Process and apparatus for redensifying thermoplastic resin foam

Details Process and apparatus for redensifying thermoplastic resin foam Process and apparatus for redensifying thermoplastic resin foam

1983-07-07

1985-03-12

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264DIG69, 425373, 425456, 425817C, 425DIG46, B29D 2700

Patent

active

045044368

ABSTRACT:
Disclosed is a process for increasing the density of thermoplastic resin foam waste material having apparent density as low as 5 kg/m.sup.3. The waste material in particle form is uniformly dispersed onto at least one vibrating plate of a furnace, and then heated to a temperature ranging between about 120.degree. C. and about 210.degree. C. The waste material is then compacted at the outlet end of the furnace and ground into particles of uniform size to be reused as thermoplastic resin material.

REFERENCES:
patent: 3607999 (1971-09-01), Corbett et al.
patent: 3723582 (1973-03-01), Winstead
patent: 3859404 (1975-01-01), Immel et al.
patent: 4254068 (1981-03-01), Otsuka
patent: 4396566 (1983-08-01), Brinkmann et al.

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