EP 0361763 A2 19900404 - Papermaking filler compositions.
Title (en)
Papermaking filler compositions.
Title (de)
Füllerzusammensetzung für die Papierherstellung.
Title (fr)
Compositions de charge pour la fabrication de papier.
Publication
Application
Priority
GB 8822577 A 19880926
Abstract (en)
A composition for flocculating paper- or boardmaking filler comprises particles of starch, in aqueous suspension, and a flocculating agent, eg. a polyacrylamide. Preflocculated filler for addition to a paper- or boardmaking stock may be prepared by adding such a composition to an aqueous slurry of filler particles, eg. calcium carbonate. The use of particulate starch that is insoluble in water at temperatures normally encountered in the wet-end of a paper- or boardmaking process, in particular temperatures below 35 DEG C, obviates the need for a preliminary solubilisation step. However, the starch is soluble at temperatures encountered in the drying stage of the paper- or boardmaking process, where a starch solution is formed which is distributed through the paper matrix and imparts thereto additional strength.
IPC 1-7
IPC 8 full level
D21H 17/28 (2006.01); D21H 17/37 (2006.01)
CPC (source: EP)
D21H 17/28 (2013.01); D21H 17/37 (2013.01)
Designated contracting state (EPC)
AT DE ES FR IT SE
DOCDB simple family (publication)
EP 0361763 A2 19900404; EP 0361763 A3 19911211; GB 2223038 A 19900328; GB 8822577 D0 19881102; GB 8921192 D0 19891108
DOCDB simple family (application)
EP 89309505 A 19890919; GB 8822577 A 19880926; GB 8921192 A 19890919