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Preparation method of wood-plastic compound material with improved strength

A wood-plastic composite material and strength technology, applied in the field of wood-plastic composite materials, can solve the problems of low interface bonding strength and low strength of wood-plastic composite materials, and achieve the effects of reducing water absorption, improving fluidity, and improving mechanical properties

Inactive Publication Date: 2011-06-29
SHANGHAI BESTON PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned patent applications can solve certain problems, they still have not solved the problem of low interfacial bonding strength between hydrophilic plant fibers and hydrophobic polymers during the preparation of wood-plastic composites. The strength of the prepared wood-plastic composites Low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method for improving the strength of the wood-plastic composite material adopts the weight ratio of raw materials as follows:

[0030] Vegetable Fiber 70%

[0031] Aramid fiber 1%

[0032] Lubricant 6%

[0033] Plastic margin

[0034] Preparation steps:

[0035] (1) Firstly, the plant fibers are crushed, dried and sieved to obtain plant fibers with a mesh size of 10-100 and a moisture content below 4%.

[0036] (2) Alkali treatment is performed on the plant fiber in advance, that is, the plant fiber is soaked in NaOH solution with a mass fraction of 10%, soaked at room temperature for 4 hours, then washed with deionized water to become neutral, and dried to constant weight.

[0037] (3) The alkali-treated plant fibers, plastic particles, reinforcing fibers and lubricants are mechanically mixed in a high-speed mixer in proportion, and then placed in a twin-screw extruder for extrusion molding. The stirring speed is 1500 rpm, the mixing temperature is...

Embodiment 2

[0039] The preparation method for improving the strength of the wood-plastic composite material adopts the weight ratio of raw materials as follows:

[0040] Vegetable Fiber 50%

[0041] L-glass fiber 2%

[0042] Lubricant 5%

[0043] Waste plastic balance

[0044] Preparation steps:

[0045] (1) Firstly, the plant fibers are crushed, dried and sieved to obtain plant fibers with a mesh size of 10-100 and a moisture content below 4%.

[0046] (2) Alkali treatment is performed on the plant fibers in advance, that is, the plant fibers are soaked in NaOH solution with a mass fraction of 10%, soaked at room temperature for 4 hours, then rinsed with deionized water to become neutral, and dried to constant weight.

[0047] (3) The alkali-treated plant fibers, plastic particles, glass fibers and lubricants are mechanically mixed in a high-speed mixer according to the ratio of the above raw materials, and then placed in a twin-screw extruder for extrusion molding. Among them, the ...

Embodiment 3

[0049]The preparation method for improving the strength of the wood-plastic composite material adopts the weight ratio of raw materials as follows:

[0050] Vegetable Fiber 40%

[0051] L-glass fiber 3%

[0052] Lubricant 4%

[0053] Waste plastic balance

[0054] The preparation steps are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a wood-plastic compound material with improved strength. The wood-plastic compound material with improved strength comprises the following used raw materials by weight percent: 40-70% of plant fiber, 1-3% of reinforced fiber, 4-6% of lubricant and the balance of plastic. The preparation method comprises the following steps: fully mixing the raw materials through melt blending; and carrying out extrusion molding to obtain the wood-plastic compound material. In the technical scheme of the invention, the mechanical property of the whole wood-plastic compound material is enhanced by using the reinforced fiber, and the binding strength of the phase interface between wood powder and plastic is also improved. Simultaneously, specific additives are selected and used. For example, a coupling agent generates strong interface binding between the surfaces of wood powder and the plastic and can reduce water absorption property of the wood powder and improve the compatability and dispersibility between the wood powder and the plastic, therefore the mechanical property of the compound material is greatly improved; in addition, the flowability of a melt and the surface quality of an extrued product are improved by adding the lubricant, thereby obtaining the wood-plastic compound material with good mechanical property and excellent surface quality.

Description

technical field [0001] The invention relates to a wood-plastic composite material, in particular to a preparation method for improving the strength of the wood-plastic composite material. Background technique [0002] In recent years, due to the increasingly prominent global energy and environmental issues, wood-plastic composites that use natural plant fibers that are abundant in nature instead of synthetic fiber-reinforced resins have gradually attracted people's attention. Wood-plastic composite material combines the advantages of plastic and wood. It has long service life, beautiful appearance, low cost, insect-proof, anti-corrosion, anti-skid, sprayable, higher hardness than pure plastic products, and has the same machinability, bonding and Fixed and other advantages, and can be recycled. Therefore, it is widely used in doors, windows, floors, walls of buildings, ships, fences, furniture, automotive materials, etc. [0003] The existing preparation methods of wood-pla...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L3/02C08L77/10C08L23/06C08L23/12C08L27/06C08L23/08C08L23/14C08K13/04C08K7/14
Inventor 郑义红朱子东卞芬芬马时
Owner SHANGHAI BESTON PLASTICS
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