Method and apparatus for texturing a thermoplastic film

Details Method and apparatus for texturing a thermoplastic film Method and apparatus for texturing a thermoplastic film

B - Operations, Transporting

29

C

18/1054

B29C 59/06 (2006.01) B29C 51/22 (2006.01) B29C 59/02 (2006.01)

Patent

CA 1140720

ABSTRACT A method of and apparatus for texturing a running ribbon of thermoplastic sheet material or film. The ap- paratus causes a ribbon of such film to be forwarded from a supply such as a roll of thermoplastic material, thence about a circumferentially extending portion of a rotating texturing cylinder, and then downstream where the textured film may be further processed or where it may be wound on a spool to form a roll thereof. The texturing cylinder com- prises a tubular member having a coating of spheroidal particles adhered to the surface thereof. While the film is in contact with the texturing cylinder, it is both heated and urged against the texturing cylinder, causing the film to assume the textured image of the texturing cylinder. The apparatus may further control tension in the film both upstream and downstream of the texturing cylinder at pre- determined constant levels. A method of making the tex- turing cylinder is also disclosed in which an epoxy film having spheroidal particles dispersed therein is electro- statically coated onto the radially outwardly facing surface of the texturing cylinder.

351201

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