JP2000234236A - Reinforced fabric - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a woven fabric for clothing and a jeans-like woven fabric which is excellent in light resistance, has improved tear strength in the vertical and horizontal directions, and is worn under severe environments such as outdoor and motorcycle sports. It is in. A reinforced yarn comprising a yarn composed of a functional fiber having a fiber strength of at least 12 g / d as a core and a multifilament composed of a light-resistant fiber or a double-layered yarn having a short fiber as a sheath is used as a light-resistant fiber. A reinforced fabric which is woven as a warp and / or weft separate from the basic structure on the back side of the basic fabric composed of

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced fabric having excellent light resistance, and more particularly to a woven fabric reinforced with high-strength functional fibers and having enhanced tear strength, abrasion strength and the like. This reinforced fabric is useful for clothing fabrics and jeans-like fabrics worn in harsh environments such as outdoor and motorcycle sports.

[0002]

2. Description of the Related Art In the field of outdoor sports such as mountain climbing, fishing and motorcycles, unexpected situations of natural opponents occur, so conventional clothing materials are not satisfactory, and higher functionality such as tear strength is required. I have.

On the other hand, various functional fibers have been put on the market, and their application to clothing has been attempted. For example, these functional fibers such as para-aramid fibers, PBO fibers, and polyarylate fibers have a high strength of 12 g / d or more, unlike general-purpose fibers such as nylon, polyester fibers, and acrylic fibers. When these highly functional fibers and general-purpose fibers are used in combination, improvements in tensile strength, tear strength, abrasion strength and the like are expected.

[0004] For example, Japanese Patent Publication No. 1-36600 and Japanese Patent Publication No. Sho 62-26900 disclose para-aramid fibers.
It has been proposed to interweave 00% of filaments and spun yarns with partial use. It is stated that this method provides an improvement in tear strength. However, these high-performance fibers generally have a benzene ring in the main chain of the fiber molecule, and therefore have poor light resistance compared to general-purpose fibers such as polyester and nylon, and long-term exposure to sunlight depends on the ultraviolet light contained in them. It reduces the strength of the functional fiber and also changes the color. Therefore, there is a problem in applying a 100% functional fiber filament or spun yarn to a clothing material that is always exposed to sunlight outdoors when worn or washed. In addition, these functional fibers have a specific color such as yellow or brown, and although they are partially used, the use of them barely in clothing fabrics poses a problem in terms of aesthetics.

As a means for improving these problems, the present inventors disclosed in Japanese Patent Application Laid-Open No. 10-130990 that a core yarn having an aramid fiber as a core and a light-resistant fiber such as cotton as a sheath was used as a weft, and a light-resistant fiber was further used. The warp consisting of is arranged on the front side of the woven fabric, the weft is arranged on the back side and the woven fabric is made of warp or twill, and the structure in which the aramid fiber is substantially concealed by the light-resistant fiber has excellent light resistance. A reinforced fabric was proposed. In this reinforced woven fabric, the tear strength for cutting the weft is greatly improved because the core yarn having a high-strength aramid fiber as the core is arranged on the weft, but the reinforcement in the warp direction is not performed. The tear strength was unbalanced.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, to improve light resistance, to improve the tear strength in the vertical and horizontal directions, and to improve outdoor and motorcycle sports. It is an object of the present invention to provide a reinforced fabric suitable for clothing and jeans worn under a severe environment.

[0007]

To achieve the above object, the present invention takes the following measures. (1) A reinforcing yarn consisting of a double-layered yarn having a core made of a yarn having a single fiber strength of 12 g / d or more and a sheath made of a multifilament or short fiber is provided on the back side of the woven fabric with a basic structure. A reinforced fabric woven as another warp and / or weft.

(2) The reinforced fabric according to (1), wherein the basic structure is warp satin or twill weave, and the reinforced yarn is used for at least a part of the weft.

(3) The reinforced fabric according to (1) or (2), wherein the weight ratio of the core portion is 3 to 70% of the two-layer structure yarn.

(4) The reinforced fabric according to any one of (1) to (3), wherein the core portion is a thread.

(5) The reinforced fabric according to (4), wherein the core yarn is a spun yarn.

(6) The reinforced fabric according to any one of the above (1) to (5), wherein the fibers of the core are para-aramid fibers.

(7) The core according to the above (1), wherein the core yarn is a stranded yarn obtained by twisting two or more spun yarns.
The reinforced fabric according to any one of (1) to (6).

(8) The reinforced fabric according to any one of (1) to (7), wherein the fiber of the sheath is cotton.

(9) The reinforced fabric according to any one of the above (1) to (8), which is for clothing.

(10) The reinforced fabric according to any one of the above (1) to (8), which is used for jeans.

(11) Jeans characterized by using the reinforced fabric according to any of (1) to (8).

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a two-layer structure yarn is used as a warp or a weft, or a warp and a weft of a woven fabric. In the present invention, a high-strength reinforcing fiber is used as the core yarn of the two-layer structure yarn. As the reinforcing fibers, for example, functional fibers such as para-aramid fibers, polyparaphenylenebenzobisoxazole (PBO) fibers, polyarylate fibers, and ultrahigh molecular weight polyethylene fibers can be used. More specifically, the para-aramid fiber is a para-based wholly aromatic polyamide fiber, such as polyparaphenylene terephthalamide and copolyparaphenylene-.
There is 3,4'-oxydiphenylene terephthalamide.

The single fiber strength of the functional fiber is intended to be 12 g / d or more, preferably 15 g / d or more. If the single fiber strength is less than 12 g / d, the tear strength of the woven fabric is not sufficiently improved.

Ultrahigh molecular weight polyethylene fibers are excellent in light resistance among these functional fibers, but are inferior in heat resistance and are easily melted by cigarette fire or frictional heat.

These problems can be solved by using a two-layer structure yarn in which high-performance fibers are arranged in the core and light-resistant fibers such as cotton are arranged in the sheath. The form of the functional fiber constituting the core of the two-layer structure yarn as the reinforcing yarn may be an aggregate, and for example, it may be twisted or not. A spun yarn, a drawn-off spun yarn, an air entangled yarn, a filament or the like can be used, but a spun yarn is preferable in terms of feeling and strength. A multifilament, a short fiber, or a spun yarn can be used for the sheath.

Further, the functional fiber in the reinforcing yarn is substantially woven by weaving the reinforcing yarn comprising the two-layer structure yarn on the back side of the light-resistant fiber as a warp and / or weft different from the basic structure. Since light is covered twice, light resistance can be improved.

The light-resistant fibers used for the sheath and the basic fabric include cotton, wool, hemp, polyester, nylon, acrylic fiber, etc., with cotton being particularly preferred. Cotton not only has excellent light fastness in terms of physical properties, but also has no heat-fusing property like many functional fibers, and it is carbonized without melting when exposed to high temperatures. Less risk of burns.

FIG. 1 shows an example of a complete structure of a reinforced fabric, which is a warp double fabric in which a basic structure 3/1 twill is reinforced with a back warp.
The fabric is made by repeating this one complete structure. The warp yarns 1, 2, 4, 5 and the weft yarns 11, 12, 13, 14 form a basic structure. The crosses indicate the floating of the warp in the basic structure and indicate that the warp is above the weft. The white outline indicates the floating of the weft and indicates that the weft is on the warp. This basic structure is a twill weave and has a lot of warp floats, indicating that the warp is mainly arranged on the front side of the woven fabric and the weft is arranged on the back side.

The painted portion of the back warp A is floating,
Although floating above the weft of the basic structure, the white portion sinks below the weft of the basic structure, and most of the back warp A is disposed on the back side of the fabric.

By using a reinforcing yarn consisting of a two-layer structure yarn as the weft, the tear strength in the weft cutting direction is improved. Further, by forming a back warp different from the base structure on the back side of the base structure with the reinforcing yarn, the tear strength in the direction of cutting the warp is improved, and thus the tear strength in both the warp and weft is improved. Since the reinforcing yarn used as the weft and the back warp in the basic structure is covered from the front side by the warp in the basic structure, the functional fibers in the reinforcing yarn are shielded from light.

FIG. 2 is a fabric structure diagram obtained by repeating the complete structure of FIG. Back warp A is warp 4 of the basic structure
It can be seen that one is inserted for each book.

FIG. 3 shows that back warps A and back warps B are alternately arranged. (The mark ● indicates the float of the back warp B, indicating that it is above the weft of the basic structure.)

The basic organization is 2/1, 4 in addition to 3/1
/ 1, 5/1, 5/2, 6/1, 4/2, 7/1, 5 /
Two layers can be applied. As a sutra, four, five,
7 sheets, 8 sheets, etc. can be applied.

The double-layered yarn used as the reinforcing yarn in the present invention is produced, for example, by the method shown in FIG. FIG.
, The guide roller 2 which is unwound from the Shino winding 1a
a, the short fiber of the light-resistant fiber A supplied through the front roller 3 is flattened by the front roller 3 and the functional fiber B is fed out from the bobbin 1b through the guide roller 4.
Is joined to the central part of the light-resistant fiber A which is spread flat. Then, when a suitable twist is applied on the downstream side, the light-resistant fiber A spread flat and wraps around the functional fiber B and is wound around the bobbin 6 through the guide 5 to obtain a double-layered yarn C Is obtained.

The double-layered yarn can be produced, for example, by a friction spinning machine. By supplying the spun yarn or filament of the functional fiber to the rotor part separately from the sliver of the light-resistant fiber supplied to the friction spinning machine, the spun yarn of the functional fiber is wrapped by the light-resistant fiber and has a two-layer structure yarn. Becomes

In the present invention, when a spun yarn is used as a reinforcing yarn in the core portion of the two-layer structure yarn, a single yarn may be used, but using a twine of the same thickness is more effective for further improving the tear strength. And more desirable. "Boro yarn" is a yarn in which two or more yarns are aligned and aligned in the direction opposite to the ply twist.

For example, in the case of using a double yarn 60 s / 2 obtained by combining two single yarns, which are a kind of batted yarn, as the reinforcing yarn, the tear strength is greater than in the case of using the single yarn 30 s / 1. . Here, the double yarn 60s / 2 and the single yarn 30s / 1 are equivalent in thickness.

In the processing step of the core-sheath yarn, the use of a yarn having a stable strength in the length direction has a smaller number of yarn breaks and a better workability than a single yarn having a weak portion.

Normally, a single yarn of a spun yarn has a portion having a low tensile strength in the length direction of the spun yarn due to twist unevenness and thickness unevenness. Therefore, the single yarn of the spun yarn tends to be cut due to stress applied to a portion having a low tensile strength. on the other hand,
In the case of a stranded yarn in which two or more spun yarns are twisted, even if there is a weak portion in one yarn, the other twisted yarn compensates for the weak portion, so that the drop in tensile strength as the stranded yarn is small. In fact, when weaving a spun yarn having a cotton count of 20 s / 1 or less as a warp yarn, it is generally practiced to perform warp sizing to increase the strength and prevent breakage of the yarn. No warp gluing is required because warp breakage in the weaving process hardly occurs.

The core of the double-layered yarn as the reinforcing yarn may be a filament, a short fiber, or a spun yarn, but a spun yarn is preferable in terms of texture and strength. The strength of the spun yarn of the functional fiber is reflected in the strength of the two-layer structure yarn. Further, the weight ratio of the core portion is preferably 3 to 70% of the two-layer structure yarn.

In the case of a homogeneous blended yarn of a functional fiber and a light-resistant fiber, if the content of the functional fiber is 50% by weight or less, it is not suitable as a reinforcing yarn. In the case of a uniform blended yarn in which two or more types of fibers are uniformly mixed to form a blended yarn in a mixing process, a carding process, a drawing process, etc. of a spinning process, the tensile elastic moduli of the two or more types of fibers to be mixed are almost the same. If so, the tensile strength of both will be reflected in the blended yarn.

However, since the tensile elastic modulus of the functional fiber is high and the tensile elastic modulus of the light-resistant fiber is generally low, it is difficult for the tensile strength of the high-strength functional fiber to be reflected on the tensile strength of the uniform blended yarn. In particular, the ratio of functional fibers is 50
When the amount is less than 10% by weight, the high tensile strength of the functional fiber does not contribute to the tensile strength of the homogeneous blended yarn, and a high strength uniform blended yarn cannot be obtained, which is not preferable as the reinforcing yarn of the present invention. When the proportion of the functional fiber is 50% by weight or more, the strength of the functional fiber is reflected in the tensile strength of the uniform blended yarn,
A high-strength homogeneous blended yarn can be obtained and can be preferably used as the reinforcing yarn of the present invention.

[0039]

The present invention will be described below in detail with reference to examples. The physical property test method of the woven fabric was based on the following method. [Tear Strength] The tear strength was measured by a tear strength D method (pendulum method) specified in JIS L 1096.

[Abrasion Strength] According to the A-1 method (flat wear) defined by JIS L 1096, A-50 sandpaper is used, and the weight is 0.68 k.
g and air pressure were 0.28 kg / cm ² .

Para-aramid fiber (trade name: Kevlar®) staple 1.5d-51 manufactured by Toray DuPont
mm (single fiber strength 23 g / d, tensile modulus 565 g
/ D, elongation 3.8%) 30s / 1
Was used as a core portion, and cotton short fibers were used as a sheath portion to prepare a double-layer yarn having a cotton count of 6 s / 1 and 10 s / 1 by the method shown in FIG. Table 1 shows these physical properties.

Table 2 shows the physical properties of a cotton yarn, a spun yarn made of 100% of the para-aramid fiber, and a uniformly mixed yarn of cotton and para-aramid fiber. Thread No. c is a commercially available cotton spun yarn for warp dyed by indigo dyeing.

Using these yarns, a jeans-like warp double woven fabric reinforced with back warps was woven with the basic structure 3/1 twill fabric shown in FIG. Comparative Examples 3 and 4 are 3/1 twills (normal jeans fabric) without back warp. Table 3 shows the thread usage and weaving content, and Table 4 shows the reinforcing content by the reinforcing yarn. Table 5 shows the measurement results of the physical properties of the fabric. Consider these results.

In Example 1, a two-layer structure yarn was used as a reinforcing yarn for the front weft yarn and the back warp yarn. The tear strength was about twice as large in both warp and weft cutting than without the reinforcing yarn of Comparative Example 4. The appearance seen from the front side was equivalent to the normal jeans fabric of Comparative Example 4.

In Example 2, double-layer structured yarn was used for the front weft, and double-layer structured yarn and cotton yarn were alternately used for the back warp. The tear strength of the woven fabric was about twice that of Comparative Example 4 for both warp and weft cutting.

Example 3 has the same woven fabric structure as Example 2, except that the twin yarn (60 s / 2) made of the para-aramid fiber is used as the reinforcing yarn of the two-layer structure yarn. Reinforced yarn 60s
The thickness of / 2 is equivalent to 30 s / 1 used in Example 2, but the tear strength of the woven fabric is about 20% higher than that of Example 2 in both warp and weft cutting.

In Comparative Example 1, a two-layer structure yarn was used as the front weft yarn and a 100% aramid (Kevlar (R)) spun yarn was used as the back warp yarn. The tear strength was about twice that of Comparative Example 4 for both warp and weft cutting, but the yellow color of the aramid yarn was problematic from the front side.

In Comparative Example 2, as the reinforcing yarn, a two-layer structure yarn was used as the front weft yarn, and a uniform blend yarn of 30% aramid (Kevlar (R)) 30% cotton was used as the back warp yarn. No reinforcing effect in the warp direction was obtained.

In Comparative Example 3, a two-layer structure yarn was used as the surface weft, and the surface warp was a cotton yarn. There is no back warp. The tear strength in the weft cutting direction is about twice that of Comparative Example 4, but the tear strength in the warp cutting direction is about の of the weft cutting direction.
Therefore, when the tearing strength is unbalanced and the tearing stress is applied, the stress concentrates on the weaker tearing strength, and the effect of improving the tearing strength cannot be exhibited.

Comparing the abrasion strengths shown in Table 5, Example 2 showed a 27% improvement over Comparative Example 4.

[0051]

[Table 1]

[0052]

[Table 2]

[0053]

[Table 3]

[0054]

[Table 4]

[0055]

[Table 5]

[0056]

As described above, the present invention uses the high strength of the functional fiber to remarkably improve the tear strength in the warp and weft directions and also improves the wear strength. In addition, the reinforcing fiber of the two-layer structure yarn using the functional fiber as the core and the structure that shields the functional fiber from light by the double woven structure, and the woven pattern on the front side of the woven fabric does not change. Aesthetics can be maintained. As a result, it is possible to provide clothing used outdoors, such as outdoor and motorcycle wear, as well as clothing fabrics and jeans that require other functions.

[Brief description of the drawings]

FIG. 1 is a woven fabric diagram showing an example of a warp double woven fabric reinforced with a back warp applied to the present invention.

FIG. 2 is a woven fabric diagram for explaining the arrangement and ratio of warp and back warp of a basic woven fabric.

FIG. 3 is a woven fabric diagram illustrating the arrangement of two types of back warps.

FIG. 4 is a schematic process diagram illustrating an example of a method for producing a two-layer structure yarn having a functional fiber as a core and a light-resistant fiber as a sheath according to the present invention.

[Explanation of symbols]

 1a: Shinomaki 1b: Bobbin 2a, 2b: Feeding guide roller 3: Front roller 4: Guide roller 5: Guide 6: Bobbin 7: Bottom roller 8: Bobbin A: Light resistant fiber B: Aramid fiber C: Double-layered yarn S: spindle V: drive belt

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 598100885 Bo & Arrow Co., Ltd. 1-1-1, Nanakita-cho, Izumi-ku, Sendai-shi, Miyagi (72) Inventor Takeshi Hatano 3-4-1-18 Nakanoshima, Kita-ku, Osaka-Toray Dupont Co., Ltd. Osaka Head Office (72) Inventor Toshinori Fujita 1-1-1, Oe, Otsu City, Shiga Prefecture Inside the Seta Plant of Toray Industries Co., Ltd. Morikawa Twisted Yarn Co., Ltd. (72) Inventor Yasuhiro Hino 1-1-1, Nanakita Tachimachi, Izumi-ku, Sendai, Miyagi Prefecture Inside Bo & Arrow Co., Ltd. 1-chome F-term in Bo & Arrow Co., Ltd. (Reference) 4L036 MA06 MA09 MA35 PA21 PA31 RA24 UA07 UA10 4L048 AA08 AA25 AA48 AA53 AB01 AB 16 AB18 AB19 AC09 AC14 BA01 BA02 CA01 CA06 DA01 DA03

Claims (11)

[Claims] 1. A reinforcing yarn comprising a double-layered yarn having a fiber having a single fiber strength of 12 g / d or more as a core and a multifilament or a short fiber as a sheath is formed on the back side of the woven fabric separately from the basic structure. Reinforced fabric woven as warp and / or weft. 2. The reinforced woven fabric according to claim 1, wherein the base structure is warp satin or twill weave, and the reinforced yarn is used for at least a part of the weft. 3. The weight ratio of the core to the double-layered yarn is 3 to 3.
The reinforced fabric according to claim 1 or 2, wherein the reinforced fabric is 70%. 4. The reinforced fabric according to claim 1, wherein the core is a thread. 5. The reinforced woven fabric according to claim 4, wherein the core yarn is a spun yarn. 6. The reinforced woven fabric according to claim 1, wherein the core fiber is a para-aramid fiber. 7. The reinforced woven fabric according to claim 1, wherein the core yarn is a stranded yarn obtained by twisting two or more spun yarns. 8. The reinforced fabric according to claim 1, wherein the fiber of the sheath is cotton. 9. The method according to claim 1, which is for clothing.
8. The reinforced woven fabric according to any one of 8 above. 10. The reinforced fabric according to claim 1, which is for jeans. 11. A jeans comprising the reinforced fabric according to any one of claims 1 to 8.