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.
Claims14
A laminated film structure comprising
- at least one layer of fluoropolymer film;
- at least one primer layer of an amine functional acrylic polymer applied to at least one surface of said fluoropolymer film, said primer layer having a thickness of 1-50 microns;
- at least one thermoplastic adhesive layer containing acid modified polyolefin, said adhesive being adhered to the primed surface of said fluoropolymer film;
- and
- a thermoplastic substrate adhered to said thermoplastic adhesive layer, said thermoplastic substrate being selected from the group consisting of polyolefin, polyester, and polyamide.
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 having a primer layer, said primer layer having a thickness of 1-50 microns;
- 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 acid modified polyolefin;
- forming a thermoplastic substrate and adhering said substrate to said layer of thermoplastic adhesive, said thermoplastic substrate being selected from the group consisting of polyolefin, polyester, and polyamide.
Dependencies are inferred from the claim text.