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.: US14328146Application Date: 2014-07-10
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Publication No.: US09562327B2Publication Date: 2017-02-07
- Inventor: Fredrik Solhage , Joakim Carlen , Birgitta Johansson
- Applicant: AKZO NOBEL N.V.
- Applicant Address: NL Arnhem
- Assignee: Akzo Nobel N.V.
- Current Assignee: Akzo Nobel N.V.
- Current Assignee Address: NL Arnhem
- Agency: McDonnell Boehnen Hulbert & Berghoff LLP
- Main IPC: D21H17/34
- IPC: D21H17/34 ; D21H17/45 ; D21H17/63 ; D21H17/68 ; D21H21/10 ; D21H23/18 ; D21H17/59 ; D21H17/37 ; D21H17/11 ; D21H23/76
Abstract:
The present invention relates to a process for producing paper which comprises: (i) providing an aqueous suspension comprising cellulosic fibers, (ii) 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 (iii) dewatering the obtained suspension to form paper.
Public/Granted literature
- US20140318727A1 PROCESS FOR THE PRODUCTION OF PAPER Public/Granted day:2014-10-30
Information query
