초록 ▼

The present invention is directed to a polymer blend formulation and to heat shrinkable film, bags, pouches and the like made therefrom. The invention is further directed to a method of producing a heat shrinkable film with the proper gas permeability properties so that it is ideal for packaging and

The present invention is directed to a polymer blend formulation and to heat shrinkable film, bags, pouches and the like made therefrom. The invention is further directed to a method of producing a heat shrinkable film with the proper gas permeability properties so that it is ideal for packaging and preservation of gassing cheese.

대표청구항 ▼

1. A film comprising five layers, where a middle layer comprises a polymer blend comprising: a) a polyvinylidene chloride (PVDC) polymer, wherein the PVDC polymer is a copolymer wherein a major amount of the copolymer comprises vinylidene chloride and a minor amount of the copolymer comprises one or

1. A film comprising five layers, where a middle layer comprises a polymer blend comprising: a) a polyvinylidene chloride (PVDC) polymer, wherein the PVDC polymer is a copolymer wherein a major amount of the copolymer comprises vinylidene chloride and a minor amount of the copolymer comprises one or more monomers selected from the group consisting of vinyl chloride, alkyl acrylate and alkyl methacrylate;b) unmodified ethylene vinyl acetate (EVA) with more than 40% vinyl acetate (per weight);c) polyvinyl chloride (PVC); andd) an epoxidized oil compound and optionally other additives. 2. A film according to claim 1, where the film is heat shrinkable. 3. The film according to claim 1, wherein an outer layer of the film comprises one of: a polypropylene polymeran ethylene alpha olefin copolymera styrene butadiene polymera polyamidea polybutene and/oran ethylene vinyl alcohol (EVOH) polymer. 4. The film of according to claim 1, wherein a sealing layer of the film comprises ethylene alpha olefin copolymer. 5. The film according to claim 1, wherein the film is irradiated. 6. The film according to claim 1, having a flat or tubular form. 7. A bag or pouch made from the film of claim 1. 8. A cheese packed in a film according to claim 1. 9. A film comprising at least an outer layer, a sealing layer, and a layer comprising a polyvinylidene chloride (PVDC) blend, wherein the outer layer is a layer which comes into immediate contact with the outside environment and the sealing layer is a layer that comes into direct contact with a product when the film is used to pack a product, and wherein the layer comprising the PVDC blend comprises: a) a PVDC polymer, wherein the PVDC polymer is a copolymer wherein a major amount of the copolymer comprises vinylidene chloride and a minor amount of the copolymer comprises one or more monomers selected from the group consisting of vinyl chloride, alkyl acrylate and alkyl methacrylate;b) unmodified ethylene vinyl acetate (EVA) with more than 40% vinyl acetate (per weight);c) polyvinyl chloride (PVC); andd) an epoxidized oil compound and optionally other additives. 10. The film according to claim 9, wherein the film is heat shrinkable. 11. The film according to claim 9, wherein the outer layer of the film comprises one of: a polypropylene polymeran ethylene alpha olefin copolymera styrene butadiene polymera polyamidea polybutene and/oran ethylene vinyl alcohol (EVOH) polymer. 12. The film according to claim 9, wherein the sealing layer of the film comprises ethylene alpha olefin copolymer. 13. The film according to claim 9, wherein the film is irradiated. 14. The film according to claim 9, having a flat or tubular form. 15. The film according to claim 9, wherein the percentage of EVA in the PVDC blend is less than 20% per weight of the total PVDC blend. 16. The film according to claim 9, wherein the percentage of PVC in the PVDC blend is less than 2% per weight of the total PVDC blend. 17. The film according to claim 9, wherein the percentage of epoxidized oil compound in the PVDC blend is less than 5% per weight of the total PVDC blend. 18. A bag or pouch made from the film of claim 9. 19. A cheese packed in a film according to claim 9. 20. A film comprising at least an outer layer, a sealing layer, and a barrier layer, wherein the outer layer is a layer which comes into immediate contact with the outside environment and the sealing layer is a layer that comes into direct contact with a product when the film is used to pack a product, and wherein the barrier layer comprises a polymer blend comprising: a) a polyvinylidene chloride (PVDC) polymer, wherein the PVDC polymer is a copolymer wherein a major amount of the copolymer comprises vinylidene chloride and a minor amount of the copolymer comprises one or more monomers selected from the group consisting of vinyl chloride, alkyl acrylate and alkyl methacrylate;b) unmodified ethylene vinyl acetate (EVA) with more than 40% vinyl acetate (per weight);c) polyvinyl chloride (PVC); andd) an epoxidized oil compound and optionally other additives.