Eka Nobel Ab

Eka Chemicals Ab

Akzo Nobel Chemicals International B.v.

Nouryon Chemicals International B.v.

Metsa Board Oyj

Per Ove Leo Ostensson

Kjell Rune Andersson

Stefan Olof Kuni

Marie-Louise Wallberg

Erik Sanne

Cherryleen Garcia-Lindgren

Sune Wannstrom

Peter Marten Van Der Horst

Erik Lindgren

Joakim Carlen

Hans E Johansson

Marek T Tokarz

Johan Nyander

Bo V Larsson

Sune Wännström

Johnny Yrjans

Pavol Barla

Anna Asplund

Peter Marten Horst Van Der

The present invention relates to a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the filler is substantially free from fibers or fibrils of cellulose or lignocellulose. The invention also relates to a filler comprising calcium salt and a cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the cellulose derivative contains cationic groups.

Filler for papermaking process

The invention relates to a process for the production of paper from a suspension of cellulose containing fibres, and optional fillers, which comprises adding a water-soluble cationic or amphoteric branched acrylamide-based polymer and an anionic aluminium-containing silica sol to the suspension and forming and draining the suspension on a wire.

Process for the production of paper

Aqueous suspensions of colloidal particles, preparation and use of the

Silica sols and use of the sols

In a process for making paper from an aqueous paper pulp, especially a pulp containing bleached/unbleached mechanical pulps or unbleached chemical pulps, a combination of chemicals is added for improving drainage and retention. As drainage-and retention-improving aids are added a cationic polyacrylamide and a sol of colloidal inorganic particles having at least one surface layer of aluminium silicate or aluminum-modified silicic acid.

Papermaking process

Crate

Growing community of inventors

Göteborg, Sweden

Kjell Rune Andersson