PROBLEM TO BE SOLVED: To provide a method for sterilizing a paper container for an aseptic filling machine capable of easily and surely sterilizing microorganisms such as bacteria introduced into paper and paper powder in the paper container for the aseptic filling machine.SOLUTION: A method for sterilizing a paper container for an aseptic filling machine including: an enclosing step of enclosing the paper container for the aseptic filling machine in an enclosing container in which ethylene oxide can flow； an adsorption step of exposing the enclosing container in which the paper container for the aseptic filling machine is enclosed to ethylene oxide to cause the ethylene oxide to be adsorbed to paper constituting the paper container for the aseptic filling machine； a sterilization step of sterilizing the paper container for the aseptic filling machine by the ethylene oxide adsorbed to the paper of the paper container for the aseptic filling machine； and a dispersion step of dispersing the ethylene oxide until a residual amount of the ethylene oxide in the paper container for the aseptic filling machine is 400 μg or less per g of the paper container for the aseptic filling machine.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】無菌充填機用紙容器の紙中及び紙粉に取り込まれた菌等の微生物を簡便に確実に殺菌する。【解決手段】無菌充填機用紙容器をエチレンオキサイドが流入可能な封入容器に封入する封入工程と、無菌充填機用紙容器が封入された封入容器をエチレンオキサイドに暴露し、無菌充填機用紙容器を構成する紙にエチレンオキサイドを吸着させる吸着工程と、無菌充填機用紙容器の紙に吸着されたエチレンオキサイドにより無菌充填機用紙容器を殺菌させる殺菌工程と、無菌充填機用紙容器の前記エチレンオキサイドの残留量が無菌充填機用紙容器１ｇ当たり４００μｇ以下となるまでエチレンオキサイドを気散させる気散工程を無菌充填機用紙容器に対して行う。【選択図】図５
