JP3510125B2 - Disposable diapers - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an open-type disposable diaper.

[0002]

2. Description of the Related Art A disposable diaper in which front and rear waist regions are fastened with a pair of adhesive left and right tape fasteners is known. The fastener has its inner end fixed to the side edge of the rear waist region of the diaper body, and its outer end folded back inward in the width direction of the diaper body to form on the side edge of the rear waist region. It is detachably temporarily attached to the released area. Such diapers are disclosed in JP-A-60-119944 and JP-A-62-62.
It is disclosed in Japanese Patent No. 243803, Japanese Patent Laid-Open No. 62-243804, and the like.

When the diaper is worn, the adhesive area formed on the outer end portion of the fastener is attached to the outer surface of the front waist region of the diaper body. A non-adhesive gripping portion to which no adhesive is applied is formed at the tip of the outer end portion, and the fastener is adhered by the gripping portion.

[0004]

In these known diapers, generally, either one of the fasteners located on the left side and the right side of the rear waist region is alternately attached. For example, hold the diaper body with your right hand, hold the fastener located on the left side with your left thumb and forefinger, and attach it to the outer surface of the front waist region, then hold the diaper body with your left hand and place it on the right side. Hold the fastener with your right thumb and forefinger and attach it to the outer surface of the front waist region.

These known diapers require the use of both hands when applying either one of the fasteners. In addition, when attaching one after attaching the other, it is necessary to replace the right hand holding the diaper body with the left hand and the left hand holding the fastener with the right hand.

An object of the present invention is to provide a disposable diaper in which the front and rear waist regions of the diaper can be fastened to each other by one operation without changing the operation of the hand.

[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 a front waist region, a back waist region, and a crotch region located between these front and rear waist regions in the longitudinal direction, and extends in parallel to each other in the longitudinal direction. It has both side edges and front and rear end edges extending in parallel to each other in the width direction intersecting the longitudinal direction, and elastic elastic members extending in the width direction are attached in an extended state to the front waist region. It is an open-type disposable diaper that is used.

On this premise, a feature of the present invention is that the front and rear waist regions are fastened to each other on the upper surfaces of both side edges of one of the front waist region and the rear waist region. A pair of first engaging portions are formed, and a pair of second engaging portions that are attachable to and detachable from the first engaging portions are formed on the lower surfaces of the other side edge portions of the other of the front and rear waist regions. Each of the other side edges including the second engaging portion is folded over the upper surface of the diaper and is releasably fixed to the upper surface.

As an embodiment of the present invention, the first engagement portion is formed at a side edge portion of the front waist region and a second engagement portion is formed at a side edge portion of the rear waist region. There is.

As another embodiment of the present invention, the first engaging portion is formed at a side edge portion of the rear waist region and a second engaging portion is formed at a side edge portion of the front waist region. Has been done.

As another embodiment of the present invention, the first
The engagement portion is formed of one member of mechanical fasteners including a loop member and a hook member, and an inner end portion of the member is fixed to one of the both side edge portions of the front and rear waist region, An outer end of the member extends outward in the width direction from both side edges of the front and rear waist regions, and the second engaging portion is the other member of the mechanical fasteners including the loop member and the hook member. Has been formed.

As another embodiment of the present invention, the first
The engaging portion is formed of an adhesive applied on the upper surface of a synthetic resin film, the inner end portion of the film is fixed to one of the both side edge portions of the front and rear waist region, and the outer end portion of the film. Is a synthetic resin film that extends outwardly in the width direction from both side edge portions of the front and rear waist region, and the second engaging portion is attached to the lower surface of the other side edge portion of the other front and rear waist region. Has been formed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of a disposable diaper 1. The diaper 1 is composed of a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-absorbent core 4 interposed between these two sheets 2 and 3, and a front waist region 20 in the longitudinal direction. And the rear waist region 22 and these front and rear waist regions 2
0,22 and a crotch region 21 located between the front and rear waist regions 20,22 extending in parallel with each other in the longitudinal direction, and side edge portions 20a, 22a and a width direction intersecting with the longitudinal direction. It has both edge portions 20b and 22b extending in parallel.

A pair of first engaging portions 5 extends in the width direction of the diaper 1 along both end edges 20a of the front waist region 20 along the end edges 20b of the front waist region 20. . First engaging portion 5
Is formed of an adhesive 5a applied to the upper surface of a synthetic resin film piece. The pressure-sensitive adhesive 5a is applied with the tip 5b located on the outer side in the width direction of the film piece slightly left. The lower surface of the first engagement portion 5 is fixed to the top sheet 2 at the side edge portion 20a of the front waist region 20.

Both side edge portions 22a of the rear waist region 22 are folded toward the upper surface of the top sheet 2 toward a center line Y which divides the width direction of the diaper 1 into two equal parts and extends in the longitudinal direction. The folded portion 22c is releasably fixed to the top sheet 2 at the dot-shaped joint 7. Part 2
A second engaging portion 6 extends in the width direction of the diaper 1 along the edge portion 22b of the rear waistline region 22 on the side of the back sheet 3 of 2c. The second engaging portion 6 is a film piece made of synthetic resin, and the lower surface of the backsheet 3 has the portion 22c.
Is stuck to.

The edge portions 20b of the front and rear waist regions 20, 22 are
In 22b, film-like elastic stretchable members 8 and 9 extending in the width direction along their edges are interposed between the top sheet 2 and the back sheet 3, and at least one of these sheets 2 and 3 is provided. It is fixed to one side in an extended state. A large number of thread-shaped elastic members 10 extending in the width direction are provided at substantially the center of the front waist region 20.
And is fixed to at least one of the sheets 2 and 3 in an extended state.

Recessed portions 11 are formed at the side edges of the crotch region 21 toward the center line Y, and a plurality of thread-like elastic members 12 extending in the longitudinal direction along the recessed portions 11 are formed on the top sheet 2. It is interposed between the back sheet 3 and is fixed to at least one of the sheets 2 and 3 in an extended state.

To fix the film pieces to the sheets 2 and 3 and to fix the elastic members 8, 9, 10 and 12 to the sheets 2 and 3, a technique of hot-melt adhesive or heat fusion is used. be able to.

The width W3 of the portion 22c in the rear waist region 22 of the diaper 1 is preferably in the range of 1 to 3 cm. Further, the width W1 of the front waist region 20 and the width W2 of the portion 22c between the inner edges 22d of the front waist region 20 can be appropriately determined depending on whether it is for an adult or a child. Is in the range of 26 to 30 cm, the dimension W2 is preferably in the range of 13 to 17 cm.

FIG. 2 is an operation explanatory view when fastening the side edge portions 20a, 22a of the front and rear waist regions 20, 22 to each other, and the thickness of the diaper 1 is omitted. In the figure, the front waistline region 20 is located on the side of the abdomen 23a of the wearer 23 who is lying down, and the back waistline region 22 is located on the side of the back part 23b of the wearer 23. In order to extend the portion 22c outward in the left-right direction from the back portion 23b of the wearer 23, the wearer 23 may be laid down in a state where the elastic member 9 of the rear waist region 22 is extended in the width direction.

To wear the diaper 1, (A) of FIG.
As shown in (D), the tip portion 5b of the first engaging portion 5 is held by the index finger and thumb. The front waist region 20 with the elastic member 8,
The first engaging portion 5 of the front waist region 20 is engaged with the second engaging portion 6 of the rear waist region 22 while extending outward in the width direction against the contracting force of 10. The part 22c includes elastic members 8, 9,
When the top sheet 2 is pulled upward by the contracting force of 10, the portion 22c is peeled off at the point-like joint portion 7 and folded back outward in the width direction.

FIG. 3 is a perspective view of the diaper 1 in a worn state. When the first engaging portion 5 and the second engaging portion 6 are engaged with each other, the waist opening 13 and the pair of leg openings 14 are formed in the diaper 1, and the waist opening 13 and the leg openings 14 are formed. And elastic members 8, 9, 1 in the central portion of the front waist region 20.
0 shrinks to form a gather.

4 and 5 are a partially cutaway perspective view of the diaper 1 different from that of FIG. 1 and a perspective view of the diaper 1 in a worn state. A pair of synthetic resin tape fasteners are attached to both side edge portions 20a of the front waist region 20.
The tape fastener has an inner end portion 5c located at the side edge portion 20a and extending toward the center line Y, and an outer end portion 5d extending outward from the side edge portion 20a in the width direction.

The lower surface of the inner end portion 5c is fixed to the top sheet 2 at the side edge portion 20a of the front waist region 20.
A loop member of the mechanical fastener that forms the first engaging portion 5 by slightly leaving the tip end portion 5b located outside the outer end portion 5d in the width direction on the upper surfaces of the inner end portion 5c and the outer end portion 5d. 5a is attached.

Both side edge portions 22a of the rear waist region 22 are folded toward the center line Y toward the upper surface of the top sheet 2. The folded portion 22c has a dot-like joint 7
In the above, it is detachably fixed to the top sheet 2.
The rear waist region 22 is provided on the back seat 3 side of the portion 22c.
The second engaging portion 6 extends in the width direction of the diaper 1 along the end edge portion 22b. The second engaging portion 6 is the hook member 6a of the mechanical fastener, and is the hook member 6a.
Is attached to the back sheet 3 at the portion 22c.

According to the order shown in FIG. 2, the front waist region 20.
When the first engaging portion 5 and the second engaging portion 6 of the rear waistline region 22 are joined to each other, the waistline opening 13 and the pair of leg openings 14 are formed.

FIG. 6 is a partially cutaway perspective view of the diaper 1 which is different from those shown in FIGS. Both side edges 22a of the front waist region 20 are folded toward the center line Y toward the upper surface of the top sheet 2. Folded part 20c
Are releasably fixed to the top sheet 2 at the dot-shaped joints 7. On the side of the back sheet 3 of the part 20c, along the edge portion 20b of the front waist region 20, the diaper 1
The second engaging portion 6 extends in the width direction of. Second engaging portion 6
Is a loop member 6a of the mechanical fastener, and the loop member 6a is attached to the back seat 3 at the portion 22c.

A pair of synthetic resin tape fasteners are attached to both side edge portions 22a of the rear waist region 22. The tape fastener has an inner end portion 5c located at the side edge portion 22a and extending toward the center line Y, and an outer end portion 5d extending outward in the width direction from the side edge portion 22a.

The inner surface of the inner end portion 5c is fixed to the top sheet 2 at the side edge portion 22c of the rear waist region 22.
A hook member 5a of the mechanical fastener forming the first engaging portion 5 is attached to the upper surfaces of the inner end portion 6b and the outer end portion 6c.

In FIG. 6, the front waist region 20 of the diaper 1 is shown.
The dimension W3 of the portion 20c in the width direction is 1 to 3 cm.
It is preferably in the range of. Moreover, when the width W1 of the rear waist region 22 is in the range of 26 to 30 cm, the width W2 of the portion 20c between the inner edges 20d is preferably in the range of 13 to 17 cm.

For the tape fastener, a synthetic resin film,
Kraft paper and non-woven fabric can be used alone or in combination (laminate sheet).

As the top sheet 2, a hydrophobic non-woven fabric treated with a hydrophilizing agent or a hydrophilic non-woven fabric formed from 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, a synthetic resin film or a laminated sheet of a synthetic resin film and a hydrophobic nonwoven fabric is used. The core 4 is fluff pulp and superabsorbent polymer particles or a mixture of them and fibers for maintaining the shape of the core 4, compressed to a required thickness, and entirely covered with a liquid-permeable sheet such as tissue paper. Has been done.

Instead of the top sheet 2, the portion extending outward in the width direction from each side edge of the core 4 and the portion extending outward in the longitudinal direction from each end edge of the core 4 are liquid impermeable. The sheet can also be joined to the backsheet.

[0036]

According to the disposable diaper of the present invention,
It is possible to fasten the front waist region and the rear waist region with one operation while gripping both side edges of the front waist region and extending the front waist region outward in the width direction. Since it is not necessary to change the manual operation, the fastening operation in the open type diaper is easy.

[Brief description of drawings]

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

FIG. 2 is an operation explanatory view when fastening the front and rear waist regions to each other.

FIG. 3 is a perspective view of the diaper of FIG. 1 in a state in which front and rear waist regions are fastened to each other.

FIG. 4 is a partially cutaway plan view of a diaper having an aspect different from that of FIG.

5 is a perspective view of the diaper of FIG. 4 with the front and rear waist regions being fastened together.

FIG. 6 is a partially cutaway plan view of a diaper having an aspect different from those of FIGS.

[Explanation of symbols]

1 disposable diapers 2 Liquid-permeable top sheet 3 Liquid-impermeable backsheet 4 Liquid-absorbent core 5 First engaging part 5c inner end 5d outer edge 6 Second engaging part 8 elastic members 10 Elastic member 20 Front waist area 20a side edge 20c part 21 inseam 22 Rear waist area 22a side edge 22c part Y center line

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. ⁷ , DB name) A61F 13/15-13/84

Claims (5)

(57) [Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbent core interposed between these sheets, and a front waist region and a back waist region in the longitudinal direction. When,
While having a crotch region located between the front and rear waist regions, both side edge portions extending in parallel to each other in the longitudinal direction, and front and rear end edge portions extending in parallel to each other in a width direction intersecting the longitudinal direction. In the open-type disposable diaper in which the elastic stretchable member extending in the width direction is attached to the front waist region in the stretched state, of the front waist region and the back waist region. A pair of first engaging portions for fastening the front and rear waist regions to each other is formed on the upper surfaces of both side edge parts of one side, and the pair of first engaging parts on the lower surfaces of the other side edge parts of the front and rear waist region are A pair of detachable second engaging portions is formed in the first engaging portion, and each of the other side edge portions including the second engaging portion,
The diaper, which is folded over the upper surface of the diaper and is detachably fixed to the upper surface. 2. The first engaging portion is formed at a side edge portion of the front waist region and the second engaging portion is formed at a side edge portion of the rear waist region. Diapers. 3. The first engagement portion is formed at a side edge portion of the rear waist region and the second engagement portion is formed at a side edge portion of the front waist region. Diapers. 4. The first engaging portion is formed of one member of mechanical fasteners including a loop member and a hook member, and an inner end portion of the member is one of the front and rear waist regions. The outer ends of the member are fixed to both side edges,
2. The second engaging portion extending outward from the both side edges of the front and rear waist region in the width direction, and the second engaging portion is formed of the other member of the mechanical fasteners including a loop member and a hook member. The diaper described. 5. The first engagement portion is formed of an adhesive applied to the upper surface of a synthetic resin film, and the inner end portion of the film is fixed to one of the both side edge portions of the front and rear waist region. The outer end portion of the film extends outward in the width direction from both side edge portions of the front and rear waist region, and the second engaging portion is
The synthetic resin film is attached to the lower surfaces of the other side edges of the other front and rear waist region.
The diaper described.