CN109720021B - Preparation process of environment-friendly cabinet board - Google Patents
Preparation process of environment-friendly cabinet board Download PDFInfo
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- CN109720021B CN109720021B CN201811518829.5A CN201811518829A CN109720021B CN 109720021 B CN109720021 B CN 109720021B CN 201811518829 A CN201811518829 A CN 201811518829A CN 109720021 B CN109720021 B CN 109720021B
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Abstract
The invention relates to the technical field of cabinet plates, in particular to a preparation process of an environment-friendly cabinet plate, which comprises a decorative layer, a sandwich layer, a foam board core layer and a bottom plate layer which are sequentially compounded, wherein resin reinforcing layers are also compounded between the sandwich layer and the foam board core layer and between the foam board core layer and the bottom plate layer, a plurality of conical bulges are arranged on the compounded side surface of the resin reinforcing layer and the foam board core layer, and waterproof flame-retardant coating is sprayed on the surface of the environment-friendly cabinet plate.
Description
Technical Field
The invention relates to the technical field of cabinet plates, in particular to a preparation process of an environment-friendly cabinet plate.
Background
Along with the improvement of living standard of people, the quality and the requirement of furniture are improved, and wood boards are the main materials used in the existing furniture, cabinets and the like, but the requirements of people on the furniture are not limited to the beauty, practicability, waterproofness, mildew resistance, fire resistance, insect prevention and the like of the furniture, and more attention is paid to whether the furniture contains pollutant formaldehyde. The formaldehyde in the decoration materials and furniture is not easy to be scattered, so that the formaldehyde in the room is overproof, the environment is damaged, the human body is greatly injured, the health and development of pregnant women and children are particularly seriously affected, the fetal deformity, the intelligence development of the children are blocked, the respiratory tract of adults is stimulated, and the like are easily caused.
Most of the prior materials used for decoration and furniture are urea-formaldehyde resin or modified urea-formaldehyde glue which has the characteristics of high bonding strength and difficult glue opening but can generate formaldehyde release under certain conditions.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the preparation process of the environment-friendly cabinet plate, the preparation method is simple to operate, the stability of the preparation process is good, the processing is easy, the prepared cabinet plate is environment-friendly, pollution-free and formaldehyde-free, and the prepared cabinet plate has low water absorption rate and excellent tensile property and impact resistance.
The purpose of the invention is realized by the following technical scheme: the preparation process of the environment-friendly cabinet board comprises a decorative layer, a sandwich layer, a foam board core layer and a bottom board layer which are sequentially compounded, wherein resin reinforcing layers are also compounded between the sandwich layer and the foam board core layer and between the foam board core layer and the bottom board layer, a plurality of conical bulges are arranged on the side surface of the resin reinforcing layer compounded with the foam board core layer, and waterproof flame-retardant coating is sprayed on the surface of the environment-friendly cabinet board;
the preparation process of the environment-friendly cabinet board comprises the following steps:
coating epoxy resin on the surfaces of the sandwich plate layer and the bottom plate layer;
compounding the side surface of the clamping plate layer coated with the epoxy resin and the side surface of the resin reinforcing layer far away from the conical bulge to prepare a first composite plate, and compounding the side surface of the bottom plate layer coated with the epoxy resin and the side surface of the other resin reinforcing layer far away from the conical bulge to prepare a second composite plate;
placing the foaming board core layer between the first composite board and the second composite board, enabling the foaming board core layer to be attached to the two resin reinforcing layers, and then performing prepressing fixation to obtain a third composite board;
coating epoxy resin on one side surface of the decorative layer, then compounding the side surface of the decorative layer coated with the epoxy resin with the sandwich plate layer of the third composite plate, then prepressing and fixing, and finally forming;
and fifthly, spraying waterproof flame-retardant coating on the surface of the composite board formed in the fourth step, and finally drying to obtain the environment-friendly cabinet board.
The invention adopts the epoxy resin as the adhesive to replace urea-formaldehyde resin, so that the prepared cabinet board has no formaldehyde release, no harm to human body, environmental protection and safety. The foaming board core layer with excellent shock resistance and the resin reinforcing layer with high strength are compounded, and when the resin reinforcing layer and the foaming board core layer are prepressed and fixed, the conical protrusions on the surface of the resin reinforcing layer are pressed into the foaming board core layer under the conditions of high temperature and high pressure, so that the bonding strength between the resin reinforcing layer and the foaming board core layer and the overall strength of the cabinet board are improved, and the prepared cabinet board is excellent in mechanical property and stable in structure. According to the invention, the interlayer layer, the resin reinforcing layer, the foam board core layer and the bottom board layer are firstly laminated, and then the decorative layer is fixed, so that the decorative layer can be prevented from being damaged by overhigh laminating force and temperature, and the yield of the cabinet board is improved. The preparation method provided by the invention is simple to operate, the stability of the preparation process is good, the processing is easy, and the prepared cabinet board is environment-friendly, pollution-free and formaldehyde-free, and has low water absorption and flame retardant property.
The preparation method of the foam board core layer comprises the following steps:
A. weighing 20-30 parts by weight of polyvinyl chloride resin, 10-25 parts by weight of epoxy resin, 65-80 parts by weight of wood powder, 5-10 parts by weight of reinforcing filler, 3-5 parts by weight of toughening modifier, 4-8 parts by weight of lubricant, 2-3 parts by weight of anti-aging agent and 4-8 parts by weight of foaming agent;
B. respectively grinding the raw materials in the step A to prepare powder;
C. mixing the ground raw materials, heating and stirring uniformly, and then cooling to obtain a mixture;
D. and C, putting the mixture prepared in the step C into an extrusion device for high-temperature mixing and melting, extruding the melt into a plate shaping container for foaming and shaping, and preparing the foamed plate core layer.
By adopting the raw materials in the weight ratio, the prepared foam board has the advantages of uniform foaming of the core layer, excellent impact resistance, high strength, small density, light weight and good moisture resistance, heat preservation and ageing resistance. According to the invention, the polyvinyl chloride resin and the wood powder are mixed with other raw materials, so that the prepared composite material can be extruded into foam after mixing, the epoxy resin can be crosslinked with the polyvinyl chloride resin, the bonding strength, the adhesive force and the chemical resistance of the composite material are improved, the adhesive force between the foaming board core layer and the resin reinforcing layer is improved, the integral strength of the prepared cabinet plate is higher, the composite material can have the mould resistance, and the environmental protection performance of the cabinet plate is improved. The foaming agent enables a polyvinyl chloride resin and epoxy resin composite system to be uniformly foamed, and the reinforcing filler and the toughening modifier simultaneously perform reinforcing toughening modification on the polyvinyl chloride resin and epoxy resin composite system, so that the prepared foamed board core layer has high toughness, high rigidity, excellent impact resistance and tensile strength.
According to the invention, the raw material powders are heated, mixed and cooled, so that other raw material components form a protective layer on the surface of the wood powder particles, the protective layer can prevent the wood powder particles from being carbonized when being subjected to high-temperature melt mixing in an extrusion device, and the protective layer coated on the surface of the wood powder particles can be solidified by cooling, so that the protective effect of the wood powder particles is improved. The powdery raw materials are mixed more uniformly, so that the foaming uniformity, the impact resistance, the aging resistance, the tensile strength and the hardness of the core layer of the foaming board can be improved.
Wherein the reinforcing filler is a mixture of glass fiber and nano-silica in a weight ratio of 2-3: 1.
According to the invention, the glass fiber and the nano-silica in the weight ratio are used as the reinforcing filler to be filled in the composite material, the reinforcing filler is uniformly mixed with other raw material components, so that the tensile strength and the hardness of the core layer of the foam board can be improved, when the glass fiber and the nano-silica are mixed in the composite material, part of the nano-silica can wrap the surface of the glass fiber, and when the board is impacted, part of the glass fiber is easily pulled out of the composite material, so that the toughness of the board is improved, therefore, the composite reinforcing filler can improve the tensile strength and the hardness of the board, and simultaneously can improve the toughness of the board and the impact resistance of the board.
Specifically, the length of the glass fiber is 1-3 μm, the particle size of the nano silicon dioxide is 50-100nm, when the length of the glass fiber is less than 1 micron, the bonding force between the glass fiber and the resin matrix is low, the tensile strength of the prepared foam board core layer is reduced, and when the length of the glass fiber is more than 3 μm, the too long glass fiber can affect the foaming effect of the board, and the foaming is not uniform.
Wherein the toughening modifier is a mixture of chlorinated polyethylene and maleic anhydride grafted polypropylene in a weight ratio of 3-4: 2.
According to the invention, chlorinated polyethylene and maleic anhydride grafted polypropylene are adopted, and the weight ratio of the chlorinated polyethylene to the maleic anhydride grafted polypropylene is strictly controlled to be used as a toughening modifier, so that the chlorinated polyethylene to the maleic anhydride grafted polypropylene and the maleic anhydride grafted polypropylene are synergistic, the dispersibility among the reinforcing filler, polyvinyl chloride, wood powder, epoxy resin, an anti-aging agent and a foaming agent is improved, the compatibility among the raw material components is improved, a cross-linked network structure is formed between the chlorinated polyethylene and the polyvinyl chloride to absorb impact force, and the toughness and the impact resistance of the board are further improved.
Wherein the lubricant is at least one of stearic acid, butyl stearate, oleamide, ethylene bis stearamide and polyethylene wax.
The lubricant can prevent the composite material from being adhered to the wall of the charging barrel in the mixing process, inhibit the friction and heat generation of raw materials and equipment, reduce the mixing torque and load, and prevent the thermal degradation of the composite material; improves the fluidity during extrusion molding, improves the adhesion of the composite raw material to a charging barrel and a die, and prevents and reduces the retention.
Wherein the particle diameter of the powder particles ground in the step B is 1-200 μm.
According to the invention, the raw material components are prepared into powder particles with the particle size of 1-200 mu m, so that the dispersibility of the raw materials can be improved, the wood powder and the raw materials are uniformly mixed, the wood powder is coated by resin materials and other raw material powder to form a protective layer, the wood powder is prevented from being carbonized in a high-temperature mixing process, and the foaming performance and the mechanical strength of the foamed board are reduced.
Wherein the temperature during heating and stirring in the step C is 50-100 ℃, and the cooling temperature is 10-20 ℃.
The temperature is more favorable for coating the wood powder by resin and other raw materials and curing the wood powder on the surface to form a protective film, so that the wood powder is prevented from being carbonized. When the stirring temperature in the step C is higher than 100 ℃, the resin and other raw materials do not form a protective layer on the surface of the wood powder, the wood powder is carbonized, the subsequent manufacturing of the foamed board core layer is influenced, when the temperature is too low, the resin and other raw materials cannot form a protective film on the surface of the wood powder, the wood powder is easily carbonized during high-temperature mixing, the performance of the manufactured foamed board core layer is influenced, and the composite material cannot be foamed after mixing and extrusion.
And D, wherein the temperature of the plate shaping container in the step D is 1-10 ℃.
The invention extrudes the melt after high-temperature mixing into a cooled plate shaping container, the melt foams and expands in the plate shaping container with larger space, the part of the melt contacting with the plate shaping container can not foam due to too low temperature to form a smooth and compact skin layer, and the melt far away from the surface of the plate shaping container can expand and foam immediately after extrusion due to high temperature to form a foam board core layer with an upper skin layer, a lower skin layer and a middle foam layer.
Wherein the height of the conical projection on the surface of the resin reinforcing layer is 1-2 mm.
The arch of the toper form of 1-2mm height inserts the epidermis in the foaming board sandwich layer more easily at high temperature pressfitting in-process, improve the cohesion between foaming board sandwich layer and the resin enhancement layer, improve the bulk strength of cupboard panel simultaneously, the protruding short-term excessively of toper on resin enhancement layer surface, the cohesion between resin enhancement layer and the foaming board sandwich layer is low excessively, can reduce cupboard panel overall structure's stability, and the protruding long-term excessively of toper, the protruding epidermis that passes the foaming board sandwich layer easily, destroy the foaming layer structure of foaming board sandwich layer, reduce the dampproofing of foaming board sandwich layer, heat preservation effect and impact strength.
The conical protrusion on the surface of the resin reinforcing layer is at least one of silicon nitride, aluminum nitride and silicon dioxide.
When the raw materials are used as the bulges on the surface of the resin reinforcing layer, the strength is high, and the overall strength, the structural stability and the impact resistance of the cabinet plate are improved.
Wherein, the pre-pressing fixed pressure in the third step is 40-50MPa, then the temperature is increased to 200-.
The invention is pressed for 0.5-1h at the temperature of 200-300 ℃ under the pressing force of 40-50MPa, so that the sandwich layer, the reinforcing layer, the foam board core layer and the bottom board layer are tightly combined in pairs, the resin reinforcing layer is softened under the high-temperature condition, the partially softened resin base material is in cross-linking combination with the foam board core layer under the action of pressure, the surface skin of the foam board core layer is tightly combined with the resin reinforcing layer, when the pressure is too small, the conical bulge on the surface of the resin reinforcing layer is difficult to be pressed into the surface skin of the foam board core layer, and when the pressure is too large, the sandwich layer and the bottom board layer can be damaged by the excessive pressure.
Wherein, the pressure of the pre-pressing and fixing in the fourth step is 25-30MPa, the temperature is 100-150 ℃, and the pressing is carried out for 0.5-1 h.
The invention is pressed for 0.5-1h at the temperature of 100-150 ℃ under the pressing force of 25-30MPa, so that the decorative layer, the sandwich layer, the reinforcing layer, the foam board core layer and the bottom board layer are tightly combined to form the board with stable structure.
And C, drying at 85-150 ℃ for 1-2 h.
The waterproof flame-retardant coating adopts a CPU polyurethane flame-retardant waterproof coating of Shaoxing Cornshi building materials Co.
The resin reinforcing layer comprises the following raw materials in parts by weight:
wherein the particle size of the silicon dioxide hollow glass sphere is 100-300nm, and the particle size of the nano titanium dioxide is 50-150 nm.
Preferably, the compatibilizer is at least one of maleic anhydride grafted polypropylene, hydrogenated styrene-butadiene-styrene copolymer grafted glycidyl methacrylate, ethylene-methyl acrylate grafted glycidyl methacrylate, and styrene-acrylonitrile copolymer grafted glycidyl methacrylate.
The resin reinforcing layer of the invention adopts the raw material components and strictly controls the weight ratio of the components, so that the prepared resin reinforcing layer has excellent impact resistance, tensile strength, surface hardness and antibacterial property. The silica hollow glass spheres and the nano titanium dioxide are simultaneously added into the resin matrix, so that the tensile strength and the impact strength of the resin matrix can be improved to the same extent, and the dispersion performance of the composite material can be improved by adopting the silica hollow glass spheres and the nano titanium dioxide with the particle sizes, so that the raw materials are mixed more uniformly, and the comprehensive performance of the resin reinforcing layer is improved.
The invention has the beneficial effects that: the preparation method provided by the invention is simple to operate, the stability of the preparation process is good, the processing is easy, and the prepared cabinet board is environment-friendly, pollution-free and formaldehyde-free, and has low water absorption rate and excellent tensile property and impact resistance. The formaldehyde content is not over standard, and the release amount is 0.002-0.006mg/m3The release amount is extremely low, the effect of no formaldehyde release is basically achieved, the environment is protected, no pollution is caused to the environment, and no harm is caused to the health of human bodies. The hardness is between 1680-The tensile strength is between 50 and 56MPa, and the impact strength is between 23 and 32KJ/m2And the mechanical property is good.
Drawings
Fig. 1 is a schematic view showing the structure of the cabinet sheet of the present invention.
Description of reference numerals: 1. a decorative layer; 2. a plywood layer; 3. a resin reinforcing layer; 4. a conical projection; 5. a foam board core layer; 6. a floor layer.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and the accompanying fig. 1, and the description of the embodiments is not intended to limit the present invention.
Example 1
A preparation process of an environment-friendly cabinet plate comprises a decorative layer 1, a sandwich layer 2, a foaming board core layer 5 and a bottom plate layer which are sequentially compounded, wherein a resin reinforcing layer 3 is also compounded between the sandwich layer 2 and the foaming board core layer 5 and between the foaming board core layer 5 and the bottom plate layer, a plurality of conical bulges 4 are arranged on the compounded side surface of the resin reinforcing layer 3 and the foaming board core layer 5, and waterproof flame-retardant paint is sprayed on the surface of the environment-friendly cabinet plate; the thickness of the prepared environment-friendly cabinet plate is 2cm, and the bottom plate layer and the clamping plate layer 2 are made of cheap thin wood plates.
The preparation process of the environment-friendly cabinet board comprises the following steps:
coating epoxy resin on the surfaces of the sandwich plate layer 2 and the bottom plate layer;
compounding the side surface of the clamp plate layer 2 coated with the epoxy resin and the side surface of the resin reinforcing layer 3 far away from the conical bulge 4 to obtain a first composite plate, and compounding the side surface of the bottom plate layer coated with the epoxy resin and the side surface of the other resin reinforcing layer 3 far away from the conical bulge 4 to obtain a second composite plate;
placing the foam board core layer 5 between the first composite board and the second composite board, attaching the foam board core layer 5 and the two resin reinforcing layers 3, then pre-pressing and fixing, wherein the pressure of the pre-pressing and fixing is 45MPa, then heating to 250 ℃, pressing for 0.75h, finally cooling to 125 ℃, and curing and forming to obtain a third composite board;
coating epoxy resin on one side surface of the decorative layer 1, then compounding the side surface of the decorative layer 1 coated with the epoxy resin with the sandwich layer 2 of the third composite board, prepressing and fixing at the pressure of 27.5MPa and the temperature of 125 ℃, and pressing for 0.75h, and finally forming;
and step five, spraying waterproof flame-retardant coating on the surface of the composite board formed in the step four, and finally drying at the drying temperature of 117 ℃ for 1.5 hours to obtain the environment-friendly cabinet board.
The preparation method of the foam board core layer 5 comprises the following steps:
A. weighing 25 parts by weight of polyvinyl chloride resin, 17.5 parts by weight of epoxy resin, 72.5 parts by weight of wood powder, 7.5 parts by weight of reinforcing filler, 4 parts by weight of toughening modifier, 6 parts by weight of lubricant, 2.5 parts by weight of anti-aging agent and 6 parts by weight of foaming agent;
B. respectively grinding the raw materials in the step A to prepare powder, wherein the particle size of powder particles is 100 mu m;
C. mixing the ground raw materials, heating to 75 ℃, uniformly stirring, cooling to 15 ℃, and cooling to obtain a mixture;
D. and C, putting the mixture prepared in the step C into an extrusion device for high-temperature mixing and melting, extruding the melt into a plate shaping container for foaming and shaping, and preparing the foamed plate core layer 5. Wherein the temperature of the plate shaping container is 5 ℃.
The reinforcing filler is a mixture of glass fiber and nano-silica in a weight ratio of 2.5: 1.
The length of the glass fiber is 2 mu m, the grain diameter of the nano silicon dioxide is 75nm, the toughening modifier is a mixture of chlorinated polyethylene and maleic anhydride grafted polypropylene according to the weight ratio of 3.5:2, and the lubricant is stearic acid
The height of the conical protrusion 4 on the surface of the resin reinforcing layer 3 is 1.5mm, and the conical protrusion 4 on the surface of the resin reinforcing layer 3 is silicon nitride.
The waterproof flame-retardant coating adopts a CPU polyurethane flame-retardant waterproof coating of Shaoxing Cornshi building materials Co.
The resin reinforced layer 3 comprises the following raw materials in parts by weight:
wherein the particle size of the silicon dioxide hollow glass sphere is 200nm, the particle size of the nano titanium dioxide is 100nm, the compatilizer is maleic anhydride grafted polypropylene, and the anti-aging agent is a mixture of an ultraviolet absorbent UV-P and an antioxidant 1010 according to the weight ratio of 1: 1.
Example 2
A preparation process of an environment-friendly cabinet plate comprises a decorative layer 1, a sandwich layer 2, a foaming board core layer 5 and a bottom plate layer which are sequentially compounded, wherein a resin reinforcing layer 3 is also compounded between the sandwich layer 2 and the foaming board core layer 5 and between the foaming board core layer 5 and the bottom plate layer, a plurality of conical bulges 4 are arranged on the compounded side surface of the resin reinforcing layer 3 and the foaming board core layer 5, and waterproof flame-retardant paint is sprayed on the surface of the environment-friendly cabinet plate; the thickness of the prepared environment-friendly cabinet plate is 1.5cm, and the bottom plate layer and the clamping plate layer 2 are made of cheap thin wood plates.
The preparation process of the environment-friendly cabinet board comprises the following steps:
coating epoxy resin on the surfaces of the sandwich plate layer 2 and the bottom plate layer;
compounding the side surface of the clamp plate layer 2 coated with the epoxy resin and the side surface of the resin reinforcing layer 3 far away from the conical bulge 4 to obtain a first composite plate, and compounding the side surface of the bottom plate layer coated with the epoxy resin and the side surface of the other resin reinforcing layer 3 far away from the conical bulge 4 to obtain a second composite plate;
placing the foam board core layer 5 between the first composite board and the second composite board, attaching the foam board core layer 5 and the two resin reinforcing layers 3, then pre-pressing and fixing, wherein the pressure of the pre-pressing and fixing is 40MPa, then heating to 200 ℃, pressing for 0.5h, finally cooling to 100 ℃, and curing and forming to obtain a third composite board;
coating epoxy resin on one side surface of the decorative layer 1, then compounding the side surface of the decorative layer 1 coated with the epoxy resin with the sandwich layer 2 of the third composite board, prepressing and fixing at the pressure of 25MPa and the temperature of 100 ℃ for 0.5h, and finally molding;
and step five, spraying waterproof flame-retardant coating on the surface of the composite board formed in the step four, and finally drying at the drying temperature of 85 ℃ for 1h to obtain the environment-friendly cabinet board.
The preparation method of the foam board core layer 5 comprises the following steps:
A. weighing 20 parts by weight of polyvinyl chloride resin, 10 parts by weight of epoxy resin, 65 parts by weight of wood powder, 5 parts by weight of reinforcing filler, 3 parts by weight of toughening modifier, 4 parts by weight of lubricant, 2 parts by weight of anti-aging agent and 4 parts by weight of foaming agent;
B. respectively grinding the raw materials in the step A to prepare powder, wherein the particle size of powder particles is 1 mu m;
C. mixing the ground raw materials, heating to 50 ℃, uniformly stirring, cooling to 10 ℃, and cooling to obtain a mixture;
D. and C, putting the mixture prepared in the step C into an extrusion device for high-temperature mixing and melting, extruding the melt into a plate shaping container for foaming and shaping, and preparing the foamed plate core layer 5. Wherein the temperature of the plate shaping container is 1 ℃.
The reinforcing filler is a mixture of glass fiber and nano-silica in a weight ratio of 2:1, the length of the glass fiber is 1 mu m, the particle size of the nano-silica is 50nm, the toughening modifier is a mixture of chlorinated polyethylene and maleic anhydride grafted polypropylene in a weight ratio of 3:2, and the lubricant is butyl stearate.
The height of the conical projection 4 on the surface of the resin reinforcing layer 3 is 1mm, and the conical projection 4 on the surface of the resin reinforcing layer 3 is aluminum nitride.
The waterproof flame-retardant coating adopts a CPU polyurethane flame-retardant waterproof coating of Shaoxing Cornshi building materials Co.
The resin reinforced layer 3 comprises the following raw materials in parts by weight:
wherein the particle size of the silicon dioxide hollow glass sphere is 100nm, the particle size of the nano titanium dioxide is 50nm, the compatilizer is hydrogenated styrene-butadiene-styrene copolymer grafted glycidyl methacrylate, and the anti-aging agent is an ultraviolet absorbent UV-P.
Example 3
A preparation process of an environment-friendly cabinet plate comprises a decorative layer 1, a sandwich layer 2, a foaming board core layer 5 and a bottom plate layer which are sequentially compounded, wherein a resin reinforcing layer 3 is also compounded between the sandwich layer 2 and the foaming board core layer 5 and between the foaming board core layer 5 and the bottom plate layer, a plurality of conical bulges 4 are arranged on the compounded side surface of the resin reinforcing layer 3 and the foaming board core layer 5, and waterproof flame-retardant paint is sprayed on the surface of the environment-friendly cabinet plate; the thickness of the prepared environment-friendly cabinet plate is 2cm, and the bottom plate layer and the clamping plate layer 2 are made of cheap thin wood plates.
The preparation process of the environment-friendly cabinet board comprises the following steps:
coating epoxy resin on the surfaces of the sandwich plate layer 2 and the bottom plate layer;
compounding the side surface of the clamp plate layer 2 coated with the epoxy resin and the side surface of the resin reinforcing layer 3 far away from the conical bulge 4 to obtain a first composite plate, and compounding the side surface of the bottom plate layer coated with the epoxy resin and the side surface of the other resin reinforcing layer 3 far away from the conical bulge 4 to obtain a second composite plate;
placing the foam board core layer 5 between the first composite board and the second composite board, attaching the foam board core layer 5 and the two resin reinforcing layers 3, then pre-pressing and fixing, wherein the pressure of the pre-pressing and fixing is 50MPa, then heating to 300 ℃, pressing for 1h, and finally cooling to 150 ℃, and curing and molding to obtain a third composite board;
coating epoxy resin on one side surface of the decorative layer 1, then compounding the side surface of the decorative layer 1 coated with the epoxy resin with the sandwich layer 2 of the third composite board, prepressing and fixing at the pressure of 30MPa and the temperature of 150 ℃ for 1h, and finally molding;
and fifthly, spraying waterproof flame-retardant coating on the surface of the composite board formed in the fourth step, and finally drying at the drying temperature of 150 ℃ for 2 hours to obtain the environment-friendly cabinet board.
The preparation method of the foam board core layer 5 comprises the following steps:
A. weighing 30 parts by weight of polyvinyl chloride resin, 25 parts by weight of epoxy resin, 80 parts by weight of wood powder, 10 parts by weight of reinforcing filler, 5 parts by weight of toughening modifier, 8 parts by weight of lubricant, 3 parts by weight of anti-aging agent and 8 parts by weight of foaming agent;
B. respectively grinding the raw materials in the step A to prepare powder, wherein the particle size of powder particles is 200 mu m;
C. mixing the ground raw materials, heating to 100 ℃, uniformly stirring, cooling to 20 ℃, and cooling to obtain a mixture;
D. and C, putting the mixture prepared in the step C into an extrusion device for high-temperature mixing and melting, extruding the melt into a plate shaping container for foaming and shaping, and preparing the foamed plate core layer 5. Wherein the temperature of the plate shaping container is 10 ℃.
The reinforcing filler is a mixture of glass fibers and nano-silica in a weight ratio of 3:1, the length of the glass fibers is 3 mu m, the particle size of the nano-silica is 100nm, the toughening modifier is a mixture of chlorinated polyethylene and maleic anhydride grafted polypropylene in a weight ratio of 4:2, and the lubricant is ethylene bis-stearamide.
The height of the conical projection 4 on the surface of the resin reinforcing layer 3 is 2mm, and the conical projection 4 on the surface of the resin reinforcing layer 3 is silicon dioxide.
The waterproof flame-retardant coating adopts a CPU polyurethane flame-retardant waterproof coating of Shaoxing Cornshi building materials Co.
The resin reinforced layer 3 comprises the following raw materials in parts by weight:
wherein the particle size of the silicon dioxide hollow glass ball is 300nm, the particle size of the nano titanium dioxide is 150nm, and the compatilizer is ethylene-methyl acrylate grafted glycidyl methacrylate.
Performance testing
(1) Formaldehyde emission: the formaldehyde emission is accurately tested by a formaldehyde tester, and according to the national standard, the formaldehyde emission in the plate is less than 0.2mg/m3The lower the measured formaldehyde emission, the lower the formaldehyde content of the panel.
(2) And (3) hardness testing: adopting the Jansen hardness, pressing a steel ball with the diameter of 11.28 millimeters into the panel by using a pressure gauge, wherein the depth of the steel ball reaches the load required when the steel ball is half of the height, and the higher the Jansen hardness is, the higher the hardness of the panel is.
(3) And (3) testing the waterproofness: the panels prepared in examples 1-3 were sprayed or soaked and the difference in weight of the panels before and after spraying or soaking was recorded, with the smaller the difference in weight, the higher the water resistance rating, the better the water resistance of the panels. The water-proof grade and the corresponding weight difference comparison table are as follows:
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Weight difference | ＜400 | ＜350 | ＜300 | ＜250 | ＜200 | ＜150 | ＜100 | ＜70 | ＜50 |
The performance tests of the environmentally friendly cabinet panels prepared in examples 1-3 are shown in the following table:
| test items | Example 1 | Example 2 | Example 3 |
| Formaldehyde emission (mg/m)3) | 0.002 | 0.006 | 0.005 |
| Hardness (JH) | 1890 | 1680 | 1686 |
| Water resistance rating | 9 | 9 | 9 |
| Impact strength (KJ/m)2) | 32 | 24 | 23 |
| Tensile Strength (MPa) | 56 | 50 | 51 |
The test results show that the formaldehyde content of the cabinet board prepared by the method is not over standard, and the release amount is 0.002-0.006mg/m3The release amount is extremely low, the effect of no formaldehyde release is basically achieved, the environment is protected, no pollution is caused to the environment, and no harm is caused to the health of human bodies. The hardness is between 1680-2And the mechanical property is good.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (6)
1. A preparation process of an environment-friendly cabinet plate is characterized by comprising the following steps: the environment-friendly cabinet plate comprises a decorative layer, a sandwich layer, a foaming plate core layer and a bottom plate layer which are sequentially compounded, wherein resin reinforcing layers are also compounded between the sandwich layer and the foaming plate core layer and between the foaming plate core layer and the bottom plate layer, a plurality of conical bulges are arranged on the side surface of the resin reinforcing layer compounded with the foaming plate core layer, and waterproof flame-retardant coating is sprayed on the surface of the environment-friendly cabinet plate;
the preparation process of the environment-friendly cabinet board comprises the following steps:
coating epoxy resin on the surfaces of the sandwich plate layer and the bottom plate layer;
compounding the side surface of the clamping plate layer coated with the epoxy resin and the side surface of the resin reinforcing layer far away from the conical bulge to prepare a first composite plate, and compounding the side surface of the bottom plate layer coated with the epoxy resin and the side surface of the other resin reinforcing layer far away from the conical bulge to prepare a second composite plate;
the conical protrusion on the surface of the resin reinforcing layer is at least one of silicon nitride, aluminum nitride and silicon dioxide;
placing the foaming board core layer between the first composite board and the second composite board, enabling the foaming board core layer to be attached to the two resin reinforcing layers, and then performing prepressing fixation to obtain a third composite board;
coating epoxy resin on one side surface of the decorative layer, then compounding the side surface of the decorative layer coated with the epoxy resin with the sandwich plate layer of the third composite plate, then prepressing and fixing, and finally forming;
spraying waterproof flame-retardant paint on the surface of the composite board formed in the fourth step, and finally drying to obtain the environment-friendly cabinet board;
wherein the height of the conical bulge on the surface of the resin reinforcing layer is 1-2 mm;
wherein, the pre-pressing fixed pressure in the third step is 40-50MPa, then the temperature is raised to 200-;
the resin reinforcing layer comprises the following raw materials in parts by weight:
40-50 parts of epoxy resin
20-30 parts of high-density polyethylene resin
20-30 parts of polyvinyl chloride resin
5-9 parts of silicon dioxide hollow glass ball
4-9 parts of nano titanium dioxide
5-8 parts of a compatilizer;
the preparation method of the foam board core layer comprises the following steps:
A. weighing 20-30 parts by weight of polyvinyl chloride resin, 10-25 parts by weight of epoxy resin, 65-80 parts by weight of wood powder, 5-10 parts by weight of reinforcing filler, 3-5 parts by weight of toughening modifier, 4-8 parts by weight of lubricant, 2-3 parts by weight of anti-aging agent and 4-8 parts by weight of foaming agent;
B. respectively grinding the raw materials in the step A to prepare powder;
C. mixing the ground raw materials, heating and stirring uniformly, and then cooling to obtain a mixture;
D. and C, putting the mixture prepared in the step C into an extrusion device for high-temperature mixing and melting, extruding the melt into a plate shaping container for foaming and shaping, and preparing the foamed plate core layer.
2. The process for preparing an environmentally friendly cabinet board as claimed in claim 1, wherein: the particle size of the powder particles ground in the step B is 1-200 mu m.
3. The process for preparing an environmentally friendly cabinet board as claimed in claim 1, wherein: and C, in the step C, the temperature is 50-100 ℃ during heating and stirring, and the cooling temperature is 10-20 ℃.
4. The process for preparing an environmentally friendly cabinet board as claimed in claim 1, wherein: and D, controlling the temperature of the plate shaping container in the step D to be 1-10 ℃.
5. The process for preparing an environmentally friendly cabinet board as claimed in claim 1, wherein: the pressure of the pre-pressing and fixing in the fourth step is 25-30MPa, and the temperature is 100-150 ℃ for pressing for 0.5-1 h.
6. The process for preparing an environmentally friendly cabinet board as claimed in claim 1, wherein: and the drying temperature in the fifth step is 85-150 ℃, and the drying time is 1-2 h.
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| CN112026313A (en) * | 2020-09-09 | 2020-12-04 | 安徽易恋家居有限公司 | Flame-retardant and corrosion-resistant cabinet board and preparation method thereof |
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| CN201895441U (en) * | 2010-10-25 | 2011-07-13 | 梁洪兴 | Novel decorative board |
| CN202088613U (en) * | 2011-04-19 | 2011-12-28 | 苏州美克思科技发展有限公司 | Looped fiber fabric phenolic aldehyde foam composite plate |
| CN102492242B (en) * | 2011-12-06 | 2014-03-05 | 山东博拓塑业股份有限公司 | Polyvinyl chloride (PVC) wood-plastic board and preparation method thereof |
| CN203019737U (en) * | 2013-01-05 | 2013-06-26 | 沈阳新永成塑胶有限公司 | Composite and reinforced foaming template of recycled plastics |
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| CN104309245A (en) * | 2014-10-13 | 2015-01-28 | 山东理工大学 | Polyvinyl chloride-based coating co-extrusion wood-plastic cabinet board and manufacturing method thereof |
| CN108164875A (en) * | 2017-12-28 | 2018-06-15 | 六盘水康博木塑科技有限公司 | A kind of high intensity ecological sheet material and preparation method thereof |
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