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Double-layer plastic-wood composite material and preparation method thereof

A wood-plastic composite material, double-layer technology, applied in the field of double-layer wood-plastic composite materials, double-layer wood-plastic composite materials, can solve the problems of insufficient recycling of waste plastic materials, shortage of wood resources, etc., and achieve significant environmental protection Benefits, the effect of alleviating white pollution

Inactive Publication Date: 2008-04-30
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-layer plastic-wood composite material to solve the problems of increasing shortage of existing wood resources and insufficient recycling and reuse of waste wood, crop straw, and waste plastic materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1, raw material preparation:

[0030] The raw materials used are dried first, and the moisture content of sawdust and high-grade pine wood powder is required to be no more than 3% after drying;

[0031] a. Inner layer core raw material: the main material weighs 60% of sawdust by weight percentage, 40% of waste polyethylene plastic, and the total is 100%; the maleic anhydride MA weighed in addition is 1.0% of the total weight of the main material, hard Zinc fatty acid is 0.5% of the total weight of the main material. First add 60% sawdust to 1.0% maleic anhydride MA, treat it in a mixer for 15 minutes, carry out surface treatment, and then process it into a 10-mesh mixed coarse powder; sort, clean, and broken;

[0032] b, outer material: the main material is 30% of 80 purpose high-grade pine wood powder weighed by weight percentage, and the new polyvinyl chloride plastic is 70%, 100% in total; the maleic anhydride MA weighed in addition is the total amount of main...

Embodiment 2

[0040] Step 1, raw material preparation:

[0041] Dry the raw materials first, and the moisture content of wheat straw powder or high-grade poplar wood powder should not exceed 3% after drying;

[0042] a. Inner layer core material: the main material is 75% of wheat straw powder and 25% of waste polypropylene plastic by weight percentage, and the total is 100%; the maleic anhydride MA weighed in addition is 1.5% of the total weight of the main material , Zinc stearate is 3.5% of the total weight of the main body material. Add 75% wheat straw powder to 1.5% maleic anhydride MA for surface treatment, and then process it into 30-mesh mixed coarse powder; sort, clean and crush 25% waste polypropylene plastic;

[0043] b, outer material: the main material is 50% of the high-grade poplar wood powder weighing 100 meshes by weight percentage, and the polypropylene plastic of new product is 50%, and the total is 100%; the maleic anhydride MA weighed in addition is the main material gr...

Embodiment 3

[0051] Step 1, raw material preparation:

[0052] Firstly, the raw materials used are dried, and the moisture content of cotton stalk powder or high-grade poplar wood powder is required to be no more than 3% after drying;

[0053] a. Inner layer core material: the main material is 70% of cotton stalk powder and 30% of waste polyvinyl chloride plastic, 100% in total; the other weighed polyethylene MAPE is 5.0% of the total weight of the main material , Zinc stearate is 2.5% of the total weight of the main body material. First add 70% cotton stalk powder to 5.0% polyethylene MAPE for surface treatment, and then process it into 20-mesh mixed coarse powder; sort, clean and crush 30% waste PVC plastic;

[0054] b. Outer layer raw materials: the main material weighs 40% of the 90-mesh high-grade poplar wood powder by weight percentage, and the new polypropylene plastic is 60%, and the total is 100%; in addition, the added polyethylene MAPE is weighed as 40% of the total weight of t...

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Abstract

The invention discloses a two-level wood-plastic composite material and process for preparation. An inner core body of the composite material is compounded by coarse wood flour or agricultural straw powder and waste plastics. According to the percentage by weight, the coarse wood flour or the agricultural straw powder is 60-75%, and the waste plastic is 25-40%. When being combined, added coupling agent is additionally weighed and is 1-5% of the gross weight of main body materials, and lubricating agent is 0.5-5%. An outer layer is compounded by pure wood floor and novel plastic. According to the percentage by weight, the pure wood floor is 30-50%, and the novel plastic is 50-70%. When being combined, the added coupling agent is additionally weighed and is 1-5% of the gross weight of the main body materials, functional auxiliary agent is 1-5%, lubricating agent is 0.5-5%, and the thickness of the outer layer is equal or more than 3 millimeters. The process for preparing the composite material has the steps of raw material preparation, mixing granulation, extrusion molding, shaping, cooling, pulling, cutting and the like. The two-level wood-plastic composite material of the invention has the advantages of wood property and plastics property.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a double-layer plastic-wood composite material and a manufacturing method of the double-layer plastic-wood composite material. Background technique [0002] With the continuous development of my country's modernization and the continuous improvement of people's living standards, the demand for timber is increasing day by day. The resulting over-harvesting has made vegetation resources increasingly tense and caused serious environmental problems. On the other hand, plastic products are widely used, but the waste recycling system is not perfect, and the "white pollution" caused by many people's lack of environmental awareness has become an urgent problem in environmental protection. [0003] In this context, wood-plastic composite materials came into being. Wood-plastic composite materials are made of wood powder and agricultural straw powder filled with thermoplastics (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/00B27N3/28B27N1/02
Inventor 赵麦群吕仁惠吕娟王秀春
Owner XIAN UNIV OF TECH
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