Method of making a polyethylene terephthalate laminate

Details Method of making a polyethylene terephthalate laminate Method of making a polyethylene terephthalate laminate

1974-04-02

1976-02-17

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156322, 428481, B29F 300

Patent

active

039390250

ABSTRACT:
A container is provided formed from a blank made of a laminate which includes nonbrowning paperboard and at least an inner layer of substantially amorphous polyethylene terephthalate bonded to the paperboard by its own substance. A method of making this laminate is provided including the steps of heating an uncoated surface or both surfaces of the paperboard to a temperature of at least about 285.degree.F. and extruding the polyethylene terephthalate layer onto this surface or these surfaces. A method of cooking is provided including the steps of forming a container from the blank, placing food in the container and cooking the food at a temperature of up to about 400.degree.F.

REFERENCES:
patent: 3238284 (1966-03-01), Sutton
patent: 3372148 (1968-03-01), Wiener
patent: 3382295 (1968-05-01), Taylor et al.
patent: 3498865 (1970-03-01), Paquin et al.
patent: 3515626 (1970-06-01), Duffield

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