EP 1475476 A1 20041110 - Process for improving retention and drainage in the manufacturing of paper, paperboard, cardboard
Title (en)
Process for improving retention and drainage in the manufacturing of paper, paperboard, cardboard
Title (de)
Verfahren zur Verbesserung der Retention und Entwässerung in der Herstellung von Papier, Pappe und Karton
Title (fr)
Procédé permettant d'ameliorer la retention et la drainage dans la fabrication de papier, de carton mince et de carton
Publication
Application
Priority
CL 2003000904 A 20030505
Abstract (en)
The present invention refers to the manufacturing process of paper, paperboard, cardboard and similar products (such as cellulose, fiber cement, etc.) in which, at different points of the wet end of the machine, an enhanced, concentrated, liquid smectite (avoiding herewith the need of an on-site preparation unit) and a natural or synthetic polymer are added. <??>The said retention and drainage agents can be added in any order, thus improving the retention, drainage, formation and drying, without affecting the whiteness and enhancing the physical values of the paper, paperboard, cardboard and other similar products. <??>In view of the problems generated by process of prior art, it has been developed a retention and drainage system, called "TOP DUAL", recommended for the manufacturing of paper, paperboard, cardboard and other similar products, for acid, neutral and alkaline environments, in which basically two products or chemical compositions are added to the paper stock: c) A liquid secondary retention and drainage agent, called VERSINQUI A-250, with which the necessity of an expensive on-site preparation equipment is eliminated and d) A primary retention and drainage agent, called VERSINQUI; <IMAGE>
IPC 1-7
IPC 8 full level
D21H 21/10 (2006.01); D21H 23/18 (2006.01); D21H 23/76 (2006.01); D21H 17/28 (2006.01); D21H 17/37 (2006.01); D21H 17/53 (2006.01); D21H 17/68 (2006.01); D21H 21/18 (2006.01); D21H 21/20 (2006.01)
CPC (source: EP US)
D21H 21/10 (2013.01 - EP US); D21H 23/765 (2013.01 - EP US); D21H 17/28 (2013.01 - EP US); D21H 17/375 (2013.01 - EP US); D21H 17/53 (2013.01 - EP US); D21H 17/68 (2013.01 - EP US); D21H 17/74 (2013.01 - EP US); D21H 21/18 (2013.01 - EP US); D21H 21/20 (2013.01 - EP US)
Citation (search report)
- [XD] US 4753710 A 19880628 - LANGLEY JOHN [GB], et al
- [X] WO 9963159 A1 19991209 - SNF SA [FR], et al
- [X] US 2002195218 A1 20021226 - CHEN GORDON CHENG I [US]
- [X] US 5607552 A 19970304 - ANDERSSON KJELL [SE], et al
- [X] US 2002124979 A1 20020912 - OVENDEN CHERIE [GB], et al
- [X] US 6113741 A 20000905 - KETTUNEN KALLE [FI], et al
- [XD] US 4305781 A 19811215 - LANGLEY JOHN G, et al
- [X] US 4980025 A 19901225 - ANDERSSON KJELL R [SE], et al
- [X] US 2972560 A 19610221 - STILBERT ELMER K, et al
- [X] US 5779785 A 19980714 - PAYTON JAMES [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1475476 A1 20041110; AR 044156 A1 20050824; BR PI0401695 A 20050118; CA 2466312 A1 20041105; CA 2466312 C 20120710; CN 100532717 C 20090826; CN 1576460 A 20050209; HK 1072085 A1 20050812; JP 2004332193 A 20041125; MX PA04003942 A 20070629; US 2004221977 A1 20041111
DOCDB simple family (application)
EP 04076330 A 20040503; AR P040101499 A 20040503; BR PI0401695 A 20040505; CA 2466312 A 20040504; CN 200410055031 A 20040429; HK 05104811 A 20050608; JP 2004137822 A 20040506; MX PA04003942 A 20040426; US 70944304 A 20040505