CN101024709A - Moulding-grade wood-plastic composite and processing process - Google Patents
Moulding-grade wood-plastic composite and processing process Download PDFInfo
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- CN101024709A CN101024709A CN 200710020002 CN200710020002A CN101024709A CN 101024709 A CN101024709 A CN 101024709A CN 200710020002 CN200710020002 CN 200710020002 CN 200710020002 A CN200710020002 A CN 200710020002A CN 101024709 A CN101024709 A CN 101024709A
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Abstract
The invention relates to an injection moulding wood plastic compound material and the process technology. It is made up from recycled P or HDPE or PVC 100 portions, wood flour 80-130 portions, chlorinated polyethylene 5-10 portions, polyethylene wax 0.5-5.0 portions, geoceric acid or stearate 1.0-5.0 portions, nanometer reinforcing agent 4.0-8.0 portions, organic esters flexibilizer 5.0-15.0 portions, and PE grafted by maleic anhydride 5.0-20 portions. Mixing the materials at low speed (300-600round/min), high speed (1500-2500 round/min), low speed (300-600 round/min) for 5-10min, 25-40min, and 5-10min, the premixed material would be gained. After being extruded from extruder, the moulding wood plastic compound material would be gained. It could be widely used in producing complex shaped products.
Description
One, technical field
The present invention relates to a kind of injection-molding wood plastic composite and complete processing, specifying is a kind of injection-grade wood plastic composite and complete processing.
Two, background technology
The moulding process of wood plastic composite mainly contains following 2 kinds of modes both at home and abroad at present.
1, extrusion moulding
Carry out melt blending, extrusion moulding in the forcing machine with sending into after plastic pellet and wood powder and the additive mixing.Product is generally the certain section bar of cross-sectional shape.
2, compression molding
Carry out granulation in the extruding granulator with sending into after plastic pellet and wood powder and the additive mixing earlier, prepare wooden plastic particles.Then wooden plastic particles is filled in the close die heating, extrusion forming.The subject matter that exists is can only the simple sheet material based article of forming shape.
The goods that existing processes is used for the moulding complicated shape are subjected to significant limitation, and because the addition of wood powder is too high, and the mechanical property of goods is very poor, surface quality is undesirable.
Summary of the invention
The present invention will solve is exactly that the present wood plastic composite intensity that can not adopt injection moulding and existing wood plastic composite to exist is low, fragility big, surface quality difference and the single problem of shape of product.
The present invention adopts following technical scheme to produce injection-grade wood plastic composite:
1, adopt following technology that the nano level toughener is carried out coupling processing:
(1) take by weighing certain amount of nano level toughener, comprise in lime carbonate, talcum powder, aluminium hydroxide, the aluminum oxide any one or multiple, place air dry oven, under 80 ℃, dry 1h;
(2) take by weighing silane coupling agent or the titanate coupling agent that accounts for particle mass 3%, add alcohol solution in 1: 5 ratio, wherein the mass ratio of dehydrated alcohol and deionized water is 9: 1, places and stirs 1.5h on the constant temperature blender with magnetic force;
(3) add dehydrated alcohol in said mixture, the volume ratio of mixture/dehydrated alcohol is 1: 40, stirs 5～10min with glass stick, then said mixture is joined in the nano level toughener mechanical stirring 1.5h, rotating speed 450r/min;
(4) after stirring finishes, leave standstill 24h, the elimination supernatant liquid places air dry oven, under 80 ℃, and dry 24h.
2, adopt following raw materials according to mix by mass fraction: the consumption of regenerated PP (HDPE or PVC)/wood powder is 100/80～100/130 mass parts; The consumption of chlorinatedpolyethylene is 5～10 mass parts; The consumption of polyethylene wax is 0.5～5.0 mass parts; The consumption of stearic acid or its salt is 1.0～5.0 mass parts; Through the nano level toughener that silane coupling agent or titanate coupling agent are handled, comprise in lime carbonate, talcum powder, aluminium hydroxide, the aluminum oxide any one or multiple, its consumption is 4.0～8.0 mass parts; The consumption of organosilane ester such as dibutyl phthalate or dioctyl ester toughner is 5.0～15.0 mass parts; Compatilizer is the macromolecular compound of the maleic anhydride graft of molecular weight between 0.5～3.0 ten thousand, and its consumption is 5.0～20.0 mass parts.
3, above-mentioned material is passed through respectively low speed (300～600 rev/mins), (1500～2500 change), low speed (300～600 rev/mins) thorough mixing obtain matrix material Preblend after 5～10 minutes, 25～40 minutes, 5～10 minutes at a high speed.
4, above-mentioned Preblend can obtain the injection-grade wood plastic composite PP Pipe Compound behind the forcing machine extruding pelletization.
The prepared wood plastic composite PP Pipe Compound of the present invention has the excellent high-temperature flowing property, moulding processability is good, with low cost, can directly adopt the method forming process of injection moulding, broken through traditional wood plastic composite and can only adopt and extrude or the limitation of compression molding.Product is extruded non-carbonized, and surface gloss height, product have fabulous intensity and toughness, characteristics such as impact resistance height, woodiness touch are strong, fire-retardant.Can be widely used in the production of complicated shape goods, for example fields such as automobile, machinery, electronics, electrical equipment, artwork.
After testing, adopt the performance of the wood plastic composite that prescription of the present invention and technology makes as follows:
Proportion 0.96～1.1
Elongation at break 3～5%
Tensile modulus 3～6GPa
Tensile strength 25～45MPa
Composite bending modulus 3～6GPa
Bending strength 30～60MPa
Non-notch Izod shock strength 150～180J/m
Melting index 0.3～1.0g/10min
Embodiment:
Embodiment 1:
(1) technological process
Technical recipe
1. regenerated PP 100 mass parts;
2. wood powder (granularity 100-200 order) 80 mass parts;
3. chlorinatedpolyethylene 5.0 mass parts;
4. polyethylene wax 5.0 mass parts;
5. stearic acid 1.0 mass parts;
6. through nanometer grade calcium carbonate, aluminium hydroxide 4.0 mass parts (ratio 1: 1) of coupling processing;
7. dibutyl phthalate 15.0 mass parts;
8. molecular weight is 0.5～3.0 ten thousand maleic anhydride inoculated polypropylene, and its consumption is 15.0～18.0 mass parts.
With above-mentioned material pass through low speed (300～400 rev/mins) respectively, (1500～1800 change), low speed (400～500 rev/mins) thorough mixing obtain matrix material Preblend after 5～6 minutes, 25～30 minutes, 5～6 minutes at a high speed.Behind the forcing machine extruding pelletization, can obtain the injection-grade wood plastic composite PP Pipe Compound again
(2) implementation result
The performance of gained material is as follows:
Proportion 1.05
Elongation at break 3.5%
Tensile modulus 3.2GPa
Tensile strength 27.5MPa
Composite bending modulus 4.2GPa
Bending strength 34.0MPa
Non-notch Izod shock strength 162J/m
Melting index 0.8g/10min
Embodiment 2:
(1) technological process
Technical recipe
1. 100 mass parts regenerated PVC);
2. wood powder (granularity 100-200 order) 80～90 mass parts;
3. chlorinatedpolyethylene 10.0 mass parts;
4. polyethylene wax 0.5 mass parts;
5. Zinic stearas 1.0 mass parts;
6. through nanometer grade calcium carbonate, aluminium hydroxide 8.0 mass parts (ratio 3: 1) of coupling processing;
7. dioctyl phthalate (DOP) 5.0 mass parts;
8. molecular weight is 0.5～3.0 ten thousand maleic anhydride inoculated polypropylene 20.0 mass parts.
With above-mentioned material through low speed (500～600 rev/mins), (2300～2500 change), low speed (500～600 rev/mins) thorough mixing obtain matrix material Preblend after 5～6 minutes, 25～30 minutes, 5～6 minutes at a high speed.Behind the forcing machine extruding pelletization, can obtain the injection-grade wood plastic composite PP Pipe Compound again
(2) implementation result
The performance of gained material is as follows:
Proportion 1.09
Elongation at break 3.1%
Tensile modulus 3.4GPa
Tensile strength 27.2MPa
Composite bending modulus 4.5GPa
Bending strength 36.0MPa
Non-notch Izod shock strength 155J/m
Melting index 0.85g/10min
Embodiment 3:
(1) technological process
Technical recipe
1. regenerated HDPE 100 mass parts;
2. wood powder (granularity 100-200 order) 130 mass parts;
3. chlorinatedpolyethylene 5 mass parts;
4. polyethylene wax 0.5 mass parts;
5. lead stearate 5.0 mass parts;
6. through the alumina in Nano level and talcum powder 4.0 mass parts (ratio 1: 3) of coupling processing;
7. dioctyl phthalate (DOP) 15.0 mass parts;
8. maleic anhydride grafted polyethylene 5.0 mass parts of molecular weight between 0.5～3.0 ten thousand.
With above-mentioned material through low speed (400～500 rev/mins), (1700～1800 change), low speed (400～500 rev/mins) thorough mixing obtain matrix material Preblend after 5～6 minutes, 25～30 minutes, 5～6 minutes at a high speed.Behind the forcing machine extruding pelletization, can obtain the injection-grade wood plastic composite PP Pipe Compound again
(2) implementation result
The performance of gained material is as follows:
Proportion 1.09
Elongation at break 3.1%
Tensile modulus 3.4GPa
Tensile strength 27.2MPa
Composite bending modulus 4.5GPa
Bending strength 36.0MPa
Non-notch Izod shock strength 155J/m
Melting index 0.85g/10min
Claims (4)
1, a kind of injection-grade wood plastic composite is characterized in that comprising following composition:
(1) regenerated PP or HDPE or PVC 100 mass parts;
(2) granularity is 100～200 purpose wood powders, 80～130 mass parts;
(3) chlorinatedpolyethylene 5～10 mass parts;
(4) polyethylene wax 0.5～5.0 mass parts;
(5) stearic acid or its salt 1.0～5.0 mass parts;
(6) nano level toughener 4.0～8.0 mass parts;
(7) dibutyl phthalate or dioctyl ester 5.0～15.0 mass parts;
(8) PE of the maleic anhydride graft of molecular weight between 0.5～3.0 ten thousand or PP 5.0～20.0 mass parts.
2, injection-grade wood plastic composite as claimed in claim 1, it is characterized in that used nano level toughener comprise in lime carbonate, talcum powder, aluminium hydroxide, the aluminum oxide any one or multiple.
3, injection-grade wood plastic composite as claimed in claim 1 or 2 is characterized in that used nano level toughener is through silane coupling agent or titanate coupling agent processing.
4, prepare injection-grade wood plastic composite as claimed in claim 1, it is characterized in that constituent with this injection-grade wood plastic composite is by the mass parts prescription, earlier through mixing 5～10 minutes in 300～600 rev/mins of scopes of low speed, again through mixing 25～40 minutes in 1500～2500 rev/mins of scopes at a high speed, and then through mixing 5～10 minutes in 300～600 rev/mins of scopes of low speed, obtain Preblend, this Preblend behind the forcing machine extruding pelletization, is obtained injection-grade wood plastic composite.
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| CN 200710020002 CN101024709A (en) | 2007-02-06 | 2007-02-06 | Moulding-grade wood-plastic composite and processing process |
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| CN 200710020002 CN101024709A (en) | 2007-02-06 | 2007-02-06 | Moulding-grade wood-plastic composite and processing process |
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