发明授权
- 专利标题： Production of asymmetrical microporous membranes by double irradiation and asymmetrical membranes
- 专利标题（中）： 通过双重照射和不对称膜生产不对称微孔膜
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申请号： US123574申请日： 1987-11-20
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公开(公告)号： US4832997A公开(公告)日： 1989-05-23
- 发明人: Emmanuel Balanzat , Claude Bieth
- 申请人： Emmanuel Balanzat , Claude Bieth
- 申请人地址： FRX Paris
- 专利权人： Commissariat a l'Energie Atomique & Centre National de la Recherche Scientifique
- 当前专利权人： Commissariat a l'Energie Atomique & Centre National de la Recherche Scientifique
- 当前专利权人地址： FRX Paris
- 优先权： FRX8616163 19861120
- 主分类号： C08J7/00
- IPC分类号： C08J7/00 ; B01D67/00 ; B01D69/02 ; B26F1/31 ; C08J9/00
摘要：
Process for the production of asymmetrical microporous membranes by double irradiation.A membrane (5) is exposed to two irradiations, whereof one has an inadequate energy level to pass through the same, whereas the other passes through membrane (5).The irradiations produce molecular defects, which are attacked or etched in preferred manner by certain chemical agents. Thus, two networks of pores are obtained, one network being of large diameter and of a non-issuing nature (26), the other being smaller (27, 28, 29) and which issue on to the two surfaces (31, 32) of membrane (5).Application to filtration and sterilization.
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