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OwnerVesa Myllymäki, Reijo Aksela +2inventors
InventorsVesa Myllymäki, Reijo Aksela, Anna Sundquist, Saila Karvinen
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The invention relates to a composite material based on water-insoluble polysaccharide. The composite material includes particles of at least one light scattering material, the surface of which is essentially covered by at least one water-insoluble polysaccharide material. The invention also relates to a method for the preparation of the composite material. Further, the invention relates to a paper and board manufacturing process, in which said composite materials are employed as manufacturing materials. Both highly organic end products with exceptional heat capacities and cheap, high filler end products can be manufactured. The invention also relates to a method for improving retention of light scattering filler material in the manufacture of paper and board.
A composite material comprising a continuous phase of a water-insoluble polysaccharide and particles of an inert material, wherein the inert material is a light scattering material.
A process for producing a composite material comprising a continuous phase of a water-insoluble polysaccharide and particles of an inert material, wherein the process comprises mixing the water-insoluble polysaccharide with an ionic liquid solvent to dissolve said polysaccharide and thereby form a solution, said solution being substantially free of water, organic solvent or nitrogen containing base, and then mixing said dissolved polysaccharide with the particles of the light scattering material at a temperature and for a period sufficient to disperse particles substantially homogeneously therein and thereby form an ionic liquid dispersion, and subsequently separating the composite material from the ionic liquid dispersion as particles, flocs, a monolith, fibers, microspheres, or film.
The use of a composite material comprising a continuous phase of a water-insoluble polysaccharide and particles of an inert light scattering material, wherein said composite material is employed in the manufacturing of paper and board.
The use of composite material comprising a continuous phase of a water-insoluble polysaccharide and particles of an inert light scattering material, wherein said composite material is employed for improving retention of light scattering material in the manufacture of paper and board.
Dependencies are inferred from the claim text.