Process for compression rolling of polymeric films

Details Process for compression rolling of polymeric films Process for compression rolling of polymeric films

B - Operations, Transporting

29

D

18/1030

B29D 7/14 (1980.01)

Patent

CA 1109626

ABSTRACT OF THE DISCLOSURE A process for compression rolling of thermoplastic sheet material such as polyethylene or polypropylene which involves passing the material between cylindrical rollers under semi-boundary or boundary lubrication conditions to effect a reduction in the original thickness of the material of between about 5 and 95 percent in a single pass while maintaining the circumferential speed of the rollers essent- ially equal to the linear speed of the thermoplastic sheet material passing therebetween and maintaining the film rewind tension in the vicinity of the elastic limit of the material exiting from the rollers. The process is useful in that it can be carried out by continuous cold rolling, i.e. at ambient temperature.

294940

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