Process for continuously producing foamed sheets

Details Process for continuously producing foamed sheets Process for continuously producing foamed sheets

1978-08-14

1980-07-22

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 25, 264 54, 264555, 264101, 2642101, 264DIG5, 264DIG18, B29D 2700

Patent

active

042139252

ABSTRACT:
A plastic foamed sheet of excellent quality is produced by preheating in a chamber including a conveyor means for continuously conveying a thermoplastic resin sheet containing a heat-decomposable blowing agent in the horizontally supported state and a heating means for heating the sheet to a temperature lower than the decomposition temperature of the blowing agent, and foaming in a foaming chamber connected to the preheating chamber and including a heating means for heat-foaming the sheet as it is continuously conveyed while being perpendicularly suspended from the terminal of the conveyor means.

REFERENCES:
patent: 3711584 (1973-01-01), Sagane et al.
patent: 3762845 (1973-10-01), Sagane et al.
patent: 4124344 (1978-11-01), Kiyono et al.

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