Kevlar-Covered Bulletproof Backpack to Hit Shelves
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KEVLAR 防撕裂測試 有許多高等級的戶外用品或是軍事用品，才會使用到Kevlar這個材質做為主要材質，但因為這個材質成本太高，所以很少人會拿來製成產品! Kevlar，或譯凱芙拉、凱夫勒、凱庫勒、功夫龍等 是美國杜邦公司於1965年推出的一種芳香聚醯胺類合成纖維，發明者為波蘭裔美國化學家史蒂芬妮·克沃勒克。 Kevlar極佳的抗拉性能，其強度為同等質量鋼鐵的五倍! 因此在70年代初被用於替代賽車輪胎中的部分鋼材。 此外，Kevlar不會像鋼鐵般與氧氣和水產生鏽蝕。 廣泛用於船體、飛機、自行車輪胎、軍用頭盔、防彈背心等。 克維拉化學名為「聚對苯二甲醯對苯二胺」，其化學式的重複單位為 -[-CO-C6H4-CONH-C6H4-NH-] （間位結構為另一項商標名為Nomex的產品，防火纖維）
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