Apparatus and method for reclaiming polymer waste

Details Apparatus and method for reclaiming polymer waste Apparatus and method for reclaiming polymer waste

1978-01-25

1979-03-06

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

425 72R, B29H 1900

Patent

active

041430018

ABSTRACT:
A continuous process and apparatus for remelting fluffy, high bulk tangled polymer waste, such as nylon or polyethylene terephthalate fibers, which comprises chopping the waste into pieces 15 to 40 mm. mesh size, passing the chopped waste through a charging zone, a compressing screw, and finally an extruder. The charging zone is formed by a vertically-disposed hopper, having two opposed parallel walls and two opposed converging walls. Inside the hopper is a plurality of agitating shafts having tapered fingers that loosen and disentangle the chopped waste. The waste then is compressed to one-fourth to one-fifth its volume and transferred to an extruder where it is melted, degassed and extruded to a predetermined shape.

REFERENCES:
patent: 3108082 (1963-10-01), Riehl et al.
patent: 3652466 (1972-03-01), Hittel et al.
patent: 3959357 (1976-05-01), Tokushige et al.
patent: 3976563 (1976-08-01), Scalco
patent: 4051212 (1977-09-01), Grigat et al.

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