DuPont Leica:

LYCRA is a kind of artificial Elastic fiber, which is the best elastic fabric. It can be lengthened 4 to 7 times freely, and quickly recover the original length after the release of external force. It cannot be used alone and can be interwoven with any other artificial or natural fibers. It does not change the appearance of the fabric and is an invisible fiber that can greatly improve its performance.

Lycra has outstanding stretchability. For knitwear, its multidirectional extension is determined by the fabric itself, and what Lycra brings is only the elasticity of stretching and recovery. Woven fabrics have ductility only in the direction of weaving into the lycra, such as warp knitting (linear) or weft knitting (horizontal). Pants benefit from the elasticity in the warp direction, while the bidirectional elastic woven fabric with Lycra provides great comfort and freedom of movement in both directions.

Nylon Fabric:

A fabric obtained by blending or interweaving nylon filaments or short fibers with other fibers, which combines the characteristics and strengths of each fiber. Ru Visco/Jinhua Dacron is made by blending 15% nylon and 85% viscose into a yarn. It has a warp density twice that of weft density, a thick texture, and is tough and durable. The disadvantages are poor elasticity, easy wrinkling, decreased wet strength, and easy sagging during wear. In addition, there are also varieties of commonly used fabrics such as viscose/brocade/woolen tweed, etc. The most common nylon products in the market are nylon 6 and nylon 66. Nylon 6: full name is poly Caprolactam fiber, which is polymerized from Caprolactam. Nylon 66: the full name is polyhexamethylene Hexamethylenediamine fiber, which is polymerized from Adipic acid and Hexamethylenediamine. The common characteristics of nylon 6 and nylon 66 are poor light resistance, decreased intensity and yellowing color under prolonged sunlight and ultraviolet light exposure; Its heat resistance is also not good enough. At 150 ℃, it turns yellow after 5 hours, with a significant decrease in strength and elongation, and an increase in shrinkage. Nylon 6 and 66 filaments have good low-temperature resistance, and their resilience changes little below -70 ℃. Its DC conductivity is very low, and it is easy to generate static electricity due to friction during processing. Its conductivity increases with the increase of moisture absorption, and increases according to the Exponential function law with the increase of humidity. Nylon 6 and 66 filaments have strong microbial resistance, second only to chloroprene in terms of microbial resistance in muddy water or alkali. In terms of chemical properties, nylon 6 and 66 filaments have alkali resistance and resistance to reducing agents, but their performance in acid resistance and oxidation resistance is poor.