Global Patent Index - EP 1918455 A1

EP 1918455 A1 20080507 - Method of producing paper and board

Title (en)

Method of producing paper and board

Title (de)

Herstellungsmethode für Papier und Karton

Title (fr)

Procédé de fabrication de papier et de carton

Publication

EP 1918455 A1 20080507 (EN)

Application

EP 06396017 A 20061031

Priority

EP 06396017 A 20061031

Abstract (en)

The present invention relates to a method of producing a fibrous paper or cardboard web as well as to novel paper and board products. According to the method, the web is produced on a paper or cardboard machine from an aqueous furnish containing fibres mainly derived from a deciduous tree species, fillers and any conventional additives. The fibres are admixed in the furnish with a polyelectrolyte complex before adding the fillers and any additives. With the invention, fibre and paper properties can be improved in combination with reduced energy consumption for refining. Furthermore, filler content can be increased while maintaining or even improving strength properties.

IPC 8 full level

D21H 17/20 (2006.01); D21H 17/33 (2006.01); D21H 21/20 (2006.01); D21H 23/04 (2006.01)

CPC (source: EP)

D21H 17/20 (2013.01); D21H 17/25 (2013.01); D21H 17/28 (2013.01); D21H 17/33 (2013.01); D21H 17/675 (2013.01); D21H 21/20 (2013.01); D21H 23/04 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family (publication)

EP 1918455 A1 20080507; RU 2007139692 A 20090510

DOCDB simple family (application)

EP 06396017 A 20061031; RU 2007139692 A 20071029