Abstract:
The present invention concerns a method for creating a grit pattern on a grindstone. During manufacture the surface of the grindstone is treated by a laser beam.
Abstract:
The present invention relates to a method for treating a food product in order to preserve the product wherein the food product is treated with a solution comprising a nanofibrillated polysaccharide. The invention further relates to a food product being treated with a solution comprising a nanofibrillated polysaccharide.
Abstract:
The invention relates to a process for treating cellulose fibres which process comprises the steps of providing a slurry comprising cellulose fibers, adding anionic polyacrylamide (A-PAM) with high molar mass to the slurry in a first step and subjecting the slurry comprising fibers and A-PAM to a mechanical treatment in a second step thereby forming a composition comprising microfibrillated cellulose. The invention further relates to a composition produced according to the process.
Abstract:
The present invention relates to a method for manufacturing a multiply web composite. The method comprising the steps of mixing natural fibers (2), plastic particles (3) and liquid (4) to form a liquid mixture (10); transporting the liquid mixture to a forming section (6, 7) of a paper machine; transporting a first fiber suspension (11) to the forming section; transporting a second fiber suspension (12) to the forming section; forming a multiply web (13), wherein the first fiber suspension forms a first ply (15), the liquid mixture forms a second ply (16), and the second fiber suspension forms a third ply (17), wherein the second ply is arranged between the first ply and the third ply; and removing liquid from the multiply web to form the multiply web composite, such that, the first and third plies comprising natural fibers and the second ply comprising natural fibers and plastic particles.
Abstract:
The present invention discloses an in-line production method for providing a retention agent into a liquid flow of a stock suspension and into the short circulation of a paper making machine, wherein the method comprises the steps of: (i) providing a liquid flow of a stock suspension; and (ii) feeding at least one additive into said liquid flow of the stock suspension, wherein said retention agent is formed directly in said stock suspension. The at least one additive may be added to the stock suspension e.g. as a liquid flow. The retention agent provided by the method of the invention may further improve the control of the dewatering rate and subsequently the strength properties of the paper. By this method there is provided a way of forming a retention agent directly into the stock suspension. The need of transporting, e.g. a readymade solution of a retention agent is thereby abolished, and thus the retention aid may be formed in a very cost-efficient way. Further as the retention agent is formed directly into the stock suspension it may very quickly and efficiently adhere to the fine particles, or the filler in the stock suspension and thus a more efficient effect may be achieved.
Abstract:
In the present disclosure there is provided a method of producing a high solids content microfibrillated cellulose suspension by passing a precursor material through a homogenizer or fluidizer, thereby reducing the particle size of the precursor material, wherein the precursor material comprises a particulate microcrystalline cellulose, wherein the particles have a natural cellulose based caramelized sugar coating.
Abstract:
The present disclosure relates to athermally reactive thermoplastic intermediate product, in the form of a shaped body, wherein the intermediate comprisesa composition, wherein the composition comprises apurified or optionally unpurified softwood lignin and at least a first additive.
Abstract:
A method for the production of a composite material comprising nanofibrillated polysaccharide, the method comprising the following steps: (i) providing a liquid suspension of the nanofibrillated polysaccharide; (ii) bringing said liquid suspension in contact with at least one additive, thereby forming a composite material suspension, wherein the composite comprises the nanofibrillated polysaccharide and the at least one additive, (iii) increasing the solid contents of said composite material suspension, thereby forming a high solid contents composite material suspension.
Abstract:
The invention relates to a method of deoxygenation of tall oil as well as methods for the production of aliphatic hydrocarbons and polymerizable monomers from tall oil. Sulphurous crude tall oil (5) together with hydrogen gas (6) is fed into a reactor (1) comprising a catalyst bed (2, 3). The oil is catalytically deoxygenated by hydrogen in the bed by use of a sulfided metal catalyst, e.g. a Ni-MoS catalyst. The flow exiting the reactor is cooled down and a hydrocarbon-bearing liquid phase (10) is separated from a gas phase (18), followed by subjecting the liquid phase to distillation (14) for removal of useless aromatic hydrocarbons and then to steam cracking (4) to form a product containing olefins such as ethylene or propylene. By regulation of the deoxygenation temperature to be at least 270°C but less than 360°C the yield is rich in linear and cyclic aliphates that usefully turn to olefins in the steam cracking, while formation of napthalenes is reduced.
Abstract:
The invention relates to a method for isolating xylan from plant material. In the method, cellulose fibres which contain xylan are used, advantageously cellulose fibres from hardwood; and xylan is extracted (20) from said cellulose fibres by means of sodium hydroxide for forming an extract solution (17) that contains xylan; cellulose fibres are removed from said mixture that contains cellulose fibres and extract solution (17), for isolating said extract solution from said mixture; carbon dioxide (14) is added to said extract solution (17) for isolating xylan, wherein liquid brightener (18) and precipitated xylan (12) are formed; calcium hydroxide (16) is added to said isolated brightener (18), for forming precipitated calcium carbonate and liquid sodium hydroxide (15); and sodium hydroxide is removed from said mixture that contains sodium hydroxide and precipitated calcium carbonate, for isolating calcium carbonate from said mixture. Furthermore, the invention relates to a system for isolating xylan from plant material, and to xylan, calcium carbonate, cellulose fibre and use of xylan.