Recovery of polyester from spent film

Details Recovery of polyester from spent film Recovery of polyester from spent film

1995-10-30

1997-09-09

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

521 485, 521 465, 521 425, C08J 1104, C08K 507

Patent

active

056657846

ABSTRACT:
Spent photographic film having at least a polyester base, blue dye, and a polyvinylidene binder layer, and from which the photographic emulsion has been removed, is treated to recover usable polyester. The spent photographic film is heated in cyclohexanone at a temperature sufficient and for a time sufficient to remove both polyvinylidene and dye compounds from the polyester base. The recovered polyester may then be mixed with virgin polyester and extruded to produce a polyester product comprising in part recovered polyester and in part virgin polyester.

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