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CN106977844B - A kind of environment-friendly, flame-retardant PVC wood-plastic composite material and preparation method thereof - Google Patents

A kind of environment-friendly, flame-retardant PVC wood-plastic composite material and preparation method thereof Download PDF

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CN106977844B
CN106977844B CN201710232970.8A CN201710232970A CN106977844B CN 106977844 B CN106977844 B CN 106977844B CN 201710232970 A CN201710232970 A CN 201710232970A CN 106977844 B CN106977844 B CN 106977844B
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plastic composite
wood
composite material
flame
retardant pvc
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CN106977844A (en
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李凯夫
林溪顺
董先明
董倩倩
周武艺
周桥芳
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South China Agricultural University
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions 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; Compositions of derivatives of such polymers
    • C08L27/02—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions 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; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—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
    • 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
    • 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
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Building Environments (AREA)

Abstract

The present invention discloses a kind of environmental protection, fire-retardant PVC wood plastic composite material and preparation method thereof.The composite material is made using the raw material of following portions by weight: 100 parts of Corvic；20~50 parts of modified wood powder；1~25 part of function raw material；5~10 parts of calcium carbonate；2~10 parts of stabilizer；1~5 part of zinc stearate；1~5 part of composite foamable agent；0.5~2 part of antioxidant；0.5~2 part of polyethylene wax.Wood plastic composite interior porosity prepared by the present invention is high, and functional mass is evenly distributed in system, is not had by resin cladding and preferably adsorbs toxic volatile matter performance, formaldehyde absorbing amount can reach 1137 μ g/g, and ammonia gas absorption amount can reach 405.08mg/g；Functional mass isolation effect makes material have preferable flame retardant property, and limit oxygen index can be up to 38.66, good flame retardation effect, and material mechanical performance is good, reaches the mechanical property and fire-protection rating requirement of house decorative material.

Description

A kind of environmental protection, fire-retardant PVC wood plastic composite material and preparation method thereof
Technical field
The present invention relates to a kind of environmental protection, fire-retardant PVC wood plastic composite material, more particularly to a kind of environmental protection, fire-retardant PVC Wood plastic composite and preparation method thereof.
Background technique
Wood plastic composite integrates the advantages of timber and plastics, not only has appearance as natural timber, but also Have many advantages, such as that anti-corrosion, moisture-proof, Anti-moth-eating, dimensional stability are high, do not crack, warpage, hardness is not higher than pure plastics, can be carried out two Secondary or multiple processing re-uses, and the processing advantage with similar wood, the features such as can be cut, be bonded, thus conduct A kind of real green product has become the optimal selection of generation modeling Dai Mu.Wood plastic composite can be widely applied to logistics packaging, The fields such as gardens, building, house ornamentation, furniture, especially the application development of ornament materials is rapid indoors.Indoor living environment is people A problem paying much attention to, and Conventional plate-type furniture and house decorative material can all discharge a certain amount of formaldehyde etc. poison gas Body has certain influence to the health of people, therefore, discharges if developing one kind entirely without volatile organic matter, and can inhale With malicious volatile organic matter, and the wood plastic composite with good flame-retardance energy, there will be good market application prospect.
The wood plastic composite with the toxic volatiles organics function such as formaldehyde adsorption is studied at present, it is main by adding Add adsorbent (such as active carbon) that wood plastic composite is made to show certain environment purification ability.For example, Publication No. The patent of invention of CN102229729B discloses a kind of wood plastic composite and preparation method thereof of adsorbable poison gas, utilizes wood Powder and igelite are raw material, are equipped with related auxiliaries, and active carbon is added after handling wood powder with silane coupling agent, passes through melting It squeezes out and wood plastic composite is made, but the invention does not adsorb the ability of poison gas to it and tests and assesses.
Halogen-free flame retardants is focused primarily upon to the flame retardant property research of wood plastic composite.For example, Publication No. The patent of invention of CN104497607A discloses a kind of halogen-free flame-retardant wood-plastic composite material and preparation method thereof, utilizes polyphosphoric acid The compound of salt, hypophosphites and other fire retardants hinders polyethylene, polypropylene base wood-plastic composite material as fire retardant Combustion processing, limit oxygen index (LOI) is 30 or more, but the mass percent of fire retardant, 15%~40%, additive amount is larger.
Summary of the invention
In order to overcome the disadvantages and deficiencies of the prior art, the primary purpose of the present invention is that providing a kind of environmentally friendly, fire-retardant PVC wood plastic composite material.The toxic gases such as the adsorbable formaldehyde of the PVC wood plastic composite material have good flame-retardance energy and mechanics Performance.
Another object of the present invention is to provide above-mentioned environmental protection, the preparation method of fire-retardant PVC wood plastic composite material.
The purpose of the invention is achieved by the following technical solution:
A kind of environmentally friendly, fire-retardant PVC wood plastic composite material is made using the raw material of following portions by weight:
Preferably, environmentally friendly, the fire-retardant PVC wood plastic composite material is made using the raw material of following portions by weight:
It is furthermore preferred that environmentally friendly, the fire-retardant PVC wood plastic composite material, is the raw material system using following portions by weight :
The Corvic is SG-5 type powder-type polyvinyl chloride；
The modified wood powder is that one or more of pine powder, Poplar Powder, fir powder mixture connect through maleic anhydride The PE modified product of branch；The molecular weight of the maleic anhydride grafted polyethylene is 10000~200000, grafting rate 2%~ 4%；The moisture content 3%~10% of the modified wood powder, 80~120 mesh of partial size；
The function raw material is one or both of diatomite, active carbon, at for example two kinds, according to diatomite and work Property charcoal mass ratio be 1:2~2:1 mix；The partial size of the function raw material is 80~200 mesh；
The calcium carbonate is single precipitated calcium carbonate, density 2.3g/cm3~2.9g/cm3；
The stabilizer is at least one of calcium zinc stabilizer, barium zinc stabilizer；
The composite foamable agent is that azodicarbonamide and zinc stearate are answered according to what 1:2~2:1 ratio mixed Foaming agent is closed, blowing temperature is 180 DEG C~190 DEG C；
The antioxidant be single phenol antioxidant, thio lipid antioxidant, in composite antioxidant at least It is a kind of；
The molecular weight of the polyethylene wax is 1400~8000；
A kind of preparation method of environmentally friendly, fire-retardant PVC wood plastic composite material, comprising the following steps:
(1) Corvic and stabilizer are taken, is added in high-speed mixer and mixes, temperature is 85 DEG C~95 DEG C, mixing 8min~10min, not discharging；
(2) modified wood powder, composite foamable agent, function raw material, calcium carbonate, polyethylene are successively put into high-speed mixer again Wax, zinc stearate and antioxidant mix 8min~10min, and mixing temperature is 85 DEG C~95 DEG C, and discharging is cooling, obtain environmental protection, Fire-retardant PVC wood plastic composite material；
Further include following steps to preferably achieve the object of the present invention:
(3) the mixed material of step (2) is blended through double screw extruder melting extrusion, by pelletizing after cooling by water, Pellet is after air dry oven drying to moisture content is lower than 3%, pack；
(4) dried granules obtained by step (3) are put into horizontal injection press, through being molded acquisition standard batten.
The preparation method of the modified wood powder, includes the following steps:
By 11:1~9:1 mass ratio weigh wood powder (one or more of pine powder, Poplar Powder, fir powder mixture) and Maleic anhydride grafted polyethylene, mixing, is warming up to 85 DEG C~95 DEG C, mixing 10min~15min obtains modified wood powder.
The preparation method of the composite foamable agent, includes the following steps:
Azodicarbonamide and zinc stearate are weighed by 1:2~2:1 mass ratio, it will in the case where temperature is 70 DEG C~90 DEG C environment The two mixing composition composite foamable agent.
The present invention compared with the existing technology, have following advantages and effects
Wood plastic composite interior porosity prepared by the present invention is high, and functional mass is evenly distributed in system, is not set Rouge cladding, which has, preferably adsorbs toxic volatile matter performance, and formaldehyde absorbing amount can reach 1137 μ g/g, and ammonia gas absorption amount can reach 405.08mg/g；Functional mass isolation effect makes material have preferable flame retardant property, and limit oxygen index can be up to 38.66, fire-retardant effect Fruit is good, and material mechanical performance is good, reaches the mechanical property and fire-protection rating requirement of house decorative material.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
The present invention mainly realizes present inventive concept using the above scheme, but is not limited only to above scheme, all to use The scheme of central scope of the invention belongs among the range that the present invention is protected.
Embodiment 1
(1) proportion is stocked up according to parts by weight:
(2) azodicarbonamide and zinc stearate for weighing equal parts by weight are mixed in the case where temperature is 80 DEG C of environment to be obtained Obtain composite foamable agent；
(3) weigh pine powder by weight: high-speed mixer is added in the ratio quality that maleic anhydride grafted polyethylene is 10:1 Middle mixing is warming up to 85 DEG C, and mixing 10min~15min, discharging obtains modified wood powder；
(4) 100 parts of Corvics, 4 parts of calcium zinc stabilizers are weighed by weight, are added in high-speed mixer and are mixed, temperature Degree is 85 DEG C, mixes 8min~10min, not discharging；
(5) again successively into high-speed mixer put into 40 parts of modified wood powders, 5 parts of diatomite, 10 parts of calcium carbonate, 2 parts it is compound Foaming agent, 2 parts of polyethylene waxes, 2 parts of zinc stearates and 2 parts of 2,6-di-tert-butyl p-cresol antioxidants, temperature are 85 DEG C, mixing 8min~10min, discharging are cooling；
(6) the mixed material of step (5) is blended through double screw extruder melting extrusion, wherein the five of double screw extruder Duan Wendu is 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 160 DEG C, and revolving speed is 20~30r/min；Pass through pelletizing after cooling by water, grain Material packs after air dry oven drying to moisture content is lower than 3%；
(7) dried granules obtained by step (6) are put into horizontal injection press, through being molded acquisition standard batten；Wherein it is molded Three sections of temperature of machine are 190 DEG C, 185 DEG C, 185 DEG C.
The mechanical property and flame retardant property of PVC wood plastic composite material manufactured in the present embodiment distinguish reference standard ASTM D7031-11 and GBT 2406.2-2009 is tested, and testing result is shown in Table 1, and formaldehyde adsorption property is shown in Table 2；Ammonia gas absorption 3 can be shown in Table.
Embodiment 2
For the present embodiment difference from example 1 is that the mass fraction of diatomite is 25 parts, the PVC wood plastic of preparation is multiple The mechanical property and flame retardant property testing result of condensation material are shown in Table 1, and formaldehyde adsorption property is shown in Table 2；Ammonia gas absorption performance is shown in Table 3.
Embodiment 3
The present embodiment is difference from example 1 is that function raw material is the active carbon (quality of diatomite in embodiment 1 Number is 5 parts), the mechanical property and flame retardant property testing result of the PVC wood plastic composite material of preparation are shown in Table 1, formaldehyde absorbing 2 can be shown in Table；Ammonia gas absorption performance is shown in Table 3.
Embodiment 4
The present embodiment and embodiment 2 are the difference is that function raw material is the active carbon (quality of diatomite in embodiment 2 Number is 25 parts), the mechanical property and flame retardant property testing result of the PVC wood plastic composite material of preparation are shown in Table 1, formaldehyde absorbing 2 can be shown in Table；Ammonia gas absorption performance is shown in Table 3.
Embodiment 5
The present embodiment is difference from example 1 is that function raw material is the mixture (ratio of active carbon and diatomite 1:1) (mass fraction of diatomite is 5 parts in embodiment 1), the mechanical property and anti-flammability of the PVC wood plastic composite material of preparation Energy testing result is shown in Table 1, and formaldehyde adsorption property is shown in Table 2；Ammonia gas absorption performance is shown in Table 3.
Embodiment 6
The present embodiment and embodiment 2 are the difference is that function raw material is the mixture (ratio of active carbon and diatomite 1:1) (mass fraction of diatomite is 25 parts in embodiment 2), the mechanical property and anti-flammability of the PVC wood plastic composite material of preparation Energy testing result is shown in Table 1, and formaldehyde adsorption property is shown in Table 2；Ammonia gas absorption performance is shown in Table 3.
Comparative example
For this comparative example difference from example 1 is that function material quality number is 0 part, the PVC wood plastic of preparation is multiple The mechanical property and flame retardant property testing result of condensation material are shown in Table 1, and formaldehyde adsorption property is shown in Table 2；Ammonia gas absorption performance is shown in Table 3.
Mechanical property, the limit oxygen index testing result of 1 PVC wood plastic composite material of table
Comparative example Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Bending strength (MPa) 82.34 83.17 80.66 83.09 75.47 83.15
Composite bending modulus (MPa) 4404.16 4195.15 4084.06 4714.93 4346.08 4546.65
Impact strength (KJ/m2) 16.86 19.48 16.05 19.75 17.81 19.35
Tensile strength (MPa) 46.95 47.31 43.51 47.96 44.55 47.48
Limit oxygen index 32.36 34.41 38.66 33.16 37.46 33.69
Note: reference standard ASTM D7031-11, GBT 2406.2-2009
2 PVC wood plastic composite material formaldehyde adsorption property testing result (35 DEG C, 60h) of table
Comparative example Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Adsorbance (μ g/g) 607.88 723.98 1137.6 646.66 1235.6 697.91
3 PVC wood plastic composite material ammonia gas absorption performance test results (30 DEG C, 60h) of table
Comparative example Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6
Adsorbance (mg/g) 257.85 295.53 405.08 278.45 398.08 288.56
Testing result shows:
(1) PVC wood plastic composite material mechanical property and flame retardant property prepared by the present invention are good, and wherein bending strength reaches 80.66~83.17MPa, composite bending modulus reach 4084.06~4714.93MPa；Notch impact strength reaches 16.05~ 19.75KJ/m2；Tensile strength reaches 43.51~47.96MPa；Limit oxygen index reaches 33~38, meets house decorative material Defined fire-protection rating.
(2) PVC wood plastic composite material prepared by the present invention is due to foam structure, so having certain formaldehyde adsorption Ability, and the material for adding diatomite shows good formaldehyde absorbing ability, formaldehyde absorbing amount can reach 1235.6 μ g/ The adsorbance of g, ammonia can reach 405.08mg/g.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention, It should be equivalent substitute mode, be included within the scope of the present invention.

Claims (9)

1.一种环保、阻燃的PVC木塑复合材料，其特征在于是采用下述重量份数的原料制得：1. An environment-friendly, flame-retardant PVC wood-plastic composite material is characterized in that it is made from the following raw materials in parts by weight: 所述的改性木粉为松木粉、杨木粉、杉木粉中的一种或几种混合物经马来酸酐接枝聚乙烯改性产物；所述马来酸酐接枝聚乙烯的分子量为10000～200000，接枝率2％～4％；所述的改性木粉的含水率3％～10％，粒径80～120目；The modified wood powder is a product of one or more mixtures of pine wood powder, poplar wood powder and fir wood powder modified by maleic anhydride grafted polyethylene; the molecular weight of the maleic anhydride grafted polyethylene is 10000 ~200000, the grafting rate is 2%~4%; the moisture content of the modified wood flour is 3%~10%, and the particle size is 80~120 mesh; 所述的功能原料为硅藻土、活性炭中的一种或两种；The functional raw material is one or both of diatomite and activated carbon; 所述的复合发泡剂为偶氮二甲酰胺与硬脂酸锌按照1：2～2：1比例混合而成的复合发泡剂。The composite foaming agent is a composite foaming agent obtained by mixing azodicarbonamide and zinc stearate in a ratio of 1:2 to 2:1. 2.根据权利要求1所述的环保、阻燃的PVC木塑复合材料，其特征在于：是采用下述重量份数的原料制得：2. The environmentally friendly, flame-retardant PVC wood-plastic composite material according to claim 1, characterized in that: it is made from the following raw materials in parts by weight: 3.根据权利要求1所述的环保、阻燃的PVC木塑复合材料，其特征在于：是采用下述重量份数的原料制得：3. The environmentally friendly, flame-retardant PVC wood-plastic composite material according to claim 1, characterized in that: it is made from the following raw materials in parts by weight: 4.根据权利要求1～3任一项所述的环保、阻燃的PVC木塑复合材料，其特征在于：4. The environmentally friendly and flame-retardant PVC wood-plastic composite material according to any one of claims 1 to 3, characterized in that: 所述的功能原料为按照硅藻土与活性炭质量比为1：2～2：1混合而成；所述的功能原料的粒径为80～200目。The functional raw material is mixed according to the mass ratio of diatomite and activated carbon of 1:2-2:1; the particle size of the functional raw material is 80-200 mesh. 5.根据权利要求1～3任一项所述的环保、阻燃的PVC木塑复合材料，其特征在于：5. The environmentally friendly and flame-retardant PVC wood-plastic composite material according to any one of claims 1 to 3, characterized in that: 所述的聚氯乙烯树脂为SG-5型粉末型聚氯乙烯；Described polyvinyl chloride resin is SG-5 type powder type polyvinyl chloride; 所述的碳酸钙为单轻质碳酸钙，密度为2.3g/cm3～2.9g/cm3；The calcium carbonate described is single light calcium carbonate with a density of 2.3g/cm 3 to 2.9g/cm 3 ; 所述的稳定剂为钙锌稳定剂、钡锌稳定剂中的至少一种。The stabilizer is at least one of a calcium-zinc stabilizer and a barium-zinc stabilizer. 6.根据权利要求1～3任一项所述的环保、阻燃的PVC木塑复合材料，其特征在于：6. The environmentally friendly and flame-retardant PVC wood-plastic composite material according to any one of claims 1 to 3, characterized in that: 所述的抗氧化剂为单酚类抗氧化剂、硫代脂类抗氧化剂、复合抗氧化剂中的至少一种；The antioxidant is at least one of monophenolic antioxidants, thiolipid antioxidants, and composite antioxidants; 所述的聚乙烯蜡的分子量为为1400～8000。The molecular weight of the polyethylene wax is 1400-8000. 7.权利要求1～6任一项所述的环保、阻燃的PVC木塑复合材料的制备方法，其特征在于包括以下步骤：7. The preparation method of the environment-friendly and flame-retardant PVC wood-plastic composite material according to any one of claims 1 to 6, characterized in that it comprises the following steps: (1)取聚氯乙烯树脂和稳定剂，加入高速混合机中混合，温度为85℃～95℃，混合8min～10min，不卸料；(1) Take polyvinyl chloride resin and stabilizer, add it to a high-speed mixer and mix at a temperature of 85°C to 95°C, mix for 8min to 10min, without unloading; (2)再依次向高速混合机中投入改性木粉、复合发泡剂、功能原料、碳酸钙、聚乙烯蜡、硬脂酸锌及抗氧化剂，混合8min～10min，混合温度为85℃～95℃，卸料冷却，得到环保、阻燃的PVC木塑复合材料。(2) Add modified wood flour, composite foaming agent, functional raw materials, calcium carbonate, polyethylene wax, zinc stearate and antioxidants into the high-speed mixer in turn, mix for 8 minutes to 10 minutes, and the mixing temperature is 85 ° C to 95°C, unloading and cooling to obtain environmentally friendly, flame-retardant PVC wood-plastic composite materials. 8.根据权利要求7所述的环保、阻燃的PVC木塑复合材料的制备方法，其特征在于：还包括8. the preparation method of environmental protection, fire-retardant PVC wood-plastic composite material according to claim 7, is characterized in that: also comprises (3)将步骤(2)混好的物料经双螺杆挤出机熔融挤出共混，通过水冷冷却后切粒，粒料经鼓风干燥箱干燥至含水率低于3％后，装袋；(3) The materials mixed in step (2) are melt-extruded and blended by a twin-screw extruder, and then pelletized after being cooled by water. The pellets are dried in a blast drying oven until the moisture content is lower than 3%, and then bagged ; (4)将步骤(3)所得干燥粒料投入卧式注塑机中，经注塑获得标准样条。(4) Put the dried pellets obtained in step (3) into a horizontal injection molding machine, and obtain standard splines through injection molding. 9.根据权利要求7或8所述的环保、阻燃的PVC木塑复合材料的制备方法，其特征在于：9. according to claim 7 or 8 described environmental protection, the preparation method of flame-retardant PVC wood-plastic composite material, it is characterized in that: 所述的改性木粉的制备方法，包括如下步骤：The preparation method of described modified wood flour, comprises the steps: 按11：1～9：1质量比称取木粉和马来酸酐接枝聚乙烯，混合，升温至85℃～95℃，混料10min～15min，得到改性木粉；Weigh wood flour and maleic anhydride grafted polyethylene according to the mass ratio of 11:1-9:1, mix them, heat up to 85°C-95°C, and mix the materials for 10min-15min to obtain modified wood flour; 所述的木粉为松木粉、杨木粉、杉木粉中的一种或几种混合物。The wood powder is one or a mixture of pine wood powder, poplar wood powder and fir wood powder.
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