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Foamed wood plastic composite material and its preparation method

A composite material and foamed wood technology, applied in the field of foamed wood-plastic composite materials, can solve the problems of poor impact resistance, easy to have pitting, affecting performance, etc., and achieve the effect of good impact resistance and good combination.

Inactive Publication Date: 2012-05-23
孙天凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the main problems of wood-plastic composite materials are: first, poor toughness and poor impact resistance;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of foamed wood-plastic composite material, it is made with the raw material of following weight ratio: 53 parts of wood flour, 20 parts of polypropylene, 25 parts of polyethylene, 5 parts of ethylene-acrylate, 2 parts of sodium bicarbonate, 5 parts petroleum resin.

[0015] The preparation method of the foamed wood-plastic composite material:

[0016] (1) Preheating the wood powder at 40°C;

[0017] (2) Mix and stir polypropylene, polyethylene, ethylene-acrylate, and petroleum resin evenly at 30°C;

[0018] (3) Add the preheated wood powder in batches to the mixture of step (2) in stirring, continue to stir for 20 minutes after adding, then add sodium bicarbonate, continue to stir for 20 minutes, and add to the molding machine for preliminary compression;

[0019] (4) The preliminarily pressed blank is cooled to room temperature, and pressed again.

Embodiment 2

[0021] A kind of foamed wood-plastic composite material, it is made with the raw material of following weight ratio: 60 parts of wood flour, 30 parts of polypropylene, 20 parts of polyethylene, 8 parts of ethylene-acrylate, 6 parts of sodium bicarbonate, 5 parts petroleum resin.

[0022] The preparation method of the foamed wood-plastic composite material:

[0023] (1) Preheating the wood powder at 50°C;

[0024] (2) Mix and stir polypropylene, polyethylene, ethylene-acrylate and petroleum resin evenly at 40°C;

[0025] (3) Add the preheated wood powder in batches to the mixture of step (2) in stirring, continue to stir for 30 minutes after adding, then add sodium bicarbonate, continue to stir for 10 minutes, and add to the molding machine for preliminary compression;

[0026] (4) The preliminarily pressed blank is cooled to room temperature, and pressed again.

Embodiment 3

[0028] A kind of foamed wood-plastic composite material, it is made with the raw material of following weight ratio: 60 parts of wood flour, 30 parts of polypropylene, 25 parts of polyethylene, 5 parts of ethylene-acrylate, 3 parts of sodium bicarbonate, 5 parts petroleum resin.

[0029] The preparation method of the foamed wood-plastic composite material:

[0030] (1) Preheating the wood powder at 50°C;

[0031] (2) Mix and stir polypropylene, polyethylene, ethylene-acrylate and petroleum resin evenly at 40°C;

[0032] (3) Add the preheated wood powder in batches to the mixture of step (2) in stirring, continue to stir for 20 minutes after adding, then add sodium bicarbonate, continue to stir for 20 minutes, and add to the molding machine for preliminary compression;

[0033] (4) The preliminarily pressed blank is cooled to room temperature, and pressed again.

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PUM

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Abstract

The invention relates to a foamed wood plastic composite material and its preparation method, the foamed wood plastic composite material comprises the following raw materials by weight proportion: 50-60 parts of wood powder, 20-30 parts of polypropylene, 20-25 parts of polyethylene, 5-8 parts of ethane-acrylate, 2-6 parts of sodium bicarbonate and 3-5 parts of petroleum resin. The foamed wood plastic composite material has the advantages that wood powder enables good combination with a polymer, no bubbles and no pitting are generated after heating, the shock resistance is good and the number of the low temperature drop hammer impact fracture is zero.

Description

technical field [0001] The invention relates to a foamed wood-plastic composite material. Background technique [0002] Wood-plastic composites (Wood-Plastic Composites, WPC) is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride, etc. Wood flour, rice husk, straw and other waste plant fibers are mixed into new wood materials, and then processed by extrusion, molding, injection molding and other plastic processing techniques to produce boards or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. The board formed by hot extrusion after mixing plastic and wood powder in a certain proportion is called extruded wood-plastic composite board. [0003] However, the main problems of wood-plastic composite materials are: first, poor toughness and poor impact resistance, and second, insufficient contact between wood powder a...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/12C08L23/06C08L23/08C08L33/04C08L57/02C08J9/08
Inventor 孙天凯
Owner 孙天凯
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