JPS609974A - Hygroscopic fiber structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved hygroscopic fibrous structure having a function of efficiently diffusing and excreting water droplets condensed from perspiration 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 when it dries it takes away your body heat, making you feel cold. However, 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 cotton, the wearer feels refreshed when wearing it, but when a large amount of sweat is removed, Because it lacks the ability to diffuse and excrete condensed sweat from the inside to the outside, sweat remains inside in a supersaturated state,
It was not good for health and hygiene.

In order to solve this problem, 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 completed the present invention. Ta.

The first object of the present invention is to partially hydrophobically process one side of a water-absorbing fibrous structure to create an improved structure that has the ability to efficiently diffuse and excrete water droplets such as sweat from the treated side to the untreated side. An object of the present invention is to provide a hygroscopic fibrous structure.

The hygroscopic fibrous structure of the present invention is a fibrous structure in which one side of the water-absorbing fibrous structure is hydrophobically processed in a pattern, and the pattern leaves unprocessed portions as discontinuous hydrophilic portions on the processed surface. It is characterized in that the hydrophobic part and the hydrophilic part are finished so that the short axis of each is 1 to "LOwys."

Here, water-absorbing fiber structures include not only products that are inherently water-absorbing fibers such as cotton, cotton wool, silk, linen, and wool, but also products that are 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 product may be any of woven fabrics, knitted fabrics, and nonwoven fabrics, and may also be blended fabrics, interwoven fabrics, or interwoven fabrics.

Hydrophobic finishing can be done by applying a so-called waterproofing agent or water repellent agent to the object to be treated in a pattern using a conventional method, such as a screen printing method, a gravure coater method, a roller printing method, a foaming method, a spray method, or a knife coater. Any method can be used. In particular, it is preferable to use water repellents such as fluorine-based resins and silicone resins.

It is preferable that the pattern of the hydrophobic treatment is a fine line pattern such as a grid, a line, or a wavy pattern, and the pattern should leave the unprocessed portion as a discontinuous hydrophilic portion, and the formed hydrophobic portion and The shorter diameter of both hydrophilic parts is 0.5 to 1
0WjI, preferably 1 to 5M. The area ratio of hydrophobic part and hydrophilic part is 25
The ratio is preferably 5 to 75:25, and the hydrophobic portion is preferably formed in a continuous pattern such as a lattice.

The hydrophilic part preferably has a discontinuous pattern with a size of 1 to 100 - especially 4 to 80 -, and the short axis of the hydrophilic part is the same as or larger than the short axis of the hydrophobic part. It is better.

In the present invention, since the hydrophilic parts exist with appropriate gaps between the hydrophobic parts, water droplets such as sweat adhering to the hydrophobically treated surface quickly flow to the untreated surface by capillary action, making the entire surface hydrophilic. Spreads to remaining unprocessed surface. Therefore, the diffusion area of the absorbed water is wide and evaporates easily, and even if excessive wetting occurs on the non-processed surface, water droplets are less likely to flow back and wet the processed surface. By sewing the fiber structure 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, making it ideal for sports clothing, such as jogging wear, basketball shoes, etc.
.

It is also suitable for underwear for volleyball, tennis uniforms, baseball uniforms, and other game uniforms, and can be used in other stores. The fiber structure 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 prevented from getting wet inside.

In addition, although the fiber structure of the present invention has a hydrophobic portion obtained by hydrophobic processing, hydrophobic fibers (or hydrophobic processed fibers)
Effects similar to those of the present invention can also be obtained by inter-knitting or inter-weaving hydrophilic fibers (or water-absorbing treated fibers) 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 has been left at constant temperature and humidity at 20°C and 165% RH for 24 hours is placed with the hydrophobic surface facing up to cover the opening of a 5α diameter petri dish, and placed 3cm above the sample. One drop of water (approximately ○, Q5 cc) was dropped from a pipette with the tip positioned at the tip, and after 5 seconds, the area of water (wetting) diffused onto the non-processed surface was measured.

(2) Feeling of wetness Using a running shirt with the right body made from fabric before hydrophobic treatment and the left body made from fabric after hydrophobic treatment, Panera
A wearing test was conducted by 20 people. After wearing a running shirt and running indoors for 15 minutes, the number of participants was measured to determine whether the fabric after hydrophobic treatment felt wetter than the fabric before hydrophobic treatment.

(3) Prepare 5 test pieces with a wet slip resistance of 5 cIn Place it on synthetic leather and place a 5cm x 1○α copper plate (265
9) and set the wet slip resistance to 200C using Instron.
Measured at 65% RH.

4) Prepare test pieces with a clinging strength of 20° and place them on both legs of slacks, on the inside of the front body above the knees, with the test piece before hydrophobic processing on the right and the test piece after hydrophobic processing on the left, with the processed surface exposed to the skin. A wearing test was conducted by 20 panelists.

After running indoors for 15 minutes, the number of participants was expressed as whether or not they felt clinging to the test piece after hydrophobic treatment compared to the test piece before hydrophobic treatment.

(5) Comfortable to wear based on the same wear test as wet feeling in (2),
Indicates the number of defects.

Example 1 A polyester knitted fabric (150d/48f stretch) was mixed with 2.5 parts by weight of polyoxyethylene glycol (#400) diglycidyl ether 2.5 parts by weight of trimethylolpropane triglycidyl ether polyoxyethylene octylphenyl ether (HL B 13.'l) 2.5 parts by weight Z
n(BP,)2' x, o parts by weight Immerse in a water absorption processing solution consisting of 98.5 parts by weight of water at room temperature, and reduce the reduction rate to l○○%.
Squeeze the liquid and dry at 10o0C for 5 minutes, 150
After dry heat treatment at °C for 5 minutes, wash at 4o0C for 1 minute,
After dehydration, it was dried in a hot air dryer at 40°C.

5 parts by weight (18%
Dispersion) A water repellent solution consisting of 95 parts by weight of water was applied using a gravure roller with a checkered pattern of different thickness so that the hydrophilic portion remained with a size of 9, and after drying at 120'C for 3 minutes, 170°C3
Dry heat treatment was performed for minutes.

The results of the product performance tests are shown in Table 1.

From Table 1, by applying a partial water repellent treatment to one side of a water-absorbing fabric at a specific range of ratios, a comfortable fiber structure can be obtained that has the function of diffusing sweat and condensed water droplets to the outside. I know that it will happen.

Example 2 A polyester knitted fabric (150d/48f stretch) was treated with water absorption under the same conditions as in Example 1, and was further treated with water repellency.

However, the water repellent finish has a 49:5 ratio of hydrophobic and hydrophilic parts.
The test was carried out by changing the size of the checkered pattern so that the result was 1. The results of the product performance tests are shown in Table 2.

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,
It turns out that the wet feeling becomes dog-like, which is not desirable.

Example 3 Polyester fabric (PE15od/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 checkered pattern, the area of the hydrophilic part is 9d, and the area ratio of the hydrophobic part to the hydrophilic part is 25 near 5.
This is the result.

The results of the product performance tests are shown in Table 3.

t Polyester fabric (PE150d/72f stretch)
After water absorption treatment in the same manner as in Example 1, 99.9 g of dimethylol polysiloxane (15% perchlorethylene solution - manufactured by Shin-Etsu Chemical Co., Ltd.) and an organic metal salt catalyst (Cat-P
C1 (manufactured by Shin-Etsu Chemical Co., Ltd.) 0.19 Water-repellent composition needle with a viscosity of 18,000 cps, checkered pattern of 0.5 twm in both warp and weft, hydrophilic portion 9Ii
, area ratio of hydrophobic part to hydrophilic part 26.5 Near 3
．． A pattern of 5 is applied using a screen and heated to 150°C.
After drying for 5 minutes, dry heat treatment was performed at 170'C for 5 minutes. 2
The performance test results after being left at constant temperature and humidity at 0°C and 165% RH for 24 hours are shown in Table 4. Example 5 Polyester knitted fabric (1!50d/48f stretch)
After water absorption processing was carried out under the same conditions as in Example 1, a water repellent solution consisting of 5 parts by weight of perfluoroalkyl acrylate (20% aqueous dispersion), 0.02 parts by weight of acetic acid, 95 parts by weight of water was applied for 5 minutes in both directions. Using a gravure coater with a checkered pattern, the coating amount is 30! i/rr? After drying for 120,003 minutes, dry heat treatment was performed for 5 minutes at 170'c. Table 5 shows the results of the product performance tests.

Claims (7)

[Claims] (1) A fibrous structure in which one side of a water-absorbing fibrous structure is hydrophobically processed in a pattern, and the pattern leaves the unprocessed part as a discontinuous hydrophilic part on the processed surface, and is hydrophobic. The short axis of the hydrophilic part and the hydrophilic part is 0.5 to 1.
A hygroscopic fiber structure characterized in that it is finished so as to have a 0.0111ff. (2) The hygroscopic fibrous structure according to claim 1, wherein the hygroscopic fibrous structure is obtained by subjecting a hydrophobic fibrous structure to water absorption processing. (3) Area ratio of hydrophobic part to hydrophilic part is 25 near 5~
The hygroscopic fiber structure according to claim 1 or 2, wherein the ratio is 75:25. (4) The hygroscopic fiber structure according to any one of claims 1 to 3, wherein the hydrophobic portion is formed in a continuous pattern. (5) The hygroscopic fiber structure according to any one of claims 1 to 4, wherein the hydrophilic portion has a discontinuous pattern with a size of 1 to 100 mA. (6) The hygroscopic fibrous structure according to any one of claims 1 to 5, wherein the hydrophobic treatment is performed using a water repellent. (7) The hygroscopic fiber structure according to any one of claims 1 to 6, wherein the short axis of the hydrophilic part is equal to or longer than the short axis of the hydrophobic part.