A kind of normal pressure cationic dyeable polyester for wig and its fiber preparation method

Abstract

The invention relates to an atmospheric pressure cation polyster for dying hairpiece, and a fiber preparation method thereof. The method does not take poly alkylene glycol as a polymerizable monomer, and comprises the following steps: blending and stirring terephthalic acid and plycol according to the mole ratio of (1:1.2) to (1:1.5), adding 0.075 percent to 1.2 percent of catalyst, 0.05 percent to 1 percent of heat stabilizer based on the weight ratio of the terephthalic acid, controlling the esterification rate to be 88-92 percent, adding 1.0 percent to 3.5 percent of terephthalic acid, according to 1.0-3.5 percent of mole ratio of the content of the terephthalic acid, adding isophthalic acid diethylene glycol ester-5-sulphonic acid sodium solution to obtain esterification, conducting esterification reaction at the temperature of 220 to 260 DEG C to obtain isophthalic acid glycol ester melt, adding alcohol chain extender of which weight is 0.5-2.5 percent of the terephthalic acid in a melt, conducting condensation polymerization reaction at the temperature of 200 to 250 DEG C and the pressure between atmospheric pressure and 500 Pa for 1 to 2 hours, and finally conducting final polycondensation reaction under the pressure of 60 Pa for 0.5 to 1 hour to obtain a final product. According to the polyster provided by the invention, dying can be conducted under normal temperature and atmospheric pressure, and the dye effect is good.

Description

[technical field] [0001] The invention relates to a compound containing polyethylene phthalate, in particular to a normal-pressure cationic dyeable polyester for wigs and a preparation method thereof. [Background technique] [0002] As we all know, polyester fiber has become the fastest growing and most widely used variety among chemical fibers due to its excellent comprehensive performance and cost advantages, and it has excellent heat resistance and strength due to its high melting point and high modulus. It has its advantages in the production of hair products, but due to the tight aggregation of polyester molecular chains, high crystallinity and orientation, and low polarity, there is no gap between polyester long chain molecules that can properly accommodate dye molecules, so Dye particles are not easy to penetrate into the fiber, its dyeing performance is poor, and there are few types of dyes that can be used. Generally, polyester fibers can only be dyed with disperse ...

AI Technical Summary

Problems solved by technology

[0003] Among the cationic dyeable polyester chips widely used in the market, most of the modified polyesters are copolymerized by adding ethylene glycol-5-sulfonate isophthalate (SIPE), which can achieve cationic dyeing, but still It needs to be dyed under high temperature and high pressure. For this reason, many technologies use flexible components such as polyethylene glycol on the basis of adding SIPE, but the initial modulus of the fiber is reduced, and the product application is limited.

Japanese Patent Laid-Open No. 59-30912 discloses a kind of PET that adds a certain amount of SIPE and (or) alcohol components as the skin layer, polyamide and polyester as the core layer, and adopts the method of concentric compounding to obtain an easy-to-dye And high-strength fibers, but because the core layer is conventional polyester or polyamide, when it is made into short fibers, especially for artificial fur, etc., the cross-section is prone to color difference

For this reason, Chinese patent CN101613894B discloses a preparation method of cationic dye-dyeable polyester composite fiber. The method adopts the method of skin-core composite, and the cross-section of the fiber made has no color difference, but the skin-core composite process is complicated, and there is a skin-core layer. Combination problem

[0004] In addition, conventional cationic dyeable copolyester chips are bright chips, and the woven fibers and fabrics have uncomfortable brightness and reflection. When used as wig raw materials, they cannot meet the actual use requirements.