JP2859743B2 - Absorbent articles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article, such as a disposable diaper, which is used for infants, adults, menstruation or incontinence.

[0002]

2. Description of the Related Art In a disposable diaper, various leak-proof mechanisms have been proposed for a crotch portion. For example, Japanese Patent Publication No. 52-40267, Japanese Patent Application Laid-Open No.
No. 15939, JP-A-52-120045,
And Japanese Unexamined Patent Publication No. 57-89602 discloses an elastic member 3 along a side edge of a disposable diaper 31 as shown in FIG.
A disposable diaper is disclosed, in which the disposable diapers 2 are arranged in a straight line, a gather is formed at the crotch portion, the gather is closely attached to the crotch portion of the wearer, and excrement is hardly leaked. Also, JP-A-49-93143, JP-A-50-33044, JP-A-50-161347, and JP-A-52-1
The absorbent articles described in Japanese Patent No. 84041 and Japanese Patent Laid-Open No. 57-210004 are so-called box-pleated diapers in which folded portions are provided on both side edges in the longitudinal direction of the absorber to form pockets. The absorbent article also has a pocket formed by folding the absorbent body to improve the absorption, retention and sealing of excrement.

Further, Japanese Patent Application Laid-Open Nos. 58-65002, 62-199802, and 62-19
No. 9806 discloses a technology in which an absorbent article has side flaps on both side edges in the longitudinal direction and a folded portion provided on the side flap to form a pocket. Each of these techniques is intended to improve the excrement absorption, retention and sealing properties, similarly to those described in the above publications.

Further, in recent years, Japanese Patent Application Laid-Open No. 62-25 / 1987
Japanese Patent Application Publication No. 0201 and Japanese Patent Application Laid-Open No. 62-223303 also propose a technique in which a side flap of a disposable diaper is provided with an expandable and contractible side wall to improve the capacity to hold and retain excrement.

[0005]

However, in the former disposable diaper of the box pleated type, since the absorber is folded back to form a seal mechanism with the absorber, the seal mechanism is inferior in flexibility, so that the wearer cannot wear the diaper. Difficult to fit body,
In addition, there was a problem that it was difficult to follow changes in body shape during activities. Further, since the folded absorber is configured to fit around the legs, excrement such as bodily fluids absorbed in the absorber of the relevant portion may overflow into the topsheet and wet the bedding, etc. There was a problem that excrement leaked and was accompanied by discomfort.

On the other hand, in the latter disposable diaper having a folded portion on the side flap, the pocket is flexible, so that the pocket is crushed by the wearer's body pressure or a change in the body shape during activity, and sometimes the side flap is folded inward. There is a problem that the sealing performance is deteriorated.

[0007] Further, in the case of an absorbent article in which the former box pleated type and the latter side flap are formed in multiple layers, the manufacturing process is complicated, high-speed productivity is hindered, and the folded dimensions of the absorbent article are stable. Lack of sex. further,
The article has a problem that the folded part is thick and bulky, so that the wearing feeling is poor, and the appearance of the article is extremely poor depending on the wearer, and these absorbent articles are not suitable for ordinary use.

Accordingly, an object of the present invention is to provide a simple structure,
An object of the present invention is to provide an absorbent article having a pocket capable of preventing excretion from leaking.

The present invention comprises a main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber located between the two sheets, and the main body is provided to the wearer when worn. a crotch portion located crotch, and ventral located ventrally, are divided into a rear section located on the back side, the main
The body has a widthwise outward direction from both longitudinal edges of the absorber.
An extended side flap is formed and the side flap is formed.
The front side flap located on the back side and the ventral side
Ventral side flap located and inseam located at crotch
In the absorbent article divided into side flaps , a pair of elastic members are stretched on both sides in the longitudinal direction of the main body over the abdominal part, the crotch part, and the back part, and the pair of elastic members, intervals at which the crotch section, above in widely spaced than the ventral and dorsal
Is placed under tension to the serial crotch side flaps, crotch under support
When the id flap is contracted to form leg gathers
In both cases, raise the inseam side flap to the top sheet side.
The leg crotch and the leg crotch
And an elastic member forming the leg gathers.
The object has been achieved by providing an absorbent article characterized in that a pocket portion is formed between the absorbent article and a side edge of the absorbent body .

[0010]

According to the absorbent article of the present invention, the main body is deployed, the back side is positioned on the wearer's back, the crotch is positioned on the wearer's crotch, and the abdomen is positioned on the wearer's abdomen. To wear.

When worn, in its natural state, the body is
Although the leg crotch is formed by the elasticity of the elastic member, the interval between the pair of elastic members at the crotch is formed wider than the abdomen and the back, so that the leg gather at the crotch includes: The stretching force acts toward the inside of the main body, and the leg gathers stand inward to form a pocket.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to FIGS.

In the following embodiments, disposable diapers for infants will be described as examples of absorbent articles.

As shown in FIG. 1, the disposable diaper 1
A liquid-permeable top sheet 2 that forms a side in contact with the skin of the wearer, a liquid-impermeable back sheet 3, and an absorber 4 disposed between the two sheets 2 and 3 for absorbing excrement. Main body 5.

[0015] The top sheet 2 is provided with an absorbent 4
It is preferable that the liquid-permeable sheet having a feel close to underwear is used as such a liquid-permeable sheet.
For example, a woven fabric, a nonwoven fabric, a porous film and the like are preferable.
Also, a method of applying a hydrophobic compound such as a silicone oil agent or paraffin wax to the peripheral portion of the top sheet 2 or a method of applying a hydrophilic compound such as an alkyl phosphate ester in advance and washing the peripheral portion with warm water are used. Water treatment,
Leakage due to bleeding of urine or the like at the peripheral portion can be prevented.

The back sheet 3 is made of a moisture-permeable, liquid-impermeable sheet that transmits a vapor that has been stretched by adding a filler to a thermoplastic resin, or a sheet that has a feel similar to underwear, such as a water-repellent nonwoven fabric or film. A composite material with a nonwoven fabric or a composite material with a film and a woven fabric is used.

The absorbent 4 is preferably composed mainly of fibrillated pulp and used in combination with a high-molecular water-absorbing polymer, and is preferably a mixture obtained by heat-treating a mixture of a thermoplastic resin, cellulose fibers, and a high-molecular water-absorbing polymer. . The location of the high-molecular-weight water-absorbing polymer may be any of the upper layer, the middle layer, and the lower layer, and may be a mixture with pulp. The high-molecular water-absorbing polymer has a retaining performance of absorbing and holding a liquid 20 times or more its own weight, and is preferably in the form of particles having a gelling property. Preferred are a starch-acrylic acid (salt) graft copolymer, a saponified starch-acrylonitrile copolymer, a crosslinked product of sodium carboxymethylcellulose, and an acrylic acid (salt) polymer. The shape is preferably an hourglass shape that matches the body shape of the wearer, but may be rectangular.

The main body 5 is formed in an hourglass shape with a narrow center in the longitudinal direction (vertical direction in the figure), and a crotch 6 is formed in the narrowed portion. In the wide part of the hourglass,
A back part 7 located on the back side of the wearer is formed, and an abdominal part 8 located on the abdomen side of the wearer is formed on the other wide part.

Waist flaps 9, 9 extending outward from the absorber 4 are formed at both longitudinal ends of the main body 5 on the back 7 and the abdomen 8, respectively. A pair of left and right side flaps 10, 10 are formed outward in the width direction. Side flaps 10, back-side side flaps 10A you located in the rear section, and 10A, the ventral side flaps 10B located on the ventral side portion, and 10B, be located in the crotch portion
Crotch side flaps 10C and 10C.

A waist elastic member may be stretched in the width direction on the waist flaps 9 to form gathers.

In the side flaps 10, 10, the top sheet 2 and the back sheet 3 are integrally formed by polymerization, and the top sheet 2 and the back sheet 3 preferably have substantially the same dimensions. One of them may be formed long.

The crotch portion 6 is formed so as to be entirely concave inward, but the side flap 10C of the crotch portion 6 is formed so as to protrude slightly outward. Here, “outside” means a direction away from the longitudinal centerline of the main body 5.

A pair of left and right back side flaps 10A, 10A formed on the back side portion 7 are each provided with a pair of tape fasteners 12 arranged outside in the width direction of the absorber 4, and a pair of tape fasteners 12 are provided when worn. The tape fastener 12 is fixed to a target tape 13 provided on the abdominal side portion 7 of the back sheet 3.

In the longitudinal direction of the main body 5, a pair of elastic members 14, 14 are stretched from the base end to the end, that is, over the back part 7, the crotch part 6, and the abdomen part 8. .

The pair of elastic members 14 and 14 are arranged so as to protrude outwardly at the crotch part 6 so that the interval between them is the widest, and the distance between them at the abdominal part 8 and the back part 7 is the shortest. The elastic members 14 are overlapped with the absorber 4 and are stretched. In FIG. 1, by joining the side edges of the absorber 4 to the elastic members 14, the contraction force is suppressed by the rigidity of the absorber in the region where the elastic members 14 overlap the absorber 4. to contract the crotch side flaps 10 C of the crotch portion forming the leg gears <br/> users. The elastic members 14 and 14 have a different distance between the abdominal part 8 and the dorsal part 7 from the crotch part 6, but may displace either the abdominal part 8 or the dorsal part 7. .

The pair of elastic members 14, 14 are stretched at target positions with respect to the longitudinal center line of the main body 5, so that a good mounting state and appearance can be obtained.

The shape of the concave portion formed in the crotch portion 6 preferably has constricted portions 6A, 6A at both ends of the concave portion. The constricted portions 6A, 6A
4 and 14 are allowed to be displaced in the width direction, and the formation of the pocket portion is facilitated. Further, since the effective depth of the concave portion can be increased, the size of the diaper can be increased.

As shown in FIG. 3, the elastic members 14, 14 are preferably arranged continuously in an extended state between intersections (between X and Y) with the side edges of the absorber. Also,
The elastic members 14 and 14 are preferably arranged in a non-extended state between the intersection point and the end A and between the intersection Y and the end B. In particular, the elastic members 14 and 14 in the vicinity of the ends A and B are provided. 14
However, it is preferable to keep the non-extended state. In this case, the elastic members 14 do not need to have a constant elongation. As a method of extending such an elastic member only at a desired position to make it elastic, and disposing the rest as inelastic, a method of arranging the elastic member by controlling the elongation rate, an intermittently extending elastic A method of supplying and arranging members, a method of joining an elastic member to a desired position in a desired shape, precutting at a non-joined portion, and a method of applying a release agent to an adhesive at a portion to be made inelastic , Etc., and any method known in the art can be used.

The elastic members 14, 14 are bonded to the back sheet 3 and the top sheet 2 by means such as ultrasonic welding, heat welding, and bonding with an adhesive.

As the elastic members 14 on both sides of the main body 5, three thread rubbers are used in this embodiment. In this embodiment, it is preferable that the elongation rate of the inner thread rubber is higher than that of the outer thread rubber. By doing so, when the diaper is worn, the leg gathers have a planar shape and adhere to the wearer's crotch. In order to form a planar shape, a well-known inversion prevention means such as suppressing the inversion of the leg gather portion using an adhesive may be used. When such an inversion prevention means is used, the diaper can be quickly worn, and the leg gather surface is adhered to the wearer's crotch, so that the inside can be reliably and softly sealed.

When a three-dimensional gather is formed on the disposable diaper of this embodiment, the effect of preventing leakage is further improved. The three-dimensional gathers are made by extending from the outermost elastic member between the longitudinal center lines of the diaper and symmetrically with respect to the longitudinal center line of the diaper.

The elastic members 14 are not limited to thread-like elastic members, but may be tape-like elastic members or flat rubber. As the material of the elastic member, a material having a stress at the time of 150% elongation of 100 g or less is particularly preferable, and elastic fibers which absorb and contract water may be used.

Next, the operation of this embodiment will be described.

When the disposable diaper 1 is worn, the crotch portion 6 is applied to the wearer's crotch, and the back side flap 10A is extended to the abdomen. Then overlaid the back side flap 10 A ventral side flaps 10B of the front section 8 in West sides of the wearer, to wear bonded at any position of the respective tape fasteners 12, 12 ventral target tape 13.

Before the disposable diaper 1 is worn, as shown in FIG. 2, the elastic members 14, which are arranged in an extended state,
14 contracts in the longitudinal direction, and at this time, the main body 5 bends toward the top sheet 2 and deforms to conform to the shape of the wearer. Further, since the elastic members 14 and 14 are arranged in a curved manner, a contraction force acts in the width direction. As a result,
The back portion 7 and the abdominal portion 8 contract and substantially coincide with a straight line connecting the side edges of the absorber 4, and the pocket portion 16 is formed in a portion surrounded by the elastic members 14 and the side edge of the absorber 4. Form.

That is, as shown in FIG. 3, when the disposable diaper 1 is in the deployed state, the elastic members 14, 14 move toward a straight line connecting the intersections X, Y with the side edges of the absorber 4. F acts, and the side flap 10C of the crotch part 6 stands up at the same time as the main body 5 is curved, moves to the inside of the main body 5, and forms the pocket 16 shown in FIGS. At this time,
In FIG. 3, the elastic members 1 at the straight lines X, Y and the crotch 6
Assuming that a dimension between 4 and 14 is W ₂ , this W ₂ is a slack amount (depth) of the pocket 16. Therefore, the distance from the excretion point to the periphery can be increased as compared with a conventional diaper.

The pocket 16 has a function of projecting outward when worn, and holding urine and stool excreted by the wearer. Part or all of the retained excrement is absorbed by the absorber 4 arranged in the pocket 16.
Therefore, even when excrement is not instantaneously absorbed such as so-called sudden urine, the pocket 16 is effective because the excrement is gradually absorbed by the absorber while being held in the pocket portion.

The pocket 16 is preferably arranged so as to cover the excretion point. Therefore, the pocket portion with urine as the main point is formed at the center of the crotch portion 6 for women and toward the ventral portion 8 of the crotch portion 6 for men. The positions where such pockets 16 are formed depend on the elastic members 14 and 14.
It can be easily prepared by changing the arrangement shape.

Next, another embodiment of the present invention will be described with reference to FIG.

The disposable diaper 2 according to the embodiment shown in FIG.
1, the absorber 4 and the elastic members 14, 1
4 in that an auxiliary absorber 22 is provided between them and the other parts are substantially the same as those in the above-described embodiment. Description is omitted.

That is, a disposable diaper 2 according to another embodiment.
1 is an absorber 4 and elastic members 14 and 14 in the crotch 6
And an auxiliary absorber 22 made of the same material as the absorber 4.
Are arranged, and the auxiliary absorber 22 is positioned on the wall of the pocket when the pocket 16 is formed to improve the efficiency of excrement absorption.
Improves the leakage prevention effect.

A predetermined distance is provided between the auxiliary absorber 22 and the absorber 4, so that the auxiliary absorber 22 can move independently. Note that a slit is formed between the absorber 4 and the auxiliary absorber 22 so that the auxiliary absorber 22
May be secured independently of each other.

Further, a disposable diaper 21 of another embodiment is provided.
The pocket 16 is less likely to be crushed due to the rigidity of the auxiliary absorber 22, and even if the width of the absorber 4 in the crotch portion 6 is reduced to match the crotch width, there is no fear that the absorption capacity decreases.

The present invention is not limited to the embodiment described above.
Various modifications can be made without departing from the spirit of the present invention.

For example, the elastic members are arranged one by one along the longitudinal direction of the main body. However, the present invention is not limited to this, and the elastic members may be constituted by a plurality of elastic members.

[0046]

According to the absorbent article of the present invention, leakage of excrement can be prevented with a simple structure. According to the absorbent article of the present invention, the following effects are further exhibited. By forming a pocket portion having excrement accommodating properties in the crotch portion, a fluid solid such as loose stool is accommodated in the pocket portion and the state in which the absorbent article is held until the absorbent article is removed from the wearer. On the other hand, when sudden urine is not instantaneously absorbed, the urine is gradually absorbed by the absorber while being held in the pocket portion. Since the elastic member is arranged at a fixed distance from the absorber in the crotch, it is not affected by the rigidity of the absorber, and the absorbent article can be fitted following the movement of the wearer. it can. Moreover, in the waist region, it is possible to fit the wearer's body exactly. In accordance with the crotch width of the wearer, the hourglass-shaped absorber having a narrower width of the absorber at the crotch can provide a sufficient distance from the excretion point to the gather. Since it is a flat type absorbent article, it does not become bulky and has a beautiful appearance when worn. Since it is a flat-type absorbent article that does not require a special processing technique in the production process, it is excellent in high-speed production, and a folded size that is stable even during high-speed operation can be obtained. If the folded shape is good, the product is easily packaged in the interior and packing steps, and the display at the store is good.

[Brief description of the drawings]

FIG. 1 is a plan view showing a deployed state of a disposable diaper according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a natural state of the disposable diaper shown in FIG.

FIG. 3 is a plan view for explaining the operation of the disposable diaper shown in FIG.

4 is a cross-sectional view showing a disposable diaper shown in FIG. 1 in a worn state.

FIG. 5 is a plan view illustrating a disposable diaper according to another embodiment of the present invention.

FIG. 6 is a plan view showing a developed state of a conventional disposable diaper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 21 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 6 Crotch part 7 Back part 8 Abdominal part 14 Elastic member

Claims (5)

(57) [Claims] 1. A body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber located between the two sheets, wherein the body is placed under the crotch of the wearer when worn. It is divided into a crotch located, a ventral part located on the ventral side, and a dorsal part located on the dorsal side .
It extends outward in the width direction from both longitudinal edges of the absorber.
Side flap is formed, and the side flap is
Dorsal side flaps located on the sides and ventral side
Ventral side flap and inseam side flap located at the crotch
In the absorbent article divided into a wrap , a pair of elastic members are stretched on both sides in the longitudinal direction of the main body over the abdominal part, the crotch part and the back part,
And the pair of elastic members, intervals at which the crotch portion, the crotch at widely spaced than the ventral and dorsal
The crotch side is arranged in an extended state on the lower side flap.
By contracting the flap to form leg gathers
Then, the inseam side flaps stand on the top sheet side.
The leg gather and the inseam side flag
The elastic member forming the leg gather and the upper
An absorbent article, wherein a pocket portion is formed between a side edge of the absorbent body . Wherein said elastic member is absorbent article according to claim 1, in the front section and the rear section of the body, characterized in that it is stretched to overlap with the absorbent body. Wherein said pair of elastic members is provided with elastic rods each plurality of absorbent according to claim 1 or claim 2 expansion ratio of each linear elastic body are different from each other Goods. Wherein said absorbent body, the absorbent article according to any one of claims 1 to 3 crotch portion is characterized by a shape of narrower than the ventral and dorsal. 5. The absorbent article according to any one of claims 1 to 4, characterized in that the auxiliary absorbent body is provided between the absorbent body and the elastic member in the crotch portion .