CN103102572B - Polyolefin wood-plastic composite material and preparation method thereof - Google Patents
Polyolefin wood-plastic composite material and preparation method thereof Download PDFInfo
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- CN103102572B CN103102572B CN201310046750.8A CN201310046750A CN103102572B CN 103102572 B CN103102572 B CN 103102572B CN 201310046750 A CN201310046750 A CN 201310046750A CN 103102572 B CN103102572 B CN 103102572B
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Abstract
The invention discloses a polyolefin wood-plastic composite material. The polyolefin wood-plastic composite material is prepared by blending and extruding the following components in parts by weight: 20 to 80 parts of polyolefin resin, 20 to 80 parts of plant fiber powder, 2 to 8 parts of compatilizer, 1 to 8 parts of lubricant, and 0.1 to 1 part of antioxygen, wherein the lubricant includes pentaerythritol tetra-benzoate. The composite material has the balance torque of 3.2 to 8.4N.M, bending strength of 30.1 to 66.3MPa, and bending modulus of (0.80-22.6)*10<4>MPa. The invention also discloses a preparation method of the polyolefin wood-plastic composite material. The ester bond of the pentaerythritol tetra-benzoate contained in the wood-plastic composite material and the hydroxyl of the plant fibers can produce high hydrogen bond effect, so that the plant fibers can be promoted to be uniformly dispersed, the filling amount can be increased, the product cost is reduced, the defect on the appearance of the product is avoided, the melting and extruding efficiency is improved, and the bending performance and water absorbing performance of the material are improved; and the polyolefin wood-plastic composite material can be used as the high-level polyolefin wood-plastic composite material to be widely applied in the fields such as indoor and outdoor decoration and construction industry.
Description
Technical field
The invention belongs to wood plastic composite and preparing technical field thereof, be specifically related to a kind of polyolefin wood-plastic composite and preparation method thereof.
Background technology
As everyone knows, along with the fast development of economy and the raising of people's living standard, Wood demand is increasing, and the growth cycle of trees is very long, makes available timber fewer and feweri, and the substitute therefore finding timber becomes very urgent.
Because wood plastic composite is through high-temperature mixing by wood powder and thermoplastics; by extruding, a kind of environmental protection novel material of resources circulation made of the mode such as mold pressing; it has the sawing of timber, can dig, the excellent processing characteristics such as can to follow closely; it is the favorable substitutes of timber; therefore it is not only widely used in the fields such as building trade, furniture, automobile, gardens, public works; and also to saving natural resources, preserving the ecological environment; development green economy; walk sustainable development path, the double benefit achieving economy and environmental protection is significant.
The existing plastics being widely used in wood plastic composite have recycle polyethylene, reclaim the thermoplastic material such as polypropylene, recycle polyethylene vinyl acetate, and not only comprise wood powder for the natural fiber of wood plastic composite, also comprise old and useless newspaper, straw etc., these materials both can reduce the cost of wood plastic composite, can also improve physical and mechanical properties such as hardness, the tensile property etc. of matrix material.
The complete processing of wood plastic composite is extruded, injection moulding etc., extruding with in Shooting Technique, because the addition of natural fiber is very large, usually more than 50%, even up to 65%(Michael Roth et. al. Journal of Analytical and Applied Pyrolysis. 2007, 79:306 – 312. Wang Le is raw, Deng. New Building Materials, 2010(7): 86 – 88.), make wood plastic composite when forming process, there is the intermolecular friction of molten polymer and the friction between polymer melt and processing units surface, the former can increase the melt-flow viscosity of polymkeric substance, reduce its mobility, the overheated of material can be caused time serious, aging, latter makes to adhere between polymer melt and processing units and other contact material surfaces, and raise with temperature, frictional coefficient enlarges markedly.The acting in conjunction of these two factors can make wood plastic composite high temperature extrude with injection moulding process in easily there is polymer degradation, wood powder burns, products surface quality is poor, the problem such as even cannot to process.In order to address these problems, the measure that prior art adopts adds lubricant or lubricating system wherein.Really appropriate lubricant or lubricating system not only can improve quality of item, output can also be improved, reduce the production cost of product, but inappropriate lubricant or lubricating system not only do not reach corresponding effect, the extrusion of material also can be made unstable, product appearance produces the defect such as shark skin, edge sawtooth, even make the defects such as injection moulding becomes difficulty, mold filling is imperfect, product surface is rough.Therefore, proper lubrication formula is selected just to become the key of win or lose in wood plastic composite processing.
At present, conventional in wood plastic composite lubricant or lubricating system (Tang Weijia, Ding Jiansheng, Wood plastic composite lubricant and coupling agent technical progress. world's plastics, 2006,24(11): 78-83.) there is calcium stearate, Magnesium Stearate, stearic acid, paraffin, polyester wax, Poly Propylene Wax, the fatty acid ester of bisamide, the fatty acid ester of tetramethylolmethane, fatty acid ester of glycerine and composition thereof etc., and Zinic stearas and N, N
,the mixture of ethylene bis stearic acid amide (EBS).
But people in use find that Zinic stearas-EBS lubricating system has with the system employing maleic anhydride stem grafting polyolefin compatilizer to conflict, cause not only to reduce coupling effect widely, also can reduce the mechanical property of polyolefin wood-plastic composite, as flexural strength, modulus in flexure etc. simultaneously.For this reason, U.S. Patent No. 7,731,880 disclose using EBS separately as the lubricant of wood plastic composite or with EBS and float stone, the composite compounded lubricant as wood plastic composite of talcum powder, although the performance of the polyolefin wood-plastic composite obtained is better than Zinic stearas-EBS oiling system, make bending property and water absorbing properties be obtained for improvement, its flexural strength improve only 10%, water absorbing properties also only has the improvement of percentum, and improvement effect is very limited.
Summary of the invention
The present invention seeks to, for prior art Problems existing, first to provide a kind of polyolefin wood-plastic composite, its bending property and water absorbing properties are all better than existing polyolefin wood-plastic composite.
Another object of the present invention is to provide a kind of preparation method of said polyolefins wood plastic composite.
Polyolefin wood-plastic composite provided by the invention, is characterized in that this wood plastic composite is extruded by following component blend to form by weight:
Compatilizer contained in above wood plastic composite is the one in maleic anhydride grafted polyethylene (PE-g-MAH) and maleic anhydride inoculated polypropylene (PP-g-MAH), contained lubricant is pentaerythritol tetrabenzoate or pentaerythritol tetrabenzoate and ethylene bis stearic acid amide, the two amine hydroxybenzene of ethylene, pentaerythritol stearate, PETO, glyceryl alcohol stearate, glyceryl alcohol oleic acid ester, tetramethylolmethane hexanodioic acid stearate, paraffin, polyester wax, polyethylene wax, Poly Propylene Wax, any one mixture formed in polyethylene glycol stearate or stearic acid, the weight ratio of the two is 1:0.1 ~ 1, preferred 1:0.5 ~ 1, wherein preferred pentaerythritol tetrabenzoate, pentaerythritol tetrabenzoate and ethylene bis stearic acid amide, pentaerythritol stearate, stearic acid, polyethylene wax, the mixture of Poly Propylene Wax.
Above wood plastic composite is preferred by following component blend extrusion moulding by weight:
Polyolefin resin contained in above wood plastic composite is the one in polyethylene, polypropylene and ethylene-vinyl acetate copolymer, and it both can use virgin material, also can use the waste material reclaimed, in order to reduce costs and environmental protection, and the waste material preferably reclaimed.
One in the powder that vegetable fibre powder contained in above wood plastic composite is wood powder, bamboo powder, chaff powder, straw powder and other agriculture and forestry organic waste material are made.
Oxidation inhibitor contained in above wood plastic composite is the mixture that antioxidant 1010 and irgasfos 168 form.
The preparation method of said polyolefins wood plastic composite provided by the invention, processing step and the condition of this preparation method are as follows:
First by polyolefin resin 20 ~ 80 parts, to be dried to that water content is less than 20 ~ 80 parts, 1% vegetable fibre powder, compatilizer 2 ~ 8 parts, lubricant 1 ~ 8 part, 0.1 ~ 1 part, oxidation inhibitor adds premix in high-speed mixer even, then Preblend is placed in twin screw extruder, in temperature 160 ~ 190 DEG C of extruding pelletizations, again the pellet made is placed in twin screw extruder, at continuing at temperature 160 ~ 190 DEG C, namely extrusion moulding obtains polyolefin wood-plastic composite.
Compatilizer wherein used is the one in maleic anhydride grafted polyethylene and maleic anhydride inoculated polypropylene, lubricant used is pentaerythritol tetrabenzoate or pentaerythritol tetrabenzoate and ethylene bis stearic acid amide, the two amine hydroxybenzene of ethylene, pentaerythritol stearate, PETO, glyceryl alcohol stearate, glyceryl alcohol oleic acid ester, tetramethylolmethane hexanodioic acid stearate, paraffin, polyester wax, polyethylene wax, Poly Propylene Wax, any one mixture formed in polyethylene glycol stearate or stearic acid, the weight ratio of the two is 1:0.1 ~ 1, preferred 1:0.5 ~ 1, wherein preferred pentaerythritol tetrabenzoate, pentaerythritol tetrabenzoate and ethylene bis stearic acid amide, pentaerythritol stearate, stearic acid, polyethylene wax, the mixture of Poly Propylene Wax.
In above preparation method, the number of each material is preferably by weight: polyolefin resin 30 ~ 70 parts, 30 ~ 70 parts, vegetable fibre powder, compatilizer 3 ~ 6 parts, lubricant 3 ~ 6 parts, 0.1 ~ 1 part, oxidation inhibitor.
Polyolefin resin used in above preparation method is the one in polyethylene, polypropylene and ethylene-vinyl acetate copolymer, and it both can use virgin material, also can use the waste material reclaimed, in order to reduce costs and environmental protection, and the waste material preferably reclaimed.
Vegetable fibre powder used in above preparation method is one, preferred wood powder and bamboo powder in wood powder, bamboo powder, chaff powder, straw powder and other agriculture and forestry organic waste material powder.
Oxidation inhibitor used in above preparation method is the mixture that antioxidant 1010 and irgasfos 168 form.
The present invention compared with prior art, has the following advantages:
1, water insoluble owing to containing in polyolefin wood-plastic composite provided by the invention, be insoluble in again aliphatic hydrocarbon and aromatic hydrocarbon solvent, and resistant to elevated temperatures pentaerythritol tetrabenzoate, the ester bond of this product and the hydroxyl of vegetable fibre can produce very strong hydrogen bond action, good to the wetting property of vegetable fibre, thus can promote dispersed in polyolefin resin of vegetable fibre, greatly increase the loading level of vegetable fibre, reduce product cost; In addition because lubricant ester bond can produce hydrogen bond action with vegetable fibre, and the nonpolar alkyl of lubricant can be well compatible with polyolefine, thus the consistency of wood powder and polyolefin resin can be improved, make in the course of processing, vegetable fibre can be completely coated by polyolefin resin, reduce the friction resistance that vegetable fibre brings, avoid product appearance to occur the defects such as shark skin, edge sawtooth, mold filling are imperfect, product surface is rough.
2, because the present invention also can at the good novel lubricant of lubricity---on pentaerythritol tetrabenzoate basis, the lubricant of collocation routine forms composite lubricated system, thus not only better lubricant effect can be obtained, improve and melt extrude efficiency and goods output, and dispersion effect is good, significantly improve bending property and the water absorbing properties of polyolefin wood-plastic composite, can be used as high-grade polyolefin wood-plastic composite, substitute timber and widely use in the field such as indoor and outdoor decoration, construction industry.
3, because the present invention adopts pentaerythritol tetrabenzoate less as the balancing torque of the wood plastic composite of lubricant gained, thus can reduce the energy consumption of system significantly, enhance productivity.
4, preparation method of the present invention is simple, technical maturity, and energy consumption is low, is easy to grasp promote.
Embodiment
Below by embodiment, the present invention is specifically described; what be necessary to herein means out is that the present embodiment is only used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
What deserves to be explained is, 1) number of following examples and comparative example material used is weight part; 2) rheology processability of following examples and comparative example gained wood plastic composite evaluates with the balancing torque of torque rheometer 190 DEG C of tests; The flexural strength of material and modulus in flexure are tested according to GB/T 9341-2008 sample preparation; Water absorbing properties is that the sample of 100mm × 10mm × 2mm is at room temperature soaked 24 hours, and its surface is dried by taking-up filter paper and the percentage ratio testing its water suction characterizes.
Embodiment 1
First by reclaiming acrylic resin 80 parts, being dried to particle diameter that water content is less than 1%, to be that mixture 0.1 part that 30 20 parts, object bamboo powder, maleic anhydride inoculated polypropylene 2 parts, pentaerythritol tetrabenzoate 1 part, antioxidant 1010 and irgasfos 168 form adds premix in high-speed mixer even, then Preblend is placed in twin screw extruder, in temperature 160 ~ 190 DEG C of extruding pelletizations, again the pellet made is placed in twin screw extruder, at continuing at temperature 160 ~ 190 DEG C, namely extrusion moulding obtains polyolefin wood-plastic composite.
The average torque of gained wood plastic composite is 3.2N.M, and flexural strength is 30.1MPa, and modulus in flexure is 0.99 × 10
4mPa, water-intake rate is 1.62%.
Embodiment 2
The present embodiment material used is: reclaim acrylic resin 33.5 parts, be dried to the mixture 0.5 part that the particle diameter that water content is less than 1% is 40 object wood powder 60 parts, maleic anhydride inoculated polypropylene 2 parts, pentaerythritol tetrabenzoate 4 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 3.4N.M, and flexural strength is 36.6MPa, and modulus in flexure is 1.32 × 10
4mPa, water-intake rate is 1.53%.
Embodiment 3
The present embodiment material used is: reclaiming acrylic resin 33.5 parts, being dried to the particle diameter that water content is less than 1% is 60 object wood powder 60 parts, maleic anhydride inoculated polypropylene 3 parts, pentaerythritol tetrabenzoate 2 parts, pentaerythritol stearate 1 part, the mixture that antioxidant 1010 and irgasfos 168 form 0.5 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 4.7N.M, and flexural strength is 36.6MPa, and modulus in flexure is 1.26 × 10
4mPa, water-intake rate is 4.3%.
Embodiment 4
The present embodiment material used is: reclaiming acrylic resin 33.5 parts, being dried to the particle diameter that water content is less than 1% is 80 object wood powder 70 parts, maleic anhydride inoculated polypropylene 2 parts, pentaerythritol tetrabenzoate 1.5 parts, ethylene bis stearic acid amide 1.05 parts, the mixture that antioxidant 1010 and irgasfos 168 form 0.6 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 4.6N.M, and flexural strength is 33.9MPa, and modulus in flexure is 1.09 × 10
4mPa, water-intake rate is 3.2%.
Embodiment 5
The present embodiment material used is: reclaiming acrylic resin 70 parts, being dried to the particle diameter that water content is less than 1% is 100 object wood powder 30 parts, maleic anhydride inoculated polypropylene 2 parts, pentaerythritol tetrabenzoate 2 parts, stearic acid 0.2 part, the mixture that antioxidant 1010 and irgasfos 168 form 0.5 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 4.4N.M, and flexural strength is 38.3MPa, and modulus in flexure is 1.29 × 10
4mPa, water-intake rate is 3.4%.
Embodiment 6
The present embodiment material used is: reclaiming acrylic resin 35.5 parts, being dried to the particle diameter that water content is less than 1% is 80 object wood powder 60 parts, maleic anhydride inoculated polypropylene 4 parts, pentaerythritol tetrabenzoate 2 parts, Zinic stearas 2 parts, the mixture that antioxidant 1010 and irgasfos 168 form 0.5 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 4.1N.M, and flexural strength is 38.9MPa, and modulus in flexure is 0.89 × 10
4mPa, water-intake rate is 2.3%.
Embodiment 7
The present embodiment material used is: acrylic resin virgin material 40 parts, be dried to the mixture 1.0 parts that the particle diameter that water content is less than 1% is 100 object wood powder 80 parts, maleic anhydride inoculated polypropylene 4 parts, pentaerythritol tetrabenzoate 6 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 8.4N.M, and flexural strength is 55.0MPa, and modulus in flexure is 2.26 × 10
4mPa, water-intake rate is 1.56%.
Embodiment 8
The present embodiment material used is: acrylic resin virgin material 20 parts, to be dried to the particle diameter that water content is less than 1% be 80 80 parts, object bamboo powder, maleic anhydride inoculated polypropylene 8 parts, pentaerythritol tetrabenzoate 4 parts, ethylene bis stearic acid amide 2.4 parts, the mixture that antioxidant 1010 and irgasfos 168 form 0.5 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 8.1N.M, and flexural strength is 66.3MPa, and modulus in flexure is 2.14 × 10
4mPa, water-intake rate is 1.54%.
Embodiment 9
The present embodiment material used is: acrylic resin virgin material 30.0 parts, to be dried to the particle diameter that water content is less than 1% be 60 object straw powder 70 parts, maleic anhydride inoculated polypropylene 6 parts, pentaerythritol tetrabenzoate 3 parts, pentaerythritol stearate 2.4 parts, the mixture that antioxidant 1010 and irgasfos 168 form 0.8 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 7.8N.M, and flexural strength is 49.0MPa, and modulus in flexure is 1.82 × 10
4mPa, water-intake rate is 5.2%.
Embodiment 10
The present embodiment material used is: high density poly propylene resin virgin material 33.5 parts, be dried to the mixture 0.5 part that the particle diameter that water content is less than 1% is 50 object wood powder 60 parts, maleic anhydride graft high density poly propylene 2 parts, pentaerythritol tetrabenzoate 5 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.9N.M, and flexural strength is 50.5MPa, and modulus in flexure is 2.06 × 10
4mPa, water-intake rate is 1.61%.
Embodiment 11
The present embodiment material used is: high-density polyethylene resin virgin material 40 parts, to be dried to the particle diameter that water content is less than 1% be 70 object wood powder 50 parts, maleic anhydride graft high density polyethylene(HDPE) 3 parts, pentaerythritol tetrabenzoate 2 parts, ethylene bis stearic acid amide 2 parts, the mixture that antioxidant 1010 and irgasfos 168 form 0.5 part, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.5N.M, and flexural strength is 41.2MPa, and modulus in flexure is 1.64 × 10
4mPa, water-intake rate is 3.6%.
Embodiment 12
The present embodiment material used is: high-density polyethylene resin virgin material 50 parts, be dried to the mixture 0.5 part that the particle diameter that water content is less than 1% is 80 object wood powder 50 parts, maleic anhydride graft high density polyethylene(HDPE) 2 parts, pentaerythritol tetrabenzoate 1 part, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 5.8N.M, and flexural strength is 49.9MPa, and modulus in flexure is 2.10 × 10
4mPa, water-intake rate is 3.2%.
Embodiment 13
The present embodiment material used is: Recycled HDPE resin 20 parts, be dried to the mixture 0.8 part that the particle diameter that water content is less than 1% is 90 object wood powder 80 parts, maleic anhydride graft high density polyethylene(HDPE) 4 parts, pentaerythritol tetrabenzoate 4 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.6N.M, and flexural strength is 59.3MPa, and modulus in flexure is 2.10 × 10
4mPa, water-intake rate is 2.1%.
Embodiment 14
The present embodiment material used is: Recycled HDPE resin 33.5 parts, to be dried to the particle diameter that water content is less than 1% be the mixture 0.6 part that 90 70 parts, object bamboo powder, maleic anhydride graft high density polyethylene(HDPE) 6 parts, pentaerythritol tetrabenzoate 3 parts, ethylene bis stearic acid amide 1.2 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.2N.M, and flexural strength is 50.9MPa, and modulus in flexure is 1.68 × 10
4mPa, water-intake rate is 4.2%.
Embodiment 15
The present embodiment material used is: Recycled HDPE resin 30.0 parts, be dried to the mixture 0.6 part that the particle diameter that water content is less than 1% is 80 object wood powder 70 parts, maleic anhydride graft high density polyethylene(HDPE) 8 parts, pentaerythritol tetrabenzoate 4 parts, pentaerythritol stearate 4 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.3N.M, and flexural strength is 55.8MPa, and modulus in flexure is 1.98 × 10
4mPa, water-intake rate is 2.3%.
Embodiment 16
The present embodiment material used is: Recycled HDPE resin 40.0 parts, to be dried to the particle diameter that water content is less than 1% be the mixture 0.7 part that 100 60 parts, object bamboo powder, maleic anhydride graft high density polyethylene(HDPE) 5 parts, pentaerythritol tetrabenzoate 2.5 parts, stearic acid 2 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 3.7N.M, and flexural strength is 29.2MPa, and modulus in flexure is 1.92 × 10
4mPa, water-intake rate is 2.35%.
Embodiment 17
The present embodiment material used is: Recycled HDPE resin 20.0 parts, be dried to the mixture 1.0 parts that the particle diameter that water content is less than 1% is 50 object wood powder 70 parts, maleic anhydride graft high density polyethylene(HDPE) 6 parts, pentaerythritol tetrabenzoate 3 parts, polyethylene wax 3 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 4.0N.M, and flexural strength is 34.7MPa, and modulus in flexure is 1.14 × 10
4mPa, water-intake rate is 2.4%.
Embodiment 18
The present embodiment material used is: Recycled HDPE resin 30.0 parts, to be dried to the particle diameter that water content is less than 1% be the mixture 0.8 part that 40 70 parts, object bamboo powder, maleic anhydride graft high density polyethylene(HDPE) 4 parts, pentaerythritol tetrabenzoate 3 parts, Poly Propylene Wax 2 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with embodiment 1 with condition, slightly.
The average torque of gained wood plastic composite is 3.8N.M, and flexural strength is 37.7MPa, and modulus in flexure is 1.21 × 10
4mPa, water-intake rate is 2.45%.
Comparative example 1
First by reclaiming acrylic resin 33.5 parts, being dried to the particle diameter that water content is less than 1% is 80 object wood powder 60 parts, maleic anhydride inoculated polypropylene 2 parts, ethylene bis stearic acid amide 4 parts, antioxidant 1010 and irgasfos 168 form mixture 0.5 part, to add premix in high-speed mixer even, then Preblend is placed in twin screw extruder, in temperature 160 ~ 190 DEG C of extruding pelletizations, again the pellet made is placed in twin screw extruder, at continuing at temperature 160 ~ 190 DEG C, namely extrusion moulding obtains polyolefin wood-plastic composite.
The average torque of gained wood plastic composite is 4.8N.M, and flexural strength is 27.7MPa, and modulus in flexure is 0.80 × 10
4mPa, water-intake rate is 5.9%.
Comparative example 2
The present embodiment material used is: reclaim acrylic resin 35.5 parts, be dried to the mixture 0.5 part that the particle diameter that water content is less than 1% is 80 object wood powder 60 parts, maleic anhydride inoculated polypropylene 2 parts, ethylene bis stearic acid amide 2 parts, Zinic stearas 2 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with comparative example 1 with condition, slightly.
The average torque of gained wood plastic composite is 4.7N.M, and flexural strength is 28.9MPa, and modulus in flexure is 0.81 × 10
4mPa, water-intake rate is 9.1%.
Comparative example 3
The present embodiment material used is: Recycled HDPE resin 33.5 parts, to be dried to the particle diameter that water content is less than 1% be the mixture 0.5 part that 80 60 parts, object bamboo powder, maleic anhydride graft high density polyethylene(HDPE) 2 parts, ethylene bis stearic acid amide 2 parts, Zinic stearas 2 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with comparative example 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.7N.M, and flexural strength is 41.0MPa, and modulus in flexure is 1.38 × 10
4mPa, water-intake rate is 5.72%.
Comparative example 4
The present embodiment material used is: Recycled HDPE resin 23.5 parts, be dried to the mixture 0.5 part that the particle diameter that water content is less than 1% is 80 object wood powder 70 parts, maleic anhydride graft high density polyethylene(HDPE) 2 parts, ethylene bis stearic acid amide 2 parts, Zinic stearas 2 parts, antioxidant 1010 and irgasfos 168 form, all the other processing steps are identical with comparative example 1 with condition, slightly.
The average torque of gained wood plastic composite is 6.8N.M, and flexural strength is 27.6MPa, and modulus in flexure is 0.82 × 10
4mPa, water-intake rate is 3.2%.
Claims (10)
1. a polyolefin wood-plastic composite, this wood plastic composite is extruded by following component blend to form by weight:
Compatilizer contained by it is maleic anhydride grafted polyethylene or maleic anhydride inoculated polypropylene, contained lubricant is pentaerythritol tetrabenzoate or pentaerythritol tetrabenzoate and ethylene bis stearic acid amide, the two amine hydroxybenzene of ethylene, pentaerythritol stearate, PETO, glyceryl alcohol stearate, glyceryl alcohol oleic acid ester, tetramethylolmethane hexanodioic acid stearate, paraffin, polyester wax, polyethylene wax, Poly Propylene Wax, any one mixture formed in polyethylene glycol stearate or stearic acid, the weight ratio of the two is 1:0.1 ~ 1, the balancing torque of this matrix material is 3.2 ~ 8.4N.M, flexural strength is 30.1 ~ 66.3MPa, modulus in flexure is 0.89 ~ 22.6 × 10
4mPa.
2. polyolefin wood-plastic composite as claimed in claim 1, this wood plastic composite is extruded by following component blend to form by weight:
3. polyolefin wood-plastic composite as claimed in claim 1 or 2, polyolefin resin contained in this wood plastic composite is any one in polyethylene, polypropylene or ethylene-vinyl acetate copolymer.
4. polyolefin wood-plastic composite as claimed in claim 1 or 2, vegetable fibre powder contained in this wood plastic composite is any one in wood powder, bamboo powder, chaff powder, straw powder or other agriculture and forestry organic waste material powder, and its median size is 30 ~ 100 orders.
5. polyolefin wood-plastic composite as claimed in claim 3, vegetable fibre powder contained in this wood plastic composite is any one in wood powder, bamboo powder, chaff powder, straw powder or other agriculture and forestry organic waste material powder, and its median size is 30 ~ 100 orders.
6. a preparation method for polyolefin wood-plastic composite according to claim 1, processing step and the condition of this preparation method are as follows:
First by polyolefin resin 20 ~ 80 parts, to be dried to that water content is less than 20 ~ 80 parts, 1% vegetable fibre powder, compatilizer 2 ~ 8 parts, lubricant 1 ~ 8 part, 0.1 ~ 1 part, oxidation inhibitor adds premix in high-speed mixer even, then Preblend is placed in twin screw extruder, in temperature 160 ~ 190 DEG C of extruding pelletizations, again the pellet made is placed in twin screw extruder, at continuing at temperature 160 ~ 190 DEG C, namely extrusion moulding obtains polyolefin wood-plastic composite
Compatilizer wherein used is the one in maleic anhydride grafted polyethylene and maleic anhydride inoculated polypropylene; Lubricant used is pentaerythritol tetrabenzoate or pentaerythritol tetrabenzoate and ethylene bis stearic acid amide, any one mixture formed in ethylene two amine hydroxybenzene, pentaerythritol stearate, PETO, glyceryl alcohol stearate, glyceryl alcohol oleic acid ester, tetramethylolmethane hexanodioic acid stearate, paraffin, polyester wax, polyethylene wax, Poly Propylene Wax, polyethylene glycol stearate or stearic acid, and the weight ratio of the two is 1:0.1 ~ 1.
7. the preparation method of polyolefin wood-plastic composite as claimed in claim 6, in this preparation method, the number of each material is by weight: polyolefin resin 30 ~ 70 parts, 30 ~ 70 parts, vegetable fibre powder, compatilizer 3 ~ 6 parts, lubricant 3 ~ 6 parts, 0.1 ~ 1 part, oxidation inhibitor.
8. the preparation method of polyolefin wood-plastic composite as claimed in claims 6 or 7, polyolefin resin used in this preparation method is any one in polyethylene, polypropylene or ethylene-vinyl acetate copolymer.
9. the preparation method of polyolefin wood-plastic composite as claimed in claims 6 or 7, vegetable fibre powder used in this preparation method is any one in wood powder, bamboo powder, chaff powder, straw powder or other agriculture and forestry organic waste material powder, and its median size is 30 ~ 100 orders.
10. the preparation method of polyolefin wood-plastic composite as claimed in claim 8, vegetable fibre powder used in this preparation method is any one in wood powder, bamboo powder, chaff powder, straw powder or other agriculture and forestry organic waste material powder, and its median size is 30 ~ 100 orders.
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