KevlaryoudaoicibaDictYouDict[Kevlar 词源字典]
registered trademark (DuPont) for a synthetic fiber developed there c. 1965.[Kevlar etymology, Kevlar origin, 英语词源]
Spandex (n.)youdaoicibaDictYouDict
synthetic fiber, 1959, American English, proprietary name, an arbitrary formation from expand + commercial suffix -ex.