Barrier blend for use in food-packaging film
AssigneeW.R. Grace & Co.-Conn.
InventorsTito Fornasiero, Mario Paleari
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Abstract
A copolymer blend having improved extrusion performance comprising from 90 to 50% by weight of vinylidene chloride-vinyl chloride copolymer and from 10 to 50% by weight of a vinylidene chloride-methyl acrylate copolymer wherein the weight percentage of vinyl chloride in the blend is greater than 12% and the weight percentage of methyl acrylate in the blend is less than 2.8%.
Claims19
A copolymer blend comprising from 90 to 50% by weight of vinylidene chloride-vinyl chloride copolymer and from 10 to 50% by weight of a vinylidene chloride-methyl acrylate copolymer wherein the weight percentage of vinyl chloride in the blend is greater than 12% and the weight percentage of methyl acrylate in the blend is less than 2.8%.
A film comprising a copolymer blend comprising from 90 to 50% by weight of vinylidene chloride-vinyl chloride copolymer and from 10 to 50% by weight of a vinylidene chloride-methyl acrylate copolymer wherein the weight percentage of vinyl chloride in the blend is greater than 12% and the weight percentage of methyl acrylate in the blend is less than 2.8%.
A package or bag comprising a film comprising a copolymer blend comprising from 90 to 50% by weight of vinylidene chloride-vinyl chloride copolymer and from 10 to 50% by weight of a vinylidene chloride-methyl acrylate copolymer 12% and the weight percentage of methyl acrylate in the blend is less than 2.8%.
A method of making a film comprising:
- preparing a blend comprising from 90 to 50% by weight of vinylidene chloride-vinyl chloride copolymer and from 10 to 50% by weight of a vinylidene chloride-methyl acrylate copolymer wherein the weight percentage of vinyl chloride in the blend is greater than 12% and the weight percentage of methyl acrylate in the blend is less than 2.8%;
- and
- extruding the blend to form a film.
Dependencies are inferred from the claim text.