Claims
- 1. A stretched multi-layer oxygen gas barrier film combination comprising in the following order:
- (a) a base layer of polypropylene homopolymer or copolymer at least one surface thereof comprising a maleic acid anhydride modified polypropylene homopolymer or copolymer;
- (b) a skin layer of an amorphous polyamide directly bonded on said at least one surface comprising a maleic acid anhydride modified polypropylene homopolymer or copolymer; and
- (c) a vacuum metallized layer on said polyamide skin layer.
- 2. The film combination of claim 1 wherein said at least one surface of (a) comprises:
- (1) said maleic anhydride modified polypropylene homopolymer or copolymer intermixed with said base layer polypropylene homopolymer or copolymer; or
- (2) a separately applied skin layer comprising said maleic anhydride modified polypropylene homopolymer or copolymer on said base layer.
- 3. The film combination of claim 1 wherein said base layer has a heat sealable layer on the surface opposite the surface carrying said polyamide skin layer.
- 4. The film combination of claim 3 wherein said heat sealable layer is a member selected from the group consisting of an ethylene-propylene random copolymer and an ethylene-propylene-butene-1 terpolymer.
- 5. The film combination of claim 1 wherein said metallized layer comprises aluminum.
- 6. The film combination of claim 3 wherein the metallized layer is laminated to another polyolefin film.
Parent Case Info
This is a continuation of application Ser. No. 08/078,498, filed on Jun. 21, 1993 now abandoned, which is a continuation of U.S. patent application Ser. No. 07/805,177, filed Dec. 11, 1991, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0096581 |
Dec 1983 |
EPX |
Continuations (2)
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Number |
Date |
Country |
Parent |
78498 |
Jun 1993 |
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Parent |
805177 |
Dec 1991 |
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