Flexible wrapping material and method of manufacture

Details Flexible wrapping material and method of manufacture Flexible wrapping material and method of manufacture

1982-06-01

1983-12-20

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

15624411, 426127, 428483, 428516, 428518, 428520, 428522, B32B 2706, B29C 1900, B33B 2708

Patent

active

044218230

ABSTRACT:
A flexible wrapping material comprising a film laminate is provided for packaging of food products which is resistant to flex-cracking and pinhole development, is impervious to liquids and gasses, and exhibits the property of grease-resistance without the use of adhesives to promote bonds between the layers. The film laminate consists of an outer layer of heat-set, biaxially oriented polymeric material followed by a layer of polymeric material, a layer of oxygen barrier polymer, a layer of biaxially oriented polypropylene, a special grease-resistant polymer, and an inner layer of heat-sealable polymeric material. The film laminate is made by bonding the outer surface layer of heat-set, biaxially oriented polymer to a substrate in which an oxygen barrier material is carried on a biaxially oriented polypropylene/special grease-resistant polymer by means of an intermediate layer of polymeric material. A layer of heat-sealable polymeric material is then extrusion-coated on the special polymer surface to form the inner layer of the laminate.

REFERENCES:
patent: Re28554 (1975-09-01), Curler et al.
patent: 3386648 (1968-06-01), Powell
patent: 3442687 (1969-05-01), Hagan

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