JPH0358594B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a layered fiber sheet.

(Prior Art) Many woven or knitted fabrics have been proposed in the past that have excellent water retention and water absorption properties, and in which the surface that contacts the skin has a lower water retention rate than the other surface when retaining water.

For example, the water-absorbing fabric described in Japanese Patent Application Laid-Open No. 52-25168 is one of them. The common expected functions of these water-absorbing fabrics are to minimize the amount of sweat that remains on the fabric surface that comes into contact with the skin during sweating, and to transfer sweat to a fabric layer with a high water retention rate, so that sweat can be absorbed from the fabric surface. Sweating by evaporating sweat
The goal is to maintain the balance of transpiration.

By maintaining this balance between perspiration and transpiration, the temperature within the garment is kept below a certain level, providing a comfortable feeling when wearing the garment.

However, the sweating-transpiration mechanism described above sometimes has the problem of lowering the body temperature more than necessary due to the heat of vaporization caused by transpiration.

Particularly in the field of health sports, which has become popular in recent years, it is expected that exercise for the purpose of weight loss will result in sustained sweating. However, when the body temperature decreases as described above, it becomes impossible to continue sweating, and the purpose of exercise cannot be achieved.

(Object of the Invention) The object of the present invention is to improve such conventional drawbacks, to propose a fiber sheet having a layered structure that suppresses transpiration to a low level and does not reduce the feeling of wearing.

(Structure of the Invention) The present invention provides a fabric in which a hydrophobic layer made of hydrophobic fibers and a water-retaining layer made of hydrophilic fibers are formed, the surface of the water-permeable layer is covered with fluff, and the surface of the water-retaining layer is covered with fluff. This layered fiber sheet is characterized in that a resin layer is laminated on the water-permeable layer side.

The hydrophobic fibers used in the present invention include commonly used hydrophobic synthetic fibers, such as polyester, nylon, and acrylic fibers. A preferred example is the use of the trademark Teviron.

Next, the hydrophilic fibers used in the present invention may be either natural fibers or artificial fibers, or may be a combination or a mixture thereof. Specifically, natural fibers include cotton, wool, silk, linen, etc., and artificial fibers include rayon and synthetic fibers treated with hydrophilic and water-absorbing treatments. These synthetic fibers may be modified fibers such as blends of polyvinylpyrrolidone and nylon, or blends of polyalkylene glycol and polyester, and can be made by blending polyester with a micropore-forming agent and treating it with an alkali to create a large number of fine particles. It may be a material having pores (for example, trademark WELKY is a preferred example) or a microporous acrylic fiber.

The layered fiber sheet of the present invention uses a fabric comprising a water-permeable layer made of such hydrophobic fibers and a water-retaining layer made of hydrophilic fibers.

The fabric having a water-permeable layer and a water-retaining layer may be either a woven fabric or a knitted fabric and can be obtained by a known method.

That is, an example of a woven fabric is a woven fabric with a double weave structure, and an example of a knitted fabric is a double-sided knitted fabric, but in both cases, a water-permeable layer and a water-retaining layer may be formed on the front and back surfaces, respectively.

Furthermore, in the case of a knitted fabric, when the hydrophilic fibers and hydrophobic fibers are aligned and the knitted fabric is knitted, the hydrophilic fibers are mainly arranged on one surface and the hydrophobic fibers are arranged on the other surface. It may also be a method of knitting (i.e., reversible knitting). Considering the use of the layered fiber sheet of the present invention, it is preferable to use a knitted fabric.

The layered structure fiber sheet of the present invention will be explained with drawings.

FIG. 1 is a cross-sectional view schematically showing a cross section of a layered fiber sheet of the present invention, in which a fabric having a water-permeable layer 1 and a water-retaining layer 2 is used. 1' indicates fluff on the surface of the water-permeable layer, and 3 indicates the resin layer.

Note that the layer structure sheet of the present invention typically has a first
Although it has the layered structure shown in the figure, it is not limited to this example; for example, a third intermediate layer (fibrous layer) may be interposed between the water-permeable layer 1 and the water-retaining layer 2.

Next, it is important that the fluff 1' is present on the surface of the fabric having the water-permeable layer 1 and the water-retaining layer 2 on the water-permeable layer side. The fluff 1' may be a raised fluff or a raised fluff formed in an organized manner. It is preferable that the fluff 1' be long enough to almost cover the water-permeable layer 1 and formed densely. Furthermore, in the present invention, a resin layer 3 is laminated on the surface of the water-retaining layer 2 (that is, on the side of the water-retaining layer opposite to the water-permeable layer).

As the resin layer to be laminated, a laminated synthetic resin film or a synthetic resin coating can be effectively used. Examples of synthetic resin films include polyester, polyethylene, polyamide, polyurethane, etc., and particularly preferred examples are microporous polyurethane films that have been treated to be water repellent and coated with synthetic resin. A preferred example is one coated with polyurethane dope. still,
For coating with polyurethane dope, wet or dry methods can be used, and preferred examples include those that are used in combination with a water repellent (fluorine water repellent) and those that treat this resin layer to make it water repellent. Ru. Items that have been treated to be water repellent can have a higher water pressure resistance, so their uses can be expanded.

(Actions and Effects of the Invention) Since the layered fiber sheet according to the present invention has the above-described structure, the feeling of wearing it when sweating is extremely good compared to conventional cotton fiber clothing, and
The water-retaining layer contained a large amount of sweat, allowing continuous sweating during exercise. That is, sweat caused by perspiration is transferred to the water-retaining layer via the water-permeable layer, where water is retained.

At this time, the fluff on the surface of the water-permeable layer forms an air layer, which prevents "wetting" and retains heat, and prevents discomfort caused by "stickiness" when sweating. In particular, when the water-permeable layer and the fluff are made of polyvinyl chloride fibers, the water-permeable effect and the heat-retaining effect are extremely large.

Furthermore, the resin layer prevents sweat retained in the water retention layer from migrating to the outside, which prevents temperature drop due to heat of vaporization and prevents objects on the outside of this layered fiber sheet from getting wet. It also has For example, when wearing tights made using the sheet of the present invention and exercising in contact with the floor, the floor will not get wet, and it will not get wet when layered with other clothes. They are also suitable as tights for health sports (sauna tights).

Furthermore, since the layered fiber sheet of the present invention has such a function, it can be used as a water-impermeable sheet, and can be used as a type of bedding (sheets for elderly care).

Furthermore, since the layered fiber sheet of the present invention is non-water permeable (it is moisture permeable because the resin layer has micropores), it can also be used for other purposes, such as rain gear, gloves, etc.

Example 1 Single pile knitting machine XL-PLP gauge 20G
120De crimped yarn (Woolly yarn) made of pile-based polyvinyl chloride fiber (trademark - Teviron)
-48fil is knitted by feeding 1/52 of the water-absorbing acrylic (porous acrylic) spun yarn into the ground system. It is a knitted fabric with a plain knitted structure mainly made of water-absorbing acrylic spun yarn. In other words, it becomes a two-layer knitted fabric.

This knitted fabric is dyed and the polyvinyl chloride pile yarn on the front side is brushed.

A polyester film is then bonded to the plain knit structure of the water-absorbing acrylic spun yarn on the back side.

The knitted fabric thus obtained has a very soft and good texture, and even when moisture or sweat is added, the surface remains dry, and the moisture and sweat immediately move to the water-absorbing acrylic side. blocked by a film,
It does not go beyond the film to the other side.

Example 2 Using a single knitting machine XL-5M with a gauge of 22G, yarn feeding conditions were set so that polyester crimped yarn 150De-72fil was knitted on the front side and cotton combed yarn 60/2′S was knitted in contact with each other on the back side. do. Under these conditions, a two-layer knitted fabric structure is formed in which the crimped polyester yarn is mainly arranged on the front side of the knitted fabric, and the cotton combed yarn is mainly arranged on the back side. This knitted fabric is dyed and brushed. And polyurethane on the back side.
Apply coating.

This process produces a thick, brushed, soft knitted fabric with a three-layer structure.

The raised surface side of the obtained knitted fabric remains dry even if moisture or sweat is added to it, and the water and sweat are retained by the water-absorbing acrylic side that exists in the middle of the coating layer. There is almost no penetration beyond this point.

Furthermore, when the urethane-coated surface of the obtained three-layer knitted fabric is treated with a fluorine-based water repellent, the water repellency is increased, so the water retention property of the water absorbing acrylic layer is improved. has improved.

Example 3 Double-layered weft fabric consisting of one type of warp and two types of weft,
That is, a polyester spun yarn 16/-'S is used as the warp, and a double weave fabric is made in which the polyvinyl chloride spun yarn A is placed on the front side and the cotton yarn B is placed on the back side.

Next, the polyvinyl chloride spun yarn on the front side is brushed,
After that, it is dyed and a moisture-permeable microporous polyurethane film is glued to the back side (cotton thread side). According to the fabric thus obtained, water added to the front side moves to the middle layer made of cotton yarn and is retained therein.

However, it is stuck in the microporous film on the back side and does not come out. Also, the steam generated on the front side passes through the front side and the middle layer, and exits to the outside through the microporous portion of the film on the back side. In other words, when wearing this fabric, it is possible to eliminate the unpleasant feeling of stuffiness when the wearer is exposed to high humidity conditions (such as when performing strenuous exercise).

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view schematically showing a cross section of a layered fiber sheet of the present invention. 1... Water permeable layer, 1'... Fluff, 2... Water retaining layer, 3... Resin layer.

Claims (1)

[Claims] 1. A fabric in which a water-permeable layer made of hydrophobic fibers and a water-retaining layer made of hydrophilic fibers are formed, the surface of the water-permeable layer being covered with fluff, and an anti-water-permeable layer of the water-retaining layer. A layered fiber sheet characterized by having a resin layer laminated on the side. 2. The sheet according to claim 1, wherein the hydrophobic fibers are polyester fibers. 3. The sheet according to claim 1, wherein the hydrophobic fibers are polyvinyl chloride fibers. 4. The sheet according to any one of claims 1 to 3, wherein the resin layer is a synthetic resin film. 5. Any one of claims 1 to 3, in which the resin layer is coated with a synthetic resin.
Sheets listed in section.