CN103435882A - Thermoplastic wood-plastic composite material and production method thereof - Google Patents

Thermoplastic wood-plastic composite material and production method thereof Download PDF

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CN103435882A
CN103435882A CN2013102796887A CN201310279688A CN103435882A CN 103435882 A CN103435882 A CN 103435882A CN 2013102796887 A CN2013102796887 A CN 2013102796887A CN 201310279688 A CN201310279688 A CN 201310279688A CN 103435882 A CN103435882 A CN 103435882A
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ash
plastic composite
wood
vegetable fibre
thermoplastic wood
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CN2013102796887A
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CN103435882B (en
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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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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00Compositions of lignin-containing materials
    • C08L97/02Lignocellulosic material, e.g. wood, straw or bagasse
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/045Reinforcing macromolecular compounds with loose or coherent fibrous material with vegetable or animal fibrous material
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/04Carbon
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/04Homopolymers or copolymers of ethene
    • C08L23/06Polyethene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/12Polypropene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00Compositions 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
    • C08L27/02Compositions 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
    • C08L27/04Compositions 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
    • C08L27/06Homopolymers or copolymers of vinyl chloride

Abstract

The present invention discloses a thermoplastic wood-plastic composite material and a production method thereof. Components of the material comprise, by weight, 20-70% of plant fibers, 20-70% of plastic, 5-25% of biomass power plant ash or biomass oil refinery ash, and 1-10 % of an auxiliary agent. The production method comprises: 1) a plant fiber pretreatment; 2) a plant fiber modification treatment, wherein one or a plurality of materials selected from a biomass power plant ash solution, a biomass oil refinery ash solution and a coupling agent is adopted to carry out a modification treatment on the surface of the plant fibers; 3) mixing, wherein the modified plant fibers, plastic particles, biomass power plant ash or biomass oil refinery ash, and an auxiliary agent are uniformly mixed according to a certain ratio; 4) granulation, wherein the mixed material is subjected to fusing plasticizing at a temperature of 110-180 DEG C and then is subjected to extrusion granulation; and 5) hot-press forming, wherein the particle material is subjected to hot-press forming to prepare the thermoplastic wood-plastic composite material. With the present invention, resource utilization of waste is achieved, and a wood-plastic composite material with characteristics of good mechanical property and good weathering resistance is obtained.

Description

Thermoplastic wood-plastic composite and production method thereof
Technical field
The present invention relates to polymer composite, refer to particularly a kind of thermoplastic wood-plastic composite and production method thereof.
Background technology
Along with industrial expansion; a large amount of waste or used plastics and discarded powder ash pollution on the environment are more and more serious; biomass ash and waste or used plastics are called " black and white rubbish " by people; not only had a strong impact on people's quality of life; and restricted the development of national economy; therefore, how to fully utilize waste or used plastics, biomass power plant ash and bio-oil factory lime-ash, it is turned waste into wealth becomes one of important problem of environment protection.
In addition, along with global resources are increasingly exhausted, the raising of social environment consciousness, in recent years timber and petroleum chemicals have been proposed to requirements at the higher level both at home and abroad, under such background, thermoplastic wood-plastic composite arises at the historic moment, thermoplastic wood-plastic composite is a class advanced composite material, refer to utilize polyethylene, polypropylene and polyvinyl chloride etc. to replace common resin adhesive to mix with useless vegetable fibre, then through the plastic processings such as extruding, mold pressing, injection molding, the sheet material of producing or section bar.Thermoplastic wood-plastic composite has overcome that strength of wood is low, variability reaches greatly the organic materials Young's modulus use limitation caused such as low, the advantage that has both timber and plastics, with wood materials, compare, its water-intake rate is low, is difficult for strain cracking, have than high-mechanical property, can be used for automobile, building materials, furniture, reach the industries such as logistics packaging, market application foreground is extensive.Yet, thermoplastic wood-plastic composite often needs to bear higher impact load in environment for use and transportation, and humidity, temperature, illumination, and the environmental factors such as bacterium can cause certain influence to physicals and the mechanical property of material, therefore, the mechanical property and the weathering resistance that how to improve constantly thermoplastic wood-plastic composite just become problem demanding prompt solution in the thermoplastic wood-plastic composite evolution.
Summary of the invention
Purpose of the present invention will provide a kind of thermoplastic wood-plastic composite and production method thereof exactly, when realizing changing rejected material to useful resource, makes this thermoplastic wood-plastic composite have good mechanical property and weathering resistance.
For achieving the above object, the technical solution used in the present invention is: a kind of thermoplastic wood-plastic composite, and component and the weight percent thereof of this material are as follows:
Further, the weight percent of described each component is as follows:
Further, the weight percent of described each component is as follows:
Further, the weight ratio of described vegetable fibre and described plastics is 9:10.
Further, the main component of described biomass electric power plant lime-ash or bio-oil factory lime-ash is silicate, calcium salt, and the compound of potassium, and its granularity is 1000~5000 orders, and length-to-diameter ratio is 3~6.Described biomass electric power plant lime-ash or bio-oil factory lime-ash are as auxiliary stopping composition.   
Further, described vegetable fibre is wood powder, rice husk, straw powder, and forestry three remains the combination of one or more arbitrary proportions in the thing powder.Vegetable fibre is for improving the toughness of material, stretchiness and tear resistance; Vegetable fibre content is too low, toughness drop, and the vegetable fibre too high levels, the plasticity variation, easily block and can not extrude in the material produce process.
Further, described plastics are waste and old polyethylene, polypropylene, reach the combination of one or more arbitrary proportions in polyvinyl chloride.Plastics are as matrix, for improving the thermoplasticity of matrix material.
Further, described auxiliary agent is coupling agent, whipping agent, initiator, antioxidant, tinting material, fire retardant, stablizer, mould inhibitor, reaches one or more in lubricant.In the production process of matrix material, can add as required the auxiliary agent of appropriate amount.
The production method of above-mentioned thermoplastic wood-plastic composite comprises the following steps:
1) pre-treatment of vegetable fibre: vegetable fibre being pulverized and sieved out granularity is, after 80~300 purpose particles, it is carried out to drying, makes the water ratio of vegetable fibre<5%;
2) modification of vegetable fibre: the biomass electric power plant lime-ash solution that is 3~7% by mass concentration, the bio-oil factory lime-ash solution that mass concentration is 3~7%, and account in the coupling agent of vegetable fibre weight 0.5% ~ 3% one or more the vegetable fibre modifying surface is processed;
3) mix: by the vegetable fibre after modification, plastic pellet, biomass electric power plant lime-ash or bio-oil factory lime-ash, reach auxiliary agent and mixed by described proportioning, standby;
4) granulation: mixture is fully fused under 110~180 ℃ to the rear extruding pelletization of plasticizing;
5) hot-forming: that the pellet after extruding pelletization is made to thermoplastic wood-plastic composite by hot-forming mode.
Wherein, biomass electric power plant lime-ash solution or bio-oil factory lime-ash solution combine with coupling agent treatment, and effect is more effective than individual curing.
Described step 2) in, described coupling agent is titanic acid ester, stearic acid, paraffin, isocyanic ester, and toxilic acid connects the combination of one or more arbitrary proportions in a polyethylene.With coupling agent, the vegetable fibre modifying surface is processed, to improve wood, moulded interface compatibility and mixing uniformity, the coupling agent consumption can not be too many, the superfluous tensile property of material and the shock resistance of can making on the contrary descends, certainly, amount coats not exclusively very little, affects treatment effect; Wherein, titanic acid ester itself is coupling agent, is also dispersion agent, lubricant, and tackiness agent, linking agent, catalyzer, also have the several functions such as antirust, anti-oxidant and fire-retardant concurrently.
In described step 4), first adopt double-screw plastic extrusion machine to fuse plasticizing, Temperature Setting is 110~170 ℃, and then adopts the single screw extrusion machine extruding pelletization, and it is 115~180 ℃ that single-screw machine head temperature is controlled, and the control extrusion pressure is 7~12MPa.Aspect expressing technique control, the temperature range can bear according to the melting of waste or used plastics and decomposition temperature and vegetable fibre is set each barrel district temperature value, the Temperature Setting of twin screw extruder is from 110 ~ 170 ℃, and in whole production process, keeps it constant; The temperature of single-screw machine head is controlled in 115 ~ 180 ℃ of temperature ranges, and keeps higher melt pressure.In addition, for preventing excess Temperature, occur that fiber burns phenomenon, the Temperature Setting of different plastics also has certain difference, and when preferably twin screw extruder is selected PE, temperature is preferably set to 110 ~ 120 ℃, preferably 140 ~ 150 ℃ of PP, preferably 150 ~ 170 ℃ of PVC; When single screw extrusion machine is selected PE, temperature is preferably set to 115 ~ 125 ℃, and PP is 170 ~ 180 ℃, and PVC is 165 ~ 178 ℃.Simultaneously, adjust in time the main technologic parameters such as temperature, screw speed, rate of feeding, pulling speed depending on the practical problems occurred in extrusion.
In described step 1), the vegetable fibre granularity after crushing and screening is 80~120 orders.
With existing Wood-plastic material, compare, the present invention has following advantage:
One, the present invention is with polyethylene (PE), polypropylene (PP), or the waste or used plastics such as polyvinyl chloride (PVC) is matrix resin, with wood powder, rice husk, or the discarded plant fiber such as stalk is filler, take biomass electric power plant lime-ash or bio-oil factory lime-ash as auxiliary packing production thermoplastic wood-plastic composite, grain pattern and particle size range that biomass electric power plant lime-ash or bio-oil factory lime-ash are special, make its fabulous auxiliary stopping composition that becomes wood plastic composite, match with the vegetable fibre stopping composition, improved together the toughness of material.
Its two, the solution of biomass electric power plant lime-ash or bio-oil factory lime-ash is basic solution, as the properties-correcting agent of vegetable fibre, can, to the Mierocrystalline cellulose alkalinisation treatment, be conducive to the vegetable fibre modification; And can the impurity small molecules in vegetable fibre be dissolved, make part pectin, xylogen and hemicellulose etc. in vegetable fibre low molecular impurity be dissolved to remove, make the vegetable fibre surface become coarse, binding ability between vegetable fibre and plastic pellet interface is strengthened; Can open the hydrogen bond on vegetable fibre surface, make fiber surface become loose, form many cavitys, these cavitys strengthen " locking force " of polymeric matrix and plant fiber stuffing; In this basic solution, existing polarity ion has again nonpolar ion, can play action of coupling agents to the combination of polarity vegetable fibre and non-polar polymer parent, make thermoplastic wood-plastic composite that final production goes out there is good resistance to compression, bending resistance, mechanical property and the physicals such as shock-resistant, and there is good water tolerance, be difficult for being damaged by worms, be difficult for long fungi, acid and alkali-resistance and erosion resistance are strong, long service life.
Its three, the biomass electric power plant lime-ash includes silicon and calcium, can play the effect of strengthening agent and lubricant; Bio-oil factory lime-ash, containing the saturated fatty alkyl hydrocarbon, can improve the heat storing and heat preserving function of material; The biomass electric power plant lime-ash has vesicular structure, can adsorb obnoxious flavour, and then the wood plastic composite of producing is nontoxic, pollution-free, radiationless, can 100% reclaiming, meet environmental requirement.
Its four, the present invention with the waste or used plastics particle as matrix resin, by proportioning reasonable in design, the thermoplastic wood-plastic composite operability of producing that is is strong, can saw, dig, follow closely, produce as required all size product, the local damage of product can be keeped in repair and be reproduced.
They are five years old, the present invention utilizes vegetable fibre, waste or used plastics, biomass electric power plant lime-ash or these cheap starting material of bio-oil factory lime-ash, by selecting reasonable component proportion and adding relevant auxiliary agent, produce a kind of reversibility recycle high-quality for wood section, realize changing rejected material to useful resource and when obtaining distinct economic, also significantly reduce the environmental pollution that waste brings, improved the added value of Wood-plastic material.
They are six years old, in production method of the present invention, except utilizing aforementioned basic solution and coupling agent to carry out modification to the vegetable fibre surface, effectively having improved wood moulds outside interface compatibility and mixing uniformity, also aspect expressing technique control, according to the feedstock property Optimizing Process Parameters, avoided burning phenomenon and blocked phenomenon.
The accompanying drawing explanation
The Production Flow Chart schematic diagram that Fig. 1 is a kind of thermoplastic wood-plastic composite.
The stereoscan photograph that Fig. 2 is bio-oil factory lime-ash.
The stereoscan photograph that Fig. 3 is the biomass cinder of electric power plant.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated, but the present invention is not limited to following embodiment.
A kind of production process of thermoplastic wood-plastic composite generally as shown in Figure 1, at first by waste wood, pulverized with pulverizer by the vegetable fibres such as rice husk or stalk, and carry out drying with power plant's steam waste heat and make its water ratio<5%; Then add properties-correcting agent to carry out surface modification treatment to vegetable fibre, and by proportioning by the vegetable fibre after modification, biomass electric power plant lime-ash or bio-oil factory lime-ash, plastic pellet (PE, PP, PVC), and appropriate auxiliary agent is put into mixing machine and mixed; Then, with twin screw extruder and single screw extrusion machine extruder grain, forcing machine processing heat energy also can utilize the biomass electric power plant steam waste heat; Finally by mould molding, make section bar, wrapped product completes whole production process.
Wherein, the main component of biomass electric power plant lime-ash or bio-oil factory lime-ash is silicate, calcium salt, and the compound of potassium, its granularity is 1000~5000 orders, length-to-diameter ratio is 3~6, usually length-to-diameter ratio is in 5 left and right, and as shown in Figure 2, the pattern of biomass electric power plant lime-ash and structure are as shown in Figure 3 for the pattern of bio-oil factory lime-ash and structure.
Embodiment 1
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: wood powder 70%, PE20%, biomass electric power plant lime-ash 9%, auxiliary agent 1%.
Concrete production process is as follows:
1) wood powder is carried out to pre-treatment
Sift out 80 purpose wood powders with standard sieve after pulverizing with pulverizer, then it is put in to constant temperature blower kiln successive drying 4 ~ 7 hours, drying temperature is controlled at 105 ℃, in drying process, regularly wood powder is weighed, until that twice weighing results finishes while substantially equating is dry, taking out wood powder, to be placed in sealing bag standby.
2) wood powder is carried out to modification
A, alkaline solution process wood powder: the biomass power plant ash solution that is 4% with mass concentration is as soak solution, and consumption is advisable with submergence wood powder just, and soak time is 48 hours, then water by wood powder wash be neutral after suction filtration oven dry;
B, by titanic acid ester, process wood powder: wood powder is put into to dry 5 hours of the constant temperature blower kiln of 105 ℃, dried wood powder is put into to high-speed mixer to be stirred, temperature is elevated to 90 ℃, take the titanic acid ester that accounts for wood powder weight 0.5% and put into high mixer, when being elevated to 100 ℃, temperature emits, and cooling standby.
3) will be under 105 ℃ wood powder after the biomass electric power plant lime-ash (KD-1) after dry 5h and modification, PE particle, and the auxiliary agents such as antioxidant and fire retardant are put into mixing machine and mixed with the rotating speed of 1200 r/min together with proportioning.
4) compound is put into to parallel double-screw extruder and plastified granulation, and then enter single screw extrusion machine and extrude, pellet is mixed homogenizing in forcing machine.Aspect expressing technique control, according to melting and the decomposition temperature of PE, and the temperature range that wood powder can bear set each barrel district temperature value, and the Temperature Setting of twin screw extruder is 115 ℃, and in whole production process, keeps constant; The temperature of single-screw machine head is controlled in 120 ℃ of temperature ranges, has kept higher melt pressure, looks the processing parameter that the particular problem occurred in extrusion can suitably be adjusted equipment simultaneously.
5) pellet of extruding is passed through to the geometrical shape moulding of mold component, produce the finished product.
After testing, the ultimate compression strength of this product reaches 30MPa, and flexural strength reaches 20MPa, and composite bending modulus reaches 500MPa, and elongation at break is 150%, oxygen index > 25, use temperature is-10 ℃~85 ℃, mechanical property and weathering resistance are good.
Embodiment 2
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: rice husk 45%, PP 45%, biomass electric power plant lime-ash (KD-1) 5%, auxiliary agent 5%.
Concrete production process is as follows:
1) by sieving out granularity after the rice husk pulverizing, be that 100 purpose pellets are put into sweating room drying, dry 4h under 105 ℃;
The aminopropyl triethoxysilane coupling agent (KH550) that 2) will account for rice husk weight 2% mixes with the ratio of ethanol in 1:1, joins in rice husk, mixes 30min in high-speed mixer;
3) by the rice husk after above-mentioned modification, biomass electric power plant lime-ash (KD-1), PP, and the auxiliary agents such as initiator and tinting material join in high-speed mixer and mix the 10min discharging by proportioning, and under 105 ℃ dry 4h;
4) compound is put into to parallel double-screw extruder and plastified granulation, then compound is carried out in single screw extrusion machine to extruding pelletization, the single screw extrusion machine die head temperature is 160 ℃, the screw rod Heating Zone Temperature is followed successively by 170 ℃, 175 ℃, 170 ℃, screw speed is 40r/min, and logical water coolant carries out cooling;
5) pellet of extruding is passed through to the geometrical shape moulding of mold component, produce the finished product.
In said process, existence due to rice husk and biomass power plant ash (KD-1), make the volumetric expansion of compound, short texture, in order to guarantee the continuity of blanking, can adopt the mode that increases feeding quantity to avoid in extrusion sheet material or unlike material internal defect to affect compactness; In moulding process, strictly control die temperature, and logical cooling water ring winding board material interface is carried out cooling, thereby make each surface temperature of sheet material consistent, avoid occurring the different situation of shrinking percentage, make the situations such as sheet material or different in nature material warpage, impact is used and is attractive in appearance.
Product ultimate compression strength reaches 25MPa, and flexural strength reaches 20MPa, and composite bending modulus reaches 500MPa, and elongation at break is 150%, oxygen index > 25, use temperature-10 ℃~85 ℃, mechanical property and weathering resistance are good.
Embodiment 3
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: straw powder 20%, PVC 70%, bio-oil factory lime-ash (KD-2) 8%, auxiliary agent 2%.
Concrete production process is as follows:
1) crushed stalk being sieved out granularity is 80 purpose powders, then straw powder is put into to loft drier, dry 2h under 105 ℃;
Maleic anhydride inoculated polypropylene and the titanate coupling agent that 2) will account for straw powder weight 3% join in straw powder, in high-speed mixer, with 80 ℃, stir 15min, carry out modification;
3) by the straw powder after modification, bio oil factory lime-ash (KD-2), the auxiliary agents such as PVC and white carbon black, join in high-speed mixer and mix by proportioning, under 60 ℃, stirs 30min;
4) make pellet with twin screw extruder at 170 ℃;
5) prepare the mechanics batten product of matrix material with injection moulding machine.
Product ultimate compression strength reaches 25MPa, and flexural strength reaches 18MPa, and composite bending modulus reaches 600MPa, and elongation at break is 150%, oxygen index > 25, use temperature-10 ℃ ~ 85 ℃, mechanical property and weather resistance are good.
Embodiment 4
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: 60% straw powder and the surplus thing powder of forestry three, 30% PVC and PP, 5% bio-oil factory lime-ash (KD-2), auxiliary agent 5%.
Concrete production process is as follows:
1) the surplus thing of stalk and forestry three is ground to make granularity be to carry out drying after 120 purpose powder, make its water ratio<5%;
2) straw powder after drying and the surplus thing powder of forestry three are put into to the stirring of high mixer high speed, when temperature reaches 90 ℃, take the isocyanic ester that accounts for powder weight 1.5%, with evenly being sprayed onto in powder with watering can after 95% alcohol dilution, when being elevated to 100 ℃, temperature emits dry for standby;
3) by the material powder after modification, bio oil factory lime-ash (KD-2), PVC and PP, reach the auxiliary agents such as lubricant, joins in high-speed mixer by proportioning and mix, and stirs 30min under 60 ℃;
4) compound is put into to twin screw extruder and plastified granulation, then compound is carried out to mixing extrusion with 170 ℃ in single screw extrusion machine, extrusion pressure is controlled at 7 ~ 12MPa, flour milling pelletizing after the extruded stock cooling;
5) pellet of extruding is produced to the finished product by hot-forming mode.
The ultimate compression strength of product reaches 40MPa, and flexural strength reaches 18MPa, and composite bending modulus reaches 400MPa, elongation at break 150%, oxygen index > 25, use temperature-10 ℃~85 ℃, mechanical property and weather resistance are good.
Embodiment 5
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: straw powder 20%, PVC 50%, biomass electric power plant lime-ash (KD-1) 25%, auxiliary agent 5%.
Concrete production process is as follows:
1) crushed stalk being sieved out to granularity is 300 purpose powders, then straw powder is put into to loft drier, dry 2h under 105 ℃;
2) the bio-oil factory that is 5% by mass concentration ash solution is as soak solution, and consumption is advisable with just submergence straw powder, and soak time is 48 hours, and then water is washed straw powder to be neutral rear suction filtration and to dry;
And by titanic acid ester, stearic acid, paraffin co-treatment straw powder: straw powder is placed on to high-temperature stirring in high mixer, adds the titanic acid ester that accounts for straw powder weight 0.8% when temperature reaches 90 ℃, stearic acid and paraffin, mix about 10 minutes and emit, cooling standby.
3) by the straw powder after modification, biomass electric power plant lime-ash (KD-1), PVC, and the auxiliary agents such as mould inhibitor and fire retardant, join in high-speed mixer by proportioning and mix, and stirs 30min under 60 ℃;
4) make pellet with twin screw extruder and single screw extrusion machine;
5) produce the matrix material of moulding with injection moulding machine.
Product ultimate compression strength reaches 40MPa, and flexural strength reaches 19MPa, and composite bending modulus reaches 450MPa, and elongation at break is 150%, oxygen index > 25, use temperature-10 ℃ ~ 85 ℃, mechanical property and weather resistance are good.
Embodiment 6
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: wood powder 50%, PP 30%, biomass electric power plant lime-ash (KD-1) 10%, auxiliary agent 10%.
Concrete production process is as follows:
1) wood powder is carried out to pre-treatment
2) wood powder is carried out to modification
Alkaline solution is processed wood powder: the biomass power plant ash solution that is 7% with mass concentration is as soak solution, and consumption is advisable with submergence wood powder just, and soak time is 48 hours, then water by wood powder wash be neutral after suction filtration oven dry;
3) by the wood powder after dried biomass electric power plant lime-ash (KD-1) and modification, the PP particle, and the auxiliary agents such as tinting material and stablizer are put into mixing machine and are mixed together with proportioning.
4) compound is put into to parallel double-screw extruder and plastified granulation, and then enter single screw extrusion machine and extrude, pellet is mixed homogenizing in forcing machine.
5) pellet of extruding is passed through to the geometrical shape moulding of mold component, produce the finished product.
After testing, the ultimate compression strength of this product reaches 35MPa, and flexural strength reaches 20MPa, and composite bending modulus reaches 500MPa, and elongation at break is 150%, oxygen index > 25, use temperature is-10 ℃~85 ℃, mechanical property and weathering resistance are good.
Embodiment 7
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: wood powder 65%, PE25%, biomass electric power plant lime-ash (KD-1) 5%, auxiliary agent 5%.
Concrete production process is as follows:
1) wood powder is carried out to pre-treatment
2) wood powder is carried out to modification
A, alkaline solution process wood powder: the biomass power plant ash solution that is 3% with mass concentration is as soak solution, and consumption is advisable with submergence wood powder just, and soak time is 48 hours, then water by wood powder wash be neutral after suction filtration oven dry;
B, process wood powder with maleic anhydride grafted polyethylene again: the maleic anhydride grafted polyethylene that will account for wood powder weight 1.2% directly joins in the compound of wood powder and PE particle, in mixing machine, stirs standby.
3) by the wood powder after dried biomass electric power plant lime-ash (KD-1) and modification, the PE particle, and the auxiliary agents such as mould inhibitor and lubricant are put into mixing machine and are mixed together with proportioning.
4) compound is put into to parallel double-screw extruder and plastified granulation, and then enter single screw extrusion machine and extrude, pellet is mixed homogenizing in forcing machine.
5) pellet of extruding is passed through to the geometrical shape moulding of mold component, produce the finished product.
After testing, the ultimate compression strength of this product reaches 40MPa, and flexural strength reaches 19MPa, and composite bending modulus reaches 600MPa, and elongation at break is 150%, oxygen index > 25, use temperature is-10 ℃~85 ℃, mechanical property and weathering resistance are good.
Embodiment 8
Component and the weight percentage thereof of thermoplastic wood-plastic composite are as follows: wood powder and rice husk 36%, PE, PP, and PVC40%, biomass electric power plant lime-ash (KD-1) 20%, auxiliary agent 4%.
Concrete production process is as follows:
1) wood powder and rice husk are carried out to pre-treatment
2) wood powder and powdered rice hulls are carried out to modification
Alkaline solution is processed wood powder and powdered rice hulls: the bio-oil factory that is 5% with mass concentration ash solution is as soak solution, and consumption is advisable with just submergence wood powder and powdered rice hulls, and soak time is 48 hours, then water by wood powder and powdered rice hulls wash be neutral after suction filtration oven dry;
3) by wood powder and rice husk after dried biomass electric power plant lime-ash (KD-1) and modification, PE, PP, and PVC particle, and whipping agent, the auxiliary agents such as initiator and lubricant are put into mixing machine and are mixed together with proportioning.
4) compound is put into to parallel double-screw extruder and plastified granulation, and then enter single screw extrusion machine and extrude, pellet is mixed homogenizing in forcing machine.
5) pellet of extruding is passed through to the geometrical shape moulding of mold component, produce the finished product.
After testing, the ultimate compression strength of this product reaches 35MPa, and flexural strength reaches 20MPa, and composite bending modulus reaches 600MPa, and elongation at break is 150%, oxygen index > 25, use temperature is-10 ℃~85 ℃, mechanical property and weathering resistance are good.
The thermoplastic wood-plastic composite good mechanical properties that the present invention produces, be difficult for strain cracking, and mechanical property is high, and water-intake rate is low, can substitute log, the uses such as plastics and aluminium alloy in a lot of fields; From raw materials for production, the raw material of thermoplastic wood-plastic composite adopts the residuum of various waste or used plastics, waste wood and farm crop, has reduced plastic refuse and agricultural wastes and has burned the environmental pollution brought; The production of thermoplastic wood-plastic composite and use, environment does not distribute the volatile matter of harm humans health towards periphery, and itself goes back recoverable material, is a kind of ecological clean wood plastic composite.

Claims (12)

1. a thermoplastic wood-plastic composite, it is characterized in that: component and the weight percent thereof of this material are as follows:
2. thermoplastic wood-plastic composite according to claim 1 is characterized in that:
The weight percent of described each component is as follows:
3. thermoplastic wood-plastic composite according to claim 1 is characterized in that:
The weight percent of described each component is as follows:
4. thermoplastic wood-plastic composite according to claim 1, it is characterized in that: the weight ratio of described vegetable fibre and described plastics is 9:10.
5. according to the described thermoplastic wood-plastic composite of any one in claim 1 to 4, it is characterized in that: the main component of described biomass electric power plant lime-ash or bio-oil factory lime-ash is silicate, calcium salt, and the compound of potassium, its granularity is 1000~5000 orders, length-to-diameter ratio is 3~6.
6. according to the described thermoplastic wood-plastic composite of any one in claim 1 to 4, it is characterized in that: described vegetable fibre is wood powder, rice husk, straw powder, and forestry three remains the combination of one or more arbitrary proportions in the thing powder.
7. according to the described thermoplastic wood-plastic composite of any one in claim 1 to 4, it is characterized in that: described plastics are waste and old polyethylene, polypropylene, reach the combination of one or more arbitrary proportions in polyvinyl chloride.
8. according to the described thermoplastic wood-plastic composite of any one in claim 1 to 4, it is characterized in that: described auxiliary agent is coupling agent, whipping agent, initiator, antioxidant, tinting material, fire retardant, stablizer, mould inhibitor, reaches one or more in lubricant.
9. the production method of a thermoplastic wood-plastic composite claimed in claim 1 is characterized in that: comprise the following steps:
1) pre-treatment of vegetable fibre: vegetable fibre being pulverized and sieved out granularity is, after 80~300 purpose particles, it is carried out to drying, makes the water ratio of vegetable fibre<5%;
2) modification of vegetable fibre: the biomass electric power plant lime-ash solution that is 3~7% by mass concentration, the bio-oil factory lime-ash solution that mass concentration is 3~7%, and account in the coupling agent of vegetable fibre weight 0.5% ~ 3% one or more the vegetable fibre modifying surface is processed;
3) mix: by the vegetable fibre after modification, plastic pellet, biomass electric power plant lime-ash or bio-oil factory lime-ash, reach auxiliary agent and mixed by described proportioning, standby;
4) granulation: mixture is fully fused under 110~180 ℃ to the rear extruding pelletization of plasticizing;
5) hot-forming: that the pellet after extruding pelletization is made to thermoplastic wood-plastic composite by hot-forming mode.
10. the production method of thermoplastic wood-plastic composite according to claim 9, it is characterized in that: described step 2), described coupling agent is titanic acid ester, stearic acid, paraffin, isocyanic ester, and toxilic acid connects the combination of one or more arbitrary proportions in a polyethylene.
11. the production method according to claim 9 or 10 described thermoplastic wood-plastic composites, it is characterized in that: in described step 4), first adopt double-screw plastic extrusion machine to fuse plasticizing, Temperature Setting is 110~170 ℃, and then employing single screw extrusion machine extruding pelletization, it is 115~180 ℃ that single-screw machine head temperature is controlled, and the control extrusion pressure is 7~12MPa.
12. the production method according to claim 9 or 10 described thermoplastic wood-plastic composites is characterized in that: in described step 1), the vegetable fibre granularity after crushing and screening is 80~120 orders.
CN201310279688.7A 2013-07-05 2013-07-05 Thermoplastic wood-plastic composite and production method thereof CN103435882B (en)

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CN104387698A (en) * 2014-11-06 2015-03-04 安徽省三乐门窗幕墙工程有限公司 PVC (polyvinyl chloride) wood-plastic composite material produced from plant wastes and preparation method thereof
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CN105713407A (en) * 2016-01-29 2016-06-29 安徽以诺木塑板材科技有限公司 Insect prevention and mold prevention wood-plastic panel
CN106738182A (en) * 2016-12-09 2017-05-31 广西北海浩邦新能源科技有限公司 A kind of processing method of environment-friendly sheet
CN106827729A (en) * 2017-01-10 2017-06-13 东北林业大学 A kind of high temperature is coextruded Wood-plastic profiles
CN110294821A (en) * 2019-07-03 2019-10-01 广东工业大学 A kind of dispersing agent and its preparation method and application

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