JPH022981B2 - - Google Patents

Description

[Detailed description of the invention]

This invention relates to coated fabrics such as velvet and seal fibers. The purpose is to propose a coated fabric that has both high breathability and waterproofness by imparting special functions to the fluff and ground parts of the coated fabric. Conventional air permeability prevention fabrics include those that have a base fabric coated with a microporous membrane, or those that use ultra-high density fibers. All of these emphasize waterproof performance at the expense of breathability, and do not have breathability that is comfortable for practical use. On the other hand, medium- to high-density fibers have good breathability, but have low water pressure resistance and are inferior in function as waterproof fabrics. This invention was made in view of the above circumstances. To explain this coated fabric with reference to FIG. 1, the nap part 1 is made of hydrophobic fibers, which are inclined with respect to the base part 2 and aligned in approximately one direction, and the base part 2 is made of water-swellable fibers. Contains. This coated fabric has the fluff portion as its outer surface, and if it is used with the fluff aligned in approximately one direction oriented downward at least from the horizontal direction, the fluff portion 1 will absorb and reduce the impact of falling raindrops. It exhibits the effect of reducing water pressure, and at the same time causes raindrops to travel toward the tip of the fluff due to gravity, and its hydrophobicity creates a draining effect. In addition, the base 2 containing water-swellable fibers
absorbs rainwater that has passed through the fluff portion 1 on the surface and reached the ground surface, swells, and densifies the gaps between the fibers and the interwoven fibers, preventing further water intrusion and exhibiting waterproof properties. On the other hand, when the fabric is dry, there are voids between the fabrics, making it comfortable to wear as a breathable garment. The fibers that make up the fluff must be hydrophobic. Examples of such fibers include synthetic fibers such as polyester, polypropylene, polyacrylic, and polyamide, which are essentially hydrophobic in nature, and those treated with water-repellent treatments, and hydrophilic fibers such as cellulose fibers and wool. These include those that have been treated with a water-repellent finish to make them hydrophobic. The water repellency is preferably α=50 or more, more preferably β=90 or more. The base must contain fibers that absorb water and swell. The water-swellable fibers can be selected from cellulose fibers, modified cellulose fibers such as carboxymethyl cellulose and carboxyethyl cellulose, alkali-treated modified acrylic fibers, and low acetalized polyvinyl alcohol fibers, among others, modified cellulose Fibers are preferred. The ratio of water-swellable fiber to the base is
It is preferably 20% or more, more preferably 35% or more. The base portion preferably has a swelling degree (μ)≧20% to 80%, a water pressure resistance (X)≧150 mm, and a wet/dry water pressure resistance ratio (Y)≧1.1. Examples of this covered fabric having a fiber structure include brushed fabric, velvet, vettin, and seal, and examples of fabrics having a knitted structure include circular knit velor, circular knit napping, tricot cut napping, and knitted fabrics. The fabric may be made of warp-knitted velor or the like, or may be a flocked fabric with a non-woven fabric structure in which fluffs are flocked on the surface of a non-woven fabric. Its basis weight is approximately 100g/m ² to 1000g/m ² . Regardless of the structure, the fluff portion and base portion must have contradictory physical properties, and the fluff portion must be inclined with respect to the base portion and aligned in one direction. In other words, the hydrophobic fibers that make up the fluff part and the water-swellable fibers that make up the base part either have these properties themselves, or are fibers that have been given these properties after being made into threads or fabrics. in,
Any material that has these properties in the form of a coated fabric may be used. This will be explained below with reference to examples. Example 1 Using a 28-gauge sinker pile circular knitting machine, the pile yarn was polyester 75d/72 filament yarn dyed with water repellent treatment (using a fluorine-based water repellent), and the base yarn was a rayon/ester blend. A pile knitted fabric was knitted under the following knitting conditions using a woven yarn (rayon 50d/24 filament and polyester differential shrinkage blended yarn [trade name: JEUN SOYER], air-sprayed blended yarn of 50d/24 filament) (trade name: TASTEM). This pile knitted fabric was subjected to shearing, relaxing, and hair-sabaki treatments to obtain a coated fabric having a knitted structure in which the fluff portion 1 was inclined with respect to the base portion 2 and oriented substantially uniformly in one direction, as shown in FIG. Knitting processing conditions Raw material: Pile length 2.7 mm Density Warp 32 wales/inch Weft 70 courses/inch Weight 330 g/m ² Finishing conditions: Velor finish with pile cut rate of 22% (raw material weight loss rate after shearing) Finish fabric: Density Warp: 44 wales/inch Weft: 77 courses/inch Fabric weight: 370 g/m ² Comparative Example 1 A coated fabric with the same density and fabric weight as in Example 1 was produced under the same processing conditions as in Example 1, except for the following points. Differences from Example 1 Comparative Example 1-A: Ground yarn = Polyester false twisted processed yarn (1 heater) 100d/48 filament Comparative Example 1-B: Ground yarn = Same as (Comparative Example 1-A) Pile yarn = Polyester 75d/72 filament dyed yarn (no water repellent finish) The evaluation results of the above Examples and Comparative Examples are shown in Table 1.

【table】

[Table] As shown in the above table, Comparative Example 1-B (conventional product) was defective, and even Comparative Example 1-A (conventional improved product) did not have sufficient performance for practical use. However, as shown in the rain wear test, the coated fabric of the example was found to be a practically excellent fabric, with no water leakage and no stuffy feeling even when exercising in normal heavy rain. In addition, the evaluation test conditions were performed based on the following. Water repellency: JIS L-1092 Moisture permeability: JIS Z-0208 Dry water pressure resistance: JIS L-1092 Wet water pressure resistance: Water pressure resistance measured after being placed in saturated steam at 40°C for 30 minutes The method is JIS L- According to 1092. Wear test: The fabric was made into a hooded sweatshirt with the fluff direction facing downward, and the fabric was run lightly in the rain for 1 hour. Rainfall conditions: Light rain means a rainfall of 5 to 10 m/m/hour; heavy rain means a rainfall of 20 to 30 m/m/hour. Example 2 Warp: Rayon/ester blended yarn (product name Tastem) Yarn-dyed yarn (rayon 50d/24 filament and ester different shrinkage blended yarn [product name Jeuune Soyer] 30d/
(with 12 filaments) Reverse weft: Same as warp Surface weft: Same as warp, water-repellent treated (applied with fluorine water repellent) Texture: Weft double-sided weft satin fabric (5-ply satin weft) ) The surface weft of the above fabric is brushed and the warp density is 245/
As shown in Figure 3, the latitude density is 210 lines/inch.
A coated fabric having a woven structure according to the present invention in which the fluff portion 1 is inclined with respect to the base portion 2 and is oriented substantially uniformly in one direction was obtained. In Figure 3, 3 is the warp, 4 is the back weft, and 5 is the warp.
is the surface weft. Comparative Example 2 Warp: Ester phyllant yarn 80d/30 filament Back side weft: Same as the warp Surface weft: Same as the warp, water-repellent treated (using fluorine-based water repellent) Example using the above yarn The surface weft of a fabric having the same structure as that of Example 1 was raised to produce a raised fabric similar to that of the example. The evaluation results of the above Examples and Comparative Examples are shown in Table 2.

【table】

[Table] Example 3 Non-woven fabric made of Kyupra and ester blend (mixing ratio Kyupra 60%, ester 40%, single yarn denier 1d) (Basic weight
200g/m ² , 0.5mm thickness as base, and ester short fiber yarn (denier 1d, fiber length 3mm) on one surface.
The water-repellent treated material is then flocked to the non-woven fabric surface using the electrostatic flocking method at a fluff density of 65,000 strands/(inch) ² .
By brushing and soft calendering, a coated fabric according to the present invention having a nonwoven fabric structure in which the nap portion 1 shown in FIG. 4 is inclined with respect to the base portion 2 and oriented substantially uniformly in one direction was produced. Comparative example 3 Ester nonwoven fabric (100% ester single yarn denier
1d) as the base, and ester staple fibers on one surface (denier 1d, fiber length 3mm, no water repellent treatment)
A coated fabric was made with the same basis weight, thickness, and finish as in Example 3. The evaluation results of the Examples and Comparative Examples are shown in Table 3.

【table】 [Brief explanation of drawings]

Figure 1 is a cross-sectional view of a model showing the structure of the covered fabric of the present invention, and Figures 2, 3, and 4 are Example 1, respectively.
FIG. 2 is a cross-sectional view of a few knitted fabrics, woven structures, and nonwoven fabrics; 1...fuzz part, 2...ground part, 3...warp, 4...
...Back side weft, 5...Surface weft.

Claims (1)

[Claims] 1. A coated fabric characterized in that the fluff portion is made of hydrophobic fibers and is oriented in a substantially uniform direction at an angle with respect to the base portion, and the base portion contains water-swellable fibers.