JP2000271168A - Absorptive article not causing side leakage and excellent in fit feeling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the side leakage of excreta in an absorptive article, and improve the wear feeling at the same time. SOLUTION: In the absorptive article provided with a long body having a long absorptive body between a liquid-permeable top sheet and a liquid- impermeable back sheet and solid gathers 7a, 7b in which a base end edge is fixed along the longitudinal direction on both sides in the longitudinal direction of the liquid-permeable top sheet surface, and a long elastic member is fitted in the longitudinal direction in an expanded condition, and both end parts are fixed to the liquid-permeable top sheet surface, long elastic members 15a, 15b are fitted to tip edges of the solid gathers non-straight in the longitudinal direction in an expanded condition, and in addition, intermediate long elastic members 16a, 16b are fixed between the tip edge and the base end edge straight in the longitudinal direction in an expanded condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable absorbent article, and more particularly to a disposable absorbent article capable of preventing side leakage and having a good feeling of wearing on a body.

[0002]

2. Description of the Related Art A disposable diaper, which is an example of a disposable absorbent article, is basically composed of a liquid-impermeable back sheet (1) and a liquid-permeable top sheet (2), as shown in FIGS. A long body having a long absorber (3) interposed therebetween and having a narrowed central portion in the longitudinal direction in a planar shape is provided. Further, one side of a mechanical fastener such as a fastening tape (4a) to (4d) using an adhesive or a Velcro fastener is attached to the outer surface of the liquid-impervious back sheet (1) which is on the back side when worn. A fastening tape provided with a member is provided, and left and right three-dimensional gathers (7a) (7a) (7a) which stand up along the longitudinal direction when worn on both longitudinal sides of the long body.
b) is provided.

The three-dimensional gathers (7a) and (7b) are made of, for example, a water-repellent non-woven fabric such as polyethylene, polypropylene, PET or the like having one side edge joined to the longitudinal side edges of the inner surface of the back sheet (1). The base sheet (12a) (12b), which extends the side sheets (10a) (10b) that become inward and along the longitudinal side edges
By continuously joining the top sheet (2) to the top sheet (2) by means such as heat sealing, a contraction force is applied in the longitudinal direction to the further extended inner side sheet portion and the leading edges (8a) (8b). The solid gather is formed by the fixed long elastic member (11), and the three-dimensional gathers have both ends (a1) to (a4) (hatched portions in the figure) in the longitudinal direction on the top sheet (2) surface. Due to the bonding, the disposable diaper appears upright when spread when used.

In addition, a leg gather along the longitudinal direction for forming leg gathers (5a) (5b) is formed at a joint portion of the central portion of the back sheet (1) with the side sheets (10a) (10b). The fastening tapes (4a) to (4d) engage with the outer surface of the liquid-impermeable back sheet (1) which is on the abdominal side when the elastic member (6) is sandwiched and further worn, not shown. A sheet made of polypropylene or the other engaging sheet of a mechanical fastener is fixed as a frontal tape.

[0005]

The purpose of the three-dimensional gather in such a disposable diaper is to prevent excrement from leaking sideways, and it is necessary to stand up when worn and bring it into close contact with the skin. In order to bring the solid gathers into good contact with the skin, it is necessary to increase the standing force of the solid gathers by increasing the contraction force of the long elastic member of the solid gathers, and as a result, to make strong contact with the skin of the crotch be able to. However, when the contraction force of the long elastic member is increased in this way, the irritation to the skin is also increased, which is a cause of impairing a comfortable wearing feeling. Conventionally, a disposable diaper in which a plurality of the same long elastic members are juxtaposed at the leading edge of the three-dimensional gather at a small interval is marketed, but there is a limit to achieving both the erectness and the feeling of wearing of the three-dimensional gather. was there. Further, in a disposable diaper using a wide and long elastic member, there is a disadvantage that air permeability is impaired.

[0006]

Accordingly, as a result of an examination in view of such a problem, the present invention has developed an absorbent article such as a disposable diaper which is less likely to leak laterally and has an excellent wearing feeling when worn.

That is, the absorbent article of the present invention comprises a long main body in which a long absorber is sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a longitudinal body of the liquid-permeable top sheet. Three-dimensional gathers having base edges fixed along both sides in the longitudinal direction along the longitudinal direction, and a long elastic member fixed in the longitudinal direction in an extended state and both ends fixed to the liquid-permeable topsheet surface. In the absorbent article, a long elastic member is fixed to the distal end edge of the three-dimensional gather in a non-linear manner in a longitudinal direction and in an extended state, and further, an intermediate portion long elastic member is provided between the distal end edge and the base end edge. The member is fixed in a stretched state in a linear shape in the longitudinal direction, and the contraction force between the fixed end edge long elastic member and the fixed intermediate long elastic member is fixed at this time. It is good to provide a difference between

Further, another absorbent article of the present invention comprises a long main body having a long absorbent body sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a surface of the liquid-permeable top sheet. Three-dimensional gathers whose base edges are fixed to both sides in the longitudinal direction along the longitudinal direction, and in which the long elastic member is fixed in a stretched state in the longitudinal direction and both ends are fixed to the liquid-permeable top sheet surface. In the absorbent article provided with, a long elastic member is fixed to the distal end edge of the three-dimensional gather in a non-linear manner in a longitudinal direction and in an extended state, and furthermore, an intermediate portion length is provided between the distal end edge and the proximal end edge. It is characterized in that a length elastic member is not provided.

According to the present invention, in any of the above absorbent articles, a plurality of long elastic members having different contraction forces and a plurality of long elastic members having the same contraction force are used as the distal edge long elastic members. Or, a plurality of long elastic members including a part of the same long elastic member having the same contraction force are provided, or as a plurality of distal edge long elastic members, the contraction forces are the same or different from each other, on the proximal end side. It is effective to provide a lower convex long elastic member that is convexly curved and an upper convex long elastic member that is concavely curved on the base edge side.

Further, according to the present invention, in any of the above-mentioned absorbent articles, the long elastic member at the distal end is fixed in a shape convexly curved toward the proximal end, or the long elastic member at the distal end is attached to the proximal end. It is effective to fix the elastic member in a concavely curved shape or to fix the long elastic member at the distal end edge in a wavy shape.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the absorber and the long elastic member for leg gathers are omitted for easy understanding.

(Embodiment 1) As shown in FIG. 3, as a long elastic member at the leading edge of the three-dimensional gathers (7a) and (7b) of the disposable diaper, it is concavely curved toward the proximal edges (12a) and (12b). The upper convex elongated elastic members (15a) and (15b) of the shape are respectively fixed in an extended state in the longitudinal direction, and at the same time, the upper convex elongated elastic members (15a) (15
b) and the base edge (12a) (12b) between the intermediate long elastic member (1
6a) and (16b) were fixed in a stretched state linearly in the longitudinal direction.

(Embodiment 2) As shown in FIG. 4, as a long elastic member of the leading edge constituting the three-dimensional gathers (7a) and (7b) of the paper diaper, a convex curve is formed on the proximal edges (12a) and (12b). The lower convex long elastic members (17a) (17a) (17a) (17a)
b) and the base edge (12a) (12b) between the intermediate long elastic member (1
6a) and (16b) were fixed in a stretched state linearly in the longitudinal direction.

(Embodiment 3) As shown in FIG. 5, as long elastic members at the leading edge of the three-dimensional gathers (7a) and (7b) of the disposable diaper, corrugated elongate elastic members (18a) and (18) are respectively provided in the longitudinal direction.
b) is fixed in an elongated state in the longitudinal direction, and at the same time, the intermediate elongated elastic members (16a) (16b) are located between the corrugated elongated elastic members (18a) (18b) and the base edges (12a) (12b). ) Were fixed in a stretched state linearly in the longitudinal direction.

In these embodiments, the non-linear long end elastic member and the linear intermediate long elastic member are both made of urethane rubber and made of thread rubber of product number 840d, but are different from each other. Thread rubbers having different properties and states such as types, different thicknesses, and different stretching magnifications may be used.

The disposable diapers according to the present invention as described above realize both improved standing of the three-dimensional gathers and improved feeling of wearing. In other words, it is effective to prevent lateral leakage since the stimulation to the skin can be reduced and the contraction force can be set higher without impairing the air permeability of the three-dimensional gather portion. Further, by adjusting the shape and size of the non-linear shape of the long edge elastic member to be fixed and the contraction force, it is possible to design a three-dimensional gather that balances both effects of preventing lateral leakage and improving a feeling of wearing. . Further, in the above example, the joining surfaces of both ends (a1 to a4 in FIG. 1) of the three-dimensional gather with the liquid-permeable top sheet (2) face are respectively opposed to each other of the two-dimensional gathers (7a) and (7b). The outer surface, which is the inner surface but is the opposite surface in the present invention, may be the joint surface with the top sheet (2) surface.

Further, when a plurality of long elastic members are attached as in the present invention, the plurality of long elastic members follow the movement of the wearer flexibly, so that the three-dimensional gather becomes difficult to bend and the horizontal gathering becomes difficult. Leakage can be effectively prevented. By using a plurality of long elastic members, a large number of folds are formed between the distal edge long elastic member (19) and the intermediate long elastic member (20) as shown in FIG. The cushioning property of is improved. In particular, when a difference is provided in the contraction force between the distal edge long elastic member and the intermediate portion long elastic member, the standing state of the three-dimensional gathers at the time of wearing is inwardly concavely curved as shown in FIG. The storage of excrement is also improved. In particular, when a long elastic member having a downward convex shape as shown in FIG. 4 is used, the elastic member is not provided at the front end edge of the three-dimensional gather in the longitudinal center portion, so that the contact with the skin is soft and the wearing feeling is further improved. Becomes

[0018]

As described above, according to the present invention, it is possible to effectively prevent lateral leakage of excrement, and at the same time, to improve the feeling of wearing an absorbent article such as a disposable diaper. The feeling of use for was improved.

[Brief description of the drawings]

1A and 1B show a conventional disposable diaper, wherein FIG. 1A is a plan view and FIG. 1B is a sectional view taken along line AA ′ of FIG.

FIG. 2 is a perspective view showing a conventional paper diaper.

FIG. 3 is a plan view showing an example of a disposable diaper according to the present invention.

FIG. 4 is a plan view showing another example.

FIG. 5 is a plan view showing another example.

FIG. 6 is a perspective view of an essential part for explaining the effect of the three-dimensional gather in the present invention.

FIG. 7 is a sectional view of an essential part of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid-impermeable backsheet 2 Liquid-permeable topsheet 3 Long absorber 4a-4d Fastening tape 5a, 5b Leg gather 6 Elastic member for leg gather 7a, 7b Solid gather 8a, 8b Front edge 10a, 10b Side sheet 11 Long elastic member 12a, 12b Base edge 15a, 15b Upper convex long elastic member 16a, 16b Middle long elastic member 17a, 17b Lower convex long elastic member 18a, 18b Corrugated long elastic member 19 Tip edge length Long strong elastic member 20 Middle long elastic member

Continuation of the front page (72) Inventor Hiroaki Matsubara 6-22-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo F-term within Crecia Corporation (reference) 3B029 BD12 BD13 BD14 4C098 AA09 CC10 CE07

Claims (8)

[Claims] 1. A long main body having a long absorbent body sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a longitudinal direction on both sides of the liquid-permeable top sheet surface in the longitudinal direction. A three-dimensional gather whose base edge is fixed along, and a long elastic member is fixed in an elongated state in a longitudinal direction and both ends are fixed to the liquid-permeable top sheet surface. A long elastic member is fixed to the distal end edge of the three-dimensional gather in a non-linear shape in the longitudinal direction and stretched, and an intermediate elongated elastic member is linearly formed in the longitudinal direction between the distal edge and the base edge. An absorptive article which is hard to leak laterally and has a good wearing feeling, which is fixed in an extended state. 2. The absorbent article according to claim 1, wherein there is a difference in contraction force between the fixed end edge long elastic member and the fixed intermediate portion long elastic member. . 3. A long body in which a long absorber is sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a longitudinal direction on both sides of the liquid-permeable top sheet surface in the longitudinal direction. A three-dimensional gather whose base edge is fixed along, and a long elastic member is fixed in an elongated state in a longitudinal direction and both ends are fixed to the liquid-permeable top sheet surface. A long elastic member is fixed to the distal edge of the three-dimensional gather in a non-linear and elongated state in the longitudinal direction, and further, no intermediate elongated elastic member is provided between the distal edge and the base edge. Absorbent article with good wearing feeling with less side leakage. 4. A plurality of long elastic members having different contraction forces, a plurality of long elastic members having the same contraction force, or a long elastic member having the same contraction force are used as the front edge long elastic members. A plurality of long elastic members including a portion are provided.
4. The absorbent article according to any one of items 3 above, which is less likely to leak laterally and has a good fit. 5. A plurality of long distal end edge elastic members having the same or different contraction forces, and a lower convex long elastic member convexly curved toward the base edge side and an upper convex strip concavely curved toward the base end side. 5. The absorbent article according to claim 4, wherein said absorbent article has a long elastic member and does not easily leak laterally and has a good fit. 6. The absorbent article according to any one of claims 1 to 3, wherein the long elastic member at the distal end edge is fixed in a convexly curved shape toward the proximal end side. 7. The absorbent article according to any one of claims 1 to 3, wherein the long elastic member at the distal end edge is fixed to the base edge side in a concavely curved shape. 8. The absorbent article according to any one of claims 1 to 3, wherein the long elastic member at the distal end edge is fixed in a wavy shape so that it does not easily leak laterally and has a good fit.