Method for manufacture of cast fluoropolymer-containing films at high productivity
US4883716A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Aug 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is provided for preparation of a fluoropolymeric film on a carrier, comprising: PA0 (a) preparing an aqueous dispersion comprising a fluoropolymer; PA0 (b) dipping a carrier belt through the dispersion such that a coating of the dispersion is formed on the carrier belt; PA0 (c) passing the coated carrier belt through a metering zone to remove excess dispersion; PA0 (d) drying the metered coated carrier to remove the water from the dispersion; and PA0 (e) heating the dried coated carrier to a temperature sufficient to consolidate the dispersion, wherein 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.