JPH05230770A - Water vapor permeable waterproof fabric - Google Patents

Abstract

PURPOSE:To obtain fabric having excellent ability for treating sweat caused by intense exercise and operation, preventing wind and rain from the outside. CONSTITUTION:Fabric comprises a surface layer, a middle layer and a back layer. The surface layer is composed of a water vapor permeable waterproof resin, the middle layer consists of ultra-fine fiber having 0.1-0.5 denier fineness of single fiber and containing 20-80wt.% hydrophilic fiber and the back layer is made of hydrophobic fiber having 1.0-5.0 denier fineness of single fiber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breathable waterproof cloth. More specifically, it relates to a cloth having excellent sweat absorption and a dry-textured, non-greasy feel, and is suitable for clothing in the outdoor field, particularly training clothing and sportswear materials such as competition clothing. ..

[0002]

2. Description of the Related Art Conventionally, as a water-repellent or waterproof cloth,
Lamination or coating of a urethane resin on one or both sides of a woven fabric made of thermoplastic synthetic fiber multifilaments has been carried out. This is because the urethane-based resin layer (film) has fine porosity, so that it has water repellency or waterproofness as well as moisture permeability. However, when such a cloth is used in sportswear, the sweat processing capacity decreases as the amount of sweat increases,
The generated sweat not only causes discomfort due to stickiness between the skin and the clothes, but also lowers the body temperature due to latent heat due to evaporation of water from the skin, which is not preferable in terms of health.

On the other hand, as a cloth having a sweat processing ability and less discomfort due to stickiness between the skin and clothes due to sweating, a layer made of a hydrophobic resin is provided on the back surface layer (the side in contact with the skin) of the cloth, A woven or knitted fabric having a two-layer structure is known in which a surface layer having a high ability to retain water is provided in the surface layer.
However, when such a cloth is used in sportswear, it has poor moisture permeability because perspiration is diffused from the back surface layer to the front surface layer and retained by the front surface layer during sweating. It is unsuitable for clothing because it is weak, and because the surface layer is an ultrafine fiber, it is inferior in color developability and is visually unfavorable.

[0004]

In view of the above situation, the present inventor has been excellent in waterproofness against moisture from the outside such as wind and rain without causing discomfort due to sticky skin and clothes due to sweating and reduction in body temperature. As a result of examination for the purpose of obtaining a cloth, the present invention has been achieved.

[0005]

The present invention is a fabric comprising three layers of a surface layer, an intermediate layer and a back layer, wherein the surface layer is made of a moisture-permeable waterproof resin and the intermediate layer is a single fiber fineness. Is 0.1
.About.0.5 denier and composed of ultrafine yarn containing 20 to 80% by weight of hydrophilic fiber, and the back surface layer has a monofilament fineness of 1.0 to 5.0 denier and is hydrophobic. It is a moisture-permeable waterproof fabric characterized by being composed of fibers.

Hydrophobic fibers having a monofilament fineness of 1.0 to 5.0 denier are used for the back layer (the side in contact with the skin) of the fabric according to the present invention. When the single fiber fineness is less than 1.0 denier, after absorbing the generated sweat, the transfer of sweat to the intermediate layer,
Immediate diffusion does not occur and the skin feels wet. Also,
If the single fiber fineness exceeds 5.0 denier, it will feel stiff and the texture will be very poor. Desirably 1.2-4.
It is 5 denier.

Examples of the hydrophobic fiber include polyester and polyolefin, and polyester having a small Young's modulus decrease is preferable. Among the polyesters, polyethylene terephthalate is particularly preferable in terms of processability, setting properties and the like. The shape of the fiber is not particularly limited, such as filament and staple, and it can be used alone or in combination of two or more kinds.

The intermediate layer has a monofilament fineness of 0.1 to 10.
An extra fine yarn of 0.5 denier is used. When the single fiber fineness is less than 0.1 denier, processability is poor in fabric production, and when it exceeds 0.5 denier, water retention is poor. It is preferably 0.2 to 0.4 denier.

Further, the intermediate layer needs to have the ability to absorb sweat quickly and retain the sweat, and therefore, it is necessary to include hydrophilic fibers as ultrafine yarns constituting the layer. The content of the hydrophilic fiber is 20 to 80% by weight with respect to the intermediate layer. If the content is less than 20% by weight, the ability to absorb and retain perspiration is insufficient, and if it exceeds 80% by weight, moisture such as perspiration continues to be retained in the intermediate layer and is not released from the surface layer to cause discomfort. Increase. In order for the intermediate layer to maintain such ability, the water repellency is 15 seconds or less [JISL1092:
Measurement by water repellency method (water drop method)] is preferable.

Examples of the polymer which becomes the hydrophilic fiber include polyamide such as nylon, rayon, polyester having hydrophilicity, etc. These may be used alone or in a mixture of two or more kinds. You may.

As the ultrafine yarn, for example, fibers obtained by directly spinning fibers are partially hydrophilically treated, split type polyester / polyamide mixed fibers, sea-island type polyester / polyamide fibers, polyester fibers and polyamide fibers. Although there are mixed multifilaments, etc., a split type polyester / polyamide mixed fiber is preferable because it has a small single fiber fineness and excellent water retention.

The surface layer is a moisture-permeable and waterproof resin layer, and is obtained by subjecting the surface of the intermediate layer to a moisture-permeable and waterproof treatment. Such treatment is carried out by a known method, for example, a spray method, a dipping method, a coating method, a laminate method using a moisture-permeable waterproof resin such as an acrylic type, a vinyl chloride type, a rubber type, a polyamide type or a urethane type. It can be performed by a method such as a method.

The fabric of the present invention has 3000 cc / m 2 · 24
Any of the above methods may be used as long as the moisture permeability of hr or more and the water pressure resistance of 300 mm (in water) or more can be imparted, and the thickness of the surface layer for imparting such performance is in the range of 0.1 to 10 μm. It is particularly preferable that the range is 1 to 5 μm.

In the fabric of the present invention, the intermediate layer and the back layer may be laminated in a two-dimensional structure such as a double woven fabric, a double knitted fabric or a pile knitted fabric, or a method in which each layer such as a woven or knitted fabric or a non-woven fabric is known. For example, it may have a structure that is laminated and integrated with an adhesive or the like, and is not limited. The laminated structure may be post-processed such as water repellent and hydrophilic.

The proportion of each layer in the fabric of the present invention is 5 to 40% by weight, particularly 10 to 30% by weight for the surface layer, 20 to 80% by weight for the intermediate layer, especially 30 to 70% by weight, and 1 for the backside layer.
It is preferably 5 to 75% by weight, and particularly 25 to 65% by weight from the viewpoints of the water retention capacity of sweat, the less sticky feeling, and the like.

When the fabric of the present invention is used in the upswear in the field of outdoor, sweating is promoted by vigorous exercise, and even if the humidity in the clothes rises, the cloth has moisture permeability so that the increase in humidity in the clothes is suppressed. Body temperature does not drop due to latent heat caused by evaporation of water from the skin. Further, the generated sweat is diffused from the back surface layer to the intermediate layer and once held in the layer, but is diffused from the moisture permeable surface layer, so that there is no sticky feeling due to sweat. Furthermore, since the surface layer is also waterproof, it is suitable for exercise in the wind and rain.

In the fabric of the present invention, the intermediate layer is composed of extra fine yarn with poor color development. However, since the outer layer, that is, the surface layer, is a resin layer, the color of the extra fine yarn can be obtained by coloring the layer. The defect is eliminated and it is also useful as a dark-colored fabric having a colorful hue.

The present invention will be described below with reference to examples, but the present invention is not limited to these examples. Example 1 and Comparative Examples 1 and 2 11 layers of 50 denier / 24 filament polyethylene terephthalate-nylon 6 laminated with 50 denier / 36 filament polyester fiber in the pile portion (back surface layer) Type composite fiber false twisted yarn A (nylon 6
Was used for the gland portion (intermediate layer) to prepare a tricot mesh, which was dyed according to a conventional method (Sample A). The ground part of sample A was dyed only in a light color. Also 50 denier / 3
A plain woven fabric was prepared from 6 filament polyester fiber and dyed according to a conventional method (Sample B).

Polyester type urethane film (3 μm) was applied to the ground surface of sample A and one surface of sample B.
(Thickness) was laminated by thermocompression bonding (Sample A, respectively)
', Sample B').

Sample A '(Example 1) had a surface layer of 2
It has a three-layer structure of 0% by weight, the intermediate layer is 40% by weight, and the back layer is 40% by weight.
It has a water vapor transmission rate of 4 hours and a water pressure resistance of 800 mm
The tote layer side was waterproof and water repellent, and had a windproof rain effect.
In addition, since sweat generated by intense exercise is diffused from the back layer to the intermediate layer, there is no sticky feeling between the skin and the clothes, and the body temperature does not drop due to water evaporation from the skin.

In Sample A (Comparative Example 1), the treatment of sweat caused by vigorous exercise was carried out smoothly and there was no sticky feeling between the skin and clothes, but it was very uncomfortable when wet in the rain.

Sample B '(Comparative Example 2) repelled rain on the side of the laminar layer and had a sufficient effect of preventing wind and rain, but the treatment of sweat caused by vigorous exercise was not smoothly carried out, and clothes were put on the skin. It was clinging and very uncomfortable, and my body temperature was extremely low.

Example 2 A double knit was prepared using 150 denier / 48 filament polyester processed yarn and 75 denier / 300 filament polyester drawn yarn, and then hydrophilic to 50% by weight of the polyester drawn yarn. After processing, the drawn yarn side was laminated with a darkly colored polyester type urethane in the same manner as in Example 1. The proportion of each layer was such that the surface layer was 20% by weight, the intermediate layer was 40% by weight, and the backside layer was 40% by weight.

The obtained fabric has a thickness of 8000 cc / m2.24.
It had a moisture permeability of hr and a water pressure resistance of 600 mm. When a water drop was dropped onto the surface of the polyester processed yarn side of this cloth, it was instantly absorbed and diffused to the side of the polyester drawn yarn, and the surface of the polyester processed yarn side did not feel wet at all.
Further, the laminate layer was colored in a dark color, which was a good appearance for clothing.

When this cloth was sewn as a windbreaker and a wear test was tried, there was no sticky feeling of sweat caused by intense exercise or work, and there was no decrease in body temperature.

[0026]

INDUSTRIAL APPLICABILITY The fabric of the present invention can be used as a sportswear for outdoor fields, particularly training clothing, sports clothing, etc.
When used as a tua material, sweat generated by intense exercise is diffused from the back layer (the side in contact with the skin) to the middle layer and radiated outside through the surface layer, so there is no sticky feeling between the skin and clothing. Also, the waterproof property of the surface layer can prevent rain and wind.

[Procedure amendment]

[Submission date] February 20, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Further, the intermediate layer needs to have the ability to absorb sweat quickly and retain the sweat, and therefore, it is necessary to include hydrophilic fibers as ultrafine yarns constituting the layer. The content of the hydrophilic fiber is 20 to 80% by weight with respect to the intermediate layer. If the content is less than 20% by weight, the ability to absorb and retain perspiration is insufficient, and if it exceeds 80% by weight, moisture such as perspiration continues to be retained in the intermediate layer and is not released from the surface layer to cause discomfort. Increase. In order for the intermediate layer to retain such ability, the water absorption rate is 15 seconds or less [ JISL1096:
Measurement by Method A (dropping method) ] is preferable.

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Claims (1)

[Claims] 1. A fabric comprising three layers, a surface layer, an intermediate layer and a back layer, wherein the surface layer is made of a moisture-permeable waterproof resin, and the intermediate layer has a single fiber fineness of 0.1 to 0.5. The denier is composed of ultrafine yarn containing 20 to 80% by weight of hydrophilic fiber, and the back surface layer is composed of hydrophobic fiber having a monofilament fineness of 1.0 to 5.0 denier. A breathable and waterproof fabric characterized by being.