PROBLEM TO BE SOLVED: To provide a production method with which an antimicrobial agent for fiber with a specific sharp particle size distribution, excellent product stability, and excellent stability of a treatment bath, is obtainable within a short period of time and without admixture of any abraded matter by using a metal-based antimicrobial agent.SOLUTION: The metal-based antimicrobial agent is subjected to a finely pulverizing and dispersing treatment in an aqueous medium under high pressure of 50 MPa or more by using, as a dispersant, at least one kind selected from a group consisting of an anionic surfactant induced from a compound with a specific structure and a nonionic surfactant with a specific structure.COPYRIGHT: (C)2012,JPO&INPIT【課題】金属系抗菌剤を用いて、短時間で、摩耗物混入なく、特定のシャープな粒度分布を持った、製品安定性、処理浴安定性が良好な、繊維用抗菌剤を得ることができる製造方法を提供する。【解決手段】金属系抗菌剤を、50MPa以上の高圧下、特定構造の化合物より誘導されるアニオン界面活性剤及び特定構造の非イオン界面活性剤の群から選ばれる少なくとも1種を分散剤として、水性媒体中で微粒子化分散処理する。【選択図】なし
