Process for producing thermoplastic resin foams

Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding

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Details

264 50, 425199, 425208, B29C44/20;47/64

Patent

active

059025298

ABSTRACT:
An improved process and apparatus for producing a thermoplastic resin foam by mixing a thermoplastic resin, a blowing agent and other necessary components in a molten state and extruding the mixture to expand. The apparatus comprises a metering zone provided at the front end of the rotating shaft in an extruder, a kneading zone provided closer to the rear end than the metering zone, and a plurality of perforated plates mounted on the surface of the shaft in the kneading zone. The outside diameter of said shaft is made smaller than that of the screw in the metering zone as measured at the bottom of channels. This feature combines with the perforated plates to insure uniform mixing and consistent extruding operations.

REFERENCES:
patent: 2835927 (1958-05-01), Henning
patent: 3599292 (1971-08-01), Camerlata
patent: 3713762 (1973-01-01), Oisugu
patent: 3792839 (1974-02-01), Gidge
patent: 3856442 (1974-12-01), Gallagher et al.
patent: 3920876 (1975-11-01), Albert et al.
patent: 3954365 (1976-05-01), Barth et al.
patent: 3981649 (1976-09-01), Shimano et al.
patent: 4017225 (1977-04-01), Hanning
patent: 4057379 (1977-11-01), Sato
patent: 4087222 (1978-05-01), Noel
patent: 4107247 (1978-08-01), Dukess
patent: 4206165 (1980-06-01), Dukess
patent: 4401612 (1983-08-01), Nehmey et al.
patent: 4454087 (1984-06-01), Hayashi et al.
patent: 4615664 (1986-10-01), Kolossow
patent: 4994223 (1991-02-01), Hestehave et al.
patent: 5055027 (1991-10-01), Sato
patent: 5124095 (1992-06-01), Gianni et al.
patent: 5413475 (1995-05-01), Murata et al.

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