发明授权
- 专利标题： Fluorocarbon membranes and process for making fluorocarbon membranes
- 专利标题（中）： 氟碳膜和氟碳膜制造方法
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申请号： US190285申请日： 1988-05-04
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公开(公告)号： US4902456A公开(公告)日： 1990-02-20
- 发明人: Larry Y. Yen , George Lopatin
- 申请人： Larry Y. Yen , George Lopatin
- 申请人地址： MA Bedford
- 专利权人： Millipore Corporation
- 当前专利权人： Millipore Corporation
- 当前专利权人地址： MA Bedford
- 主分类号： B01D67/00
- IPC分类号： B01D67/00 ; B01D71/36 ; C08J9/28 ; C08L27/12 ; D01D5/24
摘要：
Microporous poly (tetrafluoroethylene-co-perfluoro (alkyl vinyl ether)) (PFA) or poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) membrane or hollow fibers are formed from a melt blend of 10 to 35 weight percent of PFA or FEP and a chlorotrifluoroethylene oligomer solvent. The melt blend is shaped and cooled to effect phase separation of the PFA or FEP from the blend. The solvent is removed from the PFA or FEP by extraction and the porous PFA or FEP is dried under restraint to prevent shrinkage.
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