CN103341990B - Method for preparing wood-plastic composite plate material through layered lamination method - Google Patents
Method for preparing wood-plastic composite plate material through layered lamination method Download PDFInfo
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- CN103341990B CN103341990B CN201310260159.2A CN201310260159A CN103341990B CN 103341990 B CN103341990 B CN 103341990B CN 201310260159 A CN201310260159 A CN 201310260159A CN 103341990 B CN103341990 B CN 103341990B
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Abstract
The invention discloses a method for preparing a wood-plastic composite plate material through a layered lamination method, relates to a preparation method of the wood-plastic composite plate material, and aims to solve the problems of surface pasting blackening and low surface bonding strength of the wood-plastic composite plate material prepared through an existing hot-pressing method. The method for preparing the wood-plastic composite plate material comprises the following steps of: (1) uniformly mixing biomass fibers, a coupling agent, thermoplastic plastic powder or thermoplastic plastic fibers, paving to form a core plate blank, and hot-pressing the core plate blank in a hot press to obtain a core plate; (2) paving upper surface layer materials on upper and lower surface layers of the core plate, and continuously performing hot-pressing; (3) cold-pressing the core plate in a cold press to complete layered lamination. According to the layered lamination method, hot-pressing time is shortened, the primary color of wood powder is remained, and the pasting and blackening of surface layer biomass raw materials caused by thermal degradation are avoided. The method is mainly applied to preparation of the wood-plastic composite plate material.
Description
Technical field
The present invention relates to a kind of preparation method of wood-plastic composite panel.
Background technology
Wood plastic composite is the composite wood utilizing wood fibre and thermoplastics processing, its raw material can be the biomass fibers such as waste and old wood, agricultural crop straw, bamboo wood, hards, the thermoplastic such as polyethylene, polypropylene, polyvinyl chloride reclaimed, the regeneration for discarded object provides good approach.Wood plastic composite simultaneously has the advantage of water-fast, anticorrosion, dimensionally stable and formaldehydeless release, and production process and use procedure all have the feature of environmental protection.The aspect such as floor, construction hanging board, garden landscape building, Furniture manufacture, interior decoration has extensive use out of doors.
Pressure sintering is one of method preparing wood-plastic composite panel, it can utilize larger-size biomass fiber materials, ensure that elongated fibre morphology plays to strengthen and orientation, improve raw material availability, process the sheet material that book size is larger, and bending, complicated shape can be produced by secondary operations, be conducive to design ap-plication and on-the-spot processing.
Existing pressure sintering prepares biomass fiber and the plastic raw materials of the method majority employing drying regime of wood-plastic composite panel, heat transfer rate is slower, in order to make sandwich layer material fully melt in hot pressing, need longer hot pressing time, but long hot pressing time can cause the top layer biomass material thermal degradation of composite board, not only affect sheet material mechanical property but also make plate surface gelatinization blackening, affect outward appearance.If the composite board that processing thickness is larger, the gelatinization phenomenon of plate surface can be more serious.Not only outward appearance gelatinization blackening, directly affects use, and secondary faced deorative to add man-hour surface bonding intensity low.
Summary of the invention
The object of the invention is to prepare wood-plastic composite panel surface gelatinization blackening and the low problem of surface bonding intensity to solve existing pressure sintering, and provide layering to laminate the method for legal system for wood-plastic composite panel.
Layering of the present invention laminates legal system and follows these steps to realize for the method for wood-plastic composite panel:
One, biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber are mixed, then the sandwich layer slab that thickness is 3 ~ 4mm is mated formation into, sandwich layer slab puts into hot press the temperature of 170 ~ 190 DEG C, and under the pressure of 0.5 ~ 2MPa, hot pressing 3 ~ 5min obtains central layer;
Two, biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber are mixed, mat formation into the top layer material that thickness is 2 ~ 3mm, the upper surface of the central layer again top layer material lay obtained to step one and lower surface, then hot press is put into the temperature of 170 ~ 190 DEG C, hot pressing 3 ~ 5min under the pressure of 0.5 ~ 2MPa, obtains compressed wood plastic composite board;
Three, compressed wood plastic composite board is placed in cold press, is cooled to less than 60 DEG C, from cold press, takes out wood-plastic composite panel under the pressure of 0.4 ~ 1.5MPa, the layering completing wood-plastic composite panel laminates;
Wherein thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.
The present invention can repeat the surperficial lay top layer material of the compressed wood plastic composite board in step 2 as required, repeats hot pressing, successively thickeies until reach the design thickness of wood-plastic composite panel.
It is simple for the method for wood-plastic composite panel that layering of the present invention laminates legal system, the mixed material that biomass fiber, thermoplastic powder or fiber and coupling agent form is put into hot press and carries out hot pressing, it is made to melt adhesion, and then fusing central layer on lay mixed material, successively thicken the thickness of wood-plastic composite panel, each layer material can carry out plate construction design as required and adopt different material, such as fiber pressed different directions arrangement, use the fiber, different types of plastic matrix etc. of different-grain diameter, thus complete laminating of composite board.Layering used in the present invention laminates the fusing that method only need consider top layer material, therefore material melts process can be completed in short-term, the high temperature hot pressing of 170 ~ 190 DEG C is adopted to improve the heating and melting efficiency of mixed material, shorten hot pressing time, maintain wood powder primary colors, avoid the problem of gelatinization blackening that top layer biomass material causes because of thermal degradation and mechanical properties decrease.The inventive method hot-pressed board surface bonding intensity can reach 0.89MPa.
Accompanying drawing explanation
Fig. 1 is the wood-plastic composite panel exterior view that embodiment one obtains;
Fig. 2 is the wood-plastic composite panel exterior view that comparative example one obtains.
Detailed description of the invention
Detailed description of the invention one: present embodiment layering laminates legal system and follows these steps to implement for the method for wood-plastic composite panel:
One, biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber are mixed, then the sandwich layer slab that thickness is 3 ~ 4mm is mated formation into, sandwich layer slab puts into hot press the temperature of 170 ~ 190 DEG C, and under the pressure of 0.5 ~ 2MPa, hot pressing 3 ~ 5min obtains central layer;
Two, biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber are mixed, mat formation into the top layer material that thickness is 2 ~ 3mm, the upper surface of the central layer again top layer material lay obtained to step one and lower surface, then hot press is put into the temperature of 170 ~ 190 DEG C, hot pressing 3 ~ 5min under the pressure of 0.5 ~ 2MPa, obtains compressed wood plastic composite board;
Three, compressed wood plastic composite board is placed in cold press, is cooled to less than 60 DEG C, from cold press, takes out wood-plastic composite panel under the pressure of 0.4 ~ 1.5MPa, the layering completing wood-plastic composite panel laminates;
Wherein thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.
The layering of present embodiment laminates the fusing that method only need consider top layer material, therefore the high temperature of 170 ~ 190 DEG C is adopted to carry out hot pressing, improve the heating and melting efficiency of mixed material, shorten hot pressing time simultaneously, avoid the gelatinization blackening phenomena that top layer biomass material causes because of thermal degradation.
Detailed description of the invention two: present embodiment and detailed description of the invention one are 1:(0.05 ~ 0.09 unlike the mass ratio of biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber): (0.5 ~ 1.0).Other step and parameter identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two are wood-fibred, crushed straw aggregate, shive or bamboo fibre unlike biomass fiber.Other step and parameter identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three put into hot press the temperature of 170 ~ 175 DEG C unlike step 2, hot pressing under the pressure of 0.5 ~ 2MPa.Other step and parameter identical with one of detailed description of the invention one to three.
Embodiment one: the present embodiment layering laminates legal system and follows these steps to implement for the method for wood-plastic composite panel:
One, Poplar Powder, high density polyethylene (HDPE) (HDPE) and maleic anhydride grafted polyethylene (MAPE) are mixed, then the sandwich layer slab that thickness is 3mm is mated formation into, sandwich layer slab puts into hot press the temperature of 175 DEG C, and under the pressure of 1MPa, hot pressing 5min obtains central layer;
Two, Poplar Powder, high density polyethylene (HDPE) (HDPE) and maleic anhydride grafted polyethylene (MAPE) are mixed, mat formation into the top layer material that thickness is 2mm, the upper surface of the central layer again top layer material lay obtained to step one and lower surface, then hot press is put into the temperature of 175 DEG C, hot pressing 5min under the pressure of 1MPa, obtains compressed wood plastic composite board;
Three, compressed wood plastic composite board is placed in cold press, is cooled to 50 DEG C, from cold press, takes out wood-plastic composite panel under the pressure of 1MPa, the layering completing wood-plastic composite panel laminates;
The present embodiment step one and step 2 Poplar Powder, high density polyethylene (HDPE) (HDPE) are identical with maleic anhydride grafted polyethylene (MAPE) mixed proportion, and the wood-plastic composite panel obtained haves three layers altogether, and the sectional dimension of sheet material is 160 × 160mm.
Comparative example one: the preparation method of the present embodiment wood-plastic composite panel follows these steps to realize:
One, Poplar Powder, high density polyethylene (HDPE) and maleic anhydride grafted polyethylene are mixed, then mat formation into the slab that thickness is 7mm, slab puts into hot press with the temperature hot pressing 10min of 175 DEG C, completes wood-plastic composite panel.
The wood-plastic composite panel that this comparative example obtains has 1 layer, and the sectional dimension of sheet material is 160 × 160mm.
Adopt CIE1976L*a*b* colour system table look, (brightness value is less for the brightness value of the wood-plastic composite panel that measurement embodiment one and comparative example one obtain, color is then darker), the Surface lightness of the wood-plastic composite panel that layering laminating method obtains is 70, as shown in Figure 1; The Surface lightness of the wood-plastic composite panel that comparative example obtains is 52, as shown in Figure 2, illustrates that this method maintains the primary colors of wood powder.
With reference to the bending property of ASTM D790 standard testing wood-plastic composite panel, with reference to the shock resistance of GB/T1043.1-2008 standard testing wood-plastic composite panel, test result is in table one:
The performance test results of table one or two kind of wood-plastic composite panel
Surface bonding strength test is carried out to wood-plastic composite panel, Wooden veneer is attached to composite wood surface.Test according to GB/T17657-1999 " test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels ".Veneer overlay sheet material is sawn into the test specimen of 50mmx50mm, then mills out a cannelure with milling cutter in the one side of test specimen, the internal diameter of groove is the 35.7mm(area of a circle is 1000mm
2).Use CMMJ5504 type electronic universal mechanics machine to test its surface bonding intensity, loading speed is 2mm/s.
The surface bonding intensity of the wood-plastic composite panel that layering laminating method of the present invention obtains is 0.89MPa, and the surface bonding intensity of the wood-plastic composite panel that comparative example obtains is 0.6MPa.
Embodiment two: the present embodiment and the unique mass ratio unlike Poplar Powder, high density polyethylene (HDPE) and maleic anhydride grafted polyethylene of embodiment one are 1:(0.92): (0.08), other steps are identical with embodiment one with parameter.
Comparative example two: the present embodiment and the unique mass ratio unlike Poplar Powder, high density polyethylene (HDPE) and maleic anhydride grafted polyethylene of comparative example one are 1:(0.92): (0.08), other steps are identical with embodiment one with parameter.
With reference to the bending property of ASTM D790 standard testing wood-plastic composite panel, with reference to the shock resistance of GB/T1043.1-2008 standard testing wood-plastic composite panel, test result is in table two:
The performance test results of table two two kinds of wood-plastic composite panels
Embodiment three: the present embodiment and embodiment one uniquely use bamboo powder unlike biomass fiber, and other steps are identical with embodiment one with parameter.
Comparative example three: the present embodiment and comparative example one uniquely use bamboo powder unlike biomass fiber.
With reference to the bending property of ASTM D790 standard testing sheet material, with reference to the shock resistance of GB/T1043.1-2008 standard testing sheet material, test result is in table three:
The performance test results of table three two kinds of wood-plastic composite panels
Embodiment four: the present embodiment and embodiment two uniquely use bamboo powder unlike biomass fiber, and other steps are identical with embodiment two with parameter.
Comparative example four: the present embodiment and comparative example two uniquely use bamboo powder unlike biomass fiber.
With reference to the bending property of ASTM D790 standard testing sheet material, with reference to the shock resistance of GB/T1043.1-2008 standard testing sheet material, test result is in table four:
The performance test results of table four two kinds of wood-plastic composite panels
Shown by the experiment of above-mentioned table one to table four, adopt layering of the present invention to laminate the every mechanical property of the standby wood-plastic composite panel of legal system compared with tradition is once hot-forming obviously not reduce, but plate surface maintains wood powder primary colors (as Fig. 1), avoid the generation of top layer biomass material gelatinization blackening phenomena, the wood-plastic composite panel that comparative example one obtains is as Fig. 2.
Claims (4)
1. layering laminates the method for legal system for wood-plastic composite panel, it is characterized in that layering laminates legal system and follows these steps to realize for the method for wood-plastic composite panel:
One, biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber are mixed, then the sandwich layer slab that thickness is 3 ~ 4mm is mated formation into, sandwich layer slab puts into hot press the temperature of 170 ~ 190 DEG C, and under the pressure of 0.5 ~ 2MPa, hot pressing 3 ~ 5min obtains the central layer melted;
Two, biomass fiber, coupling agent, thermoplastic powder or thermoplastic fiber are mixed, mat formation into the top layer material that thickness is 2 ~ 3mm, the upper surface of the central layer of the fusing again top layer material lay obtained to step one and lower surface, then hot press is put into the temperature of 170 ~ 190 DEG C, hot pressing 3 ~ 5min under the pressure of 0.5 ~ 2MPa, obtains compressed wood plastic composite board;
Three, compressed wood plastic composite board is placed in cold press, is cooled to less than 60 DEG C, from cold press, takes out wood-plastic composite panel under the pressure of 0.4 ~ 1.5MPa, the layering completing wood-plastic composite panel laminates;
Wherein thermoplastic is polyethylene, polypropylene or igelite; Coupling agent is maleic anhydride inoculated polypropylene, maleic anhydride grafted polyethylene or silane coupler.
2. layering according to claim 1 laminates the method for legal system for wood-plastic composite panel, it is characterized in that biomass fiber, coupling agent, the mass ratio of thermoplastic powder or thermoplastic fiber is 1:(0.05 ~ 0.09): (0.5 ~ 1.0).
3. layering according to claim 1 laminates the method for legal system for wood-plastic composite panel, it is characterized in that biomass fiber is wood-fibred, crushed straw aggregate, shive or bamboo fibre.
4. the layering according to any one of claims 1 to 3 laminates the method for legal system for wood-plastic composite panel, it is characterized in that step 2 puts into hot press the temperature of 170 ~ 175 DEG C, hot pressing under the pressure of 0.5 ~ 2MPa.
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| CN201310260159.2A CN103341990B (en) | 2013-06-26 | 2013-06-26 | Method for preparing wood-plastic composite plate material through layered lamination method |
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| CN103341990B true CN103341990B (en) | 2015-07-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103832042A (en) * | 2014-03-20 | 2014-06-04 | 东北林业大学 | Carbon fiber cloth reinforced type wood-plastic composite material and preparation method thereof |
| CN107297940B (en) * | 2017-06-21 | 2019-09-10 | 海盐创通技术服务有限公司 | A kind of production technology of integrated wall plate |
| CN107351473B (en) * | 2017-07-05 | 2018-11-23 | 安徽省宗正农业科技开发有限公司 | A kind of processing technology of biomass combined plate |
| CN110181895B (en) * | 2019-06-04 | 2021-01-08 | 南宁市富诚家私有限责任公司 | Environment-friendly recycling method of biomass |
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| US4565723A (en) * | 1982-11-10 | 1986-01-21 | General Electric Plastics Structured Products Europe B.V. | Composite polymeric panel and process for making same |
| CN1911997A (en) * | 2006-07-15 | 2007-02-14 | 庄广盛 | Wear-resistant wood plastic floor and its production technology |
| CN1987018A (en) * | 2006-12-18 | 2007-06-27 | 徐肖虎 | Wood-plastic formwork for construction engineering |
| CN101318383A (en) * | 2008-07-01 | 2008-12-10 | 四川大学 | Manufacturing method of light wood-plastic composite panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100597858B1 (en) * | 2004-07-08 | 2006-07-10 | 이영남 | The method and product of architecturing board |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4565723A (en) * | 1982-11-10 | 1986-01-21 | General Electric Plastics Structured Products Europe B.V. | Composite polymeric panel and process for making same |
| CN1911997A (en) * | 2006-07-15 | 2007-02-14 | 庄广盛 | Wear-resistant wood plastic floor and its production technology |
| CN1987018A (en) * | 2006-12-18 | 2007-06-27 | 徐肖虎 | Wood-plastic formwork for construction engineering |
| CN101318383A (en) * | 2008-07-01 | 2008-12-10 | 四川大学 | Manufacturing method of light wood-plastic composite panel |
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