JP2001087311A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article excellent not only in leakage preventing properties from side parts but also in productivity. SOLUTION: This absorbent article has an absorbent body 10 substantially extended longitudinally equipped with a surface sheet 2, a leak-proof sheet 3 and an absorber 4 and leg elastic members 70 forming leg gathers along opening edges 7a of leg opening parts 7 are arranged to the leg opening parts 7 and the absorbent body 10 is bonded and fixed to an exterior material 5 having an abnorminal part A and a back part B at the central part in the longitudinal direction of the exterior material 5 over the almost whole in the longitudinal direction of the exterior material 5 and first elastic members 7a are almost linearly arranged to the absorbent body 10 on both left and right sides in the longitudinal direction thereof while the second elastic member 72 curved along the edge parts 50a of leg opening forming parts 50 and the second elastic member 72b curved along the edge parts 50c of the leg opening forming parts 50 are arranged to the leg opening forming parts 50 and the leg elastic members 70 consist of the first elastic members 71 and second elastic members 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article excellent in leak prevention and productivity, and more particularly, a disposable diaper, sanitary article, and the like having an absorbent for holding and holding excrement.
The present invention relates to incontinence articles, in particular, pants-shaped absorbent articles.

[0002]

2. Description of the Related Art In a pants-type absorbent article such as a disposable diaper, in order to prevent leakage from the crotch, an elastic member which is swung and curved and a linear elastic member are used. Various arrangements have been proposed in the past to form leg gathers in the leg openings.

[0003] However, the conventionally proposed absorbent article having a configuration in which a curved elastic member and a linear elastic member are arranged in combination cannot efficiently produce the absorbent article, so that the production is difficult. There was a problem that it was inferior. That is,
It is difficult to fix the elastic member that has been swung and curved unless it is sandwiched between at least two sheets coated with an adhesive, and the flow direction of the web that sandwiches the swung elastic member is difficult. In order to bond the elastic member extended in the direction perpendicular to the direction, it is necessary to separately prepare a supporting member, which has reduced productivity. In particular, when a thread-like elastic member is used, the use of a support member is indispensable. In addition, there was a problem that productivity was reduced. The use of a film as the support member has the advantage that handling by vacuum is easy, but has the drawback that when the film is adhered using a hot melt, the film becomes hard and the feel / feel deteriorates. On the other hand, when non-woven fabric is used, vacuum handling is poor and it is not suitable for high-speed production.

[0004] Accordingly, an object of the present invention is to provide an absorbent article which is excellent in preventing leakage from the side portions and also excellent in productivity.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a substantially vertically absorbent body having a liquid permeable topsheet and a liquid retaining absorber, wherein a pair of leg openings have In a pants-type absorbent article in which leg elastic members forming leg gathers are respectively arranged along opening edges, the absorbent main body includes an exterior body having an abdominal part and a back side, and the exterior body And a first elastic member extending along the longitudinal direction on each of the left and right sides in the longitudinal direction of the absorbent main body, and a first elastic member extending along the longitudinal direction. The central portion in the direction is arranged so as to be extendable and contractable, and the exterior body has a second elastic member curved along the edge of the leg opening forming portion at each of the leg opening forming portions. And the leg elastic member is By providing the absorbent article with the first elastic member made of said second elastic member is obtained by achieving the above object.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described. Disposable diaper 1 as one embodiment of the absorbent article of the present invention, as shown in FIGS.
A substantially vertically long absorbent body 10 having a liquid-permeable topsheet 2, a liquid-impermeable leakproof sheet 3 and a liquid-retaining absorber 4 is provided. The leg elastic members 70 forming leg gathers are respectively arranged along the opening edges 7a.

[0007] The disposable diaper 1 of the present embodiment comprises one side edge A1 of the abdominal part A, one side edge B1 of the dorsal part B, the other side edge A2 of the abdominal part A and the other side edge of the dorsal part B. This is a pants-type disposable diaper in which B2 is joined to form a waist opening 8 and a pair of leg openings 7. Also,
In the waist opening 8, as a waist elastic member 81,
Three string-like rubber materials are arranged.

Thus, in the disposable diaper 1 of the present embodiment, the absorbent body 10 is attached to the outer body 5 having the abdominal part A and the back part B at the center of the outer body 5 in the width direction and the outer body. 5, the first elastic member 71 along the longitudinal direction on each of the left and right sides in the longitudinal direction of the absorbent main body 10, and the central portion in the longitudinal direction is expandable and contractible. In this state, in this embodiment, they are arranged substantially linearly, and the exterior body 5 has curved portions along the edges 50 a of the leg opening forming portions 50, each of the leg opening forming portions 50. A second elastic member 72a and a second elastic member 72b curved along the edge 50c are provided, and the leg elastic member 70 includes a first elastic member 71 and a second elastic member 72.

More specifically, the absorbent main body 10 is provided with an elastic member fixing sheet 9 which has a rectangular shape and is disposed so as to cover the right and left sides of the back surface, the side surface and the front surface of the absorber 4. The first elastic member 71 is fixed with its front surface covered with an elastic member fixing sheet 9. The exterior body 5 is formed of two exterior nonwoven fabrics 51 and 52, and the second elastic member 72 is formed of the two exterior nonwoven fabrics 51 and 52.
52, it is held and fixed.

As shown in FIGS. 2 to 4, the absorber 4 has an hourglass shape with a central portion in the longitudinal direction constricted, and the leak-proof sheet 3 and the topsheet 2 have substantially the same size as the absorber 4. The leakage prevention sheet 3 is disposed so as to cover substantially the entire back surface of the absorber 4.
Are arranged on the surface side of the absorber 4 so as to cover up to the left and right side edges. The elastic member fixing sheet 9 is disposed on both ends in the longitudinal direction of the absorbent main body 10, and is folded along the side edge of the absorber 4. It may be folded back wider than the absorber. As a result, in the central portion in the longitudinal direction of the absorbent main body 10, the absorber 4 is narrowed and recessed, and extends outward from the left and right side edges 4a of the absorber 4 in the width direction. . And since it is comprised in this way, the said 1 elastic member 71 will be between the elastic member fixing sheets or between the top sheet 2 and the elastic member fixing sheet 9 at the longitudinal both ends of the absorptive main body 10. And is fixedly held by the central portion of the absorbent main body 10.
Similarly, it is clamped and fixed. In addition, each member is arranged over substantially the entire longitudinal direction of the absorbent main body. The first elastic members 71 have a string shape and are arranged at predetermined intervals of five each over the entire longitudinal direction of the absorbent main body 10. In this embodiment, the number of the plurality of first elastic members 71 is five on one side, but is preferably 2 to 10 on each side. In addition, the “predetermined interval” in the case where a plurality is provided is preferably 1 to 25 mm. In addition, the width of the portion where the first elastic member is disposed is preferably 5 to 150 mm in consideration of a disposable diaper for adults. In particular, when a plurality of cables are arranged, it is preferable to increase the stress on the free end side and increase the elongation rate so that the rigidity of the base end is not easily affected and the free end can contract most. It is also effective to unevenly distribute rubber on the side.

The exterior body 5 has an hourglass shape with a central portion constricted.
a and a central portion, and a linear portion 50b and an edge portion 50c. The linear portion 50b overlaps the central portion of the left and right side edges 10a of the absorbent main body 10, and in this portion, the side edge of the exterior body and the The side edge of the leg is overlapped with the side edge of the main body to form an opening edge 7 a side edge of the leg opening 7. Although not shown, when there is no linear portion 50b, both sides 10a of the absorbent main body form a part of the leg opening edge 7a, and less material overlaps the gathers 71 on both sides 10a of the main body. Therefore, it is possible to form a soft gather around the leg with a very good texture. Further, the two outer nonwoven fabrics 51 and 52 constituting the outer body 5 are made of a disposable diaper 1.
The first exterior nonwoven fabric 51 is located on the outermost surface of the first exterior nonwoven fabric, and the second exterior nonwoven fabric 52 is laminated on the inner surface side of the first exterior nonwoven fabric 51. The first exterior nonwoven fabric 51 and the second exterior nonwoven fabric 52 are respectively And the side edges of the two are overlapped with each other. As shown in FIGS. 2 and 3, the longitudinal length of the first exterior nonwoven fabric 51 is larger than the longitudinal length of the second exterior nonwoven fabric 52. The first exterior nonwoven fabric 51 is long and extends from the edge 52a of the second exterior nonwoven fabric 52 to the second exterior nonwoven fabric 52.
The outer edge 52a of the exterior nonwoven fabric 52 is folded back toward the absorbent body 10 using the folded line as a folding line, and is folded on the longitudinal end of the absorbent body 10. The left and right side portions of the back side portion B and the abdominal side portion A are each formed only by the exterior body 5, and the joining portions 11 on the left and right sides are respectively provided by the exterior body 5.
It is formed by joining together by heat sealing or the like.

The second elastic member 72 extends from one side edge A1 of the abdominal part A to the other side edge A2 of the abdominal part A.
Along the leg opening edge 50a on one side, the absorber 4 is traversed in the width direction, and the leg opening edge 5 on the other side edge A2 side of the abdomen A is provided.
0a, an abdominal second elastic member 72a arranged along
From one side edge B1 of the back side portion B to the other side edge B2 of the back side portion B, along the leg opening edge 50c on the one side edge B1 side, the absorber 4 is traversed in the width direction thereof, and A rear second elastic member 72b disposed along the leg opening edge 50c on the other side edge B2 side. The abdomen-side second elastic member 72a and the back-side second elastic member 72b are each provided three each. The second elastic members 72a, 72b may intersect at the crotch. As described above, the first and second leg elastic members 7
By disposing the first and second elastic members 71, 72.
And the second elastic member 72 can cooperate with each other, and the elastic member is arranged over the entire circumference of the leg opening 7, so that a leg gather is formed over the entire circumference. I have.

Next, each member used in the disposable diaper according to the present embodiment will be described. The topsheet 2, the leak-proof sheet 3, the absorber 4, the waist elastic member 81, the first and second outer nonwoven fabrics 51 and 52 are used. Can be used without particular limitation for those usually used for this type of absorbent article. Examples of the first elastic member 71 and the second elastic member 72 include block copolymers of polystyrene, polyisoprene or polybutadiene, copolymers of ethylene, natural rubber, urethane, and mixtures / coextrusions thereof. A single-layer woven fabric, a nonwoven fabric formed of an elastic material or an elastic material, a film of an elastic material, or a composite of an elastic material can be used. Further, the elastic member fixing sheet 9 has air permeability,
A non-woven fabric having high water repellency, among which a spun bond / melt blown non-woven fabric and a liquid impermeable sheet obtained by laminating a thin film on a non-woven fabric are preferably used. The elongation rate of the first elastic member is preferably 10 to 200%, and the elongation rate of the second elastic member 72 is 10 to 200%.
It is preferably set to 00%.

The pants-type disposable diaper of the present embodiment can be used in the same manner as a normal disposable diaper. And since the disposable diaper of this embodiment is comprised as mentioned above, in the arrangement | positioning of the linear 1st elastic member 71, it integrates with a highly rigid thing like an absorber, and handles and processes. Therefore, it is hardly affected by the shrinkage stress of the first elastic member, there is no place to be a load in the process, the high-speed productivity is excellent, and the gathers are formed all around the leg opening 7. It is excellent in preventing leakage from around the legs. Also, the first elastic member 71
Is integrated with the absorbent main body 10, so that it can be produced smoothly without particularly considering the influence of the stretching stress in the processing step. High-speed production can be performed by integrally processing not only the absorber but also a high-rigid nonwoven fabric or a foam.

The disposable diaper 1 of the present embodiment can be obtained by manufacturing a disposable diaper having the above-mentioned structure using a conventional method for manufacturing a disposable diaper without any particular limitation. It is preferable to manufacture according to the following manufacturing method. That is, in the method of manufacturing a diaper having the above-described configuration, when the substantially vertically absorbent body 10 including the topsheet 2, the leak-proof sheet 3 and the absorber 4 is produced, the longitudinal direction of the absorber 4 An absorbent body forming step of forming the absorbent body 10 by linearly disposing the first elastic member 71 on both sides, and holding the second elastic member 72 between the two outer nonwoven fabrics 51 and 52 in a predetermined shape. Having an exterior body forming step of forming the exterior body 5 on which the second elastic member 72 is arranged, and an integrating step of integrating the exterior body 5 and the absorbent main body 10 to create an absorbent article. It can be manufactured by performing a method of manufacturing a diaper as an article. Steps other than these steps can be performed in the same manner as in a conventional disposable diaper.

More specifically, in the absorbent body forming step, the absorbent body 4 is placed on the leak-proof sheet 3, and the surface and side surfaces of the placed absorbent body 4 are covered with the topsheet 2. An elastic member fixing sheet 9 is arranged along the main body, and five first elastic members 71 are arranged at predetermined intervals in the vicinity of both right and left sides of the absorber 4, and finally all the first elastic members 71 are arranged. This can be performed by folding back the elastic member fixing sheet 9 to the surface sheet 2 side of the absorbent main body 10 so that 71 is covered. Where the order of these steps can be changed, the steps can be changed.

In the step of preparing the outer package, the abdominal and back second elastic members 72a, 72b are provided on the first outer nonwoven fabric 51 located at the outermost position of the diaper so as to have the above-mentioned arrangement.
And then bonding the second exterior nonwoven fabric 52 to the first exterior nonwoven fabric 51 to form an exterior body in which the first and second exterior nonwoven fabrics 51 and 52 sandwich the second elastic member 72. Performed by The bonding of the second elastic member 72 is generally performed by a hot melt adhesive applied to the first exterior nonwoven fabric and / or the second exterior nonwoven fabric and / or a hot melt adhesive applied to the second elastic member 72. As a hot melt adhesive coating device, a device generally used conventionally can be used, and a contact type coater such as a slot coater, a gravure coater, a screen coater, a spiral spray, a curtain spray, etc. Examples of the spray nozzle include a spray nozzle and a slit nozzle for directly applying a hot melt adhesive to an elastic cord.

Further, the integrating step includes the steps of:
The absorbent main body 10 is placed on the exterior body 5 such that the side edge in the longitudinal direction is along the linear portion at the center in the longitudinal direction of the exterior body 5 and over substantially the entire longitudinal direction of the exterior body 5. Are bonded together, and the extended portion of the first exterior nonwoven fabric 51 is folded toward the surface sheet 2 to form the second exterior nonwoven fabric 5.
2 and the topsheet 2 of the absorbent body 10
It can be performed by bonding to the side.

The disposable diaper of the present invention can be variously modified without being limited to the above-described embodiment, and is applicable to, for example, sanitary napkins and incontinence pads in addition to disposable diapers. In addition, the absorbent body may include ordinary three-dimensional gathers. Further, the absorber may be rectangular. A liquid-impermeable sheet may be further laminated on the exterior nonwoven fabric. In this case, the leak-proof sheet of the absorbent main body can be omitted, and a barrier cuff can be provided on the absorbent main body. The barrier cuffs may be double or triple. The leak-proof sheet 3 and the topsheet 2 may be rectangular. The elastic member fixing sheet may be folded wider than the absorber without folding along the side edge of the absorber. In addition, known three-dimensional guards may be provided along the leg openings on both left and right sides in the longitudinal direction, or may be provided along the waist openings on both ends in the longitudinal direction. In addition, a known waist circumference elastic member may be arranged around the waist to form a waist circumference gather that is substantially continuous with the waist.

[0020]

As described above, the absorbent article of the present invention is excellent in preventing leakage from the side and also in productivity.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a disposable diaper as an absorbent article according to the present invention.

FIG. 2 is a developed plan view showing a state where the disposable diaper shown in FIG. 1 is developed.

FIG. 3 is an exploded perspective view showing a state in which the diaper in the deployed state shown in FIG. 2 is further disassembled.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a sectional view taken along line YY of FIG. 3;

[Description of Signs] 1 Disposable diaper 10 Absorbent main body 11 Joint 2 Top sheet 3 Leak-proof sheet 4 Absorber 5 Outer body 50 Leg opening forming part 51 First outer nonwoven fabric 52 Second outer nonwoven fabric 7 Leg opening 70 Leg Elastic member 71 First elastic member 72 Second elastic member 72a Abdominal second elastic member 72b Back second elastic member 8 Waist opening 9 Elastic member fixing sheet A Abdominal side B Back side

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61F 5/44 13/72 (72) Inventor Atsushi Murai 2606 Kabane-cho, Akabane, Haga-gun, Tochigi Pref. In-house (72) Inventor Jun Sasaki 2606 Kabane-cho, Akaga-cho, Haga-gun, Tochigi Pref. In the research center of Kao Corporation (72) Inventor Megumi Kondo 2606, Akabane-cho, Kaiga-cho, Haga-gun, Tochigi pref. BD12 BD13 BD14 BD17 BF07 4C098 AA09 CC10 CC12 CC14 CC28 CE05 DD10

Claims (5)

[Claims] 1. A substantially vertically absorbent body having a liquid-permeable topsheet and a liquid-retentive absorbent body, and a pair of leg openings, each leg extending along an opening edge. In a pants-type absorbent article in which leg elastic members forming gathers are arranged, the absorbent main body is provided on an exterior body having an abdominal part and a back side part, at the center in the width direction of the exterior body and the exterior body. The first elastic member along the longitudinal direction is provided on each of the left and right sides in the longitudinal direction of the absorbent body, and the central portion in the longitudinal direction is expandable and contractible over substantially the entire longitudinal direction of the body. A second elastic member curved along an edge of the leg opening forming portion is disposed at each of the leg opening forming portions on the exterior body, and the leg elasticity is provided. The member includes the first elastic member and the second elastic member. Absorbent article comprising a sexual member. 2. The absorbent body according to claim 1, wherein the absorbent body has a rectangular shape and has elastic member fixing sheets disposed on both left and right sides thereof, and the first elastic member has a front surface on which the elastic member fixing sheet is formed. The absorbent article according to claim 1, wherein the absorbent article is covered and fixed. 3. The absorber main body further includes a liquid-impermeable leakproof sheet, the exterior body is formed of two exterior nonwoven fabrics of the same shape, and the second elastic member is 2
The absorbent article according to claim 1, wherein the absorbent article is held and fixed by a plurality of the exterior nonwoven fabrics. 4. The second elastic member passes from one side edge of the abdominal portion to the other side edge of the abdominal portion through a leg opening on one side edge, crosses the absorber in the width direction thereof, A belly-side second elastic member arranged to pass through the leg opening on the other side edge of the abdomen, and a leg opening on one side edge from one side edge of the back side to the other side edge of the back side And a back side second elastic member arranged so as to pass through the portion, cross the absorber in the width direction thereof, and pass through the leg opening on the other side edge side of the back side. The absorbent article according to any one of the above. 5. The absorbent article according to claim 1, wherein both side portions of the absorbent main body along the first elastic member form a part of a pair of leg openings.