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Wood plastic micro foaming composite material and its processing shaping method

A composite material and micro-foaming technology, which is applied in the field of wood-plastic micro-foaming composite material and its processing and molding, and achieves the effects of low density, environmental protection, and extensive recycling.

Inactive Publication Date: 2007-04-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention solves the technical problems such as the processing fluidity of plastic and industrial waste sanding powder mixed extrusion foaming, and provides a wood-plastic micro-foaming composite material with low density and high impact resistance. At the same time, the process method of the invention It can process foamed pellets, and can flexibly process and shape various wood-plastic foamed products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Micro-foamed wood-plastic composites are composed of the following raw materials by mass percentage:

[0035] 100 parts polyvinyl chloride

[0036] Sanding powder 30 parts

[0037] AC (foaming agent) 1.5 parts

[0038] Heat stabilizer 5.0 parts

[0039] 1.8 parts of plasticizer

[0040] Lubricant 1.5 parts

[0041] Foaming aid 5.0 parts

[0042] 2.0 parts of coupling agent

[0043] a. Add polyvinyl chloride resin powder and 100-mesh sanding powder (commercially available industrial products) into SRL-Z200 / 500 high-speed mixer for hot mixing, mix for 5 minutes, weigh heat stabilizer, lubricant, Processing aids such as plasticizers and stabilizers are mixed according to the ratio of tribasic lead sulfate: dibasic lead phosphite: lead stearate: barium stearate = 3.0: 2.0: 1.0: 1.0, and added to the mixer , the mixing temperature was 110°C, and the mixing time was 10 minutes. Put the uniformly mixed hot material into the cold mixer and mix it to 40°C; then add the f...

Embodiment 2

[0046] Embodiment 2, embodiment 3, embodiment 4: process step is the same as embodiment 1, and each component is as table 1:

[0047] Example 2

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PUM

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Abstract

This invention relates to a wood plastic micro-foam composite and its processing and shaping technology, mainly including various kinds of processing accessory ingredient, such as: polyvinyl chloride resin, sanding powder, chemistry(AC) blowing agent, plasticizer, assistant blowing agent and so on, mixing uniformly in high speed mixer, extrude palletizing in single screw extruder or twin screw extruder, prepared particles form a kind of continuous uniform wood plastic micro-foam composite through single, twin screw extruder and foaming tooting, it can efficiently overcome the flaw of large density and low impact strength of common wood plastic composite. This invention provides broader reuse way for solving many industrial waste sanding powder or wood powder, can extensively process and form indoor and outdoor decoration, building doors, window products and so on.

Description

technical field [0001] The invention relates to a wood-plastic micro-foaming composite material and a processing and molding method thereof. Background technique [0002] Wood-plastic composite materials have the dual characteristics of wood and plastic. The product is not afraid of moths, no fungus, strong acid and alkali resistance, no moisture absorption, not easy to deform, good mechanical properties, and is also an environmentally friendly material. The raw materials are cheap and abundant, and can be recycled. . However, compared with unfilled plastics, wood-plastic composite products have a higher modulus of wood fibers, which increases the brittleness of the composite and lower impact stress resistance. The above-mentioned shortcomings can be effectively overcome by creating a bubble structure in the composite material through a continuous extrusion foaming process. Chinese patent 02157949.0 discloses a wood-plastic micro-foaming composite material and its processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/23C08J9/22
Inventor 薛平丁筠贾明印
Owner BEIJING UNIV OF CHEM TECH
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