Elastic polyester fiber with low melting point and preparation method of elastic polyester fiber

Abstract

The invention relates to an elastic polyester fiber with a low melting point and a preparation method of the elastic polyester fiber. After elastic polyester is prepared by using phthalic acid (terephthalic acid and isophthalic acid), glycol, polytetrahydrofuran, a glass-transition temperature modifier (M-phthalate sulfonate) and a macromolecular modulus modifier (aliphatic ester or long-chain diol of which the number of carbon atoms is more than or equal to 5) as main reaction raw materials, the elastic polyester fibers with the low melting point is prepared by spinning, and when in spinning,the material of metal sand in a spinning component is Ni. The prepared elastic polyester fibers with the low melting point are made of elastic polyester, and molecular chains of the elastic polyesterare composed of phthalic acid chain segments, glycol chain segments, polytetrahydrofuran chain segments, glass-transition temperature modifier chain segments and macromolecular modulus modifier chainsegments; and the total content of acetaldehyde and butenal in the elastic polyester fibers with the low melting point is less than 0.5ppm. According to the elastic polyester fiber with the low melting point and the preparation method of the elastic polyester fiber, occurrence of an adhesion phenomenon can be avoided while fiber softness is improved, and the content of aldehyde compounds in the fiber is reduced.

Description

technical field

[0001] The invention belongs to the technical field of polyester fibers, and relates to a low-melting point elastic polyester fiber and a preparation method thereof. Background technique

[0002] Polyester fibers are strong, durable, wrinkle-resistant, stiff, washable and wearable, and versatile, making them one of the most in-demand and fastest-growing synthetic fibers. Despite the excellent performance of polyester fibers, conventional and single polyester fibers have been unable to meet people's various needs. To improve this situation, the diversification of polyester fibers must be accelerated.

[0003] Polyester elastic fiber has good dimensional stability and low modulus, the fiber and its products have soft hand, good abrasion resistance and fiber crimp, excellent tensile elasticity and compression elasticity, and also has good dyeing properties , The dyeing temperature is low, the color fastness and chlorine resistance are excellent, and it has exc...

Images