JP3391776B2 - Disposable pants - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to, for infants, Ru <br/> relates to a disposable pan tool to be used as for adults, or incontinent persons.

[0002]

2. Description of the Related Art In a conventional disposable diaper, as disclosed in Japanese Patent Laid-Open No. 57-77304, a pair of left and right side flaps are joined and fixed to each other by connecting the ventral and dorsal regions to each other. So-called pants-type disposable pants in which a leg opening and a waist opening are formed have been proposed. The pants-type disposable pants (hereinafter, referred to as “disposable pants”) are configured such that the leg openings and the waist openings are formed to be expandable and contractable so as to fit the wearer's body shape. Such disposable pants can usually be worn by the wearer himself in an upright position, and for toilet training to promote "diaper separation" of an infant, or incontinence or a walkable adult. It is said to be useful for business.

[0003] In general, gather in disposable pants is for to follow the pants to the movement of the wearer, gathers to prevent leakage of excrement, and fit soft in order not to damage the wearer Should be. As means for preventing the wearer from being injured, various proposals have hitherto been made, such as using a low modulus elastic member, providing a plurality of elastic members in a wide width, and arranging a cushion material between the gather and the skin. .

[0004]

However, the above-mentioned conventional
The disposable pants of the
There was a difficult problem in achieving both "prevention of user injury". In the waist gather of the disposable pants, the elastic member extended and arranged between the top sheet and the back sheet is contracted so that the top sheet and the back sheet have a fold, and the waist gather is configured so as to cover the entire waist opening. Although it is placed around the circumference, in rare cases, excrement may leak outside the pants through the folds in the folds of the top sheet. On the other hand, if the excreted liquid was kept in the gap between the folds of the top sheet even if it did not leak out, it could cause eczema or a rash on the wearer.

If the stretch rate of the gathers is increased in order to prevent such leakage of excrement, the wearer is injured, and the sheet is thinned so as to reduce the gap between the folds. Then, there is an inconvenience that the texture becomes bad. Accordingly, it is an object of the present invention to include waist openings.
It prevents the leakage of excrement from the open mouth, keeps the excretory liquid in the waist opening , and is gentle on the skin.
It is to provide a not to disposable bread tree.

[0006]

The present invention comprises a main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these sheets, the main body comprising: It is divided into an abdominal part located on the abdominal side of the wearer when worn and a dorsal part located on the dorsal side, and the waist is formed by joining and fixing both side edges of the abdominal part and the dorsal part. In a pants-type disposable pants having an opening and a pair of leg openings, a waist elastic member is arranged over the entire circumference of the waist opening adjacent to the waist opening , and side flaps of the pair of legs are provided. Has
Form gathers on each of the pair of leg openings
The leg elastic member is arranged and the above-mentioned back sheet
Is a liquid-impermeable sheet with vapor permeability that allows vapor to pass through.
Thus, a pair of left and right side flaps of the abdominal side portion and the back side portion, which extend outwardly in the width direction of the diaper from both side edges in the longitudinal direction of the absorbent body, are configured.
Across the wrap and the absorbent body, and across the width of the diaper
Are arranged side elastic member to form a gather that exist Te, the leg elastic members, the one of said leg portions
Along the upper edge of the leg opening along the periphery of the leg opening
Te reaches to the crotch portion of the leg openings, from which, from one of the leg portions over the other of the leg portions across the width direction of the diaper so as to overlap with the absorbent body, said other Les
From the crotch part of the leg opening of the bag to the circumference of the leg opening
The waist elastic member, the side elastic member, and the leg elastic member are arranged along the edge so as to reach the upper end portion of the leg opening portion.
Stress at the time of extension Ri 30~100g der, the absorbent body,
The main material is defibrated pulp and a high-molecular water-absorbing polymer is also used.
Or thermoplastic resin, cellulose fiber and polymeric water absorption
It is a mixture of polymers that has been heat treated and
Water polymer absorbs and retains 20 times more liquid than its own weight
By providing a disposable pants to have characterized Rukoto have to be maintained performance is obtained by achieving the above object.

(Deleted)

[0008]

[Operation] Waist elastic member and absorbent body width direction
Between the leg elastic member traversing the
And specify the magnitude of the extension force of these elastic members.
The wearer's abdominal compliance and fit.
Excretion as it can be added
You can prevent things from moving in the diaper inadvertently.
Therefore, the excrement can be effectively absorbed by the absorber. That
Therefore, it is difficult for waste to be retained in the waist and
Prevents leakage and uses elastic members with strong extension force.
Even if it is not used, leakage can be prevented, so the wearer's skin is hurt.
And there are few marks on the abdomen.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to FIGS.
As shown in FIGS. 1 and 2, the disposable pants 1 according to the embodiment of the present invention includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body arranged between these sheets. 4 is divided into a ventral side portion 5A located on the ventral side of the wearer and a back side portion 5B located on the back side when the body is worn. And pants-type disposable pants in which both side edges of the back side portion 5B are fixedly joined to each other to form a waist opening portion 13 and a pair of leg opening portions 14A and 14B. Elastic members 8A, 8
B is Ru Tei is disposed over the entire circumference opening.

On both sides of the body 5 in the width direction, leg portions 5C which are recessed in an arc shape are formed. The body 5 is divided into an abdominal part 5A located on the abdominal side of the wearer and a dorsal part 5B located on the dorsal side when worn, and the abdominal part 5A and the dorsal part 5B are provided.
And are formed substantially symmetrically with respect to the vertical center line 6 located substantially in the center of the main body 5. In the ventral side portion 5A and the back side portion 5B of the main body 5, a pair of waist flaps 7A, 7B extending outwardly from the longitudinal end edges of the absorber 4 are provided.
And waist elastic members 8A and 8B forming gathers are arranged on the waist flaps 7A and 7B, respectively. A pair of left and right side flaps 9 on the abdominal side and the dorsal side that extend outward in the width direction from both side edges in the longitudinal direction of the absorbent body 4.
A and 9B have side flaps 9A and 9B and an absorber.
4, side elastic members 10A and 10B forming a gather existing across the width of the diaper are arranged. In addition, a pair of side flaps 9A and 9B of the leg portions
Includes a pair of leg openings 14A, 14B (see FIG. 2)
Leg elastic members 11A forming gathers on each,
11B and side flaps 9A and 9 on the back side and the ventral side
B is partially joined and fixed at both side edges 12B and 12A to form a waist opening 13 and a pair of left and right leg openings 14A and 14B as shown in FIG.

The waist flaps 7A, 7B and the side flaps 9A, 9B are basically overlapping portions of the top sheet 2 and the back sheet 3, respectively, and are integrally formed on the main body 5. The leg portion 5C, the curved shape is disposed a leg elastic member 11A and 11B are stretched, are formed in an arc shape along the horseshoe of their respective leg portion 5C. Specifically, the leg elastic member 11
A and 11B are the legs of one leg 5C, respectively.
The circumference of the leg opening 14A from the upper end of the opening 14A.
Along the edge to the crotch part of the leg opening 14A,
From here, it crosses in the width direction of the diaper so as to overlap with the absorber 4 from one leg portion 5C to the other leg portion 5C, and the crotch of the leg opening portion 14B of the other leg portion 5C.
The leg opening along the periphery of the leg opening 14B.
It is arranged so as to reach the upper end of the mouth portion 14B . In the portion where the absorber 4 is overlapped, the leg elastic member 11
Both A and 11B are preferably non-elongating.

On the other hand, the waist elastic members 8A and 8B arranged on the waist flaps 7A and 7B are a plurality of filaments arranged substantially parallel to each other along the edges of the waist flaps 7A and 7B, respectively, as the topsheet 2. And the back sheet 3 are continuously joined. Elastically contractible three-dimensional cuffs 20A and 20B are arranged at positions adjacent to the waist elastic members 8A and 8B. As a result, when the waist opening 13 is formed, the waist elastic members 8A and 8B and the elastic contractible solid cuffs 20A and 20B are formed.
Will be arranged continuously along the periphery of the waist opening 13.

As shown in detail in FIG. 3, the three-dimensional cuffs 20A and 20B have a fixed portion 21 and a free portion 22, and are generally constituted by a sheet member 24 and a cuff elastic member 23, and the fixed portion 21 is a top sheet. 2 or the back sheet 3 is joined and fixed, and the free portion 22 has a cuff elastic member 23 interposed at the end thereof, thereby imparting elastic contractibility to the three-dimensional cuffs 20A and 20B. The sheet member 24 may be the top sheet 2 or the back sheet 3, and a part of the back sheet 3 is used in this embodiment. Further, the sheet members 24 themselves of the three-dimensional cuffs 20A and 20B may have elastic contractibility. In this case, the cuff elastic member 23 can be omitted.

As shown in FIG. 3, the above-mentioned fixed portion 21 is a sheet member 2 which constitutes three-dimensional cuffs 20A and 20B.
4 is joined and fixed to the vicinity of the end edge of the waist opening 13. The fixed portion 21 is made up of three-dimensional cuffs 20A, 20.
At B, it has a fixed edge 25 which becomes a boundary point with the free portion 22. Further, in a diaper for a high-age child or an adult, the length of the absorbent body in the longitudinal direction becomes large, so the fixed edge 25 may be provided on the absorbent body. The fixed edge 25 is formed between the waist elastic members 8A and 8B and the absorber 4, and the fixed portion 21 is formed from the opening end of the waist opening 13 to the fixed end. As a method for joining and fixing the fixing portion 21, a method known in the art such as ultrasonic sealing, heat sealing, or adhesive can be used. In the present embodiment, since the fixed portion 21 is formed on the upper surface of the waist gather, the waist elastic member 8
It is preferable to bond and fix them so as not to impair the elastic properties of A and 8B.

A cuff elastic member 23 is interposed at the free end of the free portion 22 to provide elastic contractibility of the free portion 22. The free part 22 is the disposable pants 1
In the unfolded state, the fixed portion 21 extends toward the leg openings 14A and 14B (crotch portions) so as to be laid down on the main body 5. By doing so,
The free portion 22 is prevented from being inverted during and during wearing of the disposable pants 1, and an inward pocket portion 26 is formed between the free portion 22 and the main body 5. This pocket part 2
In 6, the excrement which is not absorbed by the absorber and tries to flow out is temporarily stored and held. The cuff elastic member 23 arranged at the free end flexibly fits the wearer. Also,
Preferably, the free portion 22 comprises anti-reversal means. The anti-reversal means is, for example, a hot melt adhesive or the like, and the mating surfaces of the three-dimensional cuffs 20A, 20B and the main body 5, specifically, the inside of the top sheet 2 are adhered to each other, so that the free portion 22 is turned outside. There are ways to prevent that.

The width of the fixed portion 21 (the dimension in the extending direction to the inner side) is preferably 5 to 80 mm, and the fixed edge 25 is between the waist elastic member 8B and the end edge of the absorbent body 4. It is placed 0 to 70 mm inside from. The width of the free portion 22 is preferably 10 to 50 mm. The cuff elastic member 23 is preferably a thread rubber, and in addition to this, any one known in the art such as flat rubber, film type rubber, elastic nonwoven fabric or foamed polyurethane can be used. However, the arrangement of the elastic members on the ventral side and the dorsal side is generally symmetrical. It is preferable that the stress at 150% elongation is 30 to 100 g. This is because if the weight is less than 30 g, the elasticity is not sufficient and the free portion cannot fit the wearer, and if the weight is more than 100 g, the elasticity is too strong and the wearer is hurt.

When a stretchable nonwoven fabric is used, the waist elastic members 8A and 8B can be omitted by forming the free and fixed portions of the three-dimensional cuffs 20A and 20B with the stretchable nonwoven fabric. . Three-dimensional cufflinks 20
The sheet member 24 constituting A and 20B is preferably a water-repellent and air-permeable sheet, which is thin and has a good texture, preferably a non-woven fabric. It is preferable in terms of manufacturing that the sheet member 24 is formed by using a part of the top sheet 2 or the back sheet 3, and in this embodiment, a part of the back sheet 3 is used.

The top sheet 2 is preferably a liquid permeable sheet that allows permeation of excrement into the absorbent body 4 and has a feeling close to that of underwear. Examples of such a liquid permeable sheet include woven cloth, Examples include non-woven fabrics and porous films. In addition, a silicone-based oil agent on the periphery of the top sheet 2,
Water repellent treatment is performed by applying a hydrophobic compound such as paraffin wax or by applying a hydrophilic compound such as an alkyl phosphate ester in advance and washing the peripheral edge with warm water. Leakage can be prevented.

The back sheet 3 is a moisture permeable material that allows vapor to pass through.
A liquid impermeable sheet is used, and for example, it is stretched by adding a filler to a thermoplastic resin such as polyolefin.
Formed. The absorbent body 4 is made of defibrated pulp as a main material together with a high-molecular water-absorbing polymer , or a mixture of thermoplastic resin, cellulose fiber and high-molecular water-absorbing polymer which is heat-treated , and is generally called a polymer sheet. It is used rather than preferred. As the high-molecular water-absorbing polymer, a polymer having a retention performance capable of absorbing and retaining a liquid 20 times or more its own weight is used , and a particulate polymer having a gelling property is preferably used. As such a high molecular weight water-absorbing polymer, for example, a starch-acrylic acid (salt) graft polymer, a saponification product of a starch-acrylonitrile copolymer, a crosslinked product of sodium carboxymethyl cellulose, an acrylic acid (salt) polymer and the like are preferable.

The elastic members 8A, 8B, 10A, 10
As B, 11A and 11B, thread rubber, flat rubber, film type rubber, stretchable non-woven fabric or foamed polyurethane can be used as long as it is known in the art, and one or a plurality thereof can be used. Good. In addition, weather
Strike elastic members 8A, 8B, side elastic members 10A, 10
B and the leg elastic members 11A, 11B are both Ri 1 at the time of 50% elongation stress per one is 30~100g der,
The use of a plurality of elastic members of low stress good preferable so does not stick marks on the abdomen.

Next, a preferred manufacturing method for manufacturing the disposable pants of the present invention will be described with reference to FIG. In the following forming step, Sa id elastic members 10A, 10B and the leg elastic members 11A, 11B forming process of will be omitted. The web of the backsheet 3 is unwound by the unwinding device, while the absorbent web is cut into individual absorbent bodies 4 by the cutter 50 and is intermittently arranged on the backsheet web 3.
The long sides of the absorber 4 are arranged perpendicularly to the flow direction of the web at right angles (absorber arranging step).

Further, the top sheet 2 having a width capable of substantially covering the absorber 4 is drawn out from above,
The back sheet 3 and the absorber 4 are superposed on each other by the roll 51 to form a product web (superposition step). Next, the process proceeds to the step of forming the three-dimensional cuffs 20A and 20B. Book production
In the method , the three-dimensional cuffs 20A and 20B are formed by a part of the back sheet 3. That is, the cuff elastic members 23 are stretched in parallel to the flow direction of the main web at both end edges, and the both end edges of the backsheet 3 are folded so as to wrap the cuff elastic member 23 (cuff forming step). ).

In the above-mentioned manufacturing method according to the manufacturing process diagram shown in FIG . 4 , the cuff elastic member 23 is continuously stretched over the edge portion of the back sheet 3 to form the three-dimensional cuffs 20A, 20B. Without being limited to the above, a method may be used in which a sheet piece in which the three-dimensional cuffs 20A and 20B in which the cuff elastic member 23 is arranged is separately formed is continuously joined and fixed to the back sheet 3. Next, in the waist gather forming step, the waist elastic members 8A and 8B are arranged on both side edge portions in parallel to the flow direction of the web (waist elastic member placing step), and both side edges of the backsheet 3 are folded again. .
The cuff elastic member 23 and the waist elastic members 8A and 8B are arranged so as to be wrapped around the back sheet 3 in this manner.

When all the materials are assembled, the leg opening 14 is punched in the punching step 52. The punching in the process section 52 is performed by a rotary die cutter or the like. Then, in the folding process section 53, the center line 51 of the main web in the flow direction is formed.
In step 2, the web is side-sealed in the side-sealing process section 54, and subsequently cut into individual disposable pants in the cutting process section 55 (cutting step), and finally accumulated.

In this way, the disposable pants 1 according to one embodiment of the present invention is manufactured, and the continuous pants cuffs 20A and 20B are formed on the disposable pants 1. According to such a manufacturing method as described above, it is possible to reduce the number of sheets and steps of the three-dimensional cuffs 20A and 20B, which is useful for saving the space of the processing machine. Further, according to the manufacturing method according to the manufacturing process diagram shown in FIG. 4, the folding accuracy of the back web (top sheet or back sheet) is used to improve the placement accuracy of the three-dimensional cuffs and save the space of the processing machine facility. It can be possible.

[0026] Incidentally, examples of disposable pants about the these books onset Ming, it is needless to say that arbitrarily change implemented without departing from the scope of the present invention. For example, the tear guide means may be arranged adjacent to the side seal portion of the disposable pants 1 so as to be easily peeled off by the wearer. The tear guide means is a notch guide wire, a seal portion, or something that can be easily torn, but it is necessary to have strength that does not tear or tear during wearing. .

In the case of manufacturing the disposable pants according to the present invention, the three-dimensional cuff is formed separately from the web, and the waist elastic member is arranged on the web and then joined to the web. May be. Note that the three-dimensional cuff need not use the cuff elastic member as long as the sheet member 24 itself has elasticity.

[0028]

EFFECTS OF THE INVENTION According to the disposable pants of the present invention, excrement is prevented from leaking from the opening including the waist opening, and the excretory liquid is not retained in the waist opening. Moreover, leakage does not occur even if elastic members with strong extension force are not used.
As it can prevent this, it will hurt the wearer's skin and
Almost no traces are left.

According to the disposable pants of the present invention,
It is possible to eliminate bleeding leakage from the waist due to the formation of gaps due to gathering, and also to provide an inexpensive product with excellent flap texture .

[Brief description of drawings]

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

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

FIG. 3 is a cross-sectional view taken along line XX shown in FIG.

FIG. 4 is a manufacturing process diagram of the disposable pants shown in FIG. 1.

[Explanation of symbols]

1 Disposable Pants 2 Top Sheet 3 Back Sheet 4 Absorber 5 Main Body 5A Ventral Side 5B Back Side 5C Legs 7A, 7B Waist Flap 8A, 8B Waist Elastic Member 9A, 9B Side Flap 10A, 10B Side Elastic Member 11A, 11B Leg elastic member 13 Waist opening 14A, 14B Leg opening 20A, 20B Solid cuff 23 Cuff elastic member

─────────────────────────────────────────────────── --Continued from the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61F 13/15-13/84 A61F 5/44

Claims (2)

(57) [Claims] 1. A body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these sheets, the body being on the abdominal side of the wearer when worn. It is divided into an abdominal part located and a dorsal part located on the dorsal side, and both side edges of the abdominal part and the dorsal part are joined and fixed to form a waist opening and a pair of leg openings. in the pants-type disposable pants formed bets, waist elastic members adjacent the waist opening the window
It is located all around the est opening and has a pair of lenses.
The side flaps of the bag have a pair of the above-mentioned leg openings.
Each has leg elastics that form gathers.
The above-mentioned backsheet is a liquid with moisture permeability that allows vapor to pass through.
Impermeable sheet, extending from the longitudinal side edges in the diaper width direction outer side of the absorbent body, constitute a pair of right and left side flaps of the ventral and the dorsal, of the pair Crosses side flaps and the above absorber
Ri, there is disposed a lateral elastic member forming a gather that exist across the diaper width direction, the leg elastic members, open legs of one of said leg portions
From the top of the mouth along the perimeter of the leg opening,
Reaching the crotch portion of the opening, and from there , across the width direction of the diaper so as to overlap the absorber from one of the leg portions to the other of the other leg portions , the other leg portion of the
Around the crotch of the leg opening along the periphery of the leg opening
And the waist elastic member, the side elastic member, and the leg elastic member each have a stress at the time of 150% elongation of 30 to 100 g. Oh it is, the absorbent body, the polymer water-absorbing polymer is composed primarily of the disintegrated pulp
Used together, thermoplastic resin, cellulose fiber
And a mixture of a high-molecular water-absorbing polymer and a heat-treated mixture.
The high-molecular water-absorbing polymer is a liquid that is 20 times or more its own weight.
Disposable pants having a holding performance capable of absorbing and holding . 2. One of the leg elastic members is curvedly arranged on the ventral side of one of the leg portions and crosses the crotch portion in the width direction of the main body so that the other leg portion is formed. The other one is curvedly arranged on the abdominal side, and the other one is curvedly arranged on the back side of the other leg and crosses the crotch portion in the width direction of the main body. The disposable pants according to claim 1, wherein the disposable pants are curved on the back side of the leg portion.