening edge of the foot circumference opening 1HL of the back side belt member 30b. As a result, compared with the case where the foot opening is formed obliquely, when the diaper 1 is worn, the back side belt member is less likely to turn up, and it is easy to suppress the exposed hips of the wearer.

The absorptive body 10 overlaps the central portion 30ac of the abdominal-side belt member 30a and the central portion 30bc of the back-side belt member 30b so that the absorptive body 10 does not overlap the longitudinal end 30ae2 of the abdominal-side belt member 30a and The longitudinal end portion 30be2 of the back side belt member 30b overlaps the absorbent body 10 on portions 30ac2 and 30bc2 closer to the center side than the end portions 30ae2 and 30be2 (see FIG. 2). In addition, the longitudinal end portions 30ae2 and 30be2 of the abdomen-side band member 30a and the back-side band member 30b are thereby made into a full-length range in the horizontal direction, and the absorptive body 10 does not overlap in a band-like portion 30ae2. 30be2. Furthermore, the portions 30ae2 and 30be2 which do not overlap are the portions constituting the waist opening 1HB (FIG. 1) of the diaper 1. Therefore, the elastic members 35 described below are in the portions 30ae2 and 30be2. The horizontal direction is provided continuously over a range of approximately the entire length.

As shown in FIG. 2, FIG. 4A and FIG. 4B, a plurality of elastic members 35 and 35 are inserted between the two nonwoven fabrics 31 and 32 of the belt members 30 a and 30 b along the horizontal direction. And, it is bonded and fixed to the nonwoven fabrics 31 and 32 in a state of being stretched in the horizontal direction, thereby providing lateral stretchability to the abdominal-side belt member 30a and the back-side belt member 30b, respectively. The plurality of elastic members 35, 35 ... are arranged at intervals in the longitudinal direction and are arranged in the longitudinal direction. In this specification, the elastic member 35 provided on the abdominal side belt member 30a is referred to as an abdominal side elastic member 35a, and the elastic member 35 provided on the back side belt member 30b is referred to as a back side elastic member 35b. The basic structure of the elastic member 35 is substantially the same except for detailed specifications such as thickness, number of pieces, and arrangement position in the vertical direction. Therefore, in the following, a description will be given of the abdomen-side elastic member 35a provided on the abdomen-side belt member 30a, and the description of the back-side elastic member 35b provided on the back-side belt member 30b will be omitted. It should be noted that all configurations of the back side belt member 30b are similarly omitted.

In the following, for convenience of explanation, as shown in FIG. 3, the abdominal-side belt member 30a and the back-side belt member 30b are respectively divided into two regions AU and AD in the longitudinal direction. The end side faces the center side, and the two areas AU and AD arranged in the longitudinal direction are called [upper area AU] and [lower area AD]. Furthermore, it can be known with reference to FIG. 3 that the areas AU and AD are both strip-shaped areas along the horizontal direction.

The upper region AU is a portion constituting the waist opening 1HB of the diaper 1, and the upper region AU is a region that does not overlap with the absorbent body 10 (absorbent core 11) at all in the horizontal direction. In the upper region AU, the abdominal-side elastic member 35a (back-side elastic member 35b) is continuously arranged from one end portion in the lateral direction to the other end portion in the same region AU over a substantially full length, and is extended in the lateral direction. The bottom is fixed. Therefore, according to the elastic member 35a on the abdominal side, lateral stretchability is imparted to a slightly full length of the upper region AU in the transverse direction, and this stretchability becomes the stretchability of the waist opening 1HB of the diaper 1.

The lower region AD is a region in which the portion 10p in which the absorptive core material 11 exists in the absorptive body 10 is superimposed and fixed on the central portion ADc in the horizontal direction. In the lower region AD, the portions ADe and ADe located on both sides of the central portion ADc are not overlapped with the absorbent body 10.

Further, in the same portions ADe and ADe, the elastic member 35 is continuously arranged from the one end portion in the lateral direction to the other end portion of the same portion ADe over a substantially full length, and is fixed in a state of being extended in the horizontal direction. As a result, lateral stretchability is imparted to each of the portions ADe and ADe over a substantially full length range in the lateral direction.

Moreover, in the said central part ADc, the elastic member 35 is arrange | positioned discontinuously in a horizontal direction. In detail, in this example, the end portions of the elastic member 35 are both end portions ADce and ADce in the lateral direction in the central portion ADc, but the central portion ADcc in the lateral direction in the central portion ADc does not exist. The elastic member 35 is therefore disposed discontinuously in the lateral direction in the central portion ADc. As described above, in the case where the elastic member 35 does not exist in the central portion ADcc of the central portion ADc, since the stretchability is hardly imparted to the same central portion ADcc, the horizontal shrinkage of the central portion ADcc is suppressed. Along with this, the horizontal shrinkage of the absorbent core material 11 is also suppressed. Therefore, the absorbent core material 11 can be prevented from being wrinkled, and the skin side surface of the absorbent core material 11 can be maintained to be slightly flat. As a result, the obstruction of the liquid absorption of the absorbent core material 11 can be effectively prevented, and the leakage of excreta due to the generation of wrinkles can also be suppressed.

Furthermore, in this embodiment, the lateral length Wa of the portion where the abdominal-side elastic member 35a is arranged at both ends ADce in the lateral direction of the abdominal-side belt member 30a is longer than the lateral direction of the back-side belt member 30b. The lateral direction length Wb of the portion where the back-side elastic member 35b is arranged at both end portions ADce is longer. In other words, the lateral length of the portion overlapping the absorptive core material 11 in the abdominal-side belt elastic member 35a is longer than the lateral length of the portion overlapping the absorptive core material 11 in the back-side belt elastic member 35b. Such an arrangement effect will be described later with reference to FIG. 5.

In addition, as shown in FIG. 3, an illustration sheet 40 in which an unillustrated illustration of an animal or the like is formed in the central portion ADc of the lower area AD, but the same reason as described above can also prevent the illustration sheet 40 from wrinkling. . Therefore, it becomes easy to see the illustration.

As shown in FIG. 3, a post-treatment belt 50 is provided on the non-skin-side surface of the back-side belt member 30 b. The post-processing tape 50 is an elongated belt-shaped member (belt member) having an adhesive surface, and is fixed to the back-side belt member 30b in a state of being folded with the adhesive surface inside. When the used paper diaper 1 is to be discarded, the paper diaper 1 that is rounded in the longitudinal direction while the absorbent body 10 is inside is extended, the folded post-treatment tape 50 is extended, and the adhesive surface side is wound around the paper diaper. 1. Thereby, the paper diaper 1 can be kept in a rounded state. Thereby, the excrement etc. adhered to the inside (absorbent main body 10) of the paper diaper 1 are not leaked to the outside, and the paper diaper 1 can be discarded.

    <About the positional relationship between the reduced diameter portion 11c and the side edge portion of the belt member>    

In the paper diaper 1 of this embodiment, by adjusting the bonding position of the back side belt member 30b to the absorbent body 10 (especially the reduced-diameter portion 11c of the absorbent core material 11), the paper diaper can be worn when worn. A gap is unlikely to occur between the person's feet and the absorbent body 10 (absorbent core 11). Hereinafter, it demonstrates using a comparative example.

FIG. 5 is a diagram illustrating the positional relationship between the reduced-diameter portion of the absorbent core material 11 and the back side belt member 30b according to this embodiment. FIG. 6 is a diagram illustrating the positional relationship between the reduced-diameter portion of the absorbent core material 11 and the back side belt member 30b in the comparative example.

As described above, in the paper diaper 1, the abdominal-side belt member side edge portion 30ae is joined to the back-side belt member 30be to form the abdominal-side belt member 30a and the back-side belt member 30b into a ring shape, as shown in FIG. Shorts-type diapers. At this time, the abdominal-side band elastic member 35a provided on the abdominal-side band member 30a and the back-side belt elastic member 35b provided on the back-side band member 30b are connected to each other through the joints of the belt-member side edge portions 30ae and 30be, and are stretched. The forces interact with each other. Therefore, in the waist opening 1HB of the diaper 1, the elastic force in the horizontal direction is generated by the elastic member 35a on the abdominal side and the elastic member 35b on the back side. Due to this stretch effect, the opening 1HB is in close contact with the waist of the wearer, and the paper diaper 1 is less likely to be shifted during wear. In addition, since the abdomen-side elastic member 35a and the back-side elastic member 35b respectively pull the absorbent body 10 in the lateral direction, the absorbent body 10 is enlarged outward in the lateral direction, and the wearer's crotch can be widely covered. The lower part. That is, by joining the abdominal-side belt member side edge portion 30ae and the back-side belt member side edge portion 30be, the abdominal-side belt elastic member 35a and the back-side belt elastic member 35b are widened over a wide range of the belt members 30a and 30b. The horizontal stretching force acts.

In addition, the absorbent core material 11 of this embodiment has a reduced-diameter portion in the middle portion (between the abdominal-side end portion 11a and the back-side end portion 11b) in the longitudinal direction as shown in FIG. Interference between the both sides of the absorbent core 11 and the wearer's feet can be suppressed, and the wearer can easily move the feet. In addition, since the absorptive core material 11 is narrower in the diameter-reducing portion, the width in the lateral direction is narrower than that of the abdomen-side end portion 11a or the back-side end portion 11b. The problem of gaps is easy to occur. When a gap is created between the foot of the wearer and the absorbent core material 11, excrement discharged into the absorbent core material 11 may leak from the gap to the outside. In particular, in the case of many babies who are wearing the diaper 1 in a sleeping position, a gap is easily generated on the buttocks side by actions such as foot movement.

On the other hand, in the paper diaper 1 of this embodiment, as shown in FIG. 5, since the back side belt elastic member 35b has the area | region which overlaps with the diameter reduction part 11c of the absorptive core material 11, this gap is hard to generate. In other words, as a part of the position of the back side belt member side edge portion 30be overlaps with the reduced diameter portion 11c of the absorbent core material 11 in the longitudinal direction, it becomes difficult to generate a gap. This is because, in the reduced-diameter portion 11c of the absorbent core material 11, the region overlapping the back-side belt member side edge portion 30be, as described above, passes through the abdominal-side belt elastic member 35a and the back-side belt elastic member 35b. The horizontal stretching force acts, and the reduced diameter portion 11c is pulled outward in the horizontal direction, thereby making it easier to expand in the horizontal direction. Therefore, it is possible to suppress the generation of a gap between the foot of the wearer and the absorbent core material 11.

In addition, as shown in FIG. 6, in the paper diaper 1 of the comparative example, the back side belt member side edge portion 30be of the back side belt member 30 b is tied in the longitudinal direction, and the position does not overlap with the reduced diameter portion 11 c of the absorbent core material 11. . In this case, the lateral stretching force of the elastic member 35a on the abdomen side, the elastic member 35b on the back side, and the like does not act on the reduced-diameter portion 11c of the absorbent core material 11, and the reduced-diameter portion 11c is not directed outward in the lateral direction. Pull. Therefore, a gap is easily generated between the foot of the wearer and the absorbent core material 11.

As described above, in this embodiment, at least a part of the back-side belt member side edge portion 30be and the reduced-diameter portion 11c of the absorbent core 11 are repeated in the longitudinal direction, and the abdominal-side belt elastic member 35a and the back side are overlapped. The elastic force of the elastic member 35b acts on the diameter-reduced portion 11c, and the width of the diameter-reduced portion of the absorbent core 11 can be increased in the lateral direction. Accordingly, it is possible to prevent a gap between the foot of the wearer and the absorbent core material 11 from easily occurring.

In addition, the area where the elastic force of the abdominal-side elastic member 35a and the back-side elastic member 35b acts is not limited to the diameter-reduced part 11c of the absorptive core material 11. In the case of FIG. 5, the back-side end portion 11 b of the absorptive core material 11 also has a region overlapping a part of the back-side belt member-side edge portion 30be in the longitudinal direction similarly. Therefore, a force pulling the back side end portion 11b in the lateral direction also acts. For example, even when the buttocks side of the absorbent core material 11 becomes heavy due to defecation or the like, the back side end portion 11b is pulled outward in the lateral direction (that is, the waist direction), so that the absorbent core material 11 becomes It is not easy to produce position shift. In this embodiment, the length of the longitudinal overlapping region of the back side belt member side edge portion 30be and the absorbent core 11 is at least one-half (1/2) or more (1/2) the length of the back side belt member side edge portion 30be in the longitudinal direction. (See Figure 5). By repeating with the absorptive core material 11 in more than a half of the area of the back side belt member side edge portion 30be, the contraction force of the abdomen side belt elastic member 35a and the back side band elastic member 35b easily acts on the absorptive core. The back side (hip side) area of the material 11.

    <Other effects of diaper 1>    

In the paper diaper 1, the back-side elastic member 35b (abdominal-side elastic member 35a) is located on both sides ADe (refer to FIG. 3) in the lateral direction in the lower region AD, and is disposed in the lateral direction of the absorbent body 10. A part of the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19 provided in a state where the ends are extended in the longitudinal direction intersect. Here, the length in the longitudinal direction of a region where the abdominal-side belt elastic member 35 a intersects the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19 is La. Similarly, the length in the longitudinal direction of the region where the back-side belt elastic member 35b intersects the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19 is Lb.

In such an intersecting area, when the paper diaper 1 is worn, a force pulling the absorbent body 10 in the longitudinal direction is effected by the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19, and the back side is provided with an elastic member. 35b (elastic member 35a on the abdominal side) pulls the absorbent body 10 in a lateral direction. That is, the force which makes the absorptive body 10 (absorptive core material 11) contact | adhere to the body of a wearer is applied.

In addition, the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19 are not arranged in the entire range of the longitudinal direction of the absorbent body 10 in the stretched state, but are arranged in the stretched state in a predetermined region in the longitudinal direction. In the region where the elastic member is arranged in the stretched state, the force for contracting the absorbent body 10 in the longitudinal direction is applied. In the region where the elastic member is not arranged in the stretched state, the force for contraction in the longitudinal direction of the absorbent body 10 is not applied. effect. In this specification, the length in the longitudinal direction of the region where the force contracting in the longitudinal direction acts is also referred to as the [effective length] of the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19. In FIGS. 5 and 6, portions shown by thick dashed lines correspond to the effective lengths of the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19.

As shown in FIG. 6, in the comparative example, the length of La in the intersection region on the abdominal side and the length of Lb in the intersection region on the back side are approximately equal. Specifically, in the area La of FIG. 6, there are seven elastic members 35 a on the abdominal side that intersect with the effective stretched portion of the foot circumference elastic member 17, and in the area Lb of FIG. 6, the effective stretched portion of the foot circumference elastic member 17 There are 7 cross-back-side belt-side elastic members 35b. Therefore, in the comparative example, the force acting on the effective length of the foot circumference elastic member 17 by the back-side belt elastic member 35b (the force pulling outward in the lateral direction) acts approximately equally.

In the case of the comparative example, since a person wearing a paper diaper moves his or her feet, the fit of the absorbent body 10 (absorbent core material 11) may be deteriorated on the back side. Since people move their feet mainly on the front side (abdominal side), the absorbent body 10 (absorptive core material 11) is pulled toward the front side (abdominal side) every time the wearer moves the feet. Since the contraction force of the abdominal-side elastic member 35a (back-side elastic member 35b) is constant, the absorptive body 10 (absorptive core material 11) faces the outer side of the wearer's buttocks laterally than the lateral direction. The pulling force is mainly dominated by the pulling force toward the abdominal side in the longitudinal direction, and it becomes easy to cause the positional deviation of the absorbent body 10 (absorbent core material 11). In this case, when the back side becomes heavier due to defecation or the like, excreta may leak out from a portion where the absorbent body 10 (absorbent core material 11) is shifted to the outside. In particular, when the wearer is an infant, a toddler, etc., since most of them wear a paper diaper in a sleeping position, when a gap is created in the lower inferior part of the back side (buttock side), excrement will easily leak out. In addition, when the force of pulling in the lateral direction on the back side of the absorptive body 10 (absorptive core material 11) is weak, each time the wearer moves the foot, the end portion 10eb of the absorptive body 10 becomes The absorbent body 10 (absorptive core material 11) is easily lifted up and the buttocks are easily exposed.

In contrast, as shown in FIG. 5, in the present embodiment, the length of Lb of the cross region on the back side is longer than the length of La of the cross region on the abdominal side. In other words, the area where the foot circumference elastic member 17 (foot circumference auxiliary elastic member 19) is extended in the longitudinal direction (effective length) intersects with the back side elastic member 35b is larger than the foot circumference elastic member 17 (foot circumference auxiliary Of the elastic member 19), a portion (effective length) in a state of being stretched in the longitudinal direction intersects with a larger area of the abdominal-side elastic member 35a. Specifically, in the area La in FIG. 5, there are seven abdominal-side elastic members 35 a that intersect with the effective elongation of the foot circumference elastic member 17. In contrast, in the area Lb in FIG. There are 10 more elastic members 35b on the back side than the effective elongation portion. Therefore, the absorptive body 10 (absorptive core material 11), the foot circumference elastic member 17, and the like are pulled outwardly in the lateral direction by the back side belt elastic member 35b rather than in the lateral direction by the abdominal side belt elastic member 35a. The pulling force is greater. Thereby, in the paper diaper 1 of this embodiment, the fitting property on the back side can be improved.

Moreover, in this embodiment, the effective length on the back side of the foot circumference elastic member 17 (foot circumference auxiliary elastic member 19) is at least 1/2 or more of the length of the back side belt member side edge portion 30be in the longitudinal direction. In FIG. 5, the effective length Lb of the back side of the foot circumference elastic member 17 is more than a half of the length in the longitudinal direction of the back side belt member side edge portion 30be. In the region of the back side belt member side edge portion 30be, when the abdominal side belt member 30a and the back side belt member 30b are formed into a ring shape, the transverse direction of the abdominal side belt elastic member 35a and the back side belt elastic member 35b is formed. Therefore, in this region, the range that intersects with the foot circumference elastic member 17 (foot circumference auxiliary elastic member 19) is increased, whereby the aforementioned effect can be used to further improve the fit of the diaper 1.

Moreover, in the paper diaper 1 of this embodiment, the lateral length Wa of the part which overlaps with the absorptive core material 11 in the abdominal side elastic member 35a is made into the absorptive core material in the back side elastic member 35b. The length Wb of the portion where the 11 overlaps is long (see FIG. 5), and the strength of the force that the absorptive core material 11 is pulled outward in the horizontal direction can be adjusted. The longer the elastic member overlaps the absorbent core 11, the stronger the elastic member pulls the absorbent core 11 toward the outside in the lateral direction. Therefore, as shown in this embodiment, by shortening the back side The overlapping portion of the belt-elastic member 35b and the absorbent core material 11 is such that the force of pulling the absorbent core material 11 in the lateral direction directly on the back side does not become excessively strong. Thereby, while maintaining the fitting feeling of the absorptive body 10 of the buttocks, a certain space can be formed between the buttocks and the absorptive core material 11, and excreted feces are not diffused and retained in the space. In addition, by increasing the pulling force of the absorptive core material 11 directly in the lateral direction on the abdomen side, the absorptive core material 11 can be brought into close contact with the body and the excreted urine can be suppressed from leaking out.

Moreover, in the paper diaper 1 of this embodiment, each elastic member is provided so that the back side elastic member 35b may expand and contract in the horizontal direction compared with the elastic force when the leg elastic member 17 or the leg auxiliary auxiliary elastic member 19 expands and contracts in the longitudinal direction. The stretching force becomes stronger. That is, each elastic member is arranged such that when the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19 are adhered to the absorbent body 10, the ratio of elongation of the foot circumference elastic member 17 and the foot circumference auxiliary elastic member 19 is increased, When the back-side belt elastic member 35b is stuck to the back-side belt member 30b, the proportion of elongation of the back-side belt elastic member 35b becomes larger. Thereby, the force which expands the absorptive body 10 (absorptive core material 11) laterally becomes stronger, Therefore, the absorptive body 10 (absorptive core material) is made to the hip area of a wearer etc. 11) The width is widened in the horizontal direction to make it easier to suppress the leakage of excrement.

Further, in the paper diaper 1 of the present embodiment, when the paper diaper is worn, it is possible to suppress the uncomfortable feel of the skin on the buttocks side caused by the post-treatment tape 50. In the paper diaper 1, the longitudinal length Lb of the area where the back side elastic member 35b intersects with the foot circumference elastic member 17 is longer than the longitudinal length La of the area where the abdominal side elastic member 35a intersects the foot circumference elastic member 17. That is, the overlapping portion in the longitudinal direction of the back side belt member 30 b and the absorbent body 10 is large. Thereby, the position of the processing tape 50 after being fixed to the non-skin-side surface of the back side belt member 30b becomes easy to overlap the position of the absorptive core material 11 in the thickness direction (refer FIG. 3). In other words, the post-processing belt 50 and the absorptive core material 11 are arranged at positions where at least a part of them overlap in the longitudinal direction. When the wearer wears the paper diaper 1, there is an absorbent core material 11 having a thickness in the thickness direction between the skin (hip) of the wearer and the post-treatment tape 50. Therefore, the absorbent The core material 11 functions as a cushioning body, so that the feeling of the post-treatment tape 50 is not easily transmitted to the wearer's skin (hips), and the occurrence of discomfort can be suppressed.

    === Other implementations ===    

As mentioned above, although the embodiment of this invention was described, the said embodiment is a form for easy understanding of this invention, and is not limited to interpreting this invention. In addition, the present invention can be changed and improved without departing from the scope of its technical ideas, and the present invention naturally includes its equivalents. For example, the following modifications are possible.

In the aforementioned embodiment, in order to reduce the elasticity of the central portion ADc in the lateral direction of the lower region AD in the abdominal-side band member 30a (back-side band member 30b), the elastic member 35a (35b) of the central portion ADc is reduced. Become discontinuous. That is, the elastic member disposed at a position overlapping the reduced-diameter portion 11c of the absorbent core material 11 in the longitudinal direction is disposed so as to be discontinuous at the center portion ADc in the lateral direction of the belt member. As an example of this discontinuous elastic member, as shown in FIG. 3, elastic members 35a (35b) are present at both ends ADce and ADce in the lateral direction in the central portion ADc, but in the central portion The structure of the elastic member 35a (35b) does not exist in the central part ADcc in the horizontal direction in ADc, but it is not limited to this.

That is, if the elastic member 35a (35b) is arranged discontinuously for the central portion ADc for reducing the stretchability of the central portion ADc of the lower area AD, the central portion ADc in the central portion ADc may also be used. There is an elastic member 35a (35b). FIG. 7 is a schematic plan view for explaining this example. In FIG. 7, the non-skin-side nonwoven fabric 31 in the abdominal-side belt member 30 a is removed and the elastic member 35 a is exposed to the outside. In the example of FIG. 7, the elastic member 35 a located at the central portion ADcc is finely divided. When the finely cut state is obtained, elasticity of the elastic member 35a to the central portion ADcc becomes substantially impossible. Therefore, if the elastic member 35a is in the finely cut state, it may exist in the central portion ADcc. The length of the elastic member 35a in the finely cut state is, for example, a length of 0 mm or more and 5 mm or less, and preferably a length of 0 mm or more and 3 mm or less. However, when the finely cut elastic member 35a is present, the appearance is deteriorated. Therefore, it is desirable that the elastic member 35D does not exist in the central portion ADcc (FIG. 3).

In addition, the back side belt member 30b may be arranged on the back side belt elastic member 35b at a position overlapping the reduced diameter portion 11c of the absorptive core material 11 in the longitudinal direction. The back side belt member 30b may extend from one end portion to the other end portion in the horizontal direction. The range so far is continuously arranged. The back side belt elastic member 35b may be continuously arranged in the entire area in the horizontal direction (not shown). As a result, a contraction force in the lateral direction by the elastic member 35b on the back side acts on the central portion ADc. The central portion ADc of the back side belt member 30b is acted on by the telescopic force, so that the foot circumference elastic member 17 (foot circumference auxiliary elastic member 19) and the back side belt member 30b are pulled toward each other at this portion, and the back side belt member 30b is pulled. 30b presses on the hips of the wearer as a whole. This improves the fit on the buttocks. Moreover, even in this case, in the abdominal-side band elastic member 35a provided in the abdominal-side band member 30a, the portion arranged at a position overlapping the reduced-diameter portion 11c of the absorbent core material 11 in the longitudinal direction is the central portion. ADc has a discontinuous section. By preventing the contraction force in the horizontal direction from acting on the back side region of the absorbent core material 11, wrinkles are not caused in the absorbent core material 11 in this region, and it is possible for infants to wear the paper diaper 1 in a sleeping position. No back pain.

In the aforementioned embodiment, the elastic member 35 is arranged in a discontinuous manner at the central portion ADc in the lateral direction of the lower region AD in FIG. 3, but it is not limited thereto. For example, the elastic member 35 may not be disposed in the central portion ADc. That is, in the example of FIG. 3 described above, in the central portion ADc, the end portion of the elastic member 35 is applied to each of the end portions ADce and ADce in the horizontal direction. However, the end portion of the elastic member 35 may not be applied to the central portion ADc. The position of the end ADce.

In the aforementioned embodiment, the materials of the exterior sheet 15b and the belt members 30a and 30b are made of a non-woven fabric, but are not limited to a non-woven fabric. For example, it may be a woven fabric or a sheet member other than a woven fabric. Incidentally, the exterior sheet 15 b may be omitted, and in this case, the leak-proof sheet 15 a becomes the exterior sheet of the absorbent body 10.

In the foregoing embodiment, the rubber thread is used as the elastic member 35 as an example, but it is not limited thereto. For example, a belt-shaped rubber may be used as the elastic member 35, and a belt-shaped nonwoven fabric having elasticity, a resin film having elasticity, or the like may be used.

Claims (5)

    An absorbent article is an absorbent article having a longitudinal direction and a transverse direction crossing the longitudinal direction, and is characterized by having an absorbent body provided along the longitudinal direction to absorb excrement; The central portion of the lateral direction is fixed to the abdominal side band member of the one end portion while covering one end portion of the longitudinal direction of the absorbent body from the non-skin side of the absorbent body; A member with a different band member is provided along the lateral direction, and fixes the central portion in the lateral direction to the other end while covering the other end portion in the longitudinal direction of the absorbent body from the non-skin side of the absorbent body. The back side belt member is provided with elastic members that extend and contract in the lateral direction on the abdominal side belt member and the back side belt member, respectively. The abdominal side belt member has abdominal side belts on both sides of the lateral direction. A member side edge portion, and the back side belt member has a back side belt member side edge portion at both lateral edges of the lateral direction, and is connected by The abdomen-side belt member side edge portion and the back-side belt member side edge portion shape the absorbent article into a cylindrical shape, and the absorbent body includes an absorbent core material formed by laminating a liquid absorbent material, and The absorptive core material is a liquid-impermeable leak-proof sheet covered from the non-skin side of the absorptive core material, and the absorptive core material is between the abdomen side end portion and the back side end portion and has the lateral direction. The width-reducing portion is narrower than the abdomen-side end portion and the back-side end portion, and at least a part of the back-side belt member side edge portion has a position overlapping the diameter-reducing portion in the longitudinal direction and is provided on the back side. The elastic member of the belt member has a portion that is discontinuous from one end portion to the other end portion in the horizontal direction. In the longitudinal direction, the elastic member disposed in the back side belt member is disposed in a manner overlapping with the reduced diameter portion. The number of the elastic members at the positions is smaller than the number of the elastic members arranged at positions overlapping the unreduced diameter back side end portions.         For example, in the absorbent article according to the first patent application range, in the longitudinal direction, the narrowest portion of the reduced diameter portion is located between the abdominal side band member and the back side band member.         For example, in the absorbent article according to item 1 or 2 of the patent application scope, in the longitudinal direction, the length of the overlapping portion between the reduced diameter portion and the abdominal side belt member is longer than that of the reduced diameter portion and the back side belt member. The length of the overlapping portion is long.         For example, in the absorbent article according to the scope of patent application, the number of elastic members arranged in the longitudinal direction in the elastic member disposed on the abdominal side belt member overlapping the reduced diameter portion is relatively arranged. Among the elastic members of the back side belt member, the number of elastic members provided at positions overlapping the reduced diameter portion is large.         For example, the absorbent article according to item 1 or 2 of the patent application scope, wherein the stretched part of the foot circumference elastic member disposed along the longitudinal direction closer to the outer side of the transverse direction than the absorptive core material and disposed in the aforementioned The length in the longitudinal direction of the area where the elastic member of the back side band member intersects is the length in the longitudinal direction of the area where the elastic part of the foot circumference elastic member intersects with the elastic member arranged on the abdominal side band member. The length is long.