JP2741377B2 - Fabric with improved flexibility - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a woven fabric having excellent pill resistance and drapability and improved flexibility. [Prior Art] Some conventional fiber materials have been modified in resin processing or woven structure in order to impart flexibility. [Problems to be Solved by the Invention] Therefore, the conventional technique has a drawback that the properties of the fiber material used, particularly the surface properties of the fibers, cannot be fully utilized, and only the sacrificed material can be obtained. . In view of this situation, the present invention can utilize 100% of the properties of the fiber material to be used, especially the fiber surface properties, by including fibers made of a specific resin called polytetrafluoroethylene-based fibers, Investigating the fact that the softness of the garment is dramatically improved and achieving the present invention, it has excellent effects not only on the softness but also on the anti-pill property and the drape property, and the performance of the conventional clothing fabric Was remarkably improved. [Means for Solving the Problems] The present invention employs the following means to solve the problems. That is, the woven fabric having improved flexibility of the present invention is a woven fabric composed of a fiber yarn composed of at least one of a natural fiber and a synthetic fiber, wherein at least one of the warp and the weft has a polytetrafluoroethylene-based fiber. At least 30% by weight, and
The polytetrafluoroethylene fiber is mainly contained in a form distributed on the surface of the yarn, and the polytetrafluoroethylene fiber-containing yarn has at least one fiber.
Polytetrafluoroethylene fibers are arranged in a ratio of 5/5. In the present invention, polytetrafluoroethylene (hereinafter referred to as PT
The term “FE-based” means a homopolymer of tetrafluoroethylene or a copolymer in which at least 90 mol%, preferably at least 95 mol% of the whole is tetrafluoroethylene. Such monomers copolymerizable with tetrafluoroethylene include trifluoroethylene, trifluorochloroethylene, tetrafluoropropylene, vinyl fluoride compounds such as hexafluoropropylene and further propylene, ethylene, isobutylene, styrene, acrylonitrile and the like. Examples include, but are not limited to, vinyl compounds. Among these monomers, vinyl fluoride compounds, which are also compounds having a high fluorine content, are preferred from the viewpoint of fiber properties. In the present invention, the PTFE fiber may be a fiber obtained by either melt spinning or wet spinning. The smaller the average fineness, the better, but usually 3.5d
Hereinafter, the fiber is more preferably 2.5 d or less, and the effect of the present invention is higher as the fiber is thinner, particularly 2.0 d or less, further 1.
It is preferably 0d or less. Such PTFE fibers are used in the form of filaments or short fibers. When used in the form of short fibers, those having a fiber length of at least 3 cm, preferably 5 cm or more are used from the viewpoint of entanglement. In the PTFE-based fiber of the present invention, a preferable fiber has a value of 80 cps or less, preferably 50 cps or less, particularly preferably 40 cps or less, when the small-angle X-ray scattering intensity at 2θ = 1 ° is measured by the small-angle X-ray scattering method. On the other hand, the crystal size of the (110) plane measured by the wide-angle X-ray diffraction method (counter method) has a thickness of 95 ° or more, preferably 100 ° or more, and is characterized by excellent strength and dimensional stability. Such a PTFE-based fiber has a strength of 1.0 g / d or more, preferably 1.5 g.
Those having a balance characteristic of not less than / d, not more than 30%, preferably not more than 20%, and not more than 20%, preferably not more than 15%, of dry heat shrinkage (230 ° C. × 30 ′) are preferable. The small-angle X-ray scattering intensity is measured by a small-angle X-ray scattering method (small-angle X-ray diffraction method). The crystal size of the (110) plane is measured by a wide-angle X-ray diffraction method (counter method). The yarn of the present invention is a blended yarn, a blended yarn, a combustible yarn, etc., and furthermore, the core portion is formed of a non-twisted yarn or a twisted yarn, whereas the sheath portion is formed by winding the core portion in a spiral or air entangled. Or a yarn coated with a knitting structure and containing a polytetrafluoroethylene-based fiber mainly distributed on the yarn surface. As the woven fabric of the present invention, woven fabrics such as plain weave and twill can be used, and further, such double woven fabrics and the like can be mentioned. The present invention relates to the use of natural fibers or / and
The PTFE-fiber-containing yarn is arranged at a ratio of one to four normal yarns composed of synthetic fibers (this is expressed as one / five). If the restriction of 1/5 is removed, that is, 1/6
When the number of ordinary fiber yarns increases as in a book, flexibility and utilization of the surface characteristics of the used fiber material are inferior. On the other hand, PT, like 1/5, and 2/5
As more yarns composed of FE-based fibers are arranged, the flexibility and the utility of the surface properties of the used fiber material are extremely improved, and the pill resistance and drape property are also improved. As a method for producing the PTFE-based fiber of the present invention, for example, a mixed solution of viscose and PTFE emulsion is used as a spinning solution, discharged into a coagulation bath, coagulated, and then washed and scoured. After scouring, it is immersed in alkaline water and squeezed, then dried or directly led to a baking step, baking at 300 to 450 ° C., and stretching at least 5 to 10 times. Next, this fired fiber is produced by a method of oxidizing and aging in a high-temperature atmosphere of 300 to 340 ° C. or a method of melting and spinning a PTFE-based copolymer at a melting point or higher of the copolymer or higher. There is a way. According to the above wet spinning method, fibers belonging to an extremely fine class of PTFE fibers of 3.5 d or less can be obtained. The ultrafine PTFE fiber according to the present invention is particularly preferable because of its excellent thread-forming properties, and exhibits the characteristic that the desired properties are easily obtained. Examples of the natural fibers referred to in the present invention include cotton, hemp,
Natural fibers such as silk and wool, and synthetic fibers include ordinary thermoplastic synthetic fibers such as polyester, polyamide, polyacryl, and polyolefin, as well as high-strength products such as those drawn at a high magnification and wholly aromatic polyamide fibers. Thermoplastic synthetic fibers, and thermosetting synthetic fibers such as polyamideimide, polyimide, polysulfone, and polysulfide can be used. The thermoplastic synthetic fiber drawn at a high magnification is a fiber obtained by drawing a polyacrylic, polyethylene, or polyvinyl alcohol-based fiber at least eight times or more. For example, the draw ratio is 15 to 20 times or more for polyacryl, 8 to 12 times or more for polyethylene, and 20 to 25 times or more for polyvinyl alcohol. Such high-strength fibers and thermosetting synthetic fibers have excellent properties of a tensile strength of at least 12 g / d, and more preferably at least 15 g / d. Initial modulus is at least 200g / d and even 30
It has the property of 0 g / d or more. By reinforcing with such high-strength fibers, the degree of freedom in design is expanded. These fibers can be mixed and used in various ways, but in the case of clothing materials, not so strong is required, and the usual 1 to 10 g /
Fibers having d strength can be used without any problem. As an industrial material, a high-strength fiber is preferably used because a high-strength fiber expands the application field of application. The present invention relates to a fiber containing at least 30% by weight, preferably 40% by weight or more of the PTFE-based fiber with respect to the various fibers, and containing the PTFE-based fiber mainly in a form distributed on the yarn surface. Is used. As such yarns, those in the form of the aforementioned blended yarns, blended yarns, combustible yarns, processed yarns, and the like can be used. By using such yarns, the flexibility of the woven fabric is dramatically improved. It was something that could be done. The present invention, by applying ultra-fine PTFE fibers,
This makes it possible to handle the fiber with a normal fabric feeling. That is, since the PTFE fibers have a fineness equal to or smaller than the normal single fiber fineness, normal fiber processing techniques such as blending and knitting can be freely used without any problem. Next, the present invention will be described in more detail with reference to examples. Example 1 Example 1 114 parts of an emulsion containing 60% of a PTFE-based resin dispersed in ion-exchanged water using alkylallyl polyether alcohol as a dispersant, and viscose (8.9% cellulose and 5.4% caustic soda, 29% of carbon disulfide / cellulose amount, 100 parts of the remaining ion-exchanged water) were charged into a vacuum mixer at 8 ° C., and mixed and defoamed at a degree of vacuum of 10 Torr for 21 hours to prepare a spinning stock solution. This stock solution was guided into a die having 240 holes of 0.12 mmφ at a rate of 43 g / min and discharged into a coagulation bath controlled at 23 ° C. at a speed of 23 m / min. Coagulation bath is 7% sulfuric acid, 20% sodium sulfate
% Was dissolved in ion-exchanged water. This coagulated fiber is led to an ion exchange water tank at 80 ° C,
After washing thoroughly and slowly at a speed of m / min and squeezing with a mangle, immersed in an ion exchange aqueous solution having a caustic soda concentration of 0.05 mol / ι, caustic soda was 0.32 wt.
%. The alkali-containing fiber was then fired by contacting a roll heated to 380 ° C. The fired fiber was stretched 7 times while being in contact with a heating roll at 350 ° C. The fiber was left in a relaxed state in an air atmosphere heated to 320 ° C. for 72 hours. The obtained PTFE fiber is white, single yarn fineness 1.7d, strength
1.3g / d, elongation 16.1%, dry heat shrinkage (230 ° C x 30 minutes) 12.3
%. Small angle X of 2θ = 1 ° by small angle X-ray scattering method of this fiber
The X-ray scattering intensity is 38 cps,
The crystal size of the 0) plane was 107 °. 1.6d filament of polyethylene terephthalate fiber
When weaving a plain weave consisting of a yarn consisting of 75d / 36fil (2.0d), a yarn obtained by weaving the polyethylene terephthalate fiber filament with the PTFE-based fiber at 20% by weight is used.
Weft yarns were inserted at a ratio of 1/4. The garment using this fabric as the lining was soft, rich in drape, improved in pill resistance, and free of cling. [Effects of the Invention] The present invention provides a woven fabric which is rich in drape property and excellent in pill resistance and which is excellent in flexibility, and provides a material suitable for clothing and industrial use.

Claims (1)

(57) [Claims] In a woven fabric composed of a fiber yarn composed of at least one of a natural fiber and a synthetic fiber, at least one of the warp and the weft contains at least 30% by weight of a polytetrafluoroethylene-based fiber, and The fluoroethylene fiber is mainly contained in a form distributed on the surface of the yarn, and the polytetrafluoroethylene fiber-containing yarn is a polytetrafluoroethylene fiber in a ratio of at least 1/5. Woven fabric having improved flexibility, characterized in that the woven fabric is arranged. 2. The polytetrafluoroethylene fiber has a single fiber fineness
2. The bulky processed yarn according to claim 1, which is 3.5d or less.