B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1021
B29C 41/28 (2006.01) B29C 41/12 (2006.01) B29C 41/46 (2006.01)
Patent
CA 1319803
ABSTRACT OF THE DISCLOSURE A method is provided for preparation of a fluo- rpolymeric film on a carrier, comprising: (a) preparing an aqueous dispersion comprising a halopolymer, e.g., a fluoropolymer; (b) coating 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 chem- ical 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.
607034
Effenberger John A.
Koerber Keith G.
Latorra Michael N.
Petriello John V.
Chemfab Corporation
Ridout & Maybee Llp
LandOfFree
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