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公开(公告)号:US4842789A
公开(公告)日:1989-06-27
申请号:US210263
申请日:1988-06-23
CPC分类号: B29C55/005 , D01F6/60 , D01F6/62 , D02J1/22 , B29K2067/00 , B29K2077/00
摘要: Described and claimed is a process for obtaining high-modulus, high-strength linear polycondensates, e.g., polyamides, comprising the sequential steps drawing at room temperature, isothermal annealing at 180.degree.-270.degree. C., a second drawing at room temperature, and a second isothermal annealing at 120.degree.-260.degree. C., an orientation degree after the second drawing being 20-25.
摘要翻译: 描述和要求保护的是获得高模量,高强度线性缩聚物(例如聚酰胺)的方法,包括在室温下抽取的顺序步骤,在180℃-270℃进行等温退火,在室温下进行第二次拉伸,以及 在120°-260℃进行第二次等温退火,第二次拉伸后的取向度为20-25℃。