Packaging film, package and process for aseptic packaging
AssigneeCurwood, Inc.
InventorsSam Edward Wuest, Richard Roy Bellile
Life of this patent
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Abstract
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 90° 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 90° C.
Claims21
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 90° 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 90° 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.
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 90° 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 90° C.;
- wherein said multilayer film laminate has a total thickness of less than 4.0 mil.
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 90° 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 90° C.;
- wherein said multilayer film laminate has a total thickness of less than 4.0 mil.
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 90° 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 90° 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.
Dependencies are inferred from the claim text.