Claims
- 1. A plastic film having improved adhesion properties as a substrate for a coating of a metal, said film comprising a blend of polypropylene and an acid terpolymer comprising an ester monomer, an acidic monomer and ethylene.
- 2. The plastic film of claim 1 on which is deposited a thin layer of metal.
- 3. The plastic film of claim 2 in which said thin layer of metal is deposited on said plastic film by vacuum vapor deposition.
- 4. The plastic film of claim 1 wherein said ester monomer is selected from the group consisting of: methyl acrylate, alkyl methacrylates wherein the alkyl group contains 1 through 8 carbons and alkyl hydrogen maleates wherein the alkyl group contains 1 through 8 carbons.
- 5. The plastic film of claim 4 wherein said acidic monomer is selected from the group consisting of: acrylic acid, methacrylic acid and maleic acid.
- 6. The plastic film of claim 1 wherein the proportion by weight of said polypropylene to said acid terpolymer is in the range of from 99.5/0.5 to 0.5/99.5.
- 7. The plastic film of claim 1 wherein the proportion by weight of said polypropylene to said acid terpolymer is in the range of from 95/5 to 75/25.
- 8. The plastic film of claim 1 wherein the proportion by weight of said polypropylene to said acid terpolymer is in the range of from 90/10 to 80/20.
- 9. The plastic film of claim 1 wherein said film is biaxially oriented.
- 10. The plastic film of claim 1 wherein said polypropylene is heat set.
- 11. The plastic film of claim 1 wherein said film has a surface that has been subjected to electrostatic surface treatment to improve the adhesion properties thereof.
Parent Case Info
This application is a division of U.S. patent application Ser. No. 07/610,528, filed Nov. 8, 1990 is now U.S. Pat. No. 5,206,051.
US Referenced Citations (20)
Divisions (1)
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Number |
Date |
Country |
Parent |
610528 |
Nov 1990 |
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