Method of preparing wood-plastic composite material with modified wood powder and waste plastic

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 interface compatibility, low polarity of blends, etc., and achieve broad market application Prospects, low equipment requirements, and simple preparation process

Inactive Publication Date: 2016-03-23
QUANZHOU NAISI MATERIAL TECH
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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] Clean and crush the recycled plastics of PVC and PE with a weight ratio of 1:1 into pellets with a particle size of 10mm, dry them to make their moisture content ≤ 2%, and take 450 grams for later use.

[0028] Get the mixture of 500 grams of the above-mentioned standby modified wood powder and 450 grams of waste plastic particles and 15 grams of lubricant stearic acid, 15 grams of foaming agent sodium bicarbonate and 20 grams of foaming agent zinc oxide and add it to a high-speed mixer. Mix at ...

Embodiment 2

[0031] The waste moso bamboo is cleaned, crushed, and then ground into bamboo powder with a fineness of 100 mesh with a mill, and dried at 130°C to make the water content ≤ 2%. Take 600 grams of dried bamboo powder, then add 12 grams of titanate coupling agent, 18 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] Clean and crush the recycled plastics of PVC and PP with a weight ratio of 1:1 into pellets with a particle size of 12mm, dry them to make their moisture content ≤ 2%, and take 350 grams for use.

[0033] Take 600 grams of the above-mentioned spare modified moso bamboo powder, 350 grams of waste plastic granule powder, 20 grams of strontium stearate lubricant, 20 grams of foaming agent toluenesulfonylsemicarbazide, 10 grams of zinc carbonate as ...

Embodiment 3

[0036] Clean the peanut shells, crush them, and 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 peanut shell powder, then add 25 grams of styrene-maleic anhydride copolymer, 15 grams of aluminate coupling agent, and 20 grams of vinyl ethoxysilane coupling agent one by one at high speed. Mix with peanut shell powder in a mixer for 20 minutes and discharge to obtain modified peanut shell powder for later 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 600 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 35 gram...

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Abstract

The invention relates to a preparation technology of wood-plastic composite materials and particularly relates to a method of preparing a wood-plastic composite material with modified wood powder and waste plastic. The method includes the steps of (1) crushing, milling and drying agricultural and forestry wastes, successively adding three different surface modifiers and successively mixing the surface modifiers with the waste powder in a high-speed mixing machine to prepare a modified waste powder; (2) cleaning the waste plastic, crushing the waste plastic into granules being 2-12 mm in size, and drying the granules; and (3) according to weight percentage ratio, feeding a mixture composed of the modified waste powder, the waste plastic granules, a lubricant, a foamer and a foamer aid into the high-speed mixing machine to perform high-speed mixing, cooling the mixture until the temperature is lower than 55 DEG C and discharging the material to prepare a special premix. The composite material is very high in strength and anti-bending and anti-impact performance, wherein the anti-impact strength is significantly improved so that the composite material is greatly improved in processability, and further can be used for producing products satisfying different demands. The composite material is greatly wide in 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 production cannot meet the needs of economic development, 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 weight,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L27/06C08L23/06C08L51/06C08L9/02C08L23/12C08L23/08C08L35/06C08K5/29C08K5/09C08K3/22C08K13/02C08K5/10C08K5/544C08K3/26C08K5/5425C08J9/08C08J9/10
CPCC08L97/02C08J9/08C08J9/103C08J9/105C08J2203/02C08J2203/04C08J2397/02C08J2427/06C08L2203/14C08L2205/025C08L2205/035
Inventor 陈昕雄
Owner QUANZHOU NAISI MATERIAL TECH
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