Petri Silenius (Inventor)

Research output: Patent


A method of manufacturing a fibrous web comprising a filler. According to the method, the filler is fed into the fibre slush and a fibrous web is formed of the filler-bearing fibre slush, and this web is dried at the paper or cardboard machine. The filler used is a composite material which comprises cellulose or lignocellulose fibrils, onto which light- scattering material particles have been precipitated. According to the present invention, the filler is brought into contact with the dispersant before it is mixed into the fibre slush. With this solution it is possible to significantly improve the light-scattering properties of papers and cardboards, without decreasing the retention of the filler.
Original languageEnglish
Patent numberWO2006136651
IPCD21H17/37 D21H17/67 D21H17/69
Priority date23/06/2005
Filing date21/06/2006
Publication statusPublished - 28 Dec 2006
MoE publication typeH1 Granted patent

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