Method for making a packing laminate

Details Method for making a packing laminate Method for making a packing laminate

1976-10-05

1977-12-13

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156259, 156271, 156500, 264146, 264159, 428315, B29D 2700, B29F 300

Patent

active

040627128

ABSTRACT:
A packing laminate for use in the manufacture of disposable packages consists of a relatively thin central layer made from high-density polyethylene, two intermediate foam layers of polystyrene applied respectively to opposite faces of the central layer by means of a thermoplastic glue and two outer layers of a compact high-impact polystyrene applied respectively to the intermediate layers. The laminate is manufactured by joint extrusion of a flexible tube consisting of an inner layer of the foamed polystyrene and an outer layer of the compact high-impact polystyrene, this tube being thereafter split longitudinally into two halves to form two webs which are then joined respectively to opposite sides of the central layer of high density polyethylene following its extrusion.

REFERENCES:
patent: 3524795 (1970-08-01), Peterson
patent: 3645822 (1972-02-01), Widiger et al.
patent: 3758354 (1973-09-01), Sakurai et al.
patent: 3758370 (1973-09-01), Sakurai et al.
patent: 3822161 (1974-07-01), Haase

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