CN103937278A - 3D printing wood-plastic composite material and preparation method thereof - Google Patents
3D printing wood-plastic composite material and preparation method thereof Download PDFInfo
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- CN103937278A CN103937278A CN201410198921.3A CN201410198921A CN103937278A CN 103937278 A CN103937278 A CN 103937278A CN 201410198921 A CN201410198921 A CN 201410198921A CN 103937278 A CN103937278 A CN 103937278A
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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]
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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
- B29C48/03—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
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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
- B29C48/395—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
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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
- B29C48/92—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
- B29C2948/92704—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
- B29C2948/92895—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
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
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Abstract
The invention relates to a 3D printing wood-plastic composite material and a preparation method thereof. The 3D printing material is composed of the following components in parts by weight: 100-150 parts of natural plant fiber, 125-175 parts of polyolefin plastic, 20-30 parts of mineral filler, 1-5 parts of coupling agent, 10-15 parts of dispersant, 5-10 parts of lubricant and 15-20 parts of toughener. The preparation method comprises the following steps: pulverizing the plant fibers, drying, modifying with the processing assistants, blending with the polyolefin granules, extruding the mixture with a double screw granulator to obtain a master batch, mixing the master batch and polyolefin in a certain mass ratio, extruding with a double screw extruder, carrying out wire drawing, and reeling. The 3D printing material has the appearance of the wood product and the processing characteristics of the wood-plastic material, has wide application range, and provides a more diversified environment-friendly material for 3D printing.
Description
Technical field
The invention belongs to 3D printed material manufacturing technology field, relate to and a kind ofly mould compound 3D printed material and preparation method with wood prepared by vegetable fibre and polyolefin plastics.
Background technology
3D prints and is called again rapid shaping technique, also referred to as increasing material manufacturing technology, be that one does not need conventional tool, fixture and lathe, but taking digital model file as basis, successively print to manufacture the technology of arbitrary shape article with the material that metal-powder or plastics etc. have a tackiness.The article that 3D printer can be manufactured are a lot, as aircraft, pistol, and food, human organ, toy for children etc. for another example.3D printing technique is an important breakthrough in world's manufacturing technology field over the past two decades.The integrated of the multidisciplinary technology such as mechanical engineering, computer technology, Numeric Control Technology, Materials science.3D prints the exploitation that the most difficult most crucial technology is printed material.Therefore the focus that the more various multi-functional 3D printed material of exploitation becomes future studies and application is with crucial.3D printed material of the present invention is a kind of novel material, has the performance of timber and plastics concurrently, for 3D prints the selection that more material aspect is provided.
It is that 3D prints conventional a kind of technology that melt extruded is piled up moulding (FDM) technology, and this technology utilizes thermoplastic polymer under molten state, extrudes from printing head, is then frozen into profile thin layer, then being formed by stacking in layer.At present, on market, the conventional polymer materials of this technology is poly(lactic acid) (PLA), acrylonitrile-butadiene-styrene (ABS) (ABS), nylon (PA), Polyphenylene Sulfone (PPSF) and polycarbonate (PC) etc.FDM requires material to have lower condensation shrinking percentage, steeper viscosity-temperature curve and higher intensity, rigidity, thermostability etc.
It is nontoxic, tasteless that polypropylene has, and mechanical property is good, easily processing, and corrosion-resistant, melt temperature is lower, good fluidity, speed of cooling is fast, transparent easy dyeing etc., and advantage all meets the requirement of 3D printing technique to polymer materials, and pp material source is wide, price is low; Polypropylene composites makes its dual nature that has timber and plastics concurrently, and adding of vegetable fibre further reduced polyacrylic condensation shrinking percentage, and the article that print have woodiness touch, has more friendliness.
Polypropylene composites is little as the document of 3D printed material at present.
China Patent Publication No. is that 102276920A discloses a kind of polypropylene composite material, adopt glass fibre, toughner, coupling agent, oxidation inhibitor, lubricant, Nucleating Agent on Pp to carry out modification, the tool intensity of the polypropylene composite material after modification is higher and creep-resistant property is better.But its affinity and heat-drawn wire modification to polypropylene composite material is few, can not meet well printing demand.
China Patent Publication No. is the processing procedure that 101781472A discloses a kind of composite material of plant fiber, it adds coupler and becomes mixing material, with high pass filter muller, mixing material is evenly mixed, it adopts to be mixed into micelle and to make composite finished product to add lubrication prescription, the characteristic that the material after modification has weight saving, is difficult for thermal distortion, thermal shrinkage force is little.But its affinity is not high, can not meets well 3D and print demand.
Single performance boost can not meet the performance requirement of 3D printing technique to polypropylene composites, is badly in need of the application widely in 3D printing technique of a kind of new polypropylene composites.
Summary of the invention
The pure plastics of the many uses of 3D printed material at present, plastic sense is strong, and affinity is poor, the present invention proposes a kind of 3D and prints polypropylene composites and preparation method thereof, makes the article that print have wooden friendliness.
The technical solution adopted for the present invention to solve the technical problems is: a kind of 3D prints wood plastic composite, and its component is counted by weight:
100～150 parts, vegetable fibre,
125～175 parts of polyolefin plasticss,
20～30 parts of mineral fillers,
1～5 part of coupling agent,
10～15 parts of dispersion agents,
5～10 parts of lubricants,
15～20 parts of toughner,
Wherein said vegetable fibre is selected the one of 600 order～800 object aspen fibers by using silicon, pine fiber, rice husk, agricultural crop straw; Described polyolefin plastics is selected wire drawing grade polypropylene; Coupling agent in described processing aid is selected the one of titanic acid ester, Aluminate, silane coupling agent; Lubricant is selected the one of paraffin, PP wax, PE wax; Dispersion agent is selected EBS; Toughner is selected the one of POE, EDPM; Described mineral filler is selected light calcium carbonate, talcous one.
The concrete implementation step that the present invention prepares 3D printing wood plastic composite is as follows,
Step 1: vegetable fibre is crushed to 600 order～800 orders, dry for standby; By polyolefin plastics dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing vegetable fibre according to weight part is 100～150 parts, and polyolefin plastics is 125～175 parts, 20～30 parts of mineral fillers, 1～5 part of coupling agent, 10～15 parts of dispersion agents, 5～10 parts of lubricants, toughner 15～20;
Step 3: the vegetable fibre that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the coupling agent that step 2 is weighed to continue to mix 10 minutes, add afterwards dispersion agent, the lubricant that step 2 is weighed to continue to mix 10 minutes, finally add polyolefin plastics, mineral filler, the toughner that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C; Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 110～120 DEG C, a district, two 115～125 DEG C, districts, three 120～130 DEG C, districts, four 125～135 DEG C, districts, five 130～140 DEG C, districts, six 135～145 DEG C, districts, seven 140～150 DEG C, districts, eight 145～155 DEG C, districts, nine 150～160 DEG C, districts, ten 160～170 DEG C of 155～165 DEG C, district head temperatures;
Step 5: the master batch that step 4 is obtained mixes by the mass ratio of 1:1 with polypropylene, extrude with twin screw extruder, wire drawing, detect with infrared analysis instrument, be processed into the filament that diameter is 1.75 ± 0.05mm, double-screw extruder screw diameter 15mm, length-to-diameter ratio 48:1, extrusion temperature is set as 130～140 DEG C, a district successively, two 140～150 DEG C, districts, three 155～165 DEG C, districts, four 155～165 DEG C, districts, five 155～165 DEG C, districts, six 165～175 DEG C, districts, seven 170～180 DEG C, districts, eight 180～190 DEG C, districts, nine 180～190 DEG C, districts, ten 190～200 DEG C of 190～200 DEG C, district head temperatures,
Step 6: filament is through water-cooled, air-dry, drum.
The invention has the beneficial effects as follows,
(1) the present invention uses conventional thermoplastics polypropylene, and source is wide, and price is low, and performance is excellent, has widened the range of choice of 3D printed material raw material;
(2) the present invention uses vegetable fibre filled polypropylene, makes wood plastic composite, makes goods have woodiness touch, has more friendliness, energy Partial digestion, more low-carbon environment-friendly;
(3) 3D that the present invention makes prints wood plastic composite and has good toughness, shock strength, the product high quality, high-impact, the high strength that print by 3D printing technique;
(4) cost of the present invention is low, and production technique is simple, is easy to suitability for industrialized production.
Embodiment
Below by embodiment, the present invention is described in further detail, but this should be interpreted as to scope of the present invention only limits to following instance.In the situation that not departing from aforesaid method thought of the present invention, various replacements or the change made according to ordinary skill knowledge and customary means, all should be within the scope of the present invention.
Embodiment 1
Step 1: aspen fibers by using silicon is crushed to 600 order～800 orders, dry for standby; By acrylic plastering dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing aspen fibers by using silicon according to weight part is 150 parts, and acrylic plastering is 75 parts, 30 parts of light calcium carbonates, 5 parts of titanic acid ester, 15 parts of EBS, 10 parts, paraffin, 20 parts of POE;
Step 3: the aspen fibers by using silicon that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the titanic acid ester that step 2 is weighed to continue to mix 10 minutes, add afterwards EBS, the paraffin that step 2 is weighed to continue to mix 10 minutes, finally add acrylic plastering, light calcium carbonate, the POE that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C;
Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 115 DEG C, a district, two 120 DEG C, districts, three 125 DEG C, districts, four 130 DEG C, districts, five 135 DEG C, districts, six 140 DEG C, districts, seven 145 DEG C, districts, eight 150 DEG C, districts, nine 155 DEG C, districts, ten 160 DEG C, districts, 165 DEG C of head temperatures;
Step 5: the master batch that step 4 is obtained mixes by the mass ratio of 1:1 with polypropylene, with twin screw extruder extrude, wire drawing, infrared analysis instrument detect, be processed into the filament that diameter is 1.75 ± 0.05mm, double-screw extruder screw diameter 15mm, length-to-diameter ratio 44:1, extrusion temperature is set as 130 DEG C, a district successively, two 140 DEG C, districts, three 155 DEG C, districts, four 155 DEG C, districts, five 155 DEG C, districts, six 165 DEG C, districts, seven 170 DEG C, districts, eight 180 DEG C, districts, nine 180 DEG C, districts, ten 190 DEG C of 190 DEG C, district head temperatures;
Step 6: filament is through water-cooled, air-dry, drum.
Material is carried out to Performance Detection, and result is as follows:
| Test item | Operative norm | Numerical value |
| Tensile strength (MPa) | ISO 527-2 | 38 |
| Elongation at break (%) | ISO 527-2 | 520 |
| 23 DEG C of (kJ/m of notched Izod impact strength 2) | ISO 179-1 | 3.66 |
| Melting index 2.16kg(g/10min) | ISO 1133 | 2.8 |
Embodiment 2
Step 1: aspen fibers by using silicon is crushed to 600 order～800 orders, dry for standby; By acrylic plastering dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing aspen fibers by using silicon according to weight part is 150 parts, and acrylic plastering is 175 parts, 25 parts of talcum powder, 3 parts of silane coupling agents, EBS12.5 part, 6 parts, PP wax, POE15 part;
Step 3: the aspen fibers by using silicon that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the silane coupling agent that step 2 is weighed to continue to mix 10 minutes, add afterwards EBS, the PP wax that step 2 is weighed to continue to mix 10 minutes, finally add acrylic plastering, talcum powder, the POE that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C;
Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 110 DEG C, a district, two 115 DEG C, districts, three 120 DEG C, districts, four 125 DEG C, districts, five 130 DEG C, districts, six 135 DEG C, districts, seven 140 DEG C, districts, eight 145 DEG C, districts, nine 150 DEG C, districts, ten 160 DEG C of 155 DEG C, district head temperatures;
Step 5: the particle that step 4 is obtained mixes by the mass ratio of 1:1 with polypropylene, with twin screw extruder extrude, wire drawing, infrared analysis instrument detect, be processed into the filament that diameter is 1.75 ± 0.05mm, double-screw extruder screw diameter 15mm, length-to-diameter ratio 48:1, extrusion temperature is set as 130～140 DEG C, a district successively, two 140 DEG C, districts, three 155 DEG C, districts, four 155 DEG C, districts, five 155 DEG C, districts, six 165 DEG C, districts, seven 170 DEG C, districts, eight 180 DEG C, districts, nine 180 DEG C, districts, ten 190 DEG C of 190 DEG C, district head temperatures:
Step 6: filament is through water-cooled, air-dry, drum.
Material is carried out to Performance Detection, and result is as follows:
| Test item | Operative norm | Numerical value |
| Tensile strength (MPa) | ISO 527-2 | 36 |
| Elongation at break (%) | ISO 527-2 | 515 |
| Shock strength (kJ/m 2) | ISO 179-1 | 3.81 |
| Melting index (g/10min) | ISO 1133 | 2.7 |
Embodiment 3
Step 1: pine fiber powder is broken to 600 order～800 orders, dry for standby; By acrylic plastering dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing pine fiber according to weight part is 125 parts, and acrylic plastering is 150 parts, 25 parts of light calcium carbonates, 3 parts of Aluminates, EBS12.5 part, 6 parts, paraffin, EDPM15 part;
Step 3: the pine fiber that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the Aluminate that step 2 is weighed to continue to mix 10 minutes, add afterwards EBS, the paraffin that step 2 is weighed to continue to mix 10 minutes, finally add acrylic plastering, light calcium carbonate, the EDPM that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C;
Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 110 DEG C, a district, two 115 DEG C, districts, three 120 DEG C, districts, four 125 DEG C, districts, five 130 DEG C, districts, six 135 DEG C, districts, seven 140 DEG C, districts, eight 145 DEG C, districts, nine 150 DEG C, districts, ten 160 DEG C of 155 DEG C, district head temperatures;
Step 5: the particle that step 4 is obtained mixes by the mass ratio of 1:1 with polypropylene, with twin screw extruder extrude, wire drawing, infrared analysis instrument detect, be processed into the filament that diameter is 1.75 ± 0.05mm, double-screw extruder screw diameter 15mm, length-to-diameter ratio 48:1, extrusion temperature is set as 130～140 DEG C, a district successively, two 140 DEG C, districts, three 155 DEG C, districts, four 155 DEG C, districts, five 155 DEG C, districts, six 165 DEG C, districts, seven 170 DEG C, districts, eight 180 DEG C, districts, nine 180 DEG C, districts, ten 190 DEG C of 190 DEG C, district head temperatures:
Step 6: filament is through water-cooled, air-dry, drum.
Material is carried out to Performance Detection, and result is as follows:
| Test item | Operative norm | Numerical value |
| Tensile strength (MPa) | ISO 527-2 | 39 |
| Elongation at break (%) | ISO 527-2 | 532 |
| Shock strength (kJ/m 2) | ISO 179-1 | 3.52 |
| Melting index (g/10min) | ISO 1133 | 2.7 |
Embodiment 4
Step 1: powdered rice hulls is broken to 600 order～800 orders, dry for standby; By acrylic plastering dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing rice husk according to weight part is 130 parts, and acrylic plastering is 150 parts, 25 parts of light calcium carbonates, 3 parts of titanic acid ester, EBS12.5 part, 6 parts, paraffin, POE15 part;
Step 3: the powdered rice hulls that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the titanic acid ester that step 2 is weighed to continue to mix 10 minutes, add afterwards EBS, the paraffin that step 2 is weighed to continue to mix 10 minutes, finally add acrylic plastering, light calcium carbonate, the POE that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C;
Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 110 DEG C, a district, two 115 DEG C, districts, three 120 DEG C, districts, four 125 DEG C, districts, five 130 DEG C, districts, six 135 DEG C, districts, seven 140 DEG C, districts, eight 145 DEG C, districts, nine 150 DEG C, districts, ten 160 DEG C of 155 DEG C, district head temperatures;
Step 5: the particle that step 4 is obtained mixes by the mass ratio of 1:1 with polypropylene, with twin screw extruder extrude, wire drawing, infrared analysis instrument detect, be processed into the filament that diameter is 1.75 ± 0.05mm, double-screw extruder screw diameter 15mm, length-to-diameter ratio 48:1, extrusion temperature is set as 130～140 DEG C, a district successively, two 140 DEG C, districts, three 155 DEG C, districts, four 155 DEG C, districts, five 155 DEG C, districts, six 165 DEG C, districts, seven 170 DEG C, districts, eight 180 DEG C, districts, nine 180 DEG C, districts, ten 190 DEG C of 190 DEG C, district head temperatures;
Step 6: filament is through water-cooled, air-dry, drum.
Material is carried out to Performance Detection, and result is as follows:
| Test item | Operative norm | Numerical value |
| Tensile strength (MPa) | ISO 527-2 | 38 |
| Elongation at break (%) | ISO 527-2 | 520 |
| Shock strength (kJ/m 2) | ISO 179-1 | 3.69 |
| Melting index (g/10min) | ISO 1133 | 2.9 |
Embodiment 5
Step 1: Wheat Straw is crushed to 600 order～800 orders, dry for standby; By acrylic plastering dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing Wheat Straw according to weight part is 125 parts, and acrylic plastering is 150 parts, 25 parts of light calcium carbonates, 3 parts of titanic acid ester, EBS12.5 part, 6 parts, PE wax, POE15 part;
Step 3: the Wheat Straw that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the titanic acid ester that step 2 is weighed to continue to mix 10 minutes, add afterwards EBS, the PE wax that step 2 is weighed to continue to mix 10 minutes, finally add acrylic plastering, light calcium carbonate, the POE that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C;
Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 110 DEG C, a district, two 115 DEG C, districts, three 120 DEG C, districts, four 125 DEG C, districts, five 130 DEG C, districts, six 135 DEG C, districts, seven 140 DEG C, districts, eight 145 DEG C, districts, nine 150 DEG C, districts, ten 160 DEG C of 155 DEG C, district head temperatures;
Step 5: the particle that step 3 is obtained mixes by the mass ratio of 1:1 with polypropylene, with twin screw extruder extrude, wire drawing, infrared analysis instrument detect, be processed into the filament that diameter is 1.75 ± 0.05mm, double-screw extruder screw diameter 15mm, length-to-diameter ratio 48:1, extrusion temperature is set as 130～140 DEG C, a district successively, two 140 DEG C, districts, three 155 DEG C, districts, four 155 DEG C, districts, five 155 DEG C, districts, six 165 DEG C, districts, seven 170 DEG C, districts, eight 180 DEG C, districts, nine 180 DEG C, districts, ten 190 DEG C of 190 DEG C, district head temperatures;
Step 6: filament is through water-cooled, air-dry, drum.
Material is carried out to Performance Detection, and result is as follows:
| Test item | Operative norm | Numerical value |
| Tensile strength (MPa) | ISO 527-2 | 37 |
| Elongation at break (%) | ISO 527-2 | 510 |
| Shock strength (kJ/m 2) | ISO 179-1 | 3.74 |
| Melting index (g/10min) | ISO 1133 | 2.8 |
Claims (9)
1. 3D prints a wood plastic composite, it is characterized in that:
Be made up of vegetable fibre, polyolefin plastics, mineral filler, processing aid, its master batch weight part is composed as follows:
100～150 parts, vegetable fibre;
125～175 parts of polyolefin plasticss;
20～30 parts of mineral fillers;
1～5 part of coupling agent;
10～15 parts of dispersion agents;
5～10 parts of lubricants;
15～20 parts of toughner.
2. 3D prints wood plastic composite according to claim 1, it is characterized in that: described vegetable fibre is selected the one in 600 order～800 object aspen fibers by using silicon, pine fiber, powdered rice hulls, agricultural crop straw powder.
3. 3D prints wood plastic composite according to claim 1, it is characterized in that: described polyolefin plastics is selected wire drawing grade polypropylene.
4. 3D prints wood plastic composite according to claim 1, it is characterized in that: coupling agent is selected the one in titanic acid ester, Aluminate, silane coupling agent.
5. 3D prints wood plastic composite according to claim 1, it is characterized in that: described lubricant is selected the one in paraffin, PP wax, PE wax.
6. 3D prints wood plastic composite according to claim 1, it is characterized in that: described dispersion agent is selected EBS.
7. 3D prints wood plastic composite according to claim 1, it is characterized in that: described toughner is selected the one in POE, EDPM.
8. 3D prints wood plastic composite according to claim 1, it is characterized in that: described mineral filler is selected the one in light calcium carbonate, talcum powder, and order number is more than 1000 orders.
9. 3D prints the preparation method of wood plastic composite according to claim 1, it is characterized in that, implements according to following steps:
Step 1: vegetable fibre is crushed to 600 order～800 orders, dry for standby; By mineral filler dry for standby, each raw material water ratio is less than 3%;
Step 2: weighing vegetable fibre according to weight part is 100～150 parts, and polyolefin plastics is 125～175 parts, 20～30 parts of mineral fillers, 1～5 part of coupling agent, 10～15 parts of dispersion agents, 5～10 parts of lubricants, toughner 15～20;
Step 3: the vegetable fibre that step 2 is weighed adds high mixer, treat that temperature rises to 70 DEG C, add the coupling agent that step 2 is weighed to continue to mix 10 minutes, add afterwards dispersion agent, the lubricant that step 2 is weighed to continue to mix 10 minutes, finally add polyolefin plastics, mineral filler, the toughner that step 2 weighs to continue to mix 10 minutes, temperature remains on 110～120 DEG C;
Step 4: by the compound obtaining in step 3 twin screw extruder granulation, double-screw extruder screw diameter is 75mm, length-to-diameter ratio 45:1, extruder temperature is set as successively: 110～120 DEG C, a district, two 115～125 DEG C, districts, three 120～130 DEG C, districts, four 125～135 DEG C, districts, five 130～140 DEG C, districts, six 135～145 DEG C, districts, seven 140～150 DEG C, districts, eight 145～155 DEG C, districts, nine 150～160 DEG C, districts, ten 160～170 DEG C of 155～165 DEG C, district head temperatures;
Step 5: the particle that step 4 is obtained mixes by the mass ratio of 1:1 with acrylic plastering, extrude and be processed into the filament that diameter is 1.75 ± 0.05mm with twin screw extruder, double-screw extruder screw diameter 15mm, length-to-diameter ratio 48:1, extrusion temperature is set as 130～140 DEG C, a district successively, two 140～150 DEG C, districts, three 155～165 DEG C, districts, four 155～165 DEG C, districts, five 155～165 DEG C, districts, six 165～175 DEG C, districts, seven 170～180 DEG C, districts, eight 180～190 DEG C, districts, nine 180～190 DEG C, districts, ten 190～200 DEG C of 190～200 DEG C, district head temperatures;
Step 6: filament is through water-cooled, air-dry, drum.
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