JP2000110072A - Coated fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coated fabric capable of simultaneously achieving both the elimination of dye transfer sublimation and the dimensional stabilization. SOLUTION: This coated fabric is obtained by applying a waterproof processing using an acrylic processing agent, etc., to at least one surface of a woven fabric, which comprises the multi-filament yarns of thermoplastic synthetic fibers, uses false-twisted yarns or twisted yarns comprising sheath-core type conjugate yarns as at least a part of warps and/or wefts, and has the woven fabric cover factor sum of 800-4,000 in the warp and weft directions. The sheath-core type conjugate yarns comprise a polyester-based polymer and a polyamide-based polymer as the core component and the sheath component, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated fabric comprising a multifilament yarn of a thermoplastic synthetic fiber which is suitable for use in a lump or a canvas. By using a false twisted yarn or a twisted yarn obtained from a composite fiber having a core-sheath two-layer structure made of a polyamide-based polymer for at least a part of the original fabric yarn, the quality of the manufactured fabric is excellent. It relates to a coated fabric to be made.

[0002]

2. Description of the Related Art According to the provisions of JIS, waterproofness is a general term for water resistance, water repellency and the like. Conventional methods for applying this to textiles can be broadly divided into the following two. it can. One of them is an impermeable waterproofing process in which the surface of each fiber constituting the woven fabric and the gap between the fibers are completely covered with a hydrophobic substance in a film-like manner and processed so as to prevent the passage of air and moisture. The other is to coat the surface of the fiber with a hydrophobic substance or chemically bond it to give the fiber a water-repellent property, and to process the woven fabric itself so that air can pass freely while remaining porous. It is breathable and waterproof.

[0003] The appendix table of the waterproof test method for textile products specified in JIS L1092-1986 shows that a rubber-based processing agent (processing agent) is used as a processing agent (co-processing agent) for polyacrylic acid ester copolymers used for impermeable waterproofing. , Polyvinylidene chloride-based, polyvinyl chloride-based, polyethylene-based, polyvinyl acetate-based, polyurethane-based, etc., and as processing agents (processing agents) used for breathable waterproofing, paraffin-based, ethylene urea-based, melamine-based, and methylol Acid, silicon, fluorine and the like are described.

[0004] In the rain lodge grounds to which the present invention is applied, impermeable waterproof processing using an acrylic resin as a treating agent has been frequently used in the past because of the ease of processing and the good waterproof effect obtained. Usually, the treatment agent is applied to the fabric or the fabric is immersed in a treatment solution and then dried to provide waterproofness, which is a so-called coating. The acrylic resin coating has sufficient water pressure resistance, but at the same time makes air and water vapor almost impossible to flow, so it is unsuitable for clothing, and awnings and canvas cloths that need the same function as rainslides It is used for bags.

[0005] On the other hand, as for the breathable waterproofing processing, the technical level of the processing has been rapidly improving recently due to the market needs in sportswear and the like and the progress of fibers and related technologies. The content of the conventional technology has been roughly classified into a method using a high-density woven fabric obtained by ultrafine yarn, a method using a microporous membrane larger than the diameter of water vapor and smaller than the diameter of raindrops, and a permeable nonporous membrane. However, any of these methods is not suitable for bulky grounds because the cost is higher than the above-mentioned non-permeable waterproofing and the moisture permeability and the water pressure resistance are opposite.

[0006]

When examining the contents of the bulk land which is one of the objects of the present invention, it is classified into men's, women's rain, and umbrellas depending on the application. The umbrellas need to be well-formed and light-weight and naturally waterproof, and the parasols need to be lightweight and have a refreshing feeling. More recently, there has been a demand for colorful shades and patterns that match the fashion of the overall clothing regardless of the application.

[0007] However, conventionally known synthetic fiber fabrics for bulk material are coated with an acrylic resin at the stage of fabric as described above in order to obtain waterproofness. Diversification has been adversely affected.

That is, as described above, the acrylic waterproof coating has the effect of maintaining the waterproofness and shape retention of the applied woven fabric, but at the same time, in most cases, impairs the dyeability of the woven fabric made of synthetic fibers. I do. In particular, when a polyester filament having a lower dyeing property than a polyamide filament is used as a raw yarn, such a problem becomes remarkable, and sometimes dye transfer sublimation occurs. For example, conventional polyester filament bulks with an acrylic waterproof coating on the fabric are prone to dye migration and sublimation,
Bulk standing in the rear window of a passenger car can sometimes cause this phenomenon soon.

When polyamide filaments are used in place of polyester filaments in order to eliminate such obstacles, it is difficult to obtain good false twisted yarns and twisted yarns due to poor twist setting properties of the polyamide fibers themselves. There are major drawbacks in that weaving yarn is difficult to vary, and dimensional stability is impaired by moisture absorption.

The present invention has been made in view of the above circumstances, and has the same effect as the polyamide filament woven fabric with respect to the transfer sublimation and discoloration of the dye, and has the same dimensional stability and twist setting property as the polyester filament woven fabric. The present invention provides a novel coated fabric having the same characteristics, thereby completely eliminating the problems of the conventional coated fabric in which color transfer of the dye easily occurs and in which form stability is required. .

[0011]

In order to achieve the above object, the present invention has the following arrangement. That is, the coated fabric of the present invention is a woven fabric composed of multifilament yarns of thermoplastic synthetic fibers, and at least a part of the warp and / or the weft, a single yarn core component is a polyester polymer,
Using a false-twisted yarn or a twisted yarn of a core-sheath composite yarn in which the single-sheath component is a polyamide-based polymer, the sum of the woven fabric cover factors in the warp direction and the weft direction is in the range of 800 to 4,000, At least one side of the woven surface is coated with an acrylic processing agent or the like.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. As the raw fabric yarn for the coated fabric according to the present invention, multifilaments of thermoplastic synthetic fibers such as nylon and polyester obtained from ordinary fiber-forming polymers are used. In such a raw yarn, at least a part of the warp and / or the weft has a core component formed of a polyester polymer and a sheath component formed of a polyamide polymer (hereinafter simply referred to as a core sheath). False-twisted yarn or twisted yarn).

In the present invention, since the morphological stability and the stability against dyeing provided by such a core-sheath type composite fiber are simultaneously expressed on the entire surface of the fabric, the false twisted yarn or the twisted yarn is used. Most preferably, the yarn is used for all of the warp yarns. The use ratio of the false twisted yarn or the twisted yarn made of the core-sheath type composite fiber is relatively low when only the warp or the weft is used.
% (Weight ratio). When this falls below 25%,
The effect of using the core-sheath type composite fiber becomes insufficient, and the object of the present invention cannot be achieved. The arrangement in the warp group or the weft group is, of course, uniform, and interlacing is preferred.

The core component of the core-sheath type conjugate fiber used in the present invention is a polyester polymer having a fiber-forming ability, such as polyethylene terephthalate or polyparaethyleneoxybenzol, as a main component.
It is formed of a polyamide-based polymer containing nylon 66 as a main component. The ratio of these two components is 5 / volume ratio.
It is preferably about 1/5, particularly about 3/1 to 1/2. The cross-sectional shape of the core-sheath type composite fiber may be any of a circle, an ellipse, a polygon, and a star, and the core and the sheath may be arranged concentrically or eccentrically. Generally, it is preferable to use one having a circular cross section and a core and a sheath arranged concentrically.

As described above, the core-sheath conjugate fiber used in the present invention is a multifilament in which a plurality of single yarns (core-sheath conjugate fiber) are bundled, and is a processed yarn that has undergone false twisting or twisting. Use in the form of The total number of false twists of the usually used false twisted yarn is 4,000 to 6,000 (T / m) in the case of 30 d nylon fiber, and 2,500 to 4,000 (T / m) in the case of 80 d nylon fiber. / M) In the case of 30d of polyester fiber, it is 4,500-6,500 (T / m). In the case of 80d of polyester fiber, it is 2,900-4,500 (T / m).

The core-sheath type composite fiber used in the present invention is a composite of a nylon fiber and a polyester fiber, and the number of false twists given to this is considered to be appropriate in the middle of the above range. In order to improve the adhesion, the number of false twists is the same as that of nylon fiber. Note that the number of twists in the twisting process may be appropriately set as necessary.

The base fabric for a coated fabric according to the present invention is woven by using a processed yarn composed of the above-mentioned core-in-sheath type composite fiber as a main component of a warp and a weft, and obtains sufficient waterproofness and form stability. For this purpose, a moderate weave density is required.
The sum of the woven fabric cover factors in the warp and weft directions is T
When CF is set, it is necessary to set the range of 800 <TCF <4,000. If the TCF is less than 800, the gap between the woven tissues cannot be sufficiently filled by the coating, and the object of the present invention cannot be achieved. If TCF is 4,
If it exceeds 000, the weight of the base fabric becomes excessive, which impairs the commercial value. The woven fabric used in the present invention may be any of a plain weave, a twill weave, a satin weave, and these weaves, but the plain weave and its weaves are most preferred.

In the present invention, the woven fabric cover factor in the warp direction is represented by the warp density (book / inch) × the square root of the warp denier, and the woven fabric cover factor in the weft direction is the weft density (book / inch) × Indicated by weft denier. The sum of the textile cover factors according to the present invention is the sum of the two.

The woven fabric of this embodiment comprising the above-mentioned yarn and woven structure is then subjected to a coating process. For the coated fabric of the present invention, the breathability preventing treatment described at the beginning is essentially unsuitable, and JIS L 1092-1986.
Using various kinds of thermoplastic synthetic resins and rubbers for impermeable waterproofing described in the appendix of the above, coating treatment is carried out by a known dipping method or batching method to obtain a target fabric. Wherein as the weight of waterproofing agents to be applied to the textile base fabric the base fabric m ² per 0.05% to 1.0% (by weight) is appropriate. The embodiment of the present invention has the above-mentioned configuration, and then the present invention will be described more specifically by way of examples.

[0020]

EXAMPLES Intrinsic viscosity measured at 30 ° C. in 96% sulfuric acid with polyethylene terephthalate having an intrinsic viscosity of 0.85 as a core component measured in O-chlorophenol at 20 ° C.
A core-sheath type conjugate fiber having nylon 6 as a sheath component was spun at a core-sheath ratio (volume ratio) of 1: 1 to obtain a 30d / 12f drawn yarn through a usual process. The drawn yarn was false-twisted by a false twisting machine under the conditions of a heater temperature of 170 ° C. and a number of false twists of 5,000 T / M.

On the other hand, 30d / 12 used in the first embodiment is used.
The drawn yarn of f was twisted with a twisting machine at a twist number of 3,000 T / M, and then the twisted yarn was heat-set at 70 ° C. to obtain a raw yarn B of Example 2.

30 / 12f used in Examples 1 and 2
The same drawn yarn as that of No. 1 was not subjected to false twisting or twisting, and was used as a flat yarn (drawn yarn) as a woven yarn.

A drawn yarn consisting of 100% of the core component used in Example 1, ie, polyethylene terephthalate having an intrinsic viscosity of 0.85 measured in O-chlorophenol at 20 ° C.
100% round cross section, 30d / 12f drawn yarn,
As in Example 1, false twisting was performed with a false twisting machine at a heater temperature of 210 ° C. and a number of false twists of 5,000 T / M.

A drawn yarn composed of 100% of the sheath component used in Example 1, ie, nylon 6 having an intrinsic viscosity of 1.10.
In the same manner as in Example 1, the drawn yarn of d / 12f was false-twisted by a false twisting machine under the conditions of a heater temperature of 170 ° C. and a number of false twists of 5,000 T / M.

The five types of yarns are used for both warp and weft yarns, respectively. The yarn A is used for the woven fabric of Example 1, the yarn B is used for the woven fabric of Example 2, and the yarn C is used for the woven fabric of Comparative Example 1. Is the yarn D
To produce the woven fabric of Comparative Example 2 and the original yarn E to produce the woven fabric of Comparative Example 3. The woven structure was a plain weave of five types, the finish density was 148 yarns / inch, the finish weft density was 110 yarns / inch, and the five woven fabrics had the same woven structure.

The five types of woven fabrics thus obtained were
After scouring through an open soap bar containing 2 g of caustic soda (NaOH) per liter, followed by drying and presetting at a predetermined temperature, substantially the same dyeing was carried out by a liquid jet dyeing machine, and furthermore fluorine-based water repellent. A water-repellent treatment was carried out with the agent, and thereafter, all the woven fabrics of the above Examples and Comparative Examples were coated with 2 g of acrylic resin per m ² to obtain separate coated fabrics. For the dyeing in the jet dyeing machine, Example 1, Example 2, Comparative Example 1 and Comparative Example 3 used an acid dye, and Comparative Example 2 used a disperse dye.

The above five types of coated fabrics were tested for water resistance, presence or absence of pinholes, degree of transfer sublimation, and elongation after immersion treatment, and the results shown in Table 1 were obtained. Water resistance is JIS L 1092-1986
The numerical value shown in Table 1 indicates a water level (mm). Pinhole and transfer sublimation are visual judgments of the presence or absence.
The mark indicates poor quality. Furthermore, the elongation percentage is JIS L 1
096-1990.

[0028]

[Table 1]

As is evident from Table 1, the coated fabrics of Examples 1 and 2 are superior in all respects to those of the comparative examples, indicating high quality.

[0030]

The coated fabric of the present invention has the following effects. That is, preferably, the core-sheath type composite fiber in which the core component is a polyester-based polymer and the sheath component is a polyamide-based polymer is preferably used for all, and at least a part of, the yarns constituting the fabric. Therefore, there is an effect that the dimensional stability and twist setting property of the polyester polymer of the inner layer and the durability against migration sublimation and discoloration of the polyamide polymer of the outer layer can be simultaneously expressed on the coated fabric. In addition, since the woven yarn of the coated fabric of the present invention uses the strongly twisted false twisted yarn or the twisted yarn of the core-sheath type composite fiber, the bulkiness of the yarn increases the adhesiveness of the waterproofing agent, This has the effect of preventing the "folding of the folds" that has conventionally occurred in the fabric. Thus, the coated fabric of the present invention almost completely eliminates the problems of the conventional fabric described at the outset.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Ikawa 35-1, Mizanda, 47, Mizurachi-cho, Sabae City, Fukui Prefecture Inside Kanebo Gosen Co., Ltd. 1 Kanebo Synthetic Fiber Co., Ltd. F-term (reference) 4L033 AA04 AB01 AB03 AB04 AB05 AC03 AC11 AC15 CA18 CA70 4L041 AA07 BA02 BA05 BA21 BC18 BD13 BD14 BD20 CA06 CA21 DD01 DD04 DD14 4L048 AA21 AA24 AA28 AB07 CA21 DA11

Claims (1)

[Claims] 1. A woven fabric comprising a multifilament yarn of a thermoplastic synthetic fiber, wherein at least a part of a warp and / or a weft has a core component of a polyester polymer and a sheath component of a polyamide polymer. Using false twisted yarn or twisted yarn made of type composite fiber, the sum of the woven fabric cover factor in the warp direction and the weft direction is made to be in the range of 800 to 4,000, and at least one side of the woven surface is treated with an acrylic processing agent or the like. A coated fabric characterized by being subjected to waterproofing.