Process for reducing draw resonance in polymeric film

Details Process for reducing draw resonance in polymeric film Process for reducing draw resonance in polymeric film

1984-12-28

1986-08-26

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264171, 264237, 264284, 264348, 425 72R, 425224, 4253261, B29C 4788

Patent

active

046082212

ABSTRACT:
A process for reducing draw resonance of a polymeric molten film susceptible to draw resonance under conditions which would cause draw resonance by extruding the film from a die and rapidly cooling said film in a rapid cooling zone containing a pressure roll and chill roll by providing a tensioning device between said die and the nip of said pressure and chill roll, said tensioning device providing a substantially friction free surface with respect to said moving film.

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patent: 4255365 (1981-03-01), Heyer
patent: 4486377 (1984-12-01), Lucchesi et al.

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