Method for producing high dry-strength paper, pulpboard and cardboard

US6616807B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Rainer Dyllick-Brenzinger · Speyer, DE
• Primoz Lorencak · Ludwigshafen, DE
• Hubert Meixner · Ludwigshafen, DE
• Peter G. Baumann · Stuttgart, DE
• Ellen Krüger · Mannheim, DE
• Andreas Stange · Mannheim, DE
• Martin Rubenacker · Altrip, DE

Key dates

• Filing date: Oct 1, 1999
• Grant date: Sep 9, 2003
• Expiry date: Oct 1, 2019

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H23/765
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Paper, board and cardboard having high dry strength are produced by the addition of cationic, anionic and/or amphoteric starch as dry strength agents to the paper stock and drainage of the paper stock with sheet formation in the presence of cationic polymers as retention aids for starch, and cationic polymeric retention aids are used for increasing the retention of dry strength agents comprising cationic, anionic and/or amphoteric starch in the production of paper, board and cardboard.