Fabrics and textile products

Abstract

To provide a fabric and a textile product having not only flame retardancy but also light resistance, abrasion resistance, and excellent strength when exposed to flame or heat.SOLUTION: There is provided a fabric such as a partial double woven fabric obtained by using a yarn 1 containing a para-type wholly aromatic polyamide fiber and a meta-type wholly aromatic polyamide fiber in a mixing ratio (weight ratio) of 20 / 80-80 / 20, and a yarn 2 consisting only of a polybenzoxazole fiber.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to fabrics and textiles that combine not only flame retardancy, but also light resistance, abrasion resistance, and excellent strength when exposed to flame or heat. [Background technology]

[0002] Conventionally, various fabrics have been proposed as fabrics for use in protective clothing such as firefighter suits, etc. However, the fabrics currently in use have a problem in that when exposed to flames or heat even once during firefighting activities, the exposed areas harden, carbonize, and become embrittled, significantly impairing their protective function.

[0003] In order to solve such problems, for example, Patent Document 1 proposes a fabric that combines heat resistance, light weight, weather resistance, and fabric flexibility after flame exposure and carbonization; however, the strength after heat exposure is still insufficient. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-94043 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in view of the above background, and an object of the present invention is to provide fabrics and textile products that have not only flame retardancy but also light resistance, abrasion resistance, and excellent strength when exposed to flame or heat. [Means for solving the problem]

[0006] As a result of extensive research to achieve the above-mentioned object, the inventors have discovered that by cleverly adjusting the type of fibers constituting the fabric, it is possible to obtain a fabric that is not only flame retardant, but also light fastness, abrasion resistance, and even strength when exposed to flame or heat. Further extensive research has led to the completion of the present invention.

[0007] Thus, according to the present invention, there is provided "a fabric characterized by comprising yarn 1 containing para-type wholly aromatic polyamide fiber and meta-type wholly aromatic polyamide fiber in a mixing ratio (weight ratio) of 20 / 80 to 80 / 20 in that order, and yarn 2 consisting only of polybenzoxazole fiber."

[0008] In this case, it is preferable that the total fineness of the yarn 2 is equal to or smaller than that of the yarn 1. It is also preferable that the yarn 1 further contains any fiber selected from the group consisting of polybenzimidazole fiber, oxidized polyacrylonitrile fiber, flame-retardant acrylic fiber, flame-retardant rayon fiber, and flame-retardant polyester fiber. It is also preferable that the yarn 2 is a stretch-break spun yarn having an English cotton count in the range of 10 to 80. It is also preferable that the yarn 2 is a multifilament yarn having a total fineness of 100 to 600 dtex. It is also preferable that the fabric is a partially double woven fabric, the yarn 2 is woven in a lattice pattern in the warp and weft, and the yarn 1 and the yarn 2 are arranged in a ratio of 2:1 to 15:1 in the warp and weft of the fabric. It is also preferable that the exposed ratio of the yarn 1 is 70% or more on the front or back of the fabric. It is also preferable that the fabric is tested using a test device specified in ISO17492 with a heat flux of 84 kW / m 2 It is preferable that the tensile strength retention rate after 10 seconds of exposure to a flame of 180 W / m is 10% or more. In addition, using a super xenon weather meter, the UV irradiation intensity is 180 W / m without changing the ultraviolet ray irradiation surface. 2 Tensile strength retention rate after 350 hours of irradiation under conditions of black panel temperature: 63℃ and no rain It is preferable that the abrasion resistance is 20% or more. In addition, in the abrasion test specified in ISO12947-2 (Martindale), it is preferable that the number of times until the fabric breaks is 20,000 or more.

[0009] The present invention also provides a textile product made from the fabric, the textile product being selected from the group consisting of protective clothing, fire-retardant clothing, fire-fighting clothing, rescue clothing, workwear, police uniforms, clothing for the Self-Defense Forces, and military uniforms. Effect of the Invention

[0010] The present invention provides fabrics and textiles that are not only flame retardant, but also have excellent light resistance, abrasion resistance, and strength when exposed to flame or heat. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing the weave structure used in Example 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, the embodiment of the present invention will be described in detail. First, the fabric of the present invention contains para-type wholly aromatic polyamide fiber (hereinafter sometimes referred to as para-type aramid fiber) and meta-type wholly aromatic polyamide fiber (hereinafter sometimes referred to as meta-type aramid fiber) in a mixing ratio (weight ratio) of 20 / 80 to 80 / 20 as yarn 1. If the weight ratio of the mixing ratio of meta-type aramid fiber exceeds this range, it is not preferable because there is a risk of a decrease in strength after initial heat exposure.

[0013] Here, the para-type wholly aromatic polyamide fiber is preferably a paraphenylene terephthalamide fiber or a coparaphenylene-3,4'-oxydiphenylene terephthalamide fiber, and examples of commercially available products include "Twaron (registered trademark)" and "Technora (registered trademark)". The meta-type wholly aromatic polyamide fiber is a fiber made of a polymer in which 85 mol % or more of the repeating units are m-phenylene isophthalamide. An example of a commercially available product is "Conex (registered trademark)".

[0014] The yarn 1 may be composed of only para-type wholly aromatic polyamide fibers and meta-type wholly aromatic polyamide fibers, or may contain other fibers such as polybenzimidazole fibers, oxidized polyacrylonitrile fibers, flame-retardant acrylic fibers, flame-retardant rayon fibers, and flame-retardant polyester fibers.

[0015] The fabric of the present invention includes not only the yarn 1 but also a yarn 2 consisting of only polybenzoxazole fiber. The yarn 2 is preferably a stretch-break spun yarn having a British cotton count in the range of 10 to 80, or a multifilament yarn having a fineness in the range of 100 to 600 dtex. The polybenzoxazole fiber is preferably a polyparaphenylene benzobisoxazole fiber, and an example of a commercially available product is "Zylon (registered trademark)". By using polybenzoxazole fiber, it is possible to maintain strength after exposure to flame.

[0016] It is also preferable that the total fineness of the yarn 2 is equal to or smaller than that of the yarn 1. If the total fineness of the yarn 2 is larger than that of the yarn 1, the smoothness of the fabric may be reduced, and the abrasion resistance may be reduced. Also, the exposed ratio of the yarn 2 on the front or back surface of the fabric may be increased, and the light resistance of the fabric may be reduced.

[0017] In particular, in order to increase the strength when exposed to flame or heat, and to increase the light resistance when exposed to sunlight, it is preferable that the exposed ratio of the yarn 1 is 70% or more on the front or back surface of the fabric (preferably the front surface (the surface facing the outside air when used)). In particular, the fabric is a partially double woven fabric, the yarn 2 is woven in a lattice pattern in the warp and weft, and the fabric In the warp and weft, the yarn 1 and the yarn 2 are preferably arranged in this order at a ratio of 2:1 to 15:1 (more preferably 3:1 to 10:1).

[0018] The fabric thus obtained has excellent flame retardancy, light resistance, abrasion resistance, and strength when exposed to flame or heat. The strength retention rate was measured using a test device specified in ISO17492 under a heat flux of 84 kW / m 2 After exposing it to a flame for 10 seconds, a tensile test specified in ISO13934-1 is carried out, and it is preferable that the tensile strength is 10% or more in the warp direction or the weft direction. In addition, using a super xenon weather meter, without changing the ultraviolet ray irradiation surface, the UV irradiation intensity is 180 W / m 2 After 350 hours of irradiation at a black panel temperature of 63°C and no rain, the tensile strength retention is preferably 15% or more, more preferably 20% or more. In addition, in the abrasion test specified in ISO12947-2 (Martindale), the number of times until the fabric breaks is preferably 20,000 or more.

[0019] Next, the textile product of the present invention is any textile product selected from the group consisting of protective clothing, fire-retardant clothing, fire-fighting clothing, rescue clothing, workwear, police uniforms, clothing for the Self-Defense Forces, and military uniforms, which uses the above-mentioned fabric. Since such textile products use the above-mentioned fabric, they have not only flame retardancy, but also light resistance, abrasion resistance, and excellent strength when exposed to flame or heat. EXAMPLES

[0020] EXAMPLES Next, examples and comparative examples of the present invention will be described in detail, but the present invention is not limited to these.

[0021] (1) Tensile strength and tensile strength retention after heat exposure Using a test device specified in ISO17492, heat flux was 84kW / m 2 After exposure to a flame for 10 seconds, a tensile test was performed according to ISO 13934-1. Tensile strength retention rate (%) = tensile strength after heat exposure ÷ initial tensile strength × 100

[0022] (2) Tensile strength and tensile strength retention rate after UV irradiation Using a super xenon weather meter, the UV irradiation intensity is 180W / m without changing the UV irradiation surface. 2 After irradiation treatment for 350 hours under conditions of black panel temperature: 63°C and no rainfall, a tensile test specified in ISO13934-1 was performed. Tensile strength retention rate (%) = tensile strength after UV irradiation ÷ initial tensile strength × 100

[0023] (3) Abrasion resistance Abrasion tests were conducted according to ISO12947-2 (Martindale).

[0024] [Example 1] A spun yarn (count: 30 / 2) made by mixing paraphenylene terephthalamide fiber (Teijin Limited, "Twaron (registered trademark)") and polymetaphenylene isophthalamide fiber (Teijin Limited, "Conex (registered trademark)") in a mixing ratio of 60:40 was used as yarn 1. A stretch-broken spun yarn (English count: 30 / 2) made only of polybenzoxazole fiber (Toyobo Limited, "Zylon (registered trademark)") was used as yarn 2.

[0025] Next, the warp yarns were arranged in a ratio of 3:1 (Yarn 1:Yarn 2) and the weft yarns were arranged in a ratio of 2:1 (Yarn 1:Yarn 2). The fabric density was 80 threads / inch (2.54 cm) in the warp and 55 threads / inch (2.54 cm) in the weft to produce a partially double-layered fabric as shown in Figure 1. The fabric had a basis weight of 200 g / m 2 The ratio of yarn 2 exposed on the surface of the fabric was 12%. Table 1 shows the results of measurements of the tensile strength in the longitudinal direction before and after heat exposure, the tensile strength in the longitudinal direction after irradiation with a super xenon weather meter, and the abrasion resistance.

[0026] [Example 2] The same procedure as in Example 1 was carried out, except that a stretch-break spun yarn (English count: 30 / 1) of polybenzoxazole fiber ("Zylon (registered trademark)" manufactured by Toyobo Co., Ltd.) was used as yarn 2.

[0027] [Example 3] Example 1 was repeated, except that yarn 1 was a spun yarn (English count: 30 / 2) made by mixing polymetaphenylene isophthalamide fiber (Teijin Limited, "Conex (registered trademark)"), coparaphenylene-3,4'-oxydiphenylene terephthalamide fiber (Teijin Limited, trade name: Technora (registered trademark)), and polyparaphenylene benzbisoxazole fiber (Toyobo Co., Ltd., "Zylon (registered trademark)") in a mixing ratio of 60:30:10.

[0028] [Comparative Example 1] Example 1 was repeated, except that yarn 2 was a spun yarn (English count: 30 / 2) made of a mixture of polymetaphenylene isophthalamide fiber (Teijin Limited's "Conex (registered trademark)"), coparaphenylene-3,4'-oxydiphenylene terephthalamide fiber (Teijin Limited, trade name: Technora (registered trademark)), and polyparaphenylene benzbisoxazole fiber (Toyobo Limited's "Zylon (registered trademark)") in a ratio of 60:30:10.

[0029] [Table 1] [Industrial Applicability]

[0030] According to the present invention, fabrics and textile products are provided which not only have flame retardancy but also light resistance, abrasion resistance, and excellent strength when exposed to flame or heat, and which are of extremely great industrial value.

Claims

1. The fabric comprises a yarn 1 containing a para-type wholly aromatic polyamide fiber and a meta-type wholly aromatic polyamide fiber in a mixing ratio (weight ratio) of 20 / 80 to 80 / 20 in that order, and a yarn 2 consisting of only polybenzoxazole fiber.

2. The fabric of claim 1 , wherein the total fineness of said yarn 2 is equal to or smaller than the total fineness of said yarn 1 .

3. The fabric according to claim 1 or 2, wherein the yarn 1 further comprises any one of fibers selected from the group consisting of polybenzimidazole fibers, oxidized polyacrylonitrile fibers, flame-retardant acrylic fibers, flame-retardant rayon fibers, and flame-retardant polyester fibers.

4. The fabric according to any one of claims 1 to 3, wherein the yarn 2 is a stretch-break spun yarn having a British cotton count in the range of 10 to 80.

5. The fabric according to any one of claims 1 to 3, wherein the yarn 2 is a multifilament yarn having a total fineness of 100 to 600 dtex.

6. The fabric according to any one of claims 1 to 5, wherein the fabric is a partially double woven fabric, the yarn 2 is woven in a lattice pattern in the warp and weft, and the yarn 1 and the yarn 2 are arranged in a ratio of 2:1 to 15:1 in the warp and weft of the fabric.

7. The fabric according to any one of claims 1 to 6, wherein an exposed ratio of the yarn 1 on the front or back surface of the fabric is 70% or more.

8. Heat flux 84kW / m using a test device specified in ISO17492 ２ The fabric according to any one of claims 1 to 7, which has a tensile strength retention rate of 10% or more after exposure to a flame of 100 for 10 seconds.

9. Using a super xenon weather meter, without changing the ultraviolet irradiation surface, UV irradiation intensity: 180 W / m ２ The fabric according to any one of claims 1 to 8, which has a tensile strength retention of 20% or more after irradiation treatment for 350 hours under conditions of a black panel temperature of 63°C and no rainfall.

10. The fabric according to any one of claims 1 to 9, which can be subjected to 20,000 or more abrasion tests before the fabric breaks in an abrasion test specified in ISO 12947-2 (Martindale).

11. A textile product selected from the group consisting of protective clothing, fire-retardant clothing, fire-fighting clothing, rescue clothing, workwear, police uniforms, Self-Defense Force clothing, and military uniforms, which uses the fabric according to any one of claims 1 to 10.

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