Method for producing plastics material films

Details Method for producing plastics material films Method for producing plastics material films

1987-07-09

1989-05-23

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264175, 264237, 425 721, B29C 4324

Patent

active

048328960

ABSTRACT:
A method and apparatus are provided to prevent specks of condensation products being formed on a plastics material film produced by a calendering technique. In the method, after the film has left the final calender roller, the film is passed around at least one take-up roller and is blown against the shell of the roller by compressed air issuing from nozzles. While on the shell of the roller the film is cooled to a temperature below the condensation temperature of the volatile substances released from the surface of the film.

REFERENCES:
patent: 2437680 (1948-03-01), Cornelius
patent: 2534291 (1950-12-01), Moss
patent: 3159696 (1964-12-01), Hodgson, Jr.
patent: 3999911 (1976-12-01), Matsubara
patent: 4605366 (1986-08-01), Lehmann et al.
patent: 4627804 (1986-12-01), Kobayashi et al.
patent: 4668463 (1987-05-01), Cancio et al.

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