| 摘要 |
<p>A method is provided for preparation of a fluorpolymeric film on a carrier, comprising: (a) preparing an aqueous dispersion comprising a halopolymer, e.g., a fluoropolymer; (b) coatings the carrier belt with the dispersion; (c) moving 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; (e) heating the dried coated carrier belt to a temperature sufficient to at least substantially eliminate surfactants in the dispersion; (f) further heating the carrier belt to a temperature to melt or to soften the halopolymer; (g) cooling the polymer-coated carrier belt to consolidate the coated polymers; and (h) stripping the consolidated halopolymeric film from the carrier belt. The carrier belt has a low thermal mass with chemical and dimensional stability at the melting or softening temperature of the halopolymer, is uniformly wettable by the first dispersion applied, and exhibits a work of adhesion to the consolidated polymer coating that does not exceed the peel strength of the consolidated polymeric film.</p> |
