Lightweight wood-plastic composite fiberboard and preparation method thereof

A wood-plastic composite and wood fiber technology is applied in the fields of wood-plastic composite materials and their manufacture, light-weight wood-plastic composite fiberboards and their preparation fields, and can solve the problems of being unsuitable for wood-plastic composite materials, damage of wood flour fibers, and high product cost. , to reduce the average density and production cost, improve the strength, improve the effect of sound insulation

Inactive Publication Date: 2017-01-04
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But above-mentioned patents all adopt wood powder as filler, and wood powder content is all lower than 40%, and product cost is higher; And wood powder is all granular, and wood powder fiber has been destroyed, and intensity declines; All adopt extrusion method to produce , the size of the product is small, not suitable for the production of wood-plastic composite materials with high wood-plastic ratio

Method used

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  • Lightweight wood-plastic composite fiberboard and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Activation treatment of wood fiber

[0045] Mix the deionized water and the activator, use the spray nozzle and the mixer to evenly spray the activator on the wood fiber, so that the content of the activator in the wood fiber containing the activator is 5%, and the moisture content is 70%, and then put it into the drying box Inside, the wood fiber is activated when the activation temperature is 160°C, and when the wood fiber is dried to a moisture content of 1%, it is enough;

[0046] 2) Grafting treatment of wood fiber

[0047] The activated wood fiber is sprayed with dimethyltriphenylmethane isocyanate acetone solution, the sizing amount is 1.5%, and put into the drum dryer to make the isocyanate solidify;

[0048] 3) High-mix processing

[0049] The modified wood fiber, high-density polyethylene, DOP plasticizer, maleic anhydride grafted polyethylene, AC foaming agent, dibasic lead phosphite according to the ratio of 6:3:0.1:0.1:0.1:0.7 Add the ratio of the mix...

Embodiment 2

[0056] 1) Activation treatment of wood fiber

[0057] Mix the deionized water and the activator, use the spray nozzle and the mixer to evenly spray the activator on the wood fiber, so that the content of the activator in the wood fiber containing the activator is 5%, and the moisture content is 70%, and then put it into the drying box Inside, the wood fiber is activated when the activation temperature is 160°C, and when the wood fiber is dried to a moisture content of 1%, it is enough;

[0058] 2) Grafting treatment of wood fiber

[0059] The activated wood fiber is sprayed with dimethyltriphenylmethane isocyanate acetone solution, the sizing amount is 1%, and put into the drum dryer to make the isocyanate solidify;

[0060] 3) High-mix processing

[0061] The modified wood fiber, high-density polyethylene, DOP plasticizer, maleic anhydride grafted polyethylene, AC foaming agent, dibasic lead phosphite according to the ratio of 6:3:0.15:0.15:0.1:0.6 Add the ratio of the mix...

Embodiment 3

[0068] The physical and mechanical properties of the board are tested with reference to GB / T17657-1999 "Test methods for physical and chemical properties of wood-based panels and veneered wood-based panels", GB / T10294-2008 "Determination of steady-state thermal resistance and related characteristics of thermal insulation materials", GB / T18696.1 -2004 "Measurement of Sound Absorption Coefficient and Acoustic Impedance in Acoustic Impedance Tube Part I: Standing Wave Ratio Method", test results see figure 1 .

[0069] Control group 1

[0070] Compared with Example 1, the step of activation treatment of wood fiber is reduced, and other processes and formulations are consistent with Example 1.

[0071] The physical and mechanical properties of the board are tested with reference to GB / T17657-1999 "Test methods for physical and chemical properties of wood-based panels and decorative wood-based panels", GB / T10294-2008 "Determination of steady-state thermal resistance and related ch...

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Abstract

The invention discloses a lightweight wood-plastic composite fiberboard and a preparation method thereof. The lightweight wood-plastic composite fiberboard is composed of hot-ground wooden fiber, high-density polyethylene, a foaming agent and other additives. The prepared composite fiberboard has wooden fiber content of 60 to 70%, average density of 800 to 900 kg/m<3>, an average pore size of 50 [mu]m and porosity of 20 to 30%. The preparation method comprises the following steps: subjecting the wooden fiber to alkaline activation and isocyanate grafting; and then subjecting the modified wooden fiber, polyethylene, the foaming agent and other auxiliary agents to high-speed mixing, granulation, mould pressing, foaming and rapid cooling. The lightweight wood-plastic composite fiberboard has same advantages as a fiberboard and a wood-plastic composite and has the advantages of good dimensional stability, high strength-to-weight ratio, good shock resistance, anticorrosion performance, pest damage resistance, sound insulation performance, heat insulation performance, etc. The lightweight wood-plastic composite fiberboard has a wide application scope and is applicable to fields like decoration, buildings, floors, municipal projects, packaging and automotive interior decorative parts.

Description

technical field [0001] The invention relates to a wood-plastic composite material and a manufacturing method thereof, in particular to a lightweight wood-plastic composite fiberboard and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] Wood-plastic composite material is a composite material made of wood powder and hot-melt plastic as the main raw material. It has a series of special properties superior to wood and plastic: it has a wooden appearance and secondary processability similar to wood, but its dimensional stability is lower than that of wood. Wood is good, and has low water absorption, is not afraid of insects, and will not produce cracks and warping deformation like wood; it has the processability of thermoplastics, but its hardness is higher than that of plastics, and it is wear-resistant, aging-resistant, and corrosion-resistant. It has the advantages of excellent water resistance, dimensional stability an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/02C08L23/06C08L51/06C08K3/32C08K5/12C08J9/10
Inventor 张扬唐睿琳于志明
Owner BEIJING FORESTRY UNIVERSITY
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