PBT-PET (Polybutylece Terephthalate-Polyethylene Terephthalate) composite elastic fibers and preparation method of PBT-PET composite elastic fibers

Abstract

The invention discloses PBT-PET (Polybutylece Terephthalate-Polyethylene Terephthalate) composite elastic fibers and a preparation method of the PBT-PET composite elastic fibers. A polybutylene terephthalate and polyethylene terephthalate composite material is fused and then is compounded and spun into a spring shape, and a cross section thereof is in a round structure, wherein a PET component is distributed at the outer side of a spiral and a PBT component is distributed at the inner side of the spiral; the content ratio of the PET to the PBT is (3 to 7):(7 to 3). The PBT-PET composite elastic fibers have the following beneficial effects that (1) the PBT is used for replacing original PTT (Polytrimethylene Terephthalate) and PET composite spinning and a monofilament breaking problem of T-400 fibers in a warp-wise spinning process is solved; (2) the fibers have the advantages of high rebound resilience, good stability, soft fabric, good drapability, flat cloth surface, strong crease resistance, moisture adsorption and quick drying, smooth hand feeling, stable size, no need of ironing and easiness of being cared; (3) the PBT-PET composite elastic fibers can be used for independently and purely weaving and also can be interwoven with cotton, sticky fibers, dacron, chinlon and the like. Textiles of the PBT-PET composite elastic fibers can be widely applied to fabrics of trousers and skirts, sports wear, stockings, jean fabrics, underwear, top-grade woman dresses and the like.

Description

technical field [0001] The invention relates to an elastic fiber, specifically a PBT-PET (polybutylene terephthalate / polyethylene terephthalate composite material) novel elastic fiber, which belongs to the technical field of chemical fiber textiles. Background technique [0002] With the continuous development of the potential properties of chemical fibers, textile users have increasingly high requirements for the use of fibers, and the market demand for elastic fibers is growing rapidly. But the most important elastic fiber T-400 on the market at present, T-400 is the commodity name of a kind of new elastic fiber, this is a kind of elastic polyester fiber composed of many different polymers, also known as EasyFitLycra. Its characteristics are: 1. Bi-component fiber made of two different polyester fibers. 2. Automatic curling, the shrinkage rate of the two components is different. 3. Although the curl is formed after unwinding from the bobbin, it has good elasticity. Howev...

AI Technical Summary

Problems solved by technology

However, when it is used for warp weaving, it is very easy to break the monofilament, resulting in wool or broken yarn, causing losses to textile users, thus greatly limiting the application range and development prospects of T-400 fiber

Moreover, due to the instability of the PTT composition, the production status of T-400 spinning is generally not stable, the phenomenon of floating yarn is serious, and the processing is difficult.

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