JPH08112309A - Shorts type disposable diaper - Google Patents

Abstract

PURPOSE: To provide a shorts type disposable diaper which does not slip off and does not cause leakage even if the weight of excrement is applied thereon by arranging the spacings between plural elastic members in the circumferential part of a carcass so as to make the spacings narrower toward a waist aperture and setting the elongation rate of the elastic members in the circumferential part of the carcass higher nearer the waist aperture. CONSTITUTION: A waist aperture 10 formed by joining and fixing of respective both side edges of a belly side part 6 existing on the belly side of the wearing person of an absorptive body 5 and a dorsum side part 7 existing on the dorsum side and a pair of leg apertures 20 are provided with the elastic members 11, 21 forming the gathers substantially continuous with the entire circumference of the peripheral edges. The circumferential part 30 of the carcass arranged with the absorbent 4 is provided with the plural elastic members 31 forming the gathers substantially continuous with the entire circumference thereof. The plural elastic members 31 are so arranged in the circumferential part 30 of the carcass that the spacings between the respective elastic members 31 are narrower toward the waist aperture 10. The elongation rate of the elastic members 31 is set higher nearer the waist aperture 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-type disposable diaper for infants, adults or incontinence, or training pants, and more particularly, it has excellent fit and can reliably prevent leakage when worn. The present invention relates to pants-type disposable diapers.

[0002]

2. Description of the Related Art Heretofore, various pants-type disposable diapers having a waist opening and a pair of leg openings have been proposed, and recently, in JP-A-4-166150. , A plurality of elastic members which are located between the waist opening and the pair of leg openings, and which form a gather that is substantially continuous over the entire circumference in the body peripheral portion where the absorber is arranged. A pants-type disposable diaper provided with is proposed. The pants-type disposable diaper proposed in the above publication is one in which the body peripheral portion of the diaper can be fitted to the wearer well by the elastic member of the body peripheral portion, and excretion from the diaper when worn. It is possible to reliably prevent the leakage of objects.

However, recently, there has been a demand for a disposable diaper having further improved leakproofness than the above-mentioned disposable diaper. That is, even in the above-mentioned pants-type disposable diaper, when the wearer excretes, the disposable diaper may be displaced due to the weight of the excrement, and the excrement may leak, so that even when the wearer excretes it. Recently, there has been a demand for a pants-type disposable diaper that does not cause slippage and does not leak. In addition, if the expansion / contraction rate of the elastic member such as the waist portion is excessively increased in order to prevent such a shift, the wearer is subjected to extra pressure, and the wearing feeling is significantly reduced. Further, Japanese Patent Laid-Open No. 4-371148 proposes a pants-type disposable diaper in which the elastic members around the waist are arranged so that the intervals between the elastic members do not become narrower toward the waist opening. However, the diaper also did not completely satisfy the above requirements.

Therefore, an object of the present invention is to provide a pant-type disposable diaper excellent in fit which does not cause a slippage without causing a slip even when the wearer excretes the weight of the excrement without impairing the wearing comfort. To provide.

[0005]

As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention have narrowed the elastic members at the waist circumference as the distance between them approaches the waist opening and extend them. It has been found that a pants-type disposable diaper whose rate increases as it approaches the waist opening can achieve the above object.

The present invention has been made on the basis of the above findings, and is an absorbent having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these sheets. A waist opening and a pair of leg openings are formed by joining and fixing both side edges of the abdominal part located on the ventral side of the wearer and the back side part located on the back side of the absorbent main body. The waist opening and the pair of leg openings are each provided with an elastic member that forms a gather that is substantially continuous over the entire periphery of the waist opening and the pair of leg openings. The pants having a plurality of elastic members forming a substantially continuous gather over the entire circumference in the body peripheral portion between the leg openings and in which the absorber is arranged. Type In the diaper, the plurality of elastic members provided in the waist portion are arranged such that the intervals between the elastic members become narrower as they approach the waist opening, and the elastic member in the waist portion is It is intended to provide a pants-type disposable diaper, which is characterized in that its extension rate becomes higher as it approaches the waist opening.

[0007]

In the pants-type disposable diaper of the present invention, the distance between the elastic members around the waist is narrowed toward the waist opening, and the expansion rate of the elastic member is increased toward the waist opening. , Gathers are densely introduced in a part of the diaper that easily changes following the movement of the wearer, and loose gathers are introduced in a part that does not change much. As a result, the fit can be improved without impairing the feeling of wearing, and even when the wearer excretes, the diaper does not shift, and as a result, excrement does not leak.

[0008]

EXAMPLES The absorbent article of the present invention will be described in more detail below with reference to examples. An embodiment of the pants-type disposable diaper of the present invention will be described with reference to FIGS. 1 and 2.
Here, FIG. 1 shows a pants-type disposable diaper 1 of the present invention.
FIG. 2 is a perspective view showing an embodiment, and FIG. 2 is a development view of the pants-type disposable diaper shown in FIG. 1.

The pants-type disposable diaper 1 of this embodiment shown in FIGS. 1 and 2 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body arranged between these sheets. 4 and an absorptive main body 5 having the absorptive main body 4, and the waist is formed by joining and fixing both side edges of the abdominal side portion 6 located on the abdominal side of the wearer and the back side portion 7 located on the back side of the absorbent main body 5. Opening 10 and a pair of leg openings 20
The waist opening 10 and the pair of leg openings 20 each have an elastic member 1 that forms a gather that is substantially continuous over the entire circumference.
1, 21 are provided between the waist opening 10 and the pair of leg openings 20.
A plurality of elastic members 3 forming a gather that is substantially continuous over the entire circumference of the body peripheral portion 30 where
1 is provided.

More specifically, in the pants-type disposable diaper 1, the side edge portion 6a of the abdominal side portion 6 and the side edge portion 7a of the back side portion 7 and the side edge portion 6b of the abdominal side portion 6 and the back side portion. The side edge portions 7b of 7 are joined and fixed to each other to form a joint portion 8.

Further, the top sheet 2, the back sheet 3 and the absorber 4 are each formed in an hourglass shape with the center constricted, and as the material for forming these, the following materials are used. it can.

The material for the top sheet 2 is preferably a liquid-permeable sheet that allows excrement to permeate into the absorbent body 4 and has a feeling close to that of underwear. Examples of such a liquid-permeable sheet include woven fabrics. Preferable examples include cloth, non-woven fabric, and porous film. Further, the top sheet 2 is coated with a hydrophobic compound such as a silicone oil or paraffin wax on the peripheral portion thereof, or a hydrophilic compound such as an alkyl phosphate ester is coated on the entire surface in advance, and then the peripheral portion thereof is coated. Water-repellent treatment is performed by a method of washing the water with warm water to prevent leakage due to bleeding of urine or the like in the peripheral portion.

As the material for the back sheet 3, a liquid-impermeable and vapor-permeable sheet which is obtained by adding a filler to a thermoplastic resin and is stretched is used. A composite material of a film and a non-woven fabric, a composite material of a film and a woven fabric, or the like is used.

As the material of the absorbent body 4, it is preferable to use defibrated pulp as a main material together with a high-molecular water-absorbing polymer, and to heat-treat other thermoplastic resin, cellulose fiber, or a mixture of high-molecular water-absorbing polymer. Is preferred. The high-molecular water-absorbing polymer may be present in any of the upper layer, the middle layer, and the lower layer, or may be a mixture with pulp. The high-molecular water-absorbing polymer is preferably in the form of particles having a property of absorbing and retaining a liquid of 20 times or more its own weight and having a gelling property. Examples of such a high-molecular water-absorbing polymer include starch-acrylic acid. A saponified product of a (salt) graft copolymer, a crosslinked product of sodium carboxymethyl cellulose, an acrylic acid (salt) polymer and the like are preferable.

The elastic members 11 provided in the waist opening 10 are provided in the abdominal side portion 6 and the dorsal side portion 7 at four equal intervals, and are connected by the joining and fixing, A gather that is substantially continuous is formed over the entire circumference of the waist opening 10. The elastic member 11 can be used without particular limitation as long as it is an elastic member usually used in disposable diapers, but the shape thereof is preferably a band shape. Also,
The elongation rate is preferably in the range of 80% to 140%. In the present invention, the above "extension rate" means an extension rate of 100%, for example, a length of 10 cm is 20 cm,
That is, it is defined as extending to double the length. In addition, 3 of the elastic member 11 of the waist opening 10
The stress at 0% elongation is preferably 50 to 150 g.

The elastic members 21 provided in the leg openings 20 have three absorbent members 4 in the abdominal part 6 and three in the back part 7 at equal intervals and at the crotch portion of the diaper. It is provided so as to traverse, and is connected by the above-mentioned joining and fixing so as to form a gather that is substantially continuous over the entire circumference of the leg opening 20. The elastic member 21 can be used without particular limitation as long as it is an elastic member usually used in disposable diapers, but the shape thereof is preferably a band shape.
Further, the elongation rate is preferably in the range of 60% to 100%. In addition, the elastic member 2 of the leg opening 20.
It is preferable that the application of 1 at 30% elongation is 40 to 100 g.

Also, the back sheet 3 of the back side portion 7
A fastening tape 60 for disposal is provided on the surface, and the fastening tape 60 can sanitarily dispose of the diaper when disposing of the diaper. Further, as the joining method of the joining portion 8, heat sealing,
A known joining method such as high-frequency sheets and ultrasonic sealing can be used without particular limitation.

Further, as shown in FIGS. 1 and 2, the pants-type disposable diaper of this embodiment has a urination point portion 40 which is located under the waist circumference portion 30 and near the wearer's urine portion. Is provided with a plurality of elastic members 41 forming a continuous gather in the width direction of the diaper, and specifically, four elastic members 41 are provided on the abdominal portion 6 at equal intervals. Here, the "near the urinating part" means a part located in the urinary part itself and its periphery when the wearer wears the diaper, and specifically, between the pair of leg openings 20. It refers to the crotch region of the ventral side 6 that is located. The elastic member can be used without particular limitation as long as it is an elastic member usually used in disposable diapers, but the shape thereof is preferably a thread shape. Further, the elongation rate and the stress at the time of 30% elongation can be appropriately selected within a range capable of supporting the weight increase after urination.

The plurality of elastic members 31 provided on the waist portion 30 are arranged such that the intervals between the elastic members 31 become narrower as they approach the waist opening 10. The elastic member 31 of the waist portion 30 has a higher extension rate as it approaches the waist opening 10. Further, the elastic members 31 provided in the body peripheral portion 30 are provided in the abdominal side portion 6 and the backside portion 7, respectively, five each, and are connected by the joining and fixing,
A gather that is substantially continuous is formed over the entire circumference of the body peripheral portion 30.

As the elastic member 31, any elastic member generally used in a disposable diaper can be used without particular limitation, but it is preferable that the shape thereof is a thread shape. The extension rate is preferably in the range of 80% to 120%.

The intervals L ₁ , L ₂ , L of the elastic member 31
The relationship of ₃ L ₄ (see FIG. 2) is L ₁ : L ₂ : L ₃ L ₄ =
1: 1.0-1.5: 1.5-2.0: 2.0-2.5
It is preferably within the range. Further, it is preferable that the elongation rate be increased by 5 to 15% from the elastic member closest to the crotch toward the waist opening 10.

The stress at the time of 30% expansion of the elastic member 31a on the waist opening 10 side in the waist portion 30 is 50 to 150 g, further 50 to 100 g, and the leg opening in the waist portion 30 is shown. The stress at the time of 30% extension of the elastic member 31e on the part 20 side is preferably 40 to 100 g.

In the disposable diaper, the ratio of rise length to width (rise length / width) is 1.10 to 1.30.
Is more preferable, and it is more preferable that it is 1.15 to 1.30. If the above ratio is less than 1.10, the navel will be uncovered, the baby's body will not be covered, and abdominal leakage will occur. When it exceeds 1.30, the fit property is deteriorated,
It is preferable that the amount falls within the above range because the deviation easily occurs. Here, the "rise length" is the length from the edge portion of the crotch portion of the diaper to the edge portion of the waist opening 10 in a state where all the elastic members described above are completely extended. The "width" is the length between the left and right side edges of the diaper when all the elastic members described above are completely extended.

The pants-type disposable diaper of this embodiment is provided such that the distance between the elastic members at the waist circumference becomes narrower as the elastic members get closer to the waist opening 10, and the expansion rate is increased. Since the height is higher as it approaches the waist opening 10, the fit of the entire diaper is excellent, and even if the wearer excretes such as urine and the weight of the excrement is added, the diaper does not slip, As a result, the leakage can be effectively prevented, and further, the wearer does not feel extra pressure and is excellent in wearing feeling.

The pants-type disposable diaper of the present invention is
The present invention is not limited to the above-described embodiment, and for example,
The elastic member of the waist opening portion 10 and the elastic member of the urination point portion 40 also have the same configuration as the elastic member of the waist circumference portion (the distance between the elastic members is narrowed toward the waist opening portion 10, and It is also possible to adopt a configuration in which the extension rate is high).

[0026]

Industrial Applicability The pants-type disposable diaper of the present invention has an excellent fit property without damaging the feeling of wearing and preventing leakage even if the wearer excretes and the weight of the excrement is applied. It is a thing.

[Brief description of drawings]

FIG. 1 shows a pants-type disposable diaper 1 according to the present invention.
It is a perspective view showing an example.

2 is a development view of the pants-type disposable diaper shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Disposable diapers 2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent body 6 Abdominal part 6a Abdominal side edge 6b Abdominal side edge 7 Dorsal side 7a Dorsal side edge 7b Dorsal Side edge part of side part 8 Joint part 10 Waist opening part 11 Elastic member 20 Leg opening part 21 Elastic member 30 Body circumference part 31 Elastic member 40 Urination point part 41 Elastic member

Claims (1)

[Claims] 1. An absorbent main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between these sheets, and the belly of the wearer in the absorbent main body. A waist opening and a pair of leg openings are formed by joining and fixing both side edge portions of the ventral side portion located on the side and the back side portion located on the back side, and the waist opening portion and the pair of leg portions are formed. The opening is provided with an elastic member that forms a gather that is substantially continuous over the entire circumference of the opening, and is located between the waist opening and the pair of leg openings. In a pants-type disposable diaper in which a plurality of elastic members forming a substantially continuous gather are provided on the circumference of the body around which the body is arranged, the pants-type disposable diaper is provided on the circumference of the body. Are The number of the elastic member,
The elastic members are arranged such that the distance between the elastic members becomes narrower toward the waist opening, and the elastic member at the waist circumference portion has a higher expansion rate as it approaches the waist opening. Pants type disposable diaper.