EP 1047834 A1 20001102 - SILICA-ACID COLLOID BLEND IN A MICROPARTICLE SYSTEM USED IN PAPERMAKING
Title (en)
SILICA-ACID COLLOID BLEND IN A MICROPARTICLE SYSTEM USED IN PAPERMAKING
Title (de)
MISCHUNG AUS KIESELSÄURE UND SAUREM KOLLOID ZU EINEM MIKROPARTIKELSYSTEM FÜR DIE PAPIERHERSTELLUNG
Title (fr)
MELANGE DE SILICE ET DE COLLOIDE ACIDE DANS UN SYSTEME MICROPARTICULAIRE UTILISE EN PAPETERIE
Publication
Application
Priority
- US 9920608 W 19990908
- US 10137998 P 19980922
Abstract (en)
[origin: WO0017450A1] A microparticle system for use as a retention and drainage aid in the production of alkaline and acid paper products comprises a high molecular weight flocculant polymer (6) and a silica-acid colloid blend (7), and optionally a cationic coagulant or a medium molecular weight flocculant (5). The high molecular weight flocculant polymer (6) may be added to the furnish after the fan pump (1) and prior to the pressure screen (2); the silica-acid colloid blend (7) may be added to the furnish after the pressure screen (2), and optionally, the coagulant or medium molecular weight flocculant (5) may be added prior to the fan pump (1). Addition of the microparticle system to the paper furnish improves retention and drainage during the papermaking process and sheet formation. The acid colloid of the silica-acid colloid blend (7) is a polymer or a copolymer of a melamine aldehyde acid colloid.
IPC 1-7
D21H 21/10; D21H 23/02; D21H 17/45; D21H 17/47; D21H 17/51; D21H 17/55; D21H 17/63; D21H 17/68; C02F 5/10
IPC 8 full level
B01D 21/01 (2006.01); D21H 17/00 (2006.01); D21H 17/47 (2006.01); D21H 17/67 (2006.01); D21H 21/06 (2006.01); D21H 21/10 (2006.01); D21H 23/14 (2006.01); D21H 17/49 (2006.01); D21H 17/51 (2006.01); D21H 17/68 (2006.01)
CPC (source: EP)
D21H 21/10 (2013.01); D21H 23/14 (2013.01); D21H 17/49 (2013.01); D21H 17/51 (2013.01); D21H 17/68 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0017450 A1 20000330; AT E326579 T1 20060615; AU 5913399 A 20000410; AU 761790 B2 20030612; BR 9907290 A 20001003; CN 1231639 C 20051214; CN 1287585 A 20010314; DE 69931343 D1 20060622; DE 69931343 T2 20060928; EP 1047834 A1 20001102; EP 1047834 A4 20001213; EP 1047834 B1 20060517; ID 25782 A 20001102; JP 2002526680 A 20020820; NZ 504660 A 20021220
DOCDB simple family (application)
US 9920608 W 19990908; AT 99946808 T 19990908; AU 5913399 A 19990908; BR 9907290 A 19990908; CN 99801858 A 19990908; DE 69931343 T 19990908; EP 99946808 A 19990908; ID 20000962 A 19990908; JP 2000574345 A 19990908; NZ 50466099 A 19990908