Method of recovering photographic film

Details Method of recovering photographic film Method of recovering photographic film

1998-08-25

2000-10-31

Jagannathan, Vasu

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

Synthetic resins

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

521 405, 521 48, C08J 1104

Patent

active

061403784

ABSTRACT:
A method for recycling a photographic film is provided. The method comprises shredding the photographic film into a plurality of fragments to be processed; swelling the fragments to be processed formed in the shredding step by dipping each of these fragments to be processed into hot water; and drying the fragments to be processed swollen in the swelling step by applying an impact frictional striking force to each of these fragments to be processed, peeling layers other than a resin material base of the photographic film, i.e., a protective coat, an emulsion layer, and a base coat layer, from each fragment to be processed and classifying these layers, and grading the resin material base so as to be resin material to be recovered.

REFERENCES:
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patent: 4799954 (1989-01-01), Hochberg
patent: 5323971 (1994-06-01), Nishibori
patent: 5368949 (1994-11-01), Ushimaru et al.
patent: 5475036 (1995-12-01), Hosoyama
patent: 5785259 (1998-07-01), Nishibori
patent: 5871161 (1999-02-01), Nishibori

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