Conductive polyacetal composition exhibiting improved flexibility and toughness

摘要

A method of producing a tubular shaped article in which an electrically conductive polyacetal resin molding composition comprising an oxymethylene polymer containing at least 50% - OCH2- units and an electrically conductive carbon black is subjected to injection molding or extrusion molding to form said tubular shaped article, characterised in that the composition comprises 75 to 85% by weight of the polyacetal resin, the polyacetal resin has a melt index of 5.0 to 9.0 g/10min measured in accordance with ASTM D1238-82, the composition comprises 2 to 5% by weight of the carbon black, the carbon black has a surface area BET(N2) greater than 1,200 square meters per gram and a pore volume DBP absorption greater than 500 cubic centimeters per 100 grams, and the composition comprises 5 to 20% by weight of an elastomeric polyurethane.