D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 19/38 (2006.01) D01F 1/04 (2006.01) D21H 15/12 (2006.01) D21H 17/63 (2006.01) C01F 11/46 (2006.01)
Patent
CA 2732169
The invention relates to a gypsum -fibre composite product, wherein the gypsum appears as crystals on the surface of the fibre and wherein the gypsum crystals are obtained by contacting calcium sulphate hemihydrate and/or calcium anhydrite and an aqueous fibre suspension. The invention also relates to a process for the preparation of the gypsum -fibre composite product. The composite product can be used as a filler pigment or coating pigment in the production of paper.
Linvention concerne un produit composite gypse-fibre. Selon linvention, le gypse apparaît sous la forme de cristaux à la surface de la fibre et les cristaux de gypse sont obtenus par mise en contact dhémihydrate de sulfate de calcium et/ou danhydrite de calcium et dune suspension aqueuse de fibres. Linvention concerne également un procédé de préparation du produit composite gypse-fibre. Le produit composite peut être utilisé en tant que pigment de remplissage ou pigment de revêtement dans la production de papier.
Ahlgren Jonni
Turkki Tarja
Gowling Lafleur Henderson Llp
Kemira Oyj
LandOfFree
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