Invention Grant
- Patent Title: Process for the production of paper
- Patent Title (中): 生产纸张的过程
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Application No.: US11302941Application Date: 2005-12-14
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Publication No.: US07955473B2Publication Date: 2011-06-07
- Inventor: Fredrik Solhage , Joakim Carlén , Birgitta Johansson
- Applicant: Fredrik Solhage , Joakim Carlén , Birgitta Johansson
- Applicant Address: NL Arnhem
- Assignee: Akzo Nobel N.V.
- Current Assignee: Akzo Nobel N.V.
- Current Assignee Address: NL Arnhem
- Agent Robert C. Morriss
- Main IPC: D21H17/42
- IPC: D21H17/42 ; D21H17/44 ; D21H17/68 ; D21H21/10
Abstract:
The present invention relates to a process for producing paper which comprises: (vii) providing an aqueous suspension comprising cellulosic fibres, (viii) adding to the suspension after all points of high shear: a first polymer being a cationic polymer having a charge density above 2.5 meq/g; a second polymer; and a third polymer being an organic or inorganic anionic polymer; and (ix) dewatering the obtained suspension to form paper.
Public/Granted literature
- US20060130991A1 Process for the production of paper Public/Granted day:2006-06-22
Information query
