Method and apparatus for sterilizing preform

Abstract

A preform is easily and speedily sterilized. A number of preforms, each having a bottomed tubular shape, are laid on a conveyer in a scraggly overturned manner, these preforms passes inside a chamber together with the conveyer, and hydrogen peroxide water mist is sprayed from both sides of the conveyer in a direction crossing the conveyer in the chamber, thereby adhering the sprayed hydrogen peroxide water to inner and outer surfaces of the preforms on the conveyer.

1 . An apparatus for sterilizing a preform comprising:
 a conveyer on which a preform, having a bottomed tubular shape, is laid in an irregular lying state;   a chamber provided to a horizontally traveling portion of the conveyer; and   a spray nozzle that sprays hydrogen peroxide water from both sides of the conveyer in a direction crossing the conveyer in the chamber so as to adhere the hydrogen peroxide water to inner and outer surfaces of the preform on the conveyer.