CN101982488B - Wood plastic composite and preparation method thereof - Google Patents
Wood plastic composite and preparation method thereof Download PDFInfo
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- CN101982488B CN101982488B CN201010515352A CN201010515352A CN101982488B CN 101982488 B CN101982488 B CN 101982488B CN 201010515352 A CN201010515352 A CN 201010515352A CN 201010515352 A CN201010515352 A CN 201010515352A CN 101982488 B CN101982488 B CN 101982488B
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Abstract
The invention discloses a wood plastic composite and a preparation method thereof. The composite is characterized by being prepared by the method comprising the following steps: taking 20-80g/m<2> of needle fabric as a reinforcing material and 100 parts of thermoplastic high polymer and 10-60 parts by weight of wood flour in parts as matrixes, and then compounding the three compounds, wherein the thermoplastic high polymer is polyethylene, polypropylene, polrvinyl chloride (PVC) or polystyrene; and the grain size of the wood flour is 20-300 meshes. The preparation method comprises the following steps: evenly mixing the thermoplastic high polymer with the wood flour in a screw extruder; melting the mixture; extruding the melted mixture in a die on which the needle fabric is laid in advance; and carrying out compression moulding forming to obtain the wood plastic composite.
Description
Technical field
The present invention relates to composite technology, be specially a kind of with non-woven as wood plastic composite of strongthener and preparation method thereof.
Background technology
It is to strengthen body with the ligno-cellulosic materials that wood plastic composite (WPC) is one type, is matrix with the thermoplastic plastic, through the type material that is composited.It combines matrix and the double dominant that strengthens two kinds of materials of body, and it is better relatively to have mechanical property, and resistance to impact shock is higher, and is water-fast, moisture resistance, wear-resisting, resistance to chemical attack, characteristics such as dimensional stability is good.Wood plastic composite is huge in aspect demands such as building and finishing material, communications and transportation, garden landscape, furniture.But existing wood plastic composite exists density bigger than normal, the defective of shock resistance difference.
Reported that the two-layer crystal whisker modified plastic layer of a kind of employing, vegetable fibre reinforced plastic layer prepare a kind of surface flame-retardant wood-plastic composite material plate and preparation method thereof for Chinese patent CN101486267 number, wherein the vegetable fibre reinforced plastic layer is formed by plastic pellet, vegetable fibre mixing calendering.Then utilize carbon-carbon double bond and siloyl group and the polyolefine and the wood powder formation chemical bond of modification of aramid fiber surface for Chinese patent CN101629022 number; Make aramid fiber and polyolefine have good consistency, strengthened the interface binding power of matrix material effectively, make aramid fiber enhanced wood-plastic composite material have HS and H.T. simultaneously; Comprehensive mechanical property is good; But the modification of aramid fiber price is higher, has increased production cost accordingly, is unfavorable for popularizing using.Disclose a kind of fibrous magnesium silicate enhanced thermoplastic base wood and plastic composite material and preparation method thereof Chinese patent CN101724190A number, it adopts fibrous magnesium silicate to strengthen wood plastic composite, has obtained certain effect.
No matter above-mentioned patent is that vegetable fibre strengthens, modification of aramid fiber strengthens, or fibrous magnesium silicate strengthens, and what all adopt is staple fibre, and adopts the mode of blend to prepare Preblend earlier, prepares wood plastic composite then.Though these methods have certain reinforced effects, but because the strongthener that is adopted is a staple fibre, and fiber distribution in a jumble in matrix plastic, and inhomogeneous, make actual reinforced effects not reach ideal value.
Summary of the invention
To the deficiency of prior art, the technical problem that quasi-solution of the present invention is determined is, a kind of wood plastic composite and preparation method thereof is provided, and this matrix material as strongthener, has characteristics such as low density, HS, shock resistance, cost be low with non-woven; It is simple that this preparation method has technology, is suitable for characteristics such as industrial applications.
The technical scheme that the present invention solves said composite technology problem is, designs a kind of wood plastic composite, it is characterized in that this matrix material is 20～80g/m with grammes per square metre
2Needle fabric as strongthener, serve as to form matrix with the wood powder of the thermoplastic high polymer that comprises 100 weight parts and 10～60 weight parts, process through compound; Described thermoplastic high polymer is Vilaterm, Vestolen PP 7052, SE or PS; Described wood powder particle diameter is 20～300 orders.
The technical scheme that the present invention solves said preparing method's technical problem is; Design a kind of preparation method of wood plastic composite, this preparation method adopts wood plastic composite of the present invention to form, and earlier described thermoplastic high polymer and wood powder is mixed in single screw extrusion machine; After the fusion; Be expressed in the mould that is equipped with said needle fabric in advance, pass through compression molding again, promptly make said with the wood plastic composite of non-woven as strongthener.
Compared with prior art; Wood plastic composite of the present invention with needle fabric as strengthening body; Because needle fabric has three-dimensional net structure, entwines each other, colludes with between fiber and the fiber, its intensity is far longer than filamentary intensity; Therefore wood plastic composite of the present invention not only has high-strength characteristics, and has the advantage of high impact resistance.Test shows: the tensile strength of matrix material of the present invention can reach 96MPa, and flexural strength can reach 81.4MPa, and shock strength can reach 46KJ/m
2(referring to embodiment).Preparing method of the present invention is owing to adopt needle fabric as strengthening body; Entwine each other between the fiber, collude with; Its intensity is much larger than the intensity of bulk fibre; Because needle fabric has three-dimensional net structure, therefore make the non-woven enhancing wood plastic composite of preparation have the characteristics of HS, high impact resistance simultaneously.In addition, preparation method of the present invention has adopted azo foaming agent, makes prepared non-woven strengthen wood plastic composite and has low-density characteristics again.
Embodiment
Further narrate the present invention below in conjunction with embodiment.
The wood plastic composite (abbreviation matrix material) of the present invention's design is characterized in that this matrix material is 20～80g/m with grammes per square metre
2Needle fabric as strongthener, serve as to form matrix with the wood powder of the thermoplastic high polymer that comprises 100 weight parts and 10～60 weight parts, process through compound; Described thermoplastic high polymer is Vilaterm, Vestolen PP 7052, SE or PS; Said wood powder particle diameter is 20～300 orders.
The present invention has designed the preparation method (abbreviation preparation method) of wood plastic composite simultaneously.This preparation method adopts wood plastic composite of the present invention to form; Earlier described thermoplastic high polymer and wood powder are mixed in single screw extrusion machine; After the fusion; Be expressed in the mould that is equipped with said needle fabric in advance, pass through compression molding again, promptly make said with the wood plastic composite of non-woven as strongthener.
The strongthener grammes per square metre of matrix material of the present invention is 20～80g/m
2, less than 20g/m
2Strongthener because its grammes per square metre is too small, make the homogeneity of needle fabric product of low grammes per square metre have defective, its reinforced effects is not good, should not adopt, and greater than 80g/m
2Though itself excellent strength of needle fabric; But because grammes per square metre is excessive relatively; Density is excessive; Make when the preparation needle fabric strengthens wood plastic composite that wood is moulded Preblend to needle fabric internal penetration difficulty, and finally causes needle fabric to strengthen the whole mechanical properties decrease of wood plastic composite; Adopt the needle fabric of big grammes per square metre also to increase cost simultaneously, so grammes per square metre is greater than 80g/m
2Needle fabric also should not adopt.
The effect that why strongthener of the present invention is selected needle fabric and do not selected the reason of other types non-woven is needle fabric through pricker makes the fiber in the needle fabric entwine each other, collude with; Make the non-woven of other type of strength ratio of needle fabric want big; Simultaneously because needle fabric is three network structures; Make wood mould that Preblend can be carried out well flowing, infiltration in needle fabric, for the preparation of the wood plastic composite of excellent performance is laid a good foundation.For the needle fabric that is suitable for grammes per square metre, optimization polypropylene fiber needle spunlaced nonwoven of the present invention, trevira needle fabric, nylon needle fabric or flaxen fiber needle fabric.
The further characteristic of matrix material of the present invention is that described thermoplastic high polymer is Vilaterm, Vestolen PP 7052, SE or the PS that reclaims or abandon.The present invention adopts the thermoplastic high polymer that reclaims or abandon both to reduce production cost, practiced thrift resource, and is environmental, also do not influence product quality and performances.
When preparation method of the present invention adopts needle fabric to do strongthener; Its adding method is that the needle fabric with said grammes per square metre is laid in the mould according to design requirements in advance; Then the matrix compound directly is expressed in the mould that is equipped with needle fabric, and then compression molding.The enhanced process of matrix material of the present invention designs, and can promote the mechanical property of matrix material significantly, and not only reinforced effects is obvious; Shock resistance improves; Can save simultaneously expensive coupling agent (referring to Chinese patent CN101486267) again, make technology simple, cost descends.
The further characteristic of matrix material of the present invention is the azodicarbonamide foaming agent that in matrix material is formed, is added with 5～15 weight parts.The addition means of said whipping agent is to join in the single screw extrusion machine simultaneously with described thermoplastics type's multipolymer, wood powder; After mixing, the fusion; Be expressed in the mould that is equipped with needle fabric in advance, pass through compression molding again, promptly make said non-woven enhanced wood plastic composite.After adding azodicarbonamide foaming agent during matrix material is formed, can make and contain a large amount of micropores in the prepared composite material, reach low-density effect.
The defective that wood plastic composite ubiquity resistance to impact shock is low, product density is bigger than normal of producing at present, product density is that the twice of common wood is many, too high density not only makes its application scenario be restricted, and has also increased production cost.It is whipping agent with the Cellmic C 121 that non-woven of the present invention strengthens wood plastic composite, its good dispersivity in matrix, narrower, the easy control of decomposition temperature, decompose the gas that produces do not fire, nontoxic, can not explode, be difficult for liquefaction, rate of diffusion is low; And use maximum whipping agents now is oil ethers and halogenated hydrocarbon material, and the oil ether material has combustibility, and the halogenated hydrocarbon material is poisonous, fluoro aliphatic hydrocarbon especially, and it decomposes the fluorochemical that produces can destroy the peripheral ozonosphere of the earth.Test shows that composite products density of the present invention can reduce by 30～40% than conventional composite products; Simultaneously; The foam structure special because of material can produce the sound-insulating effect; Add the enhancement of needle fabric, can effectively stop the slight crack expansion, and improve the ductility and the impact resistance of product.
Matrix material of the present invention not only has the double dominant of timber and plastics, and the enhancement process through needle fabric, has given the function of product HS, high impact resistance, has improved added value of product.The particularly integrated use of needle fabric and whipping agent makes comprehensive mechanical performance obtain improving greatly and improving, and makes product density be able to reduction by a relatively large margin.Therefore; Product of the present invention has more wide applications than common fiber reinforcement wood plastic composite; Particularly in the place of high request, high added value; Like the top ceiling in high-grade hotel, hotel, floor, sound isolating decorative plate and high-grade furniture and desk etc., in addition, also can be used on high-grade automobile, the pallet and the first-class place of freight container of particular requirement are arranged.
The present invention does not address part and is applicable to prior art.
Provide specific embodiment of the present invention below, the claim protection domain of application of the present invention does not receive the restriction of these specific embodiments.
Embodiment 1
Matrix material described in the present embodiment is that 20 purpose wood powders, 5 parts of azodicarbonamide foaming agents constitute by 100 parts of Vilaterm, 10 parts of particle diameters by weight, and after single screw extrusion machine mixing, fusion, being injected into and being equipped with grammes per square metre in advance is 20g/m
2The mould of polypropylene fibre needle fabric in, promptly get through compression molding again.
The concrete steps of Composite Preparation are: the blowing-type baking oven is put into wood powder in (1), and temperature is made as 100 ℃, and baking to its water ratio is lower than 1%; (2) in mould, laying grammes per square metre according to designing requirement is 20g/m
2The polypropylene fibre needle fabric; (3) be that 10 parts of wood powders of 20 purposes, 5 parts of Cellmic C 121s are after single screw extrusion machine mixing, fusion with 100 parts of Vilaterm, particle diameter; Be injected in the mould that is equipped with the polypropylene fibre needle fabric in advance; Compression molding promptly obtains described matrix material.
Through test, the tensile strength of this matrix material is 85MPa, and flexural strength is 72.5MPa, and shock strength is 38KJ/m
2, density is 0.68g/cm
3
The comparative example 1
The raw material of cellulose materials reinforced plastics composite material by adopting has only wood powder and two kinds of raw materials of Vilaterm in the present embodiment, and weight part is identical with embodiment 1.The concrete steps of Composite Preparation are: the blowing-type baking oven is put into wood powder in (1), and temperature is made as 100 ℃, and baking to its water ratio is lower than 1%; (2) be after 10 parts of wood powders of 20 purposes join fusion in the single screw extrusion machine, mixing, to be injected in the mould with 100 parts of Vilaterm, particle diameter, compression molding promptly obtains described wood plastic composite.
Through test, the tensile strength of this matrix material is 41.3MPa, and flexural strength is 37MPa, and shock strength is 9.7KJ/m
2, density is 0.94g/cm
3
Can find out that through contrast tensile strength, flexural strength, shock strength and the density of matrix material of the present invention (embodiment 1) is respectively 2.06 times, 1.96 times, 3.92 times and 0.72 times of conventional fibre reinforced composite (embodiment 2).
Embodiment 2
Present embodiment and embodiment 1 are different is that the wood powder of said composite material by adopting is 30 parts, and particle diameter is 50 orders, and all the other are with embodiment 1.
Through test, the tensile strength of this matrix material is 83.6MPa, and flexural strength is 72.8MPa, and shock strength is 37.5KJ/m
2, density is 0.64g/cm
3
Embodiment 3
Present embodiment and embodiment 1 are different is that the wood powder of said composite material by adopting is 40 parts, and particle diameter is 100 orders, and non-woven is the polyester needle fabric, and grammes per square metre is 50g/m
2, all the other are with embodiment 1.
Through test, the tensile strength of this matrix material is 96MPa, and flexural strength is 81.4MPa, and shock strength is 46KJ/m
2, density 0.71 is g/cm
3
Embodiment 4
What present embodiment and embodiment 1 were different is that described matrix material is added with 15 parts of azodicarbonamide foaming agents, and all the other are with embodiment 1.
Through test, the tensile strength of this matrix material is 80MPa, and flexural strength is 71MPa, and shock strength is 36KJ/m
2, density 0.60 is g/cm
3
Embodiment 5
Matrix material described in the present embodiment is that 60 parts of wood powders of 300 purposes constitute by 100 parts of Vilaterm and particle diameter by weight, and non-woven is the nylon needle fabric, and grammes per square metre is 80g/m
2, all the other are with embodiment 1.
Through test, the tensile strength of this matrix material is 93MPa, and flexural strength is 77.8MPa, and shock strength is 41KJ/m
2, density is 0.65g/cm
3
Claims (3)
1. a wood plastic composite is characterized in that this matrix material is 20～80g/m with grammes per square metre
2Needle fabric as strongthener, serve as to form matrix with the wood powder of the thermoplastic high polymer that comprises 100 weight parts and 10～60 weight parts, process through compound; Described thermoplastic high polymer is Vilaterm, Vestolen PP 7052, SE or PS; Described wood powder particle diameter is 20～300 orders; The preparation method of this matrix material mixes described thermoplastic high polymer and wood powder and whipping agent earlier in single screw extrusion machine; After the fusion; Be expressed in the mould that is equipped with said needle fabric in advance; Pass through compression molding again, promptly make said with the wood plastic composite of non-woven as strongthener; Described whipping agent is a Cellmic C 121, and add-on is 5～15 weight parts.
2. wood plastic composite according to claim 1 is characterized in that described needle fabric is polypropylene fibre needle fabric, trevira needle fabric, nylon needle fabric or flaxen fiber needle fabric.
3. wood plastic composite according to claim 1 is characterized in that described thermoplastic high polymer is Vilaterm, Vestolen PP 7052, SE or the PS that reclaims or abandon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010515352A CN101982488B (en) | 2010-10-22 | 2010-10-22 | Wood plastic composite and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010515352A CN101982488B (en) | 2010-10-22 | 2010-10-22 | Wood plastic composite and preparation method thereof |
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| CN101982488A CN101982488A (en) | 2011-03-02 |
| CN101982488B true CN101982488B (en) | 2012-10-10 |
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| CN201010515352A Expired - Fee Related CN101982488B (en) | 2010-10-22 | 2010-10-22 | Wood plastic composite and preparation method thereof |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775803A (en) * | 2012-08-16 | 2012-11-14 | 江苏旭华圣洛迪建材有限公司 | Plastic wood material capable of reinforcing deformation resistance and preparation method thereof |
| CN102911508A (en) * | 2012-11-13 | 2013-02-06 | 东北林业大学 | Polyester fiber enhanced wood-plastic composite material and preparation method thereof |
| CN104387786A (en) * | 2014-11-04 | 2015-03-04 | 浙江红高梁木业有限公司 | Novel impact-resistant wood-plastic composite material and novel preparation method thereof |
| CN105585867A (en) * | 2014-11-18 | 2016-05-18 | 中国科学院宁波材料技术与工程研究所 | Wood-plastic composite material reinforced by waste fabrics and preparation method thereof |
| CN104592690A (en) * | 2015-02-10 | 2015-05-06 | 张海涛 | Wood-plastic profile made from PVC resin powder isolated from aluminum plastic wrapper |
| CN105820528A (en) * | 2016-04-18 | 2016-08-03 | 武汉纺织大学 | Method for preparing unsaturated polyester composite board from waste needle-punched nonwoven fabrics |
| CN106117709A (en) * | 2016-06-24 | 2016-11-16 | 桂林舒康建材有限公司 | The PE base wood-plastic composite material that mechanical property is good |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249169C (en) * | 2003-05-06 | 2006-04-05 | 北京艾司木环保科技有限公司 | Composite material formed from waste plastic and wood powder and hard board shaped by using said material |
| CN101724190B (en) * | 2008-10-14 | 2011-11-16 | 青岛理工大学 | Asbestos fiber reinforced thermoplastic base wood and plastic composite material and preparing method thereof |
| CN101629022B (en) * | 2009-08-14 | 2011-07-13 | 东北林业大学 | Aramid fiber enhanced wood-plastic composite material and preparation method thereof |
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2010
- 2010-10-22 CN CN201010515352A patent/CN101982488B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
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| 林群芳等.木粉增强聚丙烯力学性能的改善方法.《现代化工》.2002,(第05期), * |
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