JPH1161649A - Polyamide-based moisture-permeable and waterproof woven fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject moisture-permeable and waterproof fabric, having a natural color unevenness, capable of improving a waxy feeling, excellent in a dry touch feeling and a dry and light touch feeling and useful as sportswear or the like by providing the surface of a woven fabric comprising a polyamide-based continuous filament yarn having thick and thin parts with a moisture-permeable and waterproof resin coating film. SOLUTION: This moisture-permeable and waterproof fabric is obtained by providing a moisture-permeable and waterproof resin film onto one surface of a woven fabric comprising a polyamide-based continuous filament yarn having 5-20% thickness unevenness in the longitudinal direction expressed in terms of Uster normal U%, >=0.22 g/d standard deviation of stress at 40% elongation point for 5 cm sample length and thick and thin parts and has >=0.2 kg/cm<2> water-resistant pressure and >=5,000 g/m<2> .24 hr moisture permeability. The crystallinity of the thick parts is preferably <35% and the difference between the thick and the thin parts in the crystallinity is preferably >=1%. The polyamide-based continuous filament yarn having the thick and the thin parts is preferably a raw silk having <=5% stretch elongation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the present invention, which has a dry feeling, a smooth feeling, a natural color spot, and is excellent in moisture permeability and waterproofness.
The present invention relates to a polyamide-based moisture-permeable waterproof fabric suitable for sports clothing and the like.

[0002]

2. Description of the Related Art Polyamide long fiber fabrics have been produced in large quantities for clothing, industrial use, and interior use due to their excellent fabric properties. However, these woven fabrics, especially woven fabrics obtained from nylon 6 and nylon 66 fibers, have a poor dryness like polyester fabrics and have a slimy feeling and a soft feeling.

[0003] For example, Japanese Patent Application Laid-Open No. 8-337974 discloses a moisture-permeation and waterproof property obtained by coating a synthetic fabric mainly composed of a polyurethane resin containing fine particles having a particle diameter 2 to 4 times that of a resin film on a fiber cloth. A fabric is described. Usually, although the resin surface has a dry feeling due to fine particles,
In the case of a woven fabric using a polyamide fiber, the sliminess of the surface is not improved.

Japanese Patent Application Laid-Open (JP-A) No. 63-213335 describes a polyamide filament yarn having a thick and light dyeing difference due to thick and thin, but has a habitous appearance in which the light and dark color difference is excessively emphasized. is there. On the other hand, JP-A-62-1915
No. 10 describes a multifilament yarn in which the emphasis of the light and shade color difference is improved by thickening and thinning. However, only a color unevenness in a yarn in which the thick and thin phases between filaments are irregular is improved, and a dry feeling is obtained. No mention was made of a feeling of smoothness or smoothness, and furthermore, the film lacked moisture permeability and waterproofness.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to improve the sliminess of the surface while maintaining the excellent characteristics of a polyamide-based long-fiber yarn woven fabric, to provide a dry feeling and a smooth feeling.
An object of the present invention is to provide a polyamide-based moisture-permeable waterproof fabric having natural color spots and excellent moisture-permeable waterproofness.

[0006]

One aspect of the present invention that achieves the above object is a woven fabric made of thick filament-based polyamide long fiber yarn, wherein a moisture-permeable waterproof resin film is coated on one surface of the woven fabric. It is characterized by having.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The polyamide-based moisture-permeable waterproof fabric according to the present invention is a woven fabric composed of polyamide-based long fiber yarns in which the fiber yarns constituting the woven fabric are thick and thin. When the fiber yarn has a thick portion and details, minute irregularities are generated on the surface of the woven fabric, and a dry feeling, a smooth feeling, and a natural color spot are obtained by the minute irregularities. At this time, in order to reduce the contrast of shading by dyeing and to express a more natural color spot, the thickness unevenness in the length direction of the polyamide long fiber yarn is 5 to 20% in Uster normal U%. Preferably,
More preferably, it is 6 to 15%.

The standard deviation of the stress at the 40% elongation point at 10 times of measurement of the polyamide long fiber yarn at a sample length of 5 cm is preferably 0.22 g / d or less, more preferably 0.17 g / d. It is as follows. The standard deviation of 0.22 g / d or less means that the period length of the thick part and the detail is substantially 5 cm or less.
The fact that it is 7 g / d or less means that the cycle length is even shorter,
Substantially 2.5 cm or less. By making the cycle length short and mixing the thick part and detail in any cross section of the multifilament, a natural color spot can be expressed.

It is preferable that the crystallinity of the thick portion of the polyamide long fiber yarn is less than 35%, and that the difference between the crystallinity of the thick portion and that of the fine portion is 1% or more. By setting the crystallinity of the thick part to less than 35%, the dyeing density can be increased, and more preferable color expression can be achieved. Then, by setting the difference between the crystallinity of the thick part and the detail to 1% or more, a dyeing difference is expressed, and a natural color spot can be expressed. Normally, in the case of a thick and thin yarn woven fabric having a difference in dyeing, a difference in shading of the woven fabric is likely to occur, but in the polyamide long fiber yarn of the present invention, a thick portion and details are mixed in any cross section of the multifilament. Therefore, the light and shade difference of a single fiber expresses a natural color spot.

[0010] Further, it is preferable that the thick polyamide filament fiber yarn is a raw yarn having an expansion / contraction rate of 5% or less. When a crimped multifilament having a high stretch ratio is used as the polyamide long fiber yarn in order to improve the slimy feeling, a sticky feeling is generated. Therefore, by using raw yarn having a stretch rate of 5% or less as the polyamide long fiber yarn, the slimy feeling is improved and a dry feeling and a smooth feeling are obtained.

Next, it is important that the polyamide-based moisture-permeable waterproof fabric of the present invention has a moisture-permeable waterproof resin film on one surface of a woven fabric composed of thick and thin polyamide-based filament yarn. The resin processing agent and processing method for imparting moisture permeability and waterproofness are not particularly limited.For example, a polyurethane solution obtained by dissolving a polyurethane compound in a water-soluble solvent is coated on the woven fabric, A method of producing this by wet gelation, a method of applying a polyurethane-based compound directly to a fabric, and performing drying and heat treatment, a method of producing a porous film of a polytetrafluoroethylene polymer, or a film of a polyurethane-based compound Then, there is a method of manufacturing by bonding the film to a fabric. Further, a knitted fabric having a low density is adhered to the surface of the polyamide-based moisture-permeable waterproof fabric obtained by these methods, which has a resin coating, to obtain a moisture-permeable waterproof fabric having a three-layer structure of fabric-resin coating-knitted fabric. There are methods.

The performance of the moisture-permeable waterproof fabric is as follows: water resistance is 0.2 kg / cm ² or more, and moisture permeability is 5000 g / m ^2.
It is preferably 24 hours or more. 0.2k water resistance
g / cm ² or more, it is possible to prevent internal penetration of rain when worn in light rain, and the moisture permeability is 5000 g.
/ M ² · 24 hours or more, sweat due to a little exercise is released as water vapor through the fabric and out of the clothes, and discomfort during wearing is reduced. More preferably, the water pressure resistance is 0.1.
5 kg / cm ² or more and moisture permeability of 6000 g / m ² · 24 hours or more.

[0013]

The measuring method and the calculating method of the evaluation value are as follows.

[Uster Normal U%] The thickness unevenness in the length direction of the multifilament was measured with a woster tester monitor C. The yarn speed was 8 m / min, the twist S1.5, the yarn tension was 1.5, the measurement time was 1 minute, and the measurement mode was normal, and the average deviation rate U% was measured. Arbitrary three points of the sample were measured, and the average value was expressed as Uster normal U%.

[Strong elongation / standard deviation of 40% elongation point stress]
Strong elongation was measured with an Instron tensile tester. Sample length 5
A stress-strain curve was obtained at a tensile speed of 5 cm / min in cm and the average value of 10 repeated measurements was expressed as strength and elongation.
Further, the stress at the 40% elongation point was calculated from the stress-strain curve obtained here, and the standard deviation of the stress in 10 repeated measurements was calculated.

[Crystallinity] The density was measured by a density gradient tube method and calculated from the following equation.

1 / d = Xc / dc + (1−Xc) / da where Xc: crystallization ratio ｛crystallinity: 100Xc
(%)｝ D: density of measurement sample (g / cm ³ ) dc: density of completely crystalline part (g / cm ³ ) da: density of completely amorphous part (g / cm ³ ) where nylon 6 Is dc = 1.230 g / cm
³ , da = 1.084 g / cm ³ is used.

[Hydraulic pressure resistance] According to JIS L-1092 high water resistance method.

[Moisture Permeability] JIS L-1099 (A-
According to 1).

[Stretching and stretching ratio] JIS L-1090 C
By law.

Example 1 A nylon 6 polymer having a sulfuric acid relative viscosity of 2.63 was melt-spun at a spinning temperature of 260 ° C. and a spinning speed of 800 m / min.
A multifilament undrawn yarn of 220 denier and 24 filaments was obtained. This undrawn yarn was double-drawn simultaneously and false-twisted with the drawing apparatus shown in FIG. 1 to obtain a multifilament thick yarn of 110 denier and 24 filaments. Table 1 shows the conditions of simultaneous false twisting and the quality of the obtained thick and thin yarn.

The obtained multifilament thick and thin yarn was used for warp and weft, glued without additional twisting, and woven with a water jet loom. The fabric structure at this time is 2 /
2 twill, woven fabric density 197 / 2.54cm
The weft density was set to 78 / 2.54 cm.

The obtained greige is set by a conventional method using a greige set,
It was refined, dyed with an acid dye using a jet dyeing machine, and dried.

After drying, a water repellent treatment was performed with a fluorine-based water repellent. That is, the above woven fabric was immersed in an aqueous dispersion containing 3% by weight of a water repellent Asahigard AG710 (manufactured by Meisei Chemical Co., Ltd.), picked up to a squeezing ratio of 40%, and subjected to a dry heat treatment at 130 ° C. for 30 seconds with a heat setter. Was done.

Further, a polyurethane solution containing the following components was coated at a rate of 150 g / m ² ,
The coating solution was immersed in a bath containing an aqueous solution containing 10% by weight of F (dimethylformamide) at 30 ° C. for 3 minutes to form a wet gel, and then washed with hot water at 80 ° C. for 10 minutes. After drying with hot air at ℃, heat treatment at 160 ℃ to obtain a polyamide-based moisture-permeable waterproof fabric.

Polyurethane Elastomer Chrispon 8166 25 parts by weight manufactured by Dainippon Ink and Chemicals, Inc. Fluorine water repellent Asahigard AG650 5 parts by weight manufactured by Meisei Chemical Co., Ltd. Crosslinking agent Burnock D500 1 part by weight manufactured by Dainippon Ink and Chemicals, Inc. Clay-organic composite Lucentite STN Corp Chemical Co., Ltd. 0.25 parts by weight DMF 100 parts by weight The obtained woven fabric has an improved slimy feeling, a dry feeling, a smooth feeling, a natural color spot, and 0.9 kg water resistance
/ Cm ² , and the moisture permeability was 8400 g / m ² · 24 hours, and the fabric was excellent in moisture permeability and waterproofness. In addition, the excellent woven fabric characteristics of the polyamide continuous fiber woven fabric were also maintained, and the color fastness was practical.

Example 2 Using the same greige machine as in Example 1, using the same treatment agent and method as in Example 1, greige set, refining, dyeing and drying were performed.

Next, using a gravure coater, an adhesive solution containing the following components and having a solid content concentration of 30% was applied to one surface of the woven fabric in a dot-like manner with an application area of 30%, and was manufactured by Nitto Denko Corporation. A porous film “Microtex” of a polytetrafluoroethylene polymer was bonded.

CRISVON NT-345 100 parts by weight (Polyurethane-based adhesive manufactured by Dainippon Ink and Chemicals, Inc.) BURNACK DN-950 5 parts by weight (Crosslinking agent manufactured by Dainippon Ink and Chemicals, Inc.) CRISVON Accel T 3 parts by weight ( Then, after drying at 80 ° C. for 2 minutes, heat treatment was performed at 130 ° C. to bond to obtain a polyamide-based moisture-permeable waterproof fabric.

The polytetrafluoroethylene polymer porous membrane has a thickness of 25 microns and a water pressure resistance of 4 kg / c.
m ² , and the water vapor permeability was 15740 g / m ² · 24 hours.

The obtained woven fabric has an improved slimy feeling, a dry feeling, a smooth feeling, a natural color spot, a water pressure resistance of 2.4 kg / cm ² , and a moisture permeability of 10130 g / m ² · 2.
The fabric was excellent in moisture permeability and waterproofing for 4 hours. In addition,
The excellent woven fabric characteristics of the polyamide long fiber woven fabric were also maintained, and the color fastness was practical.

Comparative Example 1 Using a nylon 6 polymer, a multifilament yarn of 110 denier and 24 filaments having no thickness unevenness and obtained by ordinary spinning direct drawing was used for warp and weft.
Weaving was performed in the same manner as in Example 1. The fabric structure at this time,
The fabric density was set in the same manner as in Example 1.

The obtained greige was set, refined, dyed, dried, water-repellent and water-permeable and water-repellent by the same treating agents and methods as in Example 1.

The obtained woven fabric has excellent woven fabric characteristics that are characteristic of polyamide long-fiber woven fabric, and has a water pressure resistance of 1%.
kg / cm ² , moisture permeability 8300 g / m ² · 24 hours,
Although the fabric was excellent in moisture permeability and waterproofness, it was poor in dryness and smoothness and had a slimy feel. Also,
It was a very uniform fabric without any natural color spots.

[0035]

[Table 1]

[0036]

The polyamide-based moisture-permeable and waterproof fabric of the present invention comprises:
A polyamide-based moisture-permeable waterproof fabric that has an improved sliminess while maintaining the excellent woven properties of polyamide-based long fibers, has a dry, smooth, natural color spot, and has excellent moisture-permeability and waterproofness. is there.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a drawing device for producing a thick and thin yarn.

[Explanation of symbols]

 1: undrawn yarn 2: supply roller 3: first delivery roller 4: fluid swirl nozzle 5: second delivery roller 6: third delivery roller 7: thick and thin yarn

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI A41D 31/00 501 A41D 31/00 501B 503 503F

Claims (5)

[Claims] 1. A polyamide-based moisture-permeable and waterproof fabric comprising a thick and thin polyamide-based long fiber thread, wherein said fabric has a moisture-permeable and waterproof resin coating on one surface. 2. The unevenness in the length direction of the long filament yarn having a thickness of 5 to 20 in Uster normal U%.
%, Wherein the standard deviation of the 40% elongation point stress at a sample length of 5 cm is 0.22 g / d or less. 3. The crystallinity of the thick portion of the polyamide long fiber yarn having a thickness of less than 35%, and the difference between the crystallinity of the thick portion and the detail of the detail portion is 1% or more. The polyamide-based moisture-permeable waterproof fabric according to claim 1 or 2. 4. The polyamide-based moisture-permeable and waterproof fabric according to claim 1, wherein the thick polyamide thin fiber yarn is a raw yarn having an expansion / contraction rate of 5% or less. 5. The polyamide-based moisture-permeable waterproof fabric according to claim 1, wherein the waterproof pressure is 0.2 kg / cm ² or more and the moisture permeability is 5000 g / m ² · 24 hours or more. .