CN110871477A - Insect-proof multilayer eucalyptus board and production method thereof - Google Patents

Insect-proof multilayer eucalyptus board and production method thereof Download PDF

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CN110871477A
CN110871477A CN201911208465.5A CN201911208465A CN110871477A CN 110871477 A CN110871477 A CN 110871477A CN 201911208465 A CN201911208465 A CN 201911208465A CN 110871477 A CN110871477 A CN 110871477A
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insect
hot pressing
proof
production method
agent
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陈姗姗
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Guangxi Hengxian Zhenglin Wood Co Ltd
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Guangxi Hengxian Zhenglin Wood Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27DWORKING VENEER OR PLYWOOD
    • B27D1/00Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00Scaring or repelling devices, e.g. bird-scaring apparatus
    • A01M29/12Scaring or repelling devices, e.g. bird-scaring apparatus using odoriferous substances, e.g. aromas, pheromones or chemical agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27DWORKING VENEER OR PLYWOOD
    • B27D5/00Other working of veneer or plywood specially adapted to veneer or plywood
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02Processes; Apparatus
    • B27K3/12Impregnating by coating the surface of the wood with an impregnating paste
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52Impregnating agents containing mixtures of inorganic and organic compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/13Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284Application of adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00Ancillary operations in connection with laminating processes
    • B32B38/16Drying; Softening; Cleaning
    • B32B38/164Drying
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D161/00Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/20Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C09D161/26Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C09D161/28Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/70Additives characterised by shape, e.g. fibres, flakes or microspheres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27KPROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2240/00Purpose of the treatment
    • B27K2240/20Removing fungi, molds or insects
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/38Boron-containing compounds
    • C08K2003/387Borates

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Forests & Forestry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Fluid Mechanics (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Birds (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

The invention provides an insect-proof multilayer eucalyptus board and a production method thereof, wherein the production method of the multilayer board comprises the steps of single board sheet sorting, sheet gluing, cold pressing, hot pressing, standing and health preserving, dust scraping, sanding, repairing, edge cutting and panel pasting, and is characterized in that: the method comprises the following steps of spraying a layer of insect-proof curing film on the periphery and the upper part and the lower part of the surface of a plate blank before the first hot pressing and the last hot pressing, protecting and preventing glue from being dried too fast in the hot pressing process, keeping the stress inside a multilayer plate, fully reacting the urea-formaldehyde glue, and enabling the formed multilayer plate not to go moldy easily.

Description

Insect-proof multilayer eucalyptus board and production method thereof
Technical Field
The invention relates to a multilayer wood board and a production method thereof, in particular to an insect-proof multilayer eucalyptus wood board and a production method thereof.
Background
The multi-layer wood board is a multi-layer board material formed by rotationally cutting wood sections into single boards or slicing wood squares into thin wood and gluing the single boards by using an adhesive, the fiber directions of the single boards of adjacent layers are usually mutually vertical to be glued, and the outer surfaces of the single boards are faced or not faced according to requirements, and the multi-layer wood board is also called a glued multi-layer board.
The multi-layer wood board is one of common materials for furniture, is one of three large boards of artificial boards, and can also be used as a material for airplanes, ships, trains, automobiles, buildings, packing boxes and the like. Typically with the skin and inner sheets symmetrically disposed on either side of the center layer or core. The glued veneer is pressed into the wood grain board blank by the criss-cross matching of the glued veneer according to the wood grain direction under the condition of heating or not heating. The number of layers is generally odd, and a few are even. The difference of physical and mechanical properties in the longitudinal and transverse directions is small. The common plywood types include three-ply board and five-ply board, and at present, the plywood types have more than seven layers. The plywood can improve the utilization rate of the wood and is a main way for saving the wood. The main tree species are: beech, cinnamomum camphora, willow, poplar, eucalyptus, and the like.
In order to improve the anisotropic properties of natural wood as much as possible, and to make the plywood uniform in properties and stable in shape, the general plywood structure should obey two basic principles: firstly, the symmetry is realized; and secondly, the fibers of the veneers of the adjacent layers are mutually vertical. The symmetry principle is that the veneers on both sides of the center plane of symmetry of the plywood are required to be symmetrical to each other no matter the wood properties, the thickness of the veneers, the number of layers, the fiber direction, the water content and the like. In the same veneer board, the veneer with single tree species and thickness can be used, and the veneer with different tree species and thickness can also be used; but any two layers of the single-board trees which are symmetrical to each other on the two sides of the symmetrical central plane have the same species and thickness. The front and back panels are allowed to be of different tree species.
In order to develop plywood production by fully and reasonably utilizing forest resources and achieve the purpose of using the plywood as much as possible, the newly established national standard in China is divided into plywood for coating (used for products such as furniture, sewing machine tables and various electrical appliance shells with surfaces needing to be coated with transparent coatings), plywood for decoration (used as a decoration material for buildings, furniture, vehicles and ships), general plywood (suitable for packaging, padding and other applications) and veneer decorative plywood (used as a high-grade decoration material for buildings, furniture, vehicles, ships and the like) according to the use condition of the plywood.
In recent years, the fast-growing eucalyptus tree species cultivated in eastern forest lands of Guangxi China is introduced in the provinces of Shuangguan, Yunnan, Fujian, Guizhou, Hainan and the like in the south of China, the fast-growing eucalyptus is a light-colored broad-leaved wood, the wood grain is compact and irregular, the sapwood layer is wide, and the fast-growing eucalyptus tree species is white to light pink; the heart material has a light brownish red color. At present, the fast-growing eucalyptus globulus grows fast, can be grown within 3 years, farmers in mountainous areas plant a large amount of the fast-growing eucalyptus globulus, which accounts for more than 50 percent of available wood in south, and in addition, the original tree species such as pine trees, fir trees, chinaberry trees and the like grow slowly, so that the fast-growing eucalyptus globulus can not be cut down randomly as a natural forest, the wood yield of 1 mu of fast-growing eucalyptus globulus is equivalent to the natural forest yield of more than 5 mu,
the eucalyptus only accounts for 13.7% of the forest area in Guangxi, but the wood requirements of more than 80% in Guangxi and more than 20% in China are met. At present, high-performance eucalyptus reconstituted wood, eucalyptus veneer laminated wood, bamboo eucalyptus composite material, thick-core eucalyptus solid wood composite board, formaldehyde-free eucalyptus plywood manufacturing technology and the like are successfully developed in China, and the application of eucalyptus in artificial boards is increasingly popularized.
The core layer of the solid wood composite multilayer board is formed by pressing eucalyptus single sheets through adhesives. Eucalyptus is a plant of MyrtaceaeMyrtaceaeEucalyptus genusEucalyptusThe eucalyptus tree has strong adaptability to plants, can grow in poor soil, has high growth speed and low nursing cost, and is suitable for the field of agricultural cropsSuch a planting area is increasing year by year. Eucalyptus wood is red, glossy, has no special smell, has staggered grains, dense structure, hard and heavy material and is easy to bend. The eucalyptus with larger diameter grade is rotary cut into a veneer to be used as a core board for producing plywood or laminated veneer lumber, and the eucalyptus with small diameter grade, branch wood or difficult rotary cut is processed into wood chips for papermaking or producing fiberboards, so that the comprehensive utilization rate of the eucalyptus can be improved to more than 90%.
At present, the solid wood composite floor is generally used for manufacturing furniture, wood floors and decorative plates, a plurality of families use the solid wood composite floor as a floor and cabinet plate material, the common multilayer wood plate as a partition plate cannot prevent insects, particularly, when the weather is wet in summer, the insects, particularly termites, cockroaches and ants, can easily damage the furniture, so people have paid attention to the situation at present.
The applicant is a production enterprise adopting solid wood composite multilayer boards at present in the positive forest wood industry limited company in the horizontal county of Guangxi, and according to the market demands at home and abroad, the process characteristics of the existing eucalyptus composite boards are greatly improved, so that the eucalyptus composite boards which are less in volatile formaldehyde, high in strength and suitable for decoration materials of buildings, furniture, vehicles and ships are produced, and a plurality of Chinese patents are also applied, for example:
[1] a method for producing a full eucalyptus plywood by adopting insect-proof and mildew-proof composite urea resin, 201610746220.8, 106182218B, applicant: guangxi, prefecture, positive forest, wood industries, ltd, filing date: 2016-08-29, abstract: the method for producing the full eucalyptus plywood by adopting the insect-proof and mildew-proof composite urea-formaldehyde resin comprises the following steps: plank rotary sheet → veneer drying → gluing → three times of cold pressing → static curing → three times of hot pressing → heat dissipation curing → plate blank thickness fixing and sanding. The key of the production method is that melamine modified urea resin is adopted as a main material of the adhesive, and oxidized starch is added as a viscous complexing agent;
[2] a method for producing a eucalyptus and birch composite floor by adopting high-temperature resistant composite urea resin, 201610747076.X, 106272849B, applicant: guangxi, prefecture, positive forest, wood industries, ltd, filing date: 2016-08-29, abstract, the invention relates to a method for producing eucalyptus and birch composite floor by adopting high temperature resistant composite urea resin, which comprises the following steps: the method comprises the steps of wood plate turning → veneer drying → gluing → three times of cold pressing → standing and curing → three times of hot pressing → heat dissipation and curing → plate blank thickness-fixing and sanding → base material surface gluing → curing and grooving → paint spraying, drying and shaping. The key point of the production method is that melamine modified urea resin is adopted as the main material of the adhesive.
[3] Method for producing full eucalyptus plywood by adopting anticorrosive composite urea-formaldehyde resin, 201610747071.7, 106313201B, applicant: guangxi, prefecture, positive forest, wood industries, ltd, filing date: 2016-08-29, abstract: the method for producing the full eucalyptus plywood by adopting the anticorrosive composite urea resin comprises the following steps: plank rotary sheet → veneer drying → gluing → three times of cold pressing → static curing → three times of hot pressing → heat dissipation curing → plate blank thickness fixing and sanding. The key of the production method is that melamine modified urea resin is adopted as a main material of the adhesive, and oxidized starch is added as a viscous complexing agent;
[4] a method for producing a eucalyptus and birch composite floor by adopting insect-proof and mildew-proof composite urea resin, 201610747086.3, 106335120B, applicant: guangxi, prefecture, positive forest, wood industries, ltd, filing date: 2016-08-29, abstract, a method for producing eucalyptus and birch composite floor by adopting insect-proof and mildew-proof composite urea resin, which comprises the following steps: the method comprises the steps of wood plate turning → veneer drying → gluing → three times of cold pressing → standing and curing → three times of hot pressing → heat dissipation and curing → plate blank thickness-fixing and sanding → base material surface gluing → curing and grooving → paint spraying, drying and shaping. The key point of the production method is that melamine modified urea resin is adopted as the main material of the adhesive.
[5] A method for producing eucalyptus and birch composite floor by adopting weather-resistant composite urea resin, 201610746169.0, 106272848B, applicant: guangxi, prefecture, positive forest, wood industries, ltd, filing date: 2016-08-29, abstract, the invention relates to a method for producing eucalyptus and birch composite floor by adopting weather-resistant composite urea resin, which comprises the following steps: the method comprises the steps of wood plate turning → veneer drying → gluing → three times of cold pressing → standing and curing → three times of hot pressing → heat dissipation and curing → plate blank thickness-fixing and sanding → base material surface gluing → curing and grooving → paint spraying, drying and shaping. The key point of the production method is that melamine modified urea resin is adopted as the main material of the adhesive.
[6] Method for producing a cabinet panel using a flame retardant composite urea formaldehyde resin, 201610752586.6, applicant: guangxi, prefecture, positive forest, wood industries, ltd, filing date: 2016-08-29, abstract the invention relates to a household building material, in particular to a method for producing a cabinet plate by adopting flame-retardant composite urea-formaldehyde resin, wherein the structure of the cabinet plate from top to bottom is as follows: decorative paper, China fir veneers, shaving boards and back boards; the periphery of the cabinet plate is edged by aluminum alloy; and a flame-retardant composite urea-formaldehyde resin adhesive is coated between the fir veneer and the particle board, and a flame-retardant composite urea-formaldehyde resin is coated between the particle board and the back board.
In the process of producing and applying products, the applicant thinks of a plurality of technical schemes in the composite urea-formaldehyde resin adhesive, such as adding insect-proof and mildew-proof agents, flame retardants, preservatives, high-temperature resistant agents and the like, and overcomes the defect that a plurality of existing urea-formaldehyde resin adhesives release more formaldehyde, but the composite urea-formaldehyde resin adhesive has defects in some aspects, such as easy deformation of the products when pressure is not uniformly applied in the hot pressing process sometimes, non-uniform drying process sometimes, cracking phenomenon, non-uniform gluing sometimes, and over-standard formaldehyde of the products can not be ensured, and a plurality of technical indexes are still needed to be improved.
Disclosure of Invention
The technical scheme of the invention is as follows:
the invention provides a production method of an insect-proof multilayer eucalyptus board, which comprises the steps of single board sheet sorting, sheet gluing, cold pressing, hot pressing, standing, curing, ash scraping, sanding, repairing, trimming and panel pasting, and is characterized in that: before the first hot pressing and the last hot pressing, spraying a layer of insect-proof curing film on the periphery and the upper and lower parts of the surface of the plate blank to protect glue from being dried too quickly in the hot pressing process and keep the stress in the multilayer plate, and also enabling urea-formaldehyde glue to be fully reacted completely to prevent insects for the multilayer plate after forming, reducing volatile formaldehyde in the using process of a user, carrying out hot pressing and standing maintenance, sanding and panel pasting on the plate, and carrying out edge sawing and packaging to obtain an insect-proof multilayer eucalyptus plate product;
the insect-proof curing film consists of thermosetting resin, insect-proof agent, curing agent and auxiliary agent, wherein the thermosetting resin adopts melamine formaldehyde resin, furfuryl alcohol resin or acrylic resin;
the insect-resistant agent is the combination of a chemical insect-resistant agent and a plant insect-resistant agent; the plant insect repellant is 3-5 times of the chemical insect repellant;
the curing agent is biuret, and the auxiliary agent comprises glass beads, organic silicon, titanium dioxide and calcium carbonate; wherein the weight portion of the thermosetting resin is 40-60; 3-8 parts of a curing agent; 2-4 parts of insect-resist agent; the balance of auxiliary agents or fillers.
The construction mode of the insect-proof curing film is that thermosetting resin, curing agent, insect-proof agent and auxiliary agent are made into powder, and the powder is sprayed on the periphery, upper surface and lower surface of the plate blank after being mixed.
The chemical insect-resist agent comprises a mixture of borate and pyrethrin, wherein the weight ratio of the borate to the pyrethrin is 1: 1;
the borate is sodium tetraborate (Na)2B4O7·10H2O);
The plant insect repellent comprises one or more of camphor tree wood powder, roughcast pine powder, anise residue and coffee residue;
the cold pressing and the hot pressing are carried out for 2 times or 3 times, the cold pressing temperature is room temperature, the pressure is 0.8-1.0 MPa, and the hot pressing pressure is 1.5-2.0 MPa; the temperature of the first hot pressing is 120-125 ℃; the temperature of the second hot pressing is 115-120 ℃, and the temperature of the third hot pressing is 125-130 ℃; the standing and curing temperature is 80-90 ℃, and the time is 4-6 h.
The adhesive for gluing the thin plate is urea-formaldehyde resin or phenolic resin.
The veneer is prepared by sticking paint-free boards or boards with flatness and smoothness on the upper surface or upper and lower surfaces of a plurality of layers of eucalyptus boards, including poplar boards, fir boards and beech boards.
The following is information about plant repellents:
the camphor tree powder is a natural plant camphor tree, also called camphor tree, and is also called as camphor tree: cinnamomum camphora and Cinnamomum camphora wood; latin name:Cinnamomum camphora (L.) Preslcrushed wood belonging to Lauraceae has mothproof, insect-repellent and antiseptic effects.
Baeckea, a plant of the family Myrtaceae of the order Myrtaceae, Latin scientific name, Baeckea frutescens L. Baeckea frutescens chemical substances mainly α -pinene (α -pinene), para-cymene (p-cymene), trans-geraniol (trans-carnenol), myrtanal (myrtenal), cineole (cineole), caraway (d-carnone), limonene (limone), α - (royal) (Wangba) ene (α -copaene), linalool (linalool), 4-terpinenol (4-terpinenol), chrysophanol (occidentale), guaiacol (guaiazulene), borneol (bornenol), linalool (elemol), nerol (nerol), thymol (thy-mol), caryophyllene (caryophyllene), and insect repellent compounds.
The anise residues are residues after oil steaming of the anises, and the inventor finds that the anise residues have a plurality of ketone chemical substances, have aromatic smell and have the effects of expelling wind, removing cold and expelling pests.
The coffee grounds, which are the residues left by people grinding coffee in daily life, are discarded by people in the past, but have the function of expelling insects, according to the United states environmental protection agency, mosquitoes and a plurality of mosquitoes can not smell coffee fragrance, and the mosquitoes can be prevented by spraying dry coffee grounds nearby home or placing burnt coffee grounds.
In the thermosetting resin described above: the physicochemical properties of various thermosetting resins are as follows:
melamine-formaldehyde resin (english name melamine-formaldehyde resin), a polymer obtained by reacting melamine with formaldehyde. The cross-linking reaction occurs during the processing and molding, and the product is infusible thermosetting resin. The cured melamine formaldehyde resin is colorless and transparent, is stable in boiling water, can be used even at 150 ℃, and has self-extinguishing property, arc resistance and good mechanical property.
Furfuryl alcohol resin, the english name furfurfurfuryl alcohol resin defines furan resin produced using furfuryl alcohol as a raw material. The curing agent is added at room temperature to be cured into the thermosetting material.
Acrylic resin, which is a generic name for polymers of acrylic acid, methacrylic acid and derivatives thereof. The acrylic resin coating is a thermoplastic or thermosetting resin coating prepared by using (methyl) acrylate and styrene as main components and acrylic resin obtained by copolymerizing the (methyl) acrylate and styrene with other acrylate, or an acrylic radiation coating.
The thermosetting acrylic resin is a resin which has a certain functional group in the structure and forms a network structure by reacting with the functional group in the added amino resin, epoxy resin, polyurethane and the like during paint preparation, and the thermosetting resin is generally relatively low in molecular weight. The thermosetting acrylic paint has excellent fullness, luster, hardness, solvent resistance and weather resistance, and does not change color or turn yellow when being baked at high temperature.
Curing agent biuret, which is white long-sheet crystal. Has no odor. It has hygroscopic property. The crystal in water contains 4 molecules of crystal water. At about 110 ℃ water is lost, at 193 ℃ it decomposes and at a higher temperature melamine is formed. Is easily soluble in ethanol and slightly soluble in diethyl ether.
Biuret, as an aliphatic polyurethane curing agent, has good weather resistance, good compatibility with solvents such as polyol or butyl acetate, and good high-temperature solvent resistance after curing with polyol-containing polymers.
The organosilicon product is of a main chain structure with silicon-oxygen (Si-O) bonds, the bond energy of C-C bonds is 82.6 kilocalories per gram molecule, and the bond energy of Si-O bonds is 121 kilocalories per gram molecule in the organosilicon, so that the organosilicon product has high thermal stability, and chemical bonds of molecules are not broken or decomposed at high temperature (or radiation irradiation). The organosilicon can resist high temperature and low temperature, and can be used in a wide temperature range. The change with temperature is small whether the chemical property or the physical and mechanical property is changed. The invention can select silane coupling agent, silicon oil (silicone grease, silicon emulsion, silicon surfactant), silicon resin and the like; the organic silicon has unique structure, combines the performances of inorganic materials and organic materials, has the basic properties of low surface tension, small viscosity-temperature coefficient, high compressibility, high gas permeability and the like, and has the excellent characteristics of high and low temperature resistance, electrical insulation, oxidation resistance stability, weather resistance, flame retardancy, hydrophobicity, corrosion resistance, no toxicity, no odor, physiological inertia and the like.
The invention has the following prominent substantive characteristics and remarkable progress:
1. with the improvement of the living standard of people, the requirements for home decoration are also continuously improved. The multilayer board becomes the preferred material for home furniture or floor decoration because of natural and elegant grains and good texture. The multilayer composite board overcomes the defects of wet expansion and dry shrinkage of the solid wood board, has better dimensional stability, and simultaneously keeps the natural wood grain and comfortable foot feel of the solid wood floor, thereby becoming an important variety in the floor. The solid wood composite board can be formed by alternately laminating boards of different tree species, overcomes the defect of unidirectional isotropy of the solid wood board, and has small dry shrinkage and wet expansion rate. The solid wood composite board has the advantages of both the stability of the reinforced board and the attractiveness of the solid board, and is environment-friendly, and the solid wood composite board has the advantages of a common solid board, effectively adjusts the internal stress between woods, and overcomes the defect that the deformation of the woods is large along with the change of seasonal humidity, so that the solid wood composite board is popular with consumers.
2. In the prior art, if the product is easy to deform when pressure is not uniform enough sometimes in the hot pressing process of the multilayer board, sometimes the drying process is not uniform enough, cracking occurs, some glue applying is not uniform, and the formaldehyde of the product cannot exceed the standard, a layer of curing film is sprayed on the periphery and the upper part and the lower part of the surface of the board blank before the first hot pressing and the last hot pressing, so that the glue is prevented from being dried too fast in the hot pressing process, the stress in the multilayer board is kept, the urea formaldehyde glue can be fully reacted, the formed multilayer board is not easy to crack, and the volatile formaldehyde is reduced in the using process of a user.
3. The wood insect-resist agent refers to the performance characteristics of an agent capable of preventing wood from growing insects: (1) the wood treated by the product has quick interaction between the components of the medicament and the wood, has strong loss resistance, and is a high-efficiency fire-resistant pesticide; has strong killing power to bacteria, insects (such as termites and longicorn). (2) The product has strong permeability, good fixation performance after being soaked in wood, difficult loss, strong durability, no volatilization, no harm to environment and small metal corrosion, and the treated wood product does not influence painting and painting of the wood, does not reduce the insulation performance of the wood, does not reduce the mechanical strength, can prolong the service life of the wood by 5-10 times, and has good effect on furniture and floors. (3) The product has no special pungent smell, and can not cause harm to the environment after being used, thus being an environment-friendly product. (4) In addition, the insect-resist agent added in the invention has good physical and chemical stability, namely has stronger stability to the action of light, heat, acid, alkali, vibration and the like, has better solubility to related solvents, is odorless and non-corrosive, has low volatility after being pasted on a panel, has good compatibility with wood and products thereof, and generally does not influence the material quality and the physical processing performance of the wood.
4. The multilayer solid wood composite board can be applied to the manufacture of bedrooms, living rooms, study rooms and offices, can also be used as a wood floor, has longer service life and needs long-time environmental destruction inspection. The urea formaldehyde and phenol formaldehyde glue applied to the solid wood composite board adhesive in the market at present release formaldehyde greatly, but before the first hot pressing and the last hot pressing, a layer of curing film is sprayed on the periphery and the upper part and the lower part of the surface of the plate blank, so that the strength is improved, the formaldehyde release concentration is greatly reduced, and the insect prevention effect is good.
Drawings
FIG. 1 is a process flow chart of the production method of the insect-proof multi-layer eucalyptus board.
The production method of the insect-proof multilayer board comprises the steps of single board sheet sorting, sheet gluing, three times of cold pressing, three times of hot pressing, two times of standing and health preserving, dust scraping, sanding, repairing, trimming and panel pasting, and is characterized in that: at first cold pressing, repair side cut, around the plate blank surface before first hot pressing and last hot pressing with the upper and lower spraying one deck protection against insects solidification membrane, the protection prevents glue at hot pressing in-process too fast drying, and keep the inside stress of multiply wood, can also make it urea-formaldehyde glue fully react completely, the multiply wood after making it the shaping is difficult for the fracture, the user use has reduced volatile formaldehyde, panel after the hot pressing of the third time is through the health preserving of stewing, sand light and veneer pasting, can saw the limit packing obtain protection against insects multilayer eucalyptus board product.
Detailed Description
Example 1
The production method of the multilayer insect-proof eucalyptus board comprises the steps of single board sheet sorting, sheet gluing, three times of cold pressing, three times of hot pressing, two times of standing and health preserving, dust scraping, sanding, repairing, trimming and panel pasting, and is characterized in that: before the first cold pressing, repairing and trimming, the first hot pressing and the last hot pressing, a layer of insect-proof curing film is sprayed on the periphery and the upper part and the lower part of the surface of the plate blank, so that the glue is prevented from being dried too fast in the hot pressing process, the stress in the multilayer plate is kept, the urea-formaldehyde glue can be fully reacted, and the formed multilayer plate is high in strength and insect-proof; volatile formaldehyde is reduced in the using process of a user, after the third hot pressing, the plate is subjected to standing, curing, sanding and panel pasting, and then edge sawing and packaging can be carried out to obtain the insect-proof multilayer eucalyptus plate product.
The construction method of the curing film is that the thermosetting resin, the curing agent and the auxiliary agent are made into powder, the powder is sprayed on the periphery, the upper surface and the lower surface of the plate blank after being mixed, and the curing film is firmly attached to the outer surface of the plate blank through the high temperature in the hot pressing process.
The cold pressing temperature is room temperature, the pressure is 0.8-1.0 MPa, and the hot pressing pressure is 1.5-2.0 MPa; the temperature of the first hot pressing is 120-125 ℃; the temperature of the second hot pressing is 115-120 ℃, and the temperature of the third hot pressing is 125-130 ℃; the standing and curing temperature is 80-90 ℃, and the time is 4-6 h.
The adhesive for gluing the thin plate is urea-formaldehyde resin.
The veneer is prepared by sticking paint-free boards or boards with flatness and smoothness on the upper surface or upper and lower surfaces of a plurality of layers of eucalyptus boards, including poplar boards, fir boards and beech boards.
The insect-proof curing film consists of thermosetting resin, insect-proof agent, curing agent and assistant, the thermosetting resin adopts melamine formaldehyde resin, the curing agent is biuret, the insect-proof agent is the combination of chemical insect-proof agent and plant insect-proof agent, and the chemical insect-proof agent is borate (Na)2B4O7·10H2O) and pyrethrin, the weight ratio of borate to pyrethrin is 1: 1; the plant insect repellant adopts camphor tree wood powder and baeckea frutescens powder in a ratio of 1:1, and the weight of the plant insect repellant is 3 times that of the chemical insect repellant; the borate is sodium tetraborate (Na)2B4O7·10H2O); the plant insect repellent can also be mixture of fructus Anisi Stellati residue and coffee residue.
Wherein the weight portion of the thermosetting resin is 40-50; an insect repellent 2; a curing agent 5; auxiliary agent and filler glass bead, organic silicon, titanium dioxide and calcium carbonate, wherein the balance is 10-15; 5 parts of organic silicon, 9 parts of titanium dioxide and the balance of calcium carbonate.
The construction mode of the insect-proof curing film is that thermosetting resin, curing agent, insect-proof agent and auxiliary agent are made into powder, and the powder is sprayed on the periphery, upper surface and lower surface of the plate blank after being mixed.
Example 2
The production method of the multilayer insect-proof eucalyptus board comprises the steps of single board sheet sorting, sheet gluing, three times of cold pressing, three times of hot pressing, two times of standing and health preserving, dust scraping, sanding, repairing, trimming and panel pasting, and is characterized in that: at first cold pressing, repair side cut, first hot pressing and last hot pressing before at the slab surface around with the upper and lower spraying one deck protection against insects solidification membrane, the protection prevents glue at hot pressing in-process too fast drying, and keep the inside stress of multiply wood, can also make it urea-formaldehyde glue fully react completely, the multiply wood intensity after making it the shaping is high, the user use has reduced volatile formaldehyde, panel after the third hot pressing is through the health preserving of stewing, sand light and veneer pasting, can saw the limit packing obtain protection against insects multilayer eucalyptus board product.
The construction mode of the cured film is that the thermosetting resin, the curing agent and the auxiliary agent are made into powder and sprayed on the periphery, the upper surface and the lower surface of the plate blank after being mixed. And firmly attaching the curing film to the outer surface of the plate blank through the high temperature of the hot pressing process.
The cold pressing temperature is room temperature, the pressure is 0.8-1.0 MPa, and the hot pressing pressure is 1.5-2.0 MPa; the temperature of the first hot pressing is 120-125 ℃; the temperature of the second hot pressing is 115-120 ℃, and the temperature of the third hot pressing is 125-130 ℃; the standing and curing temperature is 80-90 ℃, and the time is 4-6 h.
The adhesive for gluing the thin plate is modified phenolic resin.
The veneer is prepared by sticking paint-free boards or boards with flatness and smoothness on the upper surface or upper and lower surfaces of a plurality of layers of eucalyptus boards, including poplar boards, fir boards and beech boards.
The insect-proof curing film consists of thermosetting resin, insect-proof agent, curing agent and assistant, the thermosetting resin adopts melamine formaldehyde resin, the curing agent is biuret, the insect-proof agent is the combination of chemical insect-proof agent and plant insect-proof agent, and the chemical insect-proof agent is borate (Na)2B4O7·10H2O) and pyrethrin, the weight ratio of borate to pyrethrin is 1: 1; the plant insect repellent adopts coffee grounds, the Baeckea frutescens powder is 1:1, and the weight of the plant insect repellent is 4 times that of the chemical insect repellent;
the curing agent is biuret, and the auxiliary agent comprises glass fiber, organic silicon, titanium dioxide and calcium carbonate; wherein the weight portion of the thermosetting resin is 40-60; 3-8 parts of a curing agent; 2-4 parts of insect-resist agent; the balance of auxiliary agents or fillers.
The auxiliary agent or the filler comprises glass beads, organic silicon, titanium dioxide and calcium carbonate. Wherein the weight portion of the acrylic resin is 50-60; a curing agent 4; auxiliary agents and fillers, namely glass beads, organic silicon, titanium dioxide and calcium carbonate, wherein the balance is 11-13; organic silicon 7, titanium dioxide 6 and ultramicro calcium carbonate powder are added to reach 100 percent.
Example 3
The production method of the multilayer insect-proof eucalyptus board comprises the steps of single board sheet sorting, sheet gluing, three times of cold pressing, three times of hot pressing, two times of standing and health preserving, dust scraping, sanding, repairing, trimming and panel pasting, and is characterized in that: at first cold pressing, repair side cut, first hot pressing and last hot pressing before at the slab surface around with the upper and lower spraying one deck protection against insects solidification membrane, the protection prevents glue at hot pressing in-process too fast drying, and keep the inside stress of multiply wood, can also make it urea-formaldehyde glue fully react completely, the multiply wood intensity after making it the shaping is high, the user use has reduced volatile formaldehyde, panel after the third hot pressing is through the health preserving of stewing, sand light and veneer pasting, can saw the limit packing obtain protection against insects multilayer eucalyptus board product.
The construction mode of the cured film is that the thermosetting resin, the curing agent and the auxiliary agent are made into powder and sprayed on the periphery, the upper surface and the lower surface of the plate blank after being mixed. And firmly attaching the curing film to the outer surface of the plate blank through the high temperature of the hot pressing process.
The cold pressing temperature is room temperature, the pressure is 0.8-1.0 MPa, and the hot pressing pressure is 1.5-2.0 MPa; the temperature of the first hot pressing is 120-125 ℃; the temperature of the second hot pressing is 115-120 ℃, and the temperature of the third hot pressing is 125-130 ℃; the standing and curing temperature is 80-90 ℃, and the time is 4-6 h.
The adhesive for gluing the thin plate is modified phenolic resin.
The veneer is prepared by sticking paint-free boards or boards with flatness and smoothness on the upper surface or upper and lower surfaces of a plurality of layers of eucalyptus boards, including poplar boards, fir boards and beech boards.
The insect-proof curing film is composed of thermosetting resin, an insect-proof agent, a curing agent and an auxiliary agent, wherein the thermosetting resin is acrylic resin, and the curing agent is biuret.
The insect repellent is a combination of chemical insect repellent and plant insect repellent, and the chemical insect repellent is borate (Na)2B4O7·10H2O) and pyrethrin, the weight ratio of borate to pyrethrin is 1: 1; the plant insect repellent adopts the Baeckea powder and the aniseed residues, the proportion of the Baeckea powder to the aniseed residues is 1:1, and the plant insect repellent accounts for 5 times of the weight of the chemical insect repellent;
the auxiliary agent or the filler comprises glass beads, organic silicon, titanium dioxide and calcium carbonate. Wherein the weight portion of the acrylic resin is 50-60; a curing agent 4; auxiliary agents and fillers, namely glass beads, organic silicon, titanium dioxide and calcium carbonate, wherein the balance is 11-13; 6 percent of organic silicon, 4 percent of titanium dioxide and 100 percent of ultramicro calcium carbonate powder.
The characteristics of the insect-proof curing film product added in the invention are compared with those of the product without the reinforced layer:
Figure DEST_PATH_IMAGE003

Claims (6)

1. the production method of the insect-proof multilayer eucalyptus board comprises the steps of single board sheet sorting, sheet gluing, cold pressing, hot pressing, standing, health preserving, dust scraping, sanding, repairing, trimming and panel pasting, and is characterized in that: before the first hot pressing and the last hot pressing, spraying a layer of insect-proof curing film on the periphery and the upper and lower parts of the surface of the plate blank to protect glue from being dried too quickly in the hot pressing process and keep the stress in the multilayer plate, and also enabling urea-formaldehyde glue to be fully reacted completely to prevent insects for the multilayer plate after forming, reducing volatile formaldehyde in the using process of a user, carrying out hot pressing and standing maintenance, sanding and panel pasting on the plate, and carrying out edge sawing and packaging to obtain an insect-proof multilayer eucalyptus plate product;
the insect-proof curing film consists of thermosetting resin, insect-proof agent, curing agent and auxiliary agent, wherein the thermosetting resin adopts melamine formaldehyde resin, furfuryl alcohol resin or acrylic resin;
the insect-resistant agent is the combination of a chemical insect-resistant agent and a plant insect-resistant agent; the plant insect repellant is 3-5 times of the chemical insect repellant;
the curing agent is biuret, and the auxiliary agent comprises glass beads, organic silicon, titanium dioxide and calcium carbonate; wherein the weight portion of the thermosetting resin is 40-60; 3-8 parts of a curing agent; 2-4 parts of insect-resist agent; the balance of auxiliary agents or fillers.
2. The production method of the insect-proof multilayer eucalyptus board as claimed in claim 1, wherein the production method comprises the following steps: the construction mode of the insect-proof curing film is that thermosetting resin, curing agent, insect-proof agent and auxiliary agent are made into powder, and the powder is sprayed on the periphery, upper surface and lower surface of the plate blank after being mixed.
3. The production method of the insect-proof multilayer eucalyptus board as claimed in claim 1, wherein the production method comprises the following steps: the chemical insect-resist agent comprises a mixture of borate and pyrethrin, wherein the weight ratio of the borate to the pyrethrin is 1: 1;
the borate is sodium tetraborate (Na)2B4O7·10H2O);
The plant insect repellent comprises one or more of camphor tree wood powder, roughcast pine powder, anise residue and coffee residue.
4. The production method of the insect-proof multilayer eucalyptus board as claimed in claim 1, wherein the production method comprises the following steps: the cold pressing and the hot pressing are carried out for 2 times or 3 times, the cold pressing temperature is room temperature, the pressure is 0.8-1.0 MPa, and the hot pressing pressure is 1.5-2.0 MPa; the temperature of the first hot pressing is 120-125 ℃; the temperature of the second hot pressing is 115-120 ℃, and the temperature of the third hot pressing is 125-130 ℃; the standing and curing temperature is 80-90 ℃, and the time is 4-6 h.
5. The production method of the insect-proof multilayer eucalyptus board as claimed in claim 1, wherein the production method comprises the following steps: the adhesive for gluing the thin plate is urea-formaldehyde resin or phenolic resin.
6. The production method of the insect-proof multilayer eucalyptus board as claimed in claim 1, wherein the production method comprises the following steps: the veneer is prepared by sticking paint-free boards or boards with flatness and smoothness on the upper surface or upper and lower surfaces of a plurality of layers of eucalyptus boards, including poplar boards, fir boards and beech boards.
CN201911208465.5A 2019-11-30 2019-11-30 Insect-proof multilayer eucalyptus board and production method thereof Pending CN110871477A (en)

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CN114932603A (en) * 2022-06-07 2022-08-23 广西亿松木业有限公司 Preparation method of insect-proof plywood

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CN101643136A (en) * 2008-08-08 2010-02-10 胜狮货柜技术研发(上海)有限公司 Floor board of container
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