KR100614624B1 - A denim like breathable and water proof fabric - Google Patents

Abstract

The present invention relates to a denim-like moisture-permeable waterproof fabric, wherein one of the warp and weft yarn is composed of airtexturing (airtexturing) yarn in which the polyamide multifilament and the polyester multifilament is air-entangled, and the other of the warp and weft yarn is It is composed of polyamide multifilament or their air-texturing processing yarns, characterized in that the polyurethane film layer having micropores on the fabric is coated. The present invention expresses the same feel and appearance as the spun yarn fabric, and also has excellent moisture permeability.

Moisture-Proof Waterproof, Fabric, Denim, Air-Texuring, Processed Yarn, Feel, Exterior

Description

A denim like breathable and water proof fabric}             

1 is a process schematic diagram of manufacturing the air-texturing processing yarn of the warp or weft of the present invention moisture-permeable waterproof fabric

Figure 2 is an electron micrograph of the inclined or weft air-texuring processing of the present invention breathable waterproof fabric

Figure 3 is an electron micrograph showing the cross-sectional state of the present invention breathable waterproof fabric

※ Explanation of Codes on Major Parts of Drawings

1,2,5,7: Supply roller 3: Air jam nozzle

4: Moisture supply device 6: Hollow heater 8: Winding roller

A: Super yarn (polyamide multifilament or polyester multifilament)

B: screening (polyamide multifilament or polyester multifilament)

The present invention relates to a moisture-permeable waterproof fabric (hereinafter referred to as "denim-based moisture-permeable waterproof fabric"), which is made of synthetic fiber fabric but has a soft touch and appearance, such as a fabric woven with yarn.

Since the development of synthetic fibers for the first time, efforts have been made to imitate natural fiber advantages while maintaining the advantages of synthetic fibers. Up to now, synthetic fibers have been developed a lot, and through various processing methods, natural fibers have become very close to the appearance and touch, and some parts have overwhelmed natural fibers.

In recent years, effects such as denim, melange, or linen look, which are compounded by the unique material properties of natural fibers, have emerged as a trend in the trend of trendy materials. Such effects need to be realized in synthetic fibers including functionality.

Among them, denim is used cotton material, and the slope is made of indigo dye, which is dyed with navy blue yarn, and weft is used with undyed yarn that is not dyed. It is defined as weaving a twill or a transformative weave. Such cotton denim is gradually dyed or partially desalted by weft yarns by washing or repeated washing to express natural tones and has a soft touch unique to the yarn.

However, most cotton denim has to go through the slope printing process, and the cotton yarn of Sesido is very expensive and the process is complicated in many stages, so most denim fabrics are thick.

Therefore, in the case of coating the polyurethane resin on the surface in order to provide a weight higher than that of the synthetic fiber and moisture permeability, there is a disadvantage in that the characteristics of the cotton fiber are not deteriorated or the waterproof is made properly, and the coating process is required to go through several steps. Therefore, it is difficult to apply to products that require light weight and functionality, such as jackets and sportswear, there is a limit of use.

In order to solve these problems, a denim look fabric made of synthetic fibers has recently been developed and widely used in jeans, bags and simple accessories.

Denim-like fabric refers to a fabric in which a tone of white dots is expressed on the surface of the fabric by showing a color more inclined than the weft yarn.

In the prior art of manufacturing denim-like fabrics from synthetic fibers, there is a method of using undyed yarns that do not dye and weft yarns in the same way as cotton denim. In this case, there are problems such as disproportionation of salts, cumbersome processes, and high price of the salts process, so they are not frequently used.

As another method, there is a method of printing a denim pattern on a fabric as in Korean Patent Publication No. 1995-110. Part of the denim fabric is engraved on the printing roller or screen to express the denim effect by the printing method, but the process is simple, but the touch is not the same as cotton spinning yarn, the fastness is poor, and the roller or screen is changed every time the pattern is changed. There was an inconvenience to change.

As another method, there is a method of using a island-in-the-sea microfiber yarn as described in Korean Patent Laid-Open Publication No. 2002-2492 to reduce the weight after weaving to cause the whitening of the fabric block part by friction, thereby producing a natural fiber denim fabric. In this method, the island-in-the-sea microfiber is used to show the same feel as natural fiber, but rather, it is close to suede and has to go through weight loss process and friction processing. . In addition, the island has a complex disadvantage, such as the high price of island-in-the-sea microfiber and the need to adjust the appropriate weight loss conditions.

The purpose of the present invention is to solve the problems of the prior art, various and natural denim effect is expressed, the synthetic fiber filament is not unique gloss, excellent bulky and has the same feel and appearance as the fabric of cotton yarn It is to provide a denim-like breathable waterproof fabric.

The present invention is to provide a denim-like moisture-permeable waterproof fabric that can express a denim-like effect even if the dyeing process does not go through a simple manufacturing process. In addition, the present invention can eliminate the gloss peculiar to the synthetic fiber filament despite the use of a fabric woven from synthetic fiber filaments, to provide a denim-like moisture-permeable waterproof fabric having a soft touch and warmth, such as yarn. To this end, the present invention is intended to improve the bulkiness and feel of the fabric by using the air-texturing processing yarn in which the polyamide multifilament and / or polyester multifilament is air-interlaced yarn as a warp or weft.

One of the warp and weft of the denim-like moisture-permeable waterproof fabric of the present invention for achieving the above problems is composed of an airtexturing processing yarn in which polyamide multifilament and polyester multifilament are air-interlaced, and warp and weft The other one is composed of polyamide multifilament or their air-texturing processing yarns, characterized in that the polyurethane film layer having micropores on the fabric is coated.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

Denim-based moisture-permeable waterproof fabric of the present invention is composed of (i) a fabric woven of synthetic fiber filaments, (ii) a polyurethane film layer formed (coated) on the fabric having a micropores.

More specifically, the synthetic fiber fabric is one of the warp and weft yarn is an airtexturing (airtexturing) processing yarn of the polyamide multifilament and polyester multifilament, the other of the warp and weft yarn is polyamide multifilament or Consists of air texuring machined yarn.

1 is a process schematic diagram of manufacturing the air texturing processing yarn. Referring to the method of manufacturing the air-textured processing yarn through Figure 1, while supplying the polyamide multifilament or polyester multifilament to the air entanglement nozzle (3) in the super yarn (A) at the same time the polyamide multifilament or polyester multifilament It is supplied by the screening (B) to the air entanglement nozzle (3), these are air entangled, and then manufactured by heat treatment and winding in the hollow heater (6).                     

At this time, it is preferable for the loop stability of the processed yarn to pass moisture through the water supply device 4 and supply the moisture to the screening before supplying the screening B to the air entanglement nozzle 3.

By adjusting the difference in linear velocity between the supply rollers (1 and 5 or 2 and 5), the overfeed rate of the firing (A) and screening (B) is controlled. It is preferable to adjust the overfeed rate / supervision rate of the superfine yarn to 1.2 to 3.5, and to adjust the air pressure to 8-15 kg / cm 2 during the air entanglement. In addition, it is preferable to adjust the weight ratio of the polyamide multifilament to the polyester multifilament to 0.15 to 6 at the time of manufacturing the air-texturing processing yarn.

It is preferable that the fineness of an airtexing processed yarn is 100-400 denier.

The air-texturing processing yarn manufactured as described above has a structure in which the superfiber (A) is wound around the screening (B), and a plurality of loops on the surface thereof, as shown in FIG. 200 pieces / mm are formed. It is preferable that 95% or more of the loops formed on the surface of the air texturing yarn have a length of 0.3 to 2.5 mm.

The content in the fabric of the air-texuring processing yarn is more than 30% by weight is preferable for improving the feel and bulkiness. When the content is less than 30% by weight, the effect of the denim tank may be lowered and the touch and bulkiness may worsen.

Denim-based moisture-permeable waterproof fabric of the present invention is manufactured through the following processes.

First, the fabric is fabricated by using an air-texturing machined yarn in which polyamide multifilament and polyester multifilament are air-entangled as one of warp and weft layers, and polyamide multifilament or its airtexturing yarn as the other warp or weft yarn. After weaving, it is dyed with an acid dye to dye the polyamide multifilament in the fabric and not to dye the polyester multifilament in the fabric so that the denim effect is expressed.

Next, by wet coating a polyurethane resin on a dyed fabric in a conventional manner to form a film layer having micropores on the fabric to produce a denim-proof moisture-proof waterproof fabric of the present invention. At this time, the coating amount is 100 ~ 400g / ㎡, the film layer thickness is preferably 5 to 50㎛.

Denim-like moisture-permeable fabric of the present invention manufactured by the method as described above is due to the natural denim-like effect, such as cotton spinning yarn and yarn spun yarn due to the dyeing difference of polyamide-based multi-filament and polyester-based multifilament in the air The same touch and appearance can be expressed. Various colors and denim tanks can be expressed depending on the dyeing characteristics and supply of the yarn.

In addition, because of the difference in dyeing characteristics, it is easier to process the denim tank without using the dyeing process than when using the same type of multifilament, and the process is simple.When airtexing processing, the different types of multifilaments are evenly dispersed and entangled. It can have a much more natural effect on the fabric.

In addition, it is possible to eliminate the gloss peculiar to synthetic fiber filament by the insulation of the bulky yarn and the loop protruding from the fabric surface, and has a soft touch like the spun yarn. In addition, the dye is not contaminated with the polyurethane coating layer due to the dyeing of the polyamide-based dye with acid dyes.

Polyurethane coating layer is formed close to the fabric side to form micro pores with diameter of 1 ~ 5㎛ improves the waterproofing performance to prevent the ingress of water from the outside, and continuity of the polyurethane film is inhibited by the micro pores The heat flow by is reduced.

In addition, the relatively large pores having a diameter of 10 to 100 μm can provide excellent moisture permeability because they are free passages of water vapor molecules, and in a low temperature environment, heat loss due to convection is prevented by a non-flowable air layer enclosed in the pores. Can be.

Due to the polyurethane elastic film, volume, soft touch, etc. are expressed, and it possesses waterproof function and moisture permeability, thereby preventing rain and wind penetration and reducing the loss of body temperature. It will serve to discharge properly.

Various physical properties of the denim-based moisture-permeable waterproof fabric in the present invention are evaluated by the following method.

· Appearance / feel / denim effect

The evaluation was performed by a sensory test by 10 experts. One person evaluated the 5-point system, and the average score was 4 points or more, and the average score was 3 points or more and less than 4 points, and the average point was less than 3 points.

Water pressure

Measured by the ISO 811 method.

Moisture permeability

Measured by ASTM E 96 (B method, Inverted cap) method.                     

Water vapor permeability

It was classified as excellent when the water pressure measured by the above method satisfies both the range of 1,000 to 10,000 mmH ₂ O and the moisture permeability of 3,000 to 10,000 g / m 2 · 24 hours.

Loop length and number

It is measured with a Fray counter model DT-104 manufactured by Toray Industries, Japan.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

Nylon 6 70 denier / 48 filaments were respectively used for weaving and screening, and these were fed to the air nozzles at an overfeed rate of 12% and 20%, respectively, and then they were air entangled with an air pressure of 10 kgf / cm 2 and then in a hollow heater. Heat setting at 180 ℃ to prepare a gradient air texturing processing yarn. In addition, the inclined air texuring processing yarn and polyester 75 denier / 72 filament screening to supply to the air processing nozzle with a 16% overfeed rate, while the nylon 6 70 denier / 48 filament two-ply air processing nozzle After supplying to the overfeed rate of 34%, these were air-interlocked with an air pressure of 10kg / ㎠, and heat-set at 190 ℃ in a hollow heater to prepare a wefted air texturing processing yarn. Weaving twill fabrics in the usual way, using the warp and air weaving yarns for warp yarns and weft yarns for warp and weft yarns, respectively, and dyeing them with acid dyes (dye only nylon 6 filaments). To produce a dyed fabric. Next, after the wet coating of the coating liquid of the polyurethane resin to the thickness of 25㎛ using a knife coater on the dyeing fabric, it is solidified in water (solvent extraction) to prepare a denim-proof moisture-permeable fabric. The results of evaluating the physical properties of the inclined air-texturing processing yarn and the above-mentioned air-texturing processing yarn are as shown in Table 1, and the results of evaluating the properties of the denim-based moisture-permeable waterproof fabric are shown in Table 2.

Example 2

Nylon 6 70 denier / 48 filaments were respectively used for weaving and screening, and these were fed to the air nozzles at an overfeed rate of 12% and 20%, respectively, and then they were air entangled with an air pressure of 10 kgf / cm 2 and then in a hollow heater. Heat setting at 180 ℃ to prepare a gradient air texturing processing yarn. In addition, nylon 6 70 denier / 48 filament and polyester 75 denier / 72 filament are screened and supplied to the air processing nozzle with a 15% overfeed rate. Supplied at 32% overfeed rate, these were air-interlaced at an air pressure of 10 kg / cm 2, and then thermally set at 190 ° C. in a hollow heater to prepare a wefted air texturing processing yarn. Weaving twill fabrics in the usual way using warp and weft yarns for warp and weft yarns manufactured as described above, respectively, and dyeing them with acid dyes (dye only nylon 6 filaments). To produce a dyed fabric. Next, after the wet coating of the coating liquid of the polyurethane resin on the dyeing fabric to a thickness of 15㎛ using a knife coater, it is solidified in water (solvent extraction) to prepare a water-proof waterproof fabric denim. The results of evaluating the physical properties of the inclined air-texturing processing yarn and the above-mentioned air-texturing processing yarn are as shown in Table 1, and the results of evaluating the properties of the denim-based moisture-permeable waterproof fabric are shown in Table 2.

Example 3

Nylon 6 70 denier / 48 filaments were respectively used for weaving and screening, and these were fed to the air nozzles at an overfeed rate of 12% and 20%, respectively, and then they were air entangled with an air pressure of 10 kgf / cm 2 and then in a hollow heater. Heat setting at 180 ℃ to prepare a gradient air texturing processing yarn. In addition, the polyester 75 denier / 72 filament three-ply described above is supplied to the air processing nozzle at a 14% overfeed rate, and the nylon 6 70 denier / 48 filament is superfinished with 37% overfeed to the air processing nozzle. After supplying at a rate, these were air-interlaced at an air pressure of 10 kg / cm 2, and then thermally set at 190 ° C. in a hollow heater to prepare a wefted air texturing processing yarn. Weaving twill fabrics in the usual way using warp and weft yarns for warp and weft yarns manufactured as described above, respectively, and dyeing them with acid dyes (dye only nylon 6 filaments). To produce a dyed fabric. Next, the wet coating of the coating liquid of the polyurethane resin on the dyeing fabric to a thickness of 20㎛ using a knife coater, and then solidified in water (solvent extraction) to prepare a water-proof waterproof fabric denim. The results of evaluating the physical properties of the inclined air-texturing processing yarn and the above-mentioned air-texturing processing yarn are as shown in Table 1, and the results of evaluating the properties of the denim-based moisture-permeable waterproof fabric are shown in Table 2.                     

Example 4

Nylon 6 70 denier / 48 filament and polyester 75 denier / 72 filament are screened and supplied to the air processing nozzle at 15% overfeed rate. By supplying at an overfeed rate of%, these were air entangled with an air pressure of 10 kg / ㎠, and then thermally set to 190 ℃ in a hollow heater to prepare a weaving air texturing processing yarn. Using nylon 6 70 denier / 48 filament as a warp, weaving twill fabric in the usual way, using the above-mentioned weaving air-texturing processing yarn as the weft, and then dyeing it with acid dye (nylon 6 filament only Dyeing fabric). Next, the coating solution of the polyurethane resin on the dyeing fabric using a knife coater wet coating to a thickness of 30㎛, and then solidified in water (solvent extraction) to prepare a water-proof waterproof fabric denim. The results of evaluating the physical properties of the inclined air-texturing processing yarn and the above-mentioned air-texturing processing yarn are as shown in Table 1, and the results of evaluating the properties of the denim-based moisture-permeable waterproof fabric are shown in Table 2.

Comparative Example 1

After weaving nylon 6 70 denier / 48 filament with a disperse dye through a conventional dyeing process, it is used as a warp, and weaving by conventional method using a non-dyed nylon 6 70 denier / 48 filament with a weft A denim-like fabric is produced by printing in a conventional manner using a screen having a stamped pattern. Next, after the wet coating of the coating liquid of the polyurethane resin on the dyeing fabric to a thickness of 5㎛ using a knife coater, and solidified in water (solvent extraction) to prepare a water-proof waterproof fabric denim. The results of evaluating the properties of the denim-like moisture-permeable waterproof fabric are shown in Table 2.

Comparative Example 2

Ramps Nylon 6 70 denier / 48 filaments are used as warp yarns, polyester 75 denier / 72 filaments are used as weft yarns, and the twill denim fabric is woven in the usual way, and then dyed with acid dyes to make denim fabric. Manufacture. Next, after the wet coating of the coating liquid of the polyurethane resin on the dyeing fabric to a thickness of 55㎛ using a knife coater, and solidified in water (solvent extraction) to prepare a water-proof waterproof fabric denim. The results of evaluating the properties of the denim-like moisture-permeable waterproof fabric are shown in Table 2.

Air-Texuring Machine Properties  Yarn Properties Slope Use of stomach Number of loops between 0.5 and 2.5 mm Number of loops exceeding 2.5 mm Nylon 6 / Polyester Weight Ratio Number of loops between 0.5 and 2.5 mm Number of loops exceeding 2.5 mm Example 1 54 0 1.8 125 One Example 2 54 0 2.8 113 0 Example 3 54 0 0.3 102 One Example 4 0 0 2.8 113 0

Denim-like breathable waterproof fabric properties division Exterior touch Denim-like Breathable Water pressure (mmH ₂ O) Moisture permeability (g / ㎡, 24 hours) evaluation Example 1 Great Great Good 4,000 5,000 Great Example 2 Great Great Great 3,000 7,000 Great Example 3 Great Good Great 3,200 6,000 Great Example 4 Good Good Great 4,500 5,000 Great Comparative Example 1 Bad Bad Good 1,200 12,000 Bad Comparative Example 2 Bad Bad Bad 5,500 2,500 Bad

As can be seen from the evaluation results, the fabric of the denim fabric according to Examples 1 to 4 has excellent appearance and a natural denim fabric, and a soft texture is expressed such as cotton spun yarn, but the softness is excellent, but the denim according to Comparative Examples 1 and 2 The fabric is similar to denim but has no natural side and feels soft like a yarn. In addition, when both the warp and weft yarns were used by air-texturing yarns, they were found to be much softer and have the same texture as cotton yarns. In addition, it can be seen that sufficient moisture-permeable waterproofness is not expressed when the thickness of the moisture-permeable waterproof coating is more than or less than the reference range.

The present invention can express the denim effect even without the dyeing process, so the manufacturing process is simple. In addition, a microporous polyurethane film layer is coated on a fabric woven with synthetic fiber multifilament, so that the thickness is thin, the film layer is not contaminated with dyes, and the moisture permeability is excellent. do. As a result, the present invention is useful for products requiring both light weight and functionality at the same time, such as jackets and sportswear.

Claims (8)

One of the warp and weft yarns consists of an airtexturing machine with polyamide multifilament and polyester multifilaments interwoven with air, and the other of the warp and weft yarns is a polyamide multifilament or their airtexturing yarn. Density-proof moisture-permeable fabric, characterized in that the polyurethane film layer having a fine pores on the fabric is coated. According to claim 1, Denim-like moisture-permeable fabric, characterized in that the content of the air-texuring processing yarn in the fabric is more than 30% by weight. The denim-like moisture-permeable waterproof fabric according to claim 1, wherein the fineness of the air-texturing yarn is 100 to 400 denier. The denim-based moisture-permeable waterproof fabric according to claim 1, wherein the weight ratio of the polyamide multifilament to the polyester multifilament constituting the air-texturing yarn is 0.15 to 6. The denim-based moisture-permeable fabric according to claim 1, wherein 5 to 200 loops / m having a length of 0.3 mm or more are formed on the surface of the air-texturing yarn. The denim-based moisture-permeable fabric according to claim 5, wherein at least 95% of the loops formed on the surface of the air-texturing yarn have a length of 0.3-2.5 mm. The water vapor-permeable waterproof fabric according to claim 1, wherein the thickness of the microporous polyurethane film layer is 5 to 50 µm and the coating amount of the polyurethane resin is 100 to 400 g / m 2. The water vapor-permeable waterproof fabric of claim 1, wherein the moisture-permeable waterproof fabric has a water pressure of 1,000 to 10,000 mmH ₂ O and a water vapor transmission rate of 3,000 to 10,000 g / m 2 · 24 hours.

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