CN1915624A - Regenerated wood composite material, and wood-plastic shaped section by using the material - Google Patents
Regenerated wood composite material, and wood-plastic shaped section by using the material Download PDFInfo
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- CN1915624A CN1915624A CN 200610030671 CN200610030671A CN1915624A CN 1915624 A CN1915624 A CN 1915624A CN 200610030671 CN200610030671 CN 200610030671 CN 200610030671 A CN200610030671 A CN 200610030671A CN 1915624 A CN1915624 A CN 1915624A
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Abstract
A reclaimed wooden composition used to prepare the shaped wood-plastic materials is proportionally prepared from superfine fiber powder, superfine mineral powder, reclaimed plastics and coupling agent through mixing superfine fiber powder with pigment, impact breaking, cyclic colliding, drying, adding others, fusing while stirring, cooling while stirring, pulverizing, and preparing shaped wood-plastic materials.
Description
Technical field
Invention relates to a kind of reconstituted wood composite and uses the section bar of this forming materials, especially a kind of reconstituted wood composite and use the Wood-plastic profiles of this forming materials.
Background technology
At present, existing wood plastic composite or Wood plastic composite, its raw material are to be that 180～250 μ m, moisture content are that 3～8% wood powder adds waste plastics and the silane plastic shaping combines with coupling agent and other auxiliary agent by particle diameter; The composite material forming method that adopts is: thermosetting resin foaming substance and wood powder is mixed, applying high-speed stirred power makes the material self-friction be warmed up to 185～210 ℃, be dried and merge, and then add thermoplastic resin and puddle, make the graininess reconstituted wood synthetic resin of particle diameter below 15mm.But there are following problem in combination of raw materials and method of forming materials:
From the combination of raw materials analysis: on the one hand, the raw material of making wood powder only limit to timber and timber is useless, clout, and raw material exist limitation and contention for resource; On the other hand, particle diameter is that the wood powder of 180～250 μ m belongs to the fine powder state, contain the fibre membrane cell more than 20%, according to the wood cell formational theory, the parenchyma cell of timber has powerful aggregation, be the main path of timber moisture absorption and embrittlement,, cause material intensity in comprehensive service condition to reduce and loss easily so use the composite of the wood powder moulding of fine powder state.
Analyze from this composite material forming method: on the one hand, the crystalline melt point of resin is 175 ℃, the thermal cracking temperature of wood-fibred is 145～165 ℃, resin and wood powder are warmed up to more than 165 ℃ jointly, before resin does not reach thawing and parcel wood powder particle, the wood powder particle is easy to be burnt the carbonization of becoming estranged, and the ash content of generation will seriously reduce the intensity of composite; On the other hand, after the wood powder orientation of particles that is wrapped up by resin is arranged as fibrous strands, fill by resin in the gap of its fibrous strands, according to material knowledge, the molding shrinkage of thermoplastic resin is 1.0～2.5%, the product of using this forming materials is easy to produce and subsides and contraction distortion, causes the quality instability of shaped article.
Summary of the invention
The objective of the invention is to overcome the problem that exists in existing Wood-plastic profiles combination of raw materials and the method for forming materials.
For reaching above-mentioned purpose, the invention provides a kind of reconstituted wood composite, combine with coupling agent by superfine fibre powder, ultra-fine mineral powder, waste plastic regeneration material, plastic shaping, wherein, its preparation method is (each component is by weight percentage):
A, 38～41.6% superfine fibre powders mix with 3% colouring agent;
B, impact comminution, high circulation collision is dried to moisture content below 1%;
C, adding 25% ultra-fine mineral powder and 27～30% waste plastic regeneration material and plastic shaping coupling agent;
D, fusion are stirred;
E, mixing stirring;
E, cooling and stirring;
F, pellet are pulverized, and make finished product.
The present invention also provides the Wood-plastic profiles of the above-mentioned reconstituted wood composite material forming of a kind of usefulness, and its manufacture craft is (each component is by weight percentage):
A, be particle or the broken bar of 1～2mm with a kind of or levigate chopping of its composition in agricultural crop straw or wood chip or branch or shuck or the bamboo;
Metallic foreign body is removed in b, magnetic separation screening, and particle that particle diameter 2mm is above or broken bar return further chopping again;
C, drying, superfine powder are broken into the superfine fibre powder;
D, 38～41.6% superfine fibre powders and 3% colouring agent mix;
E, in the high-speed stirred kneader with 700～900rpm impact comminution, high circulation collision, 160 ℃ of high temperature dryings to moisture content below 1%;
F, adding 25% ultra-fine mineral powder and 27～30% waste plastic regeneration material and auxiliary agents, with 600～700rpm, fusion is stirred under 170～180 ℃ of high temperature in the high-speed stirred kneader;
G, in the high-speed stirred kneader with 200～400rpm, mixing stirring under 170～180 ℃ of high temperature;
H, send into the cooling and stirring machine, with 400～600rpm cooling and stirring;
I, be ground into graininess wood composite pellet;
J, push via mould by extruder, the thermoplastic filling, crystallisation by cooling, the scale saw is cut out, husky light, makes finished product.
On the such scheme basis, described graininess composite wooden material particle diameter is below 5mm.
Described superfine fibre powder, its particle diameter are 100 μ m～125 μ m, and moisture content is made through levigate by a kind of or its composition in agricultural crop straw or wood chip or branch or shuck or the bamboo below 5%.
Described waste plastic regeneration material is polypropylene PP reworked material or the polythene PE reworked material of melt index (MI) MFR at 2～8g/10min.
Described plastic shaping coupling agent is by acid anhydride-grafted ethylenic copolymer or methacrylic acid graft copolymer.
The invention has the beneficial effects as follows:
1, not only available timber of raw material and timber waste also expand to and use agricultural crop straw, shuck, bamboo field, and wide material sources and resource are renewable recycling;
2, use ultra-fine mineral powder, the dimensional instability of having avoided resin shrinkage to produce, strengthened the chemical-resistance of composite, avoided fiber grain to burn the mistake problem, use the specific area and the energy characteristic of superfine powder, the density of composite is enhanced about more than once, intensity and hardness improves more than 15%;
3, fiber powder and mineral powder have all adopted ultra-fine optimum grain-diameter and grain composition, thick, fine aggregate effect and lacing wire effect have not only been constructed, and the specific area of superfine powder uniqueness and the surface can with resin crosslinks esterification and molecular bond energyization, make behind the forming materials, the crosslinked body of material is that network is filled compact structure, obtains material internal stress thus by putting line again by reasonable transmission and the dispersion of line to face;
4, method of forming materials has prevented that the powder fiber from burning the mistake problem and former gathering powder is pulverized is non-gathering powder, makes that the melt and dissolved coated powder of resin surface is more abundant and more complete;
5, its moisture content of reconstituted wood composite material section bar of obtained by molding is less than 0.1% and non-hygroscopic, and material is even and the internal stress transmission is reliable and stable.
The specific embodiment
One, raw material are prepared
1, superfine fibre powder: by agricultural crop straw or wood chip or branch or shuck or bamboo is raw material, and through through chopping, dry, super levigate operation, the grain of formation is through being that 100～125 μ m, moisture content are at the powder below 5%;
2, ultra-fine mineral powder: the fineness grain is through being levigate talcum powder or the levigate kaolin below the 15 μ m, and control operation technique parameter is: silica SiO
2Content more than 60%, to burn the mistake rate be below 8%;
3, waste plastic regeneration material: polypropylene PP reworked material or polythene PE reworked material, control operation technique parameter is: melt index (MI) MFR=2～8g/100min, melting temperature are more than 145 ℃, pyrolysis temperature is 170～220 ℃;
4, plastic shaping coupling agent: by ethylenic copolymer acid anhydride-grafted or the methacrylic acid grafting, control operation technique parameter is: molecular weight is 30000, softening point is 145 ℃, and use amount is 0.5～5%.
5, other auxiliary agents: moulding used additives: the two Stearyl Amine EBS of ethylene, average fusing point is 165 ℃; Colouring agent: TCA titanium white composite pigment or iron oxide Huo Chrome lead plumbate salt.
Above-mentioned waste plastic regeneration material, the acid anhydride-grafted or vinyl of methacrylic acid grafting, ultra-fine mineral powder, auxiliary agent all can be bought from professional production factory or market.
Two, plant equipment
High-speed stirred kneader, cooling and stirring machine, blade type pulverizer, magnetic separation formula screening machine, powerful shredding machine etc. all can be bought from professional production factory.
The interior stirring system of above-mentioned high-speed stirred kneader is equipped with four layers of special-purpose stirring vane; Its bottom is an AO type blade, and function of use is the discharging of no dead angle; The truth of a matter is a SR type blade for two layers, and function of use is for pulverizing; The truth of a matter is a SO type blade for three layers, and function of use is high circulation, top load; Top layer is a PO type blade, and function of use is melt and dissolved.
Three, the preparation of reconstituted wood composite
1, chopping:, be particle or the broken bar of 1～2mm with powerful shredding machine chopping with agricultural crop straw or wood chip or branch or shuck or bamboo or its combination;
2, magnetic separation screening:, remove metallic foreign body via magnetic filter conveyer belt with above-mentioned particle or the broken bar magnetic separation formula screening machine of packing into; Screen out out particle or broken bar more than the particle diameter 2mm by reciprocating screen, turn back to shredding machine through conveyer belt and shred once more, tail over back following particle or the broken bar of particle diameter 2mm and enter next procedure;
3, drying and ultra-fine grinding: with above-mentioned particle or the dry also ultra-fine grinding of broken bar.The dry hot blast medium that uses, the air outlet temperature is controlled at 140～160 ℃, and the air-vent temperature is controlled to be 50～70 ℃, and the discharging opening temperature is controlled at 60～80 ℃, and spiral batcher rotating speed is controlled at 300～500rpm; Sieve the levigate corollary system of secondary outward with machine and carry out ultra-fine grinding, obtain that moisture content is reduced to below 5%, particle diameter is the superfine fibre powder of 100～125 μ m;
4, the one-level blended stock is dry to be stirred: will account for mixing ratio by weight and be 38～41.6% above-mentioned superfine fibre powder and 3% colouring agent and be mixed into the one-level blended stock, rotated at a high speed 15～20 minutes with 700～900rpm in the high-speed stirred of packing into the kneader, rely on the SR type blade of high-speed stirred kneader and the effect of SO type blade, make the one-level blended stock in impact comminution and high circulation impact force, produce 160 ℃ of high temperature, the steam that high temperature produces filters by high-speed stirred kneader upper discharge hole and discharges, its moisture content is reduced to below 0.1% by 5%, obtain the non-aggregation one-level blended stock of 41～44.6% dryings;
5, melt and dissolved stirring: under these conditions, temporarily stopped to stir 30 seconds and kept the blended stock temperature to descend and be less than 10 ℃, pack into 25% ultra-fine mineral powder and 27～30% waste plastic regeneration material and plastic shaping coupling agent, start the high-speed stirred kneader in 30 seconds once more, rotated at a high speed 10 minutes with 600～700rpm, rely on the SR type blade and the effect of PO type blade of high-speed stirred kneader, the waste plastic regeneration material is melted in 170～180 ℃, and esterification can be wrapped in superfine fibre powder surface and ultra-fine mineral powder surface with table with changing under the effect of high cyclic force;
6, mixing stirring: under these conditions, adjusting high-speed stirred kneader rotating speed is that 200～400rpm stirs 4～8 fens kinds, and the control temperature still is 170～180 ℃; Under the effect of high-speed stirred kneader PO type blade, assemble through the superfine fibre powder and the ultra-fine mineral powder generation of waste or used plastics parcel through the waste or used plastics parcel, obtain the gelatinous reconstituted wood synthesis material of high temperature; Open the discharge air valve then, under the effect of AO type blade, the high temperature synthesis material as a form of gel in the high-speed stirred kneader is exhausted into the cooling and stirring machine;
7, cooling and stirring: in above-mentioned mixing stirring, the cooling and stirring machine is started and the 400～600rpm that raises speed; After the reconstituted wood synthesis material for the treatment of the high temperature gel shape is discharged in the wall case water-jacket typ cooling and stirring machine, start cooling water recirculation system simultaneously, the control temperature of cooling water is 20 ℃ for the water inlet temperature, the delivery port temperature is below 35 ℃, cooling water pressure is controlled to be 0.3～0.5Mpa, carry out 15～20 fens kinds of cooling and stirring, under cooling and stirring machine SR type blade and the effect of refrigerant body, the reconstituted wood synthesis material drops to 120 ℃ and condense into gluing bulk from 180 ℃ gradually, harden fully when dropping to 80 ℃ by 120 ℃ again, cutting through cooling and stirring machine SR type blade, obtain radially less than 2.5mm～5mm, thickness is less than the piece material of 5mm, then when observation material in the manual observation hole of cooling and stirring machine reaches piece material standard, open the discharge air valve of cooling and stirring machine, the piece material is discharged to material collecting disc automatically under the effect of the AO of cooling and stirring machine blade;
8, pellet is pulverized: with the above-mentioned cooling block material that obtains; the blade type pelleter hopper of packing into; pulverizer rolls by the blade type cutting piece material is pulverized automatically; the screen cloth that meets aperture that size particles is provided with through the pulverizer bottom and be 5mm flows out to Material collecting box for harvesting, obtains the graininess composite wooden material of the irregular bodily form of required 0.5～5mm particle diameter.
Four, the moulding of reconstituted wood composite Wood-plastic profiles
As raw material, the hot blast temperature of putting into the setting of heat preservation and dryness machine inner drying machine is 80～85 ℃ with the above-mentioned graininess composite wooden material that obtains; Double screw extruder is warmed up to 160～185 ℃ simultaneously, the mould temperature heats up more than 160 ℃; Then raw material is taken out in the heat preservation and dryness machine and drop into the double screw extruder hopper, the rotating speed and the pressure that start extruder and adjust extruder enter forming process, and the maximum temperature of extruder is controlled at below 195 ℃; Material in the extruder hopper is extruded the machine screw motion and sends into the screw tube chamber, through the heater of extruder and the effect of screw slot variation, finish compression exhaust, thermoplastic, the closely knit process of thermoplastic with the material that screw axial moves in screw extruder, the material that the thrust that is produced by the extruder screw motion is closely knit with thermoplastic is clamp-oned mould by connecting the cavity flange again; The closely knit material of thermoplastic is still finished filling, thermoplastic shaping, crystallisation by cooling process and is obtained the Wood-plastic profiles blank with move mode in mould, continuation is squeezed depanning in the course of work that pushes away continuously at extruder, obtains the Wood-plastic profiles shaping blank of same cross sectional shape and random length; , obtain the Wood-plastic profiles consistent with the natural timber grain of wood after the scale saw is cut out, husky light.
Above-mentioned forming process is a continuous plant equipment course of work, and manually-operated is only carried out touch parameter adjustment for the supporting display screen of surveillance equipment, the adding gentle cooling and will adjust to the control requirement automatically of extruder.
Above-mentioned mould is formed the channel-type mould by filling cavity, inner tube of a tyre core, shell, according to the boundary of action function and temperature, is divided into filling area, thermoplastic shaping district, crystallisation by cooling district in theory; Filling area and thermoplastic shaping zone temperatures are controlled at 185～175 ℃, and the temperature in crystallisation by cooling district is controlled at 175 ℃ and falls progressively to 65 ℃; Filling area and thermoplastic shaping district are furnished with the electrode pair mould heats, by display screen observe variations in temperature and as required at any time touch display screen adjust temperature; The crystallisation by cooling district is furnished with interior recirculated cooling water duct, the operation of the outer loop of plugging into cooling water system; The adjustment of mold temperature is to observe variations in temperature by display screen, and the open and close cooling water valve that is located at mould chassis side is adjusted temperature at any time as required.
Above-mentioned scale saw is cut out, sand only adopts the wood working machine of existing market maturation to finish.
Claims (10)
1, a kind of reconstituted wood composite is combined with coupling agent by superfine fibre powder, ultra-fine mineral powder, waste plastic regeneration material, plastic shaping, it is characterized in that: its preparation method is (each component is by weight percentage):
A, 38～41.6% superfine fibre powders mix with 3% colouring agent;
B, impact comminution, high circulation collision is dried to moisture content below 1%;
C, adding 25% ultra-fine mineral powder and 27～30% waste plastic regeneration material and plastic shaping coupling agent;
D, fusion are stirred;
E, mixing stirring;
E, cooling and stirring;
F, pellet are pulverized, and make finished product.
2, a kind of reconstituted wood composite according to claim 1 is characterized in that: finished product is the graininess composite wooden material of particle diameter below 5mm.
3, a kind of reconstituted wood composite according to claim 1, it is characterized in that: described superfine fibre powder, its particle diameter is 100 μ m～125 μ m, moisture content is made through levigate by a kind of or its composition in agricultural crop straw or wood chip or branch or shuck or the bamboo below 5%.
4, a kind of reconstituted wood composite according to claim 1 is characterized in that: described waste plastic regeneration material is polypropene recycled materials or the recycled polyethylene of melt index (MI) MFR at 2～8g/10min.
5, a kind of reconstituted wood composite according to claim 1 is characterized in that: described plastic shaping coupling agent is by acid anhydride-grafted ethylenic copolymer or methacrylic acid graft copolymer.
6, a kind of Wood-plastic profiles with claim 1 reconstituted wood composite material forming is characterized in that: its manufacture craft is (each component is by weight percentage):
A, be particle or the broken bar of 1～2mm with a kind of or levigate chopping of its composition in agricultural crop straw or wood chip or branch or shuck or the bamboo;
Metallic foreign body is removed in b, magnetic separation screening, and particle that particle diameter 2mm is above or broken bar return further chopping again;
C, drying, superfine powder are broken into the superfine fibre powder;
D, 38～41.6% superfine fibre powders and 3% colouring agent mix;
E, in the high-speed stirred kneader with 700～900rpm impact comminution, high circulation collision, 160 ℃ of high temperature dryings to moisture content below 1%;
F, adding 25% ultra-fine mineral powder and 27～30% waste plastic regeneration material and auxiliary agents, with 600～700rpm, fusion is stirred under 170～180 ℃ of high temperature in the high-speed stirred kneader;
G, in the high-speed stirred kneader with 200～400rpm, mixing stirring under 170～180 ℃ of high temperature;
H, send into the cooling and stirring machine, with 400～600rpm cooling and stirring;
I, be ground into graininess wood composite pellet;
J, push via mould by extruder, the thermoplastic filling, crystallisation by cooling, the scale saw is cut out, husky light, makes finished product.
7, a kind of Wood-plastic profiles with the reconstituted wood composite material forming according to claim 6, it is characterized in that: graininess composite wooden material particle diameter is below 5mm.
8, a kind of Wood-plastic profiles according to claim 6 with the reconstituted wood composite material forming, it is characterized in that: described superfine fibre powder, its particle diameter is 100 μ m～125 μ m, moisture content is made through levigate by a kind of or its composition in agricultural crop straw or wood chip or branch or shuck or the bamboo below 5%.
9, a kind of Wood-plastic profiles with the reconstituted wood composite material forming according to claim 6, it is characterized in that: described waste plastic regeneration material is polypropene recycled materials or the recycled polyethylene of melt index (MI) MFR at 2～8g/10min.
10, a kind of Wood-plastic profiles with the reconstituted wood composite material forming according to claim 6, it is characterized in that: described plastic shaping coupling agent is by acid anhydride-grafted ethylenic copolymer or methacrylic acid graft copolymer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610030671 CN1915624A (en) | 2006-08-31 | 2006-08-31 | Regenerated wood composite material, and wood-plastic shaped section by using the material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610030671 CN1915624A (en) | 2006-08-31 | 2006-08-31 | Regenerated wood composite material, and wood-plastic shaped section by using the material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248571A (en) * | 2010-05-21 | 2011-11-23 | 北京恒通创新木塑科技发展有限公司 | Laminated wood plate forming equipment and method |
| CN101417459B (en) * | 2007-10-24 | 2012-12-26 | 石河子天露节水设备有限责任公司 | Method for producing wood plastic composite material using plant straw and waste plastic and material thereof |
| CN103601942A (en) * | 2013-10-29 | 2014-02-26 | 安徽省佳通塑胶制品有限公司 | Environment-friendly wood plastic sectional material processed by utilizing recycled plastics and straws and preparation method thereof |
| CN104910496A (en) * | 2015-06-30 | 2015-09-16 | 江苏旭华圣洛迪建材有限公司 | Magnetic antibacterial wood-plastic composite material |
| CN106891500A (en) * | 2017-03-21 | 2017-06-27 | 江苏肯帝亚木业有限公司 | A kind of production equipment of wood fibre heat modification wood plastic composite |
| CN108237610A (en) * | 2016-12-24 | 2018-07-03 | 周永固 | A kind of manufacture craft of environmental protection wood-plastic clad plate |
-
2006
- 2006-08-31 CN CN 200610030671 patent/CN1915624A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417459B (en) * | 2007-10-24 | 2012-12-26 | 石河子天露节水设备有限责任公司 | Method for producing wood plastic composite material using plant straw and waste plastic and material thereof |
| CN102248571A (en) * | 2010-05-21 | 2011-11-23 | 北京恒通创新木塑科技发展有限公司 | Laminated wood plate forming equipment and method |
| CN102248571B (en) * | 2010-05-21 | 2014-01-01 | 北京恒通创新木塑科技发展有限公司 | Laminated wood plate forming method |
| CN103601942A (en) * | 2013-10-29 | 2014-02-26 | 安徽省佳通塑胶制品有限公司 | Environment-friendly wood plastic sectional material processed by utilizing recycled plastics and straws and preparation method thereof |
| CN103601942B (en) * | 2013-10-29 | 2015-10-28 | 安徽省佳通塑胶制品有限公司 | A kind of environmental protection Wood-plastic profiles utilizing reprocessed plastic(s) and stalk to process and preparation method thereof |
| CN104910496A (en) * | 2015-06-30 | 2015-09-16 | 江苏旭华圣洛迪建材有限公司 | Magnetic antibacterial wood-plastic composite material |
| CN108237610A (en) * | 2016-12-24 | 2018-07-03 | 周永固 | A kind of manufacture craft of environmental protection wood-plastic clad plate |
| CN106891500A (en) * | 2017-03-21 | 2017-06-27 | 江苏肯帝亚木业有限公司 | A kind of production equipment of wood fibre heat modification wood plastic composite |
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Open date: 20070221 |