PURPOSE: To contrive an improvement in workability by giving sufficiently stickness to the surface of a roll and knitting performance to a material itself to be kneaded, by keeping settling calcium carbonated, whose surface treatment has been completed, included within a polyvinyl chloride resin composite including asbestos.
CONSTITUTION: Settling calcium carbonate whose surface treatment has been complete is kept included within a composite, in manufacture making a polyvinyl chloride resin composite including asbestos into a sheet by applying the same to a roll. As for the settling calcium carbonate, a particle diameter can be unified, and, therefore, it can be manufactured into a desirous particle diameter through adjustment. The desirous particle diameter is 0.01W2.0μm and as for a surface treatment agent, more than one or two kinds out of resin acid, fatty acid and paraffin are applied.
MAIDA TOMOMASA
SHIBATA HIROSHI
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