Method for reclaiming waste thermoplastic resin film

Details Method for reclaiming waste thermoplastic resin film Method for reclaiming waste thermoplastic resin film

1981-08-14

1983-04-12

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

134 10, 134 251, 134 255, 134 34, 521 465, 521 47, B08B 312

Patent

active

043797245

ABSTRACT:
Waste thermoplastic resin film is cleaned to reclaim raw material for subsequent recycling by crushing a mass of the waste film into pieces and then feeding the pieces onto a moving mesh conveyor immersed in a wash tank which is filled with a cleaning liquid; the liquid being at a temperature sufficient to soften the pieces. Cleaning is promoted by irradiating the pieces on the conveyor with ultrasonic energy from positions located on opposite lateral sides of and just above the upper surface of the conveyor while simultaneously forcing liquid in the tank to flow in the same direction as the conveyor while directing jets of additional liquid into the tank in the opposite direction to produce a forced circulatory flow pattern within the tank.

REFERENCES:
patent: 2845077 (1958-07-01), Branson
patent: 3222221 (1965-12-01), Branson
patent: 3849196 (1974-11-01), Halloway et al.
patent: 4045243 (1977-08-01), Wohlert
patent: 4073661 (1978-02-01), Buzga et al.
patent: 4131483 (1978-12-01), Iwahashi et al.
patent: 4311157 (1982-01-01), Jubenville et al.

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