Coextruded heat sealable laminar thermoplastic films

Details Coextruded heat sealable laminar thermoplastic films Coextruded heat sealable laminar thermoplastic films

1978-10-26

1980-04-08

Ansher, Harold

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624424, 15624426, 156311, 156320, 156322, B32B 3126, B32B 3130

Patent

active

041971507

ABSTRACT:
Laminar thermoplastic films are provided which exhibit improved heat seal strengths as well as heat seal temperature ranges. The laminates comprise a predominantly propylene-based polymer substrate or core, the propylene core layer being coated with continuous skins, the skins being fabricated from ethylene based resin with a density of less than 0.939.

REFERENCES:
patent: 2901770 (1959-09-01), Beck
patent: 3017302 (1962-01-01), Hultrans
patent: 3397101 (1968-08-01), Rausing
patent: 3481804 (1969-12-01), Snyder
patent: 3697368 (1972-10-01), Bhuta et al.
patent: 3707590 (1972-12-01), Wiggins et al.
patent: 4076568 (1978-02-01), Kubat et al.
patent: 4151318 (1979-04-01), Marshall

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