CN1227297C - Modified composite material of woods and plastics as well as its usage and manufacturing method - Google Patents
Modified composite material of woods and plastics as well as its usage and manufacturing method Download PDFInfo
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- CN1227297C CN1227297C CN 02104432 CN02104432A CN1227297C CN 1227297 C CN1227297 C CN 1227297C CN 02104432 CN02104432 CN 02104432 CN 02104432 A CN02104432 A CN 02104432A CN 1227297 C CN1227297 C CN 1227297C
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Abstract
The present invention relates to a modified composite material of wood and plastics, a use thereof and a manufacturing method thereof, which uses wood powder, and plastics or waste plastics as major raw materials, is matched with few auxiliary agents and uses a special grafting agent to carry out the processing of graft modification to the surfaces of the wood powder and the plastics so as to effectively enhance the boundary strength between the wood powder and the plastics. A continuous extruding technology is adopted, and various molds in a cross-sectional shape are used for extruding and producing various composite materials with high performance, wherein the component content of the wood powder exceeds 50%. Through the graft processing of the surfaces of the wood powder and the plastics, the present invention obviously enhances the tensile strength, the bending strength and the impact strength of the composite materials and can realize the industrial production of high-performance products, such as building engineering materials.
Description
Technical field
The present invention relates to a kind of modified composite material of woods and plastics, relate to a kind of sound insulation or rather; Heat insulation, good airproof performance, the intensity height, the modified composite material of good weatherability the invention still further relates to the purposes of above-mentioned matrix material and the manufacture method of this material.
Background technology
In order to make full use of resource, to mould Dai Mu, just to be suggested as far back as the seventies with the thinking of moulding Dai Gang as the effective means of protecting environment, cutting down the consumption of energy.Yet the today after 30 years, the application of wood-plastic products is still very little, seldom sees in the real life.Even in some developed country, this material is being made aspects such as wood-plastic door window, railroad ties, building template, car door shield, car inner piece and decorations, also just is in beginning and starting stage.The application of wood-plastic products, the scientific research technology that awaits further deeply and perfect, but in 21st century, will be developed rapidly, this has become the common recognition of department such as environmental protection, building, government and scientific circles.
Recent years, the research that wood is moulded compounding technology has become the domestic and international focus of studying of the same trade.Yet existing wood-plastic products performance is on the low side, unstable product quality, so in the prior art, the content of wood powder is all below 40% in the wood plastic composite, thereby the performance of wood plastic composite is undesirable, the performance of material more resembles plastics and does not resemble timber, if wood powder content is increased to more than 50%, its processing characteristics, intensity all can make moderate progress, but because the phase interface bonding strength between wood powder and plastics is low, cause the product mechanical property low, thereby cause quality product can't satisfy service requirements.And aspect wood-plastic door window profile, building template and other high-grade wood-plastic products, can not provide qualified product as yet at present.
Through technology retrieval, found domestic and international relevant open patent of invention to invention.One its plastics are limited to reprocessed plastic(s) for " composite of wood and plastics " (application number is 901026395), and plant fiber particle is mixing and compacting of routine with the processing of plastic raw materials and the apparatus and process of employing in its raw material, so its product is failed practical application.Another for " Wood flour filled PVC product ' (application number is 001299352), wherein wood powder content is less than 40%.Also has a patent " lignin plastics " (application number 941 13968.9), be to utilize mold pressing or injection moulding production, but fail to solve the low problem of phase interface bonding strength between the wood powder plastics, in a word, expect always on the industry that mechanical property is good, outward appearance and processing characteristics more approach the appearance of the wood-plastic products of timber.
Summary of the invention
The object of the present invention is to provide a kind of high strength, corrosion-resistant, good weatherability, outward appearance and processing characteristics more approach the wood plastic composite of timber.
The present invention realizes above-mentioned purpose by following composition, and said composition comprises (weight percent):
Wood powder: 55%---70%;
Vinylbenzene and methyl acrylate mix monomer: 2.0～8% (weight ratios 1: 2)
Be selected from any plastics among PVC, PP, the PE: 25～35%
Dibasic lead phosphite: 0.5～2.0%
Dibasic lead stearate: 0.2～1.5%
Lead stearate: 0.2～1.5%
Calcium stearate; 1.5～1.5%
ACR-201 (or 401): 1.0～3.0%
Lime carbonate: 1.0～10.0%
Macromolecule wax: 0.1～2.0%
Pigment: trace
Can add lead sulfate tribasic in the smooth finish above-mentioned composition for the resistance to impact shock that can better improve above-mentioned composition and thermostability and product:＞0～1.5%, CPE:＞0～4.0%, paraffin:＞0～1.0%, oxidized polyethlene wax:＞0～1.0%.
The preparation of above-mentioned composition is carried out in two steps suddenly, and concrete grammar is as follows:
The materials such as culled wood, branch, bamboo, rice husk, Pericarppium arachidis hypogaeae and plant stalk that will be main component with the xylon are crushed to less than behind the 30mm, wear into fineness 30 orders～300 purpose wood powders through pulverizing mill again, through blowing hot-air and 110 ℃～150 ℃ oven dry, make moisture≤2%, add 2.0-8.0% (weight ratio 1: 2) grafting agent vinylbenzene and methyl acrylate then, in high-speed mixer, be mixed to discharging in 5～20 minutes, become modified wood powder, its grafted wood powder be 40% of wood powder total amount.
This plastic fraction can be used novel plastic resin or plastic waste particle, also can use with by new, old plastics.The kind of plastics can be PVC, PP, PE etc., and waste or used plastics is handled through cleaning, fragmentation, oven dry used molding powder is made the pellet that granularity is 2～12mm, makes its moisture content≤2%.
With 50-70% (weight percent, gross weight with product is same under the benchmark), modified wood powder and plastic fraction and other auxiliary agent add high-speed mixer, rotating speed 800-1200rpm, after the high-speed mixing 5～20 minutes, discharging is to the low speed cold mixer, feed in the cold mixer barrel and be lower than 25 ℃ water coolant, temperature to be expected is lower than 55 ℃ of dischargings, make premix compound special. Preblend is added incongruous double screw exhaust skill go out machine and extrude continuously, in forcing machine, temperature of charge can reach 170～198 ℃, pressure can reach 20Mpa～37Mpa, at high temperature, under high pressure and the high shear, added grafting agent forms grafted chain on wood powder surface and plastics macromolecular chain, form physics and chemistry entanglement between the grafted chain, thereby significantly improved the bonding force between wood powder and plastics,, made the type material of high strength and high impact properties at high temperature through the mold cools down typing.
In the above-mentioned composition, except that wood powder and plastics, vinylbenzene and methyl acrylate are hot joining branch monomer, dibasic lead phosphite, lead sulfate tribasic, the hard ester lead of dibasic are thermo-stabilizer, lead stearate, calcium stearate and macromolecule wax are lubricant, CPE is an anti-impact modifier, and ACR-201 or 401 is a processing aid, and lime carbonate is reinforced filling.
Wherein shaper is taked vacuum adsorption type, and the cooling and shaping water temperature is 10 ℃～20 ℃; The extruder barrel temperature is 130C～195 ℃, and die head temperature is 160 ℃～200 ℃, the exhaust negative pressure of vacuum is-and 0.05Mpa～-0.1Mpa.
Also above-mentioned Preblend can be added single screw extrusion machine and carry out granulation earlier, add the degassing extruder extruded product again.Wherein each section of single screw extrusion machine machine letter temperature is 120 ℃～180 ℃, and die head temperature is 150 ℃～200 ℃.
By the innovation wood moulding material of above explained hereafter, produce various products, its performance reaches the wood-plastic door window fully, the requirement of building template and other high-grade wood-plastic products.Wood plastic composite technical indicator of the present invention is referring to table 1.
Test data is as follows:
| Performance | Numerical value | Unit | Testing standard |
| Water-intake rate | ≤0.4％ | ||
| Composite bending modulus | ≥2.6 | GPa | GB9341-88 |
| Bending strength | ≥40 | MPa | GB9341-88 |
| Modulus of compression | ≥1.0 | GPa | GB/T1041 |
| Compressive strength | ≥25 | Mpa | GB/T1041 |
| Shock strength | ≥90 | J/m | GB1843 |
| Vicat softening point | ≥85 | ℃ | GB/T1633 |
Have very high intensity and bending resistance and shock resistance through the matrix material of modification as can be seen by last table, the outward appearance of material of the present invention is similar to timber in addition, and can be with digging, saw, the mode of converted timbers such as cutter is processed, thereby it is heat insulation that this matrix material is had, sound insulation, good weatherability, do not corrode, advantages such as environmental stress resistance, fundamentally solved the low shortcoming of product mechanical strength of wooden molding technology before, wherein resistance to impact shock significantly improve the fragility problem that efficiently solves the product that produce originally, make wood mould compounding technology and be converted into actual high-performance commodity.And this wood plastic composite production energy consumption is low, all recyclings of waste material that production process produces, and non-environmental-pollution is typical Green Product.Utilize this wood plastic composite to can be made into various complicated shapes, the special-shaped engineering materials of dimensional stabilizing, as door and window section bar, building template, body of wall dividing plate, whole stair or the like; For the lower goods of requirement of strength such as flooring material, office furniture, park seat, fence etc., but exploitation and compositions all, and its range of application is extremely wide.
Further specify the present invention below by embodiment.
Embodiment 1:
The branch that will give up is removed dust, and wearing into fineness through pulverizing mill is 60 orders～100 purpose wood powders, through 110 ℃～150 ℃ oven dry, moisture≤2%; Again with the mixture of 4% vinylbenzene and methyl acrylate (weight ratio 1: 2) together, in high-speed mixer, be mixed to discharging in 8 minutes, become modified wood powder.
Getting weight ratio is 1: 1 the PVC plastics and the PVC plastics of recovery, and described recovery PVC plastics are through cleaning, after broken, oven dry handles, making moisture content≤2%, the granularity pellet less than 12mm.
With the raw material weight proportioning be: (is benchmark with the product gross weight)
Wood powder: 59%.
Vinylbenzene and methyl acrylate mix monomer: 4% (weight 1: 2)
PVC plastics: 26%
Dibasic lead phosphite: 1.0%
Lead sulfate tribasic: 0.5%
The hard plumbic acetate of dibasic; 0.1%
Lead stearate: 0.3%
Calcium stearate: 0.6%
CPE：3.0％
ACR-201：2.0％
Lime carbonate: 3.0%
Macromolecule wax: 0.2%
Paraffin: 0.3%
Raw material add high-speed mixer, rotating speed 800-1200rpm, high-speed mixing 10 minutes; Discharging is to the low speed cold mixer, feed 20 ℃ water coolant in the cold mixer letter wall, temperature to be expected is lower than 55 ℃ of dischargings, make premix compound special, Preblend is added the incongruous double screw degassing extruder extrudes continuously, make artificial board through the board mould cooling and shaping, wherein take the vacuum adsorption type shaper, the cooling and shaping water temperature is 10 ℃～18 ℃; The extruder barrel temperature is 130 ℃～195 ℃, and die head temperature is I60 ℃～200 ℃, right gas negative pressure of vacuum is-and 006MPa～-0.09Mpa.
Test data is as follows:
| Performance | Numerical value | Unit | Testing standard |
| Water-intake rate | ≥0.4％ | ||
| Composite bending modulus | 3.0 | GPa | GB9341-88 |
| Bending strength | 4.5 | MPa | GB9341-88 |
| Modulus of compression | 1.6 | GPa | GB/T1041 |
| Compressive strength | 30 | Mpa | GB/T1041 |
| Shock strength | 102 | J/m | GB1843 |
| Vicat softening point | 88 | ℃ | GB/T1633 |
Gained sheet material outward appearance and mode available converted timber similar to timber processed.
Embodiment 2:
Dried mao bamboon is cleaned out, be crushed to the following granularity of 30mm, wear into fineness 60 orders～100 purpose mao bamboon powder through pulverizing mill, through 110 ℃～150 ℃ oven dry, make vinylbenzene and methyl acrylate mixing object that moisture content≤2% back adds, in high-speed mixer, mix discharging in 15 minutes, obtain modification mao bamboon powder.
Plastic fraction adopts the PP Plastic Resin.
With the raw material weight proportioning be: (is benchmark with the product gross weight)
Mao bamboon powder: 66%;
Vinylbenzene and methyl acrylate mixture (weight ratio is 1: 2): 5%
Random PP virgin material: 23%
Calcium stearate: 0.6%
Lime carbonate: 2.5%
Paraffin: 0.8%
With raw material after the surface treatment and plastic fraction and other auxiliary agent adding high-speed mixer, rotating speed 800-1200rpm, high-speed mixing 18 minutes, discharging feed 20 ℃ water coolant to the low speed cold mixer in the cold mixer barrel, temperature to be expected is lower than 55 ℃ of dischargings, make Preblend, Preblend is added degassing extruder extrude continuously, make the imitation wood through the mold cools down typing, can be used for making dining table panel, bathroom partition plate, swimming pool floor or the like.Take the vacuum adsorption type shaper, the cooling and shaping water temperature is 14 ℃～20 ℃; The extruder barrel temperature is 160 ℃～210 ℃, and die head temperature is 190 ℃～230 ℃, the exhaust negative pressure of vacuum is-and 0.04MPa～-0.1Mpa.
Test data is as follows:
| Performance | Numerical value | Unit | Testing standard |
| Water-intake rate | ≥0.4％ | ||
| Composite bending modulus | 2.9 | GPa | GB9341-88 |
| Bending strength | 4.6 | MPa | GB9341-88 |
| Modulus of compression | 1.5 | GPa | GB/T1041 |
| Compressive strength | 28 | Mpa | GB/T1041 |
| Shock strength | 98 | J/m | GB1843 |
| Vicat softening point | 85 | ℃ | GB/T1633 |
The gained sheet material outward appearance utmost point is like timber, and the method for available converted timber reaches its processing.
Claims (4)
1. modified composite material of woods and plastics, it is characterized by: said composition comprises: wood powder: 55%-70%; 1: 2 vinylbenzene of weight ratio and methyl acrylate mix monomer: 2.0-8%; Be selected from any the plastics in polyvinylchloride, polypropylene PP, the polythene PE: 25-35%; Dibasic lead phosphite: 0.5-2.0%; Dibasic lead stearate: 0.2-1.5%; Lead stearate: 0.2-1.5%; Calcium stearate: 0.6-1.5%; Acrylic resin ACR-201 or 401:1.0-3.0%; Lime carbonate: 1.0-10.0%; Macromolecule wax: 0.1-2.0%; Above per-cent all is weight percentage, and is benchmark with the gross weight of product.
2. wood plastic composite according to claim 1, it is characterized by: except that above-mentioned component, can also add lead sulfate tribasic:＞0-1.5%, chlorinatedpolyethylene CPE:＞0-4.0%, paraffin:＞0-1.0%, oxidized polyethlene wax:＞0-1.0%, above per-cent all is weight percentage, and is benchmark with the gross weight of product.
3. the preparation method of the modified composite material of woods and plastics of a claim 1, it is characterized by: described matrix material is produced in two steps, 1) with fineness 30 orders-300 purpose wood powder, through blowing hot-air and 110 ℃ of-150 ℃ of oven dry, make moisture≤2%, 1: 2 the vinylbenzene of grafting agent weight ratio and the methyl acrylate that add 2.0-8.0% then mix discharging in 5-20 minute in high-speed mixer, become modified wood powder; 2) be choosing of 2-12mm with the described modified wood powder of 50-70% and moisture≤2% and the granularity of 25-35% from polyvinyl chloride PVC, polypropylene PP, described other auxiliary agent of the plastic fraction of polythene PE and claim 1 adds high-speed mixer, with rotating speed 800-1200rpm, after high-speed mixing 5-20 minute, discharging is to the low speed cold mixer, feed in the low speed cold mixer barrel and be lower than 25 ℃ water coolant, temperature to be expected is lower than 55 ℃ of dischargings, make Preblend, this Preblend is added extrusion equipment extrudes continuously, at high temperature finalize the design through mold cools down, above per-cent all is weight percentage, and is benchmark with the gross weight of product.
4. the preparation method of modified composite material according to claim 3, it is characterized by: in extrusion equipment, temperature of charge is 170-198 ℃, and pressure is 20Mpa-37Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 02104432 CN1227297C (en) | 2002-03-14 | 2002-03-14 | Modified composite material of woods and plastics as well as its usage and manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104432 CN1227297C (en) | 2002-03-14 | 2002-03-14 | Modified composite material of woods and plastics as well as its usage and manufacturing method |
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| CN1445285A CN1445285A (en) | 2003-10-01 |
| CN1227297C true CN1227297C (en) | 2005-11-16 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328312C (en) * | 2003-11-03 | 2007-07-25 | 倪斌 | Plant fibre-polypropylene composite material and preparation thereof |
| CN100443552C (en) * | 2004-04-06 | 2008-12-17 | 陈东禹 | Production of decorative sectional material |
| CN100432139C (en) * | 2006-05-08 | 2008-11-12 | 广东联塑科技实业有限公司 | Bamboo/plastic surfa#e crusting composite material and its preparation method x h |
| CN101323176B (en) * | 2007-06-11 | 2010-06-02 | 江苏四方机械集团有限公司 | Method for preparing plastic wood compound material/rigid foam composite and light weight type wall plate |
| CN101906741B (en) * | 2010-08-17 | 2011-11-30 | 东北林业大学 | Wood fiber-unsaturated polyester crosslinking type wood-plastic composite material and preparation method thereof |
| CN102167911B (en) * | 2011-05-30 | 2012-09-26 | 青岛永尚盛新型建筑材料科技有限公司 | Environmentally-friendly wood plastic composite material prepared from wastes and preparation method as well as application thereof |
| CN102558894A (en) * | 2012-02-21 | 2012-07-11 | 常熟市方塔涂料化工有限公司 | Method for preparing wood-like mould composite material |
| CN105924999A (en) * | 2016-07-07 | 2016-09-07 | 安徽国风木塑科技有限公司 | Toughening type modified wood-plastic composite material and preparation method thereof |
| CN106366687A (en) * | 2016-11-08 | 2017-02-01 | 佛山市炬业科技有限公司 | Material for making high-strength door pocket and preparation method of material |
| CN108586938A (en) * | 2018-05-22 | 2018-09-28 | 郁华 | Health injection foaming wood plastic composite |
| CN110978308A (en) * | 2019-07-15 | 2020-04-10 | 宁波有方儿童用品有限公司 | Production method of degradable wood-plastic mixture particles |
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