Modified polyester complex fiber and preparation method thereof

Abstract

The invention provides a modified polyester complex fiber. The complex fiber is prepared by compounding modified polyester and thermoplastic resin, wherein the modified polyester accounts for 10 to 90 percent of the total weight of the complex fiber, and the thermoplastic resin accounts for 10 to 90 percent of the total weight of the complex fiber; and the modified polyester structure comprises structural units shown in the specifications, wherein m1 is more than 1 and less than 160, m2 is more than 1 and less than 70, m3 is more than or equal to 0 and less than 20, and m4 is more than or equal to 0 and less than 20. The complex fiber can be dyed at normal temperature and normal pressure by using acid dye and disperse dye, and has the advantages of high color fastness, high elasticity and comfortable handfeel.

Description

technical field The invention relates to a polyester composite fiber, in particular to a modified polyester composite fiber and a preparation method thereof. Background technique Polyester fiber is widely used in various fields due to its excellent mechanical, physical and chemical properties. With the development of the polyester industry, our life has become rich and colorful. The development of many new polyester modified varieties has greatly enriched the diversity of the fabric market. In recent years, with the gradual acceleration of my country's economic development, and The integration of the world trend has made great progress in my country's polyester industry, and the chemical fiber market has followed the world trend. Each fiber has its advantages and disadvantages, and in life, what people pursue is not only the mechanical properties of the fabric, but also a variety of colors to increase its beauty. But for ordinary polyester, due to its structural characteri...

AI Technical Summary

Problems solved by technology

However, for ordinary polyester, due to its structural characteristics, it is difficult to achieve normal pressure dyeing, and high temperature and high pressure dyeing cannot be continuously produced industrially.

For example, Chinese patent application CN200810242976.4 discloses a new type of double-color side-by-side composite polyester fiber, which is a new type of double-color side-by-side composite fiber of ordinary semi-dull PBT and PET polyester. Its cross section is peanut-shaped, and the composite fiber can only Dyeing with disperse dyes under normal pressure, the use of dyes is limited, especially after blending with wool, etc., the dyeing process and the choice of dyes are limited

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