Heat-sealable laminar thermoplastic films

Details Heat-sealable laminar thermoplastic films Heat-sealable laminar thermoplastic films

1981-03-30

1983-01-04

Lesmes, George F.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624414, 15624424, 4273981, 4274071, 428516, 428520, 428349, B29C 1900

Patent

active

043671128

ABSTRACT:
A biaxially oriented polypropylene film is provided which exhibits improved heat-seal strength and good optical clarity. The polypropylene film is characterized by having on at least one surface thereof a continuous coating of a heat-sealable film layer comprising a copolymer of ethylene and methylacrylate. The lamination may be formed by machine direction orientation of an uncoated polypropylene base web followed by extrusion coating with the copolymer material and subsequent transverse direction orientation of the combined layers.

REFERENCES:
patent: 3519531 (1970-07-01), James et al.
patent: 4058645 (1977-11-01), Steiner
patent: 4058649 (1977-11-01), Steiner
patent: 4125662 (1978-11-01), Weiner et al.
patent: 4147827 (1979-03-01), Breidt et al.

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