Composites of polytetrafluoroethylene, intermediate products...

Details Composites of polytetrafluoroethylene, intermediate products... Composites of polytetrafluoroethylene, intermediate products...

B - Operations, Transporting

32

B

B32B 7/12 (2006.01) B29C 43/20 (2006.01) B32B 5/02 (2006.01) B32B 27/12 (2006.01) B32B 27/30 (2006.01) F16C 33/20 (2006.01)

Patent

CA 2158805

Composite bodies of polytetrafluoroethylene (PTFE) which have a surface with good surface slip comprise layers, one on top of the other, of a) PTFE, b) a copolymer which has predominantly tetrafluoroethylene units and acts as a hot-melt adhesive with respect to the PTFE, c) a fiber material which is stable up to at least 400°C and d) at least one plastic which can be processed as a melt. For this, layers a) to c) are first compression-molded at about 350 to 400°C, after which the intermediate product thus obtained can be compression-molded in one or more steps with the plastic or plastics which can be processed as a melt.

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