7results about "Pretreatment apparatus" patented technology

The present invention relates to thermal or thermo-mechanical treatment of hygroscopic materials to adjust material properties. The present invention relates to an apparatus for modifying hygroscopic materials. The modification apparatus comprises a modification unit (202) and a fluid container (204) coupled to at least one fluid opening (203) via a control valve (205). The modification apparatus is configured to heat the hygroscopic material in the modification unit (202) to extract water from the hygroscopic material and to direct the fluid from the fluid container through the at least one fluid opening (203) into the modification unit (202) in response to opening of the control valve (205). The modification apparatus further comprises a treatment agent (207) that is added to the fluid, such that the treatment agent is absorbed into the hygroscopic material and modifies it. The treatment agent (207) comprises at least one of the following components: preservatives, dyes, pigments, fragrances, deodorants, insecticides, impregnation components, or flame retardants.

The invention relates to methods for preparing modified wood and wood products, including methods to fortify wood by increasing the strength and / or density of wood so as to yield a fortified wood or wood product. The methods can be used to, for example, improve the performance, alter the appearance, and / or improve the durability of wood, and particularly, solid wood. The methods comprise a combination of resin and thermal treatments to yield modified wood and modified wood products.

A synergistic aqueous wood preservative composition comprising a copper compound and penflufen. The copper compounds of the compositions of the invention may be soluble, partially solubilized or micronized particles. The penflufen of the compositions of the invention may be solubilized, emulsified or particulate. The wood preservative compositions of the present invention are surprisingly provided as stable dispersions and confer surprising and unexpected resistance to treated wood and wood products.

A flame retardant cellulose-based product formed from ingredients comprising : (i) a cellulose-based material selected from paper-based material, wood-based material and bamboo-based material; (ii) a brominated phosphate ester of Formula (la), wherein the brominated phosphate ester of Formula (la) is present in an amount of about 5% to about 20 % by weight of the cellulose- based product; and (iii) a melamine resin selected from partially methylated melamine formaldehyde resin, methylated melamine formaldehyde resin, and methylated high imino melamine resin, having a molecular weight above 150 gr / mole, above 180, above 300, above 400, above 500, above 600, above 700 gr / mole, preferably having a molecular weight of about or above 500 gr / mole, wherein the melamine resin is present in an amount of about 10% to about 20% by weight of the cellulose-based product.

An arrangement for feeding wood particles into an impregnating stage of a wood treatment process comprises a feed silo (301, 701), at least one impregnating vessel (305, 601, 602, 603, 703) for receiving wood particles into said impregnating stage, and two or more conveyors (302, 303, 304, 501, 502, 503, 702) between said feed silo (301, 701) and said at least one impregnating vessel (305, 601, 602, 603, 703), for transferring wood particles from said feed silo (301, 701) to said at least one impregnating vessel (305, 601, 602, 603, 703). Each of said conveyors (302, 303, 304, 501, 502, 503, 702) is a compressing conveyor for applying pressure to the wood particles on their way through the respective conveyor.