... alkalis resistance, Heat resistance As the first spandex producer in China, we started our spandex production since 1989. After more than 20 ... 2000D, and regular deniers in continuous production is 15D, 20D, 30D, 40D, 70D, 140D, 210D, 280D, 420D, 560D, 840D, 1120D. We ... type, dull type, semi-dull type, bright type, black type spandex yarn.NEWSTAR® T-635 SERIESClear type, bright type and black typeAcid ...