INORGANIC ANTIMICROBIAL AGENT, ANTIMICROBIAL MOLDED RESIN ARTICLES USING THE SAME AND PROCESS FOR THE PRODUCTION THEREOF

摘要

An antimicrobial agents containing a thermoplastic resin and organic microbial particles dispersed in the resin and having the content of inorganic particles showing a shape factor 2 of 200 or below (SF2: defined as SF2=100piL2/(4A), wherein L represents the peripheral length of a plane image of an inorganic antimicrobial particle confirmed by observing a section of the inorganic antimicrobial particle under a scanning electron microscope; and A represents the area of the plane image) calculated in accordance with the following formula of 80% or more: content (%)=100 x (number of inorganic antimicrobial particles showing SF2 of 200 or below)/(number of all inorganic antimicrobial particles employed in calculating SF2). When the inorganic antimicrobial agent is dispersed in a base resin of an antimicrobial molded resin article, the dispersibility of the inorganic antimicrobial particles can be improved owing to this structure wherein the inorganic antimicrobial particles are dispersed in the thermoplastic resin. In this inorganic antimicrobial agent, moreover, aggregation and uneven distribution of the inorganic antimicrobial particles in the thermoplastic resin are sufficiently prevented and thus the inorganic antimicrobial particles are uniformly dispersed in the thermoplastic resin.