CN102585533B - Method for preparing wood-plastic composite - Google Patents
Method for preparing wood-plastic composite Download PDFInfo
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- CN102585533B CN102585533B CN201210011240.2A CN201210011240A CN102585533B CN 102585533 B CN102585533 B CN 102585533B CN 201210011240 A CN201210011240 A CN 201210011240A CN 102585533 B CN102585533 B CN 102585533B
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- wood fibre
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- 238000000034 method Methods 0.000 title abstract description 12
- 229920001587 Wood-plastic composite Polymers 0.000 title abstract 3
- 239000011155 wood-plastic composite Substances 0.000 title abstract 3
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000000843 powder Substances 0.000 claims abstract description 36
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 35
- 238000002360 preparation method Methods 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims description 29
- 229920003023 plastic Polymers 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 235000013311 vegetables Nutrition 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000005453 pelletization Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 2
- -1 polyethylene Polymers 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000002025 wood fiber Substances 0.000 abstract 6
- 239000004698 Polyethylene Substances 0.000 abstract 4
- 239000008187 granular material Substances 0.000 abstract 2
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 229940089401 xylon Drugs 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 241000124033 Salix Species 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92923—Calibration, after-treatment or cooling zone
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a method for preparing a wood-plastic composite. The wood-plastic composite comprises the following components in parts by weight: 100 parts of PE (polyethylene) powder and 40-80 parts of wood fibers. The preparation process comprises the following steps: 101) carrying out drying treatment on the wood fibers; 102) carrying out coupling treatment on the surfaces of the wood fibers by using a silane coupling agent which accounts for 0.8-1.2wt% of the wood fibers; 103) uniformly mixing the PE powder and the wood fibers subjected to coupling treatment; 104) after the PE powder and the wood fibers subjected to coupling treatment are uniformly mixed, carrying out extruding and granulating on the obtained mixture by using a double-screw extruder; and 105) carrying out air cooling on strip materials output by the double-screw extruder by an air-cooling device, then feeding into a crusher by air, and crushing the strip materials into granules, wherein a serrated diversion disc is arranged at the tail end of a screw assembly of the double-screw extruder. Granules prepared by using the method disclosed by the invention are good in dispersion, stable in color, stable in technological process and high in yield, and can be subjected to sustainable industrialization.
Description
[technical field]
The present invention relates to Wood-plastic material, relate in particular to a kind of preparation method of Wood-plastic material.
[background technology]
Along with to mould Dai Gang, to mould excavation and the application of substitute materials for wood, people have had certain innovation on to the alternative modification technology of the same other materials of plastics, especially plastic prod replaces some limited resources, as Wood-plastic material replaces present wood materials in gardens, municipal administration, some application of home decoration, very good this field of insider.Wood-plastic material is because adding in a large number wood fibre constituents, and general content is more than 40%, and high reaches 70%.In the course of processing of Traditional Wood moulding material, tend to run into following problem: bracing wire difficulty, the problem such as seriously disconnected bar and material burn, and output is lower, and performance is low.So traditional preparation method has limited the quick and stable industrialization process of Wood-plastic material.
[summary of the invention]
The technical problem to be solved in the present invention be to provide a kind of working (machining) efficiency high, can reduce the preparation method that the disconnected bar of bracing wire and material burn the Wood-plastic material of problem.The performance of the more traditional same type of material of performance of the Wood-plastic material of application manufacture of the present invention can improve a lot.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of preparation method of Wood-plastic material, and the component of described Wood-plastic material comprises 100 parts of PE powders by weight, wood fibre 40-80 part; Preparation process comprises the following steps:
101) wood fibre drying treatment, makes wooden fiber moisture content be less than by weight 1%;
102) with the silane coupling agent of wood fibre weight 0.8-1.2%, coupling processing is carried out in wood fibre surface;
103) PE powder and the wood fibre through coupling processing are stirred;
104) after the wood fibre that PE powder and coupling processing are crossed stirs, through twin screw extruder extruding pelletization, the temperature of each section of twin screw extruder respectively is: 45-55 ℃/160-170 ℃/160-170 ℃/160-170 ℃/145-155 ℃/135-145 ℃/125-135 ℃/115-125 ℃/85-95 ℃, screw rod revolution is controlled at 350-450 rev/min;
105) Assembled Twin Screw Extruder Screw end is profile of tooth shunting disk, through profile of tooth shunting disk, disperses to cut into material strip, and the material strip of twin screw extruder output is air-cooled through air cooling equipment, and temperature is reduced to after 30-50 ℃, and wind is delivered to and in crusher, is broken into particle.
The preparation method of the above Wood-plastic material, step 101 adopts pipeline type microwave drying installation, drying temperature 80-90 ℃, conveying belt travelling speed 1-2 m/min in drying installation pipeline.
The preparation method of the above Wood-plastic material, evenly drenches silane coupling agent in step 102 in the interior bucket of the stirrer that wood fibre is housed, and stirring velocity is 400-500 rev/min.
The preparation method of the above Wood-plastic material, when in the interior bucket bucket of stirrer, temperature rises to 100 ℃, add described PE powder, the speed with 500-600 rev/min in stirrer stirs 2-3 minute again, and the wood fibre that PE powder and coupling processing are crossed stirs.
The preparation method of the above Wood-plastic material, the length-to-diameter ratio of described twin screw extruder: 36: 1, total barrel cylindrical shell 9 joints, wherein the 1st joint is for upper shed cylindrical shell, for adding the mixture of PE powder and wood fibre; The 5th joint is for upper shed cylindrical shell, for natural exhaust; The 8th joint cylindrical shell has vacuum port, is furnished with the device vacuumizing; The 9th joint is handpiece body, and the 2nd, 3,4,6,7,9 joints are the cylindrical shell of remaining silent, and cylindrical shell total length is 2610MM, and screw flight part total length is 2588-2592MM.
The preparation method of the above Wood-plastic material, the screw combinations of twin screw extruder is: the 36-37% of screw flight part total length is got in blanking and compression section; Melt zone is got the 7-8% of screw flight part total length; Exhaust section is got the 22-23% of screw flight part total length, and fluxing zone is got the 11-12% of screw flight part total length; The 20-21% of screw flight part total length is got in transportation section.
The preparation method of the above Wood-plastic material, the screw rod of twin screw extruder is combined by following threaded block successively: 56/56A, 96/96SK, 96/48SK, 96/96, 72/72, 72/72, 64/64, 64/64, 64/64, 56/56, 56/56, 56/56, 56/56, 56/56, 56/56, 45/5/56, 60/4/56, 90/5/56, 72/36L, 96/96, 96/96, 72/72, 72/72, 72/72, 72/72, 64/64, 64/64, 56/56, 45/5/44, 45/5/56, 56/56, 56/56, 45/5/56, 72/36L, 96/96, 96/96, 72/72, 72/72, 72/72, 64/64, G12, C 30, G12, screw head.
The preparation method of the above Wood-plastic material, described wood fibre is that the fineness of vegetable fibre powder, vegetable fibre powder is 80 orders; PE powder be melting index 1.7-2.5g/10min (190 ℃, PE powder 2.16KG).
The particle that the preparation method of Wood-plastic material of the present invention obtains is scattered, colour stable, and stable technical process, output is high, sustainable industrialization.
[embodiment]
Below by embodiment, the present invention is further elaborated:
Embodiment 1:
Take by weight 100 parts of raw material PE powders, 50 parts of willow xylon powders, 1.5 parts, PE wax, 3 parts of compatilizers, 1,010 0.2 parts, 168 0.2 parts.
PE powder is that density is 0.91-0.92g/cm
3, melting index is: and 1.7-2.5g/10min (190 ℃, 2.16KG), as the PC-1 of Bai Chen.Wood fibre powder granularity is greater than 80 orders.Compatilizer is maleic anhydride inoculated polypropylene, if the GPM200A of light, other auxiliary agents are commercially available prod.
Embodiment 2:
Take by weight raw material: 100 parts of PE powders, 60 parts of willow xylon powders, 1.5 parts, PE wax, 3 parts of compatilizers, 1,010 0.2 parts, 168 0.2 parts.
PE powder is that density is 0.91-0.92g/cm
3, melting index is: and 1.7-2.5g/10min (190 ℃, 2.16KG), as the PC-1 of Bai Chen.Wood fibre powder granularity is greater than 80 orders.Compatilizer is maleic anhydride inoculated polypropylene, if the GPM200A of light, other auxiliary agents are commercially available prod.
Embodiment 3:
Take by weight raw material: 100 parts of PE powders, 70 parts of willow xylon powders, 1.5 parts, PE wax, 3 parts of compatilizers, 1,010 0.2 parts, 168 0.2 parts.
PE powder is that density is 0.91-0.92g/cm
3, melting index is: and 1.7-2.5g/10min (190 ℃, 2.16KG), as the PC-1 of Bai Chen.Wood fibre powder granularity is greater than 80 orders.Compatilizer is maleic anhydride inoculated polypropylene, if the GPM200A of light, other auxiliary agents are commercially available prod.
The preparation method of the Wood-plastic material of embodiment 1-3 is as follows:
1. pair wood fibre is fully dry, the method of available Exposure to Sunlight is first removed the interior part moisture of fiber, then wood fibre is put in the passage of pipeline microwave dryer and carries out finish-drying, in equipment pipe, temperature is controlled at 0-120 ℃, in pipeline, conveying belt speed is controlled at 0-2 m/min, according to experiment, obtain, for 10 meters of long microwave dryers (having commercially available prod), temperature is controlled at 80-90 ℃, conveying belt is controlled at 1.5 ms/min, guarantee to control fiber moisture content below 1%, moisture controlled can be tested by moisture content tester.
2. pair dried wood fibre carries out surperficial coupling processing, can select commercially available silane coupling agent, as commercially available prod KH550, fiber is added in homogenizer, this homogenizer need carry out certain transformation, upper cover part need be made 1 liquid and add groove, communicate with bucket in stirrer, in groove, liquid is controlled by adjusting regulated valve, above-mentioned KH550 coupling agent adds in liquid tank in the ratio of wood fibre weight 1%, when starting homogenizer, regulate liquid valve that KH550 coupling agent is evenly drenched and be equipped with in the bucket of wood fibre, stirring velocity is 400-500 rev/min.When in agitation vat, temperature is raised to 100 ℃, shutdown is opened lid and is together added the speed turning with 500-600 in homogenizer again to stir 2-3 minute the remaining component of filling a prescription (main body is PE powder).
3. mixture is put into extruding pelletization in specific twin screw extruder: twin screw extruder is extruded each section of temperature and is respectively: 50/165/165/165/150/140/130/120/80 ℃, screw rod revolution is controlled at 350-450 rev/min and is advisable, screw configuration be take and carried fast as main, 4-6 group mixing elements is suitably set, the present invention, screw combinations is important integral part, below in addition screw combinations is carried out to detailed discussion.
The head section of twin screw extruder, for the ease of not being subject to the control of material fluidity, head section has carried out certain improvement, be different from conventional extruder head, do not adopt by extrusion die direct water-cooling tie rod or die face is fervent etc. that mode is carried out granulation, for Wood-plastic material because of loading level high, mobility is poor, more crisp tie rod or the die face cutting of being difficult to of grain bar, the present invention directly removes extrusion die, end in screw combinations is installed profile of tooth shunting disk (commercially available prod, as C30), melt is divided into little bar segment by the dispersion of profile of tooth shunting disk, under die head, connect a small hopper for material receiving, through multistage air cooling equipment, material strip temperature is reduced to 30-50 ℃ of left and right, and (blast system is determined according to board output, last step wind send sonde-type thermometer is housed in bucket, energy Accurate Determining material temperature), directly wind is delivered to broken in crusher (equipment of this segment process all has commercially available from air cooling equipment to crusher above) again, material strip particle diameter is carried out to further refinement and homogenizing, then obtain the particle of Wood-plastic material.
Twin screw extruder can be chosen 75A twin screw extruder type general on market, as the 75A type twin-screw extrusion equipment of Nanjing Zhi Cheng mechanical means company limited, length-to-diameter ratio: 36: 1, the long 290MM of every joint cylindrical shell, the total barrel body of this machine is totally 9 joints, wherein the 1st joint is upper shed cylindrical shell, be mainly used for adding the mixture of raw material, the 5th joint is upper shed (the 1160MM place of zero position in machine barrel body total length), be mainly used in nature exhaust, the 8th joint is vacuum port (the 2030MM place of zero position in machine barrel body total length), is furnished with the device vacuumizing, the 9th joint is handpiece body, the 2nd, 3, 4, 6, 7, 9 joints are the cylindrical shell of remaining silent, cylindrical shell total length is 2610MM, screw flight part total length is 2588-2592MM.
Screw combinations scheme as: the 36-37% of screw flight part total length is got in blanking and compression section; Melt zone is got the 7-8% of screw flight part total length; Exhaust section is got the 22-23% of screw flight part total length, and fluxing zone is got the 11-12% of screw flight part total length; The 20-21% of screw flight part total length is got in transportation section.It is as follows that according to this scheme, we optimize the example of screw combinations, the screw rod of twin screw extruder is combined by following threaded block successively: 56/56A, 96/96SK, 96/48SK, 96/96, 72/72, 72/72, 64/64, 64/64, 64/64, 56/56, 56/56, 56/56, 56/56, 56/56, 56/56, 45/5/56, 60/4/56, 90/5/56, 72/36L, 96/96, 96/96, 72/72, 72/72, 72/72, 72/72, 64/64, 64/64, 56/56, 45/5/44, 45/5/56, 56/56, 56/56, 45/5/56, 72/36L, 96/96, 96/96, 72/72, 72/72, 72/72, 64/64, G12, C30, G12, screw head (above-mentioned screwing element is commercially available specification product).
Performance comparison situation:
The particle material that aforesaid method is completed to granulation is first dried 3-5 hour in convection oven under the condition of 110-120 ℃, then use dried particle material is made to batten test with injection moulding machine.Performance test data is as follows:
Table 1:
Table 2:
The material 1-3 xylon content that in table 2, traditional technology is produced is: 50,60,70 parts; Be respectively corresponding with the content of embodiment 1-3 xylon.
Preparation method of the present invention has solved granulation difficulty and a unsettled difficult problem.The particle colour stable that preparation method of the present invention makes by twin screw extruder, extrude stable, output is high and be not subject to the restriction of mobility and tie rod mode, equal condition, output prepared by traditional method is 200-300KG/h, the output of preparing with this programme is that 400-550KG/ is upper, sustainable industrialization.
From the contrast of table 1 and table 2, can obtain as drawn a conclusion: according to above embodiment, during industrialization of the present invention, output promotes larger, the consistence of material color, extrudes bracing wire stable, and without the problem such as burning, course of processing technique is simple, easy to operate.
Above the embodiment of the present invention is described in detail, has applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (5)
1. a preparation method for Wood-plastic material, is characterized in that, the component of described Wood-plastic material comprises 100 parts of PE powders by weight, wood fibre 40-80 part; Preparation process comprises the following steps:
101) wood fibre drying treatment, makes wooden fiber moisture content be less than by weight 1%;
102) with the silane coupling agent of wood fibre weight 0.8-1.2%, coupling processing is carried out in wood fibre surface;
103) PE powder and the wood fibre through coupling processing are stirred;
104) after the wood fibre that PE powder and coupling processing are crossed stirs, through twin screw extruder extruding pelletization, the temperature of each section of twin screw extruder respectively is: 45-55 ℃/160-170 ℃/160-170 ℃/160-170 ℃/145-155 ℃/135-145 ℃/125-135 ℃/115-125 ℃/85-95 ℃, screw rod revolution is controlled at 350-450 rev/min;
105) Assembled Twin Screw Extruder Screw end is profile of tooth shunting disk, through profile of tooth shunting disk, disperses to cut into material strip, and the material strip of twin screw extruder output is air-cooled through air cooling equipment, and temperature is reduced to after 30-50 ℃, and wind is delivered to and in crusher, is broken into particle;
The length-to-diameter ratio of described twin screw extruder is 36:1, total barrel cylindrical shell 9 joints, and wherein the 1st joint is for upper shed cylindrical shell, for adding the mixture of PE powder and wood fibre; The 5th joint is for upper shed cylindrical shell, for natural exhaust; The 8th joint cylindrical shell has vacuum port, is furnished with the device vacuumizing; The 9th joint is handpiece body, and the 2nd, 3,4,6,7,9 joints are the cylindrical shell of remaining silent, and cylindrical shell total length is 2610MM, and screw flight part total length is 2588-2592MM;
The screw combinations of twin screw extruder is: the 36-37% of screw flight part total length is got in blanking and compression section; Melt zone is got the 7-8% of screw flight part total length; Exhaust section is got the 22-23% of screw flight part total length, and fluxing zone is got the 11-12% of screw flight part total length; The 20-21% of screw flight part total length is got in transportation section;
The screw rod of twin screw extruder is combined by following threaded block successively: 56/56A, 96/96SK, 96/48SK, 96/96, 72/72, 72/72, 64/64, 64/64, 64/64, 56/56, 56/56, 56/56, 56/56, 56/56, 56/56, 45/5/56, 60/4/56, 90/5/56, 72/36L, 96/96, 96/96, 72/72, 72/72, 72/72, 72/72, 64/64, 64/64, 56/56, 45/5/44, 45/5/56, 56/56, 56/56, 45/5/56, 72/36L, 96/96, 96/96, 72/72, 72/72, 72/72, 64/64, G12, C30, G12, screw head.
2. the preparation method of Wood-plastic material according to claim 1, is characterized in that, step 101 adopts pipeline type microwave drying installation, drying temperature 80-90 ℃, conveying belt travelling speed 1-2 m/min in drying installation pipeline.
3. the preparation method of Wood-plastic material according to claim 1, is characterized in that, in step 102, silane coupling agent is evenly drenched in the interior bucket of the stirrer that wood fibre is housed, and stirring velocity is 400-500 rev/min.
4. the preparation method of Wood-plastic material according to claim 3, it is characterized in that, when in the interior bucket bucket of stirrer, temperature rises to 100 ℃, add described PE powder, speed with 500-600 rev/min in stirrer stirs 2-3 minute again, and the wood fibre that PE powder and coupling processing are crossed stirs.
5. the preparation method of Wood-plastic material according to claim 1, is characterized in that, described wood fibre is vegetable fibre powder, and the fineness of vegetable fibre powder is 80 orders; PE powder is the PE powder of melting index 1.7-2.5g/10min, and the test condition of melting index is 190 ℃, 2.16KG.
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| DE10327848B4 (en) * | 2003-06-18 | 2006-12-21 | Kay Brandenburg | Wood particle mixture for a wood-plastic composite and method for producing the wood particle mixture |
| CN100563999C (en) * | 2007-06-16 | 2009-12-02 | 宝鸡秦川未来塑料机械有限责任公司 | Conical double screw extruder special for wood plastic composite material |
| CN101747641B (en) * | 2010-02-05 | 2012-07-04 | 上海国成塑料有限公司 | Polyvinyl wood-plastic composite and method for preparing same |
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