CN102585533A - Method for preparing wood-plastic composite - Google Patents
Method for preparing wood-plastic composite Download PDFInfo
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- CN102585533A CN102585533A CN2012100112402A CN201210011240A CN102585533A CN 102585533 A CN102585533 A CN 102585533A CN 2012100112402 A CN2012100112402 A CN 2012100112402A CN 201210011240 A CN201210011240 A CN 201210011240A CN 102585533 A CN102585533 A CN 102585533A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 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 50
- 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 27
- 238000001035 drying Methods 0.000 claims abstract description 13
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 230000008569 process Effects 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 33
- 229920003023 plastic Polymers 0.000 claims description 33
- 238000012545 processing Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 235000013311 vegetables Nutrition 0.000 claims description 4
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000005453 pelletization Methods 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- -1 polyethylene Polymers 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
- 238000005516 engineering process Methods 0.000 description 5
- 229940089401 xylon Drugs 0.000 description 5
- 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
- 238000005303 weighing Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 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
- 239000012467 final product Substances 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
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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; With the excavation and the application of moulding substitute materials for wood, people have had certain innovation on the alternative modification technology to the same other materials of plastics, and especially plastic prod replaces some limited resources; Replace present wood materials in gardens like Wood-plastic material; Municipal administration, some application of home decoration, very good this field of insider.Wood-plastic material is because of a large amount of wood fibre constituents that add, and general content is more than 40%, and high reaches 70%.Problems such as tend to run into following problem in the course of processing of tradition Wood-plastic material: backguy is difficult, and 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 that the present invention will solve provide a kind of working (machining) efficiency high, can reduce the preparation method that the disconnected bar of backguy 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 manufacturing of the present invention can improve a lot.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is that a kind of preparation method of Wood-plastic material, the component of described Wood-plastic material comprise 100 parts of PE powders by weight, wood fibre 40-80 part; The preparation process may further comprise the steps:
101) wood fibre drying treatment makes xyloid fiber moisture content by weight less than 1%;
102) silane coupling agent with wood fibre weight 0.8-1.2% carries out coupling processing to the wood fibre surface;
103) wood fibre of PE powder with the process coupling processing stirred;
104) after the wood fibre crossed of PE powder and coupling processing stirs; Through the 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 ℃, the screw rod revolution is controlled at 350-450 rev/min;
105) twin screw extruder screw combinations end is the profile of tooth shunting disk, disperses to cut into the material bar through the profile of tooth shunting disk, and the material bar of twin screw extruder output is air-cooled through air cooling equipment, and after temperature was reduced to 30-50 ℃, wind was delivered to and is broken into particle in the crusher.
The preparation method of the above Wood-plastic material, step 101 adopts the pipeline type microwave drying installation, and drying temperature 80-90 ℃, conveying belt travelling speed 1-2 rice in the drying installation pipeline/minute.
The preparation method of the above Wood-plastic material is evenly drenched silane coupling agent in the interior bucket of the stirrer of going into to be equipped with wood fibre in the step 102, and stirring velocity is 400-500 rev/min.
The preparation method of the above Wood-plastic material; When temperature rises to 100 ℃ in the interior bucket bucket of stirrer; Add described PE powder, the speed with 500-600 rev/min in the stirrer stirred 2-3 minute once more, 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 the upper shed cylindrical shell, is used to add the mixture of PE powder and wood fibre; The 5th joint is used for the nature exhaust for the upper shed cylindrical shell; The 8th joint cylindrical shell has vacuum port, is furnished with the device that vacuumizes; The 9th joint is handpiece body, and the 2nd, 3,4,6,7,9 joints are the cylindrical shell of remaining silent, and the 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 the 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; The 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]
Through embodiment the present invention is further set forth below:
Embodiment 1:
Take by weighing 100 parts of raw material PE powders by weight, 50 parts of willow xylon powders, 1.5 parts in PE wax, 3 parts of compatilizers, 1,010 0.2 parts, 168 0.2 parts.
The PE powder is that density is 0.91-0.92g/cm
3, melting index is: and 1.7-2.5g/10min (190 ℃, 2.16KG), like the PC-1 of Bai Chen.Wood fibre powder granularity is greater than 80 orders.Compatilizer is a maleic anhydride inoculated polypropylene, if can the GPM200A of light, other auxiliary agents are the commercially available prod.
Embodiment 2:
Take by weighing raw material by weight: 100 parts of PE powders, 60 parts of willow xylon powders, 1.5 parts in PE wax, 3 parts of compatilizers, 1,010 0.2 parts, 168 0.2 parts.
The PE powder is that density is 0.91-0.92g/cm
3, melting index is: and 1.7-2.5g/10min (190 ℃, 2.16KG), like the PC-1 of Bai Chen.Wood fibre powder granularity is greater than 80 orders.Compatilizer is a maleic anhydride inoculated polypropylene, if can the GPM200A of light, other auxiliary agents are the commercially available prod.
Embodiment 3:
Take by weighing raw material by weight: 100 parts of PE powders, 70 parts of willow xylon powders, 1.5 parts in PE wax, 3 parts of compatilizers, 1,010 0.2 parts, 168 0.2 parts.
The PE powder is that density is 0.91-0.92g/cm
3, melting index is: and 1.7-2.5g/10min (190 ℃, 2.16KG), like the PC-1 of Bai Chen.Wood fibre powder granularity is greater than 80 orders.Compatilizer is a maleic anhydride inoculated polypropylene, if can the GPM200A of light, other auxiliary agents are the commercially available prod.
The preparation method of the Wood-plastic material of embodiment 1-3 is following:
1. to the thorough drying of wood fibre, the method for available Exposure to Sunlight is removed the interior part moisture of fiber earlier, wood fibre is put in the passage of pipeline microwave dryer carries out finish-drying then; Temperature is controlled at 0-120 ℃ in the equipment pipe; Conveying belt speed obtains according to experiment, for 10 meters long microwave dryers (commercially available prod is arranged) at 0-2 rice/minute controlled in the pipeline; Temperature is controlled at 80-90 ℃; Conveying belt is controlled at 1.5 meters/minute, guarantees the controlling fiber moisture content below 1%, and moisture controlled can be tested through moisture content tester.
2. the good wood fibre of drying is carried out the coupling processing on surface, can select commercially available silane coupling agent for use, like commercially available prod KH550; Fiber is added in the impeller; This impeller need carry out certain transformation, and upper cover part need be made 1 liquid and add groove, communicates with bucket in the stirrer; Liquid is through the control of adjustment regulated valve in the groove; Above-mentioned KH550 coupling agent adds in the liquid tank in the ratio of wood fibre weight 1%, when starting impeller, regulates liquid valve the KH550 coupling agent is evenly drenched in the bucket of going into to be equipped with wood fibre, and stirring velocity is 400-500 rev/min.When temperature in the agitation vat is raised to 100 ℃, shuts down and to open the lid remaining component (main body is the PE powder) of will fill a prescription and together add in the impeller speed with the 500-600 commentaries on classics and stir once more and got final product in 2-3 minute.
3. mixture is put into extruding pelletization in the specific twin screw extruder: twin screw extruder is extruded each section temperature and is respectively: 50/165/165/165/150/140/130/120/80 ℃; The screw rod revolution is controlled at 350-450 rev/min and is advisable; Screw configuration is main with quick conveying, 4-6 group mixing elements suitably is set, the present invention; Screw combinations is important integral part, below in addition screw combinations is carried out detailed argumentation.
The head section of twin screw extruder, for the ease of not receiving the control of material fluidity, head section has carried out certain improvement; Be different from conventional extruder head, do not adopt through modes such as extrusion die direct water-cooling tie rod or die face are fervent and come granulation, for Wood-plastic material high because of loading level; Mobile relatively 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 is like C30), and melt is divided into little bar segment through the dispersion of profile of tooth shunting disk; Under die head, connect a small hopper for material receiving, through multistage air cooling equipment; To expect that the bar temperature is reduced to about 30-50 ℃ that (it is fixed that blast system comes according to board output; Last step wind send the sonde-type TM is housed in the bucket, can accurately measure material temperature), directly wind is delivered to broken in the crusher (above from the air cooling equipment to the crusher equipment of this segment process all have commercially available) again; To expect that the bar particle diameter carries out further refinement and homogenizing, obtains the particle of Wood-plastic material then.
Twin screw extruder can be chosen 75A twin screw extruder type general on the market, like the 75A type twin screw extrusion equipment of the sincere mechanical means of Nanjing intelligence ltd, and 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, and wherein the 1st joint mainly is the mixture that is used to add raw material for the upper shed cylindrical shell, and the 5th joint is upper shed (zero position is in the 1160MM place of machine barrel body total length); Be mainly used in the nature exhaust, the 8th joint is furnished with the device that vacuumizes for vacuum port (zero position is in the 2030MM place of machine barrel body total length); The 9th joint is handpiece body, the 2nd, 3; 4,6,7; 9 joints are the cylindrical shell of remaining silent, and the cylindrical shell total length is 2610MM, and screw flight part total length is 2588-2592MM.
The 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 the transportation section.It is following that we optimize the instance of screw combinations according to this scheme, and 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 products).
The performance comparison situation:
The particle material that aforesaid method is accomplished granulation in convection oven under 110-120 ℃ the condition dry 3-5 hour earlier uses the particle material that drying is good to process the batten test with injection moulding machine then.Performance test data is following:
Table 1:
Table 2:
The material 1-3 xylon content that traditional technology is produced in the table 2 is: 50,60,70 parts; Be respectively corresponding with the content of embodiment 1-3 xylon.
Preparing method of the present invention has solved the difficult and unsettled difficult problem of granulation.The particle colour stable that preparation method of the present invention makes through twin screw extruder; Extrude stable; Output is high and do not receive restriction mobile and the tie rod mode, equal condition, and the output that traditional method prepares is 200-300KG/h; The output of using this programme preparation is as on the 400-550KG/, sustainable industrialization.
Can obtain as drawing a conclusion from the contrast of table 1 and table 2: according to above embodiment, during industrialization of the present invention, output promotes bigger, the consistence of material color, and it is stable to extrude backguy, does not have problem such as burn, and course of processing technology is simple, and is easy to operate.
More than the embodiment of the invention has been carried out detailed introduction, used concrete example among this paper principle of the present invention and embodiment set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. the preparation method of a 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; The preparation process may further comprise the steps:
101) wood fibre drying treatment makes xyloid fiber moisture content by weight less than 1%;
102) silane coupling agent with wood fibre weight 0.8-1.2% carries out coupling processing to the wood fibre surface;
103) wood fibre of PE powder with the process coupling processing stirred;
104) after the wood fibre crossed of PE powder and coupling processing stirs; Through the 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 ℃, the screw rod revolution is controlled at 350-450 rev/min;
105) twin screw extruder screw combinations end is the profile of tooth shunting disk, disperses to cut into the material bar through the profile of tooth shunting disk, and the material bar of twin screw extruder output is air-cooled through air cooling equipment, and after temperature was reduced to 30-50 ℃, wind was delivered to and is broken into particle in the crusher.
2. according to the preparation method of the said Wood-plastic material of claim 1, it is characterized in that step 101 adopts the pipeline type microwave drying installation, drying temperature 80-90 ℃, conveying belt travelling speed 1-2 rice in the drying installation pipeline/minute.
3. according to the preparation method of the said Wood-plastic material of claim 1, it is characterized in that in the step 102 silane coupling agent is evenly drenched in the interior bucket of the stirrer of going into to be equipped with wood fibre, stirring velocity is 400-500 rev/min.
4. according to the preparation method of the said Wood-plastic material of claim 3; It is characterized in that; When temperature rises to 100 ℃ in the interior bucket bucket of stirrer; Add described PE powder, the speed with 500-600 rev/min in the stirrer stirred 2-3 minute once more, and the wood fibre that PE powder and coupling processing are crossed stirs.
5. according to the preparation method of the said Wood-plastic material of claim 1, it is characterized in that the length-to-diameter ratio of described twin screw extruder: 36: 1, total barrel cylindrical shell 9 joints, wherein the 1st joint is the upper shed cylindrical shell, is used to add the mixture of PE powder and wood fibre; The 5th joint is used for the nature exhaust for the upper shed cylindrical shell; The 8th joint cylindrical shell has vacuum port, is furnished with the device that vacuumizes; The 9th joint is handpiece body, and the 2nd, 3,4,6,7,9 joints are the cylindrical shell of remaining silent, and the cylindrical shell total length is 2610MM, and screw flight part total length is 2588-2592MM.
6. according to the preparation method of the said Wood-plastic material of claim 5, it is characterized in that 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 the transportation section.
7. according to the preparation method of the said Wood-plastic material of claim 6, it is characterized in that 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.
8. according to the preparation method of the said Wood-plastic material of claim 1, it is characterized in that described wood fibre is that the fineness of vegetable fibre powder, vegetable fibre powder is 80 orders; The PE powder be melting index 1.7-2.5g/10min (190 ℃, PE powder 2.16KG).
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| CN102942797A (en) * | 2012-10-17 | 2013-02-27 | 广西大学 | Plant fiber wood-plastic composite material and preparation method thereof |
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| CN102585533B (en) | 2014-11-26 |
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