Formula and method for preparing polyvinyl chloride based wood-plastic composite material

A technology of wood-plastic composite materials and polyvinyl chloride, which is applied in the field of polymer processing, can solve the problems of polyvinyl chloride performance degradation, wood-plastic material performance deterioration, and poor molding and processing performance, and achieve impact resistance and strength improvement. The effect of strong resistance and good cold resistance

Inactive Publication Date: 2010-08-04
山东三惠木塑科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some wood-plastic composite materials are produced based on polyvinyl chloride thermoplastics, such as: CN200810077149.0 patent, this kind of wood-plastic materials, due to the inherent poor cold resistance and low impact strength of polyvinyl chlor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Clean 20-mesh waste polyvinyl chloride particles and dry them in a blast drying oven at 100°C;

[0028] 2. Dry the 80-mesh wood powder in a blast drying oven at 100°C to reduce the moisture content to below 2%;

[0029] 3. Raw material components are weighed and prepared according to weight:

[0030] 26 parts of old polyvinyl chloride particles

[0031] Poplar powder 56 parts

[0032] Carboxylated nitrile rubber 5 parts

[0033] Powdered nitrile rubber 2 parts

[0034] 2 parts tribasic lead sulfate

[0035] 1 part polyester wax

[0036] 1 part isocyanate

[0037] 4. Put the raw materials prepared according to the formula into a high-speed mixer and stir for 15-20 minutes, and the mixing temperature is 100°C-150°C;

[0038] 5. Put the mixed raw materials in step 4 into the twin-screw extruder for mixing and extrusion. The barrel temperature is 130°C, the head temperature is 180°C, and the extruder host speed is 60 rpm. The speed of the machine is 6 rpm, and th...

Embodiment 2

[0042] Weigh stock preparation by following component content, repeat the method for embodiment 1.

[0043] 30 parts of old polyvinyl chloride granules

[0044] Wood powder 60 parts

[0045] Carboxylated nitrile rubber 6 parts

[0046] Powdered nitrile rubber 3 parts

[0047] 2 parts lead dibasic phosphite

[0048] 2 parts polyester wax

[0049] Aluminate 2 parts

[0050] After testing, the properties of polyvinyl chloride-based wood-plastic composite materials are: tensile strength is 28.10MPa, elongation at break is 3.41%, and impact strength (18°C) is 6.6KJ / m 2 , Low temperature impact strength (-18°C) is 3.1KJ / m 2 .

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Abstract

The invention relates to a formula and a method for preparing a polyvinyl chloride based wood-plastic composite material. The method comprises the following steps of: adding raw materials prepared according to the formula such as waste polyvinyl chloride granules, wood flour, carboxylated nitrile rubber, powdered nitrile rubber, a compound stabilizer, a lubricant and a flow modifier into a high-speed mixer, and stirring the raw materials for 15 to 20 minutes, wherein the mixing temperature is between 100 and 150 DEG C; adding the mixed raw materials into an extruding machine to perform extrusion, wherein the rotating speed of a main engine of the extruding machine is 40 to 60 revolutions per minute, and the rotating speed of a feeding machine is 4 to 6 revolutions per minute; and performing shaping after the extrusion. The polyvinyl chloride raw material adopted by the formula and the method is waste polyvinyl chloride, and the wood flour is worthless poplar wood flour, miscellaneous tree powder or crop straw powder, and is low in price, saves energy sources and protects the environment.

Description

technical field [0001] The invention relates to a preparation formula and method of a polyvinyl chloride (PVC)-based wood-plastic composite material. The prepared composite material can be used for flooring, guardrails, decorative materials and the like. The invention belongs to the technical field of polymer processing. Background technique [0002] Wood-plastic composite material is a new type of composite material prepared by mixing and processing thermoplastics as the main raw material, adding wood powder, bamboo powder, fruit shell powder, straw powder, rice bran powder or peanut shell powder. The successful development of this material has alleviated the shortage of resources and energy caused by the increasing demand for petroleum resources and wood and forest products. It is an effective means of protecting the environment and saving energy. Good dimensional stability, easy molding, low water absorption, corrosion resistance and recyclability, so it has become a hot...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L27/06C08L9/02C08L15/00C08L67/00C08K3/30C08K5/29C08K3/32C08K5/11
Inventor 何正兴丁正泉邰锡峰
Owner 山东三惠木塑科技股份有限公司
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