Spandex blended fiber

Abstract

The invention discloses a spandex blended fiber. The fiber is formed by blending, by mass, 85% of 20S cotton fiber and 15% of 40D modified spandex fiber, wherein the modified spandex fiber comprises,by weight, 8-12 parts of 4,4'-methylenediphenyl diisocyanate, 40-45 parts of polytetramethylene ether glycol, 0.8-1 part of a chain extender, 0.1 part of a stabilizer, 1.5-2 parts of diethylamine serving as a terminator, 0.1-0.2 part of quaternary ammonium salt and 3-5 parts of a modified additive. The blended fiber is good in dyeing performance on the premise of good air permeability and mechanical strength, and meanwhile, the antibacterial property is good.

Description

technical field [0001] The invention relates to the technical field of spinning yarns, in particular to a cotton / modified spandex blended fiber. Background technique [0002] Spandex is a kind of elastic fiber, its scientific name is Polyurethane fiber (Polyurethane), abbreviated as (PU). It is called "spandex" in mainland China. It is highly elastic and can be stretched 6 to 7 times, but it can quickly return to its original state as the tension disappears. Its molecular structure is a chain-like, soft and extensible fiber. Polyurethane, which enhances its properties by linking together hard segments. [0003] Underwear, as a kind of close-fitting clothing, needs to ensure its close fit and air permeability. The yarn of its woven fabric needs to have certain mechanical strength and good air permeability; at the same time, underwear, as close-fitting clothing, often needs to be dyed, and the conventional single The color fastness of polyurethane or cotton fibers is relativ...

AI Technical Summary

Problems solved by technology

However, it did not make corresponding improvements to the fiber itself, but simply relied on the characteristics of the combination of the two fibers, and did not improve its dyeing performance.

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