Bone-in food packaging article
AssigneeViskase Corporation
InventorsVincent J. Dudenhoeffer, Jeffrey M. Schuetz
Life of this patent
Estimating the term…
Abstract
An article for shrink packaging bone-in food masses such as meat cuts comprising a thin-walled heat shrinkable thermoplastic film bag and a thick-walled nonheat shrinkable thermoplastic film patch having its inner surface bonded to the bag outer surface. Both surfaces have high energy as the sole bonding means and the patch-bag bond strength increases during heat shrinking around the meat mass such that the bag portion adhered to the patch shrinks less than the rest of the bag.
Claims19
An article for enclosing bone-in food mass comprising a biaxially oriented heat shrinkable relatively thin-walled thermoplastic film bag and a non-heat shrinkable relatively thick-walled thermoplastic film patch having its inner surface bonded to outer surface of said bag, the patch outer surface comprising a member selected from the group consisting of ethylene vinyl acetate, very low density polyethylene and linear low density polyethylene, or blends thereof;
- the patch inner surface comprising a member selected from the group consisting of ethylene vinyl acetate, very low density polyethylene, and blends of ethylene vinyl acetate and very low density polyethylene;
- and the bag outer surface comprising a member selected from the group consisting of ethylene vinyl acetate, very low density polyethylene, blends of ethylene vinyl acetate and very low density polyethylene, blends of ethylene vinyl acetate and linear low density polyethylene, and blends of ethylene vinyl acetate, very low density polyethylene and linear low density polyethylene;
- and said patch inner surface and said bag outer surface each having high surface energy of at least about 38 dynes/cm wetting tension as the sole bonding means therebetween such that when said bag is filled with bone-in food mass, evacuated, sealed and heat shrunk around said mass, the strength of the patch-bag bond increases and the bag portion adhered to said patch shrinks to a lesser extent than the remainder of said bag, but said patch does not delaminate from said bag.
A food package comprising a heat shrunk and relatively thin-walled thermoplastic film bag with an outer surface comprising a member selected from the group consisting of ethylene vinyl acetate, very low density polyethylene, blends of ethylene vinyl acetate and very low density polyethylene, blends of ethylene vinyl acetate and linear low density polyethylene, and blends of ethylene vinyl acetate, very low density polyethylene and linear low density polyethylene;
- said bag containing bone-in food mass in an evacuated and sealed space within the bag such that the bone-in food mass outer surface is in direct supporting relationship with the collapsed bag inside surface;
- a non heat shrinkable and relatively thick-walled, thermoplastic film patch having an outer surface comprising a member selected from the group consisting of ethylene vinyl acetate, very low density polyethylene and linear low density polyethylene, or blends thereof;
- the patch inner surface comprising a member selected from the group consisting of ethylene vinyl acetate, very low density polyethylene, and blends of ethylene vinyl acetate and very low density polyethylene;
- and said patch inner surface and the heat shrunk bag outer surface being bonded together solely by each of said surfaces having high surface energy of at least about 38 dynes/cm wetting tension such that when said bag is heat shrunk the strength of the patch-bag bond increases and the bag portion adhered to said patch shrinks to a lesser extent than the nonpatched remainder of said bag, but said patch does not delaminate from said bag.
Dependencies are inferred from the claim text.