Recovery of polyester from scrap by high shear conditions

Details Recovery of polyester from scrap by high shear conditions Recovery of polyester from scrap by high shear conditions

1985-01-22

1986-07-22

Lieberman, Allan M.

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

Synthetic resins

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

521 40, 521 48, C08J 1104, C08J 1106

Patent

active

046020462

ABSTRACT:
A method for the recovery of plastic material such as polyester from scrap material such as photographic film having a polyester base and at least one layer of a macromolecular organic polymer. The process includes mixing small pieces of the scrap material in a solution having a scrap solids concentration level of at least 25 percent by volume. The mixture is subjected to conditions of high shear to remove and comminute the polymer layer to particles of a maximum size particle dimension substantially smaller than the minimum size in the longest dimension of the scrap pieces. The polymer particles are then separated from the remaining pure polyester.

REFERENCES:
patent: 3098046 (1963-07-01), Siggel et al.
patent: 3503904 (1970-03-01), Dietz et al.
patent: 3652466 (1972-03-01), Hittel et al.
patent: 3873314 (1975-05-01), Woo et al.
patent: 3928253 (1975-12-01), Thornton et al.
patent: 4324705 (1982-04-01), Seto et al.

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