Manufacturing method of polyester fiber for industry

Abstract

The invention relates to a manufacturing method of polyester fiber for industry. The manufacturing method includes following steps: 1), mixing organic calcium carbonate crystal whisker, organic wollastonite nano raphioid fiber, organic barium sulfate nanopowder, theylene glycol, propylene glycol, butylenes glycol, p-hydroxybenzoic acid and sodium germinate to prepare a high-strength high-modulus composite alcohol solution; 2), mixing organic magnesium hydroxide crystal whisker, mica powder, polyethylene glycol, propylene glycol, high-temperature antioxidant 1098, ethylene glycol antimony and protonizing agent phosphoric acid to prepare a high-strength high-modulus composite promoter; 3), subjecting the high-strength high-modulus composite alcohol solution, the high-strength high-modulus composite promoter, purified terephthalic acid and ethylene glycol to co-condensation polymerization to prepare high-strength high-modulus polyester, and spinning to obtain the polyester fiber. By the manufacturing method, flexibility and mobility of molecular chains are improved, and the polyester fiber is endowed with high crystallinity and high processing constancy; the polyester fiber has high strength and modulus, excellent impact resistance and quite good market prospect.

Description

technical field [0001] The invention relates to a method for manufacturing industrial polyester fibers, belonging to the technical field of textile fiber manufacturing. Background technique [0002] Polyethylene terephthalate is a polymer compound, which is made by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG), and is abbreviated as PET. Because of its high melting temperature (Tm) and glass transition temperature (Tg), and its excellent comprehensive properties, it is widely used in synthetic fibers, bottle flakes, films and other fields. Due to the steric hindrance effect of the benzene ring of PET resin, the crystallization rate is very slow and the glass transition temperature is high. Especially in the post-processing molding process, the molding cycle is long and the crystallization performance is poor, resulting in a large molding shrinkage rate and poor dimensional stability. It is difficult to endow materials with high-strength and high-modul...

AI Technical Summary

Problems solved by technology

Due to the steric hindrance effect of the benzene ring of PET resin, the crystallization rate is very slow and the glass transition temperature is high. Especially in the post-processing molding process, the molding cycle is long and the crystallization performance is poor, resulting in a large molding shrinkage rate and poor dimensional stability. It is difficult to endow materials with high-strength and high-modulus characteristics, which limits the application in the field of high-end materials. Therefore, how to improve the strength and modulus of polyester fibers and improve their mechanical properties has always been a hot spot for researchers.

[0003] At present, after the polyester fiber is stretched and oriented to a certain extent, the orientation and strength of the fiber will increase correspondingly, but industrial yarns such as bags and curtains have higher requirements on fiber strength and modulus. Components are used to improve the crystallinity of PET resin, so that the fiber has the characteristics of high strength and high modulus. The former technology is relatively mature, and many products are already on sale in the market. The latter mainly stays at the stage of theoretical and laboratory research. Although there are a small number of products on the market, the modulus and impact resistance of the products are relatively low, and there is a big gap with foreign products. Therefore, in order to meet the application requirements of high-end fields, the development of an industrial polyester fiber has a good development prospect