CN103351557A - PVC wood-plastic composite material and machine shaping method thereof - Google Patents
PVC wood-plastic composite material and machine shaping method thereof Download PDFInfo
- Publication number
- CN103351557A CN103351557A CN2013103208632A CN201310320863A CN103351557A CN 103351557 A CN103351557 A CN 103351557A CN 2013103208632 A CN2013103208632 A CN 2013103208632A CN 201310320863 A CN201310320863 A CN 201310320863A CN 103351557 A CN103351557 A CN 103351557A
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- pvc
- vegetable fibre
- plastic composite
- wood plastic
- stablizer
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Classifications
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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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
Abstract
The invention provides a PVC (Polyvinyl Chloride) wood-plastic composite material. The PVC wood-plastic composite material is prepared from the following components in percentage by weight: 25-30 percent of plant fiber, 45-50 percent of PVC, 20-25 percent of talcum powder, 2.5-3 percent of stabilizer, 3-3.5 percent of anti-impact agent, 0.05-0.1 percent of lubricant and 0.05-0.3 percent of coloring agent. According to the invention, the mechanical property of the wood-plastic composite material is improved, and strength and hardness are better.
Description
Technical field
The present invention relates to wood plastic composite and processing molding method thereof, be specifically related to a kind of vegetable fibre with PVC plastics, powdery prepare high performance wood plastic composite with and processing molding method.
Background technology
Wood plastic composite refers to that vegetable fibre and thermoplastic polymer mix, the advanced composite material that forms by the melt-processed moulding.Wood plastic composite has been gathered the advantage of timber and plastics, higher than plastics lumber hardness, easily painted, prevent more that than solid wood products moth, water-absorbent are less, and this material there is corrosion-resistant, the closely similar advantage of warpage, easy to maintenance, outward appearance and timber not.At present, wood plastic composite keeps rapid growth in worldwide application.
Contain a large amount of hydrogen bonds among the vegetable fibre molecule, have the more intense effect of intermolecular hydrogen bonding polarity and wetting ability, mix with non-hydrophilic thermoplastic material, wood powder tends to reunite among blend, causes the interface wet ability of vegetable fibre and thermoplastic material, interfacial bond effect poor.Therefore, the people in the industry constantly seeks to improve the materials and methods of the interface binding power of vegetable fibre and thermoplastic material.
At present, what many wood plastic composites that people use adopted is that the PE plastics are the wood-plastic products of matrix, but PE wood-plastic products hardness is low, fragility is large, creep is large, mechanical property is low, mainly be to be applied to guardrail, floor, refuse container, Hua Chi, pallet etc., it is matrix that people attempt with other plastics, with the broadened application scope.
Summary of the invention
The invention provides a kind of PVC wood plastic composite, improved the mechanical property of wood plastic composite, toughness is better.
The invention provides a kind of PVC wood plastic composite, comprise composition by weight percentage:
Vegetable fibre: 25～30%;
PVC：45～50%；
Talcum powder: 20～25%;
Stablizer: 2.5～3%;
Anti-impact agent: 3～3.5%;
Lubricant: 0.05～0.1%;
Tinting material: 0.1～0.3%;
Wherein, described vegetable fibre is through the surface modification treatment of silane coupling agent.
Further, the summation of the weight percent of described vegetable fibre, described PVC, described talcum powder, described stablizer, described anti-impact agent, described lubricant and described tinting material is absolutely.
Further, the particle diameter of described vegetable fibre is greater than 60 orders.
Further, described talcous particle diameter is 800 orders～3000 orders.
Further, described stablizer is one or several mixture of thermo-stabilizer, oxidation inhibitor, UV light absorber and sequestrant.
Further, described lubricant is stearate.
Further, described anti-impact agent is ACM.
The present invention also provides a kind of processing molding method of PVC Wood plastic boards, adopts following processing step to be prepared:
(1) among homogenizer, add dry vegetable fibre, stirring heating, the ethanolic soln that adds silane coupling agent activates vegetable fibre, drying, discharging;
(2) will comprise the mixture blend of following component,
The vegetable fibre that previous step obtains: 25～30%;
PVC：45～50%；
Talcum powder: 20～25%;
Stablizer: 2.5～3%;
Anti-impact agent: 3～3.5%;
Lubricant: 0.05～0.1%;
Tinting material: 0.05～0.3%.
(3) first vegetable fibre, PVC and talcum powder are added high-speed mixer and stir, be warming up to 80～100 ℃, mix 8～15min, fully discharge moisture content; Add the auxiliary agents such as stablizer, anti-impact agent, lubricant, tinting material, mix 4～6min; Again with the material discharging to low speed mixer, mix and blend cooling;
(4) by the conical double screw extruder extruding pelletization, melt pressure is 4～7MPa;
(5) material particles that will make adds conical double-screw machine forcing machine to be extruded, and cuts into the length of regulation after the cooling again, makes Wood-plastic profiles.
With respect to prior art, PVC wood plastic composite of the present invention has the following advantages: the mechanical property of PVC wood plastic composite is better than the mechanical property of PE wood plastic composite, major cause is silane coupling agent and vegetable fibre surface hydroxyl generation chemical reaction, and the lipophilicity of vegetable fibre is strengthened.Vegetable fibre is after surface modification simultaneously, its surperficial wetting ability OH group number reduces, between PVC and the vegetable fibre surface stronger surface bond is arranged, improved the consistency of vegetable fibre and PVC and the dispersiveness among PVC thereof, so the mechanical property of matrix material obviously improves.
Embodiment
Embodiment given below is to concrete description of the present invention, can not be interpreted as the restriction to protection scope of the present invention, and those of ordinary skill in the art still belongs to protection scope of the present invention to some nonessential improvement and adjustment that the present invention makes.
The first embodiment
(A) raw material mixes
Among homogenizer, add dried vegetable fibre, heat up while stir, be warming up to the ethanolic soln (massfraction of silane coupling agent is 50%) that adds silane coupling agent after 90 ℃, stirred 6 minutes, dry discharging in the time of 100 ℃.
Taking by weighing weight part according to weight proportion is 45 PVC, and the melting index of this recycled plastic powder is 0.3kg/10min, and ash content is less than 1%; The particle diameter good with drying is that 80 orders, weight part are 25 wood powders (common hardwood flour, water content are lower than 3% weight percentage); Be 24 with weight part, particle diameter is 1100 purpose talcum powder, and is commercially available; Weight part is that the trade mark that Nanjing Xiehe Chemistry Co., Ltd. of 2.8 produces is the one package stabilizer of CH101; Weight part is 3 anti-impact agent ACM (formal name used at school is chlorinatedpolyethylene-alkyl acrylate interpenetrating network copolymer); With weight part be 0.1 Zinic stearas (lubricant); With weight part be 0.1 tinting material.
(B) batch mixing
Mixing equipment comprises high-speed mixer and low speed mixer.
The said mixture material is dropped among the high-speed mixer in batches, and (1) adds high-speed mixer with vegetable fibre, PVC and talcum powder first and stirs, be warming up to 80 ℃, mixes 10min, fully discharges moisture content; (2) add the auxiliary agents such as stablizer, anti-impact agent, lubricant, tinting material, at 80 ℃, mix 5min; (3) with the material discharging to low speed mixer, mix and blend is cooled to 40 ℃.
(C) granulation
Utilize vacuum feeder to be evacuated to the tablets press funnel, by conical double screw extruder high temperature extruding pelletization, the temperature process condition of granulating extruder is as shown in table 1, and melt pressure is 5MPa, and the pelletizing rotating speed is 150r/min, then send cooling rear encapsulation by force 3 wind.Here select tapered twin screw extruder, the feeding section diameter of its tapered screw rod is larger, can compress continuously material, can shorten the residence time of material in machine barrel, and the metering zone diameter is little, shearing to molten materials is little, and this is a large advantage for processing thermo-sensitivity wood plastic composite.
The temperature process condition of table 1 granulating extruder
(D) extrude
The material particles made is added conical double-screw machine forcing machine, and high temperature is extruded, the temperature process condition of moulding forcing machine as
Shown in the table 2, by cutting into the length of regulation after the water quench, the sheet material of gained is Wood-plastic profiles.
The temperature process condition of table 2 moulding forcing machine
The second embodiment
Raw material mixes
Among homogenizer, add dried vegetable fibre, heat up while stir, be warming up to the ethanolic soln (massfraction of silane coupling agent is 30%) that adds silane coupling agent after 90 ℃, stirred 10 minutes, dry discharging in the time of 100 ℃.
Taking by weighing weight part according to weight proportion is 49 PVC, and the melting index of this recycled plastic powder is 0.3kg/10min, and ash content is less than 1%; The particle diameter good with drying is that 80 orders, weight part are 25 wood powder (common hardwood flour, water content are lower than 3% weight percentage); Be 20 with weight part, particle diameter is 800 purpose talcum powder, and is commercially available; Weight part is that the trade mark that Nanjing Xiehe Chemistry Co., Ltd. of 2.8 produces is the one package stabilizer of CH101; Weight part is 3 anti-impact agent ACM; With weight part be 0.1 Zinic stearas (lubricant); With weight part be 0.1 tinting material.
Batch mixing, granulation and the processing parameter extruded can carry out rational, trickle adjusting according to those of ordinary skill in the art's simple experience and knowledge with reference to the processing parameter of the first embodiment.
Comparative Examples
The raw material of regular convention formula mixes
Taking by weighing weight part according to weight proportion is 45 PE, and the melting index of this recycled plastic powder is 0.3kg/10min, and ash content is less than 1%; With drying good, particle diameter is 80 purposes, 25 weight part wood powders (common hardwood flour, water content are lower than 3% weight percentage); Be 20 with weight part, particle diameter is 800 purpose calcium carbonate, and is commercially available; Weight part is 4 coupling agent, is Nanjing dawn chemical industry company limited; Weight part is 2 AC whipping agent; Weight part is 3 anti-impact agent ACM; With weight part be 0.5 Zinic stearas (lubricant); With weight part be 0.5 tinting material.
Batch mixing, granulation and the processing parameter extruded be with reference to the processing parameter of the wood plastic composite moulding of the first embodiment of the present invention, the second embodiment, carries out rational, trickle adjusting according to those of ordinary skill in the art's simple experience and knowledge.
Carry out performance measurement by the Wood plastic boards that three kinds of different composition of raw materials manufacturings are obtained, obtain the result as follows:
Table 3 performance perameter contrast table
| Project | Ultimate load/N | Flexural strength/MPa | Shore hardness |
| Comparative Examples | 2018 | 22 | 75 |
| The first embodiment | 3958 | 42 | 92 |
| The second embodiment | 4012 | 39 | 94 |
Can be clear that by table 3, wood plastic composite and the Comparative Examples of the first embodiment, the second embodiment, the above two ultimate load, flexural strength and shore hardness all are far superior to the latter.
The modification ratio PE of PVC is better, so that the performance of PVC wood plastic composite is different from the PE wood plastic composite, PVC wood-plastic composite material products of the present invention can be used for such as door, floor, skirting, door pocket etc.
Claims (7)
1. a PVC wood plastic composite is characterized in that, comprises composition by weight percentage:
Vegetable fibre: 25～30%;
PVC：45～50%；
Talcum powder: 20～25%;
Stablizer: 2.5～3%;
Anti-impact agent: 3～3.5%;
Lubricant: 0.05～0.1%;
Tinting material: 0.1～0.3%;
Wherein, described vegetable fibre is through the surface modification treatment of silane coupling agent.
2. PVC wood plastic composite as claimed in claim 1 is characterized in that, the summation of the weight percent of described vegetable fibre, described PVC, described talcum powder, described stablizer, described anti-impact agent, described lubricant and described tinting material is absolutely.
3. PVC wood plastic composite as claimed in claim 1 is characterized in that, the particle diameter of described vegetable fibre is greater than 60 orders.
4. PVC wood plastic composite as claimed in claim 1 is characterized in that, described stablizer is one or several mixture of thermo-stabilizer, oxidation inhibitor, UV light absorber and sequestrant.
5. PVC wood plastic composite as claimed in claim 1 is characterized in that, described anti-impact agent is ACM.
6. the processing molding method of a PVC Wood plastic boards is characterized in that, adopts following processing step to be prepared:
(1) among homogenizer, add dry vegetable fibre, stirring heating, the ethanolic soln that adds silane coupling agent activates vegetable fibre, drying, discharging;
(2) will comprise the mixture blend of following component,
The vegetable fibre that previous step is obtained: 25～30%;
PVC：45～50%；
Talcum powder: 20～25%;
Stablizer: 2.5～3%;
Anti-impact agent: 3～3.5%;
Lubricant: 0.05～0.1%;
Tinting material: 0.1～0.3%;
(3) first vegetable fibre, PVC and talcum powder are added high-speed mixer and stir, be warming up to 80～100 ℃, mix 8～15min, fully discharge moisture content; Add the auxiliary agents such as stablizer, anti-impact agent, lubricant, tinting material, mix 4～6min; Again with the material discharging to low speed mixer, the mix and blend cold cut;
(4) by the conical double screw extruder extruding pelletization, melt pressure is 4～7MPa;
(5) material particles that will make adds conical double-screw machine forcing machine to be extruded, and cuts into the length of regulation after the cold cut again, makes Wood-plastic profiles.
7. the processing molding method of PVC Wood plastic boards as claimed in claim 1, it is characterized in that, the summation of the weight percent of described vegetable fibre, described PVC, described talcum powder, described stablizer, described anti-impact agent, described lubricant and described tinting material is absolutely.
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| CN2013103208632A CN103351557A (en) | 2013-07-26 | 2013-07-26 | PVC wood-plastic composite material and machine shaping method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103980636A (en) * | 2014-05-30 | 2014-08-13 | 甘肃昱晖新材料有限公司 | Wood-plastic foamed composite material and preparation method thereof |
| CN104559277A (en) * | 2014-12-26 | 2015-04-29 | 芜湖职业技术学院 | Wood-plastic composite material and preparation method thereof |
| CN104890132A (en) * | 2015-04-29 | 2015-09-09 | 桐城市诚信木塑科技材料有限公司 | Wood plastic floor production process |
| CN106046604A (en) * | 2016-06-30 | 2016-10-26 | 芜湖三刀材料科技有限公司 | Wood-plastic material for skirtings and preparation method thereof |
| CN106117874A (en) * | 2016-06-30 | 2016-11-16 | 芜湖三刀材料科技有限公司 | Cabinet material and preparation method thereof moulded by a kind of wood |
| CN108948595A (en) * | 2018-08-06 | 2018-12-07 | 合肥岑遥新材料科技有限公司 | A kind of high tenacity anti-ageing wood-plastic composite and its application |
| CN109054250A (en) * | 2018-08-06 | 2018-12-21 | 合肥岑遥新材料科技有限公司 | A kind of wood plastic composite of high mallow stem hide fiber enhancing and its application |
| CN109135110A (en) * | 2018-08-06 | 2019-01-04 | 合肥岑遥新材料科技有限公司 | A kind of preparation method of high-intensity shielding type wood plastic composite |
| CN110527171A (en) * | 2019-09-06 | 2019-12-03 | 绍兴市杰品木塑有限公司 | A kind of fade-proof wood-plastic clad plate and preparation method thereof |
| CN113861711A (en) * | 2021-09-14 | 2021-12-31 | 浙江亚厦装饰股份有限公司 | Wood-plastic composite section with low aging and fading speed and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103980636A (en) * | 2014-05-30 | 2014-08-13 | 甘肃昱晖新材料有限公司 | Wood-plastic foamed composite material and preparation method thereof |
| CN103980636B (en) * | 2014-05-30 | 2017-01-04 | 甘肃昱晖新材料有限公司 | A kind of Wood-plastic foam composite and preparation method thereof |
| CN104559277A (en) * | 2014-12-26 | 2015-04-29 | 芜湖职业技术学院 | Wood-plastic composite material and preparation method thereof |
| CN104890132A (en) * | 2015-04-29 | 2015-09-09 | 桐城市诚信木塑科技材料有限公司 | Wood plastic floor production process |
| CN106046604A (en) * | 2016-06-30 | 2016-10-26 | 芜湖三刀材料科技有限公司 | Wood-plastic material for skirtings and preparation method thereof |
| CN106117874A (en) * | 2016-06-30 | 2016-11-16 | 芜湖三刀材料科技有限公司 | Cabinet material and preparation method thereof moulded by a kind of wood |
| CN108948595A (en) * | 2018-08-06 | 2018-12-07 | 合肥岑遥新材料科技有限公司 | A kind of high tenacity anti-ageing wood-plastic composite and its application |
| CN109054250A (en) * | 2018-08-06 | 2018-12-21 | 合肥岑遥新材料科技有限公司 | A kind of wood plastic composite of high mallow stem hide fiber enhancing and its application |
| CN109135110A (en) * | 2018-08-06 | 2019-01-04 | 合肥岑遥新材料科技有限公司 | A kind of preparation method of high-intensity shielding type wood plastic composite |
| CN110527171A (en) * | 2019-09-06 | 2019-12-03 | 绍兴市杰品木塑有限公司 | A kind of fade-proof wood-plastic clad plate and preparation method thereof |
| CN113861711A (en) * | 2021-09-14 | 2021-12-31 | 浙江亚厦装饰股份有限公司 | Wood-plastic composite section with low aging and fading speed and preparation method thereof |
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