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Acrylic fibers, method for manufacturing same, and spun yarn and knitted fabric using said fibers

a technology of acrylic fibers and fibers, which is applied in the field of acrylic fibers, can solve the problems of not reaching the level of wool, difficult to achieve stable side-by-side formation and sufficient bulkiness, and difficulty in achieving the target texture, etc., to prevent the texture of the fiber products from hardening, excellent bulkiness and resilience, and excellent anti-pill

Inactive Publication Date: 2017-02-16
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is related to acrylic fibers that have excellent properties including anti-pill, bulkiness, compression resistance, and elasticity. These fibers show a texture similar to wool and can be used to manufacture apparel products with the same properties as wool, but with easier care. The acrylic fibers have a crimp rate of 15% or higher and a bulkiness of 380 cm3 / g or greater. The fibers should also have a single fiber fineness of 1.7 dtex˜6.6 dtex and a knot strength value of 10˜24. These properties make the acrylic fibers ideal for use in various applications such as apparel and home textiles.

Problems solved by technology

However, the compression resistance and elasticity of acrylic fibers have not reached the level of wool.
These bicomponent fibers are manufactured by layering spinning dopes using a multi-layer system, but it is difficult to achieve a stable side-by-side formation and sufficient bulkiness.
However, the target texture has not been achieved as they do not exhibit bulkiness and resilience similar to those of wool.
Bicomponent fibers formed by such a method have bulkiness and are capable of producing bulky fabrics.
However, when the fibers undergo hot water treatment during a dyeing process, shrinkage along the fiber axis direction tends to occur, causing the texture to harden after shrinkage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0098]Spinning dopes were prepared by respectively dissolving copolymers (A) and (B) specified in Table 1 in a dimethylacetamide (DMAc) solvent to have a solid content of 24 mass %. In a 40° C. wet-spinning bath consisting of dimethylacetamide (DMAc) and water with a solvent concentration of 55%, the spinning dopes were discharged at a ratio of 50 mass % of copolymer (A) and 50 mass % of copolymer (B) from a bicomponent spinning nozzle and coagulated to be side-by-side. Next, after primary drawing was conducted in hot water at a draw ratio of 4.5 times, an oil agent was applied, dried by using a 150° C. hot roller, and then the fiber was crimped. Then, relaxation heat treatment was conducted on the fiber bundle under saturated steam pressure of 160 kPa to make fine crimps apparent. The fine crimps were set to be temporarily latent by conducting secondary drawing at a draw ratio of 1.1 times, and crimped again for spinning. The fiber was then cut into 51 mm-long pieces. A fiber with ...

example 2

[0099]A fiber was obtained through the same process as that employed in Example 1 except that the solvent concentration, the spinning bath temperature and the single fiber fineness were changed to those specified in Table 1. The fiber was spun, knitted and dyed in the same way as in Example 1. The results are shown in Table 1.

example 3

[0100]A fiber was obtained through the same process as that employed in Example 1 except that the composition of copolymer (A) and single fiber fineness were changed to those specified in Table 1. The fiber was spun, knitted and dyed in the same way as in Example 1 The results are shown in Table 1

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Abstract

Provided are: acrylic fibers having 2-7% boiling water shrinkage and formed by the side-by-side conjugation of a copolymer A, which contains 5-10 mass % of an unsaturated monomer that can form a copolymer with acrylonitrile units, and a copolymer B, which contains 2-5 mass % of unsaturated monomer units that can form a copolymer with acrylonitrile units and 0.2-1.5 mass % of sulfonic acid group-containing monomer units; a method for manufacturing said fibers; a spun yarn containing said fibers; and a knitted fabric obtained from said spun yarn. The single fiber fineness of the heat-treated acrylic fibers is 1.7-6.6 dtex, the bulkiness is at least 380 cm3 / g, the percentage of crimp is at least 15%, and the product (DKSDKE) of the knot strength (cN / dtex) and the knot elongation (%) is 10-25. The acrylic fibers have excellent crimp characteristics and anti-pilling properties.

Description

FIELD OF THE INVENTION[0001]The present invention relates to acrylic fibers with excellent crimp and anti-pill properties, and a method for manufacturing such acrylic fibers. The present invention also relates to spun yarns and knitted fabrics formed using such acrylic fibers.BACKGROUND ART[0002]Acrylic fibers have bulkiness and heat-retention properties similar to those of wool, and are dyeable to distinct colors with excellent fastness, while having excellent properties such as lightfastness and anti-corrosion. Acrylic fibers are used in a wide range of apparel, interior and materials applications.[0003]Wool exhibits excellent bulkiness, compression resistance and elasticity, and acrylic fibers are said to have similar properties to those of wool. However, the compression resistance and elasticity of acrylic fibers have not reached the level of wool. Studies have been conducted accordingly to make acrylic fibers more similar to wool.[0004]For example, JP S63-190019A (Patent Litera...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01F8/08D01D1/02D02G1/00D01D5/32D02G3/04D04B1/20D01D5/06
CPCD01F8/08D04B1/20D01D1/02D01D5/06D10B2401/16D02G3/045D02G1/004D10B2401/046D10B2401/061D01D5/32D01D5/22D02J1/228D02J1/22
Inventor OMIYAJI, NAOKINAKAHASHI, SHINGOONOHARA, YUKIO
Owner MITSUBISHI CHEM CORP
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