Method for recovering PVC and urethane foam from commingled trim

Details Method for recovering PVC and urethane foam from commingled trim Method for recovering PVC and urethane foam from commingled trim

1992-10-19

1993-10-19

Watts, Douglas D.

Solid material comminution or disintegration

Processes

With classifying or separating of material

241DIG38, B02C 2314

Patent

active

052538133

ABSTRACT:
A method and apparatus for reclaiming urethane foam and polyvinyl chloride plastic material from composite plastic articles (18). The articles pass through a granulator (23) and pass through a first elutriator (36) where two streams of particles are formed. A denser stream passes to a second elutriator (50) where at its exit (56) substantially pure polyvinyl chloride particles are passed into bin (58). A less dense stream of particles pass to a screen separator (64) where intermediately sized particles are sorted onto conveyor (74) which passes substantially pure urethane foam to baler (76).

REFERENCES:
patent: 3848813 (1974-11-01), Stanczyk et al.
patent: 4036441 (1977-07-01), Basten et al.
patent: 4043513 (1977-08-01), Hoberg et al.
patent: 4044695 (1977-08-01), Mackenzie et al.
patent: 5042725 (1991-08-01), Grimmer

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