摘要:
A filled composition comprising a substrate, functional filler, and an inorganic additive for reducing the odour of the filled composition, wherein the inorganic additive is present in an amount sufficient to reduce the odour of the filled composition absent the inorganic additive, and related uses, methods and articles of manufacture; and a filled composition comprising surface treated mineral filler to improve UV stability and/or reduce or retard UV induced degradation.
摘要:
La présente invention porte sur l'utilisation d'une solution de cellulose carboxylée dépolymérisée pour préparer une suspension aqueuse de Carbonate de Calcium Précipité (CCP) par extinction d'un matériau contenant de l'oxyde de calcium dans de l'eau puis par carbonatation du lait de chaux ainsi obtenu, ladite solution de cellulose carboxylée dépolymérisée présentant un extrait sec compris entre 25 % et 40 % en poids par rapport au poids total de la solution et ladite cellulose carboxylée dépolymérisée présentant un poids moléculaire compris entre 10 000 g/mol et 40 000 g/mol.
摘要:
A method for producing a film or web in a paper making process, said method comprising the steps of: providing an aqueous solution comprising a microfibrillated polysaccharide, wherein the microfibrillated polysaccharide is any one of a microfibrillated cellulose, nanofibrillated cellulose, and cellulose fibrils or a mixture thereof, having a dry content in the range of from 0.1 to 5.0 weight-%; introducing a filler material into said aqueous solution, wherein the method further comprises the step of forming said filler material directly in the aqueous solution by introducing precursor materials into said solution, whereby said precursor materials react to form the filler material onto or into the fibrils of the microfibrillated polysaccharide; wherein said filler material is formed from gas bubbles of carbon dioxide having a diameter in the range of from 10 to 800 nm.
摘要:
A process for converting gypsum into precipitated calcium carbonate including reacting a mixture comprising gypsum and a seed, a mineral acid, or both with at least one carbonate source, whereby precipitated calcium carbonate is produced in the form of calcite and/or aragonite directly without conversion from a vaterite polymorph. Also, a process for converting gypsum into precipitated calcium carbonate including providing a mixture comprising i) gypsum ii) a seed, a mineral acid, or both iii) at least one additive selected from the group consisting of ammonium sulfate, an organic acid, or an iron material, and reacting the mixture with at least one carbonate source to produce precipitated calcium carbonate in the form of vaterite. The precipitated calcium carbonates having desired and unique compositions, polymorph and crystal size characteristics formed by these processes.
摘要:
A method for forming a thermoplastic composite material in a papermaking machine, wherein the method comprises the steps of: forming an aqueous fiber material suspension; bringing said fiber suspension in contact with at least one additive, said additive being introduced into said fiber suspension, whereby said additive reacts to form a precipitation product onto or into the fibers, thereby forming an intermediate suspension, introducing, after the formation of the intermediate suspension, a plastic material into said intermediate suspension, thereby forming a plastic fiber composite suspension.
摘要:
The present invention provides a twisting paper substrate to be waxed for the production of an opaque waxed paper wrapping, wherein the paper substrate comprises a fibrous base, at least one opacifying additive and at least one binder reducing penetration of wax in the fibrous base during the production of the waxed paper substrate by application of wax on the paper substrate, wherein the difference of opacity of the paper substrate before and after Cobb test according to the rizinus Cobb method on one side to be waxed of the paper substrate is most preferably less than or equal to 8 percent.
摘要:
trata a presente patente de invenção, de um produto a ser utilizado como anti pitch na fabricação de celulose sendo esse o carbonato de cálcio precipitado conhecido como "lama de cal" gerado no sistema de caustificação do processo da indústria da celulose e produto obtido através do mesmo, pertencente ao setor químico, especificamente gerados e o oriundo da caustificação.