Method of extruding thermoplastic films

Details Method of extruding thermoplastic films Method of extruding thermoplastic films

1972-09-13

1976-08-24

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156500, 229 31, 427256, 427288, B29B 500, B29F 306

Patent

active

039765270

ABSTRACT:
A composite article suitable for forming liquid-containing paperboard cartons is made by laminating an extruded thermoplastic film to an elongated paperboard web. The film has thick and thin strips and the thick strips are laminated to the web over areas thereof which are to ultimately form the bottom portions of the cartons. Thermoplastic material is regulated within an extruder and after extrusion the film takes on a profile imparted by the regulation of the material within the extruder die.

REFERENCES:
patent: 2514211 (1950-07-01), Carlson
patent: 3305383 (1967-02-01), Gordy

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