EP 0361763 A3 19911211 - PAPERMAKING FILLER COMPOSITIONS
Title (en)
PAPERMAKING FILLER COMPOSITIONS
Publication
Application
Priority
GB 8822577 A 19880926
Abstract (en)
[origin: EP0361763A2] 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)
Citation (search report)
- [Y] US 3640842 A 19720208 - HULLINGER CLIFFORD H, et al
- [A] US 4210490 A 19800701 - TAYLOR JOHN H [GB]
- [AD] GB 1552243 A 19790912 - RIDDLE M C
- [X] TAPPI JOURNAL. vol. 67, no. 2, February 1984, ATLANTA US pages 104 - 108; A.M.SPRINGER ET AL.: 'THE INFLUENCE OF STARCH ON DRAINAGE AND RETENTION IN PAPERBOARD MILL SYSTEMS.'
- [Y] ABSTRACT BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY. vol. 57, no. 11, May 1987, APPLETON US page 1552; O.JOKINEN ET AL.: 'INTERDEPENDENCE OF RETENTION AND FORMATION IN THE MANUFACTURE OF SUPERCALENDERED PAPER' ABSTRACT N.14120
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