Patent ID: 6500385
Filing Date: 2002-12-31
Classification: B29B,C08J,C09D,Y02P,Y02W

Abstract:
A process for reprocessing powder wastes from a powder coating production to provide a re-usable powder which comprisesa) continuously removing powder coating wastes arising during powder coating production, b) continuously compacting the powder wastes using a press selected from the group consisting of a two roll press and a ring roll press, without completely melting the powder, to provided a sintered product, and c) continuously grinding the compacted sintered product with fresh powder coating to yield a powder composition without passing said powder coating composition through an extrusion process; wherein the powder coating composition has a particle size distribution in which at least 50 percent by volume of the powder particles have a particle size of 20 to 45 &mgr;m and in which a proportion that has a particle size of less than 10 &mgr;m is equal to or less than 15 percent by volume.