Heating foam container in unrestricted state to increase stiffne

Details Heating foam container in unrestricted state to increase stiffne Heating foam container in unrestricted state to increase stiffne

1983-10-11

1985-10-15

Dawson, Robert A.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

156 83, 264321, 4283186, 428913, B65D 1120, B32B 3126

Patent

active

045474125

ABSTRACT:
A method of improving the stiffness of a polystyrene foam container having a sidewall and a bottom, said container having been prepared from a laminate of polystyrene foam having generally spherical closed cells, and, on at least the outer surface thereof, a layer of solid polystyrene; said method comprising heating said container in the unrestrained state, said heating being sufficient to increase the thickness of the sidewall at least 10%, and cup produced by this method.

REFERENCES:
patent: 3260781 (1966-07-01), Lux et al.
patent: 3344222 (1967-09-01), Shapiro et al.
patent: 3616020 (1971-10-01), Whelan et al.
patent: 3669794 (1972-06-01), Mazur
patent: 3967991 (1976-07-01), Shimano et al.
patent: 4359160 (1982-11-01), Myers et al.

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