Patent ID: 6436197
Filing Date: 2002-08-20
Classification: B29B,B29K,B29L,C08J,Y02W

Abstract:
A process for removing a coating from a polymeric substrate having a coating thereon, said process comprising the steps of:(a) fragmenting said polymeric substrate into relatively small polymeric substrate particles; (b) delivering said polymeric substrate particles and a fluidizing medium comprising water at a polymeric substrate solids content ranging from about 50 to about 60 percent to a mechanical shearing apparatus equipped with a rotary blade; (c) fluidizing said polymeric substrate particles in said mechanical shearing apparatus; (d) shearing said fluidized particles at a relatively high rate of shear comprising a blade speed of greater than about 800 rpm and a blade tip speed of at least about 10 m/s and by causing particle-particle interaction, particle-mixing blade interaction and particle-solid fixture interaction to substantially remove the coating from the polymeric substrate; and (e) recovering cleaned polymeric particles.