Process for sanitizing post-consumer paper fibers using heat and hydrogen peroxide

US5900111A · kind A · utility

Assignee

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

Inventors

• Tommy Nystrom · Lund, SE
• Hyder Ali · Cupertino, US
• Fritz Lembke · Erligheim, DE

Key dates

• Filing date: Oct 21, 1997
• Grant date: May 4, 1999
• Expiry date: Oct 21, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/64
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for sanitizing post-consumer wastepaper fibers for liquid packages and containers, a paper product for food packaging and a liquid food container. The process comprises providing paper fibers from a wastepaper recycle process, adding water to the paper fibers to achieve a slurry, de-watering the slurry to obtain a paper fiber stream and passing the fiber stream through a mixing device while heating the fiber stream and supplying hydrogen peroxide in the mixing device.