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US 7,070,675 B2Granted
Fluoropolymer film structures and laminates produced therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorsJames John Schmidt, Larry Glen Snow
Life of this patent
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Abstract
Fluoropolymer films which combine the attributes of outdoor durability, chemical resistance and thermoformability with paint-like aesthetics are formed into film structures which have at least one surface coated with a primer of amine functional polymer and an overcoat of a thermoplastic adhesive of acid modified polyolefin. Fluoropolymer films so coated are securely bonded to a variety of thermoplastic substrates forming a laminated film structure which resists delamination when exposed to moisture and humidity.
Claims9
A process for making a laminated film structure comprising:
- depositing an amine functional acrylic polymer on a fluoropolymer film to form a primed fluoropolymer film;
- forming a layer of thermoplastic adhesive and adhering said layer to said amine functional acrylic polymer of said primed fluoropolymer film, said thermoplastic adhesive containing an acid modified polyolefin;
- forming a thermoplastic substrate and adhering said substrate to said layer of thermoplastic adhesive;
- wherein said layer of thermoplastic adhesive is formed and adhered to said amine functional acrylic polymer of said primed fluoropolymer film by extrusion onto said primed fluoropolymer film.
1 more element
Dependencies are inferred from the claim text.