发明名称 |
Diffusion film, electrode having the diffusion film, and process for producing diffusion film |
摘要 |
A diffusion membrane contains uncalcined polytetrafluoroethylene (PTFE), calcined PTFE and a conductive substance. An electrode has the diffusion layer (membrane) and a catalyst layer disposed thereon. A process for producing diffusion membranes comprises dispersing uncalcined PTFE, calcined PTFE and a conductive substance in a dispersion medium, removing the dispersion medium, adding a liquid lubricant followed by kneading, compressing the resultant kneaded product (preferably a rod-shaped preform) to expand the same into a membrane, and removing the liquid lubricant. The diffusion membrane preferably contains 1 to 30 wt % of the uncalcined PTFE and 5 to 30 wt % of the calcined PTFE. The conductive substance is desirably a combination of graphite and carbon black. The diffusion membrane is free from local variation in properties, has suitable mass producibility and can be produced inexpensively. |
申请公布号 |
US7326488(B2) |
申请公布日期 |
2008.02.05 |
申请号 |
US20040499180 |
申请日期 |
2004.06.16 |
申请人 |
NIPPON VALQUA INDUSTRIES, LTD. |
发明人 |
HAYASHI MICHINAO;SUGITANI TOHRU;ASANO YOSHITAKA |
分类号 |
H01G9/058;H01M4/86;C08J5/22;H01B1/24;H01M4/88;H01M4/96;H01M8/02;H01M8/10 |
主分类号 |
H01G9/058 |
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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