JP3315993B2 - 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 Application Laid-Open No. 57-77304, a pair of left and right side flaps are joined and fixed to each other to form a pair of left and right side flaps. A so-called pants-type disposable pants in which a leg opening and a waist opening are respectively formed has been proposed. The pants-type disposable pants (hereinafter, referred to as “disposable pants”) are configured such that a leg opening and a waist opening are formed to be extendable and contractable, respectively, so as to fit a wearer's body shape. Such disposable pants can usually be worn by the wearer in a standing position, for toilet training to promote the infant's "diaper separation", or for incontinent persons or walking adults. It is useful for use.

[0003] On the other hand, some proposals have also been made on a method of manufacturing disposable pants. They are basically disclosed in JP-A-57-77304 and JP-A-1-28210.
No. 2, as seen in the longitudinal direction of the absorber,
It is represented by a so-called "cross-flow" manufacturing method in which the web flow direction is vertical. Generally, the gathers in disposable pants are for following the movement of the wearer, and the gathers should be soft and fit to prevent leakage of excrement and not hurt the wearer. As means for preventing the wearer from being injured, various proposals have conventionally been made, such as using a low-modulus elastic member, providing a plurality of elastic members with a wide width, and disposing a cushion material between the gather and the skin. .

[0004]

However, in the waist gather of the disposable pants, the elastic member extended between the top sheet and the back sheet is contracted, and the top sheet and the back sheet are folded. The waist gathers are arranged over the entire circumference of the waist opening, but rarely excrement may leak out of the pants through the gaps of the folds of the top sheet. On the other hand, if the excreted liquid is kept in the gap between the folds of the top sheet even if it does not leak out, this has caused eczema and rash on the wearer.

[0005] If the elongation rate of the gathers is increased to prevent such excretion from leaking, the wearer may be injured, and the sheet is made thinner so as to reduce the gap between the folds. Then, there is an inconvenience that the touch becomes worse. Accordingly, an object of the present invention is to provide thereby preventing leakage of excrement from the waist opening, a disposable pan tool not to hold the liquid waste to the waist opening.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a body having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber disposed between the two sheets. When worn, the abdomen is positioned on the abdomen of the wearer and the back is positioned on the back, and the abdomen and the back are joined and fixed at both side edges. In a pants-type disposable pants in which an opening and a pair of leg openings are formed, a waist elastic member is arranged over the entire periphery of the opening adjacent to the waist opening, and inside the waist opening. An elastic elastic three-dimensional cuff is extended from below the waist elastic member toward the crotch part, and both ends of the absorbent body in the longitudinal direction are provided.
The ventral portion and the spine extending outward from the edge in the width direction.
At least the longitudinal direction of the pair of left and right side flaps on the side
A side elastic member forming a gather is disposed at the center.
And, on the side flaps of the pair of legs,
A gather is formed in each of the pair of leg openings.
A leg elastic member, the leg elastic member
At least two legs, each one of the above legs
From the part to the other leg part
The above object has been attained by providing disposable pants characterized by being provided with an inclined portion.

[0007]

[0008]

The three-dimensional cuff is elastically contractible and falls down toward the leg opening of the disposable pants. The three-dimensional cuff is elasticized in a peripheral portion inside the waist opening, and effectively fits the wearer's skin. The three-dimensional cuffs form a pocket between the body and the waist opening, accommodate the excrement floating in the disposable pants without being absorbed by the absorber, and absorb the part that can be absorbed by the absorber, By blocking the portion that cannot be absorbed, it is prevented from reaching the waist opening.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to FIGS.
As shown in FIGS. 1 and 2, a disposable pants 1 according to an embodiment of the present invention includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorber disposed between these two sheets. The main body 5 is divided into an abdominal part 5A located on the abdomen of the wearer and a dorsal part 5B located on the dorsal side when worn. In a pants-type disposable pants in which both side edges of the back side portion 5B are joined and fixed to form a waist opening 13 and a pair of leg openings 14A and 14B, a waist adjacent to the waist opening 13 is provided. Elastic members 8A, 8
B is arranged over the entire circumference of the opening, and inside the waist opening 13, adjacent to the waist elastic members 8A, 8B, from below the waist elastic member, is a three-dimensional elastic cuff 20A, 20B extends toward the crotch.

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

The waist flaps 7A and 7B and the side flaps 9A and 9B are basically overlapped portions of the top sheet 2 and the back sheet 3 and are formed integrally with the main body 5. Leg elastic members 11A and 11B arranged in a curved shape are stretched over the leg portion 5C, and the leg elastic members 11A and 11B
Each is formed in an arc shape along the horseshoe shape of the leg portion 5C ,
Further, from one leg 5C to the other leg 5C.
It is formed . It is desirable that both leg elastic members 11A and 11B be non-extended in the portion overlapped with absorber 4.

On the other hand, the waist elastic members 8A and 8B arranged on the waist flaps 7A and 7B are formed as a plurality of thread-like bodies arranged substantially in parallel along the edges of the waist flaps 7A and 7B, respectively. 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. Thus, when the waist opening 13 is formed, the waist elastic members 8A and 8B and the elastically contractible three-dimensional cuffs 20A and 20B are formed.
Are 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. 2 or the back sheet 3, and the free portion 22 is provided with a cuff elastic member 23 at the end thereof, thereby imparting elastic contractility to the three-dimensional cuffs 20A and 20B. The sheet member 24 may be the top sheet 2 or the back sheet 3, and in this embodiment, a part of the back sheet 3 is used. Further, the sheet members 24 of the three-dimensional cuffs 20A and 20B may have elastic contractility. In this case, the cuff elastic member 23 can be omitted.

As shown in FIG. 3, the fixing portion 21 is a sheet member 2 which forms the three-dimensional cuffs 20A and 20B.
4 is joined and fixed near the edge of the waist opening 13. The fixed portion 21 includes three-dimensional cuffs 20A, 20C.
B has a fixed edge 25 serving as a boundary point with the free portion 22. Further, in a diaper for a high-month-old baby or an adult, the length of the absorber in the longitudinal direction is increased, so that the fixing edge 25 may be provided on the absorber. 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. In addition, as a method of joining and fixing the fixing portion 21, a known method such as an ultrasonic seal, a heat seal, an adhesive, or the like can be used. In this embodiment, since the fixing portion 21 is formed on the upper surface of the waist gather, the waist elastic member 8 is formed.
A and 8B are preferably bonded and fixed so as not to hinder the physical properties of elasticity.

The free portion 22 is provided at its free end with a cuff elastic member 23 to provide elasticity of the free portion 22. The free part 22 is the disposable pants 1
Is extended from the fixed portion 21 toward the leg openings 14A and 14B (the crotch portion) so as to fall down on the body 5. By doing so,
The free portion 22 is not inverted when and during wearing 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
6 temporarily stores and holds excrement that is going to protrude without being absorbed by the absorber. The cuff elastic member 23 disposed at the free end flexibly fits the wearer. Also,
Preferably, the free part 22 comprises a reversal prevention means. The reversing prevention means means that the free portion 22 is bent outward by, for example, bonding the mating surface between the three-dimensional cuffs 20A and 20B and the inside of the main body 5 specifically the top sheet 2 with a hot melt type adhesive or the like. There are ways to prevent that.

The width of the fixed portion 21 (dimension in the direction of inward extension) is preferably 5 to 80 mm, and the fixed edge 25 is located between the waist elastic member 8B and the edge of the absorber 4. It is arranged at a position of 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 may be any one known in the art such as a flat rubber, a film-type rubber, a stretchable nonwoven fabric, and a foamed polyurethane. 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. If it is less than 30 g, the elasticity is not sufficient and the free part cannot be fitted to the wearer. If it is more than 100 g, the elasticity is too strong and may damage the wearer.

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 the sheets A and 20B is preferably a water-repellent and air-permeable sheet, and is made of a thin and good texture, preferably a nonwoven fabric. The sheet member 24 is preferably formed using a part of the top sheet 2 or the back sheet 3 from the viewpoint of manufacturing. In this embodiment, a part of the back sheet 3 is used.

The top sheet 2 is preferably a liquid-permeable sheet capable of transmitting excrement to the absorber 4 and having a feeling close to that of underwear. Examples of such a liquid-permeable sheet include woven cloth and There are a nonwoven fabric and a porous film. In addition, a silicone-based oil agent is provided on the periphery of the top sheet 2,
A method of applying a hydrophobic compound such as paraffin wax, or a method of applying a hydrophilic compound such as an alkyl phosphate ester in advance and performing a water-repellent treatment by a method of washing the periphery with warm water. Leakage can be prevented.

The back sheet 3 is made by adding a filler to a thermoplastic resin such as polyolefin, and is stretched. The back sheet 3 is a moisture-permeable liquid-impermeable sheet that allows vapor to permeate, or a sheet having a feeling similar to underwear, such as a film. A composite material of a nonwoven fabric or a composite material of a film and a woven fabric is used. The absorbent 4 is preferably made of fibrillated pulp as a main material and a high-molecular-weight water-absorbing polymer in combination.
A mixture obtained by heat-treating a mixture of cellulose fibers and a high-molecular-weight water-absorbing polymer, and more preferably a mixture generally referred to as a polymer sheet, is preferred. The high-molecular water-absorbing polymer has a holding performance capable of absorbing and holding a liquid 20 times or more its own weight, and is preferably in the form of particles having a gelling property. Examples of such a high-molecular water-absorbing polymer include starch. -Acrylic acid (salt) graft polymer, saponified starch-acrylonitrile copolymer, crosslinked sodium carboxymethyl cellulose, acrylic acid (salt) polymer and the like are preferable.

The elastic members 8A, 8B, 10A,
As B, 11A and 11B, any known in the art, such as thread rubber, flat rubber, film-type rubber, stretchable nonwoven fabric or foamed polyurethane, can be used. Good. Also, the stress at the time of 150% elongation of one elastic member is 30 to 10
The weight is preferably 0 g, and it is more preferable to use a plurality of low-stress elastic members so that no trace is formed on the abdomen.

Next, a preferred embodiment for manufacturing the disposable pants according to the present invention will be described with reference to FIG. In the following forming steps, the steps of forming the side elastic members 10A and 10B and the leg elastic members 11A and 11B will be omitted in order to clarify the essence of the present invention. The web of the backsheet 3 is fed out by the unwinding device, while the absorber web is cut into individual absorbers 4 by the cutter 50 and is intermittently arranged on the backsheet web 3. The long side of the absorber 4 is
It is arranged perpendicularly to the flow direction of the web (absorber arrangement step).

Further, the top sheet 2 having a width capable of substantially covering the absorber 4 is drawn out from above, and
The product is superimposed on the backsheet 3 and the absorber 4 by the roll 51 to form a product web (superposition process). Next, the process proceeds to the step of forming the three-dimensional cuffs 20A and 20B. In this embodiment, the three-dimensional cuffs 20A and 20B are formed by a part of the back sheet 3. That is, the cuff elastic members 2 are provided at both edge portions in parallel with the flow direction of the main web.
3 and the edge portions of both ends of the back sheet 3 are folded in such a manner as to surround the cuff elastic member 23 (cuff formation).

In this embodiment, the cuff elastic member 23 is continuously stretched on the edge of the back sheet 3 to form the three-dimensional cuff 20.
A, 20B, but without being bound by the above,
Three-dimensional cuff 20A, 20 with cuff elastic member 23 arranged
A method of continuously joining and fixing a sheet piece in which B is formed separately to the back sheet 3 may be used. Next, in the waist gather forming step, the waist elastic members 8A and 8B are arranged on both side edges in parallel with the web flow direction (waist elastic member arranging step), and both side edges of the back sheet 3 are folded again. . The cuff elastic member 23 and the waist elastic members 8A and 8B are wrapped around the back sheet 3 in this manner.

When all the materials have been assembled, the leg opening 14 is punched out in a 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 in the flow direction of the main web is provided.
, The web is side-sealed in the side sealing step section 54, and then cut into individual disposable pants in the cutting step section 55 (cutting step) and finally accumulated.

Thus, the disposable pants 1 according to the embodiment of the present invention are manufactured, and continuous three-dimensional cuffs 20A and 20B are formed on the disposable pants 1. According to such a manufacturing method, it is possible to reduce the number of webs and steps of the three-dimensional cuffs 20A and 20B, which contributes to space saving of a processing machine. Furthermore, according to the manufacturing method of the present embodiment, by utilizing the folding of the back web (top sheet or back sheet), the arrangement accuracy of the three-dimensional cuffs can be improved, and the space for the processing machine equipment can be reduced.

[0026] Incidentally, examples of disposable pants about the these books onset Ming, he is needless to say that arbitrarily change implemented without departing from the scope of the present invention. For example, a configuration in which a tearing guide means is arranged adjacent to the side seal portion of the disposable pants 1 so as to be easily peeled off from the wearer may be adopted. The tear guide means may be a cut guide line, a seal portion, or a material that can be easily torn, but it is necessary that the tear guide means has a strength that does not break or tear during wear. .

In the production of the disposable pants according to the present invention, the three-dimensional cuff may be formed separately from the web, and the waist elastic member may be arranged on the web and then joined to the web. The three-dimensional cuff need not use a cuff elastic member as long as the sheet member 24 itself has elasticity.

[0028]

According to the disposable pants of the present invention, the excrement is prevented from leaking from the waist opening, and the waste liquid is not retained in the waist opening .

According to the disposable pants of the present invention,
It is possible to eliminate bleeding leakage from the waist due to formation of a gap due to gathering, and to provide an inexpensive product having an excellent flap texture. Further, excrement can be prevented by the three-dimensional cuff.

[Brief description of the drawings]

FIG. 1 is a plan view showing a deployed 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. 1;

FIG. 3 is a sectional view taken along line XX shown in FIG. 2;

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

[Explanation of symbols]

 Reference Signs List 1 disposable pants 2 top sheet 3 back sheet 4 absorber 8A, 8B, waist elastic member 20A, 20B three-dimensional cuff 23 cuff elastic member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61F 13/15-13/84

Claims (7)

(57) [Claims] 1. A body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the two sheets, wherein the body is placed on the abdomen of the wearer when worn. The waist opening and the pair of leg openings are divided into an abdominal part located on the back side and a dorsal part located on the dorsal side. And a waist elastic member is arranged over the entire circumference of the opening adjacent to the waist opening, and an elastic elastic three-dimensional cuff is formed inside the waist opening. A pair of left and right sides of the abdominal part and the dorsal part, extending from below the waist elastic member toward the crotch part and extending outward in the width direction from both longitudinal edges of the absorber. At least the flap A side elastic member forming a gather is disposed at the center in the longitudinal direction, and a side flap of the pair of leg portions includes a leg elastic member forming a gather at each of the pair of leg openings, At least two leg elastic members are provided, and each of the leg elastic members is disposed so as to have a portion overlapped with the absorber from one of the leg portions to the other of the leg portions. Disposable pants. 2. The disposable underpants according to claim 1, wherein the three-dimensional cuff is provided with elastic elasticity by stretching an elastic member in a width direction. 3. The disposable pants according to claim 1, wherein the waist elastic member includes a plurality of linear elastic members. 4. The three-dimensional cuff is formed by extending an elastic member on a part of the back sheet and positioning the elastic member below the waist elastic member inside the waist opening. The disposable pants according to claim 2 or 3, wherein: 5. The three-dimensional cuff is formed by extending an elastic member on a part of the top sheet and positioning the elastic member below the waist elastic member inside the waist opening. The disposable pants according to claim 2 or 3, wherein: 6. The disposable pants according to claim 1, wherein the three-dimensional cuff is formed continuously over the entire circumference. 7. The leg elastic member, one of which is curvedly disposed on the abdominal side of one of the leg portions and crosses the crotch in the width direction of the absorbent body, and the other of the leg elastic members. The other leg is curved on the abdominal side of the leg, and the other one is curved on the dorsal side of the other leg, and the crotch is the width of the absorbent body. The disposable pants according to any one of claims 1 to 6, characterized in that the disposable pants are arranged so as to be curved to the back side of the other leg portion across the direction.