Continuous flood foaming of thermoplastic resin

Details Continuous flood foaming of thermoplastic resin Continuous flood foaming of thermoplastic resin

1977-08-15

1979-03-06

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264236, 264347, 264DIG18, 432 8, B29D 2700

Patent

active

041431065

ABSTRACT:
A continuous method for foaming foamable thermoplastic resin by floating the resin upon a heated liquid bath while heating it from above by flooding the upper surface of the floating resin material with a blanket of a liquid at substantially the same temperature as the heated bath. In an example, the flooding liquid is pumped from the heated bath and sprayed over the upper surface of the floating resin material.

REFERENCES:
patent: 2971221 (1961-02-01), Schoenbeck
patent: 3024492 (1962-03-01), Antolino
patent: 3051992 (1962-09-01), Bradley
patent: 3382303 (1968-05-01), Stieg
patent: 3394045 (1968-07-01), Gould
patent: 3562367 (1971-02-01), Shinohara et al.
patent: 3600336 (1971-08-01), Okada et al.
patent: 3812225 (1974-05-01), Hosoda et al.
patent: 3859247 (1975-01-01), MacKenzie
patent: 4029450 (1977-06-01), Caser

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