VERFAHREN UND VORRICHTUNG ZUM MISCHEN VON RUSS UND POLYMERMATERIAL

摘要

PCT No. PCT/GB93/01030 Sec. 371 Date Nov. 15, 1994 Sec. 102(e) Date Nov. 15, 1994 PCT Filed May 20, 1993 PCT Pub. No. WO93/23230 PCT Pub. Date Nov. 25, 1993A loose admixture of polymer pellets and carbon black primary aggregate (together with any other desired fillers) is subjected to a first shear and smear action to incorporate the filler(s) into the polymer and subsequently to additional shear and smear actions to deagglomerate and blend the mixture, all of these actions being carried out at temperatures well below the plasticizing temperature of the polymer so that smearing of the filler(s) into the polymer is facilitated. Each shear and smear assembly is made of similar hammer and anvil components comprising a milling tool acting as a hammer by rotating adjacent an array of stationary pegs acting as anvils. The end face of a milling tool presented to the pegs has oblique surfaces at the downstream ends of its channels and these smear the mixture against the confronting corners of the pegs. Two similar incorporating screws feed their product to a common deagglomerating screw and the product of this is either pelletized to make a feedstock or supplied to calendaring mills and extruders for further processing of the mixture.