Method for manufacturing of cast films at high productivity

摘要

A method is provided for preparation of a fluoro-polymeric film on a carrier, covering: (a) preparing an aqueous dispersion of polymeric material; (b) dipping a fluoropolymer pre-treated carrier belt through the dispersion so that a coating of the dispersion is formed on the carrier belt; (c) passing the coated carrier belt through a metering zone to remove excess dispersion; (d) drying the metered coated carrier to remove the water from the dispersion; and (e) heating the dried coated carrier to a temperature sufficient to consolidate the dispersion. The carrier belt is formed from a material of low thermal mass having chemical and dimensional stability at the consolidation temperature of the dispersion and a work of adhesion between the carrier belt and the dispersion that does not exceed the yield strength of the consolidated fluoropolymeric film.