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Method for preparing Wood-plastic composite material by modified wood powder and waste and old plastics

A wood-plastic composite material and waste plastic technology, applied in the field of wood-plastic composite material preparation, can solve the problems of poor mechanical properties of wood-plastic composite materials, low polarity of blends, low interface compatibility, etc., and achieve broad market application Prospect, simple preparation process, low equipment requirements

Inactive Publication Date: 2009-03-25
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor compatibility between various plastic components, and the low polarity of the blend, the interface compatibility with lignocellulosic materials is low, and the prepared wood-plastic composites have poor mechanical properties, especially low impact properties. , not suitable for the production of wood-plastic composite products with high performance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Remove the dust from the discarded branches, and then use a mill to grind them into wood powder with a fineness of 120 mesh, and dry them at 110°C to make the water content ≤ 2%. Take 500 grams of dried wood powder, add 10 grams of isocyanate, 15 grams of maleic anhydride grafted polyethylene, and 10 grams of nitrile rubber in sequence, and mix them with wood powder in a high-speed mixer for 5 minutes before discharging to obtain Modified wood flour powder for standby.

[0027] Wash and crush recycled PVC and PE plastics with a weight ratio of 1:1 into pellets with a particle size of 10 mm, dry them to make their moisture content ≤ 2%, and take 450 grams for use.

[0028] Get the mixture of 500 grams of the above-mentioned standby modified wood powder and 450 grams of waste plastic particles and 13 grams of lubricant stearic acid, 13 grams of foaming agent sodium bicarbonate and 18 grams of foaming agent zinc oxide and add it to a high-speed mixer. Mix at high speed at...

Embodiment 2

[0031] The discarded moso bamboo is cleaned, crushed, and then ground into bamboo powder with a fineness of 100 mesh by a mill, and dried at 130° C. to make the water content ≤ 2%. Take 600 grams of dried wood powder, then add 6 grams of titanate coupling agent, 10 grams of hexamethyldisilazane coupling agent, and 30 grams of ethylene-methacrylic acid copolymer, one by one at high speed. After mixing with wood powder in the mixer for 10 minutes, the material is discharged to obtain modified moso bamboo powder for subsequent use.

[0032] Wash and crush the recycled plastics of PVC and PP with a weight ratio of 1:1 into pellets with a particle size of 12 mm, dry them to make their moisture content ≤ 2%, and take 400 grams for use.

[0033] Take 600 grams of the above-mentioned spare modified wood powder, 400 grams of waste plastic granule powder, 45 grams of strontium stearate lubricant, 9 grams of foaming agent toluenesulfonyl semicarbazide, 18 grams of zinc carbonate as foami...

Embodiment 3

[0036] Clean the peanut shells, grind them into powder with a fineness of 50 mesh with a mill, and dry them at 120°C to make the water content ≤ 2%. Take 750 grams of dried wood powder, then add 25 grams of styrene-maleic anhydride copolymer, 10 grams of aluminate coupling agent, and 15 grams of vinyl ethoxysilane coupling agent one by one at high speed. After being mixed with wood powder in a mixer for 20 minutes, the modified peanut shell powder is obtained for subsequent use.

[0037] Wash and crush recycled PVC, PE, and PP plastics with a weight ratio of 1:1:1 into pellets with a particle size of less than 8mm, dry them to make their moisture content ≤2%, and take 300 grams for use.

[0038] Take 700 grams of the above-mentioned spare modified peanut shell powder, 300 grams of waste plastic granules, 40 grams of paraffin wax as a lubricant, 25 grams of foaming agent azodicarbonamide, and zinc oxide, a foaming aid composed of a ratio of 1:1. Mix 50 grams with zinc acetate,...

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Abstract

The invention relates to a preparation technique of a wood plastic composite material, in particular to a method for preparing a wood plastic composite material by using modified wood powder and waste plastics. The method is characterized in that: (1) discarded agriculture and forestry wastes are crushed, milled and dried, and three different surface modification agents are added in sequence and mixed with the waste power one after another in a high-speed mixer to produce the modified water powder; and (2) waste plastics are washed and crushed into granules with the grain size of 2mm to 12mm and then dried; the modified waste powder, the waste plastic granules, a lubricant, a vesicant and a blowing promoter are mixed by weight percentage and put into the high-speed mixer for high-speed mixing and then cooled to the temperature lower than 55 DEG C for discharging so as to prepare a special premix. The composite material has super high strength and anti-bending and anti-impact capacity, wherein, the obvious enhancement of the anti-impact strength causes the great enhancement of the processing capacity of the product, thus causing products to meet different demands and ensuring an extremely wide application range.

Description

technical field [0001] The invention relates to the preparation technology of wood-plastic composite materials, in particular to a method for preparing wood-plastic composite materials by using modified wood powder and waste plastics. Background technique [0002] China is a country with few timber resources. With the rapid development of the national economy, the timber output cannot meet the needs of economic development at all, and the massive felling of timber has caused serious damage to the ecological environment. In order to protect forest resources, finding new materials to replace wood has become a research hotspot. Wood-plastic composite material is a new type of material formed by compounding plastic with wood, bamboo, straw and other lignocellulosic materials. It has the dual performance advantages of plastic and wood materials. The existing plants have a wide source, can be digested by the environment, and can be regenerated. It has the advantages of light weig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08K5/09C08K5/098C08J9/06
Inventor 陈登龙陈由强吴钦缘陈顺玉吕玮
Owner FUJIAN NORMAL UNIV
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