JP3382793B2 - Pants-type disposable paper diapers - Google Patents

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 paper diaper, and more particularly to a pants-type disposable diaper that fits the body shape of a wearer such as an infant or a child and prevents leakage of urine and feces from the waist opening. Regarding disposable paper diapers.

[0002]

2. Description of the Related Art Conventionally, an absorbent body is enclosed between a liquid-permeable top sheet and a liquid-impermeable back sheet, leaving at least a flap portion constituted by each of the sheets around the legs, and is used as a precursor before use. A paper diaper is widely used in which a fastening tape fixed to the back of the body is fastened to wrap the crotch portion of the wearer.

In recent years, however, so-called pants-type diapers have been used for the purpose of facilitating the separation of the diaper or for the purpose of relieving an adult from the work of wearing a fastening tape each time and simplifying the wearing. Is being developed.

Various proposals have already been made for this pants-type disposable diaper, and one example thereof is that shown in FIG. 12 of the accompanying drawings in Utility Model Registration No. 3024357. That is, on the liquid impermeable back sheet 2 made of polyethylene or the like,
Waist elastic elastic members 6 and 7 are arranged in the front and rear waist regions, both ends are positioned below the waist elastic elastic member 6, and the central portion is inflated to the crotch side. The first elastic elastic member 4 and the second elastic elastic member 5 around the leg whose both ends are located below the waist elastic elastic member 7 and whose central portion is inflated to the crotch side are provided, and the abdomen and the back side are further provided. In addition, an abdominal elastic expansion / contraction member 8 and a back elastic expansion / contraction member 9 are also provided, and each elastic expansion / contraction member 9 is fixed to the liquid-impermeable back sheet 2 by a hot melt adhesive, and the absorber 3 is disposed thereon. Further, the liquid-permeable top sheet 1 is further laminated thereon, and is integrated, folded in the front-rear direction, and the folded side edges are fixed by ultrasonic welding or the like to obtain a pants-type disposable diaper.

In this case, the waist elastic expansion / contraction members 6 and 7 seal the opening of the diaper, and the abdominal elastic expansion / contraction member 8 and the back elastic expansion member 9 are prevented from hitting the abdomen and the back, respectively. However, the first leg elastic second elastic member 4 and the second leg elastic second elastic member 5 have a function of sealing the leg circumference.

[0006]

The body shape of the infant or child who is the wearer is generally more rounded with the abdomen and hips protruding more than that of an adult, and the skin is sensitive, so the slipping of the diaper itself is prevented. Abdominal compression should be avoided as much as possible.

However, in the above-mentioned prior art, in order to prevent the diaper itself from slipping off, it is necessary to reinforce the tightening by the waist elastic elastic members 6, 7.
Although the abdominal elastic expansion / contraction member 8 and the back side elastic expansion / contraction member 9 are provided, in order to surely prevent the paper diaper itself from slipping down, each elastic expansion / contraction member 8 and 9 require a strong contraction force. Are evenly arranged in the lateral direction, so that a strong pressing force is exerted particularly on the rounded abdomen, which puts a burden on the wearer.

[0008] Therefore, the main object of the present invention is to prevent the action of an excessive pressing force on the abdomen of the wearer.

[0009]

The invention according to claim 1 which has solved the above-mentioned problems is a pants-type disposable paper diaper in which a front body and a back body are integrally formed at their side portions in a product state. 1 along the lateral direction on the abdomen of
One or a plurality of elastic first elastic members are provided, and the central portion is curved in the crotch side .
30mm or more from the center line in the front-rear direction
A second position in which the absorber is arranged in the curved part, which is upwardly displaced and has both ends intersecting the first elastic member.
Elastic elastic members are provided to seal the leg circumference and
One or more leg elastics that are separate from the elastic member
A pants-type disposable paper diaper having an elastic member .

The invention according to claim 2 is the pants-type disposable paper diaper according to claim 1, wherein one or a plurality of elastic elastic members for the buttocks are provided along the lateral direction at the buttocks of the back body corresponding to the abdomen. .

According to a third aspect of the present invention, one or a plurality of buttocks elastically expanding and contracting members are provided along the lateral direction at the buttocks of the back body corresponding to the abdomen, and further, both ends of the back body are substantially legs. It is located in the peripheral opening, the central part bulges toward the back side, and the central part is located at the buttocks part 1
The pants-type disposable paper diaper according to claim 1, wherein an elastic elastic member for fitting a back body or a plurality of books is provided.

According to a fourth aspect of the present invention, one or a plurality of elastic members for buttocks are provided along the lateral direction at the buttocks of the back body corresponding to the abdomen, and further, at the back body, both ends are the buttocks. The elastic elastic member for lifting up one or a plurality of rear bodies, which is located at a location, has a central portion that bulges toward the crotch side, and has a central portion that intersects with the disposition position of the absorber is provided. This is a pants-type disposable paper diaper.

According to the first aspect of the present invention, one or more first elastic elastic members (abdominal elastic elastic members) are provided in the abdomen of the front body along the lateral direction, while the central portion is the crotch side. A second elastic expansion / contraction member in which the absorber is arranged, the second elastic expansion / contraction member having a curved shape with both ends crossing the first elastic expansion / contraction member, and the absorber being disposed in the bending part. Deviates from the center line to the opening edge side around the waist. As a result, the second elastic stretchable member causes the absorber to move to the front body edge (opening edge).
Lift to the side to prevent ventral urine or stool leaks (especially when prone).

On the other hand, the first elastic member applies the front body of the disposable diaper to the abdomen of the wearer. In this case, the first elastic member tightens the front body of the disposable diaper in a state where the second elastic member lifts the front body edge side of the absorbent body, so that the two functions are combined to shift the absorbent body. Falling is prevented and thus the front body does not fall off during exercise. On the contrary, since the second elastic member mainly bears the slip-off, the first elastic member has a tightening force sufficient to fit the front part of the disposable diaper to the abdomen of the wearer. A small amount of power is enough. As a result, it is possible to prevent excessive compression force from acting on the abdomen of the wearer.

In this case, the central portion of the second elastic member is displaced from the longitudinal center line of the product by 30 mm or more (more preferably 45 mm or more) toward the front body edge side. When the displacement distance indicated by reference character D in FIG. 3 is short, it has only the function of pressing (the absorber of) the crotch part to the wearer side, and fulfills only the same function as the leg elastic elastic member. .

The operation peculiar to the invention of the other claims will be described in the following description of the embodiments.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 5 and 7 to 8
FIG. 4 shows a first structural example of a pants-type disposable diaper according to the present invention. This disposable diaper is typically shown in FIG.
Further, as the structure is clearly shown in FIG. 5, the absorbent main body 31 made of cotton pulp or the like is formed by the liquid permeable top sheet 10 made of a non-woven fabric and the liquid impermeable back sheet 20 made of a polyethylene sheet. A diaper body 30 having a structure including the diaper body is provided on the body backsheet 40.

The absorbent main body 31 in the embodiment includes an hourglass-shaped upper absorbent body 31A having a wide area and a rectangular lower absorbent body 31B having a slightly narrow area, which are wrapped with tissue papers 32A and 32B. Although not shown, it contains a high-molecular-weight absorbing polymer at an appropriate position, and exhibits semi-rigidity that does not change its size as a whole but can be deformed.

On the contrary, on the absorbent main body 31, the liquid-permeable top sheet 10 is almost entirely on the hot-melt adhesive H (the same applies to the hot-melt adhesive used for bonding to other parts). (Illustrated by reference numeral H), and the liquid-impermeable back sheet 20 is fixed to the bottom of the absorber main body 31 by the hot-melt adhesive H to form the diaper main body 30.

Further, a main body backsheet 40 having a wide area and exhibiting elastic stretchability is separately provided to the diaper main body 30 composed of the above-mentioned components. The main body backsheet 40 has an outer shape larger than that of the absorbent element so as to form a flap portion, and has a pseudo hourglass shape as a whole, and the front backsheet 41 is attached to the backside backsheet 42 with the hot-melt adhesive H. It is a thing.

Side barrier cuffs 5 on both sides of the product
0, 50 are provided. These barrier cuffs 5
0 and 50 preferably have a sheet that is liquid-impermeable or water-repellent as a constituent element.

The side barrier cuff 50 has one side portion of its constituent sheet interposed between the surface backsheet 41 and the liquid impermeable backsheet 20 and fixed to them by a hot-melt adhesive H, respectively, and has an outer edge. Part is folded back to the surface side of the product while wrapping the side edge of the tissue paper 32B, and the folded part extends to the center line side of the product,
A part of the extending portion constitutes an inner edge portion and is folded back inward, and further, at the inner edge portion of the constituent sheet, a first portion is formed.
The elastic elastic member 51 for standing up is secondly provided at the outer edge portion.
The upright elastic stretchable member 52 is fixed to the component sheet with a hot melt adhesive (not shown by reference numeral).
Standing elastic elastic member 51 and second standing elastic elastic member 52
An intermediate part between and is fixed to a side edge portion of the liquid-permeable top sheet 10 by a hot melt adhesive H.

The front and rear ends of the product near the inner edge of the constituent sheet constituting the side barrier cuff 50 are fixed to the liquid permeable top sheet 10 by a hot melt adhesive (not shown).

As a result, the front and rear ends of the first elastic elastic member 51 for standing up are restrained by the diaper body 30 as shown in phantom on the right side of FIG. Only the portion becomes a free end portion and stands up toward the inside of the product due to the contracting force of the first upright elastic stretchable member 51 to form a first barrier cuff portion B1. On the other hand, at the front and rear ends of the outer edge portion of the sheet forming the side barrier cuffs 50, the back surface backsheet 42 has the liquid permeable top sheet 10 and the side barrier cuffs 5.
It is folded back to the front side so as to cover the front and rear ends of 0 (the details of this structure are not shown, but the folded portion is denoted by reference numeral 42a).
As a result of being fixed with a hot melt adhesive,
The front and rear ends are restrained by the diaper main body 30, and in the use state of the product, only the middle part thereof is a free end, and stands up toward the outside of the product along with the contracting force of the second elastic elastic member 52 for standing up, A second barrier cuff portion B2 is formed.

Compared to the example of FIG. 4, tissue paper 32
B does not extend to the second barrier cuff part B2,
As shown in FIG. 6, a modification including an upper absorbent body 31A and a rectangular lower absorbent body 31B having a slightly narrower area is also proposed.

On the other hand, in order to fit the product to the wearer and prevent leakage of urine and feces, various elastic stretchable members are provided on the surface backsheet as mainly shown in FIGS. 1 and 3. It is interposed between 41 and the back surface backsheet 42, and is fixed to both sheets with a hot melt adhesive H.

This will be described in detail below. Front body F
A plurality of (six in the illustrated example) abdominal elastic elastic members (first elastic elastic members) 61, which are made of, for example, rubber thread, are provided along the lateral direction at the abdomen corresponding to the abdomen (see FIG. 8), and both ends are abdomen. , The central part bulges (curves) toward the crotch side, and the central part intersects with the disposition position of the absorbent body 31, and further 30 mm from the longitudinal center line L of the product.
Deviated to the front body F edge side (see reference numeral D in Fig. 3),
For example, a plurality of elastic rubber elastic members (second elastic elastic members) 62 made of rubber thread (six in the illustrated example) are lifted.
Is provided.

On the other hand, a plurality of elastic elastic members 63 for the buttocks (four in the illustrated example) made of, for example, rubber thread along the lateral direction at the buttocks (see FIG. 8) of the back body B corresponding to the abdomen.
Is provided.

Further, in the back body B, both ends are located almost at the leg openings, the central part bulges toward the back side, and the central part is located at the buttocks, for example, a plurality of rubbers ( An elastic elastic member 64 for rear body fitting is also provided (four in the illustrated example).

Further, in the opening of the front body F and the opening of the back body B, in the illustrated example, four waist elastic elastic members 65 and 66 made of, for example, a rubber band are provided, respectively.

On the other hand, one or a plurality (three in the illustrated example) of leg elastic elastic members 67, 6 for sealing around both legs.
8 are provided. Leg elastic elastic members 6
Although there are various forms of 7, 68 as long as they seal around the legs, in the illustrated example, in the leg elastic elastic member 67, both side edges of the front body F are connected to each other and bulge toward the lowermost part of the inseam. In the leg elastic elastic member 68, the both side edges of the rear body B are connected to each other and bulge toward the lowermost part of the crotch, and the lowermost parts of the elastic member 67, 68 are close to each other in the vicinity of the center line L in the front-rear direction. Is. Elastic stretchable member 67,
The lowermost portion of 68 is continuous as shown by the phantom line in FIG. 3, and the phantom line portion can be cut off. Further, the leg elastic elastic member may be a member that continuously extends in the front-rear body direction along the leg.

In such a structure, as shown in FIG. 7, the main body backsheet 40 is folded back and forth, and the side portions 40X, 40X thereof are joined by heat welding or hot melt adhesive. A pants-type diaper is assembled. Reference numeral 70 shown in FIG. 2 is a tri-fold adhesive tape for fixing the diaper when it is rolled and discarded.

In such a mode, as can be easily inferred from the mode shown in FIG. 8, the elastic member 62 for lifting the front body lifts the absorber main body 31 to the edge side of the front body F, which is caused by the displacement of the absorber main body 31. Prevent leakage of urine or feces from the ventral side. On the other hand, the abdominal elastic stretchable member 61 applies the front body F of the disposable diaper to the abdomen of the wearer. As described above, these together can prevent the absorbent body from slipping off and prevent the action of excessive pressure on the abdomen of the wearer.

On the other hand, in the back body B, a buttocks elastic stretchable member 63 is provided along the lateral direction at the buttocks portion of the back body B corresponding to the abdomen. This buttock elastic elastic member 63 applies a buttock-corresponding portion of the paper diaper (in the illustrated example, the spine region slightly above the buttock) to the buttock of the wearer, and cooperates with the abdominal elastic elastic member 61 to buttock and abdomen. Tighten. Further, the elastic elastic member 64 for rear body fitting has its both ends located substantially at the leg openings, the central part bulges toward the back side, and the central part is located at the buttocks, so that the hips The upper part of the opening of the back body is pulled up to the spine region slightly above the buttocks along the roundness of the lower part of
To fit the wearer appropriately.

The leg elastic elastic members 67 and 68 not only seal the leg openings but also improve the fit. Elastic waist elastic members 65, 66 which are not essential in the present invention
Prevent leakage of urine and feces from around the waist.

FIG. 9 shows a second example. One or a plurality of buttocks elastically expanding and contracting members 63 are provided along the lateral direction at the buttocks of the back body B corresponding to the abdomen, and both ends thereof are provided. Is located at the buttocks, the central part swells to the crotch side,
Further, one or a plurality of (six in the illustrated example) rear body lifting elastic stretchable members 69 having a central portion intersecting with the arrangement position of the absorber main body 31 are provided.

In this case, like the front body lifting elastic expansion / contraction member 62, the back body lifting elastic expansion / contraction member 69 has a function of lifting the absorber main body 31 in the back body.

As shown in FIG. 10, a structure is also proposed in which the elastic member 69 for lifting the rear body is omitted.

Each of these aspects is provided by the wearer's age and the purchaser's choice of desired function.

The barrier cuff in the embodiment has a structure in which a first barrier cuff portion B1 and a second barrier cuff portion B2 are formed. In this structure, even if the first barrier cuff portion B1 is crossed by urine or particularly loose stool,
It has a function of sealing with the second barrier cuff portion B2.

In the disposable diaper according to the embodiment, the main body backsheet 40 has elastic elasticity. Therefore, when the diaper is worn, the entire body backsheet 40 is tightened against the wearer, and the absorber main body 31 separates from the skin even if the wearer's movement is active with this. Will always fit without.

The first structural example shown in FIG. 1 to FIG. 5 and FIG. 7 to FIG. 8 is the liquid permeable top sheet 10, the liquid impermeable back sheet 20 and the absorbent interposed between them. A main body backsheet 40 is further provided to the diaper main body 30 having a body, and constitutes the pants-type disposable diaper of the present invention.

On the other hand, as shown in FIG. 11, the absorbent main body 31 may be interposed between the liquid-permeable top sheet 10A and the liquid-impermeable back sheet 20A. In this case, each elastic stretchable member described above can be fixed to the liquid-impermeable back sheet 20A by a hot melt adhesive (each elastic stretchable member in this embodiment is not shown). Therefore, in the example of FIG. 11, the diaper body itself according to the present invention constitutes the underpants type paper diaper of the present invention as it is in a product state.

From the standpoint of preventing stuffiness, the main body backsheet 40 is desired to have at least one of breathability and waterproofness (water repellency), and more preferably both.
The material can be appropriately selected, but as an example, a rayon spunlace nonwoven fabric made by mixing polypropylene-based heat-sealing fibers and rayon fibers, and a melt-blown nonwoven fabric mainly composed of urethane or isoprene rubber-based materials are heat-sealed,
An example is one in which the former non-woven fabric is used on the skin side of the wearer by integrating them by ultrasonic bonding, bonding with a hot melt adhesive, or the like.

In the first structural example, the liquid impermeable back sheet 20 is used, but if the main body back sheet 40 is liquid impermeable, it may be liquid permeable. That is, at least one of the liquid impermeable back sheet 20 and the main body back sheet 40 may be liquid impermeable. Further, if the main body backsheet 40 is liquid-impermeable, as it can be inferred from the aspect of FIG. 11, it is used as the liquid-impermeable backsheet according to the present invention, and the liquid-impermeable backsheet 20 is used. It can be omitted.

As the barrier cuffs, almost all are folded back to form a double sheet, but the standing portion may be a single sheet. The number of elastic elastic members for standing up is appropriate. Also, the barrier cuffs can be omitted.

[0047]

As described above, according to the present invention, the fit of the wearer's body shape is improved, and in particular, the main body of the absorbent body is prevented from slipping off, so that urine and feces are leaked from the waist opening surface. Can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a development view showing an arrangement example of elastic elastic members of a pants-type paper diaper according to the present invention.

FIG. 2 is a development view of a product.

FIG. 3 is a development view showing a relationship with an absorbing element.

FIG. 4 is a view taken along line 4-4 in FIG.

5 is a view taken along line 5-5 in FIG.

FIG. 6 is a view corresponding to a line 4-4 arrow in FIG. 2 in another aspect.

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

FIG. 8 is an explanatory diagram of an arrangement example of elastic elastic members in a product state.

FIG. 9 is a development view showing another arrangement example of the elastic expansion / contraction members.

FIG. 10 is a development view showing another arrangement example of elastic stretchable members.

FIG. 11 is a development view showing another example of the present invention.

FIG. 12 is a development view of a conventional pants-type paper diaper.

[Explanation of symbols]

10 ... Liquid-permeable top sheet, 20 ... Liquid-impermeable back sheet, 30 ... Diaper body, 31 ... Absorber main body, 40 ... Main body back sheet, 50 ... Side barrier cuffs, 51 ... First standing elastic stretchable member, 52 ... Second elastic elastic member for standing up, 61 ... First elastic elastic member (abdominal elastic elastic member),
62 ... Second elastic elastic member (front body lifting elastic elastic member), 63 ... Buttocks elastic elastic member, 64 ... Rear body fitting elastic elastic member, 65, 66 ... Waist elastic elastic member, 6
7, 68 ... Leg elastic elastic members, 69 ... Rear body lifting elastic members, F ... Front body, B ... Rear body, H ... Hot melt adhesive.

Claims (4)

(57) [Claims] 1. A pant-type disposable paper diaper in which a front body and a back body are integrated at their side portions in a product state, wherein one or a plurality of first pants are provided on the abdomen of the front body in the lateral direction. An elastic elastic member is provided, and the central part is curved in the crotch side, and this curved part is in the front-back direction of the product.
From the center line to the waist opening edge side From the front-back center line of the product
A second elastic expansion / contraction member, which is displaced by 30 mm or more and has both ends intersecting the first elastic expansion / contraction member, and in which the absorber is arranged in the curved portion, seals the leg circumference and Separate from the second elastic elastic member
A pants-type disposable paper diaper, which is provided with one or a plurality of elastic elastic members around the legs . 2. The pants-type disposable paper diaper according to claim 1, wherein one or a plurality of elastic elastic members of the buttocks are provided along the lateral direction at the buttocks of the back body corresponding to the abdomen. 3. One or a plurality of elastic members for the buttocks are provided along the lateral direction at the buttocks of the back body corresponding to the abdomen, and further, in the back body, both ends are located substantially at the leg openings. The pants-type disposable paper diaper according to claim 1, further comprising one or a plurality of elastic elastic members for back body fitting, the central part of which is bulged toward the back side and the central part of which is located at the buttocks. 4. One or a plurality of elastic elastic members for the buttocks are provided along the lateral direction at the buttocks of the back body corresponding to the abdomen, and further, at the back body, both ends are located at the buttocks, and the center is located. 2. The pants-type disposable paper diaper according to claim 1, wherein one or more rear body lifting elastic stretchable members are provided whose parts bulge toward the crotch side and whose central part intersects with the arrangement position of the absorber.