Problem to be solved: to provide a method for sterilizing a PET bottle which is easy to adsorb hydrogen peroxide at a low cost and efficiently in a processing time corresponding to a line speed of a packing packaging machine.Solution: after the hydrogen peroxide gas was sprayed on the inner surface of the container, and hydrogen peroxide was adhered to the inner surface of the container beforehand, the light source was irradiated with ultraviolet rays having a wavelength range of 320 to 400 nm passing through the pet material or the like from the opening side, side surface or bottom side of the container (PET), and the pet material was used. An ultraviolet ray is irradiated through a quality or the like, and hydrogen peroxide adhering to the inner surface of the container is activated by ultraviolet rays transmitted through PET material or the like, and then hydrogen peroxide deposited in the bottle is dried and removed.Diagram【課題】過酸化水素を吸着しやすいペットボトルを、低コストで効率よく、かつ充填包装機のラインスピードに見合った処理時間内に殺菌する方法を提供すること。【解決手段】あらかじめ容器内面に過酸化水素ガスを噴霧し、内表面にムラなく過酸化水素を付着させた後に、容器(ボトル)開口側、側面もしくは底面側からPET材質等を透過する波長域320~400nmの紫外線を照射できる光源を用いて、PET材質等を介して紫外線を照射し、PET材質等を透過した紫外線により容器内面に付着した過酸化水素を活性化させ、その後ボトル内の付着した過酸化水素を乾燥除去する。【選択図】図1
