Preparation method of low-strength low-elongation terylene filament

Abstract

The invention relates to a modified polyester raw material of a low-strength low-elongation terylene filament, which comprises the raw material components as follows: terephthalic acid, ethylene glycol, inorganic sub-micron particles, a catalyst and a flatting agent, wherein the molar ratio of ethylene glycol to terephthalic acid is (1.3-1.8) : 1; the inorganic sub-micron particles are CaCO3 or CaSO4, and the mass ratio of the inorganic sub-micron particles to terephthalic acid is 0.5-2%; the catalyst is ethylene glycol antimony or antimony trioxide, and the mass ratio of the catalyst to terephthalic acid is 0.03-0.06%; and the flatting agent is TiO2, and the mass ratio of the flatting agent to terephthalic acid is 0.1-1.0%. The preparation method comprises the steps as follows: performing melt spinning on the modified polyester, drawing, cooling, and winding to obtain the low-strength low-elongation terylene filament. The low-strength low-elongation terylene filament has the advantages that the hygroscopicity, bulkiness and air permeability of the product are improved; the situation that fibers in the tearable non-woven medical gauze are arranged according to a certain direction is improved, and the service life is prolonged; the heat resistance and the heat stability are improved as compared with the those of the non-woven fabric and other tearable gauze and hygienic cloth; and the light fastness is good, the gloss retention, the color retention and the yellowing resistance and the like can be improved, and the use field is enlarged.

Description

【Technical field】 [0001] The invention relates to the technical field of polyester filaments, in particular to a preparation method of low-strength and low-elongation polyester filaments. 【Background technique】 [0002] Viscose fiber has experienced hundreds of years of development and has become an important variety of textile fibers. However, due to the unbalanced development of enterprises in terms of technology and products, a large amount of caustic soda is used in the production process, so it is very important to solve environmental protection problems in viscose fiber production. Moreover, for a long time domestic viscose fiber is dominated by cotton pulp, the amount of wood pulp and bamboo pulp is less, and the domestic pulp production is less, which cannot meet the needs of viscose enterprises, and the demand for domestic cotton linters is large. Supply is tight. [0003] With the steady development of my country's economy and the increasing trend of globalization...

AI Technical Summary

Problems solved by technology

[0004] The invention of Chinese Patent Publication No. CN1667172 relates to a tearable non-woven fabric and its production method. Cloth, first, the fibers in the non-woven fabric are arranged in a certain direction, which is easy to split and has a short life; second, it cannot be cleaned like other fabrics

Chinese patent publication number is that the invention of CN1666725 relates to tearable non-woven adhesive elastic bandage, which is made up of tearable non-woven fabric and adhesive. Insufficient heat resistance and thermal stability; second, it has not been modified in terms of light resistance, and the application field has been reduced; third, conventional non-woven adhesive adhesives, and imitation viscose low-strength polyester filament fibers Compared with the special-shaped cross-section, the fabric has insufficient hygroscopicity and air permeability