Global Patent Index - EP 1104495 A4

EP 1104495 A4 20020724 - SELECTIVE RETENTION OF FILLING COMPONENTS AND IMPROVED CONTROL OF SHEET PROPERTIES BY ENHANCING ADDITIVE PRETREATMENT

Title (en)

SELECTIVE RETENTION OF FILLING COMPONENTS AND IMPROVED CONTROL OF SHEET PROPERTIES BY ENHANCING ADDITIVE PRETREATMENT

Title (de)

SELEKTIVE FÜLLSTOFFRETENTION, UND VERBESSERTES KONTROL VON DEN BLATTS-EIGENSCHAFTEN.

Title (fr)

RETENTION SELECTIVE DE COMPOSANTS DE CHARGE ET MAITRISE AMELIOREE DES PROPRIETES DE LA FEUILLE PAR PRE-TRAITEMENT AU MOYEN D'ADDITIFS

Publication

EP 1104495 A4 20020724 (EN)

Application

EP 99926067 A 19990528

Priority

US 9912020 W 19990528

Abstract (en)

[origin: CA2315676A1] A method for increasing retention and drainage of filling components in a paper making furnish in a paper making process comprising the steps of: making a slurry of filling components, treating the slurry with from about 0.003% to about 2.0% by weight based on total solids of a phenolic enhancer to form a pretreated filling components slurry, adding to the furnish the pretreated slurry and adding to the furnish from about 0.003 to about 0.5% by weight based on total solids in the slurry of a polymeric flocculant, whereby retention and drainage of filling components in the paper making furnish is increased. A preferred enhancer is a condensate of phenol and formaldehyde and preferred flocculants contain acrylamide, methacrylamide, and/or N-vinylformamide. The methods provide important benefits in many papermaking applications, in which desirable filling components are retained in the final sheet, while undesirable filling components, such as ink and dye particles present in a recycled papermaking furnish, are not retained.

IPC 1-7

D21H 21/10; D21H 23/76

IPC 8 full level

D21H 21/10 (2006.01); D21H 17/48 (2006.01); D21H 17/67 (2006.01); D21H 17/68 (2006.01); D21H 17/69 (2006.01); D21H 23/76 (2006.01)

CPC (source: KR)

D21H 21/10 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE LI NL PT SE

DOCDB simple family (publication)

AU 4223299 A 20000904; CA 2315676 A1 20001128; CA 2315676 C 20091013; EP 1104495 A1 20010606; EP 1104495 A4 20020724; JP 2002537498 A 20021105; KR 100580306 B1 20060516; KR 20010052133 A 20010625

DOCDB simple family (application)

AU 4223299 A 19990528; CA 2315676 A 19990528; EP 99926067 A 19990528; JP 2000599944 A 19990528; KR 20007007192 A 20000627