JP2002085452A - Disposable paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lateral leakage by increasing the body fluid absorbing capacity by forming a body fluid retaining pocket externally in the sides of an absorber. SOLUTION: A disposable paper diaper has an absorbing unit 12 made up of an absorber 13 and crepe paper 14 surrounding the absorber 13, a permeable surface sheet 11A covering the surface side of the absorbing unit 12, a waterproof film 16 covering the reverse side of the absorbing unit 12, a back sheet 20 covering the exterior side of the waterproof film, and the crape paper 14 is extended outwardly of the side edges of the absorber 13, and a pouched body fluid retaining pocket P in which a body fluid from the side edges of the absorber is retained by retention of the body fluid exuding from the crepe paper 14 is formed, and an impermeable layer K is formed by wrapping the side edge of the crepe paper by the waterproof film 16 in a part of the part around the legs of the disposable paper diaper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable disposable diaper in which a bodily fluid retaining pocket or a water-impermeable layer is formed mainly on the outer side of an absorbent body so as to increase urine absorption capacity and prevent lateral leakage. About.

[0002]

2. Description of the Related Art Conventionally, a disposable diaper disclosed in JP-A-10-127687 is known. As shown in FIG. 20, the disposable disposable diaper has a liquid-permeable topsheet 5.
2, a waterproof film 53 made of polyethylene or the like, and an absorbent body 54 interposed between the two sheets, and a main body back sheet 51 is provided on the outer surface side of the disposable diaper main body 50.

The main body backsheet 51 has a two-layer structure of a front backsheet 55 and a backside backsheet 56. Between these two sheets 55 and 56, a waist around the waist opening of the paper diaper is sealed. Elastic elastic members 57 ... 58
Are provided, and abdominal elastic elastic members 59,... And dorsal elastic elastic members 60,. A first leg elastic member 61 for sealing around the leg and a second elastic member 62 for leg leg.
Are provided. This leg elastic first elastic member 6
1, ... are one or a plurality of elastically stretchable members continuously arranged from the front body F end of one leg around the crotch portion to the front body F end of the other leg, and The second elastic elastic members 62,... Are one or a plurality of elastic elastic members arranged continuously from the rear body B end of one leg around the crotch portion to the rear body B end of the other leg. is there. At the crotch portion of the paper diaper, the first elastically expandable members 61,... And the second elastically expandable members 62,... Are arranged along the width direction of the paper diaper while approaching each other without intersecting.

As shown in FIG. 21 and FIG. 22, this paper diaper main body 50 has a squeezed portion formed on a side portion and a substantially hourglass-shaped absorber in order to ease the contact of the crotch portion with the skin. 54, upper and lower crepe papers 63, which are also formed into substantially hourglasses, and cover the absorbers 54 for retaining the shape of the absorbers 54 and urine diffusion, etc .; a waterproof film 53 provided on the back side; And a liquid-permeable top sheet 52 provided on the side.

[0005]

However, in such a conventional disposable disposable diaper, the disposable diaper body 50 is not provided.
In assembling the waterproof film 53, as shown in FIG. 21, the side edge of the waterproof film 53 is cut out so as to protrude outward from the side edge of the absorber 54.
3a is folded back on the surface side and bonded with a hot melt adhesive. Thereafter, as shown by continuous circles in the figure, the hot melt adhesive is applied in a row in the longitudinal direction, and a liquid-permeable top sheet is formed on the upper surface thereof. 52 were bonded.

As a result, at the crotch portion, as shown in FIG. 22, the waterproof film 53 is joined by the hot melt adhesive S, and the flow path of the bodily fluid is shut off. There were problems such as being deterred.

Accordingly, a main object of the present invention is to provide a disposable paper diaper in which a bodily fluid retaining pocket or a water-impermeable layer is formed outside the side of the absorber to increase the bodily fluid absorbing capacity and to reliably prevent lateral leakage. Is to provide.

[0008]

According to a first aspect of the present invention, there is provided an absorbent unit comprising an absorbent body and crepe paper surrounding the absorbent body, and covering a surface side of the absorbent unit. A disposable paper diaper including a liquid-permeable top sheet and a back sheet covering a back side of the absorption unit, wherein at least a part of a leg circumference of the disposable paper diaper, crepe outside a side edge of the absorber. In addition to extending the paper, the crepe paper forms a bag-shaped bodily fluid retention pocket in which bodily fluid from the side edge of the absorber is retained.

Further, the present invention according to claim 2 provides an absorbent unit made of an absorbent body and crepe paper surrounding the absorbent body, a liquid-permeable topsheet covering the surface side of the absorbent unit, A waterproof film covering a back surface side, wherein at least a part of the leg circumference of the disposable paper diaper extends crepe paper outside a side edge of the absorber, and the waterproof film Thus, an impermeable layer in which the bodily fluid oozing from the crepe paper is retained is formed. In this case, the water-impermeable layer formed by the waterproof film can be formed by rolling the side edge of the crepe paper.

According to a fourth aspect of the present invention, there is provided an absorbent unit comprising an absorbent body and crepe paper surrounding the absorbent body, a liquid-permeable topsheet covering a surface side of the absorbent unit, A disposable paper diaper comprising a waterproof film covering a back side, and three-dimensional gathers standing on the front side on both sides of the front side, wherein at least a part of a leg circumference of the disposable paper diaper has a side edge of the absorber. While extending the crepe paper more outward than the waterproof film extending outward from the side edge of the crepe paper, and from the side edge of the crepe paper between the sheet forming the three-dimensional gathers It is characterized in that an impermeable layer for retaining the exuded body fluid is formed.

The gist of the invention described in claims 1 to 4 is as follows.
The point is to form a bag-shaped bodily fluid retention pocket for storing bodily fluid exuded by crepe paper, or to form an impermeable layer on the outer surface side of the crepe paper side edge. The advantage of such a configuration will be described with reference to FIG. 19. Conventionally, as shown in FIG. 19A, a waterproof film 53 extending outward from a side edge of an absorber 54 is provided with a disposable diaper body 50. Folded at the side end of the hot melt adhesive S
Although the film overlapped portion was completely adhered to the non-penetrating area Z where body fluids and the like could not enter, in the present invention, as shown in FIG. Since the body fluid pockets P extend to form body fluids moving laterally, the body fluids and the like stay in the body fluid pockets P and are stocked, so that the body fluid absorption capacity is increased and lateral leakage is reliably prevented. I will be. Also,
Since the water-impermeable layer is formed by wrapping the side edge of the crepe paper 63 with the waterproof film 53 or the like, it is possible to reliably prevent the body fluid and the like that has entered the body fluid retention pocket P from oozing out. In addition, it is preferable that the formation position of the bodily fluid retention pocket P is formed on the outer side of the absorber or on the outer side of the three-dimensional gather standing base end.

By the way, in the present invention, in order to improve the barrier function in the three-dimensional gather part, a gather part absorber is provided inside the double sheet constituting the three-dimensional gather, or the double sheet constituting the three-dimensional gather is provided. A gather part waterproof film can be provided inside the seat. This waterproof film can be formed by separately disposing a single waterproof film, but can also be formed by extending a waterproof film that covers the back side of the absorption unit.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[First Embodiment] FIG. 1 is a partially cutaway development view of a pants-type disposable paper diaper according to the present invention, and FIGS. 2 and 3 are views taken along the line II-II and III-III of FIG. 1, respectively. FIG. In addition, at required portions in the drawing, the bonding site is clearly indicated by the mark x.

As clearly shown in the figure, this pants-type disposable paper diaper is formed of a cotton-like material by a liquid-permeable top sheet 11A and a liquid-permeable second sheet 11B made of a nonwoven fabric and a waterproof film 16 made of polyethylene or the like. This is a paper diaper having a structure in which a main body back sheet 20 is integrally provided on the outer surface side of a paper diaper main body 10 having a structure including an absorption unit 12 made of pulp or the like. The second sheet 11B may have a structure without the second sheet 11B. The present embodiment is a pants type, but is not limited to the pants type, and may be a tape type or the like.

Hereinafter, the structure of the main body back sheet 20 and the disposable diaper main body 10 and the assembly structure thereof will be described in order.

(Structure of the main body backsheet 20) The main body backsheet 20 is formed by laminating an inner backsheet nonwoven fabric 22 and an outer backsheet nonwoven fabric 21 with a hot-melt adhesive. In order to form a portion, the outer shape is larger than the paper diaper main body 10 and has a pseudo hourglass shape as a whole.

Between the inner backsheet nonwoven fabric 22 and the outer backsheet nonwoven fabric 21 forming the main body backsheet 20, the disposable diaper is fitted to the wearer and the leakage of bodily fluids and feces is prevented. The elastic elastic members having various functions are interposed therebetween and are fixed by a hot melt adhesive.

Specifically, in the unfolded shape shown in FIG. 1, the opening of the front body F and the opening of the back body B have:
In the illustrated example, four elastic waist elastic members 23,..., 24,.

A plurality of, for example, five abdominal elastic elastic members 25 made of thread rubber, in the illustrated example, are provided along a lateral direction at a position corresponding to the abdomen of the front body F, and both ends are provided. Are located at positions corresponding to the abdomen, and a plurality of, in the example shown, six elastic elastic members 26, 2 for lifting the front body, which are formed of thread rubber having a central portion bulging to the crotch side.
.. Are provided, and a plurality of, for example, six hip elastic elastic members 27, 27... Made of thread rubber are provided along the lateral direction at the buttocks of the back body B. .

In the disposable disposable diaper according to the present invention, a conventional leg elastic elastic member, that is, as shown in FIG. One or a plurality of leg elastic first elastic members 61, 61... Disposed continuously from the front body F end of the leg around the crotch portion to the front end F of the other leg. One or a plurality of leg elastic second elastic members 6 continuously arranged from the rear body B end of the leg to the crotch portion to the rear body B end of the other leg.
Are not provided.

(Structure of Disposable Diaper Body 10) The absorbent unit 12 has a large upper absorbent body 13A on the top sheet 11A side and a rectangular lower absorbent body 1 with a slightly smaller area.
3B, and a crepe paper 14 surrounding the absorber 13, specifically, an upper crepe paper 14A,
It is a component that contributes to the absorption of bodily fluids such as urine and stool juice from the lower crepe paper 14B, and has a semi-rigid property that can be deformed as a whole. A liquid-permeable second sheet 11B is provided on the upper surface of the absorption unit 12 so as to cover the central area thereof, and a liquid-permeable top sheet 11A is provided on the upper surface of the liquid-permeable second sheet 11B. It is fixed with a hot melt adhesive so as to cover almost the entire surface. Further, the absorption unit 12
A waterproof film 16 is also fixed to the lower surface of the paper diaper with a hot melt adhesive to constitute the disposable diaper main body 10.

Hereinafter, the structure of the disposable diaper main body 10 will be described in detail with reference to FIGS. 2 to 4. The absorbing unit 12 includes an absorbent body 13 serving as a main absorbent for bodily fluids such as urine and stool juice, and an absorbent body 13 for absorbing the body fluid. And a crepe paper 14 surrounding the body 13. In the illustrated example, the absorber 13 is configured as a laminate of an upper absorber 13A on the top sheet 11A side and a rectangular lower absorber 13B having a slightly smaller area in order to increase the amount of absorption at the urination site. ing. This absorber 13 is, of course, an upper absorber 13A and a lower absorber 13A.
It may be an absorber having a single-layer structure using B alone. The absorber 13 may be any as long as it can absorb and hold bodily fluids. Usually, a mixture of fluffy pulp mixed with a water-absorbing polymer powder is preferably used in terms of absorption function and cost. In the illustrated example, the planar shape of the absorber 13 is an hourglass shape in order to ease the contact with the crotch portion. However, the planar shape may be any planar shape adopted in this type of disposable diaper, such as a square shape, an oval shape, and the like. Can be.

The absorbent body 13 is covered with crepe paper 14 in order to keep the shape of the absorbent body 13 and to prevent an absorbent member such as polymer or cotton from being exposed to the surface of the diaper. In this example, the two crepe papers, that is, the lower surface side of the absorber 13 are covered and extend to almost the side end of the disposable diaper main body 10, and are folded back to the upper surface side at the side end position. Lower crepe paper 14B reaching side
And both sides are covered by an upper crepe paper 14A joined to the side of the lower crepe paper 14B while covering the upper surface of the absorber 13. The planar shape of the upper crepe paper 14A and the lower crepe paper 14B is square, and the binding portion 13a of the absorber 13 has
Does not exist and the lower layer crepe paper 14B
A bodily fluid retaining portion P (hereinafter, referred to as a bodily fluid retaining pocket) communicating with the side edge portion of the body fluid is formed. In this example, two crepe papers 1 are used to cover the absorber 13.
Although 4A and 14B are used, they may be surrounded by one crepe sheet.

When the side portion of the waterproof film 16 is bonded to the upper side portion of the crepe paper 14 with a hot-melt adhesive, the crepe paper may bleed into the crepe paper 14 and be joined to each other. Adhesion is very weak,
When the body fluid or the like enters, the adhesive force is lost due to the moisture, and the overlapping crepe papers 14 are separated from each other, so that the body fluid retention pocket P is reliably formed.

The waterproof film 16 covering the outer surface of the absorption unit 12 is wound around the side edges of the lower crepe paper 14B on both sides forming the leg circumference, and the folded portion 16a is formed on the side of the lower crepe paper 14B. The water impermeable layer K is formed on the outer surface side of the bodily fluid retention pocket P by being adhered to the upper surface of the body with the hot melt adhesive S.

As the waterproof film 16, a sheet material having at least water-blocking properties, such as polyethylene or polypropylene, is used. In recent years, a film having moisture permeability has been tended to be suitably used from the viewpoint of preventing stuffiness. The water-permeable and moisture-permeable sheet material is, for example, a microporous material obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet uniaxially or biaxially. Sheets are preferably used. The waterproof film 16 may be configured to also serve as a back sheet that forms an outer surface that covers the back surface of the absorber 13.

On the other hand, two nonwoven fabrics, a liquid-permeable second sheet 11B and a liquid-permeable top sheet 11A, are used in the present embodiment as surface sheets covering the upper surface of the absorption unit 12. The liquid-permeable second sheet 11 </ b> B
The liquid-permeable top sheet 11 </ b> A is disposed so as to cover substantially the entire surface of the absorption unit 12. The liquid-permeable second sheet is made of a non-woven fabric such as an olefin such as polyethylene or polypropylene, a polyester, or a nylon, or a hydrophilic non-woven fabric coated with a silicon-based, paraffin-based metal, or an alkylchromic chloride-based water repellent. The one liquid-permeable top sheet 11A is made of a hydrophilic non-woven fabric, specifically, cellulose fibers such as cotton and rayon,
Acrylonitrile, synthetic fibers having a hydrophilic group such as polyvinyl alcohol, polyethylene, polypropylene,
Fibers and the like, which have been made hydrophilic by imparting hydrophilicity by treating a hydrophobic fiber such as polyester with a hydrophilic agent, are used.

On the other hand, at a position outside the side edge of the absorber 13, between the lower crepe paper 14B and the waterproof film 16, elastic absorbers 15, 15 for lifting the absorber are fixed along the longitudinal direction of the diaper. ing. As shown in FIG. 1 to FIG. 3, this elastic body lifting elastic stretching member 15 is relatively wide at the front and rear ends of the hourglass-shaped upper absorbent body 13A constituting the absorbing unit 12. It is arranged along the longitudinal direction so as to pass through the central constricted portion 13a with both sides of the portion as the starting end. Further, as shown in cross-sectional view of FIG. 2, wherein the stereoscopic relative positional relationship of the gathers B ₁ represents at least diapers longitudinal central portion disposed inside position than the standing point of the three-dimensional gathers B ₁ I have. It is desirable to arrange the elastic lifting member 15 for lifting the absorber under the conditions that the expansion and contraction ratio is approximately 120 to 300% and the elastic strength is 5 to 150 g.

The absorbent elastic member 1 for lifting the absorber
5 is interposed between the lower crepe paper 14B and the waterproof film 16 in the illustrated example, but may be interposed between the paper diaper main body 10 and the main body back sheet 20. In this example, one elastic expansion member is arranged, but a plurality of elastic members may be arranged.

The absorbent elastic lifting members 15, 1, 1, 2, 1, 2, 3, 4, 5, 6, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 9, 9, and 9.
5 can effectively prevent the absorption unit 12 from hanging down even if urination and defecation are performed on the absorption unit 12 and the weight increases. As a result, eliminates a gap is formed between the crotch portion, the standing gather B ₁ is for eliminating it away from the skin, so that side leakage can be reliably prevented. In addition, by preventing the absorption unit 12 from sagging, it is possible to prevent the appearance of the mounted state from being deteriorated, and it is also possible to simultaneously prevent the wearability from being deteriorated.

On the other hand, in the disposable diaper of the present invention, since the leg elastic elastic member that is disposed along the conventional leg and traverses the absorber at the crotch is eliminated, the trace of rubber is removed. It is possible to eliminate sticking, and simultaneously prevent stiffening and shrinkage of the absorber due to the contraction force of rubber, so that the feeling of stickiness is eliminated and the feeling of wearing is improved. In addition, it is possible to prevent a situation in which bodily fluid leaks from a groove or a wrinkle caused by the contraction of the absorber. Furthermore, the appearance can be improved by eliminating the elastic elastic member that crosses the crotch portion.

As another arrangement of the elastic lifting member 15 for lifting the absorber, as shown in FIG. 8, in the crotch region, it is arranged in an arc shape along the leg around the constricted portion 13a in the crotch region. , As shown in FIG.
The constricted portion 1 is provided in the upper absorbent body 13A and at a side edge thereof.
It can also be arranged in an arc along the shape of 3a. In these arrangements, a force directed outward (outward in the width direction) acts on the absorption unit 12 due to the absorber elastic elastic members 15, 15 arranged in an arc shape. 12 can be simultaneously prevented from gathering at the center in a bundle.

The absorbent elastic member 1 for lifting the absorber
In order to hold the absorbing unit 12 tightly so that the absorbing unit 12 does not hang down, the front and rear ends (fixing points) of the elastic body lifting elastic elastic member 15 must be held in a state where the position is not so much shifted. Therefore, it is preferable that both ends of the elastic body lifting elastic stretching member 15 are fixed to a region where the absorbing unit 12 is provided.

On the other hand, on both sides of the surface of the disposable diaper main body 10, three-dimensional gathers B are provided by gather sheets 30, 30.
₁ and B ₁ are provided.

As shown in FIG. 2 and the like, the gather sheet 30 is formed such that the base end of the double sheet with the gather distal end as a folded line is attached to the upper surface side of the absorption unit 12 with a hot melt adhesive. A plurality of elastically stretchable members 31, in the illustrated example, six in the height direction are provided inside the double-formed gather sheet 30 in a fixed manner.
31 ... are provided. This gather sheet 30
At the front and rear ends of the disposable diaper main body 10, as shown in FIG. 3, an upright portion is folded outward with a predetermined width, and the liquid-permeable top sheet-facing surface is bonded with a hot melt adhesive. The surfaces up to are also bonded by a hot melt adhesive.

As a result, in the state of use of the product, only the middle portion thereof is a free end, and is raised in a V-shape in accordance with the contraction force of the first standing elastic elastic members 31, 31. ₁ . Further, a plurality of elastically expandable and contractible members 31, 31 are arranged along the height direction of the upright portion.
Are arranged so that the upright portions are pleated, so that the degree of adhesion to the skin is improved and lateral leakage is reliably prevented. The gather sheet 30 constituting the three-dimensional gathers B _1, in order to increase as much as possible while preventing the permeation of the body fluid decreases the liquid-permeable, feel of the preventing and skin rash (the dry feeling), silicon ,
It is desirable to use a water-repellent nonwoven fabric coated with a paraffin metal-based, alkylchromic-cloid-based water-repellent, or the like. Examples of the elastic elastic member 31 and the elastic elastic member 15 for lifting the absorber described below include styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, and styrene rubber which are usually used. Materials such as silicon and polyester can be used.

[0038] The mounting position of the standing gather B ₁ represents, in the above example was both sides of the absorber unit 12, slightly inboard position, or absorption side edge can also be a side edge near the position. Further, formation of the standing gathers B ₁ represents, is provided respectively Article 1 by one on both sides of paper diaper main body 10 in this example may be provided Article 2 increments.

(Assembly of the disposable diaper) The disposable diaper body 10
The main body backsheet 20 is manufactured separately, and the disposable diaper main body 10 is bonded to the upper surface side of the main body backsheet 20 with an adhesive S such as hot melt and integrated as shown in FIG. Then, as shown in FIG. 7, the disposable diaper main body 10 and the main body back sheet 20 are provided.
Are folded in the front-rear direction at the folding line L, and both sides thereof are joined to each other by heat welding or a hot-melt adhesive to assemble into a pants-type paper diaper.

[Another Embodiment of the Present Invention] (Second Embodiment) A disposable diaper according to a second embodiment shown in FIG. 10 is provided at a position outside a bodily fluid retaining pocket P formed by crepe paper 5. it is obtained by forming a impermeable layer P ₁ confining by staying the exuded fluids from the fluid retention pocket P.

As shown in FIG.
4B extending beyond the side edge of the absorber 13
Fold back to the top side, and also outward from the side edge of absorber 13
It is superimposed on the extended upper crepe paper 14A,
It communicates with the side edge of the absorber 13 by the rape paper 14B.
Body fluid retention pocket P and
Of the lower crepe paper 14B outside the side edge of the lower crepe paper 14B.
After extending to the leg circumference, turn it around at the side edge of the paper diaper
Glued to the upper surface of the crepe paper 14 to form a water-impermeable layer P ₁Form
are doing. As a result, bleeding from the body fluid retention pocket P
When there is a protruding body fluid, the impermeable layer P located on the outer side₁
Occluded space in which bodily fluid oozing out of the absorber is retained
Is formed, and stagnation of bodily fluids to prevent leakage
Stop.

In the case of the present embodiment, the hot melt adhesive S is applied to and adhered to the upper surface of the overlapping portion 14C of the crepe papers 14A and 14B when the waterproof film 16 is joined. The hot-melt adhesive S impregnates the lower crepe paper 14B, which is located relatively on the upper side, to simultaneously bond the overlapped portion 14C of the lower crepe paper 14B and the upper crepe paper 14A. Therefore, the adhesion of the waterproof film 16 and the crepe papers 14A,
If the configuration that also serves to bond the overlapping portions 14C between the 4Bs is used, the amount of hot melt adhesive used can be reduced, and the hot melt adhesive can be bonded to the lower surface of the upper crepe paper 14A, which is relatively lower. Since the impregnation with the agent is suppressed and the flow path to the end of the body fluid retention pocket P is easily secured, an increase in the body fluid absorption can be expected.

[Third Embodiment] FIG. 11 is a partially exploded development view when the present invention is applied to a tape-type disposable diaper, and FIG. 12 is a view taken in the direction of arrows XII-XII in FIG.

In FIG. 11, the disposable paper diaper is
A liquid permeable top sheet 2 made of a perforated or non-porous nonwoven fabric and covering the surface to be used, and a nonwoven fabric covering the outer surface of the disposable diaper, and forming a flap portion SF together with a gather sheet 7 described later on both front and rear ends of the diaper. At the front and rear end portions of the diaper, the back sheet 1 constituting the end flap portion EF together with the liquid permeable top sheet 2 and the cotton-like pulp or the like interposed between the liquid permeable top sheet 2 and the back sheet 1 A range substantially covering the absorber 4 between the back unit 1 and the absorption unit 3 composed of the absorber 4 having a certain rigidity in the shape of an hourglass (or a rectangle or the like) and the crepe paper 5 surrounding the absorber 4. consisting disposed polyethylene or the like to the waterproof film 6, a gather sheet 7 forming the standing gather B ₁ erected on the surface side on both sides of the paper diaper, paper It mainly comprises fastening tapes 8 provided on both sides of the back of the diaper.

[0045] The hourglass shape form as a whole the absorber 4, the portion 4a, 4 constricted so as to have a side edge inwardly than the base end position of the three-dimensional gathers B ₁ crotch corresponding portion of the opposite side edges
a is formed. The absorber 4 is surrounded by a crepe paper 5 having a rectangular shape in plan view. As the crepe paper 5, one crepe paper is used, and approximately the center of the upper surface of the absorber 4 is provided as a superposed portion of both edges.

On the other hand, in this example, the backsheet 1 made of nonwoven fabric is used instead of the liquid-impermeable backsheet made of polyethylene or the like which is usually used to cover the outer surface of the diaper, and the body fluid absorbed by the absorption unit 3 is used. A waterproof film 6 made of polyethylene or the like is interposed between the back sheet 1 and the back sheet 1 in order to prevent the bleeding from oozing out to the outer surface side and to retain the body fluid. The waterproof film 6 is shown in FIG.
As shown in FIG. 4, the crepe paper 5 is projected outward from the side edges thereof in advance, folded back to the upper side so as to wrap the side edges of the crepe paper 5, and the hot melt adhesive S It is adhered by. As a result, the absorbent body 4 does not exist on the intermediate side portion (the constricted portion 4a) of the absorbing unit 3 due to the crepe paper 5, and the outer surface side oozes out of the crepe paper 5 due to the side edge wrapping of the waterproof film 6. A bodily fluid retention pocket P, which is an impermeable layer K for blocking the bodily fluid, is formed, and the exuded bodily fluid is retained by the bodily fluid retention pocket P.

On the other hand, the gather sheet 7 has an intermediate portion in the width direction at the side edge portion of the absorbing unit 3 fixed along a substantially longitudinal direction of the disposable diaper. standing gathers B ₁ is formed to stand up. This three-dimensional gather B ₁ has a standing base point near the side edge of the absorption unit 3, and its tip is double-folded along the longitudinal direction of the paper diaper, and one thread-like elastic rubber is provided inside the folded portion. By disposing 9a or, if necessary, a plurality of thread-like elastic rubbers,
And it is adapted to erect the standing gather B ₁ by utilizing the stretching force.

On the other hand, at the front and rear end portions of the paper diaper, an end flap portion EF formed by the back sheet 1 and the liquid-permeable top sheet 2 is formed outside the waterproof film 6 so as to form a tape-like elastic member 9C. 9C are interposed.

[Another Embodiment of Disposable Disposable Diaper] Hereinafter, another embodiment of the present invention will be described with reference to the drawings.
Although the description will be made using an example of a tape-type disposable diaper, the present invention can be similarly applied to a pants-type disposable diaper. Further, although the structure of the disposable diaper is slightly different in each embodiment, the same reference numerals are given to those having the same functions.

(Fourth Embodiment) A disposable diaper according to a fourth embodiment shown in FIG. 13 is provided at a position outside a bodily fluid retaining pocket P formed by crepe paper 5 according to another embodiment of the present invention. It illustrates another structural example of forming the impermeable layer P ₁ confining by staying the exuded fluids from the fluid retention pocket P.

As shown in the figure, the crepe paper 5 forms a bodily fluid retention pocket P at a position outside the side edge of the absorber 4. Impermeable layer P ₁ is a waterproof film 6 over the side edge of the crepe paper 5, gather sheet 7 and the backsheet 1
Is extended to the paper diaper side edge, and is formed by bonding the gather sheet 7 and the hot melt adhesive S at the paper diaper side edge.
At this time, the gather sheet 7 adheres only to the upper surface of the side edge of the top sheet 2 except for the adhesive to the gather sheet 7 at the side edge of the disposable diaper, so that the side flap SF
If the gather sheet lower region R of the Oke as a non-adhesive, as shown in FIG. (B), it becomes possible to form the impermeable layer P ₁ to form a relatively large fluid retaining space Thus, the body fluid absorption can be increased.

[0052] As the gather sheets 7 in the present embodiment, for example, the side flaps SF portion of the water-repellent treatment nonwoven or gather sheet 7 is desirable to laminate a nonwoven fabric laminated with a plastic film, thereby to impermeable layer P ₁ Leakage of the retained body fluid to the outside can be prevented.

As shown in FIG. 14, a stagnant absorber 35 may be provided inside the water-impermeable layer P1 to absorb and retain the exuded body fluid.

(Fifth Embodiment) The disposable diaper according to the fifth embodiment shown in FIG. 15 is different from the disposable diaper according to the third embodiment described above in that the surface of the liquid-permeable top sheet 2 flows down to the side and has three-dimensional gathers. when there is a body fluid or the like leading to B _1, in order together reliably to hold absorb body fluid or the like in the stereo gathers B ₁ parts are once body fluid that has moved to the absorbed side mass, In the case of exceeding the stock amount of the bodily fluid retention pocket P according to the present invention and returning to the surface side,
This bodily fluid and the like are reliably blocked and absorbed and held.

[0055] Specifically, as shown in the figure, three-dimensional gathers B ₁ gathers sheet 7 forming a configured double sheet, gather portion absorbent core 3 inside the double sheet
2 is provided, so as to prevent side leakage absorbed held by the body fluids or the like gather portion absorber 32 leading to the stereo gathers B _1.

[0056] Diapers according to the sixth embodiment shown in (Sixth embodiment) FIG. 16 is for diapers and similar purposes according to the fifth embodiment, the blocking sheet body fluids such as standing gathers B ₁ Is provided.

[0057] Specifically, the gather sheet 7 forming the standing gather B ₁ constitutes a double sheet, the gather portion waterproof film 33 provided inside the double sheet, body fluid or the like leading to the stereo gathers B ₁ Is completely blocked by the gather part waterproof film 33 to prevent lateral leakage.

(Seventh Embodiment) A disposable diaper according to a seventh embodiment shown in FIG. 17 achieves the same object as the sixth embodiment by another structure.

[0059] Specifically, with extending the waterproof film 6 to the standing base site of standing gathers B _1, folded in the upright base portion, the double sheet the folded portion 6a to form the three-dimensional gathers B ₁ it is obtained so as to form a complete water-impervious wall standing gathers B ₁ so as to penetrate into the interior of the. As shown in the figure, the joint between the side edge of the crepe paper 5 and the waterproof film 6 was applied such that one half was polymerized on the side edge of the crepe paper 5 and one half was polymerized on the waterproof film 6. The connection is made by a hot melt adhesive 34.

(Eighth Embodiment) The disposable diaper according to the eighth embodiment shown in FIG. 18 is formed of the crepe paper 5 extending to the side of the absorber 4 in the first and third embodiments. Although the waterproof film 6 is wound around the side edge and adhered to the upper surface of the side of the crepe paper 5 with the hot melt adhesive, the waterproof film 6 extends slightly outward from the side edge of the crepe paper 5 in the eighth embodiment. The hot melt adhesive 34 is applied to the region between the crepe paper 5 and the waterproof film 6, and the bodily fluid oozing from the pocket P is damped to the side edge portion of the crepe paper, that is, outside the bodily fluid retention pocket P. The impermeable layer K to be stopped is formed.

[0061]

As described above in detail, according to the present invention, irrespective of the type of the tape type and the pants type, the body fluid stagnation pocket or the water-impermeable layer is formed around the leg of the absorber, thereby oozing out of the absorber. Since the closed space in which the discharged bodily fluid is retained is formed, the bodily fluid absorbing capacity is increased and lateral leakage can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a partially exploded development view of a pants-type disposable paper diaper according to a first embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a view taken along line III-III of FIG. 1;

4 is a plan view of the disposable diaper main body 10. FIG.

FIG. 5 is a view taken along line VV of FIG. 4;

FIG. 6 is a perspective view showing a procedure for integrating the disposable diaper main body and the main body back sheet 20 and a procedure for disposing the elastic elastic member 15 for lifting the absorbent body.

FIG. 7 is a perspective view of a product state of the pants-type disposable diaper.

FIG. 8 is a plan view of the disposable diaper main body 10 showing a modification of the arrangement of the absorbent lifting elastic members 15;

FIG. 9 is a plan view of the disposable diaper main body 10 showing another arrangement variation of the elastic body elastic member 15 for lifting the absorbent body.

FIG. 10 is a sectional view of a main part (intermediate side part) of a disposable paper diaper according to the second embodiment.

FIG. 11 is a partially exploded development view of the tape-type disposable paper diaper according to the third embodiment.

FIG. 12 is a view taken along line XII-XII of FIG. 11;

FIG. 13 is a sectional view of a main part (intermediate side part) of a disposable paper diaper according to a fourth embodiment.

FIG. 14 is a sectional view of a waist (middle side) showing a modification of the fourth embodiment.

FIG. 15 is a sectional view of a main part (intermediate side part) of a disposable paper diaper according to a fifth embodiment.

FIG. 16 is a sectional view of a main part (intermediate side part) of a disposable paper diaper according to a sixth embodiment.

FIG. 17 is a sectional view of a main part (intermediate side part) of a disposable paper diaper according to a seventh embodiment.

FIG. 18 is a sectional view of a main part (intermediate side part) of a disposable paper diaper according to the eighth embodiment.

FIG. 19 schematically shows the effect of the present invention, (A) is a bodily fluid flow diagram of a conventional disposable diaper, (B) is a bodily fluid flow diagram of the disposable diaper of the present invention, and (C) a bodily fluid of another embodiment of the present invention. FIG.

FIG. 20 is a development view showing a conventional pants-type paper diaper.

FIG. 21 is a structural explanatory view of a disposable diaper main body in a conventional pants-type disposable disposable diaper.

FIG. 22 is a view taken along line XXII-XXII of FIG. 21;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Back sheet, 2 ... Liquid permeable top sheet, 3 ... Absorption unit, 4 ... Absorber, 5 ... Crepe paper, 6 ... Waterproof film, 7 ... Gather sheet, 10 ... Paper diaper main body, 11
A: liquid-permeable top sheet, 11B: liquid-permeable second sheet, 12: absorption unit, 13: absorber, 13A: upper absorber, 13B: lower absorber, 14A: upper crepe paper, 14B: lower crepe paper , 15 ... Elastic elastic member for lifting the absorber, 16 ... Waterproof film, 20 ... Back sheet for main body, 21 ... Non-woven fabric for back sheet for outer surface, 22 ... Non-woven fabric for back sheet for inner surface, 23/24 ... Abdominal elastic elastic member, 26 elastic elastic member for lifting front body, 27 elastic elastic member for hip, 30 gather sheet, 31 elastic elastic member for standing, B ₁ solid gather

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3B029 BD12 BD14 4C098 AA09 CC11 CC12 CC14 CE05 CE06

Claims (4)

[Claims] 1. An absorption unit comprising an absorber and crepe paper surrounding the absorber, a liquid-permeable top sheet covering a front side of the absorption unit, and a back sheet covering a back side of the absorption unit. A disposable disposable diaper, wherein at least a part of a leg circumference of the disposable disposable diaper extends crepe paper outside a side edge of the absorber, and the crepe paper causes a body fluid from a side edge of the absorber. A disposable disposable diaper characterized by forming a bag-shaped body fluid retention pocket in which a fluid is retained. 2. An absorbent unit comprising an absorbent body and crepe paper surrounding the absorbent body, a liquid-permeable top sheet covering the front side of the absorbent unit, and a waterproof film covering the back side of the absorbent unit. A disposable disposable diaper comprising: a crepe paper extending outward from a side edge of the absorber in at least a part of a leg periphery of the disposable disposable diaper; and a bodily fluid oozing from the crepe paper by the waterproof film. A disposable disposable diaper characterized by forming an impermeable layer in which water is retained. 3. The disposable paper diaper according to claim 2, wherein the water-impermeable layer formed by the waterproof film is formed by wrapping a side edge of the crepe paper. 4. An absorbent unit comprising an absorbent body and crepe paper surrounding the absorbent body, a liquid-permeable top sheet covering a front side of the absorbent unit, a waterproof film covering a back side of the absorbent unit, and a front surface. A disposable paper diaper comprising three-dimensional gathers standing on the front side on both sides of the side, wherein at least a part of the leg circumference of the disposable paper diaper extends crepe paper outward from a side edge of the absorber. Impervious water that oozes the bodily fluid oozing from the side edge of the crepe paper between the waterproof film extending outward from the side edge of the crepe paper and the sheet forming the three-dimensional gathers. A disposable disposable diaper having a layer formed thereon.