WO2014057974A1

WO2014057974A1 - Open-type disposable diaper

Info

Publication number: WO2014057974A1
Application number: PCT/JP2013/077466
Authority: WO
Inventors: 賢一笹山; 邦彦桂川
Original assignee: ユニ・チャーム株式会社
Priority date: 2012-10-12
Filing date: 2013-10-09
Publication date: 2014-04-17
Also published as: JP2014079290A; JP6172908B2

Abstract

The present invention provides an open-type disposable diaper which facilitates the operation of putting on and removing the diaper from a wearer in a standing position and in which a front waist area stably fastens during the operation of putting on the diaper as well as during wear. At least one of belt extending portions (26) of an elastic waist belt (16) comprises a first elastic area (41) which extends outwards in a lateral direction (X) from a side edge of a liquid-absorbing structure (14), a second elastic area (42) which is spaced from and opposes the first elastic area (41) in the lateral direction, and a non-elastic area (40) which is located between the first and second elastic areas. A second fastening means (18) is composed of a first fastening portion (74) which is located on a side facing the skin of a front edge area (51) of a chassis (15) and a second fastening portion (75) which is located on a side not facing the skin of the non-elastic area.

Description

Open type disposable diaper

The present invention relates to disposable diapers, and more particularly to open-type disposable diapers.

Conventionally, open disposable diapers having a chassis and an elastic waist belt that fits around the waist of the wearer are known. For example, in Patent Document 1, a chassis having a liquid absorbing structure extending from the crotch area to the front and rear waist areas, an elastic waist panel extending from the rear side of the crotch area to the rear waist area, and both sides of the elastic waist panel An open type disposable diaper is disclosed having a pair of elastic belt portions provided with a fastener portion on at least one side.

JP-A-2005-270359 (P2005-270359A)

In the open-type disposable diaper disclosed in Patent Document 1, the two belt extension parts are bent inward so as to overlap with each other, and the fastener part of one belt extension part is retained on the outer surface of the other belt extension part. Thus, a looped elastic waist belt is defined by the elastic belt portions and the elastic waist panel. By connecting a fastener portion located on the inner surface of the front waist region to a fastener receiving portion located on the outer surface of the elastic waist belt, it can be assembled in a pant form, and a diaper even in the standing position of the wearer Can be worn easily.

However, in such a diaper, the fastener receiving portion located on the skin facing surface of the front waist region is retained to the fastener receiving portion located in the elastic region of the elastic waist belt, so the fastener receiving portion is deformed and the fastener portion is stable. The fastening force of the fastening means may be reduced. Thus, when the fastening means can not exert the required fastening force, there is a risk that the front waist region of the diaper may slip down or slip off during or during the wearing operation.

Therefore, an object of the present invention is an improvement of the prior art, in which the user in the standing position can be easily attached and detached, and the front waist region is stable during the wearing operation and during wearing It is an object of the present invention to provide an open-type disposable diaper that is

In order to solve the above-mentioned subject, the present invention is characterized in that a longitudinal direction parallel to the longitudinal axis and a lateral direction parallel to the transverse axis, a skin facing surface and a non-skin facing surface, a front waist region, a rear waist region, It has a crotch area located between the waist areas, and has an absorbent structure disposed at least in the crotch area, and a front end area located in the front waist area and a rear end area located in the rear waist area. An open type disposable diaper including a chassis and an elastic waist belt connected to a rear end area of the chassis.

In the open type disposable diaper according to the present invention, the non-skin of the elastic waist belt connected via a first fastening means for connecting the side edges of the elastic waist belt with each other via the first fastening means. A second fastening means for retaining the front end area of the chassis on the opposite surface, the elastic waist belt extending from the opposite side edges of the rear end area of the chassis to the pair of belts extending laterally outward A first elastic region extending in the lateral direction from the side edge of the liquid absorbing structure, and at least one of the pair of belt extension portions. And a second elastic area spaced apart and opposed in the lateral direction, and an inelastic area located between the first and second elastic areas, wherein the second fastening means comprises the shears. Wherein a first hooking portion located on the skin-facing surface side of the front end region, characterized in that it is composed of a second hooking portion located on the non-skin facing side of the non-elastic region of.

According to the open-type disposable diaper according to one or more embodiments of the present invention, the elastic waist belt stretches, so that the diaper does not slip down or slip off during the wearing operation or during the wearing. In addition, when the fastener receiving portion constituting the second fastening means is positioned in the inelastic region of the elastic waist belt, its planarity is maintained, and the fastener receiving portion is deformed by the expansion and contraction of the elastic region and the second fastening is performed. The front end area of the chassis can be stably connected to the elastic waist belt without the fastening force of the means being reduced.

The drawings illustrate specific embodiments of the present invention and include optional and preferred embodiments in addition to the essential features of the invention.
The perspective view which shows the wearing condition of the open-type disposable diaper in 1st Embodiment of this invention. The expansion | deployment top view which cancelled | released the 1st and 2nd fastening means, expand | deployed the diaper, and was seen from the skin opposing surface. The disassembled perspective view of a diaper. The figure which looked at the elastic waist belt from the back in the unfolded state of a diaper. The figure which shows a mode that the 1st fastening means at the time of wearing a diaper was connected. The figure which shows a mode when connecting the 2nd fastening means when wearing a diaper. The expansion | deployment top view of the diaper in 2nd Embodiment. The development top view which showed only an elastic waist belt of a diaper in a 2nd embodiment with a solid line. The figure similar to FIG. 4 in 3rd Embodiment. The expansion | deployment top view of the diaper in 4th Embodiment. The partially broken top view of the liquid absorption layer in 4th Embodiment. Partially broken plan view of the liquid absorbent structure in the fifth embodiment The partially broken top view of the liquid absorption structure in 6th Embodiment.

The following embodiments relate to the open-type disposable diaper shown in FIGS. 1-13, and include optional and preferred configurations in addition to the essential components of the invention.
First Embodiment
1 to 3, the open type disposable diaper 10 according to the present embodiment has a longitudinal direction Y parallel to the longitudinal axis P and a transverse direction X parallel to the transverse axis Q, a skin facing surface and a non-skin facing surface , The front waist region 11, the rear waist region 12, the chassis 15, and the liquid absorbing structure 14 disposed on the skin facing surface of at least the crotch region 13, the crotch region 13 and the rear waist region 12 in the chassis 15 And an elastic waist belt 16 extending in the lateral direction X. When the diaper 10 is worn, the side edges of the elastic waist belt 16 are connected to each other via the first fastening means 17 and the front end 51 of the chassis 15 defining the front waist area 11 serves as the second fastening means 18. The waist opening 19 and the pair of leg openings are defined by being connected to the outer surface of the elastic waist belt 16 via the belt.

Referring back to FIG. 2, the elastic waist belt 16 extends straight in the lateral direction X, and the

outside edges

16 a and 16 b opposite to each other in the longitudinal direction Y and opposite to each other in the lateral direction X. The elastic panel 20 has an oblong rectangular shape defined by the convex side edge 16c and the side edge 16d extending straight in the longitudinal direction Y, and the inner surface of the central portion of the belt is connected to the chassis 15 A retention tab 22 attached to one side of the elastic panel 20 and a retention tab 24 attached to the other side. The elastic waist belt 16 is divided into a central portion 25 connected to the chassis 15 and a belt extending portion 26 extending outward in the lateral direction X from both

side edges

15 c and 15 d of the rear end area 52 of the chassis 15 for convenience of description. Be done. The fastener portion 27 is located on the skin-facing surface of the retaining tab 22, and the non-skin-facing surface of the retaining tab 24 is located the fastener receiving portion 28 to which the fastener portion 27 is separably secured. The fastener portion 27 and the fastener receiving portion 28 formed of a loop or the like constitute a first fastening means 17 for releasably connecting both side edges of the elastic waist belt 16 to each other.

Referring to FIGS. 3 and 4, the elastic panel 20 includes a first sheet 31 located on the skin facing surface side and a second sheet 32 located on the non-skin facing surface side, both

sheets

31 and 32 being Are bonded to each other via, for example, a hot melt adhesive (not shown) applied to any one of the opposite surfaces of the A plurality of waist elastic bodies 33 extending in the lateral direction X are disposed between the first and

second sheets

31 and 32, whereby the elastic panel 20 is elastically elasticized so as to be stretchable in at least the lateral direction X. . The elastic panel 20 intersects the rear end area 52 of the chassis 15 and extends continuously from the both

side edges

15 c and 15 d to the outside in the lateral direction X, and on both sides of the first elastic area 41. It has an inelastic area 40 located adjacent to each other and a second elastic area 42 located between the inelastic area 40 and the

side edges

16c and 16d. Further, in the central portion of the first elastic region 41, the waist elastic body 33 is not disposed in a portion intersecting the rear end region 52 of the liquid absorbent structure 14 in the chassis 15, and the central inelastic region 43 is It is defined. The waist elastic body 33 is formed with a rear central elastic region 44 connected in the lateral direction X outside the central inelastic region 43 in the longitudinal direction Y.

In the present embodiment, in the both belt extension parts 26, the first elastic area 41 and the second elastic area 42 are separated in the lateral direction X, and the inelastic area 40 is located between them, as described later. As long as the effect is achieved, such a configuration may be provided in at least one of the belt extension parts 26 and the inelastic area 40 may not be located in the other belt extension part 26. Also, unlike the present embodiment, the rear central elastic region 44 forms a space in a state in which the central inelastic region 43 and the portion of the straight rear central elastic region 44 do not exist, and the first and second sheets 31, A piece obtained by forming a separate sheet piece from 32 and arranging an elastic body separate from the waist elastic body 33 outside the longitudinal direction Y of the sheet piece is provided to intervene in the space. be able to. In this case, by adjusting the thickness, expansion ratio, etc. of the elastic body to be arranged, the expansion stress by the rear central elastic area 44 is made higher than that of the first and second

elastic areas

41, 42, and the elastic waist is The belt 16 can also be fitted to the wearer's back.

The first and second

elastic regions

41 and 42 may be stretchable sheets in addition to thread-like, string-like or strand-like elastic bodies, or the entire elastic panel 20 may be stretchable sheets. In the present invention, the “inelastic region” is a region where the elastic force of the waist elastic body 33 made of thread-like, string-like, strand-like or sheet-like elastic material is not developed, and substantially the waist elastic body 33 is It means a region where no elastic part (stretching functional part) is provided. Therefore, in the inelastic region, the snapback (a non-fixed portion of the elastic member not fixed to the sheet is cut and the vicinity of the joint end fixed to the first and

second sheets

31 and 32 by its own shrinkage) It can be said that even if the portion returned to the end extends to the inelastic region, the after-mentioned effects can be produced by forming the inelastic region in the elastic panel 20. Further, as a method of defining the non-stretchable area, in addition to the snapback, the waist elastic body 33 is fixed in the non-elastic area, and the elastic force is not expressed with the first and

second sheets

31 and 32. Multiple cutting in the lateral direction X may be performed.

The first and

second sheets

31, 32 can be formed, for example, of a liquid-impervious SMS (spunbond, meltblown, spunbond) fibrous nonwoven fabric or spunbond nonwoven fabric having a weight of about 10 to 20 g / m ² . The waist elastic body 33 has a plurality of thread-like, strand or string-like elasticity with a fineness of about 300 to 1200 dtex, an elongation ratio of about 1.5 to 3.5 times, and a separation dimension (pitch) of about 5 to 15 mm in the longitudinal direction Y. It can be formed of a material.

The retaining tab 22 has a substantially trapezoidal shape that is convex outward in the lateral direction X, and for example, two sheets 46 of a non-stretchable non-woven fabric and / or a plastic sheet having a mass of about 20 to 60 g / m ^2. , 47 are formed on top of each other. The inner part of the sheet 46 forming the retaining tab 22 is joined to the non-skin facing surface of one side edge of the first sheet 31, and the inner part of the sheet 47 is non-skin facing one surface of the second sheet 32 The two

sheets

46 and 47 are joined via a known joining means such as a hot melt adhesive or a thermal welding means with the side edges of the elastic panel 20 interposed between the both

sheets

46 and 47 joined to the surface. Be done. The retention tab 22 is preferably formed of a sheet material that is more rigid than the first and

second sheets

31, 32 and is more rigid than the elastic panel 20. Therefore, the planarity of the fastener portion 27 is secured, and there is no possibility that the fastener portion 27 is deformed during the wearing operation to lower the fixing strength with the retaining tab 24.

The retention tab 24 has a rectangular shape extending in the lateral direction X from the elastic panel 20, and preferably, two sheets of non-stretchable non-woven fabric and / or plastic sheet, preferably having a mass of about 20 to 60 g / m ² The

sheet

48, 49 of the The inner portion of the sheet 48 forming the dominating tab 24 is joined to the non-skin facing surface of the other side edge of the first sheet 31, and the inner portion of the sheet 49 is the non-skin of the other side edge of the second sheet 32. Both

sheets

46 and 47 are joined via a known joining means such as a hot melt adhesive or a thermal welding means, with the side edges of the elastic panel being interposed between the two

sheets

48 and 49, which are joined to the opposite surface. It is joined. The retention tab 24, like the retention tab 22, is preferably formed from a sheet material that is more rigid than the first and

second sheets

31, 32 and has a higher rigidity than the elastic panel 20. Therefore, since the planarity of the fastener receiving portion 28 positioned on the retention tab 24 is maintained, the fastener receiving portion 28 is deformed during the wearing operation to reduce the area of fastening with the fastener portion 27, There is no fear that their retention strength will decrease.

The chassis 15 extends in the longitudinal direction Y between the front and rear end edges 15a and 15b, which extends straight in the lateral direction X, and on both side edges 15c and 15d, the center of which is concavely curved inward. Have a longitudinal shape defined by The chassis 15 is further located between the cover sheet 50, the front end area 51 located in the front waist area 11, the rear end area 52 located in the rear waist area 12, and the front and

rear end areas

51 and 52. And an intermediate portion 53 located on the The cover sheet 50 is formed of a liquid-impervious fibrous nonwoven sheet, an air-permeable and liquid-impervious plastic film, or a laminate thereof. The cover sheet 50 has a main portion 56 in which the liquid absorbing structure 14 is disposed, and both side portions 57 positioned on both sides in the lateral direction X, and the both side portions 57 are bent inward and the main portion It is fixed at 56. Specifically, for example, the both side portions 57 are folded between the front and rear fixed ends 60 and 61 fixed to the main body 56 via the bonding area 58 to which the hot melt adhesive is applied and the front and rear fixed ends 60 and 61, for example. It has a fixed side portion 63 extending in the longitudinal direction Y along the curved portion (both side edges 15c and 15d of the chassis 15). The fixed side portions 63 of the both side portions 57 are formed in a concave shape outward in the lateral direction X at the central portion, and a plurality of threads or strings are formed along the concave side edges (leg opening edges) 15c, 15d. Alternatively, a strand-like leg elastic body 62 is disposed so as to be stretchable. Thus, the dimension in the transverse direction X between the outer edges of both fixed sides 63 is smaller than when the fixed side 63 is not formed, and the fixed side 63 is caught when the wearer passes the leg through the leg opening Can be prevented, and the fit to the thigh can be improved. Moreover, since the leg elastic body 62 in the fixed side 63 is continuous, when the leg elastic body 62 is cut together with the fixed side 63, the cut site is generated, and there is no cut site here. There is no risk that the cutting site will touch the wearer's thighs to stimulate or part of them will come out. Also, when the

concave side edges

15c, 15d are formed by cutting the fixed side where they are located, the cut line is made into a shape that is curved more gently and gently, so that the leg elasticity of the entire crotch area 13 is obtained. The body 62 may be arranged.

A sleeve-like portion is formed by folding back the inner edge of each side portion 57, and in the sleeve-like portion, a plurality of thread-like, string-like or strand-like cuff elastic bodies 64 extending straight in the longitudinal direction Y are formed. It is fixed to be contractible under extension. The sleeve-like portion is separated from the skin-facing surface of the main portion 56 by the contraction action of the cuff elastic body 64 in the worn state of the diaper 10, and a pair of barrier cuffs 57a for preventing lateral leakage of excrement is formed. The leg elastic body 62 and the cuff elastic body 64 can be made of, for example, an elastic material having a fineness of 470 to 940 dtex and an expansion ratio of about 1.5 to 2.8.

By arranging the leg elastic body 62, the leg opening edge fits the wearer's thigh, and the cuff elastic body 64 fits the barrier cuff 57a to the wearer's thigh, so waste is excreted. Side leakage can be reliably prevented. In addition, when the diaper 10 is pulled up / down in the pants form, there is no fear that the leg opening edge may be bent or twisted.

The liquid-absorbent structure 14 is fixed to the skin-facing surface of the main part 56 of the cover sheet 50 via, for example, a hot melt adhesive, and formed from the liquid-absorbent layer 65 and the liquid-permeable sheet. And a body-side liner 66 covering at least the skin-facing surface side. Absorbent layer 65 is a so-called superabsorbent polymer particle (SAP) which is water-insoluble and has an absorbency of at least 10 times its own weight, absorbent formed from wood fluff pulp, a mixture optionally containing a few optionally thermoplastic fibers It is formed by encapsulating the sexing core with a liquid permeable sheet such as a hydrophilic SMS nonwoven. A liquid-impervious barrier sheet 67 larger than its outer dimension is disposed on the bottom of the liquid-absorbent structure 14.

The chassis 15 has a connecting panel 68 which extends in the lateral direction X along the front end edge 11a in the front waist area 11 and is arranged to cross the front end areas of both barrier cuffs 57a. The connection panel 68 has an inner surface sheet 70 located on the skin-facing surface side, an outer surface sheet 71 located on the non-skin-facing surface side, and a filament, strand, or string attached shrinkably between them. And an elastic body 72 of The connection panel 68 includes a front central elastic region 73 in which the elastic body 72 is disposed, non-elastic both side portions located on both sides in the lateral direction X of the front central elastic region 73, and skin opposing surfaces on both sides. And a pair of fastener portions 74 formed of hooks or the like.

Referring to FIG. 4, a non-skin facing surface of the retention tab 24 of the elastic waist belt 16 is a fastener receiving part formed of a loop or the like in which the fastener part 27 of the retaining tab 22 is separably retained. A fastener receiving portion 75 formed of a loop or the like is disposed on the non-skin facing surface side of the side non-stretchable area 40, on which the fastener portion 74 of the connection panel 68 is detachably fixed. Ru. The fastener portion 74 and the fastener receiving portion 75 constitute a second fastening means 18 for connecting the front end area 51 of the chassis 15 to the elastic waist belt 16.

The

fastener portions

27, 74 are formed of a relatively rigid and tensile sheet material such as a plastic film, and have hooks of mechanical fasteners. Also, in the case where the outer surfaces of the retention tab 24 and the belt extension 26 where the

fastener portions

27 and 74 are retained are formed of a plastic film, etc., the pressure-sensitive adhesive is replaced with the hook elements. It can also be applied and formed, in which case the surface is coated with a silicone coated separator to protect the fastener portion.

The

fastener receiving portions

28 and 75 are mechanical formed on the surface of the base sheet, and the base sheet formed of a sheet material having relatively high rigidity and tensile strength such as plastic film, fiber non-woven fabric, and laminate thereof. Formed from the loop element of the fastener. However, when the base sheet is formed of a non-woven fabric, it may not have mechanical loop elements, and when the

fastener portions

27 and 74 have hook elements, the retention tab It is also possible to form the sheet 49 forming the outer surface and the second sheet 32 forming the outer surface of the belt extension 26 from a fibrous non-woven fabric, and to fasten the

fastener portions

27 and 74 directly to the sheet.
Further, although not shown in the present invention, the fastening means 17 and 18 may be any ones having a pair of fastening elements which can be separably attached to each other, and the

fastener portions

27 and 74 may be loop groups of mechanical fasteners. The

fastener receiving portions

28 and 75 may have hook groups, and the connection by the first and second fastening means 17 and 18 may be made by their mutual engagement.

Referring to FIG. 5, when wearing the diaper 10, first, with the wearer standing or lying down, the skin-facing surface of the elastic waist belt 16 is placed on the back side, and the wearer himself or a wearing assistant wears it. Grasping both belt extensions 26 of the elastic waist belt 16 and pulling them so as to wrap them around the waist from the back to the belly of the wearer, the skin-facing surface of the retention tab 22 is retained They are superimposed on one another so as to abut the non-skin facing surface of the tab 24 and the fastener portion 27 is retained in the fastener receiving portion 28. Next, as shown in FIG. 6, the front end area (front waist area 11) 51 of the chassis 15 is grasped and the front waist area 11 is pulled from the thigh (forward or backward). The skin facing surface is folded towards the wearer's ventral side to abut the elastic waist belt 16 attached to tighten the wearer's waist circumference. In such a state, the diaper 10 is in the form of a pant by fixing the fastener portion 74 located on the skin-facing surface side of the front end area 51 to the fastener receiving portion 75 located opposite to it.

Thus, in the case of the open-type disposable diaper 10 according to the present invention, the elastic waist belt 16 is wound around the waist of the wearer by the fastening of the first fastening means 17 and then the front end region 51 of the chassis 15 is belted Since it can be attached to the outer surface of the extension part 26, the wearing operation can be easily performed even when the wearer is standing. In addition, for example, when the wearer excretes in the toilet seat, the diaper 10 having the pants form can be pulled down to the foot with clothes such as trousers in the same state, and after excreted, when standing up from the state sitting on the toilet seat Since the diaper 10 in the state of being pulled down to the foot can be pulled up with the clothes and worn, it is possible to carry out the excretion operation smoothly. In particular, when the wearer is an elderly person, unlike the pants-type diaper, the user can perform the wearing operation in the standing / recumbent position without passing the leg through the leg opening, and thus the diaper at the time of excretion etc. 10 can be raised and lowered together with the clothes in the form of a pant, so it is possible to encourage the elderly to excrete on their own. That is, elderly people who can stand up on their own are relieved of the inconvenience of removing the diaper 10 at the time of excretion, so that they can excrete in the toilet alone at night even without the attendants of wearing assistants or assistants. You can go out without worrying about excretion during the day, and you can live daily life more actively. In addition, in the case of the elderly who can stand up by receiving assistance, the wearing assistant can raise and lower the diaper 10 together with the clothes such as the pants at the time of excretion, so it is usually removed completely from the body at the time of excretion. The time during which the negative part is exposed is shorter than that of the open-type diaper, and the embarrassment due to the negative part exposure is reduced.

Referring to FIG. 4, in each belt extension portion 26, the dimension in the lateral direction X of the elastic region is, for example, about 50% or more with respect to the dimension L in the lateral direction X, preferably the first elastic region 41. Is preferably about 30 to 80% of the dimension L, for example, and about 5 to 55% of the second elastic region 42 in the lateral direction X, for example . When the dimensional ratio of the elastic region to the dimension L in the lateral direction X of each belt extension portion 26 is 50% or more, as shown in FIG. Since the waist opening edge can be extended and expanded while being rolled down, the pull-up / pull-down operation of the diaper 10 at the time of excretion becomes easy.

The elastic waist belt 16 is formed with a sufficiently large elastic area, while the inelastic area 40 is provided between the elastic waist belt 16 and the first and second

elastic areas

41 and 42 so that the fastening force of the second fastening means 18 can be reduced. Deterioration is prevented. That is, in order to stably fasten the fastener portion 74 in the fastener receiving portion 75, a sufficient area for engagement between the hook element of the fastener portion 74 and the loop element of the fastener receiving portion 75 can be secured. The fastener receiving portion 75 itself is required to maintain flatness, and the fastener receiving portion 75 is located in the first or second

elastic region

41, 42, and is deformed along with its expansion and contraction to make the surface uneven. In the case of having a shape, the loop element is not fastened to the hook element in the recess, and the fastening strength between the fastener portion 74 and the fastener receiving portion 75 may be reduced. In the present embodiment, positioning of the fastener receiving portion 75 in the inelastic region 40 maintains flatness without deformation of the fastener receiving portion 75 due to contraction of the first and second

elastic regions

41 and 42. Therefore, the second fastening means 18 can exert the required fastening force.

Further, in the general (mechanical) fastening means, the area of the target area (fastener receiving portion) is formed larger than that of the hook material (fastener portion). Referring to FIG. The dimension W1 in the lateral direction X of the fastener portion 74 is larger than the dimension W2 in the lateral direction X of the fastener receiving portion 75. Therefore, when the fastener portion 74 is fastened to the fastener receiving portion 75, a part of the fastener portion 74 does not overlap with the fastener receiving portion 75, but even in such a fastening mode, the diaper 10 is pulled up / down. It is possible to exert sufficient fastening strength to the extent that operation can be performed. As described above, by setting the size of the fastener receiving portion 75 to a necessary and sufficient size while sufficiently securing the range of the elastic region in the elastic waist belt 16, the excellent operability and sufficientness of the diaper 10 can be obtained. It can be made compatible with the fixing strength.

Further, by the front central elastic region 73 being positioned in the front waist region 11, the wearer / wearing assistant holds both sides of the front waist region 11 with both hands when wearing the diaper 10, and the entire front waist region 11 By overlapping the front end area of the chassis 15 on the non-skin opposing surface of the elastic waist belt 16 while stretching the front central elastic area 73 in the lateral direction X so as to prevent wrinkles, interlocking with the expansion and contraction of the elastic waist belt 16 The front waist region 11 can be expanded and contracted, and a virtual elastic band is formed all around the waist of the wearer. As a result, the front waist region 11 is expanded and contracted in accordance with the movement of the wearer's body, so that wrinkles that impair the appearance occur on the surface of the front waist region 11, and the front waist region 11 and the wearer's body There is no gap between them that causes leakage of excrement.

Second Embodiment
7 and 8, the elastic waist belt 16 according to the present embodiment has a shape in which the central portion is convex toward the horizontal axis Q, and a buttocks cover portion that covers the buttocks of the wearer in the worn state Including 80.

The buttocks cover 80 includes the first and

second sheets

31 and 32 and a buttocks elastic body 81 formed of a plurality of thread-like, string-like or strand-like elastic materials fixed in an expandable manner therebetween, and the buttocks And a heel elastic region 82 in which the elastic body 81 is disposed. The buttocks elastic body 81 extends diagonally to the longitudinal axis P on both sides of the liquid absorbent structure 14. The buttocks cover 80 can be elasticized by the buttocks elastic body 81 to fit the buttocks of the wearer and to have an appearance like an undergarment in a rear view. Further, the rear end region 52 of the chassis 15 and a part of the intermediate portion 53 on the rear waist region 12 side are joined to the buttocks cover portion 80 via, for example, a joining region (not shown) coated with a hot melt adhesive. Ru. Thereby, the side portions 57 of the chassis 15 expand and contract in conjunction with the buttocks cover portion 80, so that in the wearing state of the diaper 10, the entire chassis 15 is pulled back and fitted more in accordance with the movement of the wearer's body. be able to.

Referring to FIG. 8, no buttock elastic member 81 is disposed at the central portion of buttocks cover portion 80, and a rear central elastic region 44, a first elastic region 41, and buttocks are provided at the central portion of elastic waist belt 16. A central inelastic area 85 surrounded by the elastic area 82 is located. Since the central inelastic region 85 is formed, the contraction of the waist elastic body 33 and the buttock elastic body 81 does not directly act on the rear end region of the liquid absorbing structure 14 intersecting the elastic waist belt 16. There is no possibility that the rear end area is deformed or wrinkles are formed to reduce its absorption performance. In addition to the present embodiment, the waist cover portion 80 is made elastic by extending a part of the waist elastic body 33 inward so as to incline with respect to the longitudinal axis P without using the waist elastic body 81. Alternatively, the buttocks cover 80 may be formed of a separate panel from the central portion 25 and the belt extension 26.

Third Embodiment
With reference to FIG. 9, in the diaper 10 according to the present embodiment, the base sheet forming the

fastener receiving portions

28 and 75 positioned on the non-skin opposing surface side of the elastic waist belt 16 and the second to which it is fixed An illustration sheet 88 having a plurality of decorative elements 87 visible from the outside is disposed between the sheet 32 and the sheet 32. The site where the

fastener receiving portion

28, 75 is disposed is a non-elastic region, which is different from the first and second

elastic regions

41, 42 in touch etc. However, the wearer of the diaper 10 and the wearing assistant In particular, the position and size of the fastener receiving portion 75 located between the first elastic region 41 and the second elastic region 42 can not be grasped. As in the present embodiment, by arranging the illustration sheet 88 visible from the outside on the inner surface of the base material sheet forming the

fastener receiving portion

28, 75, the position of the target to which the

fastener portion

27, 74 is attached As the range can be easily visually recognized, the wearing operation can be easily performed, and the appearance is also preferable. The illustration sheet 88 can be formed from a fiber non-woven sheet or a plastic sheet, and as the decorative element 87, in addition to various known patterns, for example, coloring indication other than white (coloring), character, trademark, product quality indication and size Display etc. can be used.

Fourth Embodiment
Referring to FIGS. 10 and 11, in the present embodiment, the absorbent layer 65 of the absorbent structure 14 mainly includes an absorbent core formed of superabsorbent polymer particles, and the absorbent core, for example, A first sheet 91 formed of a liquid-permeable fibrous nonwoven fabric having a mass of about 8.0 to 15.0 g / m ² , preferably a mass of about 10.0 g / m ² ; A fibrous non-woven fabric such as a liquid-permeable or liquid-impermeable SMS fiber non-woven fabric having a weight of about 8.0 to 15.0 g / m ² , preferably 11.0 g / m ² , or an impervious plastic film And the formed second sheet 92.

The absorbent layer 65 further includes a substantially rectangular absorption area 93 separated by a given dimension in the longitudinal direction Y, in which the absorbent core is disposed, and the absorbent core is not substantially disposed. And a non-liquid absorption area (seal portion) 94 formed to surround the liquid absorption area. In the present embodiment, the liquid absorption area 93 is divided into ten areas, but the area and the number of areas can be appropriately changed according to the absorption performance required of the liquid absorption structure 14, for example , 10 or more, or may be formed from only one area extending all over the liquid absorbing structure 14.

In the liquid absorbing region 93, on the inner surface of the first sheet 91, for example, the mass of about 30 ~ 300g / ^{m 2} by means of hot melt adhesive 96, preferably, the absorbent polymer particles of the mass about 40 ~ 280g / ^{m 2} 95 is fixed almost uniformly. In order to adjust the absorption rate of the whole absorbent layer 65, for example, two types of particles having different absorption rates can be used in combination with the absorbent polymer particles 95. In addition, as long as the effects of the present invention described below can be obtained, the absorbent core may contain not only the absorbent polymer particles 95 but also known materials such as fluff pulp and optionally thermoplastic fibers at a relatively low mixing ratio. You may include in a part. Specifically, in the case of mixing water-absorbent fibers such as fluff pulp, it is preferable to be mixed at a ratio of about 30% by mass or less with respect to the entire absorbent core. As the hot melt adhesive 96, various known ones can be used, but after the absorption of the body fluid, in order to prevent the absorptive polymer particles 95 from peeling off from the first sheet 91, it is made hydrophobic. It is preferable to use an adhesive having one.

As described above, since the absorbent core of the liquid absorbent layer 65 is formed only of the absorbent polymer particles 95 and the sheet member that encloses the absorbent polymer particles 95, the absorbent core of the liquid absorbent structure 14 is composed of the absorbent polymer particles. It is thinner than when it is formed from a mixture of 95 and fluff pulp. Therefore, even if the wearer is in a state of being bent forward while wearing the diaper 10, the front waist region 11 does not get stiff and deforms flexibly according to the movement of the wearer's body, so that the wearing feeling is excellent.

Fifth Embodiment
Referring to FIG. 12, in the present embodiment, the leg elastic body 62 is cut together with the fixed side portion 63. Also in this aspect, as in the first embodiment, the fixed side portion 63 is cut in a concave shape, so that the dimension in the lateral direction X between the outer edges of the fixed side portion 63 becomes smaller, and wear The fixed side 63 can be prevented from being caught when the person passes the leg through the leg opening, and the fit to the thigh can be improved.

Sixth Embodiment
Referring to FIG. 13, in the present embodiment, the bonding area 58 at the fixed side 63 has a concave shape toward the outside in the lateral direction X, and a non-fixed area between the side edge 15 c and the bonding area 58. 98 are formed. In the first and fifth embodiments, even if a part of both side parts 57 is cut and cut into a curved shape in consideration of the skin contact, it is a wearer Direct contact with the inside of the thighs may cause irritation. In the case of the present embodiment, the relatively high rigidity portion where the bonding area 58 is located is not in direct contact with the skin, so that the skin contact can be further improved.

In addition to the materials described herein, various known materials commonly used in this type of article can be used without limitation for each component constituting the diaper 10. Also, in the specification and claims of the present invention, the terms "first", "second" and the like are used merely to distinguish similar elements, positions.

The disclosure of the present invention described above can be organized at least into the following items.
It has a crotch area located between the front waist area, the front waist area, the front waist area, and the front and rear waist areas, the skin facing surface and the non-skin facing surface, the front waist area, the rear waist area, and the horizontal direction parallel to the vertical axis. A chassis having at least a liquid absorbing structure disposed in the crotch region, a front end region located in the front waist region, and a rear end region located in the rear waist region; and a rear end region of the chassis An open-type disposable diaper including an elastic waist belt, the first fastening means for connecting the side edges of the elastic waist belt to each other, and the elastic waist belt connected via the first fastening means The elastic waist belt further includes second fastening means for retaining the front end area of the chassis on the non-skin facing surface, and the elastic waist belt has both side edges of the rear end area of the chassis. A pair of belt extensions extending outward in the lateral direction, and an elastic region which is stretchable in the lateral direction, at least one of the belt extensions being in the lateral direction from the side edge of the liquid absorbing structure A first elastic area extending outward in a direction, a second elastic area spaced apart and opposed in the lateral direction with the first elastic area, and an inelastic area located between the first and second elastic areas, The second fastening means includes a first retaining portion located on the skin facing surface side of the front end area of the chassis, and a second retaining portion located on the non-skin facing surface side of the inelastic region. Said diaper characterized by

The above invention can include at least the following embodiments.
(1) The dimension in the lateral direction of the elastic region of each belt extension is about 50% or more of the dimension in the lateral direction of each belt extension.
(2) A front central elastic region which can be expanded and contracted in the lateral direction is disposed between the first retaining portions of the second fastening means.
(3) The dimension of the first retaining portion in the lateral direction is larger than the dimension of the second retaining portion in the lateral direction.
(4) The chassis has the longitudinally extending middle portion located between the front and rear end regions, and both side edges of the middle portion have a concave shape.
(5) A leg elastic body is disposed so as to be stretchable along a leg opening edge in a portion of the chassis located on the outer side in the lateral direction of the liquid absorbent structure.
(6) The elastic waist belt includes an elastic panel on which the elastic region is disposed, an inelastic retaining tab attached to one side of the elastic panel, and a non-rigidity tab attached to the other side. And the first fastening means includes a third retaining portion located on the skin-facing surface side of the retaining tab and a fourth fastening member located on the non-skin-facing surface side of the retention tab. It consists of parts.
(7) The elastic waist belt has a central portion located between the pair of belt extension portions and connected with the chassis, and inelastic at a portion of the central portion overlapping with the liquid suction structure. The area is located.
(8) The elastic waist belt has a shape that is convex toward the horizontal axis, and crosses the liquid absorbing structure on the rear waist region side of the crotch region and is laterally outside the both side edges And an elastic buttock cover portion extending to the
(9) In the fastener receiving portion constituting the first and second fastening means, a sheet having a visible decorative element is disposed.
(10) The liquid absorbing structure includes a liquid permeable body-side liner and a liquid absorbing layer, and the liquid absorbing layer includes a liquid permeable first sheet and a liquid permeable or liquid impermeable sheet. A second sheet and absorbent polymer particles interposed between the sheets.
(11) The liquid absorbing layer includes a plurality of non-liquid absorbing areas in which the first sheet and the second sheet are joined to each other, and a plurality of the absorbent polymer particles enclosed by the non liquid absorbing area. And a liquid absorption area of
(12) The chassis includes a cover sheet, and the cover sheet has a main body portion on which the liquid absorbing structure is disposed, and both side portions which are positioned on both sides of the main body portion and are bent inward. The two side portions are a front and rear fixed end fixed to the main body, a fixed side located between the front and rear fixed ends, and a leg elastic body extending concavely along the leg opening edge Have.
(13) A bonding area for fixing the fixed side portion and the main body portion is concave outward in the lateral direction, and a non-fixed area is located between the bonding area and the outer edge of the chassis. .

DESCRIPTION OF SYMBOLS 10 open type disposable diaper 11 front waist area 12 back waist area 13 crotch area 14 liquid absorption structure 15

chassis

15c, 15d chassis side edge 16 elastic waist belt 17 first fastening means 18 second fastening means 22 retaining tab 22 Perforated tab 25 Central part 26 of elastic waist belt Belt extension 27 Fastener part (third retaining part)
28 Fastener Receiving Unit (4th Retaining Unit)
40 inelastic region 41 first elastic region 42 second elastic region 43 central inelastic region (inelastic region)
51 chassis front end area 52 chassis rear end area 53 chassis middle part 56 main part 57 both sides 60 front fixed end 61 rear fixed end 63 fixed side 62 leg elastic body 65 liquid absorbing layer 66 body side liner 73 front Central elastic zone 74 Fastener part (1st retaining part)
75 Fastener Receiving Unit (Second Retaining Unit)
80 buttock cover 85 central inelastic area 87 decorative element 88 illustration sheet (sheet)
91 first sheet 92 second sheet 93 liquid absorbing area 94 non liquid absorbing area 95 absorbent polymer particles 98 non-fixed area L dimension of elastic waist belt in lateral direction Q horizontal axis X horizontal direction Y longitudinal direction

Claims

It has a crotch area located between the front waist area, the front waist area, the front waist area, and the front and rear waist areas, the skin facing surface and the non-skin facing surface, the front waist area, the rear waist area, and the horizontal direction parallel to the vertical axis. A chassis having at least a liquid absorbing structure disposed in the crotch region, a front end region located in the front waist region, and a rear end region located in the rear waist region, and the rear end region of the chassis being connected An open type disposable diaper including an elastic waist belt
The first fastening means for connecting the side edges of the elastic waist belt to each other, and the front end area of the chassis on the non-skin opposing surface of the elastic waist belt connected via the first fastening means And a second fastening means for attaching
The elastic waist belt has a pair of belt extension portions extending outward in the lateral direction from both side edges of a rear end region of the chassis, and an elastic region which is stretchable in the lateral direction.
At least one of the pair of belt extensions has a first elastic area extending outward in the lateral direction from the side edge of the liquid absorbent structure, and a second elastic area facing the first elastic area in the lateral direction. A zone and an inelastic zone located between the first and second zones of elasticity,
The second fastening means includes a first retaining portion located on the skin facing surface side of the front end area of the chassis and a second retaining portion located on the non-skin opposing surface side of the inelastic area. Said diaper characterized in that.
The diaper according to claim 1, wherein the dimension in the lateral direction of the elastic region of each belt extension is about 50% or more of the dimension in the lateral direction of each belt extension.
The diaper according to claim 1 or 2, wherein the laterally extensible front central elastic region is disposed between the first retaining portions.
The diaper according to any one of claims 1 to 3, wherein a dimension of the first retaining portion in the lateral direction is larger than a dimension of the second retaining portion in the lateral direction.
The diaper according to any one of claims 1 to 4, wherein the chassis has a longitudinally extending middle portion located between the front and rear end zones, and both side edges of the middle portion have a concave shape.
The leg elastic body is disposed in an expandable manner along the leg opening edge in a portion of the chassis located on the outer side in the lateral direction of the liquid absorbing structure. Diapers described in.
The elastic waist belt has an elastic panel in which the elastic area is disposed, an inelastic retaining tab attached to one side of the elastic panel, and a retaining tab attached to the other side. The first fastening means comprises a third retaining portion located on the skin-facing surface side of the retaining tab and a fourth retaining portion located on the non-skin-facing surface side of the retaining tab The diaper according to any one of the preceding claims.
The elastic waist belt has a central portion located between the pair of belt extension portions and to which the chassis is connected, and an inelastic region is positioned at a portion of the central portion overlapping the liquid absorbing structure. A diaper according to any one of the preceding claims.
The elastic waist belt has a shape that is convex toward the horizontal axis, and on the rear waist region side of the crotch region, the elastic waist belt crosses the liquid absorbing structure and extends laterally outward of the both side edges thereof. The diaper according to any one of claims 1 to 8, having a buttocks cover portion.
The diaper according to any one of claims 1 to 9, wherein a sheet having a visible decorative element is disposed in the fastener receiving portion that constitutes the first and second fastening means.
The liquid-absorbent structure includes a liquid-permeable body-side liner and a liquid-absorbent layer, and the liquid-absorbent layer includes a liquid-permeable first sheet and a liquid-permeable or liquid-permeable second sheet. The diaper according to any one of claims 1 to 10, wherein the absorbent polymer particles are interposed between the sheets.
The liquid absorbing layer includes a non-liquid absorbing area in which the first sheet and the second sheet are joined to each other, and a plurality of absorbents surrounded by the non liquid absorbing area and in which the absorbent polymer particles are enveloped. The diaper according to claim 11, further comprising a liquid area.
The chassis includes a cover sheet, and the cover sheet has a main body portion on which the liquid absorbing structure is disposed, and both side portions which are located on both sides of the main body portion and are bent inward. Each of the side portions has a front and rear fixed end fixed to the main body, a fixed side located between the front and rear fixed ends, and a leg elastic body extending concavely along the leg opening edge. Item 13. The diaper according to any one of items 1 to 12.
The joint area for fixing the fixed side portion and the main body portion is concave outward in the lateral direction, and a non-fixed area is located between the joint area and the outer edge of the chassis. Diapers described in.