EP 1642873 A1 20060405 - Method for producing paper comprising multi-phase calcium silicate hydrates
Title (en)
Method for producing paper comprising multi-phase calcium silicate hydrates
Title (de)
Verfahren zur Herstellung von Papier enthaltend multiphasige Calciumsilikathydrate
Title (fr)
Procédé de préparation de papier comprenant d'hydrates de silicate de calcium à phases multiples
Publication
Application
Priority
- EP 00957850 A 20000826
- US 15086299 P 19990826
Abstract (en)
A method for improving sheet stiffness of paper is disclosed, as well as a calcium silicate hydrate mixture useful in such a process. The paper is manufactured by drying a furnish mixture of an aqueous pulp slurry and preselected fillers, the method involving incorporating into the furnish mixture particles of multiple phase calcium silicate hydrate comprising a major component comprised of riversideite and a minor component of xonotlite. The particles have an irregular globular structure, typically with an outside diameter from about 10 to about 30 microns.
IPC 8 full level
C04B 7/34 (2006.01); C04B 33/24 (2006.01); D21H 17/68 (2006.01)
CPC (source: EP)
D21H 17/68 (2013.01); D21H 17/52 (2013.01)
Citation (search report)
- [A] US 3679446 A 19720725 - KUBO KAZUHIKO
- [A] US 4780180 A 19881025 - TAKE TAKAO [JP], et al
- [A] US 4402892 A 19830906 - HELSER JERRY L [US]
- [A] DE 3625254 A1 19870129 - ONODA CEMENT CO LTD [JP], et al
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)
DOCDB simple family (application)
EP 05025956 A 20000826