CN110593483A - Manufacturing method of light environment-friendly composite wallboard - Google Patents

Manufacturing method of light environment-friendly composite wallboard Download PDF

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Publication number
CN110593483A
CN110593483A CN201910886552.XA CN201910886552A CN110593483A CN 110593483 A CN110593483 A CN 110593483A CN 201910886552 A CN201910886552 A CN 201910886552A CN 110593483 A CN110593483 A CN 110593483A
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China
Prior art keywords
parts
composite wallboard
thin
friendly composite
light environment
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Granted
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CN201910886552.XA
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CN110593483B (en
Inventor
王丽
陈秀兰
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DARE WOOD BASED PANEL GROUP Co Ltd
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DARE WOOD BASED PANEL GROUP Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • 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
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • 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
    • B32B21/047—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 foam
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
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    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/296—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and non-metallic or unspecified sheet-material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/58—Measuring, controlling or regulating
    • B29C2043/5816—Measuring, controlling or regulating temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
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    • B32B2266/0214—Materials belonging to B32B27/00
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32—LAYERED PRODUCTS
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    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
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    • B32B2607/00—Walls, panels
    • B32B2607/02—Wall papers, wall coverings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract

The invention belongs to the technical field of building decoration materials, relates to a composite wallboard, and particularly relates to a manufacturing method of a light environment-friendly composite wallboard, which comprises the following steps: placing the thin formaldehyde-free fiberboard with the surface coated with isocyanate at the bottom of a mold, wherein the spraying surface faces upwards, and uniformly pouring a polyurethane foam material; then placing the other thin formaldehyde-free fiberboard with isocyanate sprayed on the surface in a mold, wherein the sprayed surface of the other thin formaldehyde-free fiberboard is in contact with the polyurethane foaming material; then placing the die in a hot press, wherein the temperature is 60-80 ℃, and the pressure is 20-40 kg/cm2And (5) reacting for 5-15 min, naturally cooling to room temperature, opening the mold, and removing leftover materials to obtain the product. The material used in the invention does not contain formaldehyde, the preparation method has simple and convenient process and no pollution, and the prepared green, healthy and environment-friendly plate is; and the wood fiber board material and the polyurethane foam material are combined properly, so that the prepared composite wallboard has the advantages of better physical and mechanical properties, light weight, no aldehyde, heat preservation, heat insulation, sound insulation and the like, and can be widely applied to the field of indoor wall decoration.

Description

Manufacturing method of light environment-friendly composite wallboard
Technical Field
The invention belongs to the technical field of building decoration materials, relates to a composite wallboard, and particularly relates to a manufacturing method of a light environment-friendly composite wallboard.
Background
With the development of society and the improvement of living standard of people, consumers put forward higher requirements on indoor decoration, in particular to the decoration of wall bodies. The brick wall is composed of two materials of bricks and mortar, and the bricks are cemented together by the mortar to build a wall body or a building block. The brick wall belongs to a masonry wall body and has the advantages of heat preservation, heat insulation, sound insulation and the like. However, the traditional brick wall also has the defects of low construction speed, large dead weight, high labor intensity, difficult carrying and dismantling and the like, and is partially replaced by a novel material.
The invention mainly aims at the defects of the traditional wall body and discloses a preparation method of a light environment-friendly composite wallboard, and the prepared wallboard has the advantages of light weight, no formaldehyde release, heat preservation, heat insulation, sound insulation and the like, and can be widely applied to the field of indoor wall body decoration.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to disclose a preparation method of a light environment-friendly composite wallboard.
A preparation method of a light environment-friendly composite wallboard comprises the following steps:
(1) placing the thin formaldehyde-free fiberboard with the surface coated with isocyanate at the bottom of a mold, wherein the spraying surface faces upwards, and uniformly pouring a polyurethane foam material;
(2) then placing the other thin formaldehyde-free fiberboard with isocyanate sprayed on the surface in a mold, wherein the sprayed surface of the other thin formaldehyde-free fiberboard is in contact with the polyurethane foaming material;
(3) placing the die in a hot press, wherein the temperature is 60-80 ℃, and the pressure is 20-40 kg/cm2And (5) reacting for 5-15 min, naturally cooling to room temperature, opening the mold, and removing leftover materials to obtain the product.
In a preferred embodiment of the invention, the isocyanate is sprayed in the step (1) or (2) in an amount of 80-120 g per square meter, preferably 100 g per square meter.
In the preferred embodiment of the invention, the thickness of the thin aldehyde-free fiberboard in the step (1) or (2) is 1-3 mm, preferably 2 mm.
In the preferred embodiment of the invention, the die in step (3) is placed in a hot press at 70 ℃ and 30kg/cm2The reaction was carried out for 10 min.
In a preferred embodiment of the invention, the polyurethane foam material in the step (1) or (2) is prepared by uniformly stirring and mixing the material A and the material B at a high speed, wherein the material A comprises 100-160 parts by weight, and the material B comprises 100 parts by weight.
Further, the material A is isocyanate;
the material B comprises the following components in parts by mass: 20-100 parts of polyester polyol, 50-100 parts of polyether polyol, 0-5 parts of modified dimethylcyclohexylamine, 0-5 parts of triethanolamine, 0.1-5 parts of dibutyltin dilaurate, 0-5 parts of glycerol, 2-10 parts of sulfonated castor oil, 2-10 parts of polyether modified polysiloxane and 5-20 parts of wood powder.
The preparation method of the material B comprises the following steps: weighing the components according to the proportion, putting polyester polyol, polyether polyol, modified dimethylcyclohexylamine, triethanolamine, dibutyltin dilaurate, glycerol, sulfonated castor oil and polyether modified polysiloxane into a reaction kettle, uniformly stirring and mixing at the rotating speed of 500-700 r/min, putting wood powder into the reaction kettle, and uniformly stirring and mixing at the rotating speed of 500-700 r/min to obtain a material B.
The production steps of the thin aldehyde-free fiberboard comprise: wood peeling → chipping → screening → washing → cooking → hot grinding → fiber drying → glue mixing → paving and shaping → prepressing → hot pressing → cooling → sanding → preserving → inspection and sorting → packaging and warehousing.
In the paving and forming step, the density of paving fibers is adjusted, and the density of the aldehyde-free thin fiberboard is 900-960 kg/m for thin year;
in the glue blending and applying step, the adhesive is isocyanate, and the glue applying amount is 55-65 kg/m for carrying out heavy planting;
in the curing step, the moisture content of the thin aldehyde-free fiberboard is 5.0-6.5% by adjusting the temperature and the humidity of the curing environment.
The light environment-friendly composite wallboard prepared by the method comprises an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer are thin aldehyde-free fiber boards, the middle layer is a polyurethane foam material, and the thickness of the polyurethane foam material is 10-100 mm.
According to the method, the density of the conventional aldehyde-free fiber board is 780-880 kg/m, and the application amount of isocyanate is 25-40 kg/m, the density of the upper surface layer fiber board and the lower surface layer fiber board of the light environment-friendly composite wallboard manufactured by the method is 900-960 kg/m, the application amount of isocyanate is 55-65 kg/m, and the aldehyde-free fiber board with high application amount and high density is used as the upper surface layer and the lower surface layer, so that the density of the core layer polyurethane foaming material can be reduced, the sound absorption effect of the composite wallboard is improved, the performance of the composite wallboard can be guaranteed, and the production cost can be reduced. The glycerol and the sulfonated castor oil are added into the polyurethane foam material, the regularity of the internal molecular structure of the foam material can be damaged properly, the formed cross-linked bonds can limit the slippage between molecular chains, and the deformation resistance of the foam material is improved, so that the performance of the composite wallboard is improved; the polyether modified polysiloxane is added, so that the foaming process is more stable, and the phenomenon that excessive large bubbles generate gaps and delamination is avoided, so that the performance of the composite wallboard is more stable. The sanding powder of the production line is generally used as fuel, and the sanding powder is used as the filler, so that the cost of the polyurethane foam material can be reduced, the porosity of the foam material can be increased, the mechanical property is improved, the energy waste caused by the sanding powder serving as the fuel is avoided, and the effect of saving resources is achieved.
The polyester polyol, the polyether polyol, the modified dimethyl cyclohexylamine, the triethanolamine, the dibutyltin dilaurate, the glycerol, the sulfonated castor oil and the polyether modified polysiloxane are all industrial products; the wood powder is sanding powder in the production of the fiberboard and is crushed to 200-300 meshes.
Advantageous effects
The invention discloses a light environment-friendly composite wallboard, which comprises an upper layer structure, a middle layer structure and a lower layer structure, wherein the upper layer structure and the lower layer structure are high-density thin aldehyde-free fiber boards, and the middle layer structure is a polyurethane foam material. The materials used in the invention do not contain formaldehyde, the preparation method has simple and convenient process and no pollution, and the prepared green, healthy and environment-friendly plate is; and the wood fiber board material and the polyurethane foam material are combined properly, so that the prepared composite wallboard has the advantages of better physical and mechanical properties, light weight, no aldehyde, heat preservation, heat insulation, sound insulation and the like, and can be widely applied to the field of indoor wall decoration.
Detailed Description
The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.
Example 1
A preparation method of a light environment-friendly composite wallboard comprises the following steps of firstly preparing a thin formaldehyde-free fiberboard with the thickness of 2mm, and specifically: wood peeling → chipping → screening → washing → cooking → hot grinding → fiber drying → glue mixing → paving and shaping → prepressing → hot pressing → cooling → sanding → preserving → inspection and sorting → packaging and warehousing.
In the paving and forming step, controlling the density of the thin aldehyde-free fiberboard to be 900kg/m in high speed cultivation by adjusting the paving density;
in the glue blending and applying step, the adhesive is isocyanate, and the glue applying amount is 60kg/m for carrying out high speed cultivation;
in the curing step, the moisture content of the thin aldehyde-free fiberboard is controlled to be 5.0-6.5% by adjusting the temperature and humidity of the curing environment;
and then preparing a polyurethane foam material A and a polyurethane foam material B, and quickly and uniformly mixing the material A and the material B at the rotating speed of 1200-1700 r/min before pouring into a grinding tool to obtain the foam material, wherein 130 parts of the material A and 100 parts of the material B are prepared.
The material A is isocyanate;
the material B comprises the following materials in parts by weight: 20 parts of polyester polyol, 80 parts of polyether polyol, 2 parts of modified dimethylcyclohexylamine, 1 part of triethanolamine, 1 part of dibutyltin dilaurate, 2 parts of glycerol, 2 parts of sulfonated castor oil, 10 parts of polyether modified polysiloxane and 10 parts of wood powder.
The polyester polyol, polyether polyol, modified dimethylcyclohexylamine, triethanolamine, dibutyltin dilaurate, glycerol, sulfonated castor oil and polyether modified polysiloxane are all industrial products; the wood powder is sanding powder in the production of the fiberboard and is crushed to 200-300 meshes;
the preparation method of the material B comprises the following steps: putting polyester polyol, polyether polyol, modified dimethylcyclohexylamine, triethanolamine, dibutyltin dilaurate, glycerol, sulfonated castor oil and polyether modified polysiloxane into a reaction kettle, uniformly mixing at 500-700 r/min, putting wood powder into the reaction kettle, and uniformly mixing at 500-700 r/min to obtain a material B;
finally, a composite wallboard is prepared by the steps comprising:
(1) placing the thin formaldehyde-free fiberboard at the bottom of a grinding tool, and spraying isocyanate on the fiberboard, wherein the spraying amount is 120 g/square meter;
(2) uniformly pouring the foaming material into a grinding tool;
(3) spraying isocyanate on the other fiberboard, wherein the spraying amount is 120 g/square meter, and placing the fiberboard sprayed with the isocyanate in a grinding tool, wherein the isocyanate surface is contacted with the foaming material layer;
(4) placing the grinding tool in a hot press, controlling the thickness of the composite wallboard by a thickness gauge, controlling the temperature of the upper and lower plate surfaces of the press to be 60 ℃, and controlling the pressure to be 30kg/cm2And reacting for 10min to obtain the finished product composite wallboard I.
Example 2
A preparation method of a light environment-friendly composite wallboard comprises the following steps of firstly preparing a thin formaldehyde-free fiberboard with the thickness of 1.5mm, and specifically: wood peeling → chipping → screening → washing → cooking → hot grinding → fiber drying → glue mixing → paving and shaping → prepressing → hot pressing → cooling → sanding → preserving → inspection and sorting → packaging and warehousing.
In the paving and forming step, controlling the density of the aldehyde-free thin fiberboard to be 920kg/m in a high-speed dry-method;
in the glue blending and applying step, the adhesive is isocyanate, and the glue applying amount is 65kg/m for carrying out high speed cultivation;
in the curing step, the moisture content of the thin aldehyde-free fiberboard is controlled to be 5.0-6.5% by adjusting the temperature and humidity of the curing environment;
and then preparing a polyurethane foam material A and a polyurethane foam material B, and quickly and uniformly mixing the material A and the material B at the rotating speed of 1200-1700 r/min before pouring into a grinding tool to obtain the foam material, wherein the material A is 150 parts, and the material B is 100 parts.
The material A is isocyanate;
the material B comprises the following materials in parts by weight: 30 parts of polyester polyol, 70 parts of polyether polyol, 3 parts of modified dimethyl cyclohexylamine, 1 part of dibutyltin dilaurate, 2 parts of glycerol, 3 parts of sulfonated castor oil, 8 parts of polyether modified polysiloxane and 15 parts of wood powder.
The polyester polyol, polyether polyol, modified dimethylcyclohexylamine, dibutyltin dilaurate, glycerol, sulfonated castor oil and polyether modified polysiloxane are all industrial products; the wood powder is sanding powder in the production of the fiberboard and is crushed to 200-300 meshes;
the preparation method of the material B comprises the following steps: putting polyester polyol, polyether polyol, modified dimethylcyclohexylamine, dibutyltin dilaurate, glycerol, sulfonated castor oil and polyether modified polysiloxane into a reaction kettle, uniformly mixing at 500-700 r/min, putting wood powder into the reaction kettle, and uniformly mixing at 500-700 r/min to obtain a material B;
finally, a composite wallboard is prepared by the steps comprising:
(1) placing the thin formaldehyde-free fiberboard at the bottom of a grinding tool, and spraying isocyanate on the fiberboard, wherein the spraying amount is 110 g/square meter;
(2) uniformly pouring the foaming material into a grinding tool;
(3) spraying isocyanate on the other fiberboard, wherein the spraying amount is 110 g/square meter, and placing the fiberboard sprayed with the isocyanate in a grinding tool, wherein the isocyanate surface is contacted with the foaming material layer;
(4) placing the grinding tool in a hot press, controlling the thickness of the composite wallboard by a thickness gauge, controlling the temperature of the upper and lower plate surfaces of the press to be 65 ℃ and the pressure to be 35kg/cm2And reacting for 10min to obtain a finished product of the composite wallboard II.
Table 1 composite wallboard test data
Detecting items Finished composite wallboard 1 Finished composite wallboard II
Density (kg/m dry harvest) 265 260
Thickness (mm) 30 40
Static bending strength (MPa) 13.8 11.6
Internal bond Strength (MPa) 0.69 0.61
Impact resistance (times) 8 9
Air sound insulation volume (dB) 36 45
Heat transfer coefficient (W/square meter K) 1.23 1.06
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (9)

1. A preparation method of a light environment-friendly composite wallboard is characterized by comprising the following steps:
(1) placing the thin formaldehyde-free fiberboard with the surface coated with isocyanate at the bottom of a mold, wherein the spraying surface faces upwards, and uniformly pouring a polyurethane foam material;
(2) then placing the other thin formaldehyde-free fiberboard with isocyanate sprayed on the surface in a mold, wherein the sprayed surface of the other thin formaldehyde-free fiberboard is in contact with the polyurethane foaming material;
(3) placing the die in a hot press, wherein the temperature is 60-80 ℃, and the pressure is 20-40 kg/cm2And (5) reacting for 5-15 min, naturally cooling to room temperature, opening the mold, and removing leftover materials to obtain the product.
2. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the spraying amount of the isocyanate in the step (1) or (2) is 80-120 g per square meter.
3. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the spraying amount of the isocyanate in the step (1) or (2) is 100 g per square meter.
4. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the thickness of the thin aldehyde-free fiberboard in the step (1) or (2) is 1-3 mm.
5. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the thickness of the thin aldehyde-free fiberboard in the step (1) or (2) is 2 mm.
6. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: putting the die into a hot press in the step (3), wherein the temperature is 70 ℃, and the pressure is 30kg/cm2The reaction was carried out for 10 min.
7. The method for preparing the light environment-friendly composite wallboard according to claim 1, is characterized in that: the polyurethane foam material in the step (1) or (2) is prepared by uniformly stirring and mixing a material A and a material B at a high speed, wherein the material A comprises 100-160 parts by weight and the material B comprises 100 parts by weight;
wherein the material A is isocyanate;
the material B comprises the following components in parts by mass: 20-100 parts of polyester polyol, 50-100 parts of polyether polyol, 0-5 parts of modified dimethylcyclohexylamine, 0-5 parts of triethanolamine, 0.1-5 parts of dibutyltin dilaurate, 0-5 parts of glycerol, 2-10 parts of sulfonated castor oil, 2-10 parts of polyether modified polysiloxane and 5-20 parts of wood powder.
8. The lightweight environment-friendly composite wallboard prepared according to the method of any one of claims 1-7.
9. The lightweight, environmentally friendly composite wallboard of claim 8, wherein: the light environment-friendly composite wallboard comprises an upper layer, a middle layer and a lower layer, wherein the upper layer and the lower layer are thin aldehyde-free fiber boards, the middle layer is a polyurethane foam material, and the thickness of the polyurethane foam material is 10-100 mm.
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