JPH0128148B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an improved hygroscopic fabric that has a function of efficiently diffusing and excreting water droplets formed by sweating and condensation to the outside. Underwear made of water-absorbent fibers, such as cotton and cotton fabric, effectively absorbs water droplets from sweat when worn, but when the amount of sweat increases, the entire surface of the underwear becomes wet and becomes sticky. Not only does it cling to you and cause discomfort, but it also takes away your body heat when it dries.
It had the drawback of making you feel cold. In addition, in the case of two-way woven or knitted fabrics, such as sportswear where the front side is made of hydrophobic fibers and the back side is made of cotton, it feels refreshing when worn, but when the amount of sweat increases, the inside Because it lacks the ability to diffuse and excrete condensed sweat to the outside, sweat remains inside in a supersaturated state, which is unfavorable in terms of health and hygiene. In order to solve such problems, the present inventors conducted extensive and systematic research on the effects of products that utilize both hydrophilic and hydrophobic characteristics, and as a result, they were able to complete the present invention. Ivy. The first object of the present invention is to partially apply hydrophobic treatment to one side of a water-absorbent fabric to create an improved fabric that has an efficient diffusion and excretion function for water droplets such as sweat from the treated side to the untreated side. An object of the present invention is to provide a hygroscopic fabric. The hygroscopic fabric of the present invention uses a fluorine-based or silicone-based water repellent on one side of the water-absorbing fabric,
It is hydrophobically processed in a pattern, the pattern leaves the unprocessed part as a discontinuous hydrophilic part on the processed surface, and the short axis of each of the hydrophilic part and the hydrophobic part is 0.5 to 10 mm, Moreover, it is characterized in that the short axis of the hydrophilic part is the same as or larger than the short axis of the hydrophobic part. Fabrics that have water absorption properties include not only fabrics made of inherently water-absorbing fibers such as cotton, cotton wool, silk, linen, and wool, but also fabrics made of hydrophobic fibers such as polyamide, polyester, and polyacrylonitrile fibers. It also includes those that have been treated with water absorption, that is, have been given hydrophilic properties. The shape of the fabric may be any of woven fabric, knitted fabric, and nonwoven fabric, and may be a blended fabric, mixed knitted fabric, or mixed fabric. Hydrophobic finishing can be carried out in a pattern using a fluorine-based or silicone-based water repellent on the object to be treated, but it is important that the processing is carried out only on one side of the water-absorbing fabric. be. As a processing method,
For example, a screen printing method, a gravure coater method, a roller printing method, a foaming method, a spray method, a knife coater method, etc. can all be used. The pattern of the hydrophobic treatment is preferably a fine line pattern such as grid, cotton, or wavy, and the pattern must leave the untreated portion as a discontinuous hydrophilic portion, and the formed hydrophobic portion and The shorter diameter of both hydrophilic parts is 0.5 to 10 mm, preferably 1 to 5 mm.
mm. The area ratio of the hydrophobic portion to the hydrophilic portion is preferably 25:75 to 75:25, and the hydrophobic portion is preferably formed in a continuous pattern such as a lattice. It is preferable that the hydrophilic part has a discontinuous pattern with a size of 1 to 100 ^mm2 , especially 4 to 80 ^mm2 , and the short axis of the hydrophilic part is the same as or larger than the short axis of the hydrophobic part. good. In the present invention, since the hydrophilic parts exist with appropriate gaps between the hydrophobic parts, water droplets such as sweat adhering to the hydrophobic treated surface quickly flow to the untreated surface by capillary action, making the entire surface hydrophilic. It spreads to the remaining unprocessed surface. Therefore, the diffusion area of absorbed water is wide;
It evaporates easily, and even if excessive wetting occurs on the unprocessed surface, water droplets are less likely to flow back and wet the processed surface. By sewing the product of the present invention with the processed side facing inside, it is possible to obtain hygienic clothing that does not feel stuffy or sticky. Water droplets condensed from sweat are efficiently diffused and excreted to the outside,
It is most suitable for sports clothing, such as jogging wear, basketball, volleyball, tennis uniforms, baseball and other game uniforms, and can be used for a wide range of other purposes. The product of the present invention can be applied not only to clothing but also to a wide range of textile products such as bedding and bags that need to be protected from getting wet inside. In addition, although the product of the present invention has a hydrophobic portion obtained through hydrophobic processing, it is also possible to use hydrophobic fibers (or hydrophobically processed fibers) and hydrophilic fibers (or water-absorbing processed fibers).
Effects similar to those of the present invention can also be obtained by inter-knitting or inter-weaving into a desired shape. Next, examples of the present invention will be shown. Performance tests in Examples were performed in accordance with the following method. (1) Water diffusivity: A sample that had been left at constant temperature and humidity at 20℃ and 65% RH for 24 hours was placed with the hydrophobic surface facing up to cover the mouth of a 5cm diameter shear dish.
One drop of water (approximately 0.05 cc) was dropped from a pipette with the tip positioned above the surface, and after 5 seconds, the area of water (wetting) diffused onto the non-processed surface was measured. (2) Feeling of wetness A running shirt with the right body made from a fabric before hydrophobic treatment and the left body made from a fabric after hydrophobic treatment was used in a wear test by 20 panelists. 15 indoors while wearing a running shirt
After running for a minute, the number of participants indicates whether the fabric after hydrophobic treatment felt wetter than the fabric before hydrophobic treatment. (3) Wet slip resistance Five 5cm x 10cm test pieces were prepared for each thickness, and water was added to the test pieces to achieve a squeezing rate of 100%. Place the piece on the synthetic leather and place 5cm on top of it.
A 10 cm x 10 cm copper plate (265 g) was placed on it, and wet slip resistance was measured using an Instron at 20°C and 65% RH. (4) Cling Prepare 20cm square test pieces and place them on the inside of both legs and the front part of the slacks above the knees, with the test piece before hydrophobic treatment on the right and the test piece after hydrophobic treatment on the left with the treated surface skin-like. A wearing test was conducted by 20 panelists. After running for 15 minutes indoors, the number of participants was calculated to indicate whether they felt clinging to the test piece after hydrophobic treatment compared to the test piece before hydrophobic treatment. (5) Comfort to wear Wearing test similar to wet feeling in (2) shows whether comfort is good or bad by number of people. Example 1 Polyester knitted fabric (150d/48f stretch) was mixed with polyoxyethylene glycol (#400) - diglycidyl ether 2.5 parts by weight trimethylolpropane triglycidyl ether 2.5 parts by weight polyoxyethylene octylphenyl ether (HLB13.1) 2.5 Part by weight: Zn (BF ₄ ) ₂ 1.0 parts by weight Water: 98.5 parts by weight Soaked in a water absorption processing solution at room temperature,
Squeeze the liquid to 100%, dry at 100℃ for 5 minutes,
After dry heat treatment at 150°C for 5 minutes, washing at 40°C for 1 minute, dehydration, and drying in a hot air dryer at 40°C. A water repellent solution consisting of 5 parts by weight of perfluoroalkyl acrylate (18% dispersion) and 95 parts by weight of water was applied to the polyester knitted fabric treated to absorb water in this way, so that the hydrophilic part remained in a size of 9 ^mm2 . , applied with a gravure roller with a checkered pattern of different thickness, and after drying at 120℃ for 3 minutes,
Dry heat treatment was performed at 170°C for 3 minutes. The results of the product performance tests are shown in Table 1.

[Table] *Reference example From Table 1, by applying partial water-repellent treatment to one side of a water-absorbing fabric at a specific range of ratios, it is possible to diffuse sweat and condensation water droplets to the outside, making them comfortable to wear. You can see that you are getting a good product. Example 2 A polyester knitted fabric (150d/48f stretch) was treated for water absorption under the same conditions as in Example 1, and was further treated to be water repellent. However, the water-repellent finish was carried out by changing the size of the checkered pattern so that the ratio of hydrophobic parts to hydrophilic parts was 49:51. The results of the product performance tests are shown in Table 2.

【table】

[Table] * Reference example

From Table 2, if the area of the hydrophilic part, which is the remaining part of the hydrophobic treatment, is too small, it lacks the ability to absorb water, which is undesirable, and if the hydrophilic part is too large, it will cling and cause a feeling of wetness. I know it's not good. Example 3 Polyester fabric (PE150d/72f stretch)
was subjected to water absorption treatment under the same conditions as in Example 1, and was further subjected to water repellency treatment. However, in the shape of the checkered pattern, the area of the hydrophilic part is 9 mm ² and the area ratio of the hydrophobic part to the hydrophilic part is 25:75. The results of the product performance tests are shown in Table 3.

[Table] * Reference Example Example 4 Polyester fabric (PE150d/72f stretch)
After water absorption treatment in the same manner as in Example 1, from 99.9 g of dithyrol polysiloxane (15% perchlorethylene solution - manufactured by Shin-Etsu Chemical Co., Ltd.) and 0.1 g of organometallic salt catalyst (Cat-PC, manufactured by Shin-Etsu Chemical Co., Ltd.) A water repellent composition with a viscosity of 18,000 cps was applied using a screen with a grid pattern of 0.5 mm in length and width, with a hydrophilic part of 9 mm ² and an area ratio of hydrophobic part to hydrophilic part of 26.5:73.5. After drying at 150°C for 5 minutes, dry heat treatment was performed at 170°C for 5 minutes. 20℃, 65
Table 4 shows the performance test results after being left at constant temperature and humidity at %RH for 24 hours.

[Table] *Reference Example Example 5 Polyester knitted fabric (150d/48f stretch) was water-absorbed under the same conditions as in Example 1, and then perfluoroalkyl acrylate (20% water dispersion) 5 parts by weight Acetic acid 0.02 parts by weight Water A water-repellent solution consisting of 95 parts by weight was applied using a gravure coater with a checkered pattern of 5 mm in both thickness and thickness at a coating amount of 30 g/m ² , dried at 120°C for 3 minutes, and then subjected to dry heat treatment at 170°C for 5 minutes. . Table 5 shows the results of the product performance tests.

[Table] * Reference example

Claims (1)

[Scope of Claims] 1 One side of a water-absorbing fabric is hydrophobically treated in a pattern using a fluorine-based or silicone-based water repellent, and the pattern leaves unprocessed areas on the processed surface untreated. The hydrophilic part and the hydrophobic part are left as a continuous hydrophilic part, each having a minor axis of 0.5 to 10 mm.
Moreover, the short axis of the hydrophilic part is finished to be the same as or larger than the short axis of the hydrophobic part.It has a hygroscopic property that has the function of diffusing and excreting water droplets such as sweat from the processed surface to the unprocessed surface. fabric. 2. Claim 1, in which the water-absorbing fabric is a fabric made of hydrophobic fibers treated to absorb water.
Moisture-absorbing fabric as described in Section 1. 3 Area ratio of hydrophobic part and hydrophilic part is 25:75 ~
75:25, the hygroscopic fabric according to claim 1 or 2. 4. The hygroscopic fabric according to any one of claims 1 to 3, wherein the hydrophobic portion is formed in a continuous pattern. 5. The hygroscopic fabric according to any one of claims 1 to 4, wherein the hydrophilic portion has a discontinuous pattern with a size of 1 to 100 ^mm2 .