Polyester-polyamide copolymer and synthetic preparation method thereof

Abstract

The invention relates to a polyester-polyamide copolymer and a synthetic preparation method thereof. The polyester-polyamide copolymer is composed of polyester and nylon 6 with relative viscosity of 1.5-2.2, intrinsic viscosity thereof is 0.80-0.90dL / g, tensile strength thereof is 40-80MPa, elongation at break thereof is 10-80%, content of a terminal carboxyl group thereof is less than 18mol / t and diglycol content thereof is less than 1.0%. In the invention, the nylon 6 with the relative viscosity of 1.5-2.2 is added during the polyester polymerization process, so that a polyester prepolymer performs copolymerization with the nylon 6 to obtain a polyester copolymer with an acid dyeable amide group which has affinity to acid dyes, thus further processing and preparing polyester chips and fibers, which can be subject to acid dyeing; and the method thoroughly solves the problem of poor compatibility between the nylon and the polyester, and overcomes the problems of low spinning strength, poor dyeing uniformity and easy occurrence of color difference of the copolymer obtained in the prior art.

Description

technical field

[0001] The invention relates to a polyester-polyamide copolymer and a synthesis preparation method thereof. Background technique

[0002] In recent years, my country's chemical fiber production has developed rapidly, and its production capacity has accounted for 1 / 3 of the world's chemical fiber production, of which polyester production accounts for 1 / 2 of the world's production, ranking first in the world, and the production capacity is still developing at a high speed. Center for the development of polyester polyester. Wherein polyester staple fiber has been used more and more for blending with wool etc. since it appeared on the market, for preparing wool polyester worsted fabrics. With the increase of polyester staple fiber in the preparation of fine-woven fabrics such as wool and polyester, the amount of this aspect accounts for about 40% of the total output of polyester staple fiber. Therefore, it is of great practical significance to research and devel...

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