Method of sterilizing laminated packaging material.

摘要

A method for sterilizing a liquid packaging sleeve-like blank having two open ends and made of a laminated material including a paper layer, includes the steps of sterilizing the blanks (2) by circulating a circulating unit (31) holding a large number of blanks (2) in a sterilizing tank (30) which contains a sterilizing agent, to dip the blanks (2) in the sterilizing agent, and removing the sterilizing agent by circulating another circulating unit (31) holding the large number of blanks (2) in a hot air drying tank (43) in which hot air is blowed, to dry the blanks (2).