Global Patent Index - EP 1092064 A1

EP 1092064 A1 20010418 - METHOD FOR MAKING PAPER AND CARDBOARD AND RETENTION AND DEWATERING AGENTS

Title (en)

METHOD FOR MAKING PAPER AND CARDBOARD AND RETENTION AND DEWATERING AGENTS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON PAPIER UND PAPPE, UND RETENTIONS- UND ENTWÄSSERUNGSHILFSMITTEL

Title (fr)

PROCEDE DE FABRICATION DE PAPIER ET CARTON ET AGENTS DE RETENTION ET D'EGOUTTAGE

Publication

EP 1092064 A1 20010418 (FR)

Application

EP 99923647 A 19990601

Priority

  • FR 9901278 W 19990601
  • FR 9807144 A 19980604

Abstract (en)

[origin: FR2779452A1] The invention concerns an improved method for making paper which consists in using as main retention agent a branched polymer prepared in invert emulsion and bentonite as secondary retention agent (dual type system). The two additions are separated by a step for shearing the fibrous suspension (or mass). The invention enables to obtain a highly improved retention and also highly improved dewatering. Moreover, it enables to reduce the bentonite content in the white water.

IPC 1-7

D21H 23/76; D21H 21/10; D21H 23/14

IPC 8 full level

D21H 21/10 (2006.01); D21H 23/14 (2006.01); D21H 23/76 (2006.01); D21H 17/37 (2006.01); D21H 17/68 (2006.01)

CPC (source: EP KR)

D21H 21/10 (2013.01 - EP KR); D21H 23/14 (2013.01 - EP); D21H 23/765 (2013.01 - EP); D21H 17/37 (2013.01 - EP); D21H 17/68 (2013.01 - EP)

Citation (search report)

See references of WO 9963159A1

Designated contracting state (EPC)

AT DE FI FR GB IT SE

DOCDB simple family (publication)

FR 2779452 A1 19991210; FR 2779452 B1 20000811; AT 254693 T 20031215; AU 4043999 A 19991220; CA 2334196 A1 19991209; CA 2334196 C 20080715; DE 69912954 D1 20031224; DE 69912954 T2 20041111; DE 69912954 T3 20100128; EP 1092064 A1 20010418; EP 1092064 B1 20031119; EP 1092064 B2 20090422; EP 1092064 B9 20091021; JP 2002517626 A 20020618; JP 4699608 B2 20110615; KR 100685533 B1 20070222; KR 20010052553 A 20010625; WO 9963159 A1 19991209

DOCDB simple family (application)

FR 9807144 A 19980604; AT 99923647 T 19990601; AU 4043999 A 19990601; CA 2334196 A 19990601; DE 69912954 T 19990601; EP 99923647 A 19990601; FR 9901278 W 19990601; JP 2000552347 A 19990601; KR 20007013706 A 20001204