Method of sterilizing a packaging material by means of a sterilizing agent in liquid form

US5356592A · kind A · utility

Assignee

• Tetra Laval Holdings & Finance S.A. · CH

Inventors

• Gyula Balla · Malmö, SE
• Bo Berlin · Staffanstorp, SE

Key dates

• Filing date: Nov 18, 1992
• Grant date: Oct 18, 1994
• Expiry date: Nov 18, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65B55/103
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Method of sterilizing a packaging material with a sterilizing agent in liquid form. The packaging material is discharged in order to eliminate electrostatic surface charged on the packaging material, after which the packaging material is wetted with the sterilizing agent which is applied in an electrostatically charged form to those areas of the packaging material which are to be sterilized. The packaging material with the sterilizing agent, which coalesces to a thin, homogeneous film, is finally heated to drive away the sterilizing agent from the sterilized packaging material.