Winding tape and method of making winding tape

Details Winding tape and method of making winding tape Winding tape and method of making winding tape

B - Operations, Transporting

29

C

B29C 53/20 (2006.01) B29C 47/00 (2006.01) B29C 53/16 (2006.01) B29D 7/01 (2006.01) H01B 3/44 (2006.01)

Patent

CA 2416795

In a method for manufacturing a winding tape (10) of unsintered polytetrafluoroethylene wherein polytetrafluoroethylene powder is mixed with a lubricating or slip agent, the material is molded into a cylindrical blank (1) and the blank (1) is first extruded as a strand with small outer dimensions and subsequently calendered into the tape (10) in the forming gap (13) of a pair of rolls (8,9). The surface of at least one roll is deformed under compression during calendering of the round rope (6) into the tape.

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