Preparation method of wood plastic material

A technology of wood-plastic materials and thermoplastics, applied in the field of preparation of wood-plastic materials, can solve the problems of weakening the mechanical properties of materials, insufficient strength of products, and many bubbles in products, and achieve the effects of high toughness, low cost and improved quality

Inactive Publication Date: 2010-06-23
CHONGQING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the two are combined, the interface strength is very poor, which greatly weakens the mechanical properties of the material, especially the impact properties
[0006] However, in the prior art, the method of mixing wood powder or plant fibers with polymers to prepare wood-plastic composite materials has disadvantages such as high cost and more equipment required, and the strength of the produced products is not high enough, and the toughness is relatively low. Low, there are more air bubbles in the product, which cannot meet the actual needs of the market

Method used

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  • Preparation method of wood plastic material
  • Preparation method of wood plastic material
  • Preparation method of wood plastic material

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preparation example Construction

[0028] The preparation method of the wood-plastic material of the present invention is characterized in that: select the following raw materials, mix the following raw materials at a high speed, and then carry out kneading on an open mill to produce a billet, and finally pass the prepared billet through a flat vulcanizing machine Carry out thermoforming;

[0029] Raw material weight content (parts)

[0030] Thermoplastic 100

[0031] Wood powder or plant fiber 20~50

[0032] Silane or aluminate coupling agent 0.4~0.9

[0033] Ethylene-vinyl acetate 4~15

[0034] Paraffin 0.8~1.5.

Embodiment 1

[0036] Prepare materials according to the following weight fractions

[0037] Raw material weight content (parts)

[0038] Polypropylene 100

[0039] poplar wood powder 30

[0040] Aluminate coupling agent 0.5

[0041] Ethylene-vinyl acetate 10

[0042] Paraffin 1

[0043] Among them, polypropylene is selected as thermoplastic, and polypropylene is extrusion grade. Torque rheology test shows that the maximum torque is 50-60N m. Poplar wood powder is selected as wood powder or plant fiber, and the particle size is 100 mesh ( About 165μm), ethylene-vinyl acetate (EVA), VA content 18%, paraffin wax is translucent granular;

[0044] 2) First modify the poplar wood powder, dry the poplar wood powder at 120°C for 4 hours, dilute the aluminate coupling agent with absolute ethanol or acetone or other suitable diluents, mix it with the wood powder evenly, and then bake Dry;

[0045] 3) Use a double-roller mill for mixing. Control the roll temperature at 150 / 135°C (A roll / B roll...

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Abstract

The invention discloses a preparation method of wood plastic material, which comprises the following raw materials according to parts by weight: 100 parts of thermoplastic plastic, 20-50 parts of wood powder or vegetable fibre, 0.4-0.9 part of silane or aluminate coupling agent, 4-15 parts of ethylene-vinylacetate and 0.8-1.5 parts of paraffin. The above materials are mixed at a high speed and are milled on an open mill, a blank is prepared, and the prepared blank is shaped by hot pressing by a vulcanizer. The invention has simple operation, needs less equipment, correspondingly lowers operation difficulty and equipment investment, can lower cost, has strong competitive power, especially can substantially lower and put an ends to air bubbles in products, improves the quality of a product and improves the rank; the product has the advantages of high strength, light weight, worm damage prevention, low cost, no toxin, environment protection and reuse.

Description

technical field [0001] The invention relates to a composition of a wood-plastic material and a manufacturing process thereof, belonging to a method for reusing wood processing waste or plant fibers, and in particular to a method for preparing wood-plastic materials by mixing wood powder or plant fibers with thermoplastics. A composite material method and the prepared high-strength wood-plastic composite material. Background technique [0002] Wood Plastic Composites (WPC, Wood Plastic Composites) is a composite material made of plastic and wood powder or plant fibers. Its commercial application began in the mid-1950s. Due to the increasing shortage of timber, oil and other resources, "replacing wood with plastic" has received great attention from the society. Since the 1990s, wood-plastic materials have developed rapidly. Compared with traditional materials, wood-plastic products have unique advantages: no defects of wood products (knots, oblique grains, decay, etc.), a w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L23/12C08L97/02C08L23/08C08K5/01B29B7/72B29C35/02
Inventor 陈元芳许洪斌胡建军宫敬禹杨长辉
Owner CHONGQING UNIV OF TECH
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