52results about "Wood heating" patented technology

A method of treating a cellulose-based material, for example wood and engineered wood is provided, wherein the process involves the following steps: selecting and placing the cellulose-based material in a treatment chamber; impregnating the cellulose-based material with an impregnating agent consisting of an aqueous solution comprising a fluid suitable for esterification; facilitating a hydrolysis process whereby the impregnating agent reacts resulting in the formation of esters and polyesters inside the cellulosed-based material.

A method for forming an engineered veneer block includes stacking a plurality of laminate layers. The method also includes spreading a bonding agent between each layer of the plurality of laminate layers. The bonding agent includes an adhesive. The adhesive consists essentially of one or more no added formaldehyde adhesives. The method also includes slicing an engineered veneer from the engineered veneer block. The engineered veneer has a thickness in the range of 0.1 millimeters to 0.5 millimeters.

The invention relates to the technical field of bamboo processing and modification treatment, and discloses a method for improving high-permeability bamboo modification, which comprises the following steps: preparing a mixed aqueous solution of 9.25-37 mmol / L of alkali compound and 9.3-27.8 mmol / L of persulfate, and dipping bamboo at normal temperature for 3-6 hours; the soaked bamboo wood is heated and activated, and the activation mode is selected from one of 60-80 DEG C constant-temperature water bath treatment, 300-550 W microwave radiation treatment or 100-400 W ultrasonic radiation treatment; and after the activated bamboo wood is cleaned to be neutral, freeze drying is conducted at the temperature ranging from-50 DEG C to-70 DEG C. According to the method, free radicals generated by alkali liquor swelling and synergistic thermal activation of persulfate are utilized, bamboo blocking pore extracts are oxidized and degraded, a fluid conduction path is dredged, the permeability and porosity of the bamboo are improved, the original mechanical strength of the bamboo is kept, and the technical problems that traditional modified liquid medicine is difficult to permeate, and a skeleton is damaged due to strong base treatment are solved.

This invention relates to the field of wood processing technology, and provides a novel method for preparing slicing from the decay and softening of extra-hardwood. The method includes the following steps: immersing a wood sample in a water-filled container, first applying a vacuum, then depressurizing and maintaining the pressure for a period of time to allow liquid water to penetrate the wood cell cavities; heating the immersed sample and applying a vacuum again to cause the liquid water to boil and vaporize; extracting the sample after the bursting treatment with cold and hot water sequentially to remove extractives from the wood and reduce its decay resistance; adjusting the moisture content; treating the sample with brown rot fungi to cause decay and softening on the axial surface of the sample; soaking the sample in water and then freezing it until it is solid, followed by slicing. This invention can successfully produce slicings of extra-hardwood, providing a strong theoretical foundation and technical means for studying the structure of extra-hardwood, predicting its physical and mechanical properties, and improving its high-value-added processing and utilization.

Disclosed is a process for the production of coloured acetylated wood. Herein wood is subjected to a wood acetylation treatment and a wood colouring treatment. The wood colouring treatment comprises subjecting the wood to impregnation with a liquid comprising a colouring agent so as to provide impregnated wood, and subjecting the impregnated wood to a drying process to remove liquid from the impregnated wood by evaporation.

The present invention discloses a method for producing a modified wooden material. Specifically disclosed is a method for producing a modified wooden material, said method comprising: 1) a step for causing permeation, into a wooden material, of a 5-hydroxymethylfurfural (5-HMF) resinification solution containing 5-HMF and an inorganic salt for promoting polymerization of the 5-HMF; and 2) a step for polymerizing the 5-HMF of the permeated 5-HMF resinification solution in the wooden material by means of heating.

This relates to a high-frequency consolidation flow line that sequentially lays down wood. [Solution] The operating equipment includes a preheating section, a high-frequency hot crimping section, and a water-cooled cold crimping wood laying section. The high-frequency hot crimping section includes several high-frequency hot crimping machines, the moving roller tables of each high-frequency hot crimping machine extend from the internal hot crimping work station toward the entrances on both sides and are exposed to the outside, with adjacent externally exposed moving roller tables butting against each other. The water-cooled cold crimping wood laying section includes several water-cooled cold crimping machines, the moving roller tables of each water-cooled cold crimping machine extend from the internal crimping work station toward the entrances on both sides and are exposed to the outside, with adjacent externally exposed moving roller tables butting against each other. The support members are trays placed beneath the wood boards to support them. The flow line is used for the support members by the high-frequency hot crimping section and the water-cooled cold crimping wood laying section, allowing for springback of the wood board thickness.

The invention relates to the field of plywood hot pressing, in particular to an atomization mechanism for a plywood hot press, which comprises a hot press main body, a plurality of hot pressing plates are arranged in the hot press main body, and the atomization mechanism is arranged on one side of the hot press main body. The atomization mechanism comprises an atomization platform, a material pushing mechanism, an atomization mechanism body, a damp clearing mechanism and an adjusting mechanism. According to the scheme, the atomization platform is arranged before the plywood entering the hot pressing plate in the early stage enters, superfine atomization spraying is conducted on the surface of the plywood, the moisture evaporation problem caused by the high temperature of the hot pressing plate before the plywood enters the hot pressing machine can be compensated, the situation that the bonding strength is reduced due to premature drying of a glue layer is effectively avoided, and the hot pressing quality stability is remarkably improved; the material pushing mechanism can sequentially push the plywood into the atomization area and the hot pressing plate from the atomization platform according to the set rhythm, and the plywood can be automatically centered and positioned before entering the atomization area by matching with the adjusting mechanism, so that the plywood obtains consistent and uniform pre-wetting conditions before being fed into the hot pressing machine.

Provided is a method for producing compressed wood, including: an impregnation step of pressure-impregnating a block of wood having a thickness of 3 mm or more with an organic acid aqueous solution containing an organic acid; a drying step of drying the wood, in a wet state, which has been impregnated with the organic acid aqueous solution; a compression step of compressing the wood, which has been dried, while heating to 140 °C or more; and a heating step of heating the wood, which has been compressed, without compression.

The application discloses a kind of damp-proof antibacterial high-density fiber board and preparation method thereof, belong to technical field.The damp-proof antibacterial high-density fiber board includes the following components by weight parts: 30-50 parts modified wood fiber, 20-25 parts adhesive, 10-15 parts nano calcium carbonate, 2-5 parts sodium silicate;The raw material of the application is simple, and the operation process is simple, and the operating condition is easy to control;The damp-proof antibacterial high-density fiber board prepared by the application is stable in nature, and has good damp-proof effect, antibacterial effect, strong practicality, strong adaptability, and is suitable for large-scale production and application.

The invention discloses bamboo bending forming equipment based on a thermal-mechanical coupling principle. Comprising a working table, a feeding station, a preheating station and a heating, bending and shaping station are sequentially arranged on the table top of the working table in the direction from feeding to discharging, a pushing mechanism, a preheating mechanism and a heating and shaping mechanism are correspondingly arranged, and a continuous machining assembly line is formed. The pushing mechanism can adaptively clamp and push bamboo materials with different diameters; the preheating mechanism is used for uniformly preheating the to-be-bent part of the bamboo so as to soften fibers and reduce the brittleness; and the heating and shaping mechanism is used for carrying out segmented heating and synchronous bending on the preheated part and carrying out rapid cooling and shaping by sprinkling water. The cracking risk is reduced through preheating, efficient, high-precision and automatic bending forming of bamboo wood is achieved through the heat-force synchronous effect and instant cooling shaping, the problems that in a traditional technology, the forming quality is poor, labor is relied on, and the product consistency is low are solved, and the method is particularly suitable for batch production of complex bent bamboo components in the field of buildings and furniture.

The plant material may be infiltrated with a solution having a stabilizer and / or a stabilizer precursor. The stabilizers and / or precursors may be absorbed within amorphous and / or hemicellulosic regions of the cell wall of the plant material. After permeation, the amorphous cellulose and / or hemicellulose may be cross-linked with the stabilizer. The stabilizer precursor may include a nucleophilic agent and an electrophilic agent, and the stabilizer may include a reaction product of a nucleophilic agent and an electrophilic agent. Each of the stabilizer and / or the precursor may have a molecular weight of less than or equal to 500 g / mol during permeation. After cross-linking, the stabilizer may impart higher water stability to the plant material, in particular, to limit swelling of the plant material regardless of the duration of exposure to water and / or the amount of water absorbed by the plant material.

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 present application relates to a kind of progressive wood type high frequency compaction assembly line, including operating equipment and bearing component.The operating equipment includes preheating unit, high-frequency hot pressing unit and water-cooled cold pressing wood unit;High-frequency hot pressing unit includes several high-frequency hot presses, and the moving roller of each high-frequency hot press extends from the inside hot pressing station to the import and export of both sides and is exposed, and the adjacent exposed moving roller is butt joint;Water-cooled cold pressing wood unit includes several water-cooled cold presses, and the moving roller of each water-cooled cold press extends from the inside pressing station to the import and export of both sides and is exposed, and the adjacent exposed moving roller is butt joint;Bearing component is the tray that is placed under the wood board and supports wood board.The assembly line is used by high-frequency hot pressing unit and water-cooled cold pressing wood unit, bearing component, changes the technical problem that prior art needs to press plate clamping pressure retention in the process of production line circulation due to up and down, under the premise of allowing wood board thickness rebound, and process step adjustment is limited, and solve rebound problem.

The present application relates to the technical field of wood processing, in particular to a drying method for inhibiting large-section wood cracking. The present application adopts heating softening treatment, modification treatment, modification recovery treatment and drying treatment on sawn timber in sequence to obtain dried wood. If cracks are found during the drying treatment, the modification recovery treatment is continued and the drying treatment is performed again. The drying method of the present application can inhibit both surface cracking and internal cracking of wood, has fewer treatment procedures, low treatment cost, and maintains the mechanical strength of large-section wood containing pith. In the present application, residual stress elimination treatment can be performed on the dried wood to release the residual stress, thereby providing a theoretical basis for obtaining high-quality wood.

The invention discloses pretreatment equipment for efficiently mixing biological enzyme and wood chips, and relates to the technical field of biomass pretreatment, a steam box is of a hollow box type structure, and the bottom end of the steam box is in through connection with a spiral conveying pipe; the quantifying box is of a hollow cylinder structure with a lower opening, the quantifying box is fixed to the supporting base through a supporting plate, and the steam box is located on the left side of the supporting base; the quantifying plate is slidably arranged on the supporting base through a protection assembly, the quantifying plate and the quantifying box are arranged in a matched and abutting mode, and a plurality of quantifying grooves are formed in the quantifying plate at equal intervals in a penetrating mode; the mixing box is fixed to the supporting base and located on the right side of the quantifying box, and the quantifying plate is movably inserted into the mixing box; the mixing assembly is arranged in the mixing box and abuts against the quantitative plate in a matched mode. And through cooperation of the quantifying box and the quantifying plate, quantitative wood chips enter the mixing box, and the quantitative wood chips make contact with the biological enzyme, so that the mixing efficiency is improved.

The invention relates to a preparation method of a transparent wood packaging film, in particular to a preparation method of a full-bio-based transparent wood film with a full-green process. The technical problems that existing transparent wood is poor in biodegradability, poor in waterproofness, complex in manufacturing process, toxic in reagent and poor in barrier property are solved. The method comprises the steps that after wood is bleached, pores of the wood are filled with a mixed solution of citric acid and sodium carboxymethyl cellulose through vacuum impregnation, and a uniform and compact structure is constructed; the transparency of the transparent wood film is 18%-30%, the haze is 65%-85%, the strength reaches 74-80 MPa, the water vapor transmission rate is (3.5-4.5) * 10 <-10 > g m <-1 > s <-1 > Pa <-1 >, and the transparent wood film has good water resistance and dimensional stability, is biodegradable and can be used in the field of food packaging.

The invention provides a method of producing a piece of delignified wood having a porous structure, said method comprising: chemically treating a piece of natural wood to remove at least 90% of lignin from the natural wood while substantially retaining cellulose-based lumina of the natural wood, thereby producing a piece of delignified wood; after the removing, drying the piece of delignified wood by freeze drying or critical point drying, such that the cellulose-based lumina remain open or unobstructed in a cross-sectional view; and after the drying, further chemically treating the piece of delignified wood to be hydrophobic or resistant to weather or salt water, or forming or depositing a coating on exterior surfaces of the delignified wood. The unique microstructure and composition of the delignified wood can provide advantageous thermal insulation properties, among other advantages described herein.

The present disclosure provides a method of drying and dyeing wood, the method comprising feeding a green wood having a varying moisture content into an oven and drying the green wood in the oven. The residence time of the biomass in the oven and the temperature of the oven are selected according to a time and temperature profile based on the pre-drying moisture content of the biomass to produce dry surface wood having a moisture content of about 15% or less at the dry surface. The method further includes conveying the dried surface wood to a dyeing chamber and directly dyeing all sides of the dried surface wood after the drying. A system for carrying out the method and a dyed wood product produced according to the method are also contemplated.

The invention relates to the technical field of wood processing, in particular to an arc-shaped plate radian adjusting assembly and hot-pressing shaping equipment and method. The equipment aims at solving the problems that in the prior art, stress release is uneven due to temperature drop in the thermoplastic transfer process of wood, and axial sliding of a plate is caused by reverse shear force during strong bending. The equipment comprises a working base station, an assembly box body and a door plate, a bottom heating cavity box with a plurality of electric heating rods I and a mold mechanism with a plurality of electric heating rods II are arranged in the box body, and the electric heating rods are connected with a temperature controller to control the heating temperature; the conveying mechanism comprises a bearing roller, a power transmission roller, a driving motor and an adjusting assembly. According to the equipment, a high-elastic-state temperature window of wood can be maintained at a bending contact point, feeding slippage is prevented through hard mechanical locking, and the equipment is suitable for machining of arc-shaped plates.

The invention relates to the technical field of tenon-and-mortise solid wood semi-finished furniture treatment, and discloses a tenon-and-mortise solid wood semi-finished furniture stabilizing treatment method which comprises the following steps: S1, according to climate data of a furniture target sales area, determining wood target moisture content and target environment temperature and humidity corresponding to the climate data; s2, after being cleaned and fixed, the semi-finished furniture obtained after mortise and tenon splicing is completed is placed in an environment-controllable wood maintenance room, and air flow in the wood maintenance room tends to be uniform; s3, acquiring the current environment temperature and humidity in the wood raising room; judging whether the current environment temperature is in a preset suitable adjustment temperature interval or not; if not, the temperature in the wood cultivation room is adjusted to be within the temperature range suitable for adjustment; the whole process is tightly combined, and while the texture of wood is well kept, the wood is fundamentally endowed with the inherent stability of resisting target environment changes and eradicating cracking deformation.

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.

The invention relates to a mineralized fast-growing wood composite material and a preparation method thereof, and belongs to the technical field of wood modification. The preparation method of the mineralized fast-growing wood composite material comprises the following steps: (1) pretreating untreated poplar; (2) performing vacuum impregnation in a polycation solution; (3) performing vacuum impregnation in a polyanion solution; (4) performing vacuum impregnation in the polycation solution again; (5) adjusting the pH value of the precursor solution to 2-3, magnetically stirring, and then dipping in the precursor solution; (6) cleaning the surface with deionized water, air-drying, and drying in a drying oven until the surface is absolutely dry; and (7) repeating the steps (2)-(6) for several times. According to the modification method, the physical and mechanical properties of the poplar can be improved, the flame retardant property of the poplar can be remarkably improved, and new possibility is provided for high value-added application of the poplar.

A transformation of an existing, conventional southern yellow pine (SYP) lumber pressure treatment plant that previously impregnated wood with non-sustainable chemicals, to using environmentally friendly sodium silicate formulations. The transformation may include adding heated storage tanks for solutions of siliceous solutions and adding a heater to an existing storage tank, installing delivery lines capable of handling high pH, viscous solutions between at least the pre-existing vacuum pressure impregnation tank and the added or existing heated storage tank, a CO2 storage tank with associated vaporizer and a CO2 recovery system, associated lines to and from the pre-existing vacuum pressure impregnation tank and the CO2 storage tank and the CO2 recovery system, pumps for circulating the solutions, and a thermal management system including: insulation and cladding on one or more of the tanks and lines, heat tracing on all level indicators; and insertion of heating coils in working tanks.

The present invention relates to a method and apparatus for treating wood, as well as to the treated wood and uses thereof. The involves the steps of: contacting the wood with a solution containing a carboxylic acid or carboxylic anhydride and a polyol; and subsequently contacting the wood with oil at a temperature of 110 - 160ºC for 30 minutes to 48 hours.

The present invention relates to a method for producing a delignified and densified wood product. The wood is delignified in the form of a veneer using process conditions corresponding to the sulfate process. The wood veneer is subjected to a pre-hydrolysis treatment prior to a process step corresponding to the sulfate process. The invention also relates to a delignified and densified wood product produced using said method. The delignified and densified wood product according to the invention has particularly advantageous strength properties.

The invention provides an innovative method for constructing rich nanopores in wood cell walls within millisecond-level time by combining a flash evaporation Joule heating technology and a two-dimensional MXene controlled release mechanism without any chemical activating agent. The two-dimensional MXene nanosheet is used as a gas release regulation component and is uniformly loaded on the surface of a wood cell wall to form a controlled release layer with high bulk density (10-30mg cm <-2 >). Connecting the wood sample with a flash evaporation Joule heating device, and applying an instantaneous voltage of 100-300V to rapidly rise the temperature to about 700-1100 DEG C; under the action of high temperature, wood cell walls are rapidly pyrolyzed along with instantaneous generation of a large amount of gas, and the preformed MXene controlled release layer effectively limits dissipation of the gas, so that pyrolysis gas is rapidly accumulated in the wood and is efficiently activated, and a rich nano-pore structure is constructed in situ in the cell walls. The prepared activated wood has a developed pore structure and can be widely applied to the fields of supercapacitors, electrochemical adsorbents, catalyst carriers and the like.

The present invention is directed to a process for preparing a delignified and densified wood product. The wood is delignified in the form of veneers, using process conditions corresponding to the Kraft process. The wood veneers are subjected to a pre-hydrolysis treatment before the process steps corresponding to the Kraft process. The present invention also relates to a delignified and densified wood product produced using said process. The delignified and densified wood product according to the present invention has particularly advantageous strength properties.

A plant material can be infiltrated with a solution having stabilizing agent and / or stabilizing agent precursors. The stabilizing agent and / or precursors can be absorbed within amorphous cellulose and / or hemicellulose regions of cell walls of the plant material. After the infiltrating, the amorphous cellulose and / or hemicellulose can be crosslinked with the stabilizing agent. The stabilizing agent precursors can include a nucleophile and an electrophile, and the stabilizing agent can include a reaction product of the nucleophile and the electrophile. During the infiltrating, each of the stabilizing agent and / or the precursors can have a molecular weight less than or equal to 500 g / mole. After the crosslinking, the stabilizing agent can imbue the plant material with improved water stability, in particular, such that swelling of the plant material is limited regardless of a duration of exposure to water and / or an amount of water absorbed by the plant material.

The present application provides a bamboo internal node removal and flattening and shaping production line, which can perform continuous operations of internal node removal, flattening and shaping on whole bamboo with semicircular shape, and can remove the internal node completely without residue, flatten the bamboo piece without cracking and notch, and obtain dry and flat and shaped bamboo piece. The bamboo internal node removal and flattening and shaping production line comprises a self-induction bamboo internal node removal device, a guide device, a flattening device and a microwave drying and shaping device. The self-induction bamboo internal node removal device comprises a machine body, a cutting part and an extension part. The inner gear ring pushing device in the extension part pushes the inner gear ring to rotate around the axis, the star gear rotates, the rack and the extension block move in the radial direction, so that the outer edge of the tray is in contact with the bamboo yellow surface of the bamboo; the cutter body of the bending cutter is in sliding contact with the inner wall of the outer edge of the tray under the action of centrifugal force, and the cutting edge cuts the internal node and the bamboo yellow of the bamboo. The flattening device comprises a workbench, a radial pressing device and a tangential pressing device; the tangential pressing is performed on the thickness surface of the bamboo during the flattening process to prevent longitudinal cracking of the bamboo.