1789results about "Pressure impregnation" patented technology

A process for treating a wood substrate with a water-based formulation containing a wax in order to confer water repellency to the substrate comprising the steps of:(a) placing the substrate in a treatment vessel and reducing the pressure in the vessel to remove air in the pores of the substrate;(b) contacting the substrate in the vessel, while reduced pressure is present in the vessel, with the formulation to allow the formulation to flow into said pores, said contacting being carried out at a temperature at or above that required to cause the wax to change into a molten state;(c) applying a positive pressure to the vessel to force the formulation into said pores; and(d) releasing the pressure in the vessel and removing the resultant wood substrate from the vessel.

A method for preserving wood by injecting into the wood a slurry having: particles of a sparingly soluble copper salt, copper hydroxide, or both, wherein the weight average diameter d₅₀ of the particles in the slurry is between 0.1 microns and 0.7 microns and the d₉₈ of the particles in the slurry is less than about 1 micron; a dispersant; and water. The dispersant is anionic or a mix of anionic and non-ionic. Advantageously, less than 20% by weight of the particles have a diameter less than 20 nanometers. Useful copper salts include basic copper carbonate, tri-basic copper sulfate, copper oxychloride, basic copper nitrate, basic copper borate, copper borate, basic copper phosphate, or copper silicate. The slurry most preferably includes copper hydroxide particles. The slurry further advantageously includes at least one organic biocide, wherein at least a portion of the organic biocide is coated on the particles.

A wood preservative includes injectable particles comprising one or more sparingly soluble copper salts. The copper-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Exemplary particles contain for example copper hydroxide, basic copper carbonate, copper carbonate, basic copper sulfates including particularly tribasic copper sulfate, basic copper nitrates, copper oxychlorides, copper borates, basic copper borates, and mixtures thereof. The particles typically have a size distribution in which at least 50% of particles have a diameter smaller than 0.25 μm, 0.2 μm, or 0.15 μm. At least about 20% and even more than 75% of the weight of the particles may be composed of the substantially crystalline copper salt. Wood or a wood product may be impregnated with copper-based particles of the invention.

Soluble copper(I)-amine complexes, particularly copper(I)-ammonia complexes and copper(I)-monoethanmolamine complexes, are useful injectable wood preservatives. Wood treated with the copper(I)-amine complexes contains less amines, and is less corrosive to metals, than woods treated with the prior art copper(II)-amine complexes. A method of preparing an aqueous wood preservative that includes soluble copper(I) complexes comprises reacting a solution comprising a copper(II)-amine complex with metallic copper to form a copper(I)-amine complex. One aspect of the invention comprises injecting a solution comprising a copper(I)-amine complex into wood and allowing the copper(I)-amine complex to precipitate within the wood.

A composition for treating cellulosic materials is provided. The composition comprises a dispersion of micronized additives. The dispersion comprises additive particles with diameters in the range of 0.001 to 25 microns. Also provided is a method for the application of the additive-containing composition to wood, as well as wood products which have been treated with the composition.

The invention provides a method for processing fire retarding wood with microwave. The method comprises the following steps: heating and processing wood through microwave; subjecting to vacuum pressure treatment; soaking the wood in flame retardant solution with mass ratio being 5-50% and under the atmospheric pressure of 0.1-10MPa for 3-720 minutes; subjecting to vacuum pressure treatment; and heating and treating through microwave to obtain the fire retarding wood. Since heat is not conducted from the outer part of the wood, but in the wood through the interaction between the microwave alternative electric field and water molecules, so as to quickly raise the whole temperature of the wood and improve the permeability of the heat, and meanwhile, kill bristletails and ova in the wood, improve the distribution state of flame retardant in the wood, and enable the flame retardant not to be segregated in-situ along with the migration of the solution, thus basically solving the problems with the traditional method that the flame retardant is present in large amounts on the surface of the wood and serious segregation occurs to the flame retardant when the fire retarding wood is treated. In addition to microwave heating, no additional heat energy is consumed. The fire retarding wood can be directly used as architectural decorative materials.

The invention discloses a strengthening and flame retardant integrated modified processing method for artificial forest wood and modified artificial forest wood prepared thereby. The method adopts a low molecular weight water-solubility melamine modifying urea-formaldehyde resin solution to compound a flame retardant for dipping the artificial forest wood, comprising the following steps: firstly preparing the melamine modifying urea-formaldehyde resin solution; adding borate to the resin solution for preparing a compound modifier for dipping; then dipping the soft artificial forest wood to ensure that the wood fully absorbs the modifier; and finally drying the dipped wood to obtain the strengthened and flame-retardant processed wood. Because the resin is solidified in the wood, the strengthened and flame-retardant processed wood prepared in the method has the advantages of weight increment and enhanced physical properties including density, size stability, rigidity, strength and the like; meanwhile, because the flame retardant contained in the resin can be uniformly distributed and fixed in the wood, and has strong loss resistance, the processed wood has favorable flame resistance.The processed wood can be extensively applied to the industries of architecture, furniture, interior decoration and the like.

Methods for esterifying hydroxyl groups in cellulose, hemicellulose, and lignin in wood are described, wherein the wood is chosen from loblolly, slash, shortleaf, longleaf or radiata pines. Methods can include solvent drying techniques and heating provided by electromagnetic radiation, such as microwave, and radiofrequency. Products made from the methods are described that have greater decay resistance and dimensional stability as compared with non-esterified wood products.

The present invention provides compositions which can be used to preserve and color wood, as well as methods of using the solution to both preserve and color wood. The composition is an alkaline solution which comprises one or more metal compounds or metal complexes and one or more cationic dyes

The invention discloses enhanced high-temperature heat treated wood and a manufacturing method thereof. The manufacturing method comprises the following steps that 1, high-temperature heat treatment is performed, wherein man-made forest wood serves as raw materials, and high-temperature heat treatment is performed on the man-made forest wood to obtain heat treated wood; 2, impregnation enhancing treatment is performed, wherein the heat treated wood obtained by the step 1 is impregnated in resin adhesives to obtain impregnated wood; 3, solidification forming treatment is performed, wherein solidification forming treatment is performed on the impregnated wood obtained by the step 2 to obtain the enhanced high-temperature heat treated wood. According to the manufacturing method, not only can the mechanical properties of the wood be improved, but also the size stability of the wood can be improved, green and environmental protection are achieved, and the prepared enhanced high-temperature heat treated wood takes the man-made forest wood as the raw materials and is high in mechanical strength and good in size stability.

A flame-retarding agent for wood or wooden products is prepared from amino phosphate, boron compound, polyphosphate and phosphate through thermal reaction between amino phosphate and boron compound, thermal reaction between polyphosphate and phosphate, and preparing finished product. It is applied to wood or wooden products through loading wood or wooden products in the treating tank, vacuumizing, filtering said flame-retarding agent, pressurizing, releasing pressure, discharging flame-retarding agent, and repeating above said steps 1-3 times.

The invention discloses a manufacturing method of flame retardant solid composite floors. The method comprises steps of: performing flame retardant treatment on a natural rare tree veneer with the thickness of 0.5mm to 5mm by a vacuum pressure impregnation method, adhering the dried veneer to a glued floor substrate, and performing the processes of assembling, cold pressing, thermal pressing, health preserving, edge cutting, sanding, mortising and the like to obtain the solid composite floor blank; and then performing painting treatment on the surface of the solid composite plate blank, wherein the painting treatment adopts a process of twelve bottoms and two surfaces and the painting is performed according to the order: water primer, putty, elastic primer, wear resistant primer, transparent primer, sander, wear resistant primer, hardening primer, transparent primer, wear resistant primer, hardening primer, transparent primer, sander, finishing paint and finishing paint, and the wear resistant primer, the hardening primer and the sander are added with flame retardant agent. The flame retardant solid composite floor manufactured by the method has excellent flame retardant and fireproof performance and eco-friendly performance, and has excellent physics mechanical properties.

The invention relates to a preparation method for composite inflaming retarding core-board. The technology of filling a flame retardant by secondary vacuumizing/pressurizing is employed to lead the flame retardant to be more sufficiently dipped into the inside of a core-board strip and improve the inflaming retarding performance of the core-board strip. The flame retardant employs a non-halogen water-base environmental-friendly compound flame retardant which does not contain formaldehyde, has strong inflaming retarding performance, smoke inhibiting and mould-proof effects. The invention is a manufacture method for employing the low-grade wood or leftover materials after processing like undersized logs and removing the quality and processing defects to produce high-grade composite inflaming retarding core-board. The product of the invention has the characteristics of inflaming retarding, corrosion resistance, environment protection, heat preservation, sound isolation, and easy processing, and is an ideal fire-proof inflaming retarding material for the industries like furniture, door manufacture, and building decoration.

The invention discloses an ammonium polyphosphate/SiO2 composite aerogel flame-retardant reinforced timber which comprises a timber and an ammonium polyphosphate/SiO2 composite aerogel in timber pores. The invention also discloses a preparation method of the flame-retardant reinforced timber, which comprises the following steps: pretreating the timber with microwaves to form new flow channels in the timber, thereby enhancing the timber permeability; hydrolyzing the previously prepared ammonium polyphosphate and silicon source by pressure dipping treatment, and introducing the generated uniform sol solution into the timber; and carrying out condensation reaction and normal-pressure drying to generate the ammonium polyphosphate/SiO2 composite aerogel in the timber pore structure in situ. The ammonium polyphosphate/SiO2 composite aerogel flame-retardant reinforced timber has favorable flame-retardant and smoke-inhibition functions, and can effectively prevent the flame retardant from loss. The composite aerogel in the timber pores has the effect of enhancing wear resistance and corrosion resistance. The method can be widely used in flame retardancy, reinforcement and corrosion resistance of the solid wood or composite wood, has the advantages of feasible technical process, cheap raw materials and favorable effect, and is worthy of popularization.

An aqueous wood-injectable particular-based wood preservative comprising: 1) dispersants in an amount sufficient to maintain biocidal particles in a stable slurry; 2) injectable sub-micron biocidal particles comprising a solid phase of at least one of a sparingly soluble organic biocide, a sparingly soluble copper salt, copper(I)oxide, a sparingly soluble zinc salt, zinc oxide; a sparingly soluble nickel salt; and a sparingly soluble tin salt, wherein less than 2% by weight of the biocidal particles have an average diameter greater than 1 micron, and at least 20% by weight of the biocidal particles have an average diameter greater than 0.08 microns; and 3) at least one pigment particle or dye in an amount sufficient to impart a discernable color or hue to the wood, when compared to wood treated with the same particulate system but without the pigment.

The invention discloses a method for modifying wood by filling grafted cell walls with organic monomers and polymerization-filling cell cavities, which relates to a wood modification method. The invention solves the problem of difficulty in simultaneously enhancing mechanical properties and durability of wood in the existing wood modification method. The method comprises the following steps: 1, preparing organic acid anhydride solution; 2, soaking the wood with the organic acid anhydride solution; 3, filling grafted wood cell walls with organic acid anhydride by heating; 4, preparing the organic polymerizable monomer solution; 5, soaking the wood with the organic polymerizable monomer solution; and 6, carrying out polymerization-filling on the wood cell cavities with the monomers by heating. Since organic function micromolecules firstly enter the wood cell walls, the method realizes filling and bonding and eliminates a great deal of hydroxyl groups in the cell walls, thereby enhancing wood durability; and the wood cell cavities are soaked by the organic polymerizable monomers to initiate the polymerization and realize the filling of the cell cavities, so that the wood has higher mechanical properties and durability.

The invention relates to a production method of a high-temperature heating modified rubber wood floor, wherein rubber wood is sawn into wood beams or billets, the wood beams or billets are subjected to insect and termite prevention treatment, drying, carbonization and wood conditioning, the stress and the water content are balanced, and subsequent processing is conducted to obtain the rubber wood floor. The rubber wood is subjected to high temperature heating modified treatment and termite prevention treatment, the manufactured carbonized rubber wood floor is stable in size and excellent in stability and can resist corrosion by moths and termites, the produced carbonized rubber wood solid floor can be used indoors in both the humid south and the dry north, the problem that the solid floor is not easily made in a large width from the rubber wood is solved, and the additional value of the rubber wood is increased. Meanwhile, due to the adoption of the process of subdividing a sheet after carbonizing the wood beams, the problems of large the bending deflection, large reserved allowance in the thickness direction and large loss, resulting from the fact of direct drying and carbonizing of the sheet, can be solved, and the outturn percentage is increased.

The invention relates to a manufacturing method for fluorescent transparent magnetic wood. The manufacturing method for the fluorescent transparent magnetic wood aims to solve the problems that existing wood is not transparent and does not have magnetism or the fluorescence property. The manufacturing method for the fluorescent transparent magnetic wood comprises the steps that firstly, lignin of wood is eliminated; secondly, fluorescent magnetic nanoparticles are prepared; and thirdly, the fluorescent transparent magnetic wood is manufactured and obtained. The method is used for manufacturing the fluorescent transparent magnetic wood.

A multilayer flameproof synthetic wood is at least three-layer laminated structure with 2 to 20 mm wood sheet and 2 to 20mm flameproof sheet, and the surface of the wood is processed by conventional flame retardant treatment, wherein the wood sheet is next to the flameproof sheet, and the wood sheet and the flameproof sheet are bound by adhesive; and the weight ratios of the flameproof sheet components are 100 to 150kg saw dust or crop hull and stalk with the diameter of 1 to 2 mm,65 to 105kg assisted materials, and 780 to 900kg inorganic salts. The production process comprises the steps of flameproof moth-proof and anticorrosion treatment for wood sheet, drying, splicing, and finishing, coating adhesive on the flameproof sheet and extrusion pressing after the wood sheet and the flameproof sheet are bound, and high frequency drying. The multilayer flameproof synthetic wood is provided with the fireproof, dampproof, anticorrosion, soundproof, and thermal-proof performances, high strength, high impact resistance, excellent toughness, and good persistence, and the synthetic wood can be cut, planed, drilled, and nailed.

The invention relates to a production method for manufacturing sliced veneer by bamboo split recombined bamboo wood and aims to realize that firstly, bamboo splits can be used for manufacturing bamboo veneer decorating materials and bamboo wood utilization rate is increased; secondly, natural-color, carbonized and dyed bamboo splits can be used for manufacturing bamboo veneers and colors of the bamboo veneers are enriched; thirdly, the technical problem of humidifying square timber of the bamboo splits is omitted and procedures are saved. The production method includes steps of 1) manufacturing the bamboo splits; 2) subjecting the bamboo splits to natural-color, carbonized or dyed treatment; 3) drying the bamboo splits; 4) shaping the square timber of the bamboo splits; 5) conditioning the square timber of the bamboo splits; 6) softening the square timber of the bamboo splits; 7) slicing the square timber of the bamboo splits; 8) post processing.