Characteristics of spandex fabrics Composite fabric information

Spandex fabric (Spandexfabric) 1. Features Spandex is a polyurethane fiber. Because of its excellent elasticity, it is also called elastic fiber and has been widely used in clothing fabrics. The main characteristics of spandex fabric are: ⑴ Spandex has very high elasticity. Generally, 100% polyurethane is not used in products. Instead, 5 to 30% is mixed in the fabric. The resulting spandex fabrics have a comfortable elasticity of 15% to 45%. ⑵Spandex fabric is often made of composite yarn, that is, spandex is used as the core and other fibers (such as nylon, polyester, etc.) are used as the skin layer to make core-spun elastic fabric. It has good adaptability to the body and is very suitable for tights. No sense of oppression. ⑶The appearance style and wearing performance of spandex elastic fabric are close to similar products covered with outer fiber fabric. 2. Variety: Spandex fabric is mainly used in the manufacture of tights, sportswear, body belts and shoe soles. Its varieties can be divided into warp stretch fabrics, weft stretch fabrics and warp and weft two-way stretch fabrics according to the needs of use. 3. Purpose 1. The grade of fabrics and clothing mainly depends on the textile and garment-making technology, and has little to do with the raw fiber. For example, some nylon clothing costs more than ten yuan, while others cost several thousand yuan. There is no distinction between high and low grades of raw materials. 2. Underwear fabrics generally do not use nylon or spandex alone, but are often blended and interwoven with other fibers. Especially spandex, the general content is about 5%. 4. The biggest advantage: The biggest advantage of spandex fabric is that it has good elasticity, can be stretched 5-8 times, and does not age. Spandex cannot be woven alone and is generally woven with other raw materials. The proportion of spandex is between 3-10%. , the proportion of spandex in swimwear fabric reaches 20%. Spandex fiber is a synthetic fiber with high elongation at break (more than 400%), low modulus and high elastic recovery rate. Chinese trade name for multi-segmented polyurethane fiber. Also known as elastic fiber. Spandex has high elongation (500% ~ 700%), low elastic modulus (200% elongation, 0.04 ~ 0.12 g/den) and high elastic recovery rate (200% elongation, 95% ~ 99%). In addition to its greater strength, other physical and mechanical properties are very similar to natural latex silk. It is more resistant to chemical degradation than latex silk, has moderate thermal stability, and has a softening temperature above about 200°C. Most dyes and finishes used for synthetic and natural fibers are also suitable for dyeing and finishing spandex. Spandex is resistant to sweat, sea water, various dry cleaning agents and most sunscreen oils. It can also fade with long-term exposure to sunlight or chlorine bleach, but the degree of fading varies greatly depending on the type of spandex. Lycra is a trade name of spandex. DuPont has registered a trade name for their spandex called Lycra. In other words, only the spandex produced by DuPont is called Lycra.
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