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

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...

AI Technical Summary

Benefits of technology

[0019]Acrylic fibers related to the present invention are preferred to have a single fiber fineness of 1.7 dtex˜6.6 dtex, and the value obtained by multiplying knot strength (cN / dtex) and knot elongation (%) is preferred to be 10˜25.

[0033]The acrylic fibers related to the present invention have excellent anti-pill, bulkiness, compression resistance and elasticity properties, while showcasing a texture similar to that of wool. Apparel products manufactured by using the acrylic fibers have a bulkiness and texture similar to those in wool products, while exhibiting easy-care characteristics with an anti-pill property to compensate for drawbacks inherent in wool.

[0034]In the following, the present invention is described in detail.

[0035]Acrylic fibers of the present invention have a crimp rate of 15% or higher and bulkiness of 380 cm3 / g or greater.

[0036]A crimp rate of 15% or higher provides fiber products with excellent bulkiness and resilience. From such viewpoints, a crimp rate is preferred to be at least 17%, more preferably at least 20%, and its upper limit is preferred to be no greater than 30% because such a rate can prevent the texture of the fiber products from hardening.

[0037]A degree of bulkiness of 380 cm3 / g or greater provides fiber products with excellent bulkiness and resilience. From such viewpoints, the degree of bulkiness is more preferred to be at least 440 cm3 / g, and its upper limit is preferred to be no greater than 600 cm3 / g, because such a degree of bulkiness prevents the texture of the fiber products from hardening.

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.