公开(公告)号：CA2576611A1

公开(公告)日：2006-03-16

申请号：CA2576611

申请日：2005-09-08

Applicant: BASF AG

Inventor： LEIFERT PETER ,  BLUM RAINER ,  LEDUC MARC

IPC: D21H21/10

Abstract: Process for the production of paper, board and cardboard by draining a paper stock on a wire with sheet formation and drying of the sheets, the sheet formation being carried out in the absence of finely divided inorganic flocculants and (a) polymers comprising vinylamine units and/or polyvinylformamide having a molar mass Mw of, in each case, at least 1 million and (b) at least one cationic or nonionic polyacrylamide and/or one cationic or nonionic polymethacrylamide having a molar mass Mw of, in each case, at least 2.5 million being used as retention aids.

公开(公告)号：CA2576611C

公开(公告)日：2014-12-23

申请号：CA2576611

申请日：2005-09-08

Applicant: BASF AG

Inventor： LEDUC MARC ,  BLUM RAINER ,  LEIFERT PETER

IPC: D21H21/10

Abstract: The invention relates to a method for the production of paper, paperboard and cardboard by dripping a paper material onto a sieve, by forming sheets and then drying the sheets. The sheets are formed in the absence of fine-particled, inorganic, flocculating agents and the retention agent is used as (a) polymers containing vinylamine units and/or polyvinylformamide having a molar mass Mw of, respectively, at least 1 million and (b) at least one cationic or non-ionic polyacrylamide and/or a cationic or non-ionic polymethacrylamide having a molar mass Mw of, respectively, at least 2.5 million.

公开(公告)号：DE102004044379B4

公开(公告)日：2008-01-10

申请号：DE102004044379

申请日：2004-09-10

Applicant: BASF AG

Inventor： LEDUC MARC ,  BLUM RAINER ,  LEIFERT PETER

IPC: D21H21/10 ,  D21H17/00 ,  D21H17/37 ,  D21H17/44

Abstract: Process for the production of paper, board and cardboard by draining a paper stock on a wire with sheet formation and drying of the sheets, the sheet formation being carried out in the absence of finely divided inorganic flocculants and (a) polymers comprising vinylamine units and/or polyvinylformamide having a molar mass Mw of, in each case, at least 1 million and (b) at least one cationic or nonionic polyacrylamide and/or one cationic or nonionic polymethacrylamide having a molar mass Mw of, in each case, at least 2.5 million being used as retention aids.

公开(公告)号：DE102004044379A1

公开(公告)日：2006-03-30

申请号：DE102004044379

申请日：2004-09-10

Applicant: BASF AG

Inventor： LEDUC MARC ,  BLUM RAINER ,  LEIFERT PETER

IPC: D21H21/10 ,  D21H17/37 ,  D21H17/44

Abstract: Process for the production of paper, board and cardboard by draining a paper stock on a wire with sheet formation and drying of the sheets, the sheet formation being carried out in the absence of finely divided inorganic flocculants and (a) polymers comprising vinylamine units and/or polyvinylformamide having a molar mass Mw of, in each case, at least 1 million and (b) at least one cationic or nonionic polyacrylamide and/or one cationic or nonionic polymethacrylamide having a molar mass Mw of, in each case, at least 2.5 million being used as retention aids.