EP 0790351 A3 19990506 - Papermaking process using multi-polymer retention and drainage aid
Title (en)
Papermaking process using multi-polymer retention and drainage aid
Title (de)
Verfahren zur Papierherstellung mittels Multipolymerrückhaltungs-/Entwässerungshilfsmittel
Title (fr)
Procédé de fabrication de papier à l'aide d'un agent de rétention et d'égouttage multipolymère
Publication
Application
Priority
US 60160196 A 19960214
Abstract (en)
[origin: EP0790351A2] The claimed invention comprises a papermaking process comprising forming an aqueous cellulosic papermaking slurry, adding to the slurry a mineral filler, adding to the slurry after the addition of the mineral filler a cationic polymeric coagulant, then adding to the slurry an effective flocculating amount of a high molecular weight anionic polymer selected from the group consisting of acrylamide/sodium acrylate copolymers and copolymers of acrylamide and acrylamido methyl propyl sulfonate (AMPS), adding a low molecular weight anionic polymer selected from the group consisting of polyacrylic acid and methacrylic acid, draining the slurry to form a sheet, and drying to form a paper sheet.
IPC 1-7
IPC 8 full level
D21H 21/10 (2006.01); D21H 23/76 (2006.01); D21H 17/37 (2006.01); D21H 17/43 (2006.01); D21H 17/45 (2006.01); D21H 17/67 (2006.01)
CPC (source: EP)
D21H 21/10 (2013.01); D21H 23/765 (2013.01); D21H 17/375 (2013.01); D21H 17/43 (2013.01); D21H 17/455 (2013.01); D21H 17/67 (2013.01)
Citation (search report)
- [A] US 5266164 A 19931130 - NOVAK ROBERT W [US], et al
- [A] US 5185062 A 19930209 - BEGALA ARTHUR J [US]
Designated contracting state (EPC)
DE FI GB NL SE
DOCDB simple family (publication)
EP 0790351 A2 19970820; EP 0790351 A3 19990506; DE 790351 T1 19980129
DOCDB simple family (application)
EP 97300969 A 19970214; DE 97300969 T 19970214