CN111086068A - Preparation method of high-strength anticorrosive plywood - Google Patents
Preparation method of high-strength anticorrosive plywood Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/20—Compounds of alkali metals or ammonium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/22—Compounds of zinc or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/36—Aliphatic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J101/00—Adhesives based on cellulose, modified cellulose, or cellulose derivatives
- C09J101/02—Cellulose; Modified cellulose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, 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
- B27K2240/00—Purpose of the treatment
- B27K2240/20—Removing fungi, molds or insects
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Abstract
The invention belongs to the technical field of plywood preparation, and particularly relates to a preparation method of high-strength anticorrosive plywood. According to the invention, cellulose viscose and liquid paraffin are mixed and then subjected to film drawing to obtain a glue film, a composite fiberboard and an anticorrosive wood board material are bonded by using waterproof glue as an intermediate layer to prepare a unit board, then the waterproof glue is used for hot pressing, and then the surface is waxed to obtain the high-strength anticorrosive plywood; the EVA foam is soaked in lime water to improve the waterproof performance, the liquid paraffin and cellulose viscose drawing film are utilized to avoid water absorption expansion and mildew, in addition, calcium oxide can form calcium carbonate in the environment of water and carbon dioxide to improve the strength, and the EVA foam has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of plywood preparation, and particularly relates to a preparation method of high-strength anticorrosive plywood.
Background
The plywood is an important board in the artificial boards, and has the characteristics of small deformation, large breadth, inconvenient construction, difficult warping, large transverse grain tensile strength and the like, widely applied in furniture, carriage, shipbuilding, war industry, packaging and other industrial departments, the wood industry in China is in the process of changing from natural forest wood to artificial forest wood, but the fast-growing wood of the artificial forest is easy to decay, grow worms and mildew, so the wood protection can play a role in prolonging the service life of the wood, reduce the waste of the wood caused by decay and grow worms, improve the quality of wood products and increase the related industries of the functions of the wood products, the plywood can solve the problem of insufficient wood resources, however, the corrosion resistance of the existing plywood is poor, so that the technical problem to be solved is how to scientifically and environmentally perform anticorrosion treatment on the plywood.
With the penetration of technical research, the treated plywood basically can meet the requirement of corrosion resistance, but the anti-microbial invasion performance is poor, and the preservative used for treating the plywood is easy to run off in the using process, so that the service life of the anticorrosive plywood is influenced.
The plywood is an important board in the artificial board, because the plywood has the characteristics of small deformation, large breadth, inconvenient construction, difficult warping, large transverse grain tensile strength and the like, the plywood is widely applied to furniture, carriages, shipbuilding, military industry, packaging and other industrial departments, wherein the main materials comprise bamboo and wood, wherein the sliced veneer bamboo is a novel high-grade veneering decorative material which keeps the special texture of the bamboo, has fresh, natural, simple and elegant texture and performance similar to that of precious hard broad-leaf veneer, and is gradually applied to the fields of artificial boards, furniture and interior decoration, but the existing sliced veneer bamboo has the following defects: firstly, the transverse strength is low, the brittleness is high, the product is easy to break, and great inconvenience is brought to production and transportation; secondly, the breadth is small, and the requirements of veneering decoration of artificial boards, doors, walls and the like on the area are difficult to meet; third, it is a combustible and perishable material, and thus severely limits the range of use of sliced bamboo.
In the prior art, bamboo plywood is generally divided into three types of bamboo woven plywood, bamboo curtain plywood and bamboo plywood, wherein the bamboo curtain plywood is produced by the largest number of manufacturers and has the largest yield, the surface of the bamboo curtain plywood is basically uneven and rough, the surface color is deep, the color difference is large, the thickness deviation is also large, in addition, the bamboo curtain plywood is mainly used as a template of an indoor building, and the existing bamboo curtain plywood can not meet the use requirements of the existing indoor decoration materials.
The plywood is an important board type in the artificial boards, the plywood on the market at present is a three-layer or multi-layer plate-shaped material which is formed by cutting wood sections into single boards or slicing wood squares into thin wood and gluing the single boards by using an adhesive, and the plywood is usually formed by using odd layers of single boards and mutually vertically gluing the fiber directions of the single boards of the adjacent layers; the plywood has good physical and mechanical properties and processability, and is widely used for building decoration, furniture manufacture, wood door manufacture, floor manufacture, and internal decoration of ships and vehicles.
In recent years, the fast-growing eucalyptus tree species which is cultivated in eastern forest lands of Guangxi and Guangdong is introduced in the provinces of China, such as Shuangguang, Yunnan, Fujian, Guizhou, Hainan and the like in southern China, the fast-growing eucalyptus is a light-colored broad-leaved wood, the wood grain is compact and irregular, the sapwood layer is relatively 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 trees grow fast, can grow only in 3 years, farmers in mountainous areas grow in a large quantity, the fast-growing eucalyptus trees account for more than 50% of available timber in south China, in addition, the original tree species such as pine trees, fir trees, chinaberry trees and the like grow slowly, the fast-growing eucalyptus trees can not be cut down in disorder as natural forests, the timber yield of 1 mu of fast-growing eucalyptus trees is equivalent to the natural forest yield of more than 5 mu, the eucalyptus trees only account for 13.7% of the forest area of Guangxi, and the timber 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.
Currently, plywood exists: general strength, poor moisture resistance, general mildew-proof effect and the like.
Therefore, the invention of the excellent plywood has positive significance to the field of manufacturing of artificial boards.
Disclosure of Invention
The invention mainly solves the technical problem and provides a preparation method of a high-strength anticorrosive plywood aiming at the defects that the existing plywood prepared from eucalyptus is poor in moisture resistance, easy to absorb water and expand, mildewed and rotten and low in strength when used as a wood floor.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of high-strength anticorrosive plywood is characterized by comprising the following specific preparation steps:
cutting the composite fiber board and the anticorrosive wood board into boards with the same specification, bonding the boards by using waterproof glue as an intermediate layer to form a unit board, continuously bonding the unit board by using the waterproof glue according to the thickness requirement of the board to obtain a pre-pressed plywood, putting the pre-pressed plywood into a hot press for hot pressing for 5-6 min, cooling to normal temperature, and waxing the surface of the obtained product to obtain the high-strength anticorrosive plywood;
the waterproof adhesive is prepared by the following specific steps:
mixing cellulose viscose and liquid paraffin, placing the mixture in a film drawing machine, drawing the film at a film drawing speed of 60-80 cm/min to obtain a glue film, soaking EVA foam in 20 mass percent lime water for 40-45 min, placing the soaked cotton in a drying oven with a set temperature of 70-80 ℃, drying for 20-25 min to obtain a cotton-shaped waterproof base material, coating the cotton-shaped waterproof base material with the glue film, and placing the cotton-shaped waterproof base material in a molding machine for hot pressing for 20-25 min to obtain a waterproof glue;
the preparation method of the anti-corrosion wood board material comprises the following specific steps:
sawing eucalyptus wood into a plate, placing the plate in a pressure impregnation tank, sealing, applying air pressure for 10-15 min, injecting a wood preservative, boosting the pressure to 0.8-1.5 MPa, keeping the pressure for 50-55 min, reducing the pressure to normal pressure at the speed of 0.08-0.10 MPa/min, and removing the residual preservative to obtain a preservative wood plate;
the preparation steps of the composite fiber board body are as follows:
(1) mixing soybean protein powder and sepiolite fibers, placing the mixture into a high-speed dispersion machine, dispersing the mixture at a high speed of 2000-2500 r/min for 10-15 min to obtain dispersion slurry, carrying out vacuum filtration on the dispersion slurry, removing filtrate to obtain fiber sponge, soaking the fiber sponge in acetone solution of 10% by mass of trimethyl methoxy silane for 4-5 h, drying and pressing to obtain a fiber sponge plate;
(2) mixing SBS rubber powder, asphalt and plant ash, putting the mixture into an oven, heating the mixture to 140-150 ℃, preheating the mixture for 5-7 min, putting the mixture into a rubber mixing mill for plastication to obtain a hot-melt mixture, infiltrating the hot-melt mixture into the fiber sponge board, and cooling the mixture to normal temperature to obtain the composite fiber board.
The hot-pressing pressure of the hot-pressing process in the specific preparation steps of the high-strength anticorrosive plywood is controlled to be 1.5-1.8 MPa, and the hot-pressing temperature is 60-65 ℃.
The mass ratio of the cellulose viscose to the liquid paraffin in the specific preparation step of the waterproof adhesive is 5: 1.
The hot pressing temperature in the hot pressing process in the specific preparation steps of the waterproof adhesive is controlled to be 100-120 ℃, and the hot pressing pressure is 0.5-0.6 MPa.
In the specific preparation step of the anti-corrosion wood plate material, after the pressure of the pressure impregnation tank is applied, the pressure of the pressure impregnation tank is kept at 0.2-0.4 MPa.
In the specific preparation step of the anticorrosive wood board material, the wood preservative is prepared by mixing nano copper oxide, chitosan and triammonium citrate according to a mass ratio of 5: 2: 1, adding distilled water for dilution, and controlling the mass fraction of the nano copper oxide in the obtained wood preservative to be 3-5%.
And (2) mixing the soybean protein powder and the sepiolite fiber in a mixing mass ratio of 1: 5 in the preparation step (1) of the composite fiberboard.
And (2) mixing the SBS rubber powder, the asphalt and the plant ash in the step (1) for preparing the composite fiberboard at a mass ratio of 4: 2: 1.
The specific preparation step (2) of the composite fiberboard is that the set temperature in the plasticator is 180-200 ℃.
The invention has the beneficial effects that:
(1) mixing cellulose viscose and liquid paraffin, drawing a film to obtain a glue film, soaking EVA foam in lime water, drying, coating the glue film, putting the glue film into a molding machine for hot pressing to obtain waterproof glue, preparing a wood preservative by using nano copper oxide, chitosan and triammonium citrate as raw materials, soaking the wood preservative in a wood preservative by using a soaking process to obtain an anticorrosive wood plate, melting SBS rubber powder, asphalt and plant ash for rubber mixing, infiltrating a wood fiber sponge to obtain a composite fiberboard, bonding the composite fiberboard and the anticorrosive wood plate by using the waterproof glue as an intermediate layer to prepare a unit plate, hot pressing the unit plate by using the waterproof glue, and waxing the surface to obtain the high-strength anticorrosive plywood, wherein the plywood comprises the composite fiberboard, the waterproof glue and the anticorrosive wood plate, and the sepiolite fiber sponge plate is used as the composite fiberboard material, so that the adhesion performance of the plywood to the ground can be improved, the floor floating phenomenon is reduced, a plastic EVA foam cotton material is used as a base material of waterproof glue, and a composite fiber board and an anticorrosive wood board are bonded, so that the plywood has good buffering performance, methoxy in trimethyl methoxy silane is easy to hydrolyze and can react with amine substances in a protein adhesive to generate methyl amino alkane substances, the methyl amino alkane substances can perform substitution reaction with potassium ions in composite fiber board additive plant ash to form methyl potassium silicate, and the methyl potassium silicate is a mineral waterproof agent and can react with carbon dioxide in the air to form a waterproof mineral film on the surface of the plywood, so that the moisture resistance of the plywood is improved;
(2) the invention uses lime water to soak EVA foam, because the solidification action of the dried calcium hydroxide in the lime water can generate calcium oxide, the calcium oxide can react with carbon dioxide and water in the air again, so as to play the role of gas isolation and water absorption, when the plywood is used as a wood floor, the accumulation of moisture below the floor can be reduced, the main body part of the liquid paraffin has straight-chain paraffin structure, a large amount of methyl and methylene exist, the bond energy of the methyl and the methylene is larger, and the methyl and the methylene are hydrophobic groups, which is beneficial to improving the waterproof performance, the liquid paraffin and cellulose viscose drawing film are used for preparing the glue film of the waterproof glue, in the process of drawing the film, the liquid paraffin and the hydroxyl in the hygroscopic cellulose viscose are crosslinked, so that the compactness of the liquid paraffin of the surface protective layer of the glue film is improved, the glue film absorbs water, therefore, the glue film is a hydrophobic protective diaphragm, and prevents the water below the plywood from, can avoid water swelling and mildew, in addition, calcium oxide can form partial calcium carbonate in the environment of water and carbon dioxide, the strength of the butt joint between the plywood and the concrete interface is improved, and the plywood has wide application prospect.
Detailed Description
Mixing cellulose viscose and liquid paraffin according to a mass ratio of 5: 1, placing the mixture in a film drawing machine, drawing a film at a film drawing speed of 60-80 cm/min to obtain a glue film, placing EVA foam into lime water with the mass fraction of 20% to soak for 40-45 min, placing the soaked EVA foam in a drying oven with the set temperature of 70-80 ℃, drying for 20-25 min to obtain a cotton-shaped waterproof base material, performing film coating treatment on the cotton-shaped waterproof base material by using the glue film, placing the cotton-shaped waterproof base material in a molding machine, performing hot pressing for 20-25 min, controlling the hot pressing temperature to be 100-120 ℃, and the hot pressing pressure to be 0.5-0.6 MPa to obtain a waterproof glue; sawing eucalyptus wood into a plate, placing the plate in a pressure impregnation tank, sealing, applying air pressure, keeping the pressure of the pressure impregnation tank at 0.2-0.4 MPa for 10-15 min, injecting a wood preservative, boosting the pressure to 0.8-1.5 MPa, keeping the pressure for 50-55 min, reducing the pressure to normal pressure at the speed of 0.08-0.10 MPa/min, removing residual preservative, and obtaining an anticorrosive wood plate, wherein the wood preservative is prepared by mixing nano copper oxide, chitosan and triammonium citrate according to the mass ratio of 5: 2: 1, adding distilled water for dilution, and controlling the mass fraction of the nano copper oxide in the obtained wood preservative to be 3-5% after dilution; mixing soybean protein powder and sepiolite fibers according to a mass ratio of 1: 5, placing the mixture into a high-speed dispersion machine, dispersing the mixture at a high speed of 2000-2500 r/min for 10-15 min to obtain dispersion slurry, carrying out vacuum filtration on the dispersion slurry, removing filtrate to obtain fiber sponge, soaking the fiber sponge in acetone solution of 10% by mass of trimethyl methoxysilane for 4-5 h, drying and pressing to obtain a fiber sponge plate; mixing SBS rubber powder, asphalt and plant ash according to a mass ratio of 4: 2: 1, putting the mixture into an oven, heating to 140-150 ℃, preheating for 5-7 min, putting the mixture into a rubber mixing machine with a set temperature of 180-200 ℃ for plastication to obtain a hot-melt mixture, infiltrating the hot-melt mixture to the fiber sponge plate, and cooling to normal temperature to obtain a composite fiber plate; cutting the composite fiber board and the anticorrosive wood board into boards with the same specification, bonding the boards by using waterproof glue as an intermediate layer to form a unit board, continuously bonding the unit board by using the waterproof glue according to the board thickness requirement to obtain a pre-pressed plywood, putting the pre-pressed plywood into a hot press for hot pressing for 5-6 min, controlling the hot pressing pressure to be 1.5-1.8 MPa and the hot pressing temperature to be 60-65 ℃, cooling to the normal temperature, and waxing the surface of the obtained product to obtain the high-strength anticorrosive plywood.
Example 1
Preparing waterproof glue:
mixing cellulose viscose and liquid paraffin according to a mass ratio of 5: 1, placing the mixture in a film drawing machine, drawing a film at a film drawing speed of 60cm/min to obtain a glue film, placing EVA foam into 20% lime water for soaking for 40min, placing the soaked cotton in a drying oven at a set temperature of 70 ℃, drying for 20min to obtain a cotton-shaped waterproof substrate, performing film coating treatment on the cotton-shaped waterproof substrate by using the glue film, placing the cotton-shaped waterproof substrate in a molding machine for hot pressing for 20min, controlling the hot pressing temperature to be 100 ℃, and controlling the hot pressing pressure to be 0.5MPa to obtain a waterproof glue;
preparing an anticorrosive wood board material:
sawing eucalyptus wood into boards, placing the boards in a pressure impregnation tank, sealing, applying air pressure, keeping the pressure of the pressure impregnation tank at 0.2MPa for 10min, injecting a wood preservative, boosting the pressure to 0.8MPa, keeping the pressure for 50min, reducing the pressure at the speed of 0.08MPa/min to normal pressure, removing residual preservative to obtain the preservative boards, wherein the wood preservative is prepared by mixing nano copper oxide, chitosan and triammonium citrate according to the mass ratio of 5: 2: 1, adding distilled water for dilution, and controlling the mass fraction of the nano copper oxide in the obtained wood preservative to be 3% after dilution;
preparing a fiber sponge board:
mixing soybean protein powder and sepiolite fibers according to a mass ratio of 1: 5, placing the mixture in a high-speed dispersion machine, dispersing the mixture at a high speed of 2000r/min for 10min to obtain dispersion slurry, carrying out vacuum filtration on the dispersion slurry, removing filtrate to obtain fiber sponge, soaking the fiber sponge in acetone solution of 10% by mass of trimethyl methoxysilane for 4h, drying and pressing to obtain a fiber sponge plate;
preparing a composite fiber board:
mixing SBS rubber powder, asphalt and plant ash according to a mass ratio of 4: 2: 1, placing into an oven, heating to 140 ℃, preheating for 5min, placing into a rubber mixing machine with a set temperature of 180 ℃ for plastication to obtain a hot-melt mixture, infiltrating the hot-melt mixture into the fiber sponge board, and cooling to normal temperature to obtain a composite fiber board;
preparing high-strength anticorrosive plywood:
cutting the composite fiber board and the anticorrosive wood board into boards with the same specification, bonding the boards by using waterproof glue as an intermediate layer to form a unit board, continuously bonding the unit board by using the waterproof glue according to the board thickness requirement to obtain a pre-pressed plywood, putting the pre-pressed plywood into a hot press for hot pressing for 5min, controlling the hot pressing pressure to be 1.5MPa and the hot pressing temperature to be 60 ℃, cooling to the normal temperature, and waxing the surface of the obtained product to obtain the high-strength anticorrosive plywood.
Example 2
Preparing waterproof glue:
mixing cellulose viscose and liquid paraffin according to a mass ratio of 5: 1, placing the mixture in a film drawing machine, drawing a film at a film drawing speed of 70cm/min to obtain a glue film, placing EVA foam into lime water with a mass fraction of 20% to soak for 42.5min, placing the soaked cotton in a drying oven with a set temperature of 75 ℃, drying for 22.5min to obtain a cotton-shaped waterproof base material, performing film coating treatment on the cotton-shaped waterproof base material by using the glue film, placing the cotton-shaped waterproof base material in a molding machine, performing hot pressing for 22.5min, controlling the hot pressing temperature to be 110 ℃, and performing hot pressing at a pressure of 0.55MPa to obtain a waterproof glue;
preparing an anticorrosive wood board material:
sawing eucalyptus wood into boards, placing the boards in a pressure impregnation tank, sealing, applying air pressure, keeping the pressure of the pressure impregnation tank at 0.3MPa for 12.5min, injecting a wood preservative, boosting the pressure to 1.15MPa, keeping the pressure for 52.5min, reducing the pressure to normal pressure at the speed of 0.09MPa/min, removing residual preservative to obtain the preservative wood boards, wherein the wood preservative is prepared by mixing nano copper oxide, chitosan and triammonium citrate according to the mass ratio of 5: 2: 1, adding distilled water for dilution, and controlling the mass fraction of the nano copper oxide in the obtained wood preservative to be 4% after dilution;
preparing a fiber sponge board:
mixing soybean protein powder and sepiolite fibers according to a mass ratio of 1: 5, placing the mixture in a high-speed dispersion machine, dispersing the mixture at a high speed of 2250r/min for 12.5min to obtain dispersion slurry, carrying out vacuum filtration on the dispersion slurry, removing filtrate to obtain fiber sponge, soaking the fiber sponge in acetone solution of 10% trimethyl methoxy silane by mass for 4.5h, drying and pressing to obtain a fiber sponge plate;
preparing a composite fiber board:
mixing SBS rubber powder, asphalt and plant ash according to a mass ratio of 4: 2: 1, putting into an oven, heating to 145 ℃, preheating for 6min, putting into a rubber mixing machine with a set temperature of 190 ℃ for plastication to obtain a hot-melt mixture, infiltrating the hot-melt mixture into the fiber sponge board, and cooling to normal temperature to obtain a composite fiber board;
preparing high-strength anticorrosive plywood:
cutting the composite fiber board and the anticorrosive wood board into boards with the same specification, bonding the boards by using waterproof glue as an intermediate layer to form a unit board, continuously bonding the unit board by using the waterproof glue according to the board thickness requirement to obtain a pre-pressed plywood, putting the pre-pressed plywood into a hot press for hot pressing for 5.5min, controlling the hot pressing pressure to be 1.65MPa and the hot pressing temperature to be 62.5 ℃, cooling to the normal temperature, and waxing the surface of the obtained product to obtain the high-strength anticorrosive plywood.
Example 3
Preparing waterproof glue:
mixing cellulose viscose and liquid paraffin according to a mass ratio of 5: 1, placing the mixture in a film drawing machine, drawing a film at a film drawing speed of 80cm/min to obtain a glue film, placing EVA foam into 20% lime water by mass for soaking for 45min, placing the soaked cotton in a drying oven with a set temperature of 80 ℃, drying for 25min to obtain a cotton-shaped waterproof substrate, performing film coating treatment on the cotton-shaped waterproof substrate by using the glue film, placing the cotton-shaped waterproof substrate in a molding machine for hot pressing for 25min, controlling the hot pressing temperature to be 120 ℃, and controlling the hot pressing pressure to be 0.6MPa to obtain waterproof glue;
preparing an anticorrosive wood board material:
sawing eucalyptus wood into boards, placing the boards in a pressure impregnation tank, sealing, applying air pressure, keeping the pressure of the pressure impregnation tank at 0.4MPa for 15min, injecting a wood preservative, boosting the pressure to 1.5MPa, keeping the pressure for 55min, reducing the pressure at the speed of 0.10MPa/min to normal pressure, removing residual preservative to obtain the preservative boards, wherein the wood preservative is prepared by mixing nano copper oxide, chitosan and triammonium citrate according to the mass ratio of 5: 2: 1, adding distilled water for dilution, and controlling the mass fraction of the nano copper oxide in the obtained wood preservative to be 5% after dilution;
preparing a fiber sponge board:
mixing soybean protein powder and sepiolite fibers according to a mass ratio of 1: 5, placing the mixture in a high-speed dispersion machine, dispersing the mixture for 15min at a high speed of 2500r/min to obtain dispersion slurry, carrying out vacuum filtration on the dispersion slurry, removing filtrate to obtain fiber sponge, soaking the fiber sponge in acetone solution of 10% trimethyl methoxysilane by mass for 5h, drying and pressing to obtain a fiber sponge plate;
preparing a composite fiber board:
mixing SBS rubber powder, asphalt and plant ash according to a mass ratio of 4: 2: 1, putting into an oven, heating to 150 ℃, preheating for 7min, putting into a rubber mixing machine with a set temperature of 200 ℃ for plastication to obtain a hot-melt mixture, infiltrating the hot-melt mixture into the fiber sponge board, and cooling to normal temperature to obtain a composite fiber board;
preparing high-strength anticorrosive plywood:
cutting the composite fiber board and the anticorrosive wood board into boards with the same specification, bonding the boards by using waterproof glue as an intermediate layer to form a unit board, continuously bonding the unit board by using the waterproof glue according to the board thickness requirement to obtain a pre-pressed plywood, putting the pre-pressed plywood into a hot press for hot pressing for 6min, controlling the hot pressing pressure to be 1.8MPa and the hot pressing temperature to be 65 ℃, cooling to the normal temperature, and waxing the surface of the obtained product to obtain the high-strength anticorrosive plywood.
Comparative example 1 was prepared substantially the same as example 1 except for the absence of the waterproofing glue.
Comparative example 2 was prepared substantially the same as example 1 except for the absence of a composite fiberboard.
Comparative example 3 plywood manufactured by a company Maanshan.
The plywood of the invention and the comparative example were subjected to performance tests, respectively, and the test results are shown in table 1:
the detection method comprises the following steps:
the static bending strength was measured according to the GB/T9846.7-2004 standard.
The bonding strength and the water absorption expansion rate are measured according to GB/T15036.2-2001 'method for inspecting and testing solid wood floor boards', the plywood is cut into a specification of 80cm (length) × 30cm (width), the plywood is placed in a low-temperature test chamber with the constant temperature of 25 ℃ for 1h, then the low-temperature test chamber is cooled down to-10 ℃ within 2 minutes, the temperature is kept at-10 ℃ for 30min, then the low-temperature test chamber is rapidly heated to 25 ℃, the cracking condition between layers of the plywood and whether the plywood is deformed or not are checked, and the record is carried out according to the cracking deformation condition.
And (3) mildew condition: the plywood in examples 1 to 3 and the comparative example were respectively placed in an environment with an air relative humidity of 75 to 80% and a temperature of 35 to 40 ℃ and left standing for 2 weeks, and the average mildew area ratio of the surfaces was calculated, which was the ratio of the average mildew area per unit area to the average mildew area per unit area of the comparative example.
Table 1 plywood performance measurement results
| Test items | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Static bending strength (MPa) | 58.3 | 59.6 | 61.2 | 41.7 | 43.2 | 45.6 |
| Bonding Strength (MPa) | 1.73 | 1.75 | 1.79 | 1.25 | 1.37 | 1.42 |
| Water swelling Rate (%) | 0.35 | 0.31 | 0.29 | 2.63 | 2.59 | 2.47 |
| Cracking deformation condition | No cracking and deformation | No cracking and deformation | No cracking and deformation | Severe cracking deformation | Severe cracking deformation | Severe cracking deformation |
| Average area ratio of mildew | 0.23 | 0.19 | 0.17 | 0.47 | 0.43 | 0.39 |
As can be seen from the table 1, the high-strength anticorrosive plywood prepared by the invention has the advantages of excellent bonding strength, lower water absorption expansion rate, better moisture resistance, difficult cracking and deformation, difficult mildewing and rotting and wide application prospect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (9)
1. A preparation method of high-strength anticorrosive plywood is characterized by comprising the following specific preparation steps:
cutting the composite fiber board and the anticorrosive wood board into boards with the same specification, bonding the boards by using waterproof glue as an intermediate layer to form a unit board, continuously bonding the unit board by using the waterproof glue according to the thickness requirement of the board to obtain a pre-pressed plywood, putting the pre-pressed plywood into a hot press for hot pressing for 5-6 min, cooling to normal temperature, and waxing the surface of the obtained product to obtain the high-strength anticorrosive plywood;
the waterproof adhesive is prepared by the following specific steps:
mixing cellulose viscose and liquid paraffin, placing the mixture in a film drawing machine, drawing the film at a film drawing speed of 60-80 cm/min to obtain a glue film, soaking EVA foam in 20 mass percent lime water for 40-45 min, placing the soaked cotton in a drying oven with a set temperature of 70-80 ℃, drying for 20-25 min to obtain a cotton-shaped waterproof base material, coating the cotton-shaped waterproof base material with the glue film, and placing the cotton-shaped waterproof base material in a molding machine for hot pressing for 20-25 min to obtain a waterproof glue;
the preparation method of the anti-corrosion wood board material comprises the following specific steps:
sawing eucalyptus wood into a plate, placing the plate in a pressure impregnation tank, sealing, applying air pressure for 10-15 min, injecting a wood preservative, boosting the pressure to 0.8-1.5 MPa, keeping the pressure for 50-55 min, reducing the pressure to normal pressure at the speed of 0.08-0.10 MPa/min, and removing the residual preservative to obtain a preservative wood plate;
the preparation steps of the composite fiber board body are as follows:
(1) mixing soybean protein powder and sepiolite fibers, placing the mixture into a high-speed dispersion machine, dispersing the mixture at a high speed of 2000-2500 r/min for 10-15 min to obtain dispersion slurry, carrying out vacuum filtration on the dispersion slurry, removing filtrate to obtain fiber sponge, soaking the fiber sponge in acetone solution of 10% by mass of trimethyl methoxy silane for 4-5 h, drying and pressing to obtain a fiber sponge plate;
(2) mixing SBS rubber powder, asphalt and plant ash, putting the mixture into an oven, heating the mixture to 140-150 ℃, preheating the mixture for 5-7 min, putting the mixture into a rubber mixing mill for plastication to obtain a hot-melt mixture, infiltrating the hot-melt mixture into the fiber sponge board, and cooling the mixture to normal temperature to obtain the composite fiber board.
2. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: the hot-pressing pressure of the hot-pressing process in the specific preparation steps of the high-strength anticorrosive plywood is controlled to be 1.5-1.8 MPa, and the hot-pressing temperature is 60-65 ℃.
3. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: the mass ratio of the cellulose viscose to the liquid paraffin in the specific preparation step of the waterproof adhesive is 5: 1.
4. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: the hot pressing temperature in the hot pressing process in the specific preparation steps of the waterproof adhesive is controlled to be 100-120 ℃, and the hot pressing pressure is 0.5-0.6 MPa.
5. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: in the specific preparation step of the anti-corrosion wood plate material, after the pressure of the pressure impregnation tank is applied, the pressure of the pressure impregnation tank is kept at 0.2-0.4 MPa.
6. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: the wood preservative in the concrete preparation step of the anti-corrosion wood board material is prepared by mixing nano copper oxide, chitosan and triammonium citrate according to the mass ratio of 5: 2: 1, adding distilled water for dilution, and controlling the content of sodium in the obtained wood preservative after dilution
The mass fraction of the rice copper oxide is 3-5%.
7. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: and (2) mixing the soybean protein powder and the sepiolite fiber in a mixing mass ratio of 1: 5 in the preparation step (1) of the composite fiberboard.
8. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: and (2) mixing the SBS rubber powder, the asphalt and the plant ash in the step (1) for preparing the composite fiberboard at a mass ratio of 4: 2: 1.
9. The method for preparing high-strength anticorrosive plywood according to claim 1, wherein the method comprises the following steps: the specific preparation step (2) of the composite fiberboard is that the set temperature in the plasticator is 180-200 ℃.
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| CN108908533A (en) * | 2018-08-02 | 2018-11-30 | 佛山陵朝新材料有限公司 | A kind of preparation method of the moisture-proof wood floor board for sports ground of buffer-type |
| CN110561849A (en) * | 2019-08-06 | 2019-12-13 | 马少婷 | preparation method of damp-proof buffer material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108908533A (en) * | 2018-08-02 | 2018-11-30 | 佛山陵朝新材料有限公司 | A kind of preparation method of the moisture-proof wood floor board for sports ground of buffer-type |
| CN110561849A (en) * | 2019-08-06 | 2019-12-13 | 马少婷 | preparation method of damp-proof buffer material |
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| CN114714682A (en) * | 2022-04-26 | 2022-07-08 | 南通大富豪纺织科技有限公司 | Corrosion-resistant chemical fiber composite material and production process thereof |
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