JP2000279448A - Throw-away diaper of shorts type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a throw-away diaper of a shorts type having easily disposable stretchable side panels. SOLUTION: This throw-away diaper has a main body 10 including a liquid permeable front surface sheet 11, a liquid impermeable rear surface sheet 12 and an absorber interposed between both sheets. The main body 10 is segmented to an abdomen side part which exists on the rear side of a wearing person at the time of wearing, a back side part existing on a back side and a crotch part. The stretchable side panels 20 are joined and fixed to respective both right and left sides of the abdomen side and the back side. The stretchable side panels on the abdomen side and the stretchable side panels on the back side are joined and fixed, by which a waist aperture 15 and a pair of right and left leg apertures 16 are formed. Elastic materials 23 are arranged near D the waist aperture in the abdomen side part and the back side part. The back side part is provided with disposable tapes 30 on the surface of the rear surface sheet 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable diapers for infants, incontinent persons and adults.

[0002]

2. Description of the Related Art Generally, a disposable diaper is of a flat type and usually has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent sheet interposed between these two sheets. The body is composed of a vertically long body including a body, and the body is divided into an abdominal part located on the abdominal side of the wearer and a dorsal part located on the back side when worn.

Recently, as the above-mentioned disposable diaper, for example, a pair of left and right side flaps formed on both sides along the longitudinal direction of the main body are used to join and fix the abdominal part and the dorsal part to each other. A so-called pants-type disposable diaper having a pair of leg openings and one waist opening has been proposed (JP-A-61-20).
No. 7605).

The above-mentioned underpants-type disposable diaper has a pair of left and right leg openings formed so as to be extendable and contractable so as to fit the body shape, and is usually worn by the wearer himself. It has been used for toilet training to promote "diaper valley" for infants, or for incontinent or ambulatory adults. In addition, the above-mentioned underpants type disposable diaper is compared with a so-called flat type diaper,
It is characterized by the fact that the wearer can raise and lower himself as in ordinary underwear. However, in order to prevent the wearer from getting excrement and to be able to wear it easily, the pants-type disposable diaper needs to have an excellent fitting property. It is also required to have sufficient followability.

To cope with such a demand, Japanese Patent Laid-Open No.
Japanese Patent No. 4364 discloses a stretchable side panel (side member) on a side portion for bonding the abdominal part and the back part of the main body.
And a pants-type disposable diaper in which an elastic member is disposed at an abdominal end and a back end of a main body has been proposed.

However, in the pants-type disposable diaper proposed in the above-mentioned Japanese Patent Application Laid-Open No. 2-4364, the side panel is a single member, and the elastic properties of each member are the same. In order to prevent and improve the fit, the tightening force must be increased, which gives the wearer an unnecessary feeling of pressure, and further impairs the ease of attachment and detachment. This also causes a problem that the feeling of oppression concentrates on both sides of the waist and the wearer's skin becomes red. In addition, the stress is most concentrated by the side panel at the time of wearing because it is mainly around the counterbore, the waist part is relatively loose, it slips off due to the weight due to activity and urination and defecation, and the crotch part also loosens and leaks easily Problem. For this reason, a type of diaper that has been designed to prevent leakage by providing three-dimensional gathers at the crotch has been proposed, but in actuality when the waist part becomes relatively loose due to changes in body position due to infant activities, etc. There is a problem in that urine leaks from a gap created between the diaper and the body as the diaper slips down.

Further, the pants-type disposable diapers having the side panels as described above tend to be relatively difficult for children to wear by themselves. Further, in the conventional pants-type disposable diaper, since the elastic member at the waist portion is only at the waist opening, the gather formed by the elastic member is not continuous with the side panel, and the wearer and the diaper at the waist portion may not be connected to each other. There may be gaps between them. For this reason, the elastic member does not expand and contract sufficiently, or the diaper does not fit around the wearer's waist, thereby excrement leaks from the gap between the wearer and the diaper, and the followability to the activity of the wearer, There is a problem that diapers slip down.

Accordingly, it is an object of the present invention to provide an
An object of the present invention is to provide a pants-type disposable diaper having elastic side panels.

[0009]

According to the present invention, there is provided a disposable diaper having a main body including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets. The body is divided into an abdominal part located on the abdominal side of the wearer when worn, a dorsal part located on the back side, and a crotch part, and the left and right sides of the abdominal part and the dorsal part, respectively. An elastic side panel is joined and fixed to the side edge, and the elastic side panel on the abdominal side and the elastic side panel on the back side are joined and fixed to form a waist opening and a pair of left and right leg openings. Part is formed,
An elastic member is disposed in the vicinity of the waist opening in the abdomen and the back, and a waste tape is provided on the surface of the back sheet substantially in the center of the back. The object has been achieved by providing a pants-type disposable diaper characterized by the following.

[0010]

The pants-type disposable diaper according to the present invention has elastic side panels, and elastic members are provided near the waist opening and around the waist, so that the pants-type disposable diaper substantially covers the entire circumference of the waist around during wearing. A continuous gather is formed. Therefore, it is possible to individually prevent the leakage and the slipping without pressing the wearer by individually fitting each body part according to the body shape of the wearer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of the pants-type disposable diaper according to the present invention, and FIG. 2 is a partially exploded development view of the disposable diaper shown in FIG.

As shown in FIGS. 1 and 2, the disposable diaper 1 of this embodiment has a liquid-permeable top sheet 11, a liquid-impermeable back sheet 12, and an absorber interposed between the two sheets. 13 is provided. The main body 10 is located on the abdominal side of the wearer when worn.
And a back part A located on the back side and a crotch part B, and elastic side panels 20, 20 'are provided on both left and right side edges of the abdomen part C and the back part A, respectively. The elastic side panel 20 of the abdominal part C and the elastic side panel 20 'of the back part A are joined and fixed, and the waist opening 15 and the pair of left and right leg openings 17 are fixed. , 17 'are formed, and the abdominal part C
And a waist elastic member 23, 23 'and a waist elastic member 21, in the vicinity D of the waist opening and in the waist part E located around the wearer's waist when worn on the back part A.
21 'is disposed, and a gather is formed in which the abdominal part C and the back part A are substantially continuous over the entire periphery of the diaper via the elastic side panels 20, 20'. .

More specifically, the absorber 13
Has a rectangular shape and is sandwiched and fixed between the top sheet 11 and the back sheet 12. A band-shaped leg elastic member 2 is provided on the longitudinal side of the absorber 13.
2, 22 'are the top sheet 11 and the back sheet 12
The elastic members 22 and 22 'are contracted in a free state to form leg gathers as shown in FIG. 1 so as to fit in the crotch region.

Next, materials and the like of each constituent member of the disposable diaper according to the present embodiment will be described. Top sheet 1
1 is a liquid-permeable sheet that allows excrement to permeate into the absorber 13 and preferably has a feeling similar to underwear. Examples of such a liquid-permeable sheet include woven fabric, nonwoven fabric, and porous film. Used.

As the back sheet 12, a liquid impermeable and vapor permeable film sheet or a fiber aggregate obtained by adding a filler to a thermoplastic resin is used.

The absorbent 13 is preferably composed mainly of fibrillated pulp and combined with a high-molecular-weight water-absorbing polymer. In addition, a heat-treated mixture of a thermoplastic resin, cellulose fiber, or a high-molecular-weight water-absorbing polymer is used. Are preferably used. The location of the high-molecular-weight water-absorbing polymer may be any of the upper layer, the middle layer, and the lower layer of the absorber, or may be a mixture with pulp. The high-molecular water-absorbing polymer has a performance of absorbing a liquid at least 20 times its own weight, and is preferably in the form of particles having a gelling property,
Preferred examples of such a high-molecular water-absorbing polymer include a saponified starch-acrylic acid (salt) graft copolymer, a crosslinked sodium carboxymethyl cellulose, and an acrylic acid (salt) polymer.

As the leg elastic members 22 and 22 ', elastic members made of natural rubber, synthetic rubber, foamed polyurethane or the like can be used without particular limitation. Further, in the present embodiment, the example using the belt-like body has been described. However, one or more thread-like elastic bodies may be provided.

The back side A is provided with a waste tape 30 on the surface of the back sheet 12 at a substantially central portion thereof. As the waste tape 30, a tape obtained by applying a pressure-sensitive adhesive to a normal tape material is preferably used. As the pressure-sensitive adhesive, a normal pressure-sensitive adhesive such as a styrene-butadiene block copolymer or a styrene-isoprene block copolymer is used. And hot melt resins or emulsions such as acrylic esters, acrylic copolymers, vinyl acetate, and ethylene-vinyl acetate copolymers. Further, as the waste tape 30, a tape made of a tape material that is joined to the tape-attached area by a physical structure such as a magic tape may be used. Since the disposal tape 30 is provided, the diaper body can be rolled after defecation and the like, and can be compacted and disposed of with the disposal tape 12, and the defecation can be confined in the diaper body for sanitary use. It can be processed and is easy to dispose of.

The features of the disposable diaper according to the present embodiment will now be described. As shown in FIG.
0 is divided into an abdominal part C located on the abdominal side of the wearer when worn, a dorsal part A located on the back side, and a crotch part B, and the abdominal part C and the dorsal part A are divided. Stretchable side panels 20, 20 'are joined and fixed to both left and right side edges. Bonding of the elastic side panels 20, 20 'to the side edges may be performed by heat sealing, ultrasonic sealing, adhesive sealing or any other suitable means.

As shown in FIG. 1, the elastic side panels 20, 20 of the abdominal part C and the elastic side panels 20 ', 20' of the back part A are respectively connected to the elastic side panel 20. And the side sheet of the elastic side panel 20 'is in contact with the top sheet 11 of the elastic side panel 20' so that the waist opening 15 and the pair of left and right legs are fixed. Openings 17, 17 'are formed. Reference numeral 31 denotes a band-shaped seal portion formed by the above-described bonding and fixing. Further, the above-mentioned bonding and fixing can be performed by heat sealing, ultrasonic sealing, bonding with an adhesive, or some other appropriate means.

Further, in the vicinity D of the waist opening in the abdominal part C and the back part A, band-shaped waist elastic members 23, 23 'are provided at the edges of the waist opening, that is, the front and rear waist parts 14. , 14 ′, and the waist portion E has thread-shaped waist elastic members 21, 21.
4 are arranged on the abdominal part C and the dorsal part A, respectively, so as to be sandwiched between the back sheet 12 and the absorber 13 in parallel with the front and rear waist parts 14, 14 '. ing. Since the waist elastic members 21 and 21 'and the waist elastic members 23 and 23' are arranged, the abdominal part C and the back part A are arranged via the elastic side panels 20 and 20 '. Around the entire periphery of the diaper, that is, on the outer peripheral surface of the portion of the pants-type disposable diaper that contacts the waist and waist of the wearer (the surface of the back sheet 12 mainly including the waist opening D and the waist E). A substantially continuous gather is formed.

The elastic side panel 20.2
0 ′ is a single-layer woven fabric, non-woven elastic material or stretchable material such as block copolymer of polystyrene, polyisoprene or polybutadiene, copolymer of ethylene, natural rubber, urethane, and a mixture / coextrusion thereof. An elastic material, a film of an elastic material, or a composite of an elastic material can be used. Furthermore,
Stretch bonded laminates that are elastic in all directions, breathable, and vapor permeable and liquid impermeable can also be used. The laminated material is desirably a melt-blown material or a film of a block or graft copolymer such as a stretchable material such as butadiene, isoprene, styrene, ethyl-ethylene acrylate or a mixture thereof, and a urethane spun-bonded nonwoven fabric. Alternatively, the elastic or stretchable layer is stretched to a certain elongation, the unstretched layer is placed on the stretched elastic layer, these layers are bonded together, and the elastic layer gathers the other layers. Preferred are those made by relaxing the layers as described above. The stretchable side panels 20 and 20 ′ are made of a stretchable and breathable film in a non-stretched state, and a vertically carded fiber web is heat-sealed from above and below in the longitudinal direction. A laminated material formed by joining linearly with a joining means such as a seal or an adhesive can be used. This type is
When the mother or the child spreads the fiber web once in the lateral direction at the time of use, the fibrous web in the non-wire-joined portion is broken and loosened, and gathers.

The waist elastic members 21 and
As the material forming the 1 ′ and the waist elastic members 23, 23 ′, the same material as the elastic body forming the leg elastic members 22, 22 ′ can be used.

In the disposable diaper according to the present invention, the waist elastic member in the vicinity of the waist opening and the waist elastic member of the waist portion have different contraction stresses, and the stress at 50% elongation is different. It is preferable to have a relationship of waist opening> waist circumference. Furthermore, in the disposable diaper of the present invention, the waist opening has a 50-degree portion between the back side and the abdomen.
It is preferable that the stress at the time of% elongation differs. Specifically, the contraction stress of the elastic member near the waist opening is set to 1
Stress at 20% to 200% elongation is preferably 30 g / 2
5 mm width to 300 g / 25 mm width, more preferably 1
The width is preferably in the range of 00 g / 25 mm to 200 g / 25 mm, and the contraction stress of the elastic member in the waist portion is desirably smaller than the contraction stress of the elastic member in the waist opening.

In order to manufacture the disposable diaper of this embodiment, it is possible to easily prepare the disposable diaper by arranging the constituent members at predetermined portions by a generally known method.

Next, another embodiment of the pants-type disposable diaper according to the present invention will be described with reference to FIGS. 3, 4, 5 and 6. FIG. The points that are not particularly described are the same as in the above-described embodiment. FIG. 3 is a development view (corresponding to FIG. 2) showing another embodiment of the pants-type disposable diaper of the present invention, and FIGS. 4, 5 and 6 show the pants-type disposable diaper of the present invention. A development view showing another embodiment (FIG. 2)
FIG.

The disposable diaper 1a shown in FIG. 3 has waist elastic members 23a and 23a 'near the waist opening D.
Are thread-shaped, three at a time, at predetermined intervals, and at the edge of the waist opening 15a, ie, the front and rear waist portions 1
4a, 14a '. When the waist elastic members 23a and 23a 'and the waist elastic members 21a and 21a' are formed using a plurality of elastic materials as described above, the numbers are not particularly limited.

The disposable diaper 1b shown in FIG. 4 has waist elastic members 23b and 23b 'near the waist opening D.
Are thread-shaped, three by three, at a predetermined interval and at the edge of the waist opening 15b, ie, the front and rear waist portions 1
4b, 14b 'are disposed substantially parallel to each other, and the waist elastic members 21b, 21b' of the waist E are provided.
Are arranged so as to form a loop with each other. Thus, the disposable diaper 1b of the present embodiment is
Since the elastic members 21b and 21b 'of the waist portion E are arranged so as to form a loop with each other, the fit in the waist portion can be further improved.

The disposable diapers 1c and 1d shown in FIGS. 5 and 6 are respectively provided with elastic side panels 20c and 20c.
20c ′, 20d and 20d ′ are formed by non-stretchable portions 24c and 24d formed by non-stretchable members and stretchable portions 25c and 25d formed by stretchable members. Since it is adopted, it is possible to disperse the stress concentration in the underbody.

In the above embodiment, the loop has a rectangular shape as an example. However, the shape of the loop is not limited to this, and various shapes such as a circle and an ellipse can be used. . Further, the elastic side panel is formed by sandwiching elastic members such as thermoplastic urethane or olefin-based foamed elastomer with non-elastic members such as nonwoven fabric from above and below in the thickness direction, and then joining the non-elastic members. To
It is also possible to use a stretchable side panel which is formed by slitting in the vertical direction of the diaper and which expands and contracts in the horizontal direction.

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

[0032]

The disposable diaper according to the present invention is excellent in the fitting property of the waist portion and the slip-preventing property and the leak-proof property of the excrement. It can be easily performed while standing or standing, and furthermore, it is possible to adjust the size according to the physique of the wearer, and when a disposal tape is provided, disposal after defecation or the like can be facilitated.

[Brief description of the drawings]

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

FIG. 2 is a partially exploded development view of the disposable diaper shown in FIG.

FIG. 3 is a developed view (corresponding to FIG. 2) showing another embodiment of the pants-type disposable diaper of the present invention.

FIG. 4 is a developed view (corresponding to FIG. 2) showing still another embodiment of the pants-type disposable diaper of the present invention.

FIG. 5 is a developed view (corresponding to FIG. 2) showing still another embodiment of the pants-type disposable diaper of the present invention.

FIG. 6 is a developed view (corresponding to FIG. 2) showing still another embodiment of the pants-type disposable diaper of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pants-type disposable diaper 11 top sheet 12 back sheet 13 absorber 14 front waist 14 ′ back waist 15 waist opening 16 leg 17 leg opening 20 elastic side panel 21 waist elastic member 22 leg Elastic member 23 Waist elastic member 30 Waste tape 31 Seal part A Back part B Crotch part C Ventral part D Near waist opening E Waist part

Claims (3)

[Claims] 1. A disposable diaper comprising a main body including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets. An abdominal part located on the abdominal side, a dorsal part located on the back side, and a crotch part, and elastic side panels are provided on both left and right side edges of the abdominal part and the dorsal part, respectively. The elastic side panel of the abdominal part and the elastic side panel of the dorsal part are joined and fixed, and a waist opening and a pair of left and right leg openings are formed. An elastic member is arranged near the waist opening in the abdominal part and the dorsal part, and a waste tape is provided on the surface of the back sheet in the substantially central part of the dorsal part. Pants type characterized by Disposable diapers. 2. The pants according to claim 1, wherein a plurality of the elastic members near the waist opening are arranged at predetermined intervals and substantially parallel to an edge of the waist opening. Type disposable diapers. 3. The pants-type disposable diaper according to claim 1, wherein the stress at the waist opening at the 50% extension between the back side and the abdomen is different.