High transparency bright spandex yarn and its preparation method

Abstract

The present invention discloses one kind of high transparency bright polyurethane fiber and its production process. The bright polyurethane fiber includes the components of polyether dihydric alcohol, normal butyl alcohol, mixed diamine, yellowing inhibitor, lubricant, UV absorber, antioxidant, monoamine, acid matter and dimethyl amide. The production process includes polymerization to obtain single molecular prepolymer, high molecular weight polymer and spinning liquid, spinning and post-treatment. The bright polyurethane fiber has high elasticity, high transparency, excellent dyeing performance, high antiageing performance, good appearance and stable performance, and may be used in high grade fabric and high grade clothing.

Description

1. Technical field [0001] The invention relates to a chemical fiber, in particular to a spandex yarn and a preparation method thereof. 2. Background technology [0002] Spandex is a polyurethane polymer synthesized for the first time by German Bayer Company in 1937. The performance of early spandex products is similar to that of nylon. In 1959, DuPont Company of the United States first realized the industrial production of dry-spun spandex yarn. With the development of spandex-covered yarn and core-spun yarn technology, the application range of spandex has expanded rapidly. Especially in the past ten years, the application of spandex yarn in high-end clothing fabrics has greatly increased the demand for spandex. At present, more than a dozen countries or regions in the world have realized the industrial production of spandex. The development of spandex yarn in our country is relatively late. In the late 1980s and early 1990s, Yantai and Lianyungang successively introduced t...

AI Technical Summary

Problems solved by technology

However, due to certain limitations in physical and chemical properties such as elasticity, dyeing, and anti-aging, the matte spandex yarn has been far from meeting the requirements of various high-grade fabrics and high-end clothing fabrics.

[0003] In the existing formula and manufacturing process of matte spandex yarn, due to the nature of some additives, there are certain restrictions on the anti-aging and dyeing performance of the product, and the produced spandex yarn lacks transparency; the addition amount and chain of reaction control agent The speed of adding the growth agent seriously affects the uniformity and transparency of the spandex yarn

The imperfection of the above process and the imprecise control of the production process have led to considerable defects in the physical and chemical properties of the matte yarn.

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