Six kinds of commonly used elastic fibers, do you know how many?

Elastane refers to a tow having high extensibility and high elasticity. The most classic definition is given by the American Society for Testing and Materials (ASTM): "At room temperature, a material is repeatedly stretched to at least twice its original length, and after the tension is released, it can quickly return to its original length". Fibers, and for polyurethane materials, refer to fibers that, after being stretched to 3 times their original length, can quickly recover their original length after the tension is released. In addition, there are other definitions, depending on the country and region.

Elastane refers to a tow having high extensibility and high elasticity. The most classic definition is given by the American Society for Testing and Materials (ASTM): "At room temperature, a material is repeatedly stretched to at least twice its original length, and after the tension is released, it can quickly return to its original length". Fibers, and for polyurethane materials, refer to fibers that, after being stretched to 3 times their original length, can quickly recover their original length after the tension is released. In addition, there are other definitions, depending on the country and region.

Among many functional varieties, elastic fiber, as a "sunrise industry", plays an irreplaceable role in clothing comfort and fluffy warmth retention. Because it can give the human body a good sense of contact, it is used in the textile industry in China and the world. Widely used. It occupies a stable position in textiles, and endowing textile fabrics with certain elasticity has become an inevitable development trend of clothing textiles.

1. Diene elastic fiber (rubber yarn)

Diene elastic fibers are commonly referred to as rubber strands or elastic strands, and the elongation is typically between 100 and 300 percent. The main chemical composition is vulcanized polyisoprene, which has good chemical and physical properties such as high temperature resistance, acid and alkali resistance, and wear resistance. It is widely used in the knitting industry such as socks and ribbed cuffs. Rubber yarn is an early use of elastic fiber. Since it is mainly made of roving, its use in woven fabrics is very limited.

2. Polyurethane fiber (spandex)

Polyurethane elastic fiber refers to the fiber made of block copolymer with polyurethane as the main component, referred to as spandex in China. The name is Neolon, the German name is Dorlastan. Its elasticity comes from the block copolymer network structure, where its molecular structure is composed of so-called "soft" and "hard" segments. With different block copolymers and different spinning processes, the fibers have different elasticity and dyeing and finishing properties after forming different "segment" network structures.