低エネルギー電子ビームによるペットボトル滅菌技術;低エネルギー電子ビームによるペットボトル滅菌技術;Low Energy Electron Beam Sterilization Process for Plastic Drink Containers

Two diŠerent types of compact low energy electron emitters have been developed for the sterilization of plastic drink containers. One is called ITB (In the bottle), and has an electron window of 10 mm in diameter at the nozzle end and can irradiate directly onto interior surfaces of a bottle. The other is called OTB (Outside the bottle), and has 400 mm length electron window for irradiating outside the bottle. Using low electron energy below 150 kV the harmful eŠect of containers being aŠected by thermal distortion, charging and fragrance, etc. can be avoided. We present dosimetric mapping of both emitters for plastic container. The measured values of the dose ranged from a few to several tenths of kGy. These experimental indicates that it helps to provide the information about process parameters and dose of emitters veriˆed experimentally are found to be suitable for a sterilization system. The compact size and the light weight of low energy emitters have also advantages for sterilization system of the plastic container.