JPH07116193A - Disposable diaper - Google Patents

Abstract

PURPOSE:To provide a disposable diaper having high wearability, wherein the rear face sheet made of low cost material is not broken when using the fastening tape. CONSTITUTION:A diaper comprises a front face sheet permeable to liquid, a rear face sheet impermeable to liquid, a main body having an absorber situated between said both sheets and a tape part having a fastening tape for fixing the diaper at wearing and a release tape for adhering the fastening tape. The fastening tape is fixedly adhered to rear face sheet at side edge part of the backward waist part of the disposable diaper. And there is provided pore part in the fixedly adhering part of the fastening tape at the rear face sheet and the fastening tape is fixedly adhered to members other than rear face sheet of the main body of the diaper through the pore part.

Description

Detailed Description of the Invention

[0001]

The present invention relates to infants, incontinent persons,
The present invention relates to a disposable diaper for adults, and more specifically, to a disposable diaper having excellent wearability and wearing feeling.

[0002]

2. Description of the Related Art A conventional disposable diaper, as shown in FIG.
2, flaps 18 on the left and right edges of the waist portion 15 'after the diaper formed by adhering the back sheet 13 and the waist barrier sheet 19 provided as necessary.
Etc., the adhesive is fixed to the back sheet 13 side.

In order to secure the strength of the adhesive fixing portion of the fastening tape (fastening tape attachment portion) so as not to be damaged during use of the diaper, the fastening tape attachment portion is used during the use of the diaper. When pulling 21, the pulling force is the back sheet 1
3 is sequentially transmitted to the surface sheet 12, and the entire flap 18 is pulled.

However, in the above conventional diaper, in order to secure the strength of the fastening tape attachment portion, the basis weight of the back sheet 13 must be increased, which increases the cost of the diaper and the wearability, There were problems such as poor wearing comfort. Further, in order to secure the above strength, it is possible to increase the adhesion area between the fastening tape 21 and the back sheet 13, but this is technically and economically limited.

In order to solve the above problems, various diapers having an improved fastening tape attachment portion have been proposed up to now, but none of them have sufficiently solved the above problems.

[0006] For example, in the disposable diaper disclosed in Japanese Examined Patent Publication No. S60-36481, in order to make the structure of the fastening tape economical, a through hole is provided in the flap and the fastening tape is also bonded to the release tape. Although it is fixed, in the disposable diaper, since the fastening tape cannot be adhered to the surface sheet or the waist barrier sheet in the attachment portion, these strengths cannot be utilized and the above problems cannot be solved. That is, in the disposable diaper, the tensile force from the fastening tape is only transmitted sequentially from the back sheet to the waist barrier sheet or the top sheet, similarly to the conventional one, so that the strength of the waist barrier sheet or the top sheet is increased. Could not be used effectively, and it was necessary to increase the basis weight of the back sheet after all.

Therefore, an object of the present invention is to provide a disposable diaper which is not damaged even when the fastening tape is operated even when a low-cost back sheet material is used and which is excellent in wearability and wearing feeling. To provide.

[0008]

Means for Solving the Problems As a result of various studies, the inventors of the present invention provided holes in a back sheet and fixedly fastened the fastening tape to constituent members of the diaper body other than the back sheet. The inventors have found that the above object can be achieved and completed the present invention.

That is, the present invention relates to a liquid-permeable surface sheet,
A diaper body including a liquid-impermeable back sheet and an absorbent body interposed between these sheets, a fastening tape for fixing the diaper at the time of wearing, and a release tape to which the fastening tape is adhered, In the disposable diaper having, the fastening tape is adhesively fixed to the back sheet at the side edge portion of the waist after the disposable diaper, and a hole is provided in the adhesive fixing portion of the fastening tape in the back sheet. The present invention provides a disposable diaper characterized in that the fastening tape is adhesively fixed to a member other than the backsheet of the diaper body via the hole.

[0010]

In the disposable diaper according to the present invention, since the fastening tape is adhered and fixed to a member other than the back sheet of the diaper body, the pulling force of the fastening tape is applied not only to the back sheet but also to the above member. The strength of the adhesive fixing portion of the fastening tape becomes stronger than that without the opening.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the accompanying drawings. FIG. 2 is a partially cutaway exploded view showing an embodiment of the disposable diaper of the present invention, and FIG. 3 is a sectional view taken along the line II ′ of the disposable diaper shown in FIG. 2. In addition, FIG.
FIG. 2 is a partially enlarged view of the flap of the diaper body shown in FIG.
5 is a cross-sectional view taken along the line II ′ of FIG.

The disposable diaper 1 of this embodiment shown in FIG.
Is a diaper body 11 having a liquid-permeable top sheet 12, a liquid-impermeable back sheet 13 and an absorber 14 interposed between these sheets, a fastening tape 21 for fixing the diaper at the time of wearing, and the fastening. Tape 2
1 is made to adhere, and the tape part 20 which consists of the release tape 22 is included. Then, as shown in FIG. 3, the fastening tape 21 is adhesively fixed to the back sheet 13 at the side edge portion of the waist portion 15 ′ after the disposable diaper 1, and the fastening tape in the back sheet 13 is provided. Adhesive fixing portion 31 of 21 (see FIG.
A hole 30 is provided in the waist barrier sheet 19, which is a member other than the back sheet 13 of the diaper body, through the hole 30.

More specifically, in the disposable diaper 1 of this embodiment, as shown in FIG. 2, the absorbent body 14 has a rectangular shape, and the topsheet 12 and the backsheet 13 have an hourglass shape in which the crotch region is twisted. The absorber 1 is formed into a curved shape.
4 is sandwiched between the top sheet 12 and the back sheet 13
It is fixed. Also, the waist part 1 before and after the above diaper
A waist barrier sheet 19 for preventing leakage from the front and rear waist portions of the diaper is provided on each of the parts 5 and 15 ', and is sandwiched and fixed by the top sheet 12 and the back sheet 13.

The front and rear waist portions 15 and 15 'and the leg portions 16 in the peripheral portion of the absorbent body 14 are worn by the wearer when wearing a diaper.
An elastic expansion / contraction member 17 for fitting the legs 16 to each other is provided by being fixed by the top sheet 12 and the back sheet 13.

The top sheet 12, back sheet 13, absorber 14 and waist barrier sheet 19 form a diaper body 11, and the top sheet 12, back sheet 13 and waist barrier sheet 19 are attached. An integral flap 18 is formed on the side edge of the rear waist portion 15 '.

The release tape 22 is composed of an adhesive surface 22a and a tape surface 22a, and is located at a position corresponding to the fastening tape 21 on both side edges of the rear waist portion 15 'on the surface sheet 12 side. The adhesive surface 22a is provided so as to adhere.

Further, a landing tape (not shown) is provided on the front waist portion 15 side of the back sheet 13 to fix the diaper by attaching the fastening tape 21 when the diaper is used.

Next, materials constituting each of the above members will be described. The surface sheet 12 is preferably a liquid-permeable sheet that allows excrement to permeate into the absorbent body and has a feeling similar to underwear. Examples of such a liquid-permeable sheet include woven cloth, nonwoven cloth, and porous material. A film or the like is preferable. In addition, a method of applying a hydrophobic compound such as a silicone oil or paraffin wax to the peripheral edge of the surface sheet 2 or a method of previously applying a hydrophilic compound such as an alkyl phosphate ester to the entire surface and washing the peripheral edge with warm water is performed. By applying a water repellent treatment, it is possible to prevent leakage due to bleeding of urine or the like at the peripheral edge.

The back sheet 13 is preferably a vapor-permeable, liquid-impermeable sheet that is permeable to vapor and is stretched by adding a filler to a thermoplastic resin, and preferably has a feel similar to that of underwear. As such a liquid impermeable sheet, for example, a composite material of a film and a non-woven fabric is preferably cited.

Further, the absorbent body 14 is preferably one in which a high molecular weight water-absorbing polymer mainly composed of defibrated pulp is used in combination, and a heat-treated mixture of a thermoplastic resin, cellulose fiber and a high molecular weight water-absorbing polymer is preferably used. preferable. The high-molecular water-absorbing polymer may be present in any of the upper layer, the middle layer and the lower layer of the absorbent body 14, or may be a mixture with pulp. Further, the high molecular weight water-absorbing polymer is preferably in the form of particles having a retention property capable of absorbing and retaining 20 times or more of its own weight and holding it, and having a gelling property. , For example,
Preferable examples include starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, crosslinked sodium carboxymethyl cellulose, acrylic acid (salt) polymers and the like.

The elastic elastic member 17 is made of rubber thread.
Preferred examples include flat rubber, film type rubber, and film-like polyurethane foam, and the one having a stress of 40 to 100 g at 150% elongation is preferred.

The waist barrier sheet 19 is preferably a polyethylene sheet which is liquid impermeable, vapor permeable to vapor, flexible and strong in the width direction.

The characteristic parts of the disposable diaper 1 of this embodiment will be described in detail below. As shown in FIG.
The fastening tape 21 is composed of an adhesive surface 21a and a tape surface 21b. At the edge of the flap 18, the adhesive surface 21a is adhered to the back sheet 13,
It is adhesively fixed to the back sheet 13. Also, FIG.
And, as shown in FIG. 5, an adhesive fixing portion 31 for adhesively fixing the fastening tape 21 in the back sheet 13.
Is provided with a plurality of circular holes 30, and the adhesive surface 21a of the fastening tape 21 is provided on the holes 3
Waist barrier sheet 1 which is also a member of the diaper body 11 other than the back sheet, with the fastening tape 21 being adhered to the waist barrier sheet 19 via
It is also adhesively fixed to 9.

The shape of the hole 30 is preferably the circular shape described above, and the size thereof is 2 to 10 m in diameter.
It is preferable that m and the occupied area are 20 to 60% of the adhesive fixing area of the fastening tape.

As in this embodiment, the fastening tape 21
However, since it is also adhesively fixed to the waist barrier sheet 19 which is a member other than the back sheet 13 in the diaper body 11 through the hole portion 30, the pulling force when pulling the fastening tape 21 is set to the waist. By directly transmitting to the barrier sheet 19, the member strengths of the back sheet 13 and the waist barrier sheet 19 can be effectively and effectively contributed as the tensile strength of the fastening tape 21. As a result, sufficient tensile strength can be obtained even when the back sheet 13 is made of a material having a small basis weight. Therefore, the disposable diaper 1 of the present embodiment can reduce the basis weight of the back sheet 13 and is therefore low in cost and excellent in wearability and wearing feeling.

Although not particularly shown here, in the disposable diaper of the present invention, the body of the diaper may be composed of only the top sheet, the back sheet and the absorber. In this case, the fastening tape is It will also be adhesively fixed to the topsheet via the holes. At this time, it is preferable that the surface sheet is made of a non-woven fabric.

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

[0028]

INDUSTRIAL APPLICABILITY The disposable diaper of the present invention does not suffer damage to the back sheet during operation of the fastening tape even when a low-cost back sheet material is used, and has excellent wearability and wearing comfort. is there.

[Brief description of drawings]

FIG. 1 is a sectional view showing an adhesive fixing portion of a fastening tape of a conventional disposable diaper.

FIG. 2 is a perspective view showing an embodiment of the disposable diaper of the present invention.

FIG. 3 is a sectional view of the disposable diaper shown in FIG.
FIG.

FIG. 4 is a partially enlarged view of the flap of the diaper body shown in FIG.

5 is a cross-sectional view taken along the line I-I 'of FIG.

[Explanation of symbols]

 1 Disposable diapers 11 Diaper main body 12 Top sheet 13 Back sheet 14 Absorber 15 Front waist 15 'After waist 16 Legs 17 Elastic members 18 Flap 19 Waist barrier sheet 21 Fastening tape 22 Release tape 30 Holes 31 Adhesive fixing part

Claims (4)

[Claims] 1. A diaper body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body interposed between these sheets, a fastening tape for fixing the diaper at the time of wearing, and the fastening tape. In a disposable diaper having a tape portion including a release tape to be adhered, the fastening tape is adhesively fixed to the back sheet at the side edge of the waist portion after the disposable diaper, and the back sheet A hole is provided in the adhesive fixing portion of the fastening tape in, and the fastening tape is also adhesively fixed to a member other than the back sheet of the diaper body through the hole. . 2. The disposable diaper according to claim 1, wherein the member other than the back sheet is the top sheet, and the top sheet is made of non-woven fabric. 3. The disposable diaper according to claim 1, wherein the member other than the backsheet is a waist barrier sheet provided between the topsheet and the backsheet. 4. The disposable diaper according to claim 1, wherein the hole has a circular shape and a plurality of holes are provided.