发明授权
- 专利标题: Asymmetric porous polytetrafluoroethylene membrane and process for preparing the same
- 专利标题(中): 不对称多孔聚四氟乙烯膜及其制备方法
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申请号: US10281311申请日: 2002-10-28
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公开(公告)号: US06852223B2公开(公告)日: 2005-02-08
- 发明人: James Huang , William Chou , David Chou , Juin-Yih Lai , Kueir-Rarn Lee , Da-Ming Wang , Ruoh-Chyu Ruaan , Tian-Tsair Wu
- 申请人: James Huang , William Chou , David Chou , Juin-Yih Lai , Kueir-Rarn Lee , Da-Ming Wang , Ruoh-Chyu Ruaan , Tian-Tsair Wu
- 申请人地址: TW Taichung
- 专利权人: Yeu Ming Tai Chemical Industrial Co., Ltd.
- 当前专利权人: Yeu Ming Tai Chemical Industrial Co., Ltd.
- 当前专利权人地址: TW Taichung
- 代理机构: Armstrong, Kratz, Quintos, Hanson & Brooks, LLP
- 优先权: JP2001-334956 20011031
- 主分类号: B01D61/36
- IPC分类号: B01D61/36 ; B01D67/00 ; B01D69/02 ; B01D71/36 ; B29C55/02 ; B29C55/12 ; B29C55/18 ; B29C67/20 ; B29K27/18 ; B32B5/32 ; B32B27/30 ; C08J9/00 ; C08J9/36
摘要:
The present invention relates to an asymmetric porous polytetrafluoroethylene membrane comprising a dense skin layer and a continuously foamed porous layer, (1) the dense skin layer having a surface roughness Ra of 20 to 165 nm; (2) the dense skin layer having a contact angle for water of 120 to 135°; (3) the porous layer having a maximum pore diameter of 0.03 to 1.0 μm; and (4) the membrane having a total porosity of 20 to 70%. The asymmetric porous PTFE membrane has an ability to separate each liquid component from a liquid-liquid homogeneous mixture in addition to known properties such as water permeability resistance, gas permeability, sealing property and electric property, wherein change of these properties over time is small.
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