Method of producing a film made of a thermoplastic material

Details Method of producing a film made of a thermoplastic material Method of producing a film made of a thermoplastic material

2007-10-31

2009-10-20

Davis, Robert B (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

Reexamination Certificate

active

07604770

ABSTRACT:
A method and a device for producing a film made of a thermoplastic material, wherein a plastic melt is blown up into a film bubble and is shaped into a desired film by a calibrating arrangement, and a downstream arranged flattening device. For providing as contactless as possible a guidance, calibration and flattening, film guidance elements are used with a laminar uniform air cushion between the film guidance element and the surface of the film bubble, without contact between the surface of the film bubble and the film guidance element.

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