JP3515910B2 - Disposable wearing articles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable articles such as disposable diapers, incontinence pants, and training pants.

[0002]

2. Description of the Related Art A disposable diaper cover disclosed in Japanese Patent Laid-Open No. 58-54005 has a pair of notches formed on both sides of a cover body and extending inward in the width direction so as to be spaced apart from each other in the longitudinal direction of a crotch region. Between both edges, both side edge portions are folded back to the inside of the cover body, and the vicinity of both end edge portions of the folded portion is joined to the inner surface of the cover body. A pocket for inserting and removing the side edge portion of the diaper is formed in the crotch region of the inner surface of the cover body.

In the disposable diaper disclosed in Japanese Patent Application Laid-Open No. 62-250201, the lateral edges of the liquid-absorbent core interposed between the liquid-permeable inner sheet and the liquid-impermeable outer sheet are extended outward in the width direction. An elastic member is attached to the protruding side flap. Inside the elastic member, the second flap that branches from the upper surface of the side flap lays down toward the inside of the diaper, and both longitudinal ends of the second flap are joined to the inner surface of the diaper. The free edge of the second flap has a second
Elastic member is attached, and with the second elastic member, the second flap can rise from its branching edge. The side flaps are in pressure contact with the thighs of the wearer, and the second flap is capable of abutting the free edge of the central portion against the thigh roots of the wearer.

[0004]

Problems to be Solved by the Invention JP-A-58-5400
The size of the pocket of the disposable diaper disclosed in Japanese Patent No. 5 is gradually reduced from the opening of the pocket toward the inside, and it is difficult to prevent the excrement from flowing into the pocket.

In the disposable diaper disclosed in Japanese Unexamined Patent Publication No. 62-250201, it is troublesome to prepare a separate member as the second flap and to join it to the upper surface of the side flap of the diaper body.

An object of the present invention is to form a pocket in a disposable wearing article capable of preventing the inflow of excrement from flowing out by a relatively simple means.

[0007]

In order to solve the above-mentioned problems, the present invention is based on the premise that a liquid-permeable top sheet, a liquid-impermeable back sheet, and a sheet interposed between these sheets are provided. It is composed of a liquid-absorbent core, has front and rear waist regions and a crotch region, and a longitudinal direction and a width direction, and extends from each side edge of the core in at least the crotch region to the outside in the width direction, and the longitudinal direction. It is a disposable wearing article having a side flap to which an elastic stretchable member is attached in a direction.

In such a premise, the first feature of the present invention is that the side flap is bent toward the inside of the article to provide a first portion and a second portion located above the first portion. The first portion and the second portion are defined to be opposed to each other in the longitudinal direction, and are joined to each other at a pair of seal portions that are inclined so that the opposing distance gradually increases from the inside to the outside of the article. The first and second portions are attached with the first and second elastic members extending in the longitudinal direction as the elastic members in an extended state.

In such a premise, a second feature of the present invention is that the side flaps are bent inward of the article to form a first portion and a second portion located above the first portion. A pair of seals that are defined and in which the first portion and the second portion in the crotch region are opposed to and separated from each other in the longitudinal direction, and are inclined so that the opposing distance gradually increases from the inside to the outside of the article. And the elastic member is attached in an extended state to at least one of the first portion and the second portion.

In such a premise, the third feature of the present invention is that the side flaps are bent inside the article and further bent outside the article to provide a first portion and the first portion. A second portion located above the portion and a third portion located above the second portion, wherein the first portion and the second portion are spaced apart from each other in the longitudinal direction, The first and second seal portions are joined to each other at a pair of first seal portions that are inclined so that the opposing distance gradually increases from the inside to the outside of the article, and the second portion and the third portion are located between the first seal portions. A first elastic member extending in the longitudinal direction as the elastic member is attached to the first portion in a stretched state, the first elastic member being joined to each other in the second seal portion, and at least one of the second portion and the third portion. The elastic In the second elastic members extending in the longitudinal direction as wood are attached in a stretched state.

As an example of the embodiment of the present invention having the first feature, when the elastic members are released from their expanded states and the elastic members contract in the first portion and the second portion, The contracting dimension of the second elastic member located in the second portion is larger than that of the first elastic member located in the first portion.

As an example of the embodiment of the present invention having the third feature, the elastic members are released from their expanded state and the elastic members contract in the first portion and the second and third portions. At times, the contracting dimension of the second elastic member located in at least one of the second portion and the third portion is larger than that of the first elastic member located in the first portion.

As an example of an embodiment of the present invention having the first to third characteristics, the side flaps extend from the respective side edges of the core outward in the width direction, and the top sheet and the back sheet. Of at least one of the above.

As another example of the embodiment of the present invention having the first to third characteristics, the side flaps are joined to the upper surface of the top sheet in the vicinity of both side edges of the core to form the side edges. It is formed by a liquid resistant sheet extending outward from each of the width direction, and the back sheet which is overlapped with the liquid resistant sheet and joined to each other.

As another example of the embodiment of the present invention having the first to third characteristics, in the crotch region, the core is opposed to and separated from the side edge in the longitudinal direction from the inside to the outside of the article. It has a substantially hourglass shape in which a concave cutout portion is formed by a pair of end edges that are inclined so as to gradually increase the facing distance toward each other, and the seal portion is parallel to the end edge.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Details of a disposable wearing article according to the present invention will be described with reference to the accompanying drawings, taking a disposable diaper as an example.

1 and 2 are a partially cutaway plan view of the disposable diaper 1 and a plan view of the diaper 1 showing a state before the side flaps 5 are bent. In FIG. 1 and FIG. The side flaps 5 extending outward in the width direction from the respective side edges 4a are bent in the direction indicated by the arrow on the first folding curve 30. The disposable diaper 1 is interposed between the liquid-permeable top sheet 2, the liquid-impermeable back sheet 3, the top sheet 2 and the back sheet 3, and is bonded to the inner surface of at least one of these sheets 2 and 3. A side flap 5 that is formed of a liquid-absorbent core 4 that is bent toward the inside of the diaper 1 at the first bent portion 30, a front waist region 20 in the longitudinal direction that intersects the width direction, and a rear waist region. It has a region 22 and a crotch region 21 located between the front and rear waist regions 20, 22.

The core 4 has a side edge 4a in the crotch region 21.
And a pair of end edges 4b that are spaced apart from each other in the longitudinal direction of the core 4 and that have a gradually increasing facing distance from the inside to the outside of the diaper 1 have a substantially hourglass shape in which a recess is formed.

The side flaps 5 are formed on both side edges 4a of the core 4.
The base sheet 5d is formed by the top sheet 2 and the back sheet 3 extending outward in the width direction from the respective sides, and has a base side portion 5d along the side edge 4a of the core 4 and an opposite side portion 5e parallel to the base side portion 5d. A first folding curve 30 extends in the longitudinal direction of the diaper 1 between the base side portion 5d and the facing side portion 5e of the side flap 5.

FIG. 3 is a view showing a section taken along line AA of FIG. The side flap 5 has a base portion 5d in the width direction.
The first portion 5a extending outward in the width direction of the diaper 1 between the first folding curve 30 and the first folding curve 30, and is located above the first portion 5a.
It is defined by a second portion 5b extending inward in the width direction of the diaper 1 between the folding curve 30 and the opposite side portion 5e.

The first portion 5a and the second portion 5b of the side flap 5 are opposed to and separated from each other with a center line X bisecting the longitudinal direction of the diaper 1 therebetween, and extend in a direction intersecting the longitudinal direction of the diaper 1. The first seal portions 6a are joined to each other. The first seal portion 6a is inclined from the inner side to the outer side of the diaper 1 so as to gradually move away from the center line X, and the core 4
Extends in parallel with the edge 4b.

The first portion 5a of the side flap 5 is provided with three elastic stretchable members 8 extending in the longitudinal direction of the diaper 1.
It is interposed between the top sheet 2 and the back sheet 3, and is joined in an extended state to the inner surface of at least one of the sheets 2 and 3. Opposing side portion 5e of the side flap 5
, Two elastic stretchable members 7 extending in the longitudinal direction of the diaper 1 are interposed between the top sheet 2 and the back sheet 3 and are stretched on the inner surface of at least one of the sheets 2 and 3. It is joined. These elastic members 7, 8
Extend between the first seal portions 6a.

The elastic members 7, 8 are released from their expanded state, and the elastic members 7 located in the second portion 5b contract when the elastic members 7, 8 contract in the first portion 5a and the second portion 5b. The dimension is larger than that of the elastic member 8 located in the first portion 5a. In order to make the contracting dimension of the elastic member 7 larger than that of the elastic member 8, the elastic member 7 may be joined to the second portion 5b in a state of being higher expanded than the elastic member 8.

The front and rear waist regions 20, 22 are provided with film-like elastic stretchable members 9, 10 extending in the width direction of the diaper 1 along the edges of the front and rear waist regions 20, 22, as the top sheet 2. It is interposed between the back sheet 3 and the inner surface of at least one of the sheets 2 and 3 in an extended state. The base end portions of a pair of tape fasteners 11 extending inward in the width direction of the diaper 1 are interposed between the topsheet 2 and the backsheet 3 at both side edges of the rear waistline region 22. , 3 are non-peelablely joined. To the free end of the tape fastener 11, one of the mechanical fastener 12 which is a hook member or a loop member is attached.

As shown by the phantom line in FIG. 3, the side flaps 5 are arranged such that when the longitudinal direction of the diaper 1 is curved downward, the second portion 5b of the side flaps 5 is placed between the first seal portions 6a. Shows a tendency to stand up due to the contracting force of the elastic member 7, and between the first seal portions 6a, the first portion 5a and the second portion 5b of the side flap 5 have the diaper 1
A pocket 25 is formed that opens toward the inside of the. Second
Since the elastic member 7 located in the portion 5b contracts more than the elastic member 8 located in the first portion 5a, the first portion 5
Even if the elastic member 8 of a contracts, the elastic member 7 of the second portion 5b
The tension state is maintained, and the standing second portion 5b does not fall down.

FIG. 4 is a view showing a cut surface of the side flap 5 having a structure different from that of FIG. The side flap 5 is
A liquid-resistant sheet 9 that is joined to the upper surface of the top sheet 2 in the vicinity of each side edge 4a of the core 4 and extends outward from the side edges 4a of the core 4 in the width direction, and from the side edges 4a of the core 4 to the width direction outside. It is formed by the extending back sheet 3. The side flaps 5 are bent inward of the diaper 1 along the first folding curve. The excrement exuded to the side edge of the top sheet 2 does not leak out from the side flaps 5 because the liquid resistant sheet 9 serves as a barrier.

FIG. 5 is a perspective view of the diaper 1, showing a state in which the tape fastener 11 in the rear waist region 22 is engaged with the front waist region 20. In the front waist region 20, the target tape 1 made of the other member of the mechanical fasteners is used.
3 is attached. The diaper 1 has a front and rear waist region 20,
When the side flaps 5 located on both side edges of 22 are expanded and the tape fastener 11 is engaged with the target tape 13, a waist opening 25 and a pair of leg openings 26 are formed. In the crotch region 21 of the diaper 1, the second portion 5b of the side flap 5 extends toward the inside of the diaper 1. When the elastic members 7, 8, 9, 10 contract,
A gather is formed between the waist opening 25 and the leg opening 26.

6 and 7 are a partially cutaway plan view of a disposable diaper 1 of a mode different from that of FIG. 1 and a view showing a section taken along line BB in FIG. Between the base side part 5d and the opposing side part 5e of the side flap 5, the first folding curve 30 extends in the longitudinal direction of the diaper 1 toward the base side part 5d, and the longitudinal direction of the diaper 1 toward the opposing side part 5e. The second curve extends to. The side flap 5 is bent to the inside of the diaper 1 by the first folding curve 30 and is bent to the outside of the diaper 1 by the second folding curve 31.

The side flaps 5 are located above the first portion 5a and a first portion 5a extending outward in the width direction of the diaper 1 between the base side portion 5d and the first folding curve 30 in the width direction. A diaper 1 between the first folding curve 30 and the second folding curve 31
A second portion 5b extending inward in the width direction and a third portion 5c located above the second portion 5b and extending outward in the width direction of the diaper 1 between the second folding curve 31 and the opposite side portion 5e. Well defined.

The first portion 5a and the second portion 5b of the side flap 5 are opposed to each other with a center line X bisecting the longitudinal direction of the diaper 1 interposed therebetween and extend in a direction intersecting the longitudinal direction of the diaper 1. The first seal portions 6a are joined to each other. The first seal portion 6a extends from the inside of the diaper 1 toward the outside so as to be gradually away from the center line X. Second part 5b and third part 5c of the side flap 5
Are joined to each other at the second seal portion 6b extending in the longitudinal direction of the diaper 1 between the first seal portions 6a along the first fold curve 30.

The first portion 5a of the side flap 5 has three elastic members 8 extending in the longitudinal direction of the side flap 5.
Is interposed between the top sheet 2 and the back sheet 3, and is joined to the inner surface of at least one of the sheets 2 and 3 in an extended state. Two elastic members 7 extending in the longitudinal direction of the side flaps 5 are provided in the vicinity of the second folding curve.
Is interposed between the second portion 5b and the third portion 5c, and is joined to the outer surface of the back sheet 3 in a stretched state. These elastic members 7 and 8 extend between the first seal portions 6a. The elastic member 7 may be interposed between the top sheet 2 and the back sheet 3 and joined to the inner surface of at least one of the sheets 2 and 3 in an extended state. Second part 5b
The elastic member 7 located between the first portion 5a and the third portion 5c has a larger contracting dimension than the elastic member 8 located in the first portion 5a.

The side flap 5 has a second portion 5b and a third portion 5c of the side flap 5 when the longitudinal direction of the diaper 1 is curved downward, as shown in phantom in FIG.
Indicates a tendency to stand up by the contracting force of the elastic member 7 between the first seal portions 6a, and between the first seal portions 6a, the first portion 5a and the second portion 5 of the side flap 5 are
b forms a pocket 25 that opens toward the inside of the diaper 1. The side flap 5 may be formed by the liquid resistant sheet 9 and the back sheet 3 as in FIG. 3.

FIG. 8 is a view showing a section taken along the line CC of FIG. First portion 5a and second portion 5b of the side flap 5
And are joined at the first seal portion 6a, and
The portion 5b and the third portion 5c are not joined to each other at the first seal portion 6a. In the first seal portion 6a, the rigidity of the joint portion is higher than that of the other portions, and gives a firm feeling when coming into contact with the body. The first seal portion 6a and the third portion 5c
Therefore, the first seal portion 6a does not directly contact the body.

The diaper 1 can prevent the lateral leakage of excrement by forming the pocket 25 without joining another member to the upper surface of the side flap 5. Front and back waist area 2
At both side edges of 0 and 22, by expanding the bent side flaps 5, it is possible to form wings extending outward in the width direction, so that the crotch region 21 can be cut without cutting. It is possible to form a recessed portion in the diaper 1.

The diaper 1 shown in FIG. 6 has a side flap 5
Since the dimension in the width direction when the is folded can be made smaller than that of the diaper 1 of FIG. 1, even if the side flaps 5 fall inside the diaper 1, the top sheet 2 is not widely covered. , Does not hinder the absorbability of the core 4.

As the top sheet 2, a hydrophobic non-woven fabric treated with a hydrophilizing agent or a hydrophilic non-woven fabric formed of fibers kneaded with a hydrophilizing agent is used. Instead of these non-woven fabrics, a thermoplastic synthetic resin film having openings may be used.

As the back sheet 3 and the liquid resistant sheet 9, a synthetic resin film or a laminated sheet of a synthetic resin film and a hydrophobic nonwoven fabric is used. Core 4
Is a mixture of fluff pulp and superabsorbent polymer particles, which is compressed to a required thickness and entirely covered with a water-permeable sheet such as tissue paper. For joining these members, an adhesive such as a hot melt adhesive, an adhesive material, or a technique of heat welding to each member can be used.

[0038]

According to the disposable wearing article of the present invention, the pocket opening toward the inside of the article can be easily formed without joining another member to the upper surface of the side flap. The first seal portions are opposed to and separated from each other in the longitudinal direction of the article, and extend obliquely so that the opposed interval gradually increases from the inside to the outside of the article, and the inflow port for excrement is narrow and the inside is wide. Therefore, it is possible to prevent the outflow of excrement that has flowed into the pocket.

Further, since the first seal portion is inclined so as to be parallel to the end edge of the core, the expansion limit when expanding both ends in the longitudinal direction of the side flap to the outside to form the wing portion. And to contact the wearer's thigh diagonally in a natural state.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a disposable diaper.

FIG. 2 is a plan view of the diaper showing a state before bending the side flaps.

FIG. 3 is a view showing a cross section taken along line AA of FIG.

FIG. 4 is a view showing a cut surface of a side flap having a configuration different from that of FIG.

FIG. 5 is a perspective view of the diaper showing a state in which the tape fastener is engaged with the front waist region.

FIG. 6 is a partially cutaway plan view of a diaper of a mode different from that of FIG.

FIG. 7 is a view showing a section taken along line BB in FIG.

8 is a view showing a cross section taken along line CC of FIG.

[Explanation of symbols]

1 disposable diapers 2 Liquid-permeable top sheet 3 Liquid-impermeable backsheet 4 Liquid-absorbent core 4a side edge 4b edge 5 side flaps 5a first part 5b Second part 5c Third part 5d Base side 5e Opposing side 6a First seal part 6b Second seal part 7 Elastic stretchable member 8 Elastic stretchable member 9 liquid resistant sheet 30 1st curve 31 Second curve X center line

─────────────────────────────────────────────────── ───Continued from the front page (56) Reference JP 62-199807 (JP, A) JP 2-191452 (JP, A) JP 2-152452 (JP, A) JP 4- 200543 (JP, A) JP 62-250201 (JP, A) JP 8-215239 (JP, A) JP 7-112003 (JP, A) Actual flat 2-58425 (JP, U) Actual Kaihei 6-9625 (JP, U) Special Tables 10-511275 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61F 13/15-13/84

Claims (8)

(57) [Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbent core interposed between these sheets, and includes a front and rear waist region and a crotch region, and a longitudinal direction and a width. A disposable wearing article having a side flap having a direction, and extending to the outside in the width direction from each of both side edges of the core in at least the crotch region and having an elastic stretchable member attached in the longitudinal direction, the side flap. Is folded inside the article,
A first portion and a second portion located above the first portion are defined, and the first portion and the second portion are spaced apart from each other in the longitudinal direction so as to face each other from the inside to the outside of the article. First and second elastic members that are joined to each other at a pair of seal portions that are inclined so that the opposing distance gradually increases toward the first portion and the second portion and that extend in the longitudinal direction as the elastic members. Is attached in a stretched state. 2. A contraction of the second elastic member located in the second portion when the elastic members are released from the expanded state and the elastic members contract in the first portion and the second portion. The wearing article according to claim 1, wherein a dimension to be performed is larger than that of the first elastic member located in the first portion. 3. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbent core interposed between these sheets, and the front and rear waist regions and the crotch region, and the longitudinal direction and width. And a side flap extending toward the outer side in the width direction from both side edges of the core and virtual extension lines of the core in the longitudinal direction, and having side flaps to which elastic elastic members are attached in the longitudinal direction. In the article, the side flap is folded inside the article,
A first part and a second part located above the first part are defined, and the first part and the second part in the crotch region are
They are joined to each other at a pair of seal portions that are opposed to each other in the longitudinal direction and are inclined so that the opposing distance gradually increases from the inside to the outside of the article, and at least one of the first portion and the second portion. Is
The wearing article, wherein the elastic member is attached in an expanded state. 4. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbent core interposed between these sheets, and the front and rear waist regions and crotch regions, and the longitudinal direction and width. A disposable wearing article having a side flap having a direction, and extending to the outside in the width direction from each of both side edges of the core in at least the crotch region and having an elastic stretchable member attached in the longitudinal direction, the side flap. Is bent inward of the article and further bent outward of the article, and is positioned above the first portion, a second portion above the first portion, and above the second portion. A first portion and a second portion that are opposed to each other in the longitudinal direction and are inclined so that the opposing distance gradually increases from the inside to the outside of the article. Joined to each other at a first seal portion, the second portion and the third portion are joined to each other at a second seal portion located between the first seal portions, and the first portion includes the elastic portion. A first elastic member extending in the longitudinal direction is attached as a member in a stretched state, and a second elastic member extending in the longitudinal direction as the elastic member is extended in at least one of the second portion and the third portion. The wearing article according to claim 1, wherein the wearing article is attached. 5. At least the second portion and the third portion when the elastic members are released from the expanded state and the elastic members contract in the first portion and the second and third portions. The wearing article according to claim 4, wherein a contracting dimension of the second elastic member located on one side is larger than that of the first elastic member located on the first portion. 6. The side flap is formed of at least one of the top sheet and the back sheet that extend outward in the width direction from both side edges of the core. The wearing article according to any one of claims. 7. The liquid resistant sheet, wherein the side flaps are joined to the upper surface of the top sheet in the vicinity of both side edges of the core and extend from each of the side edges to the outside in the width direction, and the liquid resistant sheet. The wearing article according to any one of claims 1 to 5, which is formed by the back sheet that is overlapped with and joined to each other. 8. The core comprises, in the crotch region, a side edge and a pair of edges that are opposed to each other in the longitudinal direction and incline so that the opposing distance gradually increases from the inside to the outside of the article. The wearing article according to any one of claims 1 to 7, which has a substantially hourglass shape in which a recessed portion is formed, and the seal portion is parallel to the edge.