D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 23/14 (2006.01) D21B 1/16 (2006.01) D21H 17/48 (2006.01) D21H 17/66 (2006.01) D21H 23/16 (2006.01) D21J 1/00 (2006.01)
Patent
CA 2131525
2131525 9318227 PCTABS00025 In a process for making board according to the wet method, a stock is prepared from fibres produced from a fibrous raw material, and a binder is added prior to dewatering and pressing. The process is distinguished by adding the binder to the fibres before the preparation of the stock. The binder may be a water-soluble binder which is precipitated and fixed to the fibres by acidification. Acidification may take place in connection with the preparation of the stock or prior thereto as well as prior to the addition of the binder. The binder can be added to the fibres in the blow line from the defibrator for producing the fibres from the fibrous raw material, or it may be added to the fibres before the defibrator.
Flodman Leif
Nordqvist Jan-Erik
Casco Nobel Ab
Swabey Ogilvy Renault
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