Comminution of plastic scrap

Details Comminution of plastic scrap Comminution of plastic scrap

1989-11-06

1992-10-13

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 21, B02C 1912

Patent

active

051543613

ABSTRACT:
A method for comminuting plastic scrap material wherein the plastic scrap is suspended in water and an antifoam agent is added to the suspension which is then passed through a disc refiner or a Valley beater to comminute the plastic scrap. The antifoam agent is selected from defoamers having an HLB value of from about 0.5 to about 10 and a polypropylene glycol having an average molecular weight of from about 900 to about 1500. The comminuted plastic scrap is useful as an additive to the core material of a gypsum wallboard.

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