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1. (WO2018178518) METHOD FOR PRODUCING PAPER, BOARD OR THE LIKE

Pub. No.:    WO/2018/178518    International Application No.:    PCT/FI2018/050234
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: D21H 11/18
D21H 17/21
D21H 17/33
D21H 17/44
D21H 21/20
Applicants: KEMIRA OYJ
Inventors: LUNDIN, Tom
KARISALMI, Kaisa
SOJAKKA, Heikki
Title: METHOD FOR PRODUCING PAPER, BOARD OR THE LIKE
Abstract:
The invention relates to a method for producing paper, board or the like. The method comprises obtaining a fibre stock comprising lignocellulosic fibres and adding a retention agent system comprising a cationic synthetic polymer to the fibre stock and forming a fibrous web from the fibre stock and drying the web. Microfibrillated non-wood cellulose is added to the fibre stock as a component of the retention agent system and sequentially with the cationic synthetic polymer.