As a kind of spandex elastic fiber, a polymeal polymethyl ester composed of a flexible chain segment and a rigid chain segment. It was successfully studied by Bayer in Germany in 1937. In 1959, it was produced by DuPont. Because it has many advantages and good quality, it is recognized by the peers, so as long as the clothing of LYCRA will be used to hang a triangular tag, this tag also becomes a high -quality symbol. Although Lycra fiber is a synthetic elastic fiber, it is also known as spandex in the United States, and spandex and elastic fiber are the common name of the same substance, but only Lycra produces a real Lycra® fiber.
1) Fiber's fineness range
LYCRA's fibrous fineness range is 22 ~ 4778 DTEX, and the thinnest rubber wire is 156 DTEX. Because LYCRA is more uniform than other elastic fibers in the process of weaving, the fabric containing LYCRA has a good flatness and soft feel.
2) higher strength and elongation
LYCRA's strength is 2 to 4 times that of rubber wires. Since LYCRA has a greater elasticity than rubber wire under the same extension, the fabric containing LYCRA has a higher tightness.
3) High temperature resistance
Elastic fabrics are generally mixed with a small amount of elastic fiber with other fibers. The thermal definition and dyeing of conventional synthetic fibers must be treated at high temperature, so the blended fiber must also be able to withstand high temperature thermal treatment. LYCRArtetting temperature can reach 195 ° C, while the highest thermal fiber temperature of other brands is 180 ~ 185 ° C. Therefore, under the same high temperature conditions, the stretching rate and rebate of LYCRA fabrics are more advantageous than other elastic fabrics.
4) Low washing rate and growth rate
The washing rate and growth rate of fabrics are the main factor affecting the size stability and anti -wrinkleability of the garment, and it is also an important indicator of the deformation of fabrics and garments. Washing rate and growth rate are low, which indicates that the clothing has good sheeting, and the fabric is not easy to deform and wrinkle.
5) Good stretching and rejuvenation
Proper response and maintenance gives the elastic fabric comfort, morphological maintenance, preparation, and formability. Lycra can extend to the length of 7 times longer than the length of the original cracking; when the retractability is also very good, when the extension is extended by 50%, the recovery rate is greater than 99%; when the extension is 200%, the retractable rate is 97%; even if the extension is extended; even if the extension is extended When the length of 500%, its shrinkage rate is above 90%. The size of the retractable rate is related to the thickness of the yarn. The thicker the yarn, the greater the rebound force.
6) Can dye
LYCRA can dye dyes such as acidic, metal complexation, activity, and decentralization, while rubber wire is not easy to dye.
7) Anti -aging and not easy to yellow
Synchronous fabrics or processing clothing containing spandex, over time, repeatedly use or washing will produce yellowing, and the elastic rough containing LYCRA is placed for three months. 10%~ 20%better than ordinary products, and at the same time, it has better anti -aging.
8) Good abrasion resistance
The extension range is 50%to 300%, and 200 fatigue tests are performed per minute. It can resist more than 1 million times and continuously cracks, while rubber is only 240,000 times.
9) Good light resistance and chlorine resistance
LYCRA took 40 h in the exposure tolerance tester, and the strong reduction was reduced by about 20%. The rubber wire is also irradiated, resulting in aging and loss of strength.
LYCRA has a certain resistance to general chemicals, but it is relatively sensitive to chlorine (such as NACLO bleach), causing fibrous yellow damage to lose elasticity and extension, which is one of its main disadvantages. The bleach containing oxygen is relatively stable.