发明名称 |
Methods for the preparation of porous fibers and membranes |
摘要 |
The invention concerns porous fibers and membranes, methods for their preparation and for their use. The fibers are characterized by a smooth porous surface and an apparent density of between about 10 and 90% of the true density of the polymeric starting material employed. The process involves the formation of a homogeneous mixture of at least two components, one of which is a meltable polymer and another liquid inert with respect to the polymer. The mixture formed must be of a binary type, in which there is a temperature range of complete miscibility and a range in which there is a miscibility gap. The mixture is extruded at a temperature above the separation temperature into a bath containing at least some of the inert liquid which is at a temperature below the separation temperature. Upon introduction of the mixture into the bath, the fiber structure of the product is fixed.
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申请公布号 |
US4564488(A) |
申请公布日期 |
1986.01.14 |
申请号 |
US19830456758 |
申请日期 |
1983.01.10 |
申请人 |
AKZO NV |
发明人 |
GERLACH, KLAUS;KESSLER, ERICH |
分类号 |
B01D67/00;B01D69/02;B01D69/08;B29C67/20;C08J9/28;D01D5/24;D01D5/247;(IPC1-7):B29C67/20;B29C47/00;C08J9/26 |
主分类号 |
B01D67/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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