PREPARATION OF COMPOSITE ELECTRICALLY-CONDUCTIVE RESIN PELLET

摘要

PURPOSE:To obtain a molded product which is remarkably free from breaks of stainless steel fibers at the stage of a pellet and finally excellent in electric conductivity by kneading thermoplastic resin and special-length chopped strand into which stainless stees fibers having specified diameter and quantity are bound with thermoplastic resin. CONSTITUTION:Stainless steel fiber is suitable for electrically conductive filler on account of height of electric conductivity and corrosion resistance peculiar to stainless steel, etc. The stainless steel fibers with diameters 1-20mum are bound with thermoplastic resin to be used as a chopped strand. This bundle is obtained by arranging 100-100,000 fibers in one direction and cutting them in lengths 2-15mm.. The thermoplastic resin and this chopped strand of stainless steel fibers are mixed and kneaded at the ratio of 60-95 to 40-5wt% into a plate type substance. The plate type substance should have volumetric intrinsic resistance values 10<-2>-10<4>OMEGA.cm when it is measured at 23 deg.C in accordance with the Rubber Association standard.