发明名称 |
METHOD OF MAKING LAMINATED PTFE-CONTAINING COMPOSITES AND PRODUCTS THEREOF |
摘要 |
Dispersion polymerized PTFE itself, if provided in an unfused state, is sufficiently capable of acting as a pressure sensitive adhesive to facilitate the formation of an initial mechanical bond between components of a laminate such that it may be subsequently heat treated in a relatively short period of time to produce a well-bonded final laminate. This fact makes it possible to prepare a laminate comprising at least one layer containing PTFE by the steps of: (a) preparing a first dimensionally stable laminate component having two major surfaces, at least one of said major surfaces having an exposed layer comprising unfused PTFE; (b) preparing a second dimensionally stable laminate component having two major surfaces, at least a first of said major surfaces being capable of forming an integral bond with the unfused PTFE-containing layer; (c) bringing said first and second laminate components together so that the exposed layer comprising unfused PTFE and the surface bondable with the unfused PTFE-containing layer are in contact with each other; (d) applying pressure to the combined laminate components at moderate temperature to achieve intimate contact and form a mechanical bond between the first and second laminate components; (e) introducing the mechanically bonded laminate to a heating zone under conditions which avoid delamination; and (f) sintering the mechanically bonded laminate components in a heating zone to consolidate the unfused PTFE-containing layer. The mechanical bond formed is sufficiently strong that the consolidation can be done in a free-sintering process (no applied pressure). Application of pressure, however, is generally not detrimental to the product. |
申请公布号 |
EP0419594(B1) |
申请公布日期 |
1997.03.26 |
申请号 |
EP19900903091 |
申请日期 |
1990.01.30 |
申请人 |
CHEMFAB CORPORATION |
发明人 |
EFFENBERGER, JOHN, A.;ENZIEN, FRANCIS, M.;KEESE, FRANK, M.;KOERBER, KEITH, G. |
分类号 |
B29C65/00;B32B7/04;C08J5/12;H05K1/03 |
主分类号 |
B29C65/00 |
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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