Alkaline easily soluble copolyester polymer for polyester composite fiber and its manufacturing method using terephthalic acid process, and polyester composite fiber therefrom.

摘要

The invention regular polyester alkaline loss rate relates to a polyester conjugate fiber with alkali utilization is at least 50 times the copolyester polymers and methods for their manufacture and this. Details in that the polymer of bis-hydroxy ethyl isophthalate containing a metal sulfonate salt prepared using a batch polymerization method of the terephthalic acid as a raw material, a dimethyl isophthalate component containing a metal sulfonate salt is reacted with ethylene glycol in the presented 1~6 mole% of diethoxy seed component, and transferring the isophthalic acid component in the polycondensation reaction tank after the esterification reaction in the esterification reaction rate of 96% or more to be added is 0.01 to 5% by weight of the polymer components within diethoxy seed by condensation of antimony trioxide in 100~500 ppm compared to 1,000 to 20,000 molecular weight polymer with a catalyst and a polyalkylene ether glycol of 3 to 15% in contrast to the oligomer and the filter pack exchange period during spinning to be subjected to polymerization by weight polymer good melt of alkali utilization temperature is 205~240 ℃ copolyester and the production method thereof, and And it relates to a copolyether polyester composite fibers with ester polymers.; Composite fiber alkali availability copolyester polymer prepared by the present invention is excellent, the replacement cycle of the oligomer filter according to the unreacted during the polymerization not only the polymerization fairness preferably prepared by a composite spinning therefrom conventional polyester fiber said Genie a similar intensity showing excellent alkali eluting facilitates the production of the microfiber.