发明名称 |
MICROPOROUS TUBES AND PROCESS FOR PRODUCING THE SAME |
摘要 |
<p>Polytetrafluoroethylene resin tubes having small pore size and high porosity are produced by a process which includes stretching the tubes by drawing using a metal die and a metal plug. By using the die and plug, the stress necessary for stretching is converted to a compressive force in the thickness direction of the tube. This compressive force is an essential factor in producing the microporous structure of the tubes. In addition, when stretching is performed by drawing, a ratio of thickness to inside diameter of the tube of 0.07 or less can be easily achieved.</p> |
申请公布号 |
GB1590275(A) |
申请公布日期 |
1981.05.28 |
申请号 |
GB19770037394 |
申请日期 |
1977.09.07 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES LTD |
发明人 |
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分类号 |
C08J9/00;B29C47/00;B29C55/00;B29C55/12;B29C55/30;B29D23/00;C08J5/18;C08L27/18;F16L9/00;F16L11/04;(IPC1-7):16L11/06;16L11/12 |
主分类号 |
C08J9/00 |
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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