초록 ▼

A multilayer packaging film, package and process for aseptic packaging applications. The multilayer packaging film includes (a) an inner sealant layer comprising a olefin polymer having a Vicat Softening Point greater than 90째 C.; (b) an oxygen barrier layer; and (c) an outer layer comprising a poly

A multilayer packaging film, package and process for aseptic packaging applications. The multilayer packaging film includes (a) an inner sealant layer comprising a olefin polymer having a Vicat Softening Point greater than 90째 C.; (b) an oxygen barrier layer; and (c) an outer layer comprising a polymeric layer selected from olefin polymers and polyester homopolymers or copolymers having a silicone or other hydrogen peroxide resistant exterior coating, said outer layer having a Vicat Softening Point greater than 90째 C.

대표청구항 ▼

What is claimed is: 1. A multilayer film laminate adapted for aseptic packaging applications, said film comprising: (a) an inner polymeric surface sealant layer comprising an olefin polymer having a Vicat Softening Point greater than 90째 C.; (b) an intermediate oxygen barrier layer comprising a met

What is claimed is: 1. A multilayer film laminate adapted for aseptic packaging applications, said film comprising: (a) an inner polymeric surface sealant layer comprising an olefin polymer having a Vicat Softening Point greater than 90째 C.; (b) an intermediate oxygen barrier layer comprising a metallized film selected from metallized biaxially oriented polyester terephthalate and metallized biaxially oriented nylon; and (c) an outer polymeric surface layer selected from the group consisting of olefin polymers having a Vicat Softening Point greater than 90째 C. and polyester homopolymers or copolymers having a silicone exterior coating; wherein said multilayer film laminate has a total thickness of less than 4.0 mil. 2. The multilayer film laminate of claim 1, wherein said inner sealant layer is selected from the group consisting of ethylene-α-olefin copolymers, low density polyethylene, high density polyethylene, polypropylene-ethylene copolymers and mixtures thereof. 3. The multilayer film laminate of claim 1, wherein said inner sealant layer comprises an ethylene-α-olefin copolymer. 4. The multilayer film laminate of claim 3, wherein said ethylene-α-olefin copolymer comprises a copolymer of ethylene and at least one C3 to C10 α-olefin. 5. The multilayer film laminate of claim 4, wherein said at least one C3 to C10 α-olefin is selected from hexene-1 and octene-1. 6. The multilayer film laminate of claim 1, wherein said inner sealant layer has a melting point greater than 120째 C. 7. The multilayer film laminate of claim 1, wherein said inner sealant layer has a density greater than 0.910 g/cc. 8. The multilayer film laminate of claim 1, wherein said inner sealant layer has a density greater than 0.910 g/cc. 9. The multilayer film laminate of claim 1, wherein said olefin polymer comprises a propylene-ethylene copolymer having an ethylene content of less than 10% by weight. 10. The multilayer film laminate of claim 1, wherein said outer layer is selected from the group consisting of ethylene-α-olefin copolymers, low density polyethylene, high density polyethylene, polypropylene-ethylene copolymers, polypropylene homopolymers and copolymers, and polyester homopolymers and copolymers having a silicone exterior coating. 11. The multilayer film laminate of claim 1, wherein said outer layer comprises a biaxially oriented polypropylene homopolymer or copolymer film. 12. The multilayer film laminate of claim 1, wherein said outer layer comprises a cast polypropylene homopolymer or copolymer film. 13. The multilayer film laminate of claim 1, wherein said outer layer includes a layer of ink printed on at least one surface thereof. 14. The multilayer film laminate of claim 1, wherein said film laminate further includes at least one first intermediate layer between said inner sealant layer and said oxygen barrier layer. 15. The multilayer film laminate of claim 1, wherein said film laminate further includes at least one second intermediate layer between said outer layer and said oxygen barrier layer. 16. The multilayer film laminate of claim 1, wherein said inner sealant layer comprises an exterior surface layer of a multilayer coextruded film. 17. The multilayer film laminate of claim 16, wherein said multilayer coextruded film includes five layers including an interior surface layer comprising low density polyethylene, a first tie layer, an ethylene-vinyl alcohol copolymer layer, a second tie layer and an exterior surface layer, wherein said first polymeric adhesive tie layer bonds said interior surface layer to a first surface of said ethylene-vinyl alcohol copolymer layer and said second polymeric adhesive tie layer bonds a second surface of said ethylene-vinyl alcohol copolymer layer to the exterior surface layer of said multilayer coextruded film. 18. The multilayer film laminate of claim 1 having an Elmendorf tear strength of 300 grams force or less in at least the transverse direction. 19. A multilayer film laminate adapted for aseptic packaging applications, said film comprising: (a) an inner polymeric surface sealant layer comprising a olefin polymer having a Vicat Softening Point greater than 90째 C. selected from the group consisting of ethylene-α-olefin copolymers, low density polyethylene, high density polyethylene, polypropylene-ethylene copolymers and mixtures thereof; (b) an intermediate oxygen barrier layer comprising a metallized film selected from metallized biaxially oriented polyester terephthalate and metallized biaxially oriented nylon; and (c) an outer polymeric surface layer comprising a biaxially oriented polypropylene homopolymer or copolymer film a polymeric layer selected from the group consisting of ethylene-α-olefin copolymers, low density polyethylene, high density polyethylene, polypropylene-ethylene copolymers, polypropylene homopolymers and copolymers, and polyester homopolymers and copolymers having a silicone exterior coating, said outer layer having a Vicat Softening Point greater than 90째 C.; wherein said multilayer film laminate has a total thickness of less than 4.0 mil. 20. An aseptic package for food items formed from a packaging film folded into a cylinder and sealed longitudinally, said packaging film including: (i) an inner surface sealant layer comprising a olefin polymer having a Vicat Softening Point greater than 90째 C.; (ii) an intermediate oxygen barrier layer comprising a metallized film selected from metallized biaxially oriented polyester terephthalate and metallized biaxially oriented nylon; and (iii) an outer surface layer comprising a polymeric layer selected from the group consisting of olefin polymers and polyester homopolymers or copolymers having a silicone exterior coating, said outer layer having a Vicat Softening Point greater than 90째 C.; wherein said multilayer film laminate has a total thickness of less than 4.0 mil. 21. A multilayer film laminate adapted for aseptic packaging applications, said film comprising: (a) an inner polymeric surface sealant layer comprising an olefin polymer having a Vicat Softening Point greater than 90째 C.; (b) an intermediate oxygen barrier layer comprising a metallized film selected from metallized biaxially oriented polyester terephthalate and metallized biaxially oriented nylon; and (c) an outer polymeric surface layer selected from the group consisting of olefin polymers having a Vicat Softening Point greater than 90째 C. and polyester homopolymers or copolymers having a hydrogen peroxide resistant exterior coating; wherein said multilayer film laminate has a total thickness of less than 4.0 mil.