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77 results about "Oriented strand board" patented technology

Oriented strand board (OSB) is a type of engineered wood similar to particle board, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. It was invented by Armin Elmendorf in California in 1963. OSB may have a rough and variegated surface with the individual strips of around 2.5 cm × 15 cm (1.0 by 5.9 inches), lying unevenly across each other and comes in a variety of types and thicknesses.

Method of manufacturing a fire-retardant treated wood composite panel

A process or method for manufacturing a fire-retardant treated wood composite board or panel, such as oriented-strand board, with a low melting point fire retardant (FR) material, such as boric acid, while the press is operating at typical press temperatures above the FR material melting point. An intervening overlay is applied to the top surface of the mat on the forming line, after the use or application of any FR material within or on the mat, prior to entry into the press. The intervening overlay covers the top surface so as to prevent the melting fire retardant material from contacting the press platen(s). After pressing, the intervening overlay may be removed from the top surface by sanding, buffing, or other methods. The intervening overlay also may be sized so as to extend over one or more edges of the underlying panel, for ease of removal post-process.
Owner:LOUISIANA PACIFIC CORP

Facing oriented strand board paving equipment

The invention relates to the technical field of shaving board production equipment, in particular to facing oriented shaving board paving equipment which comprises a paving roller, a sliding block, a sliding rail and an adjusting assembly. The two ends of the paving roller are rotationally connected to the sliding blocks. The sliding block is slidably connected to the sliding rail. The sliding rail is arc-shaped and takes the midpoint of the axis of the paving roller as the center; the adjusting assembly is connected with the two sliding blocks, and the two sliding blocks can move reversely along the corresponding sliding rails through the adjusting assembly so that the inclination angle of the paving roller can be adjusted and fixed. The high-precision continuous paving device can meet the high-precision continuous paving requirements of wood shavings of multiple specifications.
Owner:GUANGXI YUANFENG NEW MATERIAL CO LTD

Method for manufacturing a reusable concrete formwork board, and concrete formwork board

The invention relates to a method for producing a reusable concrete formwork board and to a concrete formwork board for repeated use in concrete casting. In order to provide a method for producing a concrete formwork board, as well as a concrete formwork board itself, which allow for multiple uses and particularly cost-effective manufacturing, the concrete formwork boards also being suitable for casting fair-faced concrete, according to the invention: firstly, a chipboard or an oriented strand board having two top sides and side faces is provided; and then a two-component, water-based coating composition in liquid form is applied to at least one of the top sides, one component of the coating composition comprising a heat-curable carrier resin and the second component comprising at least one release agent component. Finally, the applied coating composition is cured in a hot press to form a closed coating on the chipboard or oriented strand board.
Owner:SWISS KRONO TEC AG

Manufactured wood panel with integrated inorganic material

A manufactured wood panel with integrated fire-resistant (FR) inorganic material, and methods of production. The manufactured wood panel may be structural or non-structural, and strand-based, such as, but not limited to, oriented strand board (OSB). Noncombustible FR inorganic material, including but not limited to, mineral wool, sand, rock, and the like, is added to and mixed with the wood strands before, during, and / or after the blending process on the production line (i.e., mat forming line). The mats formed from the mixed strands and inorganic material arc then subjected to heat and pressure in a press. The panel may have multiple strand layers, with all or only some of the strand layers comprising the noncombustible material. The percentage of noncombustible material may be the same in all mixed layers, or may vary between layers.
Owner:LOUISIANA PACIFIC CORP

Board bundling device for oriented strand board production

The utility model discloses an oriented strand board production board bundling device which comprises a base, a cabinet body is fixedly connected to the top of the base, two cabinet doors are rotatably connected to the interior of the cabinet body, handles are fixedly connected to the exteriors of the cabinet doors, a first base is fixedly connected to the top of the cabinet body, and a second base is fixedly connected to the top of the first base. The top of the first base is fixedly connected with a second base, and the exterior of the second base is fixedly connected with a first motor. By means of the structure, the first motor outside the second base is driven to be matched with the first driving rod to drive the external roller to rotate, so that the rope outside the roller is rotated, an operator binds one end of the rope and the fixed oriented strand board, and therefore binding operation can be completed at a high speed; compared with a manual bundling mode or other non-electric modes, the production efficiency is greatly improved, the production time of a single product is shortened, the rhythm of the whole production process is favorably improved, and the requirement of large-scale production is met.
Owner:XINJIANG JIUYUAN WOOD TECHNOLOGY CO LTD

Method and apparatus for the process-optimized production of manufactured wood boards

The invention relates to a method and an apparatus for the process-optimized production of manufactured wood boards, in particular oriented strand boards. In order to provide a method and an apparatus for the process-optimized production of manufactured wood products which make it possible to optimize quality while providing continuous quality assurance, which allow the best possible control variables to be determined particularly easily and quickly, and which also guarantee continuous production that results in the lowest possible wastage while maintaining the highest possible level of process stability, the invention provides the following: at least one process parameter, in particular the water content and / or the quantity of adhesive applied to the raw chip material, is measured in the course of the method by means of near-infrared spectroscopy; the measured values of the at least one process parameter are then sent to a control unit for process optimization and / or process-optimized control of the method, wherein the measurement of the at least one process parameter is taken at one or more positions, selected from: a position immediately upstream of the gluing, in particular between a dry raw chip hopper and the gluing station; a position immediately downstream of the gluing, in particular between the gluing station and a chip material distributor and / or a dispersing station; a position in the provision phase immediately downstream of a timber yard, in particular between the timber yard and a subsequent dryer; and / or a position in the provision phase immediately downstream of a dryer, in particular between the dryer and a sieving station and / or a dry raw chip hopper.
Owner:FLOORING TECH LTD

Structural osb panels with integrated compression resistant features

A wood structural panel (such as oriented strand board, plywood, or other cellulosic panel) used for structural sheathing with one or more pre-applied weather resistant barriers or layers (WRBs) with integrated compression-resistant features. When installed, the integrated compression-resistant features provide an air space or channels the WRB layer and the exterior cladding. This allows drainage of rainwater or other moisture that otherwise become trapped between the cladding and WRB layer, thus providing extra protection for the structure. These features are applied at the factory during or immediately after the manufacturing of the structural sheathing panel with WRB layer, and thus are integrated therewith as part of the integrated finished product.
Owner:LOUISIANA PACIFIC CORP

Cutting and punching whole-process preparation method of OSB (oriented strand board) heat insulation board

The invention provides a full-process preparation method for cutting and punching an OSB (oriented strand board) heat insulation board. Comprising the following steps: cutting and punching the OSB oriented structure insulation board; the fiber density, the glue content, the environment temperature and the humidity parameters of the OSB insulation board are collected through the sensing module; based on the parameters, the cutting speed, the punching pressure and the cutter feeding depth are dynamically adjusted through control logic operated by the micro-control unit; monitoring the state of the cutter in real time through a vibration sensor, and correcting parameters of the control logic according to a monitoring result; self-adaptive control over the whole cutting and punching process is achieved through a closed-loop feedback mechanism, and the closed-loop feedback mechanism comprises four sequentially-executed links including parameter collection, logic calculation, execution adjustment and state monitoring. The device can dynamically adapt to the whole cutting and punching process of plate characteristics and environmental changes.
Owner:湖南鲁丽木业有限公司

Rapid assembly house kit system for an emergency, temporary, or permanent shelter

A Rapid Assembly House Kit System for emergency shelter, temporary dwelling and permanent residence comprising: a plurality of lightweight pre-manufactured structural components, each structural component having pre-made coupling features, wherein the structural components include studs placed flange-to-flange with lips touching to create hollow columns and studs placed web-to web creating H-beams in cross section that sandwich a central wood strip; a plurality of pre-manufactured oriented strand board panels with adhered rigid insulation set for both interior and exterior use attaching to a structural framework; a set of bolts, washers and screws, wherein the pre-manufactured oriented strand board panels are coupled to the structural components through the pre-made coupling features with the bolts, washers and screws; and a set of modular components, including doors, windows, rafter connectors, and interior partition walls having coupling features that attach to the studs and tracks of the structural components.
Owner:BIRENBAUM SAM

Reconstruction method and device for internal three-dimensional structure of oriented strand board and storage medium

The invention discloses an oriented strand board internal three-dimensional structure reconstruction method and device and a storage medium, and belongs to the technical field of oriented strand structure material processing. The method comprises the steps that a single-layer strand distribution image B is obtained, and the two-dimensional outline, position coordinates and layer index information of single strands of the single-layer strand distribution image B are extracted; acquiring section density gradient data of the plate blank, calculating the compression ratio of each layer of wood shavings in the thickness direction of the plate blank based on the section density gradient data, and calculating the actual thickness of each layer of wood shavings of the plate blank according to the compression ratio; and based on the two-dimensional contour, the position coordinates, the layer index information and the actual thickness, reconstructing the internal three-dimensional structure of the oriented strand board. The technical problems that the X-ray tomography technology cannot detect the three-dimensional structure in the slab paving process, and the detection efficiency is reduced due to the fact that X-ray tomography equipment is high in cost and low in applicability can be solved.
Owner:NANJING FORESTRY UNIV

Novel high-strength wear-resistant container floor

The invention relates to a novel high-strength wear-resistant container floor which comprises a surface layer, at least one OSB (oriented strand board) layer, a bamboo-wood composite layer and a reinforced bottom layer, in the actual container floor processing process, the reinforcing bottom layer can be laid on the bottommost face, then the OSB oriented strand board layers are laid on the reinforcing bottom layer, and when the OSB oriented strand board layers are laid, the bamboo-wood composite layers are laid on the upper sides and the lower sides of the OSB oriented strand board layers and used for discharging moisture in the OSB oriented strand board layers, the strength is guaranteed, and the OSB oriented strand board layers are laid on the reinforcing bottom layer. And finally, the surface layer is laid on the uppermost bamboo-wood composite layer, and hot press forming is performed through a hot press after laying is completed, so that an existing container floor can be better replaced, and the production cost of the container floor is reduced while the strength is guaranteed.
Owner:FUJIAN YONGQING CONTAINER NEW MATERIALS CO LTD

A surface-finishable oriented strand board (OSB) installation equipment

ActiveCN120287399BAdapt to high-precision continuous paving requirementsMaintain directional pavement accuracyWood working apparatusDomestic articlesClassical mechanicsMechanical engineering
This invention relates to the field of particleboard production equipment technology, specifically to a surface-oriented particleboard (SOC) laying device, comprising a laying roller, sliders, slide rails, and an adjustment assembly. The laying roller is rotatably connected to the sliders at both ends; the sliders are slidably connected to the slide rails; the slide rails are arc-shaped and centered on the midpoint of the laying roller's axis; the adjustment assembly connects to two sliders respectively, allowing the two sliders to move in opposite directions along their corresponding slide rails to adjust and fix the tilt angle of the laying roller. This invention can adapt to the high-precision continuous laying requirements of multi-specification particleboard.
Owner:GUANGXI YUANFENG NEW MATERIAL CO LTD

A bamboo shavings production line for bamboo oriented strand board

This invention provides a bamboo shavings production line for bamboo oriented strand board (BOS), comprising: a feeding and conveying device for placing stacked bamboo chips; a transitional pressure clamping device, including a roller conveyor and a transitional pressure clamping assembly; a rotary shaving machine located at the discharge port of the transitional roller conveyor; a bamboo shavings flotation device, including an oil flotation tank, a flotation washing drum, a first scraper conveyor, and a first bamboo shavings collection belt conveyor; and a boiling device, including a hot water tank, a bamboo shavings pressing drum, a second scraper conveyor, and a second bamboo shavings collection belt conveyor. The advantages of this invention are: the transitional pressure clamping device clamps the stacked bamboo chips, the rotary shaving machine performs radial cutting on the bamboo, and the stacked bamboo chips are shaved into bamboo shavings by a ring cutter. The bamboo shavings are then screened in the bamboo shavings flotation device to separate qualified bamboo shavings and bamboo shavings. After boiling, steaming, and drying, the bamboo shavings meet the production requirements of BOS, resulting in high production efficiency.
Owner:FUJIAN BAYICUN YONGQING BAMBOO-WOOD IND DEV CO LTD

High-water-resistance fine-surface oriented strand board and preparation method thereof

The invention relates to the technical field of oriented strand boards, and discloses a high-water-resistance fine-surface oriented strand board and a preparation method thereof.The high-water-resistance fine-surface oriented strand board comprises a core layer and surface layers arranged on the upper layer and the lower layer of the core layer, and the high-water-resistance fine-surface oriented strand board is prepared by conducting gluing, pavement forming, pre-pressing and hot pressing on surface layer wood shavings and core layer wood shavings in sequence; the surface layer wood shavings are fine wood shavings, and the core layer wood shavings are large wood shavings; according to the percentage accounting for the absolutely dry mass of the surface layer wood shavings, the step of sizing is to apply 8% of an isocyanate adhesive, 12-14% of a urea-formaldehyde resin adhesive and 3-5% of a silane coupling agent into the surface layer wood shavings; according to the percentage accounting for the absolutely dry mass of the core layer wood shavings, the step of sizing is to apply 3-5% of an isocyanate adhesive, 1-3% of a paraffin emulsion and 2-5% of a silane coupling agent into the core layer wood shavings. The FOSB with high water resistance and high bonding strength is prepared by applying the waterproof agent to the surface layer and the core layer and controlling the compounding proportion of the adhesive and the waterproof agent and the application amount of the adhesive and the waterproof agent in the surface layer and the core layer.
Owner:TREEZO NEW MATERIAL TECH GRP CO LTD +1

Energy-saving and environment-friendly aluminum honeycomb core wood composite board

The utility model discloses an energy-saving and environment-friendly aluminum honeycomb core wood composite board, and relates to the technical field of wood composite boards. The energy-saving and environment-friendly aluminum honeycomb core wood composite board comprises an aluminum board, a plurality of groups of honeycomb holes are formed in the outer side of the aluminum board; the composition mechanism is arranged on the outer side of the aluminum plate and comprises oriented strand boards and wood grain boards, two sets of oriented strand boards are arranged on the outer side of the aluminum plate, and the wood grain boards are fixedly installed on the outer sides of one set of oriented strand boards; the installation mechanism is arranged on the outer side of the aluminum plate and located on the outer side of the composition mechanism. The inner sides of the two sets of oriented strand boards can be attached to the outer side of an aluminum plate, connecting rods and mounting cylinders are arranged in honeycomb holes, the connecting rods are arranged on the inner sides of the mounting cylinders, the relative positions of the two sets of oriented strand boards are fixed, wood grain boards and frosted boards are arranged in clamping grooves, and the positions of the wood grain boards and the frosted boards are limited; and the outer sides of the oriented strand board and the wood grain board are protected, and the situation that boards in the board are bonded through glue is reduced.
Owner:GONGYI KAIDA ALUMINUM CO LTD

Chipboard with the addition of plasma-treated rubber

UndeterminedSK1082026U1Polymer sciencePolymer chemistry
Chipboard with the addition of plasma-treated rubber consists of oriented wood chips (1) with a length of 80 to 150 mm, a width of 10 to 25 mm and a thickness of 0.5 to 0.75 mm, rubber granulate (2) treated by plasma in a proportion of 10 to 20% by weight with a fraction of 1 to 3 mm and an adhesive mixture, where the said OSB board is formed by hot pressing at a specific specific pressure, a specific temperature and a specific time.
Owner:TECHNICKA UNIVERZITA VO ZVOLENE +1

Flame-retardant surface layer oriented strand board based on interfacial penetration anchoring and method of making the same

A method for preparing flame-retardant surface-layer oriented strand board (OSB) based on interfacial penetration anchoring is provided, comprising: stirring long wood shavings and an acidic adhesive system composed of 1,6-hexanediamine aqueous solution, 2-hydroxyphosphonic acid-acetic acid aqueous solution, and diphenylmethane diisocyanate in a mixer under the condition of hot air flow; discharging the material when the pH value of the shaving surface reaches 4.0-6.0 to obtain pretreated surface-layer large shavings; mixing copolymer CS-H-H, wood fines, and diphenylmethane diisocyanate; discharging the material when the pH value of the wood fines reaches 7.7-8.5 to obtain pretreated core-layer fines; the reaction formula for preparing copolymer CS-H-H is as follows; laying the pretreated material in the order of surface-layer large shavings, core-layer fines, and surface-layer large shavings as the lower surface layer, core layer, and upper surface layer, and performing a hot-pressing process. This solves the problems of low interlayer bonding strength and easy corrosion of metal connectors in previous fine-grain core-layer OSBs.
Owner:INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY

Method for manufacturing reusable concrete formwork panels and concrete formwork panels

PendingCN122514631AParticle boardRelease agent
The invention relates to a method for manufacturing reusable concrete formwork panels and to a reusable concrete formwork panel in concrete casting. In order to provide a method for manufacturing concrete formwork panels which can be used multiple times and which is inexpensive to manufacture, and a concrete formwork panel, wherein the concrete formwork panel is also suitable for fair-faced concrete casting, a particle board or oriented strand board having two cover sides and side faces is first provided, a water-based two-component coating composition is then applied to at least one cover side in liquid form, wherein one component of the coating composition has a thermosetting carrier resin and the second component comprises at least one release agent component. Finally, the coated coating composition is cured in a hot press, thereby forming a closed coating on the particle board or oriented strand board.
Owner:SWISS KRONO TEC AG

Method of manufacturing an improved oriented strand board panel

An improved oriented strand board (OSB) panel or board with higher resin loading and control of the density to provide improved and / or enhanced properties, and methods of manufacturing such an improved OSB panel or board. In several exemplary embodiments, as described in greater detail below, resin loading of the strands used for OSB formation is increased in conjunction with the density of the manufactured OSB board being controlled to a certain density or within certain density ranges for use with decorative panels, exterior cladding or siding panels, engineered wood flooring, and / or exterior structural wall or roofing panels. Both increased resin-loading and controlled density increases are required for overall core performance increases, and the surprisingly enhanced performance characteristics outweigh the increased cost of production.
Owner:LOUISIANA PACIFIC CORP

A method for hot pressing and dehumidifying three-layer bamboo oriented strand board

The present invention discloses a method for paving and hot-pressing moisture removal of bamboo oriented strand board, comprising the following steps: S1, sorting bamboo shavings; S2, paving to form a slab; S3, rolling the surface bamboo shavings along the length direction to form filamentous cracks, paving the surface layers of the slab on both sides, and then covering them with wood veneer; S4, hot pressing. By providing surface shaving cracks and covering them with veneer composite, the present invention forms channels in the surface layer. These channels allow moisture to be effectively discharged through the channels formed by the cracks during the hot pressing process, aided by the arrangement of the internal shavings and the hot pressing temperature control method. This avoids the problem of blistering and debonding of the slab caused by the explosion of moisture due to pressure release.
Owner:TREEZO NEW MATERIAL TECH GRP CO LTD

Oriented strand board, preparation method of oriented strand board and application of oriented strand board in container bottom board

The invention relates to the technical field of container bottom plates, and discloses an oriented strand board, a preparation method of the oriented strand board and application of the oriented strand board in the container bottom plate. The preparation method of the oriented strand board comprises the following steps: S1, carrying out surface treatment on wood shavings by adopting polytetrahydrofuran-propylene oxide block copolyether glycol and double-end amino modified polytetrahydrofuran ether glycol; and S2, after the wood shavings treated in the step S1 are glued, oriented paving and assembling are conducted, then steam injection and hot press forming are conducted, and the oriented strand board is obtained. According to the oriented strand board manufactured through the method, high mechanical performance can be achieved at low density, and light weight of the container bottom board can be achieved.
Owner:TREEZO NEW MATERIAL TECH GRP CO LTD

Shop type container apple cabin

The utility model discloses a shop type container apple cabin, which belongs to the technical field of apple cabins, and comprises a facade wall surface A, a facade wall surface B, a facade wall surface C, a facade wall surface D, a top surface layer and a floor layer, the facade wall surface A, the facade wall surface B, the facade wall surface C and the facade wall surface D form the peripheral wall surface of the apple cabin, and each of the facade wall surface A, the facade wall surface B, the facade wall surface C and the facade wall surface D comprises an outer wall surface, a keel layer, a thermal insulation layer and an inner wall surface, the top surface layer comprises a waterproof steel plate, an oriented strand board, heat preservation rock wool, a steel frame keel layer and a bamboo fiber board suspended ceiling from top to bottom, and the floor layer is arranged at the bottom of the wall surface, is of a three-layer structure and comprises a stone-plastic board, a galvanized steel plate and a keel layer from top to bottom; one side of the A facade wall surface is provided with an A facade pivoted window, a single door and a French window, and an outdoor bar counter is arranged below the A facade pivoted window; a B-face pivoted window is arranged in the middle of the B-face wall face. The utility model has the advantages of simple structure, convenience in construction, water resistance, heat preservation and aesthetic feeling, and improves the experience feeling of customers.
Owner:JIANGSU ZHONGPAI ENVIRONMENTAL PROTECTION TECH CO LTD

Method of manufacturing an improved oriented strand board panel

An improved oriented strand board (OSB) panel or board with higher resin loading and control of the density to provide improved and / or enhanced properties, and methods of manufacturing such an improved OSB panel or board. In several exemplary embodiments, as described in greater detail below, resin loading of the strands used for OSB formation is increased in conjunction with the density of the manufactured OSB board being controlled to a certain density or within certain density ranges for use with decorative panels, exterior cladding or siding panels, engineered wood flooring, and / or exterior structural wall or roofing panels. Both increased resin-loading and controlled density increases are required for overall core performance increases, and the surprisingly enhanced performance characteristics outweigh the increased cost of production.
Owner:LOUISIANA PACIFIC CORP

Shaving board reinforced by fiber reinforced polymer layer and preparation method and application thereof

The invention discloses a shaving board reinforced by a fiber reinforced polymer layer and a preparation method and application thereof, and belongs to the technical field of wood composite materials. The shaving board comprises a shaving board base material and an FRP layer bonded to at least one surface of the shaving board base material. Wherein the FRP layer is composed of carbon fiber cloth and epoxy resin; the thickness of the shaving board base material is 18 mm, the density is 0.64-0.72 g / cm < 3 >, and the surface density of the carbon fiber cloth is 300 g / m < 2 >. The bending strength of the prepared FRP-PB reaches 53.98 MPa under the standard condition, and the strength retention rate reaches 84.8% after high-humidity or heat-moisture treatment; under normal humidity, the creep quantity is lower than that of a common protection plate and is equivalent to that of an oriented strand board; after high-humidity treatment, the FRP-PB shows more excellent creep resistance than a common shaving board and an oriented shaving board; the invention is especially suitable for bathroom cabinets, kitchen cabinets and other furniture and building built-in components.
Owner:NANJING FORESTRY UNIV

Structural OSB panels with integrated compression resistant features

A wood structural panel (such as oriented strand board, plywood, or other cellulosic panel) used for structural sheathing with one or more pre-applied weather resistant barriers or layers (WRBs) with integrated compression-resistant features. When installed, the integrated compression-resistant features provide an air space or channels the WRB layer and the exterior cladding. This allows drainage of rainwater or other moisture that otherwise become trapped between the cladding and WRB layer, thus providing extra protection for the structure. These features are applied at the factory during or immediately after the manufacturing of the structural sheathing panel with WRB layer, and thus are integrated therewith as part of the integrated finished product.
Owner:LOUISIANA PACIFIC CORP

Deviation correcting device for oriented strand board production

The utility model discloses a deviation rectifying device for OSB (oriented strand board) production, which comprises a support frame, a stacking frame is fixedly connected to the outside of the support frame, a shell is arranged at the top of the stacking frame, a base is fixedly connected to the top of the stacking frame, an electric push rod is fixedly connected to the bottom of the base, and the electric push rod is fixedly connected to the bottom of the shell. The output end of the electric push rod is rotationally connected with a first rotating shaft, and the outer portion of the first rotating shaft is fixedly connected with an impeller. Through the structure, the electric push rod at the bottom drives the first rotating shaft to rotate so as to drive the external impeller to rotate, so that the second connecting rods at the two ends of the impeller move, and one ends of the second connecting rods are fixed to the base, so that the clamping plates at the top of the base are driven to move, and the edges between oriented strand boards are tidied; therefore, tight arrangement can be achieved, and gaps and space waste between stacks are reduced. Therefore, the storage space can be more effectively utilized in a warehouse or in the transportation process, the storage and transportation efficiency is improved, and the cost is reduced.
Owner:XINJIANG JIUYUAN WOOD TECHNOLOGY CO LTD

Adhesive composition for oriented structural plate, oriented structural plate and preparation method of oriented structural plate

The invention belongs to the field of oriented structural plates, and relates to an adhesive composition for an oriented structural plate, the oriented structural plate and a preparation method of the oriented structural plate. The adhesive composition for the oriented structural plate is prepared from the following components in parts by weight: 80 to 120 parts of polymerized MDI isocyanate, 5 to 10 parts of epoxidized natural rubber, 1 to 3 parts of carboxylated nanocellulose, 3 to 5 parts of a core-shell structure toughening agent, 1 to 2 parts of a silane coupling agent, 1 to 2 parts of a lignin model compound and 0.5 to 1 part of a latent catalyst. In the core-shell structure toughening agent, the core is polybutadiene, and the shell is polymethyl methacrylate. According to the adhesive composition disclosed by the invention, through multi-component collaborative design, the toughness is remarkably improved on the premise of not weakening the bonding strength, the contradiction between the bending strength and the impact toughness is fundamentally relieved, and a key material basis is provided for preparation of a high-performance formaldehyde-free oriented structural plate.
Owner:GUANGXI FORESTRY RES INST

A method for continuous flat pressing of rapid-curing polyurethane-based plywood

This invention discloses a continuous flat-press manufacturing method for rapidly curing polyurethane-based blockboard, relating to the field of wood processing technology. The method involves using finger-jointing and cross-jointing methods to form core boards from strips. When the finger-jointed strips are cross-jointed, the finger joints are staggered and do not overlap. The core boards are then longitudinally joined using finger-jointing on the production line to form continuous core boards. Continuous wood veneers are obtained by splicing wood veneers. Solvent-free foaming polyurethane resin is used as an adhesive; after applying the adhesive to the continuous core board and continuous wood veneers, the continuous wood veneers are laid on the upper and lower surfaces of the continuous core board to obtain a continuous blockboard blank. After hot pressing, the blank is sawn to obtain blockboard of the desired specifications. This invention solves the technical problems of high formaldehyde release, low production efficiency, and limited product width in blockboard manufacturing. This invention can also be used to prepare blockboard products with oriented strand board (OSB) as the substrate.
Owner:SOUTHWEST FORESTRY UNIVERSITY

Preparation method of anti-corrosion high-strength OSB (oriented strand board)-based laminated wood

The invention discloses a preparation method of anti-corrosion type high-strength OSB (oriented strand board)-based laminated wood, which comprises the following steps of: dipping an OSB base material in a copper azole anti-corrosion solution, sequentially performing vacuum dipping and pressurizing treatment, and forming gradient distribution of the drug loading capacity of a preservative from the surface layer to the core layer of the OSB base material; performing double-sided slicing on the OSB base material subjected to preservative treatment, removing a high-concentration anticorrosive layer on the surface layer, and processing an inverted-cone-shaped micropore array through nanosecond laser; adding nano-zinc oxide into the resorcinol-formaldehyde resin glue solution, and performing ultrasonic dispersion to form a nano-modified adhesive with a three-dimensional network structure; uniformly coating the surface of the activated OSB base material with a nano modified adhesive, and carrying out directional assembly; and a high-frequency hot press is adopted for synchronously applying an electromagnetic field and conducting hot pressing treatment on the assembled OSB base material, curing is conducted, and the anti-corrosion type high-strength OSB-based laminated wood is obtained. The bonding strength is improved while the excellent corrosion resistance is maintained, and collaborative optimization of the corrosion resistance and the structural strength is achieved.
Owner:NANJING FORESTRY UNIV