Invention Patent
- Patent Title: PRODUCTION OF PAPER, BOARD AND CARDBOARD
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Application No.: CA2034135Application Date: 1991-01-14
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Publication No.: CA2034135A1Publication Date: 1991-07-17
- Inventor: AUHORN WERNER , LINHART FRIEDRICH , LORENCAK PRIMOZ , KROENER MICHAEL , SENDHOFF NORBERT , DENZINGER WALTER , HARTMANN HEINRICH
- Applicant: AUHORN WERNER , LINHART FRIEDRICH , LORENCAK PRIMOZ , KROENER MICHAEL , SENDHOFF NORBERT , DENZINGER WALTER , HARTMANN HEINRICH , BASF AG
- Assignee: AUHORN WERNER,LINHART FRIEDRICH,LORENCAK PRIMOZ,KROENER MICHAEL,SENDHOFF NORBERT,DENZINGER WALTER,HARTMANN HEINRICH,BASF AG
- Current Assignee: AUHORN WERNER,LINHART FRIEDRICH,LORENCAK PRIMOZ,KROENER MICHAEL,SENDHOFF NORBERT,DENZINGER WALTER,HARTMANN HEINRICH,BASF AG
- Priority: DE4001045 1990-01-16
- Main IPC: C08F8/12
- IPC: C08F8/12 ; D21H17/34 ; D21H17/36
Abstract:
Paper, board and cardboard are produced by draining a paper stock, containing un- desirable substances, in the presence of hydrolyzed homo- and/or copolymers of N-vinylformamide having a degree of hydrolysis of not less than 60% and a cationic retention aid. According to the invention, faster drainage and improved retention are obtained compared with the use of known fixing agents.
Public/Granted literature
- CA2034135C PRODUCTION OF PAPER, BOARD AND CARDBOARD Public/Granted day:2001-08-14
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