JP2002242001A - Disposable undergarment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable undergarment where openings around the legs are formed without cutting the both sides of the crotch part into a semicircular shape, enabling waste of fabric to be eliminated. SOLUTION: This disposable undergarment has a crotch part 4 longitudinally spread, and a first and a second waist parts 5 and 6 continuously formed at the both sides of the crotch part 4, wherein the vicinity of the leading edge 7 of the vertically extending waist parts 5 and 6 and the vicinity of the trailing edge 8 of the vertically extending waist parts 5 and 6 are fixed to each other, and openings 3 around the legs comprise a slits 11 longitudinally extending at both sides of the crotch part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable undergarments such as incontinence pants, sanitary pants, and infant training pants.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open Publication No. 7-43075 discloses a front waist portion and a rear waist portion which are formed from a fibrous nonwoven fabric having elasticity at least in the vertical and horizontal directions and extend vertically. Disclosed is a pants-type disposable undergarment having a crotch portion that is positioned and extends back and forth, and has both side edges of the front and rear waist portions fixed to define a waist opening and a pair of leg openings. I have.

In this under garment, a band-shaped elastic region is formed by applying an elastic member having rubber elasticity in a hardened state to the periphery of the leg opening, and the elongation stress of the periphery of the leg opening is reduced by the residual stress excluding the periphery. It is higher than that of the area.
In this under garment, the periphery of the leg circumference opening does not separate from the wearer's leg circumference, and it closely adheres to the wearer's leg circumference.

[0004]

The undergarment disclosed in the same publication has a substantially circular opening around the leg. To form such an opening around the leg, the undergarment is formed on both sides of the crotch portion. Must be cut into a semicircle, and the fabric is wasted by that much.

[0005] It is an object of the present invention to provide a disposable undergarment capable of forming an opening around a leg without cutting both sides of a crotch portion into a semicircular shape and reducing waste of cloth.

[0006]

The premise of the present invention for solving the above-mentioned problem is a disposable undergarment which is formed from elastic and stretchable cloth and has a waist opening and a pair of leg openings. .

[0007] The feature of the present invention on this premise is that the undergarment is a crotch portion extending forward and backward, and first and second waist portions extending vertically opposite to each other while being continuously connected to both sides of the crotch portion. In the undergarment, the vicinity of the front edge of the waist portion extending vertically between the front end of the crotch portion and the waist opening is fixed to each other, and the rear end of the crotch portion and the waist portion The vicinity of the rear edge of the waist portion extending vertically between the openings is fixed to each other, and the leg opening is formed of a slit located on both sides of the crotch portion and extending forward and backward between the front and rear edges. That is being done.

In one embodiment of the present invention, the slit extends so as to gradually approach the waist opening from the front end to the rear end of the crotch portion.

As another example of the embodiment of the present invention,
The leading edge and the trailing edge of the first and second waist portions extend in an arc so as to gradually approach from the waist opening toward the crotch portion.

As an example of an embodiment of the present invention, a leg elastic member extending forward and backward is attached near the slit of the undergarment which is in a substantially non-extended state.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the disposable undergarment according to the present invention will be described with reference to the accompanying drawings.
It is as follows.

FIGS. 1 and 2 are a perspective view of the under garment 1 as viewed from the front and a developed plan view of the under garment 1 as viewed from the inner side. In FIG. 1, the front-back direction is indicated by an arrow X, and the up-down direction is indicated by an arrow Y. In addition, the inner surface of the undergarment 1 refers to a surface facing the wearer's skin, and the outer surface thereof refers to a surface not facing the wearer's skin.

The under garment 1 is formed of a material having elasticity and elasticity, and has a waist opening 2 and a pair of leg openings 3. The under garment 1 has a crotch portion 4 extending in the front-rear direction, and first and second waist portions 5, 6 extending vertically opposite to each other. Under garment 1
In the first embodiment, the first and second waist portions 5 and 6 are continuously connected to both sides of the crotch portion 4.

In the under garment 1, the first and second waist parts 5, 6 are fixed in a watertight manner in a state where the front edges 7 of the first and second waist parts 5 and 6 are overlapped in a palm-shape manner.
The rear edge 8 is fixed in a watertight manner in a state of being overlapped in a palm shape. The front edge 7 extends vertically between the front end 9 of the crotch portion 4 and the waist opening 2. The rear edge 7 extends vertically between the rear end 10 of the crotch portion 4 and the waist opening 2. The front edge 7 and the rear edge 8 extend in an arc so as to gradually approach from the waist opening 2 toward the crotch portion 4.

The leg opening 3 is formed by a pair of slits 11 located on both sides of the crotch portion 4 and extending front and rear. The slit 11 extends straight between the front and rear edges 7 and 8. The slit 11 extends so as to gradually approach the waist opening 2 from the front end 7 to the rear end 8 of the crotch portion 4. The slit 11 is preferably formed at a position between the leading edge 7 and the trailing edge 8, which is offset toward the leading edge 7.

In FIG. 2, the slit 11 extends so as to be gradually separated from the front end 7 to the rear end 8 of the crotch portion 4. In the under garment 1, as shown in FIG. 2, a line Z1 extending forward and backward by bisecting the crotch portion 4 and a line Z2 assuming that the slit 11 is extended in the direction of the trailing edge 7.
Is preferably in the range of 20 to 45 °.

To make the undergarment 1 from the plan view of FIG. 2, the crotch portion 4 is bent along the line Z1 so that the inner surfaces of the first and second waist portions 5, 6 abut against each other, and the first and second crotch portions are bent. The vicinity of the front and rear edges 7, 8 of the second waist parts 5, 6 is fixed.

In the vicinity of the slit 11, a band-shaped elastic member 12 for leg circumference extending in the front and rear direction in parallel with the slit 11 is attached in a substantially non-extended state. In the undergarment 1, the leg-surrounding elastic member 12 may be attached to the vicinity of the slit 11 in a state where the elastic member 12 is extended forward and backward. A belt-shaped elastic member 13 for the waist surrounding the waist opening 2 is attached to the periphery of the waist opening 2 in an extended state. When the elastic members 12 and 13 are attached, the under garment 1 is in a substantially non-extended state.

In the undergarment 1, since the leg opening 3 is formed by the slits 11 extending in the front-rear direction, there is no need to cut the cloth, and waste of the cloth can be eliminated. In the undergarment 1, the slit 11 extends from the front end 7 of the crotch portion 4 toward the rear end 8 so as to approach the waist opening 2, so that the area of the crotch portion 4 on the side of the rear end 8 is reduced to the side of the front end 7. Can be made larger than that of the crotch portion 4. In Under Garment 1,
The rear end 8 side of the crotch portion 4 covers the wearer's crotch widely.

In this under garment 1, the peripheral length of the leg opening 3 can be changed only by adjusting the length of the slit 11. In the under garment 1, the crotch 4
Can be changed in width. Further, in the under garment 1, the leg elastic members 12
Is attached, the extension stress at the peripheral edge of the leg opening 3 can be increased, and the adhesion of the peripheral edge of the leg opening 3 to the periphery of the wearer's leg can be improved.

FIGS. 3 and 4 are a perspective view showing an embodiment of the undergarment 1 and a sectional view taken along line AA of FIG. A liquid-absorbent pad 14 for absorbing and retaining bodily fluid is attached to the inner surface of the undergarment 1.

The pad 14 extends back and forth around the crotch portion 4 toward the waist opening 2. The pad 14
A liquid-permeable top sheet 15, a liquid-impermeable back sheet 16,
The absorbent core 17 interposed between the sheets 15 and 16
And is formed from The core 17 is joined to the top sheet 15 and the back sheet 16. In pad 14,
Those sheets 1 extending outward from the periphery of the core 17 in the circumferential direction
The peripheral portions of 5, 16 are fixed watertight.

An adhesive 18 is intermittently applied to the outer surface of the back sheet 16. The pad 14 is attached to the inner surface of the under garment 1 via an adhesive 18.
In the undergarment 1, in addition to the pad 14, a sanitary napkin can be used by attaching it to the inner surface thereof.

The fabric forming the undergarment 1 includes a stretchable and hydrophobic fibrous nonwoven fabric, a stretchable and liquid-impermeable plastic film, a stretchable and hydrophobic fibrous nonwoven fabric, and a two-layer nonwoven fabric. Either a composite sheet obtained by laminating a hydrophobic fibrous nonwoven fabric having elasticity and a liquid-impermeable plastic film, or a woven fabric having elasticity can be used. Elastic member 12,
For 13, a stretchable and hydrophobic fibrous nonwoven fabric, or a strip-like or thread-like elastomer can be used.

As the stretchable fibrous nonwoven fabric, those manufactured by melt blown or spun bond processes can be used. As the constituent fibers of the stretchable fiber nonwoven fabric, stretchable fibers obtained by melting and spinning a thermoplastic elastomer resin can be used. Further, at least one surface of a hydrophobic fiber nonwoven fabric made of thermoplastic elastomer resin fibers, polypropylene, polyethylene, polyester,
A composite nonwoven fabric obtained by laminating a hydrophobic fiber nonwoven fabric composed of crimped fibers obtained by melting and spinning any of the thermoplastic synthetic resins described above can also be used.

The topsheet 15 has a hydrophilic fiber non-woven fabric,
Alternatively, a plastic film having a large number of fine openings can be used. As the back sheet 16, any of a hydrophobic fiber nonwoven fabric, a liquid-impermeable plastic film, and a composite sheet in which a plastic film is fixed to a hydrophobic fiber nonwoven fabric can be used.

As the non-woven fabric forming the front and back sheets 15 and 16, those manufactured by each of spunlace, needle punch, melt blown, thermal bond, spunbond, chemical bond, and air through methods can be used. . Polyolefin-based, polyester-based, polyamide-based fibers, core / sheath composite fibers or polyethylene / polyester core-in-sheath composite fibers or side-by-side composite fibers should be used as non-stretch nonwoven fabric constituent fibers. Can be.

The core 17 is a mixture of fluff pulp and superabsorbent polymer particles, or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and is compressed to a required thickness. The core 17 is preferably entirely coated with tissue paper in order to prevent the polymer particles from falling off or out of shape. As the polymer particles, starch-based, cellulose-based, and synthetic polymer-based particles can be used.

Although not shown, the undergarment has a stretchable and liquid-permeable top sheet located on the skin contact side and a stretchable and liquid-impermeable topsheet located on the non-skin contact side. It may be formed from a back sheet and an absorbent core interposed between the sheets. In this case, the peripheral portions of the sheets extending outward from the peripheral edge of the core are intermittently fixed so as not to hinder the elasticity of the front and back sheets,
It is preferable that the core is intermittently fixed to at least the inner surface of the front sheet of the front and back sheets. A stretchable and hydrophilic fiber nonwoven fabric can be used for the stretchable and liquid-permeable topsheet. The cloth that forms the undergarment 1 according to the embodiment can be used for the stretchable and liquid-impermeable back sheet.

The first and second waist parts 5, 6 are fixed, the front and back sheets 15, 16 are fixed, and the front and back sheets 15, 16 are fixed.
In order to join the core 17 and the elastic members 12 and 13 to each other, a hot-melt type adhesive or a welding means by heat such as heat sealing or ultrasonic bonding can be used.

[0031]

According to the disposable undergarment according to the present invention, since the opening around the leg is formed by the slit extending forward and backward, it is not necessary to cut the cloth, and waste of the cloth can be eliminated.

In this undergarment, since the slit extends from the front end of the crotch portion toward the rear end so as to approach the waist opening, the area of the crotch portion on the rear end side is reduced by the crotch portion on the front end side. Can be larger than that of

[Brief description of the drawings]

FIG. 1 is a perspective view of an under garment viewed from the front.

FIG. 2 is a developed plan view of the under garment shown from the inner surface side.

FIG. 3 is a perspective view showing an embodiment of the under garment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable undergarment 2 Waist opening 3 Leg opening 4 Crotch part 5 1st waist part 6 2nd waist part 7 Front edge 8 Rear edge 9 Front end 10 Rear end 11 Slit 12 Leg elastic member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) A61F 13/72 (72) Inventor Kinunori 1531-7 Wakahama Takasuka, Toyohama-cho, Mitoyo-gun, Kagawa Unicharm F-term in Technical Center Co., Ltd. (reference) 3B028 KA01 3B029 BD11 BF02 4C098 AA09 CC02 CC08 CC14 CE05 DD03 DD05 DD10 DD14 DD25 DD26

Claims (4)

[Claims] Claims: 1. An elastic and stretchable fabric,
A disposable undergarment having a waist opening and a pair of leg openings, wherein the undergarment is connected to both sides of the crotch portion extending forward and backward, and both sides of the crotch portion. And a second waist portion, and in the undergarment, near the front edges of the waist portions extending vertically between the front end of the crotch portion and the waist opening are fixed to each other, and The vicinity of the rear edge of the waist portion extending vertically between the rear end and the waist opening is fixed to each other, and the leg opening is located on both sides of the crotch portion and extends between the front and rear edges. The under garment described above, wherein the under garment is formed from a slit extending forward and backward. 2. The undergarment according to claim 1, wherein the slit extends so as to gradually approach the waist opening from the front end to the rear end of the crotch portion. 3. A front edge and a rear edge of the first and second waist portions extend in an arc so as to gradually approach from the waist opening toward the crotch portion. Item 3. An undergarment according to item 2. 4. The undergarment according to claim 1, wherein a leg-surrounding elastic member extending back and forth is mounted near the slit of the undergarment in a substantially non-extended state.