CN116811382A - Wood-plastic heterogeneous composite technical wood and preparation method thereof - Google Patents

Wood-plastic heterogeneous composite technical wood and preparation method thereof Download PDF

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Publication number
CN116811382A
CN116811382A CN202310030314.5A CN202310030314A CN116811382A CN 116811382 A CN116811382 A CN 116811382A CN 202310030314 A CN202310030314 A CN 202310030314A CN 116811382 A CN116811382 A CN 116811382A
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China
Prior art keywords
wood
plastic
heterogeneous composite
adhesive
parts
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CN202310030314.5A
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Chinese (zh)
Inventor
刘瑶文
程明娟
吴云刚
彭国青
陈凯
王俊敏
沈建萍
周宝
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Dehua TB New Decoration MaterialsCo Ltd
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Dehua TB New Decoration MaterialsCo Ltd
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Priority to CN202310030314.5A priority Critical patent/CN116811382A/en
Publication of CN116811382A publication Critical patent/CN116811382A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • 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
    • B27D1/04—Joining 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • 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
    • C09J127/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers
    • C09J127/02—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J127/04—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09J127/06—Homopolymers or copolymers of vinyl chloride
    • 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
    • C09J127/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers
    • C09J127/22—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers modified by chemical after-treatment
    • C09J127/24—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers modified by chemical after-treatment halogenated
    • 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
    • C09J161/00—Adhesives based on condensation polymers of aldehydes or ketones; Adhesives based on derivatives of such polymers
    • C09J161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C09J161/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C09J161/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/746—Slipping, anti-blocking, low friction

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a technical wood, in particular to a wood-plastic heterogeneous composite technical wood and a preparation method thereof; belonging to the technical field of veneer lumber. A wood-plastic heterogeneous composite technical wood is formed by arranging a plurality of repeating units, wherein each repeating unit comprises a wood part and a plastic part; and a second adhesive layer is arranged between the wood part and the plastic part. According to the invention, the transparent PVC material and the Alus veneer are laminated in a composite manner to prepare the composite recombined technical wood with good light transmission effect. And a polyvinyl chloride resin adhesive with good PVC bonding effect is selected, so that the toughness and bonding performance of the product are improved. The recombined decorative materials with different thicknesses can be manufactured through slicing, and the diversified consumption requirements can be met.

Description

Wood-plastic heterogeneous composite technical wood and preparation method thereof
Technical Field
The invention relates to a technical wood, in particular to a wood-plastic heterogeneous composite technical wood and a preparation method thereof; belonging to the technical field of veneer lumber.
Background
The wood veneer is produced by using artificial fast-growing wood as raw material and through the steps of veneer bleaching, dyeing, gluing, assembly, compression molding, curing, planing and the like, and has the advantages that the patterns and the colors of natural wood veneers are personalized and customized, and the wood veneer is widely applied to indoor decoration. With the younger consumers of interior decoration, the consumption level and the personalized demand are continuously improved, and the traditional technical wood products can not meet the current aesthetic requirements.
The invention patent application with the application publication number of CN104589740A discloses a PVC composite wood veneer, which comprises an uppermost base plate, an adhesive layer in the middle layer and a lowermost natural wood veneer, wherein the base plate is a PVC plate, the adhesive layer is polyester resin, the natural wood veneer is fraxinus mandshurica, the PVC plate accounts for 60-68% of the total weight, the polyester resin accounts for 15-21% of the total weight, and the fraxinus mandshurica accounts for 13-20% of the total weight. The composite wood veneer has the advantages of sound absorption, sound insulation, fire prevention, flame retardance, heat insulation, heat preservation, energy conservation and insulation.
The uppermost base layer plate of the veneer is the PVC plate, so that the veneer cannot give a solid woody feel when in use, and has a considerable thickness due to multi-layer compounding, and the use occasion is limited to a certain extent.
Disclosure of Invention
The invention aims to solve the problems and provide the wood-plastic heterogeneous composite technical wood which has the characteristics of difficult cracking, good stability and good light transmittance.
The technical aim of the invention is realized by the following technical scheme:
a wood-plastic heterogeneous composite technical wood is formed by arranging a plurality of repeating units, wherein each repeating unit comprises a wood part and a plastic part; and a second adhesive layer is arranged between the wood part and the plastic part.
According to the invention, the composite recombined technical wood with the light-transmitting decorative effect is prepared by compositely laminating the wood and the transparent PVC plate, so that the rigidity and toughness of the product are improved, the product is not easy to crack, the stability is good, and the diversified consumption requirements can be met.
As a preferable aspect of the above-mentioned technical solution, the wood part includes a plurality of wood subunits, and a first adhesive layer is provided between adjacent wood subunits.
As a preferable aspect of the above-mentioned method, the wood part is made of a material of a You Simu, and the plastic part is made of a PVC material.
As a preferable aspect of the foregoing disclosure, the width of the plastic part is 0.5 to 1.5mm, and the width ratio of the wood part to the plastic part is: plastic part= (0.5-2): 1.
The invention also aims to provide a preparation method of the wood-plastic heterogeneous composite technical wood.
A preparation method of wood-plastic heterogeneous composite technical wood comprises the following steps:
a. selecting 1-15 wood veneers for lamination assembly, and coating a first adhesive between the wood veneers; then pressing to prepare a first blank;
b. laminating and assembling the first blank plate and the PVC plate, and coating a second adhesive between the first blank plate and the PVC plate; then pressing and curing to obtain a wood block;
c. planing the wood into wood veneer to obtain the wood-plastic heterogeneous composite technical wood.
Further preferably, the first blank is formed by stacking 10 a You Simu veneers, the thickness of the a you si veneer is smaller than 0.7mm, and the thickness of the first blank layer is smaller than 7mm.
Preferably, the PVC plate is a transparent PVC plate with the thickness of 0.5-1.5 mm.
Preferably, the first adhesive is urea-formaldehyde resin adhesive.
Preferably, the second adhesive is a polyvinyl chloride resin adhesive.
Further preferably, the polyvinyl chloride resin adhesive comprises the following raw materials in parts by weight: 1-5 parts of PVC resin powder, 1-10 parts of CPVC resin powder, 2-10 parts of nano silicon dioxide, 30-50 parts of methylene dichloride, 15-30 parts of DBE solvent, 15-30 parts of dichloropropane, 2-10 parts of ethyl acetate and 0.1-0.5 part of light stabilizer.
Compared with PVC resin, CPVC resin has better heat resistance and can improve the heat resistance of the adhesive. According to the similar compatibility principle, the polyvinyl chloride resin adhesive prepared from CPVC resin powder is mutually dissolved when contacting with PVC plastic base materials, and further diffuses, so that the adhesive effect is improved. The surface of the wood board is provided with hydroxyl functional groups, and the wood board can be chemically adsorbed with CPVC adhesive for adhesion, so that the adhesive effect is good.
Preferably, the CPVC resin powder is CPVC powder with 65-70% of chlorine content.
Preferably, the light stabilizer is one or more of benzophenone, benzotriazole, and hindered amine light stabilizers.
According to the invention, the transparent PVC material and the Alus veneer are laminated in a composite manner to prepare the composite recombined technical wood with good light transmission effect. And a polyvinyl chloride resin adhesive with good PVC bonding effect is selected, so that the toughness and bonding performance of the product are improved. The recombined decorative materials with different thicknesses can be manufactured through slicing, and the diversified consumption requirements can be met.
Preferably, in the step 1, the pressing pressure is 0.6-0.8 MPa, the pressing time is 24-72h, and the curing time is 3-7 days;
preferably, in the step 2, the pressing pressure is 0.6-0.8 MPa, the pressing time is 240-360h, and the curing time is 15-20 days;
preferably, in step 3, the slicing includes: and selecting a high-strength titanium alloy planing knife, wherein the included angle between the advancing direction of the planing knife and the long side of the square is 70-80 degrees, and planing and cutting are performed.
The slicing angle is 70-80 degrees, the contact area between the slicing knife and the wood block is small and uniform, the contact area between the slicing knife and the wood veneer and the PVC plate is small and uniform, the phenomenon of blocking caused by different contact materials of the slicing knife when slicing at a small angle is avoided, and the sliced veneer is smoother and is not easy to crack.
Preferably, the preparation method of the polyvinyl chloride resin adhesive comprises the following steps:
(1) The raw materials of the following components in parts by weight: 1-5 parts of PVC resin powder, 1-10 parts of CPVC resin powder, 2-10 parts of nano silicon dioxide, 30-50 parts of methylene dichloride, 15-30 parts of DBE solvent, 15-30 parts of dichloropropane, 2-10 parts of ethyl acetate and 0.1-0.5 part of light stabilizer;
(2) Uniformly mixing PVC resin powder and CPVC resin powder to obtain a mixture A; uniformly mixing DBE solvent and dichloromethane to prepare a mixed solvent B;
(3) Adding the mixture A into the solvent B, continuously stirring, heating and stirring until the mixture A is completely dissolved to obtain a mixture C;
(4) Adding dichloropropane and ethyl acetate into the mixture C, heating and stirring at 70-80 ℃ for 1-2 hours to obtain a mixture D;
(5) And adding silicon dioxide and a light stabilizer into the mixture D in sequence, and stirring for 0.5-1 hour at 40-50 ℃ to obtain the polyvinyl chloride resin adhesive.
Preferably, in step 1, the weight ratio of PVC powder to CPVC powder is 1:2 to 1:5.
The invention adopts a mixed solvent of DBE solvent, dichloromethane, dichloropropane and ethyl acetate to dissolve PVC and CPVC powder. After uniformly mixing CPVC resin powder and PVC resin powder, primarily dissolving in a mixed solvent of dichloromethane and DBE, and further dissolving by adding a solvent of dichloropropane and ethyl acetate. The polyvinyl chloride resin adhesive prepared from CPVC resin powder is mutually dissolved when contacting with PVC plastic base materials, and further diffuses, so that the adhesive effect is improved. The surface of the wood board is provided with hydroxyl functional groups, and the wood board can be chemically adsorbed with CPVC adhesive for adhesion, so that the adhesive effect is good. Nano silicon dioxide is added in the adhesive to improve the toughness and the shock resistance of the adhesive. Therefore, the polyvinyl chloride resin adhesive prepared by the invention has the properties of high bonding degree and good toughness.
The invention has the following beneficial effects:
1. through the composite lamination of wood and PVC, the recombined technical wood with good light transmission effect is prepared, the toughness of the product is improved, the product is not easy to crack, the stability is good, and the diversified consumption requirements can be met.
2. The CPVC powder with 65-70% of chlorine content is used, has smaller molecular weight and higher solubility in the solvent, and can properly reduce the use amount and the dissolution time of the solvent. Compared with PVC resin, CPVC resin has better heat resistance and can improve the heat resistance of the adhesive. According to the similar compatibility principle, the polyvinyl chloride resin adhesive prepared from CPVC resin powder is mutually dissolved when contacting with PVC plastic base materials, and further diffuses, so that the adhesive effect is improved. The surface of the wood board is provided with hydroxyl functional groups, and the wood board can be chemically adsorbed with CPVC adhesive for adhesion, so that the adhesive effect is good.
3. The invention adopts a mixed solvent of DBE solvent, dichloromethane, dichloropropane and ethyl acetate to dissolve PVC and CPVC powder. The content of dichloromethane in the mixed solvent is about 40-50%, the dichloromethane is a low boiling point solvent, and the volatilization rate is high; dichloropropane and DBE are high boiling solvents with slow volatilization rates. When the content of dichloromethane is increased, the volatilization rate of the mixed solvent is accelerated, the curing rate is accelerated, and the strength is increased; but volatilize too fast, can make adhesive glue solution surface conjunctiva, the inside solvent comes not volatilize to escape, can also make glued membrane surface temperature reduce and condense steam to influence bonding quality and intensity.
4. The slicing angle is 70-80 degrees, the contact area between the slicing knife and the wood block is small and uniform, the contact area between the slicing knife and the wood veneer and the PVC plate is small and uniform, the phenomenon of blocking caused by different contact materials of the slicing knife when slicing at a small angle is avoided, and the sliced veneer is smoother and is not easy to crack.
Drawings
Fig. 1 is a schematic structural view of the present invention:
in the figure, 1-wood part and 2-plastic part.
Detailed Description
The invention is further explained below with reference to the drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Example 1
The preparation method of the polyvinyl chloride resin adhesive comprises the following steps:
s1, uniformly mixing 2 parts of PVC resin powder and 8 parts of CPVC resin powder to form a mixture A; wherein the chlorine content of the CPVC resin powder is 66.8%;
s2, mixing 20 parts of DBE solvent and 45 parts of dichloromethane to prepare a mixed solvent B;
s3, adding the mixture A into the solvent B, continuously stirring, heating to 65 ℃, and stirring for 2 hours to obtain a mixture C;
s4, adding 15 parts of dichloropropane and 5 parts of ethyl acetate into the mixture C, and heating and stirring at 70 ℃ for 1.5 hours to obtain a mixture D;
s5, sequentially adding 5 parts of nano silicon dioxide and 0.2 part of light stabilizer into the mixture D, and stirring for 1h at 40 ℃ to obtain the polyvinyl chloride resin adhesive.
Manufacturing wood-plastic heterogeneous composite technical wood, which comprises the following steps:
k1 15 a You Simu veneers are matched for lamination and assembly, and a first blank plate with the thickness of 6mm is prepared by double-sided coating of a first adhesive and recombination and lamination;
k2, according to the pattern design, compounding and recombining the first blank plate and the PVC plate with the PVC resin adhesive coated on both sides, and pressurizing and preserving to prepare a wood block; the thickness of the PVC plate is 1.5mm, and the glue coating amount is 160 g/square meter. The pressurizing time is 240h, the pressure is 0.6MPa, and the curing is carried out for 20 days, so that the wood-plastic heterogeneous composite technical wood is prepared;
and K3, selecting a high-strength titanium alloy planing knife, wherein the advancing direction of the planing knife and the long side included angle of the square are 70 degrees, and planing and cutting are carried out.
As shown in fig. 1, the wood-plastic heterogeneous composite technical wood is formed by arranging a plurality of repeating units, wherein each repeating unit comprises a wood part 1 and a plastic part 2; and a polyvinyl chloride resin adhesive layer is arranged between the wood part 1 and the plastic part 2. In this embodiment, the wood part 1 includes 15 wood subunits, and a first adhesive layer is disposed between adjacent wood subunits. In this embodiment, the first adhesive is a urea-formaldehyde resin adhesive.
Example 2
The preparation method of the polyvinyl chloride resin adhesive comprises the following steps:
s1, uniformly mixing 2 parts of PVC resin powder and 6 parts of CPVC resin powder to form a mixture A; wherein the chlorine content of the CPVC resin powder is 66.8%;
s2, mixing 20 parts of DBE solvent and 40 parts of dichloromethane to prepare a mixed solvent B;
s3, adding the mixture A into the solvent B, continuously stirring, heating to 65 ℃, and stirring for 2 hours to obtain a mixture C;
s4, adding 20 parts of dichloropropane and 4 parts of ethyl acetate into the mixture C, and heating and stirring at 70 ℃ for 1.5 hours to obtain a mixture D;
s5, sequentially adding 8 parts of nano silicon dioxide and 0.2 part of light stabilizer into the mixture D, and stirring for 1h at 40 ℃ to obtain the polyvinyl chloride resin adhesive.
Manufacturing wood-plastic heterogeneous composite technical wood, which comprises the following steps:
k1 10 a You Simu veneers are matched for lamination and assembly, and a first blank plate with the thickness of 4mm is prepared by double-sided coating of a first adhesive and recombination and lamination;
k2, according to the pattern design, compounding and recombining the first blank plate and the PVC plate with the PVC resin adhesive coated on both sides, and pressurizing and preserving to prepare a wood block; the thickness of the PVC plate is 1mm, and the glue coating amount is 160 g/square meter; the pressurizing time is 240h, the pressure is 0.6MPa, and the curing is carried out for 18 days, so that the wood-plastic heterogeneous composite technical wood is prepared;
and K3, selecting a high-strength titanium alloy planing knife, wherein the advancing direction of the planing knife and the long side included angle of the square are 70 degrees, and planing and cutting are carried out.
The wood-plastic heterogeneous composite scientific and technological wood product is detected by the method:
(1) Comparing the recombined decorative veneer superior products to reach the superior rate of more than 90 percent;
(2) Light fastness: detecting a sample according to GB/T28999-2012, wherein the light fastness of the sample is that the light fastness of the sample is not less than 4 levels after the color degree of the blue wool standard grade 4 reaches the gray card sample card grade 4; the test values of example 1 and example 2 were all of grade 4;
(3) Formaldehyde release amount: the sample is inspected according to GB/T17657-2013, and the formaldehyde release amount of the test piece is less than or equal to 0.2mg/m and reaches E1 level; example 1 detection value 0.4, example 2 detection value 0.3;
(4) Dip stripping (63 ℃): the accumulated stripping length of each side of each adhesive layer of the test piece is not more than 25mm, and the single plate obtained by planing has no cracking phenomenon;
(5) Static bending strength: the longitudinal direction is more than or equal to 50MPa, and the number of qualified test pieces/total number of test pieces is more than or equal to 90 percent.

Claims (10)

1. A wood-plastic heterogeneous composite technical wood is characterized in that: is formed by arranging a plurality of repeating units, wherein each repeating unit comprises a wood part (1) and a plastic part (2); a second adhesive layer is arranged between the wood part (1) and the plastic part (2).
2. A wood-plastic heterogeneous composite technical wood according to claim 1, characterized in that: the wood part (1) comprises a plurality of wood subunits, and a first adhesive layer is arranged between every two adjacent wood subunits.
3. A wood-plastic heterogeneous composite technical wood according to claim 1, characterized in that: the wood part (1) is made of an A You Simu material, and the plastic part (2) is made of PVC material.
4. A wood-plastic heterogeneous composite technical wood according to claim 1, characterized in that: the width of the plastic part (2) is 0.5-1.5 mm, and the width ratio of the wood part (1) to the plastic part (2) is as follows: plastic part= (0.5-2): 1.
5. The method for preparing the wood-plastic heterogeneous composite technical wood according to claim 1, which comprises the following steps:
a. selecting 1-15 wood veneers for lamination assembly, and coating a first adhesive between the wood veneers; then pressing to prepare a first blank;
b. laminating and assembling the first blank plate and the PVC plate, and coating a second adhesive between the first blank plate and the PVC plate; then pressing and curing to obtain a wood block;
c. planing the wood into wood veneer to obtain the wood-plastic heterogeneous composite technical wood.
6. The method for preparing the wood-plastic heterogeneous composite technical wood according to claim 5, which is characterized in that: the first adhesive is urea-formaldehyde resin adhesive; the second adhesive is a polyvinyl chloride resin adhesive.
7. The method for preparing the wood-plastic heterogeneous composite technical wood according to claim 6, which is characterized in that: the polyvinyl chloride resin adhesive comprises the following raw materials in parts by weight: 1-5 parts of PVC resin powder, 1-10 parts of CPVC resin powder, 2-10 parts of nano silicon dioxide, 30-50 parts of methylene dichloride, 15-30 parts of DBE solvent, 15-30 parts of dichloropropane, 2-10 parts of ethyl acetate and 0.1-0.5 part of light stabilizer.
8. The method for preparing the wood-plastic heterogeneous composite technical wood according to claim 7, which is characterized in that: CPVC powder with 65-70% of chlorine content is selected as CPVC resin powder.
9. The method for preparing the wood-plastic heterogeneous composite technical wood according to claim 7, which is characterized in that: the light stabilizer is one or a mixture of more of diphenyl ketone, benzotriazole and hindered amine light stabilizer.
10. The method for preparing the wood-plastic heterogeneous composite technical wood according to claim 5, which is characterized in that:
in the step a, the pressing pressure is 0.6-0.8 MPa, the pressing time is 24-72h, and the curing time is 3-7 days;
in the step b, the pressing pressure is 0.6-0.8 MPa, the pressing time is 240-360h, and the curing time is 15-20 days;
in step c, slicing comprises: and selecting a high-strength titanium alloy planing knife, wherein the included angle between the advancing direction of the planing knife and the long side of the square is 70-80 degrees, and planing and cutting are performed.
CN202310030314.5A 2023-01-10 2023-01-10 Wood-plastic heterogeneous composite technical wood and preparation method thereof Pending CN116811382A (en)

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CN202310030314.5A CN116811382A (en) 2023-01-10 2023-01-10 Wood-plastic heterogeneous composite technical wood and preparation method thereof

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Application Number Priority Date Filing Date Title
CN202310030314.5A CN116811382A (en) 2023-01-10 2023-01-10 Wood-plastic heterogeneous composite technical wood and preparation method thereof

Publications (1)

Publication Number Publication Date
CN116811382A true CN116811382A (en) 2023-09-29

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Country Link
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