PROBLEM TO BE SOLVED: To quickly and easily sterilize preforms.SOLUTION: Multiple preforms (1) formed in the shape of bottomed cylinders are placed on a conveyor (4) and placed in an uneven and side-lying state. These preforms are passed through a chamber (5) for each conveyor. Inside the chamber the preforms are sprayed from both sides of the conveyor with hydrogen peroxide solution (M) in a direction across the conveyor. The sprayed hydrogen peroxide solution is deposited on the inner and outer surfaces of the preforms (1) on the conveyor. Thereafter, superheated steam at 200°C to 500°C under a pressure higher than an atmospheric pressure made from water is sprayed to at least an inside surface of all surfaces including a mouth part (1a) of the preform.COPYRIGHT: (C)2013,JPO&INPIT【課題】プリフォームを簡易かつ迅速に殺菌する。【解決手段】有底筒状に形成された多数のプリフォーム(1)をコンベア(4)上に投入して不揃いな横臥状態にし、これらプリフォームを、コンベアごとチャンバ(5)内を通過させ、チャンバ内ではコンベアの両側からコンベアを横切る方向に過酸化水素水(M)をスプレーし、このスプレーした過酸化水素水をコンベア上のプリフォーム(1)の内外面に付着させ、しかる後、プリフォームの口部(1a)を含む全表面のうち少なくとも内面に、水から作った200℃~500℃の大気圧よりも高い圧力の過熱蒸気を吹き付ける。【選択図】図2
