JP2005154923A - Sanitary shorts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide sanitary shorts having function of absorbing excreted liquid from the body of a wearer such as urine in incontinence or menstrual blood in the period of menstruation, and excellent in leakage proof properties, wearability and wearing feeling. <P>SOLUTION: The sanitary shorts 1 are provided with the following: a shorts main body 10 formed of stretchable nonwoven fabrics 21, 31, 41, and having a waist opening part 5 and a pair of leg opening parts 6, 6; and a front body part 2; a back body part 3; and a crotch part 4 positioning between the front body part and the back body part. The crotch part 4 is provided with an absorption layer 7 comprising a hydrophilic fiber-containing sheet 71, and the absorption layer 7 is provided with a liquid-impermeable and moisture-permeable leakage-preventive layer 8 at the side facing the wearer's skin. The water absorption capacity of the absorption layer is 200-500 g/m<SP>2</SP>, and the bending strength of the crotch part 4 is 2.0 gf ×cm<SP>2</SP>/cm. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to sanitary shorts that have the ability to absorb effluent from the body, such as urine at the time of incontinence and menstrual blood during menstruation, have excellent leakage prevention properties, and are excellent in wearability and wearing feeling.

Conventionally, sanitary shorts used for fixing an absorbent article such as a sanitary napkin or an incontinence pad and fitting the absorbent article to a wearer's body are known.
For example, Patent Document 1 describes sanitary shorts which are made of a stretchable nonwoven fabric having a specific structure and whose basis weight is within a specific range.

JP 2000-60900 A

However, this sanitary short is used by fixing a sanitary napkin, an incontinence pad or the like, and does not itself have an absorption performance. Therefore, if menstrual blood or urine leaks from these due to a sanitary napkin or incontinence pad misalignment, the liquid leaks easily from the shorts, causing the clothes to become dirty.
Therefore, it is conceivable that sanitary shorts are provided with an absorbent body similar to the absorbent body used in sanitary napkins and the like to provide absorption performance. A feeling of wearing gets worse.

  Therefore, the object of the present invention is to absorb the drainage fluid from the body, such as urine at the time of incontinence and menstrual blood during menstruation, and is excellent in leakage prevention, and excellent in wearability and wearing feeling. To provide sanitary shorts.

The present invention comprises a shorts body composed of a stretchable nonwoven fabric and having a waist opening and a pair of leg openings, and a sanitary short having a front part, a back part and a crotch part located between the two. The part is provided with an absorbent layer made of a sheet containing hydrophilic fibers, and a liquid-impermeable and moisture-permeable leak-proof layer is provided on the non-skin facing side of the absorbent layer. The object is achieved by providing a sanitary short having a water absorption capacity of 200 to 500 g / m ² and a bending rigidity of the crotch part of 2.0 gf · cm ² / cm or less.

  According to the present invention, sanitary shorts that have the ability to absorb effluent from the body, such as urine during incontinence and menstrual blood during menstruation, are excellent in leakage prevention, and are excellent in wearability and wearing feeling. Can be provided.

The present invention will be described below based on preferred embodiments with reference to the drawings.
As shown in FIGS. 1 and 2, an incontinence shorts 1 according to an embodiment of the present invention includes a front body 2, a back body 3, and a crotch portion 4 positioned between the front body 2 and the back body 3. The waist part 5 and the pair of leg openings 6 and 6 are formed by joining the side edges of the front body 2 and the side edges of the back part 3 together by stitching. The incontinence shorts 1 is provided with an absorption layer 7 and a leak-proof layer 8 which will be described later on a shorts body 10 composed of stretchable nonwoven fabrics 41, 42 and 43. The shorts body 10 has a form having a waist opening 5 and a pair of leg openings 6 and 6 (shorts-type form).

  The shorts body 10 in the present embodiment is composed of a stretchable nonwoven fabric in which a nonwoven fabric layer is stitched and stitched with a knitting yarn containing stretchable fibers. In other words, the portions forming the front body 2, the back body 3 and the crotch part 4 of the shorts body 10 are stretchable nonwoven fabrics 21 and 31, respectively, in which a nonwoven fiber layer is stitched and sewn with a knitting yarn containing stretchable fibers. , 41.

  As an elastic nonwoven fabric in which a nonwoven fiber layer is stitched and stitched with a knitting yarn containing elastic fibers, for example, “Nonwoven fiber layer is stitched and stitched with a knitting yarn containing elastic fibers”. Can be used.

  The non-woven fiber layer is formed by entanglement of constituent fibers, and polyester, nylon, polypropylene, vinylon, cupra, acrylic, rayon, cotton or the like can be used as the constituent fiber. The constituent fibers may be all the same type or different types of fibers, and the constituent fibers may be either filament yarns or short fibers.

The stretchable fiber is a composite-spun crimped fiber by a combination of a low-viscosity polymer and a high-viscosity polymer, a composite-spun crimped fiber by a combination of different polymers, a composite-spun crimped fiber by a bimetal structure, or the like by crimping This refers to high-processed yarns, highly elastic rubber yarns (latex), polyurethane elastic yarns, and the like.
The knitting yarn includes such a stretchable fiber. The knitting yarn may be used as a bare yarn, or may be covered with other natural fibers or synthetic fibers. Also good.

  It is also preferable to knit the knitting yarn containing elastic fibers and other fibers. As the knitting yarn, synthetic fiber filament yarn, coated elastic yarn and the like can be preferably used. The content of the knitted yarn in the entire nonwoven fabric is preferably in the range of 30% to 65%. In the present specification, “%” is by weight unless otherwise specified.

The knitted structure of the elastic nonwoven fabric is formed by knitting elastic fibers and knitting yarn using a plurality of sheaths, for example, two sheaths (2 bars) or three sheaths (3 bars). Is preferred. Specifically, a chain knitting having a large elongation in the vertical direction, a 1-2 needle swing knitting in which the elongation in the horizontal direction is obtained, a satin knitting or an atlas knitting in which the elongation in both the vertical and horizontal directions can be obtained, and the like can be adopted.
The stitch stitching means a state in which the non-woven fiber layer is sandwiched between the stretchable fibers as the front yarn (front bar or L1) and the knitting yarn as the back yarn (backbar or L2). For stitch stitching, for example, a commercially available Russell warp knitting machine can be used. As the nonwoven fiber layer before stitch stitching, a spunlace nonwoven fabric, a needle punched nonwoven fabric, a spunbonded nonwoven fabric, or the like can be used.
The stretchable nonwoven fabric uses, for example, a polyester filament yarn having a single fiber denier of 0.1 denier or more and 3.5 denier or less as a constituent fiber, and has a spunbond type basis weight (weight per unit area) of 15 g / m ² or more. It can be obtained by obtaining a raw nonwoven fabric in a range of 50 g / m ² or less and stitching the raw nonwoven fabric with a knitting yarn containing stretchable fibers and a knitting yarn.

  In the shorts main body 10 in this embodiment, the front body 2, the back body 3, and the crotch part 4 are formed of a single elastic nonwoven fabric 21, 31, 41, respectively. As shown in FIG. 3, an absorption layer 7 made of a sheet 71 containing hydrophilic fibers is provided on the skin facing surface side of the part, and the non-skin facing surface side of the absorption layer 7, specifically, absorption. Between the layer 7 and the stretchable nonwoven fabric 41, a liquid-impermeable and moisture-permeable leak-proof layer 8 is provided. The skin facing surface and the non-skin facing surface are the surface facing the wearer's skin side and the surface facing the opposite side of each member, and are provided on the skin facing surface side (or the non-skin facing surface side). The expression “being” includes both the case where no other member is interposed between the skin facing surface (or the non-skin facing surface) and the case where it is interposed.

  The sheet 71 constituting the absorbent layer 7 is a sheet containing hydrophilic fibers. Sheets containing hydrophilic fibers include knitted fabrics, woven fabrics, and nonwoven fabrics produced by various known production methods, but do not include paper.

  A preferred sheet 71 is a knitted fabric or a woven fabric, and a particularly preferred sheet 71 is a knitted fabric. The sheet 71 preferable as the nonwoven fabric maintains the shape of the nonwoven fabric only by the entanglement of the constituent fibers, and is, for example, a spunlace nonwoven fabric, a needle punched nonwoven fabric, or a wet spunbond nonwoven fabric. By using such a nonwoven fabric for the absorbent layer 7, it is possible to reduce the rigidity of the crotch portion of the shorts 1 while maintaining the absorption capacity, and to improve the wearing feeling during wearing. However, a nonwoven fabric such as a chemical bond or a thermal bond can be used as the sheet 71 constituting the absorption layer.

  The hydrophilic fiber contained in the sheet 71 is to impart liquid absorption performance to the absorbent layer 7. As the hydrophilic fiber, a hydrophobic synthetic fiber such as polyethylene, polyester, polypropylene, etc. is hydrophilized with an activator or the like. Various known hydrophilic fibers such as those subjected to the above are used, but in the case of obtaining shorts that can be reused by washing after use, the sheet 71 is hydrophilic from the viewpoint of preventing a decrease in absorption performance due to washing. It is preferable to contain cellulosic fibers such as rayon fiber, cotton fiber and hemp as the fiber. Further, when the sheet 71 is a non-woven fabric, the strength between the fibers constituting the fabric is weaker than that of the woven fabric or the knitted fabric. Therefore, the hydrophilic fiber should be a continuous filament or a fiber having a fiber length of 30 mm or more. It is preferable from the viewpoint of washability.

The content of hydrophilic fibers in the sheet 71 is preferably 50 to 100%, particularly preferably 80 to 100%.
The sheet 71 may include fibers other than hydrophilic fibers, and examples of fibers other than hydrophilic fibers include hydrophobic synthetic fibers such as acrylic fiber, polyethylene, polyester, and polypropylene. It is preferable to mix hydrophobic synthetic fibers because washing resistance can be improved. When the hydrophobic synthetic fiber is contained, the content of the synthetic fiber in the sheet 71 containing the hydrophilic fiber is preferably 0 to 50%, particularly preferably 0 to 20%.

  In addition, when washing after use to obtain reusable shorts, the same absorption performance as unused shorts is obtained after washing, and there is a risk that the polymer may fall off during washing and contaminate other laundry with the polymer. From a certain point of view, it is preferable that the absorbent layer 7 does not contain a superabsorbent polymer that is widely used in absorbent bodies such as disposable diapers and sanitary napkins. It is preferable not to contain pulp fibers from the viewpoints of not collapsing, and preventing fluffing and fiber peeling due to an adhesive for preventing displacement such as incontinence pads and sanitary napkins used in combination. The pulp fiber here is fluff pulp having a fiber length of 5 mm or less obtained by mechanically opening a pulp base paper.

  In addition, as the stretchable nonwoven fabric constituting the shorts body, a stretchable nonwoven fabric other than “a nonwoven fabric in which the nonwoven fiber layer is stitched and sewn with a knitting yarn containing a stretchable fiber” can be used, for example, urethane, polyolefin, etc. Elastic nonwoven fabric such as spunbond nonwoven fabric using the above elastomer resin, elastic laminated nonwoven fabric obtained by bonding two non-elastic nonwoven fabrics on both sides of stretched elastic film by hot melt, heat embossing, ultrasonic embossing, 2 sheets It is also possible to use an elastic yarn stretched between the non-stretchable non-woven fabrics, a stretchable non-woven fabric in which an elastic net is joined by hot melt or the like.

In the incontinence shorts (sanitary shorts) 1 of this embodiment, the water absorption capacity of the absorbent layer 7 is 200 to 500 g / m ² , and the bending rigidity of the crotch part 4 in the shorts width direction is 2.0 gf · cm ² / cm. It is as follows.

When the absorption capacity of the absorbent layer 7 is less than 200 g / m ² , either when a sanitary napkin or an incontinence pad is fixed on the skin contact surface side of the crotch part 4 or when shorts are used alone In this case, the absorption performance becomes insufficient, and there is a risk of the clothes being soiled by the liquid leaking from the shorts. When the absorption capacity of the absorption layer 7 is more than 500 g / m ² , it is difficult to suppress the bending rigidity of the crotch part 4 within the above range.

If the flexural rigidity of the crotch part 4 is more than 2.0 gf · cm ² / cm, the wearability and / or the wearing feeling is inevitably deteriorated.

In addition, from the viewpoint of obtaining good wearability and / or wearing feeling while ensuring sufficient absorption performance, the absorption capacity of the absorbent layer 7 is particularly preferably 300 to 500 g / m ² , The bending rigidity is preferably 2.0 gf · cm ² / cm or less, particularly preferably 0.8 gf · cm ² / cm or less. Further, the basis weight of the absorbent layer 7 is 20 to 20 from the viewpoint of obtaining good wearability and / or wearing feeling by suppressing the thickness and rigidity of the absorbent layer 7 while ensuring sufficient absorbent performance for the absorbent layer 7. 100 g / m ^2, it is particularly preferably 50 to 100 g / m ^2.

The absorption capacity of the absorption layer 7 can be measured as follows.
The absorbent layer 7 is immersed in ion-exchanged water for 30 minutes, then suspended for 30 minutes, the water is cut off, and the weight is measured. By subtracting the weight before immersion, the unit is converted to the absorption capacity per square meter.

The bending rigidity of the crotch part 4 can be measured as follows.
A sample was cut out from the crotch portion, for measuring the flexural rigidity in the range of curvature -2.5cm ^-1 ~ + 2.5cm ^-1 using KES-FB2 of Kato Tech Co., Ltd..
The bending rigidity of the crotch part 4 is preferably such that the bending rigidity in at least the width direction of the shorts longitudinal direction (vertical direction in FIG. 2) and the width direction (horizontal direction in FIG. 3) is within the above range. When the is moved back and forth, the longitudinal direction of the crotch part is also deformed. Therefore, it is more preferable that the bending rigidity in both directions is within the above range in order to obtain a good fit without causing a sense of discomfort in the crotch part.

The leak-proof layer 8 in this embodiment is formed by disposing a liquid-impermeable and moisture-permeable leak-proof sheet 81 on the skin facing surface side of the stretchable nonwoven fabric 41 constituting the crotch part 4.
As the leak-proof sheet 81, various known moisture-permeable sheets conventionally used as a back sheet such as a disposable diaper can be used. For example, a diffusivity such as a microporous film, polyurethane or polyester film is used. Nonporous moisture permeable film and the like. The microporous film is formed by melt-kneading a hydrophobic thermoplastic resin and a fine inorganic filler made of calcium carbonate or the like, or an organic polymer incompatible with the thermoplastic resin, and the like. Is obtained by uniaxial or biaxial stretching.
The moisture permeability of the leak-proof sheet 81 is preferably 1.0 g / (100 cm ² · hr) or more as measured by JIS Z 0208.

The stretchable nonwoven fabric 41, the sheet 71, and the leak-proof sheet 81 in the present embodiment have the same shape in plan view, and are integrated in the thickness direction by stitching at the front and rear ends 42, 43 and both side edges 44, 44. The front and rear ends 42 and 43 are also stitched to the stretchable nonwoven fabrics 21 and 31 of the front body 2 and the back body 3. That is, the leak-proof sheet 81 is joined to the stretchable nonwoven fabric 41 only at the stitched portion formed at the peripheral portion thereof, and can be separated from the stretchable nonwoven fabric 41 inside the peripheral portion (stitched portion). Has been made.
Since it has such a structure, the rigidity of the crotch part 4 can be restrained low compared with the case where the opposing surfaces of the leak-proof sheet 81 and the elastic nonwoven fabric 41 are joined together. Further, the stretchability of the stretchable nonwoven fabric 41 constituting the crotch part 4 can be prevented from being damaged by the leakproof sheet 81.

  Further, the sheet 71 is also bonded to the leak-proof sheet 81 and the stretchable nonwoven fabric 41 only at the stitched portion formed at the peripheral edge portion, and the leak-proof sheet 81 is connected to the inside of the peripheral edge portion (the stitched portion). Separation is possible. Since it has such a structure, the rigidity of the crotch part 4 can be restrained low compared with the case where the opposing surfaces of the sheet | seat 71 and the leak-proof sheet | seat 81 are joined to the whole surface.

  From the viewpoint of obtaining good wearability and / or wearing feeling while ensuring sufficient absorption performance in the crotch part 4, the minimum width W (see FIG. 3) of the crotch part 4 is preferably 80 to 110 mm. The width W1 (see FIG. 3) of the absorbent layer 7 at the portion where the width of the crotch 4 shows the minimum value is preferably 80 to 110 mm, and the ratio (W1 / W) of both is 0.9 to 1. 0.0 is preferable. From the same viewpoint, the length L1 of the absorbent layer 7 in the longitudinal direction of the crotch part 4 is preferably 150 cm or more. The widths W and W1 and the length L1 are measured in the unfolded and natural state (a state where no external force is applied) shown in FIG.

  The stretchable nonwoven fabrics 21, 31, and 41 used in the present embodiment are each a highly stretchable and highly stretchable in-plane and a low stretch that is orthogonal to the high stretch direction and inferior in stretchability to the high stretch direction. The stretchable nonwoven fabrics 21, 31, and 41 constituting the front body 2, the back body 3, and the crotch part 4 of the shorts body 10 are all short in the high stretch direction. It corresponds to the width direction (left-right direction in FIG. 2). When the high stretch direction of the stretchable nonwoven fabric 41 forming the crotch part 4 coincides with the longitudinal direction of the shorts (vertical direction in FIG. 2), the crotch part 4 tends to bite into the valley of the buttocks while wearing, Such inconvenience can be prevented if the high expansion and contraction direction of the nonwoven fabric 41 coincides with the width direction of the shorts.

  The incontinence shorts 1 of the present embodiment is provided with the absorption layer 7 in the crotch part 4, so that incontinence urine can be absorbed even when used alone, and the presence of the moisture-permeable leak-proof layer 8 is present. Thus, incontinence urine and the like can be prevented from leaking outside while suppressing the occurrence of stuffiness. Further, the incontinence pad can be used by being fixed to the inner side of the crotch part. Even in such a case, when urine leaks due to displacement of the incontinence pad or the like, the urine can be absorbed and retained in the absorption layer of the shorts, and the clothes can be prevented from being soiled by the urine leaked from the shorts.

Moreover, since the absorption capacity of the absorption layer 7 and the bending rigidity of the crotch part 4 are within the specific range described above, it is possible to obtain a good mounting property and / or mounting feeling while ensuring sufficient absorption performance. Moreover, since the shorts main body 10 is comprised from the elastic nonwoven fabric, especially the elastic nonwoven fabric 21,31,41 of the specific structure mentioned above, it is especially excellent in mounting property and a feeling of mounting.
Moreover, since the absorption layer 7 is comprised from the sheet | seat 71 containing a hydrophilic fiber, it can reuse after wash | cleaning and drying the shorts after use. It is preferable that such washing and subsequent use can be repeated at least once, preferably about 2 to 5 times.

  In addition, in the incontinence shorts 1 of the present embodiment, elastic members 51 and 61 that are different from the stretchable nonwoven fabrics 21, 31, and 41 are attached to the opening peripheral portions of the pair of leg openings 6 and 6, These openings are provided with circumferential stretchability. The elastic member 61 is a composite elastic member composed of a belt-like sheet and a plurality of long elastic members fixed to the sheet, and as shown in FIG. It is fixed to the non-skin facing side. In the opening peripheral part of the waist opening part 5, it has the two-layer structure part formed by folding back the elastic nonwoven fabrics 21 and 31, and thereby the elastic force in the circumferential direction is enhanced. The interlayer of the two-layer structure portion is stitched with a thread 51.

As mentioned above, although preferable embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above.
For example, in the above-described embodiment, the leak-proof layer 8 is formed by disposing the separate leak-proof sheet 81 on the skin facing surface side of the stretchable nonwoven fabric 41 that forms the crotch part 4. The leak-proof layer 8 can also be formed by laminating a molten resin on the skin facing surface or the non-skin facing surface of the stretchable nonwoven fabric 41. The stretchable nonwoven fabrics 21, 31, 41 may be a single continuous nonwoven fabric. Further, the stretchable nonwoven fabric 41 forming the crotch part 4 may be matched with the longitudinal direction instead of matching the high stretch direction with the width direction of the diaper. In this case, the stretchability in the circumferential direction of the leg opening edge is improved, and the size adaptation range around the leg is widened.
A composite elastic member such as the elastic member 61 may be attached to the opening peripheral edge of the waist opening 5, and a thread-like elastic member is fixed to the opening peripheral edge of the leg opening 6 instead of the elastic member 61. May be.

  The sanitary shorts of the present invention may be sanitary shorts in addition to incontinence shorts, and the sanitary shorts may be used with a known sanitary napkin or liner fixed to the inner surface. May be used alone.

It is a perspective view which shows the shorts for incontinence as one Embodiment of this invention. It is the top view which looked at the development state of shorts for incontinence shown in Drawing 1 from the non-skin opposing surface side. FIG. 3 is a sectional view taken along line XX in FIG. 2.

Explanation of symbols

1 Incontinence shorts (Sanitary shorts)
2 Front Body 3 Back Body 4 Crotch 41 Elastic Nonwoven Fabric 7 Absorbent Layer 71 Nonwoven Fabric Containing Hydrophilic Fiber 8 Leakproof Layer 81 Leakproof Sheet 10 Shorts Body

Claims (6)

In a sanitary shorts composed of a stretchable nonwoven fabric, comprising a shorts body having a waist opening and a pair of leg openings, and having a front part, a back part and a crotch part located between them,
The crotch part is provided with an absorbent layer made of a sheet containing hydrophilic fibers, and a liquid-impermeable and moisture-permeable leak-proof layer is provided on the non-skin facing surface side of the absorbent layer,
Sanitary shorts in which the water absorption capacity of the absorbent layer is 200 to 500 g / m ² , and the flexural rigidity of the crotch part is 2.0 gf · cm ² / cm or less. The sanitary shorts according to claim 1, wherein the stretchable nonwoven fabric is a nonwoven fabric in which a nonwoven fiber layer is stitched and sewn with a knitting yarn containing shrinkable fibers. The sanitary short according to any one of claims 1 and 2, wherein the sheet containing the hydrophilic fiber includes a cellulosic fiber as the hydrophilic fiber. The sanitary shorts according to any one of claims 1 to 3, wherein the sheet containing the hydrophilic fiber is a non-woven fabric that is made into a non-woven fabric only by entanglement of constituent fibers. The minimum width W of the crotch part is 80 to 110 mm, the width W1 of the absorbent layer in the part where the width of the crotch part shows the minimum value is 80 to 110 mm, and the ratio (W1 / W) between them is The sanitary short according to any one of claims 1 to 4, which is 0.90 to 1.00. The leak-proof layer is formed by arranging a liquid-impermeable and moisture-permeable leak-proof sheet on the skin facing surface side of the stretchable nonwoven fabric constituting the crotch part, The sanitary short according to any one of claims 1 to 5, wherein the sanitary shorts are joined to the stretchable nonwoven fabric at a peripheral portion and are separable from the stretchable nonwoven fabric inside the peripheral portion.

Images