Introduction To Spandex

Spandex is short for polyurethane fiber, which is an elastic fiber. Spandex is generally composed of multiple filament, generally 10D/ root, currently has 15D/ root, or even 20D/ root, the less the theoretical number of roots, the better the evenness of the strip, because of the less chance of overlapping form, dry spinning production solution DMAC is harmful to the human liver, generally 10D/ root contains control 0.5mg/kg, For example, 15D/ root contains 0.7mg/kg, which exceeds the standard. In the production of Spandex, special attention should be paid to the winding tension, the number of counts on the cylinder, the breaking strength, the breaking elongation, the formability, the amount of oil adhesion, the elastic recovery rate, etc. These problems directly affect the knitting, especially the production of single-sided fabric.