发明授权
- 专利标题: Process for producing aromatic polyimide filaments
- 专利标题(中): 芳香族聚酰亚胺长丝的制造方法
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申请号: US261979申请日: 1981-05-08
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公开(公告)号: US4370290A公开(公告)日: 1983-01-25
- 发明人: Hiroshi Makino , Yoshihiro Kusuki , Takashi Harada , Hiroshi Shimazaki
- 申请人: Hiroshi Makino , Yoshihiro Kusuki , Takashi Harada , Hiroshi Shimazaki
- 申请人地址: JPX
- 专利权人: Ube Industries, Ltd.
- 当前专利权人: Ube Industries, Ltd.
- 当前专利权人地址: JPX
- 优先权: JPX55-60516 19800509
- 主分类号: C08G73/10
- IPC分类号: C08G73/10 ; C08L79/08 ; D01F6/74 ; D01F6/00
摘要:
Aromatic polyimide fibers having an enhanced mechanical strength are produced by a process comprising the steps of: preparing a spinning dope solution of at least one aromatic polyimide having 90 molar % or more of a recurring unit of the formula (I): ##STR1## wherein R is a divalent aromatic radical, in a phenolic solvent; converting the dope solution into at least one filamentary stream thereof; solidifying the filamentary dope solution stream by removing the solvent therefrom to provide at least one undrawn filament, and; drawing the undrawn filament at a temperature of 20.degree. to 600.degree. C. at a draw ratio of 1.5 to 5.0.