Laminated films

Details Laminated films Laminated films

1994-06-20

1999-09-07

Dye, Rena L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428339, 428516, 428518, 428520, 428910, 428 349, B65B 5302, B32B 2706

Patent

active

059485132

ABSTRACT:
The invention provides a heat-shrinkable thermoplastics packaging film comprising a laminate of two or more individual heat-shrinkable thermoplastics packaging films, where each of the individual films is substantially identical in composition and layer construction. The films are preferably prepared from double wound film, especially biaxially oriented film comprising LLDPE. The invention also provides a process of preparing such a film, comprising: a) providing two layers of heat-shrinkable thermoplastics packaging film, namely a first layer and a second layer, each of the first and second layers having inner and outer surfaces, the inner surfaces being adjacent to each other; b) treating the outer surface of the first layer to enable the first layer to adhere to the second layer; and c) winding the two layers together into a roll, such that the treated outer surface of the first layer adheres to the outer surface of the second layer to form a laminate. The laminated films of the invention have good strength as well as being advantageously thin.

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Guide to Corona Film Trea Modern Plastics, May, 1961.

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