JP2004525281A5 - - Google Patents

Claims (12)

In a coated fiber web comprising a base layer containing a pigment having a basis weight of 5 to 30 g / m ² and a filler containing a basis weight of 30 to 80 g / m ² on at least one surface,
The base web filler is at least partially composed of fibrils of cellulose or lignocellulose, the fibrils passing through a 50 mesh screen and / or having an average thickness of 0.01-5 μm and an average length of 10-1500 μm The light scattering material particles are precipitated on the fibrils, the light scattering material particles being calcium carbonate, calcium oxalate, calcium sulfate, barium sulfate or a mixture thereof,
Coated fiber web , wherein the filler forms 10 to 100% by weight of the filler of the base web , and the filler content is 17.8 to 22.4% by weight of the fiber material of the base web . 2. The fiber web according to claim 1, wherein the filler has an average thickness of less than 5 [mu] m and contains cellulose or lignocellulose fibrils produced by refining and screening of plant fibers.   The fiber web according to claim 1 or 2, wherein the particles of the light scattering material are inorganic salts that can be formed from the raw material by precipitation in an aqueous solvent.   The amount of particles of the light scattering material is 0.0001 to 95% by weight with respect to the amount of fibrils based on the amount of filler, and is 0.1 to 60% by weight of paper. The described fiber web. The amount of particles of the light scattering material is 0.1 to 90% by weight with respect to the amount of fibrils and 0.5 to 50% by weight of paper based on the amount of filler. The described fiber web. The amount of particles of the light scattering material is 60 to 80% by weight with respect to the amount of fibrils and 0.5 to 50% by weight of paper based on the amount of filler. The described fiber web. Claims characterized in that they are coated with calcium carbonate, gypsum, aluminum silicate, kaolin, aluminum hydroxide, magnesium silicate, talc, titanium oxide, barium sulfate, zinc oxide, synthetic pigments or mixtures thereof. The fiber web in any one of 1-6 . The fiber web according to any one of claims 1 to 7 , comprising coated paper, medium-quality paper, or high-quality paper. A coating layer containing a pigment is applied to at least one side of a base web having a basis weight of 30 to 80 g / m ² containing a fibrous material, and a basis weight of 5 to 30 g is provided on at least one side of the web. In a method for producing a fibrous web according to a method for forming a pigment-containing coating layer of / m ² ,
The base web is formed from a slush of the fibrous material, and a product containing cellulose or lignocellulose fibrils is added to the base web as a filler, and light scattering material particles are deposited on the fibrils. The light scattering particles are calcium carbonate, calcium oxalate, calcium sulfate, barium sulfate or mixtures thereof, and the fibrils pass through a 50 mesh screen and / or have an average thickness of 0.1-10 μm. And corresponds to a fraction having an average length of 10 to 1500 μm,
The filler is, the forms 10 to 100% by weight of the filler of the base web, and the content of the filler, claim 1, which is a 17.8 to 22.4% by weight of the fiber material of the base web The manufacturing method of the fiber web in any one of -8 . The method according to claim 9 , wherein a filler having an average thickness of less than 5 μm and containing cellulose or lignocellulose fibrils produced by refining and screening of plant fibers is used. The method according to claim 9 or 10 , wherein a filler in which at least 80% of the particles of the light scattering material are attached to the fibril is used. 10. The method of claim 9 , wherein the base web is coated with a coating mixture containing a pigment in a paper machine.