WO2015000363A1 - Matériau composite thermoplastique à base de bois-plastique et son procédé de fabrication - Google Patents

Matériau composite thermoplastique à base de bois-plastique et son procédé de fabrication Download PDF

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WO2015000363A1
WO2015000363A1 PCT/CN2014/080202 CN2014080202W WO2015000363A1 WO 2015000363 A1 WO2015000363 A1 WO 2015000363A1 CN 2014080202 W CN2014080202 W CN 2014080202W WO 2015000363 A1 WO2015000363 A1 WO 2015000363A1
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composite material
plastic composite
ash
wood
plastic
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PCT/CN2014/080202
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Chinese (zh)
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陶磊明
张岩丰
郑兴才
程宇婷
方章建
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中盈长江国际新能源投资有限公司
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Publication of WO2015000363A1 publication Critical patent/WO2015000363A1/fr

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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
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/045—Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
    • 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
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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

Definitions

  • the invention relates to a polymer composite material, in particular to a thermoplastic wood-plastic composite material and a production method thereof. Background technique
  • Biomass ash and waste plastics are known as "black and white garbage", which not only seriously affects people's quality of life, but also restricts The development of the national economy, therefore, how to comprehensively use waste plastics, biomass power plant ash and biomass oil plant ash, making it a waste has become one of the important issues of environmental protection.
  • thermoplastic wood-plastic composite materials are A new type of composite material refers to a sheet or profile produced by using polyethylene, polypropylene and polyvinyl chloride instead of the usual resin adhesive and waste plant fiber, and then being subjected to extrusion, molding, injection molding and other plastic processing techniques.
  • Thermoplastic wood-plastic composite material overcomes the limitation of use caused by low strength, high variability and low elastic modulus of organic materials. It has the advantages of wood and plastic.
  • thermoplastic wood-plastic composites Compared with wood materials, its water absorption rate is low and it is not easy to be deformed and cracked. With high mechanical properties, it can be used in industries such as automobiles, building materials, furniture, and logistics packaging. However, thermoplastic wood-plastic composites often have to withstand high impact loads during use and transportation, and environmental factors such as humidity, temperature, light, and bacteria have an impact on the physical and mechanical properties of the materials. How to continuously improve the mechanical properties and weather resistance of thermoplastic wood-plastic composite materials has become an urgent problem to be solved in the development of thermoplastic wood-plastic composite materials. Summary of the invention
  • the object of the present invention is to provide a thermoplastic wood-plastic composite material and a production method thereof, which realizes the recycling of waste materials and makes the thermoplastic wood-plastic composite material have good mechanical properties and weather resistance.
  • thermoplastic wood-plastic composite material the composition of which is as follows:
  • weight percentage of each component is as follows:
  • weight percentage of each component is as follows:
  • the weight ratio of the plant fiber to the plastic is 9:10.
  • the main components of the biomass power plant ash or biomass oil plant ash are silicate, calcium salt, and potassium compound, and have a particle size of 1000 to 5000 mesh and an aspect ratio of 3 to 6.
  • the biomass power plant ash or biomass oil plant ash is used as an auxiliary filler.
  • the plant fiber is a combination of one or more of wood flour, rice husk, straw powder, and forestry three remnant powder. Plant fiber is used to improve the toughness, stretchability and tear resistance of the material; if the plant fiber content is too low, the toughness is lowered, and if the plant fiber content is too high, the plasticity is deteriorated, and the material is easily blocked and cannot be extruded during the production process.
  • the plastic is a combination of one or more of any of waste polyethylene, polypropylene, and polyvinyl chloride. Plastic is used as a matrix to increase the thermoplastic properties of the composite.
  • auxiliary agent is one or more of a coupling agent, a foaming agent, an initiator, an antioxidant, a colorant, a flame retardant, a stabilizer, a mold inhibitor, and a lubricant.
  • a coupling agent one or more of a coupling agent, a foaming agent, an initiator, an antioxidant, a colorant, a flame retardant, a stabilizer, a mold inhibitor, and a lubricant.
  • an appropriate amount of auxiliary agent may be added as needed.
  • thermoplastic wood-plastic composite material comprises the following steps:
  • Pretreatment of plant fiber the plant fiber is pulverized and sieved to a particle size of 80 to 300 mesh, and then dried to make the water content of the plant fiber ⁇ 5%; 2) Modification of plant fiber: Biomass power plant ash solution with mass concentration of 3 ⁇ 7%, biomass oil plant ash solution with mass concentration of 3 ⁇ 7%, and plant fiber weight 0.5% ⁇ 3
  • One or more of the % coupling agents modify the surface of the plant fiber;
  • Hot press forming A thermoplastic wood-plastic composite material is obtained by hot press forming the pellets after extrusion granulation. Among them, the combination of biomass power plant ash solution or biomass oil plant ash solution and coupling agent treatment has better effect than single treatment.
  • the coupling agent is a combination of one or more of titanate, stearic acid, paraffin, isocyanate, and maleic acid grafted polyethylene.
  • the surface of the plant fiber is modified with a coupling agent to improve the compatibility of the wood-plastic interface and the mixing uniformity.
  • the amount of the coupling agent should not be too much, and the excess may cause the tensile properties and impact resistance of the material to decrease. If the amount is too small, the coating is incomplete, which affects the treatment effect; wherein, the titanate itself is not only a coupling agent but also a dispersant, a lubricant, a binder, a crosslinking agent, a catalyst, and also has anti-rust and anti-oxidation. And a variety of functions such as flame retardant.
  • the twin-screw plastic extruder is first used for fusion plasticization, the temperature is set to 110 ⁇ 170 ° C, and then the single-screw extruder is used for extrusion granulation, and the temperature of the single-screw head is controlled to 115 to 180 ° C, the extrusion pressure is controlled to 7 to 12 MPa.
  • the temperature of each barrel is set according to the melting and decomposition temperature of the waste plastic and the temperature range that the plant fiber can withstand.
  • the temperature of the twin-screw extruder is set from 110 to 170 °C.
  • the temperature of the single screw head is controlled within the temperature range of 115 ⁇ 180 °C, and maintains a high melt pressure.
  • the temperature setting of different plastics is also different. It is preferable to set the temperature of the twin-screw extruder to be 110 to 120 ° C, and the PP to be 140 to 150 °. C, PVC is preferably 150 ⁇ 170°C; when the single screw extruder is used, the temperature is preferably set to 115 ⁇ 125°C, PP is 170 ⁇ 180°C, and PVC is 165 ⁇ 178°C.
  • the main process parameters such as temperature, screw speed, feed speed and traction rate are adjusted in time.
  • the plant fiber size after pulverization and sieving is 80 to 120 mesh.
  • the present invention Compared with the existing wood plastic materials, the present invention has the following advantages:
  • the present invention is based on waste plastics such as polyethylene (PE), polypropylene (PP), or polyvinyl chloride (PVC).
  • Fat using waste plant fiber such as wood flour, rice husk, or straw as filler, and producing thermoplastic wood-plastic composite material, biomass power plant ash or biomass oil with biomass power plant ash or biomass oil plant ash as auxiliary filler.
  • the special particle structure and particle size range of the plant ash slag make it an excellent auxiliary filler for wood-plastic composites, which cooperates with the plant fiber filler to improve the toughness of the material.
  • the solution of biomass power plant ash or biomass oil plant ash is an alkaline solution, used as a modifier of plant fiber, can alkalize cellulose, and is beneficial to plant fiber modification; Small molecules of impurities in the fiber are dissolved, so that some of the low-molecular impurities such as pectin, lignin and hemicellulose in the plant fiber are dissolved and removed, so that the surface of the plant fiber becomes rough, and the interface between the plant fiber and the plastic particle interface is combined.
  • the alkaline solution has both poles
  • the ions also have non-polar ions, which can act as a coupling agent for the combination of polar plant fibers and non-polar polymer matrix, so that the finally produced thermoplastic wood-plastic composite material has good compression resistance, bending resistance, It has mechanical properties and physical properties such as impact resistance, and has good water resistance, is not easy to be infected by insects, is not prone to long fungi, and is resistant to acid and alkali and corrosion. Long.
  • the biomass power plant ash contains silicon and calcium, which can act as a reinforcing agent and lubricant; the biomass oil plant ash contains saturated fat sulfhydryl hydrocarbon, which can improve the heat storage and heat preservation function of the material;
  • the power plant ash has a porous structure, which can absorb harmful gases, and the wood-plastic composite material produced is non-toxic, non-polluting, non-radiative, and can be recycled 100%, which meets environmental protection requirements.
  • the invention uses waste plastic particles as a matrix resin, and by designing a reasonable ratio, the thermoplastic wood-plastic composite material produced is highly usable, can be sawed, planed, nailed, and can be manufactured according to requirements. Partial damage can be repaired and rebuilt.
  • the invention utilizes low-cost raw materials such as plant fiber, waste plastic, biomass power plant ash or biomass oil plant ash, and produces a reversible recycling quality by selecting a reasonable group distribution ratio and adding related additives.
  • Wood profiles while achieving waste resources and achieving significant economic benefits, have also significantly reduced environmental pollution caused by waste and increased the added value of wood-plastic materials.
  • the production method of the present invention in addition to modifying the surface of the plant fiber by using the alkaline solution and the coupling agent, the compatibility of the wood-plastic interface and the mixing uniformity are effectively improved, and the extrusion process is also performed.
  • the process parameters are optimized according to the nature of the raw materials, avoiding charring and blocking.
  • Figure 1 is a schematic view showing the production process of a thermoplastic wood-plastic composite material.
  • Figure 2 is a scanning electron micrograph of the ash of the biomass oil plant.
  • Figure 3 is a scanning electron micrograph of the biomass power plant ash. detailed description
  • thermoplastic wood-plastic composite material The production process of a thermoplastic wood-plastic composite material is generally as shown in Fig. 1.
  • the plant fibers such as waste wood, rice husk or straw are pulverized by a pulverizer, and dried by steam heat of the power plant to make the water content ⁇ 5%;
  • the surface modification of the plant fiber is carried out by adding a modifier, and the modified plant fiber, the biomass power plant ash or the biomass oil plant ash, the plastic particles (PE, PP, PVC), and the appropriate amount are added according to the ratio.
  • the auxiliaries are mixed in a mixer; then, the granulation is performed by a twin-screw extruder and a single-screw extruder, and the heat energy of the extruder can also utilize the waste heat of the biomass power plant; Profiles, packaging products complete the entire production process.
  • the main components of biomass power plant ash or biomass oil plant ash are silicate, calcium salt, and potassium compound, the particle size is 1000 ⁇ 5000 mesh, the aspect ratio is 3 ⁇ 6, usually the aspect ratio At about 5, the morphology and structure of the ash and slag of the biomass oil plant are shown in Figure 2. The morphology and structure of the biomass ash slag are shown in Figure 3.
  • thermoplastic wood-plastic composite The composition of the thermoplastic wood-plastic composite and its weight percentage are as follows: wood powder 70%, PE 20%, biomass power plant ash 9%, auxiliary 1%.
  • the 80-mesh wood powder is sieved with a standard sieve, and then it is continuously dried in a constant temperature blast drying chamber for 4-7 hours, the drying temperature is controlled at 105 ° C, and the wood powder is regularly weighed during the drying process. , until the two weighing results are basically equal, the drying is finished, and the wood powder is taken out and placed in a sealed bag for use.
  • a. Alkali solution treatment of wood powder Use 4% mass concentration of biomass power plant ash solution as soaking liquid, the amount should be just immersed in wood powder, soaking time is 48 hours, then wash the wood powder with neutral water and then pump Filter and dry;
  • Treating wood powder with titanate The wood powder is placed in a constant temperature blast drying chamber at 105 ° C for 5 hours, and the dried wood powder is placed in a high-speed mixer and stirred, and the temperature is raised to 90 ° C.
  • the titanate which accounts for 0.5% of the weight of the wood flour, is weighed into a high-mixer. When the temperature rises to 10 CTC, it is cooled and ready for use.
  • the mixture is placed in a parallel twin-screw extruder for plasticizing and granulation, and then extruded into a single-screw extruder, and the pellets are mixed and homogenized in the extruder.
  • the temperature of each barrel is set according to the melting and decomposition temperature of PE and the temperature range that the wood powder can withstand.
  • the temperature of the twin-screw extruder is set to 115 ° C, and It is kept constant throughout the production process; the temperature of the single screw head is controlled within the temperature range of 12CTC, and the higher melt pressure is maintained.
  • the process parameters of the equipment can be appropriately adjusted depending on the specific problems occurring during the extrusion process.
  • the product After testing, the product has a compressive strength of 30MPa, a bending strength of 20MPa, a flexural modulus of 500MPa, an elongation at break of 150%, an oxygen index of >25, and a use temperature of -10°C to 85°C. Excellent mechanical properties and weather resistance.
  • thermoplastic wood-plastic composite The composition of the thermoplastic wood-plastic composite and its weight percentage are as follows: rice husk 45%, PP 45%, biomass power plant ash (KD-1) 5%, auxiliaries 5%.
  • the mixture is placed in a parallel twin-screw extruder for plasticizing and granulating, and then the mixture is subjected to extrusion granulation in a single-screw extruder.
  • the temperature of the single-screw extruder is 16 CTC, and the screw is heated.
  • the temperature of the zone is 170 ° C, 175 ° C, 170 ° C, the screw speed is 40 r / min, and is cooled by cooling water;
  • the product has a compressive strength of 25MPa, a bending strength of 20MPa, a flexural modulus of 500MPa, an elongation at break of 150%, an oxygen index of >25, a use temperature of -10°C to 85°C, excellent mechanical properties and weather resistance. .
  • thermoplastic wood-plastic composite The composition of the thermoplastic wood-plastic composite and its weight percentage are as follows: straw powder 20%, PVC 70%, biomass oil plant ash (KD-2) 8%, and auxiliary 2%.
  • pellets were produced at 17 CTC using a twin-screw extruder
  • the mechanical spline product of the composite material is prepared by an injection molding machine.
  • the product has a compressive strength of 25MPa, a bending strength of 18MPa, a flexural modulus of 600MPa, an elongation at break of 150%, an oxygen index of >25, a use temperature of -10°C to 85°C, excellent mechanical properties and weather resistance. .
  • thermoplastic wood-plastic composite The components of the thermoplastic wood-plastic composite and its weight percentage are as follows: 60% straw powder and forestry three residual powder, 30% PVC and PP, 5% biomass oil plant ash (KD-2) , 5% additives.
  • the extruded pellets are produced by hot press forming to produce the final product.
  • the product has a compressive strength of 40MPa, a bending strength of 18MPa, a flexural modulus of 400MPa, an elongation at break of 150%, an oxygen index of >25, a use temperature of -10°C to 85°C, excellent mechanical properties and weather resistance. .
  • thermoplastic wood-plastic composite The composition of the thermoplastic wood-plastic composite and its weight percentage are as follows: straw powder 20%, PVC 50%, biomass power plant ash (KD-1) 25%, auxiliaries 5%.
  • the straw powder is treated together with titanate, stearic acid and paraffin: the straw powder is placed in a high-mixing machine and stirred at a high temperature. When the temperature reaches 90 ° C, the titanate, stearic acid and 0.8% of the weight of the straw powder are added. Paraffin, mix and release for about 10 minutes, cool and set aside.
  • the molded composite material is produced by an injection molding machine.
  • the product has a compressive strength of 40MPa, a bending strength of 19MPa, a flexural modulus of 450MPa, an elongation at break of 150%, an oxygen index of >25, a use temperature of -10°C to 85°C, excellent mechanical properties and weather resistance. .
  • thermoplastic wood-plastic composite The composition of the thermoplastic wood-plastic composite and its weight percentage are as follows: wood powder 50%, PP 30%, biomass power plant ash (KD-1) 10%, additive 10%.
  • the specific production process is as follows: 1) Pretreatment of wood flour
  • Alkali solution treatment of wood powder Use 7% of biomass ash solution as the soaking solution, the amount should be just immersed in wood powder, soaking time is 48 hours, then wash the wood powder with neutrality with water and then filter Drying
  • the mixture is placed in a parallel twin-screw extruder for plasticizing and granulation, and then extruded into a single-screw extruder, and the pellets are mixed and homogenized in the extruder.
  • the product After testing, the product has a compressive strength of 35MPa, a bending strength of 20MPa, a flexural modulus of 500MPa, an elongation at break of 150%, an oxygen index of >25, and a use temperature of -10°C to 85°C. Excellent mechanical properties and weather resistance.
  • thermoplastic wood-plastic composite The composition of the thermoplastic wood-plastic composite and its weight percentage are as follows: wood powder 65%, PE 25%, biomass power plant ash (KD-1) 5%, auxiliary 5%.
  • Alkali solution treatment of wood powder Use 3% of biomass ash solution as the soaking solution, the amount should be just immersed in wood powder, soaking time is 48 hours, then wash the wood powder with neutral water and then pump Filter and dry;
  • Treat the wood powder with maleic anhydride grafted polyethylene Add maleic anhydride grafted polyethylene, which accounts for 1.2% by weight of wood powder, directly to the mixture of wood powder and PE particles, and mix well in a mixer. .
  • the mixture is placed in a parallel twin-screw extruder for plasticizing and granulation, and then extruded into a single-screw extruder, and the pellets are mixed and homogenized in the extruder.
  • the product After testing, the product has a compressive strength of 40MPa, a bending strength of 19MPa, a flexural modulus of 600MPa, an elongation at break of 150%, an oxygen index of >25, and a use temperature of -10°C to 85°C. Excellent mechanical properties and weather resistance.
  • Example 8
  • thermoplastic wood-plastic composite The components of the thermoplastic wood-plastic composite and its weight percentage are as follows: wood powder and rice husk 36%, PE, PP, and PVC 40%, biomass power plant ash (KD-1) 20%, and additives 4%.
  • Alkali solution treatment of wood flour and rice husk powder Use 5% of biomass oil plant ash solution as the soaking solution, the amount should be just immersed in wood powder and rice husk powder, soaking time is 48 hours, then use water to wood The powder and rice husk powder are washed neutrally, then filtered and dried;
  • the mixture is placed in a parallel twin-screw extruder for plasticizing and granulation, and then extruded into a single-screw extruder, and the pellets are mixed and homogenized in the extruder.
  • the product After testing, the product has a compressive strength of 35MPa, a bending strength of 20MPa, a flexural modulus of 600MPa, an elongation at break of 150%, an oxygen index of >25, and a use temperature of -10°C to 85°C. Excellent mechanical properties and weather resistance.
  • thermoplastic wood-plastic composite material produced by the invention has good mechanical properties, is not easy to be deformed and cracked, has high mechanical properties and low water absorption rate, and can be used for replacing logs, plastics and aluminum alloys in many fields; from the perspective of producing raw materials, thermoplastic wood-plastic composite
  • the raw materials of the materials use various waste plastics, waste wood and crop residues, which reduce the environmental pollution caused by plastic waste and agricultural waste incineration; the production and use of thermoplastic wood-plastic composite materials will not cause harm to the surrounding environment.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Cette invention concerne un matériau composite thermoplastique à base de bois-plastique et son procédé de fabrication, les composants et les pourcentages en poids du matériau étant comme suit : 20-70 % de fibres végétales, 20-70 % de matières plastiques, 5-25 % de cendres de centrale électrique à biomasse ou de cendres de moulin à huile à biomasse, et 1-10 % d'agent auxiliaire. Le procédé de fabrication comprend : 1) le prétraitement de la fibre végétale, 2) la modification de la fibre végétale : modification de la surface de la fibre végétale à l'aide de cendres de centrale électrique à biomasse et/ou de cendres de moulin à huile à biomasse et/ou d'un agent de couplage, 3) le mélange : mélange homogène en termes de rapport de la fibre végétale modifiée, de la particule plastique, des cendres de centrale électrique à biomasse, ou des cendres de moulin à huile à biomasse, et d'un agent auxiliaire, 4) la granulation : plastification du mélange à 110-180℃, extrusion et granulation, 5) le formage par presse à chaud : formage par presse à chaud de la matière granulaire pour obtenir le matériau composite thermoplastique à base de bois-plastique selon l'invention. L'invention permet de récupérer des ressources et d'obtenir un matériau composite thermoplastique à base de bois-plastique présentant simultanément une bonne performance mécanique et résistance aux intempéries.
PCT/CN2014/080202 2013-07-05 2014-06-18 Matériau composite thermoplastique à base de bois-plastique et son procédé de fabrication WO2015000363A1 (fr)

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CN201310279688.7A CN103435882B (zh) 2013-07-05 2013-07-05 热塑性木塑复合材料及其生产方法
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