CN110938253A - High-strength wood-plastic composite fireproof door plate and manufacturing method thereof - Google Patents
High-strength wood-plastic composite fireproof door plate and manufacturing method thereof Download PDFInfo
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
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- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
Abstract
The invention provides a high-strength wood-plastic composite fireproof door plate and a manufacturing method thereof, and relates to the field of furniture and building materials, wherein the high-strength wood-plastic composite fireproof door plate is prepared from the following components, by weight, 60-80 parts of eucalyptus powder, 30-40 parts of ultrahigh molecular weight polyethylene, 100 parts of linear low density polyethylene, 10-20 parts of an ethylene-vinyl acetate copolymer, 500 parts of α -methacrylic acid solution 400, 1-6 parts of maleic anhydride grafted polypropylene, 8-15 parts of vinyl ester resin glass flake daub, 10-20 parts of barium titanate, 10-20 parts of aluminum oxide, 5-10 parts of modified diatomite, 5-10 parts of basalt fiber, 1-5 parts of microcrystalline paraffin, 10-20 parts of methyl dimethyl phosphonate intercalated expandable graphite, 0.5-1 part of an MDB-NS wood-plastic special stabilizer, 0.5-1 part of white oil and 0.5-1 part of a weather-resistant modifier.
Description
Technical Field
The invention relates to the field of furniture building materials, in particular to a high-strength wood-plastic composite fireproof door plate and a manufacturing method thereof.
Background
The fireproof door is a door which can meet the requirements of fire-resistant stability, integrity and heat insulation within a certain time, and is also a fireproof partition which is arranged in a fireproof partition room, an evacuation staircase, a vertical shaft and the like and has certain fire resistance.
The wood-plastic composite material is a novel composite material which is briskly developed in recent years at home and abroad, and is composite material particles prepared by mixing polyvinyl chloride with plant fibers such as wood powder, rice hulls, bamboo powder and the like to form a novel wood material, and mixing and granulating the novel wood material. The wood-plastic composite material is based on high-density polyethylene and wood fiber, and determines that the wood-plastic composite material has certain characteristics of plastics and wood, (1) the wood-plastic composite material contains plastics and fibers, so that the wood-plastic composite material has the processing performance similar to that of wood, can be sawed, nailed and planed, can be finished by using a woodworking tool, and has nail-holding force obviously superior to that of other synthetic materials. The mechanical property is better than that of wood material. The nail-holding power is generally 3 times of that of wood and 5 times of that of shaving boards; (2) the wood-plastic composite material has good strength performance and better elastic modulus because the wood-plastic composite material contains plastics. In addition, the fiber is contained and is fully mixed with the plastic, so the wood composite material has physical and mechanical properties of compression resistance, bending resistance and the like which are equivalent to those of hardwood, and the durability of the wood composite material is obviously superior to that of common wood materials. The surface hardness is high, and is generally 2-5 times of that of wood; (3) compared with wood, the wood floor board has the advantages of water resistance, corrosion resistance and long service life, can resist strong acid and alkali, is water-resistant and corrosion-resistant, does not propagate bacteria, and is not easy to be damaged by worms or grow fungi. The service life is long and can reach more than 50 years; (4) the wood plastic composite material has excellent adjustability, and can change polymerization, foaming, curing, modification and the like through the aid, so that the characteristics of density, strength and the like of the wood plastic composite material are changed, and special requirements of ageing resistance, static resistance, flame retardance and the like can be met; (5) the ultraviolet light stability and the colorability are good; (6) its advantages are high effect on changing waste into useful one and 100% recovery. Can be decomposed without causing white pollution, and is a real green and environment-friendly product; (7) the raw materials are wide in source, the plastic raw materials for producing the wood-plastic composite material are mainly high-density polyethylene or polypropylene, the wood fiber can be wood powder, bran coat or wood fiber, and in addition, a small amount of additives and other processing aids are needed; (8) the wood-plastic composite material can be made into any shape and size according to needs, products of the wood-plastic composite material can be made into the wood-plastic fireproof door by adding corresponding fillers and additives in the market at present, but the structural strength and the flame retardant property of the wood-plastic composite material are poor, and the use requirements cannot be met.
Chinese patent CN106977844 discloses an environment-friendly flame-retardant PVC wood-plastic composite material and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin; 20-50 parts of modified wood powder; 1-25 parts of functional raw materials; 5-10 parts of calcium carbonate; 2-10 parts of a stabilizer; 1-5 parts of zinc stearate; 1-5 parts of a composite foaming agent; 0.5-2 parts of antioxidant; 0.5-2 parts of polyethylene wax, wherein the prepared wood-plastic composite material has high internal porosity, functional substances are uniformly distributed in a system, and the wood-plastic composite material is not coated by resin, so that the wood-plastic composite material has better performance of adsorbing toxic volatile matters, the formaldehyde adsorption capacity can reach 1137 mu g/g, and the ammonia adsorption capacity can reach 405.08 mg/g; the material has good flame retardant property due to the isolation effect of the functional substances, the limited oxygen index can reach 38.66, the flame retardant effect is good, the mechanical property of the material is good, and the requirements of the mechanical property and the fire-proof grade of the interior decoration material are met.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-strength wood-plastic composite fireproof door plate and a manufacturing method thereof.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 60-80 parts of eucalyptus powder, 30-40 parts of ultrahigh molecular weight polyethylene, 100-120 parts of linear low density polyethylene, 10-20 parts of ethylene-vinyl acetate copolymer, 500 parts of α -methacrylic acid solution 400, 1-6 parts of maleic anhydride grafted polypropylene, 8-15 parts of vinyl ester resin glass flake daub, 10-20 parts of barium titanate, 10-20 parts of aluminum oxide, 5-10 parts of modified diatomite, 5-10 parts of basalt fiber, 1-5 parts of microcrystalline paraffin, 10-20 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.5-1 part of special stabilizer for MDB-wood-plastic NS, 0.5-1 part of white oil and 0.5-1 part of weather-resistant modifier.
Preferably, the modified polyethylene composition is prepared from 65 parts by weight of eucalyptus powder, 40 parts by weight of ultrahigh molecular weight polyethylene, 110 parts by weight of linear low density polyethylene, 16 parts by weight of ethylene-vinyl acetate copolymer, 500 parts by weight of α -methacrylic acid solution, 5 parts by weight of maleic anhydride grafted polypropylene, 12 parts by weight of vinyl ester resin glass flake daub, 18 parts by weight of barium titanate, 10 parts by weight of alumina, 6 parts by weight of modified diatomite, 10 parts by weight of basalt fiber, 2 parts by weight of microcrystalline paraffin, 12 parts by weight of dimethyl methylphosphonate intercalated expandable graphite, 0.5-1 part by weight of MDB-NS wood plastic special stabilizer, 0.8 part by weight of white oil and 1 part by weight of weather-resistant modifier.
Preferably, the modified diatomite wood plastic composite material is prepared from, by weight, 60 parts of eucalyptus powder, 40 parts of ultrahigh molecular weight polyethylene, 120 parts of linear low density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 420 parts of α -methacrylic acid solution, 5 parts of maleic anhydride grafted polypropylene, 12 parts of vinyl ester resin glass flake daub, 20 parts of barium titanate, 18 parts of aluminum oxide, 6 parts of modified diatomite, 8 parts of basalt fiber, 2 parts of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.5-1 part of MDB-NS wood plastic special stabilizer, 0.8 part of white oil and 0.8 part of weather-resistant modifier.
Preferably, the preparation method of the modified diatomite comprises the following steps:
roasting the diatomite in a muffle furnace at 480 ℃ and 500 ℃ for 2-4h, cooling the furnace to room temperature, adding the cooled diatomite into a sulfuric acid solution, soaking in a water bath at 60-70 ℃ for 5-10h, performing suction filtration, washing with water to neutrality, drying in an oven, adding the diatomite into absolute ethyl alcohol, performing ultrasonic oscillation dispersion for 20-30min, adding a coupling agent and stearic acid, stirring in a water bath at 45-50 ℃ for 10-12h, evaporating the ethyl alcohol, and grinding to obtain the modified diatomite.
Preferably, the mass concentration of the sulfuric acid solution is 60-70%.
Preferably, the coupling agent is any one of a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH570, a silane coupling agent KH792, a silane coupling agent DL602 and a silane coupling agent DL 171.
Preferably, the dimethyl methylphosphonate intercalated expandable graphite is prepared by the following method:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 10-15min at 40-50 ℃, cooling to room temperature, adding expandable graphite, reacting for 6-10h at room temperature, performing suction filtration, washing to neutrality, and drying at 50-70 ℃.
Preferably, the weather-resistant modifier is any one of glycidyl acrylate, glycidyl methacrylate and ethylene-glycidyl methacrylate copolymer.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding into α -methacrylic acid solution, heating to 80-85 ℃ under mechanical stirring, treating for 2-5h, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 60-70 ℃, stirring for 30-50min, transferring to a double-screw extruder for melt blending, extruding, cooling and crushing into particles, adding the particles into a die, performing compression molding, maintaining the pressure for a period of time, taking out after solidification is stable, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Preferably, the temperature during the compression molding is 180-200 ℃, the pressure is 5-8MPa, and the pressure is maintained for 5-8 min.
(III) advantageous effects
The invention provides a high-strength wood-plastic composite fireproof door plate and a manufacturing method thereof, and the high-strength wood-plastic composite fireproof door plate has the following beneficial effects:
eucalyptus powder and linear low-density polyethylene are main materials of the wood-plastic composite fireproof door panel, the linear low-density polyethylene is widely applied as a wood-plastic raw material, and has the advantages of low cost and easiness in processing, but the mechanical strength is low, and the high-temperature resistance is poor, the ultra-high molecular weight polyethylene and the ethylene-vinyl acetate copolymer are added to modify the wood-plastic composite fireproof door panel, the molecular chain of the ultra-high molecular weight polyethylene is long, the heated molecular chain is easy to open and can be aggregated with the linear low-density polyethylene and the ethylene-vinyl acetate copolymer to generate a cross-linked network, so that the toughness, the strength and the heating stability of the door panel are improved, barium titanate, aluminum oxide and modified diatomite are added as fillers, the impact strength of the fireproof door panel can be enhanced, the barium titanate, the aluminum oxide and the modified diatomite are also used as flame retardant components to reduce the ignition point, and, the basalt fiber has a smooth surface and a low surface energy, filler particles can be adsorbed on the surface of the basalt fiber, the surface roughness of the fiber is improved, the effective contact area with the wood-plastic material is increased, the skeleton supporting effect is achieved, dimethyl methylphosphonate intercalated expandable graphite can be instantly and rapidly decomposed when meeting high temperature, dimethyl methylphosphonate is released, noncombustible gas is decomposed, the continuation of combustion is prevented, the flame retardant effect is achieved, the addition amount is small, the structural strength is improved to a certain extent, and the high-strength wood-plastic composite fireproof door panel is small in density, excellent in mechanical property, good in fireproof and flame retardant performance and capable of meeting the use requirements.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the high-strength wood-plastic composite fireproof door plate is prepared from the following components, by weight, 68 parts of eucalyptus powder, 35 parts of ultrahigh molecular weight polyethylene, 110 parts of linear low-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 460 parts of α -methacrylic acid solution, 2 parts of maleic anhydride grafted polypropylene, 10 parts of vinyl ester resin glass flake daub, 16 parts of barium titanate, 10 parts of aluminum oxide, 7 parts of modified diatomite, 10 parts of basalt fiber, 3 parts of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.8 part of MDB-NS wood-plastic special stabilizer, 0.5 part of white oil and 0.5 part of weather-resistant modifier ethylene-glycidyl methacrylate copolymer.
The preparation method of the modified diatomite comprises the following steps:
roasting diatomite in a muffle furnace at 480 ℃ for 2.5h, cooling the furnace to room temperature, adding the roasted diatomite into a sulfuric acid solution with the mass concentration of 68%, soaking in a water bath at 60 ℃ for 8h, filtering, washing with water to be neutral, drying in an oven, adding the dried diatomite into absolute ethyl alcohol, dispersing for 30min by ultrasonic oscillation, adding a silane coupling agent KH550 and stearic acid, stirring in a water bath at 48 ℃ for 12h, evaporating the ethyl alcohol, and grinding to obtain the modified diatomite.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 15min at 45 ℃, cooling to room temperature, adding expandable graphite, reacting for 8h at room temperature, performing suction filtration, washing to neutrality, and drying at 60 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 82 ℃ under mechanical stirring, treating for 4 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 70 ℃, stirring for 40min, transferring into a double-screw extruder, carrying out melt blending, extruding, cooling and crushing into particles, adding the particles into a die, carrying out compression molding at 185 ℃, carrying out 6MPa, maintaining the pressure for 8min, taking out after solidification and stabilization, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 2:
the high-strength wood-plastic composite fireproof door plate is prepared from 65 parts by weight of eucalyptus powder, 40 parts by weight of ultrahigh molecular weight polyethylene, 110 parts by weight of linear low density polyethylene, 16 parts by weight of ethylene-vinyl acetate copolymer, 500 parts by weight of α -methacrylic acid solution, 5 parts by weight of maleic anhydride grafted polypropylene, 12 parts by weight of vinyl ester resin glass flake daub, 18 parts by weight of barium titanate, 10 parts by weight of aluminum oxide, 6 parts by weight of modified diatomite, 10 parts by weight of basalt fiber, 2 parts by weight of microcrystalline paraffin, 12 parts by weight of dimethyl methylphosphonate intercalated expandable graphite, 0.5 part by weight of MDB-NS wood-plastic special stabilizer, 0.8 part by weight of white oil and 1 part by weight of glycidyl acrylate.
The preparation method of the modified diatomite comprises the following steps:
roasting diatomite in a muffle furnace at 490 ℃ for 2h, cooling the furnace to room temperature, adding the cooled diatomite into a 60% sulfuric acid solution, soaking in a 65 ℃ water bath for 6h, performing suction filtration, washing with water to neutrality, drying in an oven, adding the diatomite into absolute ethyl alcohol, performing ultrasonic oscillation dispersion for 25min, adding a silane coupling agent DL602 and stearic acid, stirring in a 50 ℃ water bath for 12h, evaporating the ethanol, and grinding to obtain the modified diatomite.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 15min at 40 ℃, cooling to room temperature, adding expandable graphite, reacting for 8h at room temperature, performing suction filtration, washing to neutrality, and drying at 55 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 80 ℃ under mechanical stirring, treating for 4 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 70 ℃, stirring for 35min, transferring into a double-screw extruder, carrying out melt blending, extruding, cooling and crushing into particles, adding the particles into a die, carrying out compression molding at 200 ℃, 7MPa, maintaining the pressure for 6min, taking out after solidification and stabilization, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 3:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 60 parts of eucalyptus powder, 40 parts of ultrahigh molecular weight polyethylene, 120 parts of linear low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 420 parts of α -methacrylic acid solution, 5 parts of maleic anhydride grafted polypropylene, 12 parts of vinyl ester resin glass flake daub, 20 parts of barium titanate, 18 parts of aluminum oxide, 6 parts of modified diatomite, 8 parts of basalt fiber, 2 parts of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.8 part of MDB-NS wood-plastic special stabilizer, 0.8 part of white oil and 0.8 part of glycidyl methacrylate.
The preparation method of the modified diatomite comprises the following steps:
roasting kieselguhr in a muffle furnace at 500 ℃ for 3h, cooling the furnace to room temperature, adding the kieselguhr into a sulfuric acid solution with the mass concentration of 70%, soaking in a water bath at 60 ℃ for 7h, performing suction filtration, washing with water to neutrality, drying in an oven, adding the kieselguhr into absolute ethyl alcohol, performing ultrasonic oscillation dispersion for 30min, adding a silane coupling agent KH560 and stearic acid, stirring in a water bath at 50 ℃ for 12h, evaporating the ethyl alcohol, and grinding to obtain the modified kieselguhr.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring at 50 ℃ for 12min, cooling to room temperature, adding expandable graphite, reacting at room temperature for 8h, performing suction filtration, washing to neutrality, and drying at 70 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate is characterized by comprising the following steps of:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 85 ℃ under mechanical stirring, treating for 4 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 70 ℃, stirring for 40min, transferring into a double-screw extruder, carrying out melt blending, extruding, cooling and crushing into particles, adding the particles into a die, carrying out compression molding at 180 ℃, carrying out pressure maintaining for 6min, taking out after solidification and stabilization, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 4:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 60 parts of eucalyptus powder, 30 parts of ultrahigh molecular weight polyethylene, 100 parts of linear low-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 400 parts of α -methacrylic acid solution, 1 part of maleic anhydride grafted polypropylene, 8 parts of vinyl ester resin glass flake daub, 10 parts of barium titanate, 10 parts of aluminum oxide, 5 parts of modified diatomite, 5 parts of basalt fiber, 1 part of microcrystalline paraffin, 10 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.5 part of MDB-NS wood-plastic special stabilizer, 0.5 part of white oil and 0.5 part of weather-resistant modifier glycidyl acrylate.
The preparation method of the modified diatomite comprises the following steps:
roasting diatomite in a muffle furnace at 480 ℃ for 2h, cooling the furnace to room temperature, adding the roasted diatomite into a sulfuric acid solution with the mass concentration of 60%, soaking the diatomite in a 60 ℃ water bath for 5h, carrying out suction filtration, washing the diatomite to be neutral, drying the diatomite in an oven, adding the diatomite into absolute ethyl alcohol, carrying out ultrasonic oscillation dispersion for 20min, adding a silane coupling agent DL171 and stearic acid, stirring the diatomite in a 45 ℃ water bath for 10h, evaporating the ethyl alcohol to dryness, and grinding the mixture to obtain the modified diatomite.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 10min at 40 ℃, cooling to room temperature, adding expandable graphite, reacting for 6h at room temperature, performing suction filtration, washing to neutrality, and drying at 50 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 80 ℃ under mechanical stirring, treating for 2 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 60 ℃, stirring for 30min, transferring into a double-screw extruder, carrying out melt blending, extruding, cooling and crushing into particles, adding the particles into a die, carrying out compression molding at 180 ℃, 5MPa and maintaining for 5min, taking out after solidification and stabilization, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 5:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 80 parts of eucalyptus powder, 40 parts of ultrahigh molecular weight polyethylene, 120 parts of linear low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 500 parts of α -methacrylic acid solution, 6 parts of maleic anhydride grafted polypropylene, 15 parts of vinyl ester resin glass flake daub, 20 parts of barium titanate, 20 parts of aluminum oxide, 10 parts of modified diatomite, 10 parts of basalt fiber, 5 parts of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 1 part of MDB-NS wood-plastic special stabilizer, 1 part of white oil and 0.5-1 part of weather-resistant modifier glycidyl acrylate.
The preparation method of the modified diatomite comprises the following steps:
placing diatomite into a muffle furnace, roasting for 4h at 500 ℃, cooling the furnace to room temperature, adding the cooled diatomite into a sulfuric acid solution with the mass concentration of 70%, soaking in a 70 ℃ water bath for 10h, performing suction filtration, washing to be neutral, drying in an oven, adding the diatomite into absolute ethyl alcohol, performing ultrasonic oscillation dispersion for 30min, adding a silane coupling agent KH550 and stearic acid, stirring in a 50 ℃ water bath for 12h, evaporating the ethyl alcohol, and grinding to obtain the modified diatomite.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 15min at 50 ℃, cooling to room temperature, adding expandable graphite, reacting for 10h at room temperature, performing suction filtration, washing to neutrality, and drying at 70 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 85 ℃ under mechanical stirring, treating for 5 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 70 ℃, stirring for 50min, transferring into a double-screw extruder, carrying out melt blending, extruding, cooling and crushing into particles, adding the particles into a die, carrying out compression molding at 200 ℃, 8MPa and maintaining for 8min, taking out after solidification and stabilization, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 6:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 75 parts of eucalyptus powder, 40 parts of ultrahigh molecular weight polyethylene, 120 parts of linear low-density polyethylene, 18 parts of ethylene-vinyl acetate copolymer, 480 parts of α -methacrylic acid solution, 2 parts of maleic anhydride grafted polypropylene, 12 parts of vinyl ester resin glass flake daub, 20 parts of barium titanate, 10 parts of aluminum oxide, 6 parts of modified diatomite, 10 parts of basalt fiber, 2 parts of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 1 part of MDB-NS wood-plastic special stabilizer, 0.8 part of white oil and 0.8 part of weather-resistant modifier glycidyl methacrylate.
The preparation method of the modified diatomite comprises the following steps:
roasting kieselguhr in a muffle furnace at 480 ℃ for 3h, cooling the furnace to room temperature, adding the cooled kieselguhr into a sulfuric acid solution with the mass concentration of 70%, soaking in a 70 ℃ water bath for 6h, performing suction filtration, washing with water to neutrality, drying in an oven, adding the kieselguhr into absolute ethyl alcohol, performing ultrasonic oscillation dispersion for 30min, adding a silane coupling agent DL171 and stearic acid, stirring in a 48 ℃ water bath for 11h, evaporating the ethyl alcohol, and grinding to obtain the modified kieselguhr.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring at 50 ℃ for 12min, cooling to room temperature, adding expandable graphite, reacting at room temperature for 10h, performing suction filtration, washing to neutrality, and drying at 58 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 85 ℃ under mechanical stirring, treating for 4 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 68 ℃, stirring for 50min, transferring into a double-screw extruder, carrying out melt blending, extruding, cooling and crushing into particles, adding the particles into a die, carrying out compression molding at 180 ℃, carrying out pressure maintaining for 5min, taking out after solidification and stabilization, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 7:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 60 parts of eucalyptus powder, 40 parts of ultrahigh molecular weight polyethylene, 100 parts of linear low-density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 400 parts of α -methacrylic acid solution, 6 parts of maleic anhydride grafted polypropylene, 8 parts of vinyl ester resin glass flake daub, 20 parts of barium titanate, 10 parts of aluminum oxide, 10 parts of modified diatomite, 5 parts of basalt fiber, 5 parts of microcrystalline paraffin, 10 parts of dimethyl methylphosphonate intercalated expandable graphite, 1 part of MDB-NS wood-plastic special stabilizer, 0.5 part of white oil and 1 part of weather-resistant modifier ethylene-glycidyl methacrylate copolymer.
The preparation method of the modified diatomite comprises the following steps:
roasting diatomite in a muffle furnace at 480 ℃ for 4h, cooling the furnace to room temperature, adding the roasted diatomite into a sulfuric acid solution with the mass concentration of 60%, soaking the diatomite in a 70 ℃ water bath for 5h, carrying out suction filtration, washing the diatomite to be neutral, drying the diatomite in an oven, adding the diatomite into absolute ethyl alcohol, carrying out ultrasonic oscillation dispersion for 30min, adding a silane coupling agent KH792 and stearic acid, stirring the diatomite in a 45 ℃ water bath for 12h, evaporating the ethyl alcohol to dryness, and grinding the mixture to obtain the modified diatomite.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 15min at 40 ℃, cooling to room temperature, adding expandable graphite, reacting for 6h at room temperature, performing suction filtration, washing to neutrality, and drying at 70 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 80 ℃ under mechanical stirring, treating for 5 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 60 ℃, stirring for 50min, transferring into a double-screw extruder for melt blending, extruding, cooling and crushing into particles, adding the particles into a die, performing compression molding at 180 ℃, 8MPa, maintaining the pressure for 5min, taking out after the particles are cured and stabilized, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
Example 8:
the high-strength wood-plastic composite fireproof door plate is prepared from, by weight, 80 parts of eucalyptus powder, 30 parts of ultrahigh molecular weight polyethylene, 120 parts of linear low-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 500 parts of α -methacrylic acid solution, 1 part of maleic anhydride grafted polypropylene, 15 parts of vinyl ester resin glass flake daub, 10 parts of barium titanate, 20 parts of aluminum oxide, 5 parts of modified diatomite, 10 parts of basalt fiber, 1 part of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.5 part of MDB-NS wood-plastic special stabilizer, 1 part of white oil and 0.5 part of weather-resistant modifier ethylene-glycidyl methacrylate copolymer.
The preparation method of the modified diatomite comprises the following steps:
roasting diatomite in a muffle furnace at 480 ℃ for 4h, cooling the furnace to room temperature, adding the roasted diatomite into a sulfuric acid solution with the mass concentration of 60%, soaking the diatomite in a 70 ℃ water bath for 5h, carrying out suction filtration, washing the diatomite to be neutral, drying the diatomite in an oven, adding the diatomite into absolute ethyl alcohol, carrying out ultrasonic oscillation dispersion for 30min, adding a silane coupling agent DL602 and stearic acid, stirring the diatomite in a 45 ℃ water bath for 12h, evaporating the ethyl alcohol, and grinding the mixture to obtain the modified diatomite.
The preparation method of the dimethyl methylphosphonate intercalated expandable graphite comprises the following steps:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 15min at 40 ℃, cooling to room temperature, adding expandable graphite, reacting for 6h at room temperature, performing suction filtration, washing to neutrality, and drying at 70 ℃.
The manufacturing method of the high-strength wood-plastic composite fireproof door plate comprises the following steps:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding the mixture into α -methacrylic acid solution, heating to 80 ℃ under mechanical stirring, treating for 5 hours, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 60 ℃, stirring for 50min, transferring into a double-screw extruder for melt blending, extruding, cooling and crushing into particles, adding the particles into a die, performing compression molding at 180 ℃, 8MPa, maintaining the pressure for 5min, taking out after the particles are cured and stabilized, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
The following table 1 shows the main performance parameters of the high-strength wood-plastic composite fireproof door panel manufactured in the embodiments 1 to 3 of the present invention:
table 1:
as shown in the table 1, the high-strength wood-plastic composite fireproof door plate disclosed by the invention is small in density, excellent in mechanical property, good in fireproof and flame-retardant properties and capable of meeting the use requirements.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The high-strength wood-plastic composite fireproof door plate is characterized by being prepared from the following components, by weight, 60-80 parts of eucalyptus powder, 30-40 parts of ultrahigh molecular weight polyethylene, 100 parts of linear low density polyethylene, 120 parts of ethylene-vinyl acetate copolymer, 10-20 parts of α -methacrylic acid solution, 500 parts of maleic anhydride grafted polypropylene, 8-15 parts of vinyl ester resin glass flake daub, 10-20 parts of barium titanate, 10-20 parts of aluminum oxide, 5-10 parts of modified diatomite, 5-10 parts of basalt fiber, 1-5 parts of microcrystalline paraffin, 10-20 parts of methyl dimethyl phosphonate intercalated expandable graphite, 0.5-1 part of special stabilizer for MDB-NS wood-plastic, 0.5-1 part of white oil and 0.5-1 part of weather-resistant modifier.
2. The high-strength wood-plastic composite fireproof door panel according to claim 1, wherein the high-strength wood-plastic composite fireproof door panel is prepared from 65 parts by weight of eucalyptus powder, 40 parts by weight of ultrahigh molecular weight polyethylene, 110 parts by weight of linear low density polyethylene, 16 parts by weight of ethylene-vinyl acetate copolymer, 500 parts by weight of α -methacrylic acid solution, 5 parts by weight of maleic anhydride grafted polypropylene, 12 parts by weight of vinyl ester resin glass flake daub, 18 parts by weight of barium titanate, 10 parts by weight of aluminum oxide, 6 parts by weight of modified diatomite, 10 parts by weight of basalt fiber, 2 parts by weight of microcrystalline paraffin, 12 parts by weight of dimethyl methylphosphonate intercalated expandable graphite, 0.5 part by weight of special MDB-NS wood-plastic stabilizer, 0.8 part by weight of white oil and 1 part by weight of weather-resistant modifier.
3. The high-strength wood-plastic composite fireproof door plate as claimed in claim 1, which is prepared from the following components, by weight, 60 parts of eucalyptus powder, 40 parts of ultra-high molecular weight polyethylene, 120 parts of linear low density polyethylene, 20 parts of ethylene-vinyl acetate copolymer, 420 parts of α -methacrylic acid solution, 5 parts of maleic anhydride grafted polypropylene, 12 parts of vinyl ester resin glass flake daub, 20 parts of barium titanate, 18 parts of aluminum oxide, 6 parts of modified diatomite, 8 parts of basalt fiber, 2 parts of microcrystalline paraffin, 20 parts of dimethyl methylphosphonate intercalated expandable graphite, 0.8 part of special stabilizer for MDB-NS wood-plastic, 0.8 part of white oil and 0.8 part of weather-resistant modifier.
4. The high-strength wood-plastic composite fireproof door panel according to claim 1, wherein the modified diatomite is prepared by the following method:
roasting the diatomite in a muffle furnace at 480 ℃ and 500 ℃ for 2-4h, cooling the furnace to room temperature, adding the cooled diatomite into a sulfuric acid solution, soaking in a water bath at 60-70 ℃ for 5-10h, performing suction filtration, washing with water to neutrality, drying in an oven, adding the diatomite into absolute ethyl alcohol, performing ultrasonic oscillation dispersion for 20-30min, adding a coupling agent and stearic acid, stirring in a water bath at 45-50 ℃ for 10-12h, evaporating the ethyl alcohol, and grinding to obtain the modified diatomite.
5. The high-strength wood-plastic composite fireproof door panel according to claim 4, wherein the mass concentration of the sulfuric acid solution is 60-70%.
6. The high-strength wood-plastic composite fire door panel according to claim 4, wherein the coupling agent is any one of a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH570, a silane coupling agent KH792, a silane coupling agent DL602, and a silane coupling agent DL 171.
7. The high strength wood-plastic composite fire door panel according to claim 1, wherein the dimethyl methylphosphonate intercalated expandable graphite is prepared by the following method:
adding dimethyl methylphosphonate and potassium permanganate into a phosphoric acid solution, mechanically stirring for 10-15min at 40-50 ℃, cooling to room temperature, adding expandable graphite, reacting for 6-10h at room temperature, performing suction filtration, washing to neutrality, and drying at 50-70 ℃.
8. The high strength wood-plastic composite fire door panel according to claim 1, wherein the weather resistant modifier is any one of glycidyl acrylate, glycidyl methacrylate, and ethylene-glycidyl methacrylate copolymer.
9. A method of making a high strength wood plastic composite fire door panel according to any of claims 1 to 9, comprising the steps of:
(1) blending ultrahigh molecular weight polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymer, adding into α -methacrylic acid solution, heating to 80-85 ℃ under mechanical stirring, treating for 2-5h, leaching with acetone, and drying to obtain a mixture;
(2) adding the mixture, eucalyptus powder, maleic anhydride grafted polypropylene, vinyl ester resin glass flake daub, barium titanate, alumina, modified diatomite, basalt fiber, microcrystalline paraffin, dimethyl methylphosphonate intercalated expandable graphite, an MDB-NS wood plastic special stabilizer, white oil and a weather-resistant modifier into a high-speed mixer, heating to 60-70 ℃, stirring for 30-50min, transferring to a double-screw extruder for melt blending, extruding, cooling and crushing into particles, adding the particles into a die, performing compression molding, maintaining the pressure for a period of time, taking out after solidification is stable, and maintaining to obtain the high-strength wood plastic composite fireproof door panel.
10. The method for manufacturing a high-strength wood-plastic composite fireproof door plank according to claim 9, wherein the temperature during the compression molding is 180-.
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