17results about "Pressure impregnation" patented technology

The invention relates to a method for producing a wooden composite board, comprising the steps: producing of a raw wooden composite board which has a first side surface, a second side surface which runs parallel to the first side surface, and edge surfaces which connect the side surfaces to one another; applying of a flame retardant-containing liquid at least to the first side surface; and applying of a negative pressure to the second side surface, with the result that the flame retardant-containing liquid is sucked into an edge zone of the raw wooden composite board; and / or applying of a positive pressure to the first side surface, with the result that the flame retardant-containing liquid is pressed into an edge zone of the raw wooden composite board, with the result that the wooden composite board is produced.

This disclosure is directed to methods of separating wood veneer material by property measurements, and thereafter improving the properties of veneer material with property values lower than a target threshold value, until those materials meet or exceed that threshold values. In some aspects of the disclosure, veneer materials are prepared, non-destructively measured, and separated into passing and failing material collections. The failing material collection may then be treated to improve the density and flexural modulus of the material therein. Also disclosed herein are products and materials incorporating the treated veneer materials according to the disclosed methods.

This utility model belongs to the technical field of tree impregnation equipment, specifically relating to a high-efficiency osmotic pressure control device for resin-impregnated reinforced veneer. It includes a base, with a tree impregnation device fixed to its top. A control box, mounted on the top of the base, is located on the front side of the tree impregnation device. The control box and the tree impregnation device are electrically connected via a power cord. A protective component is connected between the bottom of the control box and the top of the base. This protective component protects the control box when not in use and also prevents the power cord from becoming tangled. When the control box needs protection during idle periods, the high-efficiency osmotic pressure control device of this utility model allows the closing plate to be moved to the left by an electric telescopic rod. This causes two guide sleeves to move the control box to the left into a protective box, ensuring the closing plate fits precisely against the opening on the right side wall of the protective box, thus protecting the control box.

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 smoke-suppressing, flame-retardant, formaldehyde-free decorative veneer plywood made of fir wood and its preparation method are disclosed. The method involves impregnating fir veneer with a piperazine aqueous solution, washing, and drying. The treated fir veneer is then impregnated with a 2-hydroxyphosphonic acid-acetic acid aqueous solution, rinsed, and dried to obtain a flame-retardant fir veneer. A flame-retardant adhesive is prepared by mixing flame retardant P-CS-H and polyvinyl acetate emulsion at a mass ratio of 3-7:10. The flame-retardant fir veneer is used as the wood flame-retardant layer, a mixture of the flame-retardant adhesive and flour is used as the flame-retardant glue layer, and reconstituted decorative veneer is used as the surface decoration layer. The plywood is assembled in the following order: surface decoration layer, flame-retardant glue layer, wood flame-retardant layer, flame-retardant glue layer, and surface decoration layer. The plywood is then subjected to cold pressing and hot pressing treatments. This yields a formaldehyde-free decorative veneer plywood with excellent flame-retardant and smoke-suppressing properties.

The utility model provides a kind of wood impregnation pressurizing device;Belong to timber processing field;Its technical key points include impregnation mechanism, the impregnation mechanism includes jar body, the both sides of jar body are fixedly connected with baffle ring, the inside of jar body is equipped with baffle, the both sides of baffle are fixedly connected with net support, two groups of net support are fixedly connected with apron at the end away from baffle, the top side of jar body is uniformly fixedly connected with three valves, the bottom side of jar body is fixedly connected with discharge valve;Adjusting mechanism, the adjusting mechanism includes two groups of adjusting screw rod that are symmetrically rotatably connected between the apron, the outside of two groups of adjusting screw rod is fixedly connected with guide table, two groups of guide table are fixedly connected with jar body;The utility model aims at providing a kind of wood impregnation pressurizing device;For improving the impregnation efficiency of wood.

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.

This invention relates to the field of wood processing technology, specifically a method for processing and preparing wood materials. The invention first involves eliminating permeability barriers in the wood material by removing starch granules from the cell cavities to form continuous permeation channels, followed by drying to a moisture content of 6%–12%. A eutectic solvent is prepared by mixing choline chloride with an organic acid hydrogen bond donor at a molar ratio of 1:2. The eutectic solvent is then impregnated into the wood material using a vacuum negative pressure impregnation process, and held at 65–75°C for 2–4 hours to increase the content of active hydroxyl groups in lignin while ensuring the loss rate does not exceed 8%. A bio-based crosslinking agent is directly added during the impregnation process, resulting in the in-situ formation of a crosslinked network within the cell wall through esterification. After hot-press curing and gradient drying, the eutectic solvent is recovered and recycled. This invention achieves a synergistic improvement in the mechanical properties, dimensional stability, and durability of the wood material, with formaldehyde emissions meeting the requirements of GB18580 standard, and a eutectic solvent recovery rate of not less than 85%.

This invention discloses a solid wood flame-retardant impregnation liquid, a method for preparing impregnated wood, and its irradiation preparation process. The solid wood flame-retardant impregnation liquid, by weight, comprises a P-N-metal ion flame-retardant component, an irradiable curable network-forming component, a smoke-suppressing and char-forming reinforcing component, and water. The P-N-metal ion flame-retardant component includes phytic acid, a nitrogen-containing alkaline component, and a metal ion source. The irradiable curable network-forming component includes a water-dispersible oligomer containing unsaturated double bonds, γ-methacryloyloxypropyltrimethoxysilane, and 2-aminoethyl methacrylate hydrochloride. The preparation process involves a segmented merging process of inorganic dispersion slurry, P-N pre-complexing liquid, and metal ion preparation liquid, followed by pre-irradiation of the impregnation liquid to obtain a stable impregnation system. After drying the solid wood, it is pre-irradiated and activated, then impregnated under vacuum pressure to obtain wet-impregnated wood. Finally, it undergoes electron beam irradiation curing and segmented drying to obtain the finished impregnated wood product. The resulting impregnated wood exhibits good flame-retardant properties.

The application discloses a method for bleaching wood with light-resistant antibacterial property, and belongs to the field of wood modification and technical wood production. The method is used for solving the problems of high cost and easy yellowing of bleached wood under light caused by the use of distilled water in the prior art. The method is as follows: first, tap water is used to prepare a bleaching solution, and African white nauclea diderrup veneers are treated to obtain BAWV; second, a nano-zinc oxide suspension is prepared; a PVA solution is prepared and then transferred to the nano-zinc oxide suspension which has been subjected to ultrasonic treatment; the BAWV is vacuum impregnated, dried, and the bleaching is completed. The method improves the whiteness of the bleached wood. The nano-zinc oxide is dispersed by PVA and loaded on the surface of the bleached veneer, the hydrogen bond effect between the two is utilized to improve the dispersion uniformity of the ZnO and the adhesion of the ZnO on the wood surface, and the light resistance of the wood is significantly improved.

The present application relates to the technical field of wood modification, and discloses a surface layer reinforced plastic wood and a preparation method thereof, which comprises the following steps: (1) soaking wood in an impregnation reagent for impregnation treatment, wherein the impregnation reagent comprises an oxidizing agent and an organic hydrogen bond acceptor; (2) compressing the wood subjected to the impregnation treatment in step (1). The surface layer reinforced plastic wood prepared by the preparation method has significantly improved mechanical strength, controllable and low density, effectively inhibited size rebound, excellent comprehensive performance, and good application prospect.

To provide a method for producing modified wood material with high dimensional stability. [Solution] A method for producing modified wood material, comprising: 1) impregnating an untreated wood material with at least one acid selected from citric acid, malic acid, and glutaric acid, and glycerin to obtain a drug-impregnated wood material; and 2) heating the drug-impregnated wood material obtained in step 1.

This invention provides a method for regulating the assembly of nanosheets on the surface of wood cell walls based on interfacial forces generated by liquid vaporization. By selecting liquids with different interfacial tensions (methanol, ethanol, isopropanol, dimethyl sulfoxide), nanosheets (molybdenum disulfide, graphene, nano-titanium dioxide) are uniformly and controllably loaded onto the surface of natural wood cell walls. During liquid vaporization, interfacial forces drive the assembly of nanosheets on the cell wall surface: low interfacial tension liquids promote the formation of loosely packed structures, while high interfacial tension liquids promote the arrangement of nanosheets into a tight and continuous coating structure. This method achieves precise control over the assembly morphology of nanosheets through simple liquid selection, thereby enabling controllable design of the material's specific surface area, pore size distribution, and channel connectivity. The prepared wood-based functional materials are widely applicable in fields such as environmental remediation membrane materials, supercapacitor electrodes, ion separation membranes, and catalyst supports.

The application discloses wear-resistant and pressure-resistant film-coated bamboo plywood and a preparation method thereof, and relates to the technical field of bamboo plywood. The preparation method comprises the following steps: weaving modified bamboo pieces into bamboo mats, then stacking one bamboo mat on one film-coated paper, stacking one film-coated paper on the bamboo mat, continuously stacking two to four bamboo mats and two to four film-coated papers in sequence, and then carrying out hot-pressing treatment, pressure and temperature maintaining at 50-60 DEG C, sanding and edge finishing after pressure and temperature decreasing, so as to obtain the wear-resistant and pressure-resistant film-coated bamboo plywood; the film-coated paper is prepared from imidazole, phytic acid and itaconic acid-based epoxy resin. The modified bamboo pieces treated by sodium hydroxide, sodium sulfite, diammonium hydrogen phosphate and sodium silicate aqueous solution effectively improve the wear resistance, pressure resistance, flame resistance, mildew resistance and moisture resistance of the bamboo plywood; the introduction of the film-coated paper further improves the wear resistance, pressure resistance, flame resistance, mildew resistance and moisture resistance. Therefore, the application has a wider application prospect.

The present invention relates to the technical field of wood modification, and in particular to a carbon quantum dot-based preparation method for reinforced and toughened wood. The preparation method comprises the following steps: treating a test material with a carbon quantum dot modification solution by means of a vacuum pressure impregnation method; then sealing end portions of wood by means of an end-sealing material, and placing the wood at room temperature for a period of time; and finally, placing the wood in a drying oven or a drying kiln for heating and drying, so as to obtain a carbon quantum dot-modified material. The carbon quantum dot-based preparation method of the present invention is simple, does not yield solid by-products, and takes a short time. In the present invention, carbon quantum dots are used to directly modify wood, the preparation process is simple, the concentration of the modification solution is low, the cost is low, and large-scale popularization and application can be achieved. In the prepared modified material, the absolute value of the crystallinity of cell walls can be increased and cell lumens can be expanded; while ensuring that the overall size and mass of wood do not change greatly, the dimensional stability, strength and toughness of wood are synchronously improved, and the strength-to-weight ratio of wood is improved.

The present application belongs to energy-absorbing shock-absorbing wood with gradient pore structure and its preparation method, and the energy-absorbing shock-absorbing wood comprises at least two layers of wood layers with different pore structures, wherein the porosity of the surface layer wood is 40-50%, the porosity of the intermediate layer wood is 50-70%, and the porosity of the core layer wood is 70-90%; the intermediate layer wood is one layer or several superimposed layers, the core layer wood is one layer or several superimposed layers, and the intermediate layer wood and the core layer wood can be alternately superimposed; the surface layer wood, the intermediate layer wood and the core layer wood can be alternately superimposed. The present application builds the pore gradient from the surface layer to the core by wood modification and gradient design of wood pores, realizes progressive collapse, and optimizes the strength and energy absorption; through the synergistic effect of gradient pore structure and chemical modification, the wood is endowed with high energy absorption, functionalization and controllable shock absorption performance.

This invention discloses a method for preparing controllable degradable archaeological-style wood, comprising the following steps: Step 1, pre-treatment of the wood substrate by low-temperature plasma etching activation; Step 2, impregnation with a composite enzyme degradation solution using a vacuum pressure method; Step 3, segmented temperature-pressure synergistic directional degradation; Step 4, injection of inorganic nanoparticles into the degraded wood for structural fine-tuning; Step 5, impregnation of the wood with a temperature-sensitive polymer solution, utilizing the phase transition principle to block cell wall degradation sites; Step 6, gradient vacuum drying and surface aging treatment. This invention solves the problems of uneven degradation, process loss of control, and low simulation degree of traditional methods. The prepared archaeological-style wood exhibits stable properties, uniform degradation, and a microstructure that highly replicates real cultural relics.