WO2021135986A1 - Wood-plastic composite material - Google Patents

Wood-plastic composite material Download PDF

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Publication number
WO2021135986A1
WO2021135986A1 PCT/CN2020/137565 CN2020137565W WO2021135986A1 WO 2021135986 A1 WO2021135986 A1 WO 2021135986A1 CN 2020137565 W CN2020137565 W CN 2020137565W WO 2021135986 A1 WO2021135986 A1 WO 2021135986A1
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Prior art keywords
parts
flame retardant
calcium carbonate
wood
middle layer
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PCT/CN2020/137565
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French (fr)
Chinese (zh)
Inventor
叶润露
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安徽科居新材料科技有限公司
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Publication of WO2021135986A1 publication Critical patent/WO2021135986A1/en
Priority to IL289364A priority Critical patent/IL289364A/en

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2497/00—Characterised by the use of lignin-containing materials
    • C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/38—Boron-containing compounds
    • C08K2003/387—Borates

Definitions

  • the invention relates to the technical field of wood-plastic composite materials, in particular to a flame retardant and wood-plastic composite materials.
  • Wood-plastic composite material is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride to replace the usual resin adhesives and mixed with wood flour, rice husk, straw and other waste plant fibers. New wood materials are processed by extrusion, molding, injection molding and other plastic processing techniques to produce plates or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. A board that is formed by hot extrusion after mixing plastic and wood powder in a certain proportion is called an extruded wood-plastic composite board.
  • PVC wood-plastic composite material is the main type of wood-plastic composite material, that is, a composite material formed by melting and blending polyvinyl chloride (PVC) and plant fiber materials. As a recyclable material, it is green and environmentally friendly. It has the excellent characteristics of wood and plastic, and can be prepared by extrusion, pressing, or injection molding.
  • the current wood-plastic composite material itself has outstanding advantages such as waterproof and moisture-proof, anti-corrosion and mothproof, and good comprehensive mechanical properties.
  • the plastic matrix is used to wrap the plant fiber filler, even if no flame retardant is added to the composite material, the flame retardancy of the plastic matrix itself can prevent flame attack and provide sufficient flame retardancy for the material .
  • studies have found that the flame-retardant and durable properties of wood-plastic composite materials are not as good as expected.
  • the plant fibers were not completely wrapped by the plastic matrix. Enclosed will weaken the flame retardant properties of the composite material and affect its final flame retardant grade.
  • the purpose of the present invention is to provide a flame retardant and wood-plastic composite material to solve the problems raised in the background art.
  • a flame retardant in one aspect, includes:
  • the shell component is aluminum hydroxide
  • the composition of the middle layer is hydrated zinc borate
  • the inner core, the composition of the inner core is magnesium hydroxide
  • the particle diameter of the flame retardant is: D50 ⁇ 60nm, D90 ⁇ 100nm;
  • the inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive.
  • the adhesive is a hot melt adhesive.
  • the weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1.
  • the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm.
  • a wood-plastic composite material comprising: PVC resin, wood powder, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricating agent And any of the above-mentioned flame retardants.
  • the wood-plastic composite material includes 80-120 parts by weight of PVC resin, 15-35 parts of wood flour, 15-35 parts of calcium carbonate, 15-35 parts of synergist, and 1-3 parts of foaming agent. Parts, 5-10 parts of stabilizer, 1-2 parts of coupling agent, 6-10 parts of processing aid, 2-4 parts of lubricant, and 8-20 parts of flame retardant.
  • the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood powder, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, and coupling agent. 1.5 parts, 8 parts of processing aids, 3 parts of lubricants and 14 parts of flame retardants.
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of two of calcium-zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the flame retardant of the present invention is flame-retardant in a progressive manner.
  • the aluminum hydroxide begins to endothermic and decompose after 200 degrees Celsius and releases crystal water.
  • the endothermic dehydration process delays the combustion of the polymer.
  • the aluminum hydroxide is equivalent to a heat sink. It slows down the combustion speed, and the water vapor released at the same time not only dilutes the burning gas, but also participates in the reaction of the condensing phase.
  • the endothermic decomposition is based on the large amount of heat absorbed during the decomposition of aluminum hydroxide, and only steam is released during thermal decomposition.
  • magnesium hydroxide decomposes when heated (340-490 degrees) and absorbs the surface heat of the burning material to be flame-retardant; at the same time, it releases a large amount of water to dilute the oxygen on the surface of the burning material, and the decomposed active magnesium oxide adheres to The combustible surface further prevents the combustion from proceeding.
  • Magnesium hydroxide not only does not produce any harmful substances during the entire flame retardant process, but its decomposition products can also absorb a large amount of harmful gases and smoke generated by the combustion of rubber, plastics and other polymers while flame retardant.
  • Active magnesium oxide continuously absorbs The incompletely burned molten residue can quickly stop the combustion while eliminating smoke and preventing droplets. Flame-retardant through continuous gradient progressive method makes the flame-retardant effect more excellent and improves the reliability of flame-retardant.
  • the particle diameter of the flame retardant is controlled to D50 ⁇ 60nm, D90 ⁇ 100nm, the specific surface area of the flame retardant particles is increased, the surface effect is improved, the interface effect is improved, the compatibility of the inorganic substance and the polymer is improved, and the flame retardant is improved. effect.
  • an embodiment of the present invention provides a flame retardant.
  • the flame retardant includes a shell, a middle layer, and an inner core, and adopts a three-layer structure: the shell component is aluminum hydroxide, and the middle layer component is hydrated zinc borate.
  • the core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50 ⁇ 60nm, D90 ⁇ 100nm; the core and the middle layer are connected by an adhesive, and the middle layer is connected to the middle layer.
  • the shell is connected by adhesive.
  • flame retardant is performed in a progressive manner.
  • the aluminum hydroxide begins to endothermic and decompose after 200 degrees Celsius, releasing crystal water.
  • the endothermic dehydration process delays the combustion of the polymer.
  • the aluminum hydroxide is equivalent to a radiator and slows down The burning speed and the water vapor released at the same time not only dilute the burning gas, but also participate in the reaction of the condensing phase.
  • the endothermic decomposition is based on the large amount of heat absorption during the decomposition of aluminum hydroxide, and only emits steam when it is decomposed by heat, and does not produce Toxic, flammable or corrosive gas, aluminum hydroxide, as a flame retardant filler, has the triple functions of filling, flame retardant and smoke suppression, making it a filler that attracts special attention in the material industry.
  • the hydrated zinc borate thermally decomposes at 300 degrees, releasing crystal water, which plays a role in absorbing heat and cooling and diluting oxygen in the air.
  • zinc borate decomposes at high temperature to generate B 2 O 3 , which adheres to the surface of the polymer to form a coating layer, which can inhibit the generation of combustible gas, and can also prevent oxidation reaction and thermal decomposition.
  • magnesium hydroxide decomposes when heated (340-490 degrees) and absorbs the surface heat of the burning material to be flame-retardant; at the same time, it releases a large amount of water to dilute the oxygen on the surface of the burning material, and the decomposed active magnesium oxide adheres to The combustible surface further prevents the combustion from proceeding.
  • Magnesium hydroxide not only does not produce any harmful substances during the entire flame retardant process, but its decomposition products can also absorb a large amount of harmful gases and smoke generated by the combustion of rubber, plastics and other polymers while flame retardant. Active magnesium oxide continuously absorbs The incompletely burned molten residue can quickly stop the combustion while eliminating smoke and preventing droplets. Flame-retardant through continuous gradient progressive method makes the flame-retardant effect more excellent and improves the reliability of flame-retardant.
  • the particle diameter of the flame retardant is controlled to D50 ⁇ 60nm, D90 ⁇ 100nm, the specific surface area of the flame retardant particles is increased, the surface effect is improved, the interface effect is improved, the compatibility of the inorganic substance and the polymer is improved, and the flame retardant is improved. effect.
  • the components of the outer layer can be attached to the surface of the inner layer component layer by layer by spraying, that is, hydrated zinc borate is sprayed and attached to the surface of magnesium hydroxide, and aluminum hydroxide is sprayed and attached. On the surface of hydrated zinc borate.
  • the adhesive is a hot melt adhesive.
  • Hot-melt adhesives are used after being heated to melt the adhesive and are a solid adhesive.
  • General thermoplastic resins can be used, such as polyurethane, polystyrene, polyacrylate, ethylene-vinyl acetate copolymer, etc. While realizing the three-layer flame retardant structure, it will not affect the flame retardant work.
  • the weight ratio of aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1.
  • the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm.
  • embodiments of the present invention also provide a wood-plastic composite material
  • the wood-plastic composite material includes: PVC resin, wood flour, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, Processing aids, lubricants, and any of the flame retardants described above.
  • flame retardant is performed in a progressive manner.
  • Aluminum hydroxide exerts a flame retardant effect at 200 degrees Celsius.
  • hydrated zinc borate thermally decomposes at 300 degrees Celsius to release crystal water to achieve flame retardancy.
  • the magnesium hydroxide can achieve flame retardancy at 340-490 degrees, so that the flame retardant is progressively flame retarded through a continuous gradient, and the flame retardant effect is improved.
  • the particle diameter of the flame retardant is controlled to D50 ⁇ 60nm, D90 ⁇ 100nm, the specific surface area of the flame retardant particles is increased, the surface effect is improved, the interface effect is improved, the compatibility of the inorganic substance and the polymer is improved, and the flame retardant is improved. effect.
  • the wood-plastic composite material includes 80-120 parts by weight of PVC resin, 15-35 parts of wood flour, 15-35 parts of calcium carbonate, 15-35 parts of synergist, and 1 part of foaming agent. -3 parts, 5-10 parts of stabilizer, 1-2 parts of coupling agent, 6-10 parts of processing aid, 2-4 parts of lubricant and 8-20 parts of flame retardant.
  • the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood powder, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, and 1.5 parts of coupling agent, 8 parts of processing aids, 3 parts of lubricants and 14 parts of flame retardants.
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of two of calcium-zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the foaming agent is one or a mixture of azodicarbonamide and calcium bicarbonate;
  • the processing aid is one or a mixture of ACR401 and 530 foaming regulators. All raw materials are mixed into intermediate pellets through a high-mixer, and then extruded through a twin-screw extruder to produce PVC wood-plastic composite products.
  • the preparation method of the wood-plastic composite material of the above embodiment is: spraying the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer , Coupling agent, processing aids, lubricants are mixed and configured into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials is always improved during the mixing process, thereby improving the flame retardant effect ;
  • the mold temperature is 130-200°C
  • the main engine speed is 10-30r/min
  • the feeding speed is 10-25r/min.
  • the wood-plastic composite material includes 80 parts by weight of PVC resin, 35 parts of wood flour, 15 parts of calcium carbonate, 35 parts of synergist, 1 part of foaming agent, 10 parts of stabilizer, 1 part of coupling agent, processing aid 10 parts of agent, 2 parts of lubricant and 20 parts of flame retardant;
  • the outer shell component of the flame retardant is aluminum hydroxide
  • the middle layer component is hydrated zinc borate
  • the core component is magnesium hydroxide
  • the particle diameter of the flame retardant is: D50 ⁇ 60nm, D90 ⁇ 100nm
  • the inner core and the middle layer are connected by an adhesive
  • the middle layer and the outer shell are connected by an adhesive.
  • the weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
  • the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
  • the wood-plastic composite material includes 120 parts by weight of PVC resin, 15 parts of wood flour, 35 parts of calcium carbonate, 15 parts of synergist, 3 parts of foaming agent, 5 parts of stabilizer, 2 parts of coupling agent, processing aid 6 parts of lubricant, 4 parts of lubricant and 8 parts of flame retardant;
  • the outer shell component of the flame retardant is aluminum hydroxide
  • the middle layer component is hydrated zinc borate
  • the core component is magnesium hydroxide
  • the particle diameter of the flame retardant is: D50 ⁇ 60nm, D90 ⁇ 100nm
  • the inner core and the middle layer are connected by an adhesive
  • the middle layer and the outer shell are connected by an adhesive.
  • the weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
  • the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
  • the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, processing aid 8 parts of agent, 3 parts of lubricant and 14 parts of flame retardant;
  • the outer shell component of the flame retardant is aluminum hydroxide
  • the middle layer component is hydrated zinc borate
  • the core component is magnesium hydroxide
  • the particle diameter of the flame retardant is: D50 ⁇ 60nm, D90 ⁇ 100nm
  • the inner core and the middle layer are connected by an adhesive
  • the middle layer and the outer shell are connected by an adhesive.
  • the weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
  • the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
  • the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, processing aid 8 parts of agent, 3 parts of lubricant and 14 parts of flame retardant;
  • the flame retardant is aluminum hydroxide
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
  • the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, processing aid 8 parts of agent, 3 parts of lubricant and 14 parts of flame retardant;
  • the outer shell component of the flame retardant is aluminum hydroxide
  • the middle layer component is hydrated zinc borate
  • the core component is magnesium hydroxide
  • the particle diameter of the flame retardant is: D50 ⁇ 60nm, D90 ⁇ 100nm
  • the inner core and the middle layer are connected by an adhesive
  • the middle layer and the outer shell are connected by an adhesive.
  • the weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
  • the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
  • the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
  • the stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
  • the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
  • the mechanical properties are determined by using the universal testing machine and referring to the national standard GB/T29418-2012 wood-plastic composite product physical and mechanical properties test standard.
  • the flame retardant performance is shown in Table 2;
  • Example 1 211 37.0
  • Example 2 208 36.5
  • Example 3 197 37.5 Comparative example 1 358 33.8 Comparative example 2 395 33.1

Abstract

A wood-plastic composite material comprising a flame retardant. The flame retardant adopts a three-layer structure. The flame retardant comprises an outer shell, a middle layer and an inner core. The component of the outer shell is aluminum hydroxide, the component of the middle layer is hydrated zinc borate, and the component of the inner core is magnesium hydroxide; the particle diameter of the flame retardant is: D50 < 60 nm, D90 < 100 nm; the inner core is connected to the middle layer by means of an adhesive, and the middle layer is connected to the outer shell by means of an adhesive. Flame retardation is performed in a gradient progressive manner. Aluminum hydroxide exerts flame retardant effect at 200℃. When the temperature is still increased, hydrated zinc borate at 300℃ is thermally decomposed, and crystal water is released, thereby achieving flame retardation. When the temperature is further increased, magnesium hydroxide can achieve flame retardation at 340-490℃, such that the flame retardant effect is improved by performing flame retardation in a continuous gradient progressive manner.

Description

[根据细则37.2由ISA制定的发明名称]　木塑复合材料[Name of invention established by ISA according to Rule 37.2] 　WPC 技术领域Technical field
本发明涉及木塑复合材料的技术领域，具体是一种阻燃剂及木塑复合材料。The invention relates to the technical field of wood-plastic composite materials, in particular to a flame retardant and wood-plastic composite materials.
背景技术Background technique
木塑复合材料是国内外近年蓬勃兴起的一类新型复合材料，指利用聚乙烯、聚丙烯和聚氯乙烯等，代替通常的树脂胶粘剂，与木粉、稻壳、秸秆等废植物纤维混合成新的木质材料，再经挤压、模压、注射成型等塑料加工工艺，生产出的板材或型材。主要用于建材、家具、物流包装等行业。将塑料和木质粉料按一定比例混合后经热挤压成型的板材，称之为挤压木塑复合板材。PVC木塑复合材料是木塑复合材料的主要类型，即聚氯乙烯(PVC)与植物纤维材料通过熔融共混加工而形成的一种复合材料，作为一种可循环加工的材料，绿色环保，兼有木材和塑料的优良特性，可以采用挤出、压制、或注射成型的方法制备。Wood-plastic composite material is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride to replace the usual resin adhesives and mixed with wood flour, rice husk, straw and other waste plant fibers. New wood materials are processed by extrusion, molding, injection molding and other plastic processing techniques to produce plates or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. A board that is formed by hot extrusion after mixing plastic and wood powder in a certain proportion is called an extruded wood-plastic composite board. PVC wood-plastic composite material is the main type of wood-plastic composite material, that is, a composite material formed by melting and blending polyvinyl chloride (PVC) and plant fiber materials. As a recyclable material, it is green and environmentally friendly. It has the excellent characteristics of wood and plastic, and can be prepared by extrusion, pressing, or injection molding.
目前的木塑复合材料本身具有防水防潮、防腐防蛀、综合力学性能好等突出的优点。在生产和应用早期，一般认为，利用塑料基体包裹植物纤维填料，即便在复合材料中不添加阻燃剂，塑料基体本身的阻燃性也可以阻止火焰的攻击，为材料提供足够的阻燃性。然而，随着木塑复合材料的应用和发展，经研究发现木塑复合材料的阻燃持久性能并不像预期的那样好，在材料应用的中后期，由于植物纤维未能完全被塑料基体包裹封闭，会弱化复合材料的阻燃性能，影响其最终的阻燃等级。The current wood-plastic composite material itself has outstanding advantages such as waterproof and moisture-proof, anti-corrosion and mothproof, and good comprehensive mechanical properties. In the early stage of production and application, it is generally believed that the plastic matrix is used to wrap the plant fiber filler, even if no flame retardant is added to the composite material, the flame retardancy of the plastic matrix itself can prevent flame attack and provide sufficient flame retardancy for the material . However, with the application and development of wood-plastic composite materials, studies have found that the flame-retardant and durable properties of wood-plastic composite materials are not as good as expected. In the middle and late stages of the material application, the plant fibers were not completely wrapped by the plastic matrix. Enclosed will weaken the flame retardant properties of the composite material and affect its final flame retardant grade.
发明内容Summary of the invention
本发明的目的在于提供一种阻燃剂及木塑复合材料，以解决上述背景技术中提出的问题。The purpose of the present invention is to provide a flame retardant and wood-plastic composite material to solve the problems raised in the background art.
为实现上述目的，本发明提供如下技术方案：In order to achieve the above objectives, the present invention provides the following technical solutions:
一方面，提供一种阻燃剂，所述阻燃剂包括：In one aspect, a flame retardant is provided, and the flame retardant includes:
外壳：所述外壳成分为氢氧化铝；Shell: The shell component is aluminum hydroxide;
中层，所述中层成分为水合硼酸锌；In the middle layer, the composition of the middle layer is hydrated zinc borate;
内核，所述内核成分为氢氧化镁；The inner core, the composition of the inner core is magnesium hydroxide;
且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；And, the particle diameter of the flame retardant is: D50<60nm, D90<100nm;
所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接。The inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive.
优选的，所述粘合剂为热熔型粘合剂。Preferably, the adhesive is a hot melt adhesive.
优选的，所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1。Preferably, the weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1.
优选的，所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm。Preferably, the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm.
另一方面，提供一种木塑复合材料，所述木塑复合材料包括：由PVC树脂、木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂以及上述任一所述的阻燃剂。On the other hand, there is provided a wood-plastic composite material, the wood-plastic composite material comprising: PVC resin, wood powder, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricating agent And any of the above-mentioned flame retardants.
优选的，所述木塑复合材料按照重量份计包括：PVC树脂80-120份、木粉15-35份、碳酸钙15-35份、增效剂15-35份、发泡剂1-3份、稳定剂5-10份、偶联剂1-2份、加工助剂6-10份、润滑剂2-4份以及阻燃剂8-20份。Preferably, the wood-plastic composite material includes 80-120 parts by weight of PVC resin, 15-35 parts of wood flour, 15-35 parts of calcium carbonate, 15-35 parts of synergist, and 1-3 parts of foaming agent. Parts, 5-10 parts of stabilizer, 1-2 parts of coupling agent, 6-10 parts of processing aid, 2-4 parts of lubricant, and 8-20 parts of flame retardant.
优选的，所述木塑复合材料按照重量份计包括：PVC树脂100份、木粉25份、碳酸钙25份、增效剂25份、发泡剂2份、稳定剂7.5份、偶联剂1.5份、加工助剂8份、润滑剂3份以及阻燃剂14份。Preferably, the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood powder, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, and coupling agent. 1.5 parts, 8 parts of processing aids, 3 parts of lubricants and 14 parts of flame retardants.
优选的，所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。Preferably, the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
优选的，所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。Preferably, the stabilizer is one or a mixture of two of calcium-zinc stabilizers and organotin stabilizers.
优选的，所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。Preferably, the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本发明的阻燃剂，通过梯度递进方式进行阻燃，氢氧化铝在200度后开始吸热分解，放出结晶水，吸热脱水过程延缓了聚合物的燃烧，氢氧化铝相当于一个散热器，减缓燃烧速度，同时放出的水蒸气，不仅冲淡燃烧的气体，而且参与冷凝相的反应，吸热分解正是基于氢氧化铝分解时大量吸热，且在受热分解时仅放出蒸汽，而不会产生有毒，可燃或有腐蚀性的气体，故氢氧化铝作为阻燃填充剂，兼有充填、阻燃和消烟三重功能，使之成为材料工业中引起特别关注的填充剂。当温度依然提升时，在300度水合硼酸锌热分解，释放出结晶水，起到吸热冷却作用和稀释空气中氧气的作用。另一方面，在高温下硼酸锌分解生成B 2O 3，附着在聚合物的表面上形成一层覆盖层，此覆盖层可抑制可燃性气体产生，也可阻止氧化反应和热分解作用。当温度依然提升时，氢氧化镁在受热时(340-490度)发生分解吸收燃烧物表面热量到阻燃作用；同时释放出大量水分稀释燃物表面的氧气，分解生成的活性氧化镁附着于可燃物表面又进一步阻止了燃烧的进行。氢氧化镁在整个阻燃过程中不但没有任何有害物质产生，而且其分解的产物在阻燃的同时还能够大量吸收橡胶、塑料等高分子燃烧所产生的有害气体和烟雾，活性氧化镁不断吸收未完全燃烧的熔化残留物，使燃烧很快停止的同时消除烟雾、阻止熔滴。通过连续的梯度递进方式阻燃，使得阻燃效果更加优异，提高阻燃的可靠性。 The flame retardant of the present invention is flame-retardant in a progressive manner. The aluminum hydroxide begins to endothermic and decompose after 200 degrees Celsius and releases crystal water. The endothermic dehydration process delays the combustion of the polymer. The aluminum hydroxide is equivalent to a heat sink. It slows down the combustion speed, and the water vapor released at the same time not only dilutes the burning gas, but also participates in the reaction of the condensing phase. The endothermic decomposition is based on the large amount of heat absorbed during the decomposition of aluminum hydroxide, and only steam is released during thermal decomposition. Will not produce toxic, flammable or corrosive gas, so aluminum hydroxide as a flame-retardant filler, has the triple functions of filling, flame-retardant and smoke suppression, making it a filler that attracts special attention in the material industry. When the temperature is still rising, the hydrated zinc borate thermally decomposes at 300 degrees, releasing crystal water, which plays a role in absorbing heat and cooling and diluting oxygen in the air. On the other hand, zinc borate decomposes at high temperature to generate B 2 O 3 , which adheres to the surface of the polymer to form a coating layer, which can inhibit the generation of combustible gas, and can also prevent oxidation reaction and thermal decomposition. When the temperature is still increasing, magnesium hydroxide decomposes when heated (340-490 degrees) and absorbs the surface heat of the burning material to be flame-retardant; at the same time, it releases a large amount of water to dilute the oxygen on the surface of the burning material, and the decomposed active magnesium oxide adheres to The combustible surface further prevents the combustion from proceeding. Magnesium hydroxide not only does not produce any harmful substances during the entire flame retardant process, but its decomposition products can also absorb a large amount of harmful gases and smoke generated by the combustion of rubber, plastics and other polymers while flame retardant. Active magnesium oxide continuously absorbs The incompletely burned molten residue can quickly stop the combustion while eliminating smoke and preventing droplets. Flame-retardant through continuous gradient progressive method makes the flame-retardant effect more excellent and improves the reliability of flame-retardant.
同时通过控制阻燃剂的颗粒直径为D50<60nm，D90＜100nm，提高阻燃剂颗粒的比表面积，提高表面效应，增强界面作用，改善无机物和聚合物的相容性，提高阻燃的效果。At the same time, by controlling the particle diameter of the flame retardant to D50<60nm, D90<100nm, the specific surface area of the flame retardant particles is increased, the surface effect is improved, the interface effect is improved, the compatibility of the inorganic substance and the polymer is improved, and the flame retardant is improved. effect.
具体实施方式Detailed ways
为了加深对本发明的理解，下面将结合实施例对本发明作进一步详述，以下实施例仅 用于解释本发明，并不构成对本发明保护范围的限定。In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with examples. The following examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
第一方面，本发明实施例提供一种阻燃剂，所述阻燃剂包括外壳、中层、内核，采用三层结构：所述外壳成分为氢氧化铝，所述中层成分为水合硼酸锌，所述内核成分为氢氧化镁；且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接。In the first aspect, an embodiment of the present invention provides a flame retardant. The flame retardant includes a shell, a middle layer, and an inner core, and adopts a three-layer structure: the shell component is aluminum hydroxide, and the middle layer component is hydrated zinc borate. The core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the core and the middle layer are connected by an adhesive, and the middle layer is connected to the middle layer. The shell is connected by adhesive.
本发明实施例通过梯度递进方式进行阻燃，氢氧化铝在200度后开始吸热分解，放出结晶水，吸热脱水过程延缓了聚合物的燃烧，氢氧化铝相当于一个散热器，减缓燃烧速度，同时放出的水蒸气，不仅冲淡燃烧的气体，而且参与冷凝相的反应，吸热分解正是基于氢氧化铝分解时大量吸热，且在受热分解时仅放出蒸汽，而不会产生有毒，可燃或有腐蚀性的气体，故氢氧化铝作为阻燃填充剂，兼有充填、阻燃和消烟三重功能，使之成为材料工业中引起特别关注的填充剂。当温度依然提升时，在300度水合硼酸锌热分解，释放出结晶水，起到吸热冷却作用和稀释空气中氧气的作用。另一方面，在高温下硼酸锌分解生成B 2O 3，附着在聚合物的表面上形成一层覆盖层，此覆盖层可抑制可燃性气体产生，也可阻止氧化反应和热分解作用。当温度依然提升时，氢氧化镁在受热时(340-490度)发生分解吸收燃烧物表面热量到阻燃作用；同时释放出大量水分稀释燃物表面的氧气，分解生成的活性氧化镁附着于可燃物表面又进一步阻止了燃烧的进行。氢氧化镁在整个阻燃过程中不但没有任何有害物质产生，而且其分解的产物在阻燃的同时还能够大量吸收橡胶、塑料等高分子燃烧所产生的有害气体和烟雾，活性氧化镁不断吸收未完全燃烧的熔化残留物，使燃烧很快停止的同时消除烟雾、阻止熔滴。通过连续的梯度递进方式阻燃，使得阻燃效果更加优异，提高阻燃的可靠性。 In the embodiment of the present invention, flame retardant is performed in a progressive manner. The aluminum hydroxide begins to endothermic and decompose after 200 degrees Celsius, releasing crystal water. The endothermic dehydration process delays the combustion of the polymer. The aluminum hydroxide is equivalent to a radiator and slows down The burning speed and the water vapor released at the same time not only dilute the burning gas, but also participate in the reaction of the condensing phase. The endothermic decomposition is based on the large amount of heat absorption during the decomposition of aluminum hydroxide, and only emits steam when it is decomposed by heat, and does not produce Toxic, flammable or corrosive gas, aluminum hydroxide, as a flame retardant filler, has the triple functions of filling, flame retardant and smoke suppression, making it a filler that attracts special attention in the material industry. When the temperature is still rising, the hydrated zinc borate thermally decomposes at 300 degrees, releasing crystal water, which plays a role in absorbing heat and cooling and diluting oxygen in the air. On the other hand, zinc borate decomposes at high temperature to generate B 2 O 3 , which adheres to the surface of the polymer to form a coating layer, which can inhibit the generation of combustible gas, and can also prevent oxidation reaction and thermal decomposition. When the temperature is still increasing, magnesium hydroxide decomposes when heated (340-490 degrees) and absorbs the surface heat of the burning material to be flame-retardant; at the same time, it releases a large amount of water to dilute the oxygen on the surface of the burning material, and the decomposed active magnesium oxide adheres to The combustible surface further prevents the combustion from proceeding. Magnesium hydroxide not only does not produce any harmful substances during the entire flame retardant process, but its decomposition products can also absorb a large amount of harmful gases and smoke generated by the combustion of rubber, plastics and other polymers while flame retardant. Active magnesium oxide continuously absorbs The incompletely burned molten residue can quickly stop the combustion while eliminating smoke and preventing droplets. Flame-retardant through continuous gradient progressive method makes the flame-retardant effect more excellent and improves the reliability of flame-retardant.
同时通过控制阻燃剂的颗粒直径为D50<60nm，D90＜100nm，提高阻燃剂颗粒的比表面积，提高表面效应，增强界面作用，改善无机物和聚合物的相容性，提高阻燃的效果。At the same time, by controlling the particle diameter of the flame retardant to D50<60nm, D90<100nm, the specific surface area of the flame retardant particles is increased, the surface effect is improved, the interface effect is improved, the compatibility of the inorganic substance and the polymer is improved, and the flame retardant is improved. effect.
上述实施例在制备过程中可以通过喷撒的方式将外层的成分逐层的附着在内层成分的表面，即水合硼酸锌喷撒附着在氢氧化镁的表面，进一步将氢氧化铝喷洒附着在水合硼酸锌的表面。During the preparation process of the above embodiment, the components of the outer layer can be attached to the surface of the inner layer component layer by layer by spraying, that is, hydrated zinc borate is sprayed and attached to the surface of magnesium hydroxide, and aluminum hydroxide is sprayed and attached. On the surface of hydrated zinc borate.
一实施例中，所述粘合剂为热熔型粘合剂。热熔型粘合剂通过加热使粘合剂熔化后使用，是一种固体粘合剂。一般热塑性树脂均可使用，如聚氨酯、聚苯乙烯、聚丙烯酸酯、乙烯—醋酸乙烯共聚物等。在实现三层阻燃剂结构的同时，不会影响阻燃工作的进行。In one embodiment, the adhesive is a hot melt adhesive. Hot-melt adhesives are used after being heated to melt the adhesive and are a solid adhesive. General thermoplastic resins can be used, such as polyurethane, polystyrene, polyacrylate, ethylene-vinyl acetate copolymer, etc. While realizing the three-layer flame retardant structure, it will not affect the flame retardant work.
一实施例中，所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1。通过控制上述三层的比例，实现最优的阻燃效果的同时，确保木塑复合材料的物化性能。In an embodiment, the weight ratio of aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1. By controlling the ratio of the above three layers, the optimal flame retardant effect is achieved while ensuring the physical and chemical properties of the wood-plastic composite material.
一实施例中，所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm。通过控制氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径，确保阻燃剂颗粒的比表面积。In one embodiment, the particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm. By controlling the particle diameters of aluminum hydroxide, hydrated zinc borate and magnesium hydroxide, the specific surface area of the flame retardant particles is ensured.
第二方面，本发明实施例还提供一种木塑复合材料，所述木塑复合材料包括：由PVC树脂、木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂以及上述任一所述的阻燃剂。In the second aspect, embodiments of the present invention also provide a wood-plastic composite material, the wood-plastic composite material includes: PVC resin, wood flour, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, Processing aids, lubricants, and any of the flame retardants described above.
本发明实施例通过梯度递进方式进行阻燃，氢氧化铝在200度发挥阻燃效果，当温度依然提升时，在300度水合硼酸锌热分解，释放出结晶水，实现阻燃。当温度再进一步提高时，氢氧化镁在能够在340-490度实现阻燃，从而通过连续的梯度递进阻燃，提高阻燃的效果。In the embodiment of the present invention, flame retardant is performed in a progressive manner. Aluminum hydroxide exerts a flame retardant effect at 200 degrees Celsius. When the temperature is still increased, hydrated zinc borate thermally decomposes at 300 degrees Celsius to release crystal water to achieve flame retardancy. When the temperature is further increased, the magnesium hydroxide can achieve flame retardancy at 340-490 degrees, so that the flame retardant is progressively flame retarded through a continuous gradient, and the flame retardant effect is improved.
同时通过控制阻燃剂的颗粒直径为D50<60nm，D90＜100nm，提高阻燃剂颗粒的比表面积，提高表面效应，增强界面作用，改善无机物和聚合物的相容性，提高阻燃的效果。At the same time, by controlling the particle diameter of the flame retardant to D50<60nm, D90<100nm, the specific surface area of the flame retardant particles is increased, the surface effect is improved, the interface effect is improved, the compatibility of the inorganic substance and the polymer is improved, and the flame retardant is improved. effect.
一实施例中，所述木塑复合材料按照重量份计包括：PVC树脂80-120份、木粉15-35份、碳酸钙15-35份、增效剂15-35份、发泡剂1-3份、稳定剂5-10份、偶联剂1-2份、加工助剂6-10份、润滑剂2-4份以及阻燃剂8-20份。In one embodiment, the wood-plastic composite material includes 80-120 parts by weight of PVC resin, 15-35 parts of wood flour, 15-35 parts of calcium carbonate, 15-35 parts of synergist, and 1 part of foaming agent. -3 parts, 5-10 parts of stabilizer, 1-2 parts of coupling agent, 6-10 parts of processing aid, 2-4 parts of lubricant and 8-20 parts of flame retardant.
一实施例中，所述木塑复合材料按照重量份计包括：PVC树脂100份、木粉25份、碳酸钙25份、增效剂25份、发泡剂2份、稳定剂7.5份、偶联剂1.5份、加工助剂8份、润滑剂3份以及阻燃剂14份。In one embodiment, the wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood powder, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, and 1.5 parts of coupling agent, 8 parts of processing aids, 3 parts of lubricants and 14 parts of flame retardants.
一实施例中，所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。In one embodiment, the calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
一实施例中，所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。In an embodiment, the stabilizer is one or a mixture of two of calcium-zinc stabilizers and organotin stabilizers.
一实施例中，所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。In one embodiment, the lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
上述实施例中，发泡剂为偶氮二甲酰胺和碳酸氢钙中的一种或两种的混合物；加工助剂为ACR401、530发泡调节剂中的一种或两种的混合物。通过高混机将所有原料配混制成中介性粒料，然后再通过双螺杆挤出机挤出加工成PVC木塑复合材料制品。In the above embodiments, the foaming agent is one or a mixture of azodicarbonamide and calcium bicarbonate; the processing aid is one or a mixture of ACR401 and 530 foaming regulators. All raw materials are mixed into intermediate pellets through a high-mixer, and then extruded through a twin-screw extruder to produce PVC wood-plastic composite products.
上述实施例的木塑复合材料的制备方法为：将所述阻燃剂喷洒至木粉的表面；PVC树脂、喷洒阻燃剂的木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；通过喷洒的方式，能够将阻燃剂均匀的与木粉接触，在混合过程总提高物料的混合，进而提高阻燃的效果；The preparation method of the wood-plastic composite material of the above embodiment is: spraying the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer , Coupling agent, processing aids, lubricants are mixed and configured into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials is always improved during the mixing process, thereby improving the flame retardant effect ；
通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，Add the intermediate pellets into the extruder and heat to 130～190℃ for extrusion; the extruder barrel temperature is 130～180℃,
模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。The mold temperature is 130-200℃, the main engine speed is 10-30r/min, and the feeding speed is 10-25r/min.
下面通过具体的实施例进行详细的说明：A detailed description will be given below through specific embodiments:
实施例1：Example 1:
木塑复合材料按照重量份计包括：PVC树脂80份、木粉35份、碳酸钙15份、增效剂35份、发泡剂1份、稳定剂10份、偶联剂1份、加工助剂10份、润滑剂2份以及阻燃剂20份；The wood-plastic composite material includes 80 parts by weight of PVC resin, 35 parts of wood flour, 15 parts of calcium carbonate, 35 parts of synergist, 1 part of foaming agent, 10 parts of stabilizer, 1 part of coupling agent, processing aid 10 parts of agent, 2 parts of lubricant and 20 parts of flame retardant;
其中，所述阻燃剂所述外壳成分为氢氧化铝，所述中层成分为水合硼酸锌，所述内核成分为氢氧化镁；且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接。Wherein, the outer shell component of the flame retardant is aluminum hydroxide, the middle layer component is hydrated zinc borate, and the core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive.
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1；The weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm；The particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。The calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。The stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。The lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
将所述阻燃剂喷洒至木粉的表面；PVC树脂、喷洒阻燃剂的木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；通过喷洒的方式，能够将阻燃剂均匀的与木粉接触，在混合过程中提高物料的混合，进而提高阻燃的效果；Spray the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。Add intermediate pellets into the extruder and heat to 130～190℃ for extrusion; extruder barrel temperature is 130～180℃, die temperature is 130～200℃, main engine speed is 10～30r/min, feeding speed It is 10～25r/min.
实施例2：Example 2:
木塑复合材料按照重量份计包括：PVC树脂120份、木粉15份、碳酸钙35份、增效剂15份、发泡剂3份、稳定剂5份、偶联剂2份、加工助剂6份、润滑剂4份以及阻燃剂8份；The wood-plastic composite material includes 120 parts by weight of PVC resin, 15 parts of wood flour, 35 parts of calcium carbonate, 15 parts of synergist, 3 parts of foaming agent, 5 parts of stabilizer, 2 parts of coupling agent, processing aid 6 parts of lubricant, 4 parts of lubricant and 8 parts of flame retardant;
其中，所述阻燃剂所述外壳成分为氢氧化铝，所述中层成分为水合硼酸锌，所述内核成分为氢氧化镁；且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接。Wherein, the outer shell component of the flame retardant is aluminum hydroxide, the middle layer component is hydrated zinc borate, and the core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive.
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1；The weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm；The particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。The calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。The stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。The lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
将所述阻燃剂喷洒至木粉的表面；PVC树脂、喷洒阻燃剂的木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；通过喷洒的方式，能够将阻燃剂均匀的与木粉接触，在混合过程中提高物料的混合，进而提高阻燃的效果；Spray the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。Add intermediate pellets to the extruder and heat to 130～190℃ for extrusion; extruder barrel temperature is 130～180℃, die temperature is 130～200℃, main engine speed is 10～30r/min, feeding speed It is 10～25r/min.
实施例3Example 3
木塑复合材料按照重量份计包括：PVC树脂100份、木粉25份、碳酸钙25份、增效剂25份、发泡剂2份、稳定剂7.5份、偶联剂1.5份、加工助剂8份、润滑剂3份以及阻燃剂14份；The wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, processing aid 8 parts of agent, 3 parts of lubricant and 14 parts of flame retardant;
其中，所述阻燃剂所述外壳成分为氢氧化铝，所述中层成分为水合硼酸锌，所述内核成分为氢氧化镁；且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接。Wherein, the outer shell component of the flame retardant is aluminum hydroxide, the middle layer component is hydrated zinc borate, and the core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive.
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1；The weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm；The particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。The calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。The stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。The lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
将所述阻燃剂喷洒至木粉的表面；PVC树脂、喷洒阻燃剂的木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；通过喷洒的方式，能够将阻燃剂均匀的与木粉接触，在混合过程中提高物料的混合，进而提高阻燃的效果；Spray the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。Add intermediate pellets into the extruder and heat to 130～190℃ for extrusion; extruder barrel temperature is 130～180℃, die temperature is 130～200℃, main engine speed is 10～30r/min, feeding speed It is 10～25r/min.
对比例1Comparative example 1
木塑复合材料按照重量份计包括：PVC树脂100份、木粉25份、碳酸钙25份、增效剂25份、发泡剂2份、稳定剂7.5份、偶联剂1.5份、加工助剂8份、润滑剂3份以及阻燃剂14份；The wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, processing aid 8 parts of agent, 3 parts of lubricant and 14 parts of flame retardant;
其中，所述阻燃剂为氢氧化铝；Wherein, the flame retardant is aluminum hydroxide;
所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。The calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。The stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。The lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
将所述阻燃剂喷洒至木粉的表面；PVC树脂、喷洒阻燃剂的木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；通过喷洒的方式，能够将阻燃剂均匀的与木粉接触，在混合过程中提高物料的混合，进而提高阻燃的效果；Spray the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets; by spraying, the flame retardant can be uniformly contacted with wood powder, and the mixing of materials can be improved during the mixing process, thereby improving the flame retardant effect;
通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。Add intermediate pellets to the extruder and heat to 130～190℃ for extrusion; extruder barrel temperature is 130～180℃, die temperature is 130～200℃, main engine speed is 10～30r/min, feeding speed It is 10～25r/min.
对比例2Comparative example 2
木塑复合材料按照重量份计包括：PVC树脂100份、木粉25份、碳酸钙25份、增效剂25份、发泡剂2份、稳定剂7.5份、偶联剂1.5份、加工助剂8份、润滑剂3份以及阻燃剂14份；The wood-plastic composite material includes 100 parts by weight of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, processing aid 8 parts of agent, 3 parts of lubricant and 14 parts of flame retardant;
其中，所述阻燃剂所述外壳成分为氢氧化铝，所述中层成分为水合硼酸锌，所述内核成分为氢氧化镁；且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接。Wherein, the outer shell component of the flame retardant is aluminum hydroxide, the middle layer component is hydrated zinc borate, and the core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive.
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1；The weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm；The particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物。The calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate.
所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物。The stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers.
所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物。The lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate.
将PVC树脂、阻燃剂、木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；Mix PVC resin, flame retardant, wood powder, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant to form intermediate pellets;
通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。Add intermediate pellets into the extruder and heat to 130～190℃ for extrusion; extruder barrel temperature is 130～180℃, die temperature is 130～200℃, main engine speed is 10～30r/min, feeding speed It is 10～25r/min.
表1：各实施例产品的力学性能指标Table 1: Mechanical performance indexes of the products of various examples
 To 抗弯强度(MPa)Flexural strength (MPa) 冲击强度(MPa)Impact strength (MPa)
实施例1Example 1 26.1726.17 4.794.79
实施例2Example 2 26.5626.56 4.884.88
实施例3Example 3 28.7628.76 5.015.01
对比例1Comparative example 1 19.7119.71 3.873.87
对比例2Comparative example 2 19.4519.45 4.014.01
上表，采用万能力学实验机、参考国标GB/T29418-2012木塑复合材料产品物理力学性能测试标准测定力学性能。In the above table, the mechanical properties are determined by using the universal testing machine and referring to the national standard GB/T29418-2012 wood-plastic composite product physical and mechanical properties test standard.
表2：各实施例产品的阻燃指标Table 2: Flame Retardant Indexes of Products in Each Example
阻燃性能如表2所示；The flame retardant performance is shown in Table 2;
 To 热释放速率(KW/m 2) Heat release rate (KW/m 2 ) 氧指数Oxygen Index
实施例1Example 1 211211 37.037.0
实施例2Example 2 208208 36.536.5
实施例3Example 3 197197 37.537.5
对比例1Comparative example 1 358358 33.833.8
对比例2Comparative example 2 395395 33.133.1
综上所述，能够知晓，实施例3制备的产品在力学性能和阻燃性的实验结果均优于其他实施例，并且实施例1～3的力学性能和抗菌性的实验结果总体优于对比例1和2。In summary, it can be known that the experimental results of mechanical properties and flame retardancy of the product prepared in Example 3 are better than those of other examples, and the experimental results of mechanical properties and antibacterial properties of Examples 1 to 3 are generally better than those of the Ratio 1 and 2.
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是本发明的原理，在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明的范围内。本发明要求的保护范围由所附的权利要求书及其等同物界定。The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the specification describe only the principles of the present invention, and the present invention may have various forms without departing from the spirit and scope of the present invention. Changes and improvements, these changes and improvements fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims (1)

  1. 一种木塑复合材料，其特征在于，所述木塑复合材料包括：A wood-plastic composite material, characterized in that the wood-plastic composite material comprises:
    PVC树脂100份、木粉25份、碳酸钙25份、增效剂25份、发泡剂2份、稳定剂7.5份、偶联剂1.5份、加工助剂8份、润滑剂3份以及阻燃剂14份；100 parts of PVC resin, 25 parts of wood flour, 25 parts of calcium carbonate, 25 parts of synergist, 2 parts of foaming agent, 7.5 parts of stabilizer, 1.5 parts of coupling agent, 8 parts of processing aids, 3 parts of lubricants and resistance 14 parts of fuel;
    其中，所述阻燃剂所述外壳成分为氢氧化铝，所述中层成分为水合硼酸锌，所述内核成分为氢氧化镁；且，所述阻燃剂的颗粒直径为：D50<60nm，D90＜100nm；所述内核与所述中层之间采用粘合剂连接，所述中层与所述外壳采用粘合剂连接；Wherein, the shell component of the flame retardant is aluminum hydroxide, the middle layer component is hydrated zinc borate, and the core component is magnesium hydroxide; and the particle diameter of the flame retardant is: D50<60nm, D90<100nm; the inner core and the middle layer are connected by an adhesive, and the middle layer and the outer shell are connected by an adhesive;
    所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的重量份比为3∶2∶1；The weight ratio of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide is 3:2:1;
    所述氢氧化铝、水合硼酸锌酸盐和氢氧化镁的颗粒直径均小于20nm；The particle diameters of the aluminum hydroxide, hydrated zinc borate and magnesium hydroxide are all less than 20 nm;
    所述碳酸钙为重质碳酸钙、轻质碳酸钙、复合碳酸钙中的一种或多种的混合物；The calcium carbonate is a mixture of one or more of heavy calcium carbonate, light calcium carbonate, and composite calcium carbonate;
    所述稳定剂为钙锌稳定剂、有机锡稳定剂中的一种或两种的混合物；The stabilizer is one or a mixture of calcium and zinc stabilizers and organotin stabilizers;
    所述润滑剂为石蜡，PE蜡，硬脂酸，硬脂酸钙中的一种或多种的混合物；The lubricant is a mixture of one or more of paraffin wax, PE wax, stearic acid, and calcium stearate;
    将所述阻燃剂喷洒至木粉的表面；PVC树脂、喷洒阻燃剂的木粉、碳酸钙、增效剂、发泡剂、稳定剂、偶联剂、加工助剂、润滑剂混合配置成中介粒料；Spray the flame retardant on the surface of wood powder; PVC resin, wood powder sprayed with flame retardant, calcium carbonate, synergist, foaming agent, stabilizer, coupling agent, processing aid, lubricant mixed configuration Into intermediate pellets;
    通过双螺杆挤出机挤出成型；Extrusion molding through twin screw extruder;
    将中介粒料加入挤出机并加热至130～190℃挤出；挤出机机筒温度为130～180℃，模具温度为130～200℃，主机转速为10～30r/min，喂料转速为10～25r/min。Add intermediate pellets to the extruder and heat to 130～190℃ for extrusion; extruder barrel temperature is 130～180℃, die temperature is 130～200℃, main engine speed is 10～30r/min, feeding speed It is 10～25r/min.
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