新規液体食品用容器PID（Pouch in Dispenser）の微生物に対する保護特性の検討

摘要

We examined the content protection characteristics of the PID (Pouch in Dispenser) when it was used in the usual manner and when it was polluted artificially. When the PID was used in the usual manner, the nozzle was opened, and experiments were carried out with and without air-blowing. The invasion of bacteria into the PID was not detected. Also, no bacteria were detected in the material poured from the nozzle of the PID. When 3 strains of bacteria suspensions were intentionally smeared on the nozzle of the PID, invasion of bacteria was observed. When the PID was wiped with a dirty cloth, no invasion of bacteria into the PID was detected. It may be necessary to label the PID with the instruction that the nozzle should not be touched. The effected of changes in the water activity and pH, and the preservatives used, may also need to be considered, depending on the contents in the PID.%液体食品用容器PID（Pouch in Dispenser）の通常使用rn時，および人為的汚染時における内容物保護特性の検討をrn行った．開封後，静置あるいは風を当てた場合，ならびにrn内容物を注ぎ出した場合も，PIDへの菌の侵入は確認されrnなかった．人為的に菌液を注ぎ口に塗布した場合，供試菌rnが内部に侵入した．乾燥させた布を用いて供試菌を塗布しrnた場合，内部への侵入が確認されなかったことから，清潔rnな乾燥した布で注ぎ口をふいた場合は微生物が侵入する可rn能性ほ低いと考えられた．注ぎ口に触れない注意喚起表示rnや，内容物によっては水分活性，pH等の調整，保存料のrn使用が必要であると考えられた．