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What are the basic characteristics of spandex?

Update:15-03-2021
Summary:Spandex Fabric is the abbreviation of polyurethane fiber, which is a kind of elastic fiber. Spandex is generally compose...

Spandex Fabric is the abbreviation of polyurethane fiber, which is a kind of elastic fiber. Spandex is generally composed of multiple filaments, usually 10D/root. Currently, there are 15D/root, or even 20D/root. The less the number of theoretical roots, the better the evenness of the evenness, and the less chance of overlapping forms. DMAC, the production solution of spinning, is harmful to the liver of the human body. Generally, 10D/root contains 0.5mg/kg, such as 15D/root contains 0.7mg/kg, which exceeds the standard. When producing Spandex, special attention must be paid to the winding tension, the number of counts on the tube, the breaking strength, the breaking elongation, the degree of forming, the amount of oil adhesion, the elastic recovery rate, etc., which directly affect the knitting, especially the knitting production Pay more attention to single-sided fabrics.
Spandex translated as "Spandex", is a kind of elastic fiber, the scientific name is polyurethane fiber (Polyurethane), abbreviated (PU). It is called "spandex" in mainland China. It is highly elastic and can be elongated 6 to 7 times, but it can quickly return to its original state with the loss of tension. Its molecular structure is a chain-like, soft and extensible Polyurethane enhances its properties by linking with hard segments. Elastic fibers are divided into two categories: one is polyester chain; the other is polyether chain. Polyester elastic fiber has strong anti-oxidation and oil resistance; polyether elastic fiber has good anti-mildew and detergent resistance.

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