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Wood plastic composite material and its preparation method and application

A technology of wood-plastic composite materials and plastics, applied in the field of plastic composite materials, can solve the problems of not providing data on physical and mechanical properties and processing performance of composite materials, and achieve improved production efficiency and application prospects, easy processing and molding, and high bending resistance intensity effect

Inactive Publication Date: 2005-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent does not provide data on the physical and mechanical properties and processing properties of the composite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix wood powder, waste plastics (recycled materials with a PP content of more than 80% by weight), processing aids, and compatibilizers in a high-speed stirrer according to the proportions. The mixing temperature is 100 ° C, and the high-speed stirring is carried out for 5 minutes. A part of the mixture was blended and granulated with ZSK-25 twin-screw extruder of German WP company. head temperature). The pellets are made into standard specimens by pressing method, and various mechanical properties tests are carried out. The other part of the mixture was extruded on a domestic twin-screw extruder, using a general-purpose mold to test the extrusion speed. The temperature of each section of the screw is 185 / 190 / 195 / 195°C, and the temperature of each section of the head is 185 / 185 / 1858 / 185°C. Current 16.3A, torque 66%, extrusion speed: 1700mm / min. If no processing aids are added, the speed is only about 1000mm / min, but with processing aids, the speed increases by 70%. ...

Embodiment 2～3

[0034] Except adding fly ash (average particle size: 100 μm) as a filler, other components and conditions are the same as in Example 1. After extrusion granulation, the granules are made into standard specimens by pressing method, and various mechanical properties are tested; at the same time, the extrusion speed is also tested by extrusion molding. The formula, test standards and results are shown in Table 1, and each component is in parts by weight.

[0035] It can be seen that with the addition of fly ash, the notched Izod impact strength of the material decreases slightly, while the flexural strength, flexural modulus and thermal deformation temperature are all increased.

Embodiment 4

[0037] Mix wood powder, waste plastics (recycled materials with a PE content of more than 80% by weight), processing aids, and compatibilizers in a high-speed stirrer according to the proportion, and the mixing temperature is 90 ° C. Stir at high speed for 5 minutes. Part of the mixture was blended and granulated with a ZSK-25 twin-screw extruder from German WP Company. head temperature). The pellets are made into standard specimens by pressing method, and various mechanical properties tests are carried out. The other part of the mixture was extruded on a domestic twin-screw extruder, using a general-purpose mold to test the extrusion speed. The temperature of each section of the screw is 135 / 140 / 145 / 148°C, and the temperature of each section of the head is 148 / 148 / 148 / 148°C. Current 15.2A, torque 63%, extrusion speed: 1320mm / min. If no compatibilizer is added, the speed is only about 800mm / min, but with the addition of processing aids, the speed is increased by 60%. The f...

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Abstract

A wood-plastics composition is prepared from used or waste plastics, wooden fibres for modifying plastics, and resin compatibilizer through fusing and proportionally mixing. Said resin compatibilizer is prepared from EVA, acrylic acid or acrylate and polyvinyl chloride through mixing. Its advantages are high strength toughness, and improved machinability.

Description

technical field [0001] The invention relates to a plastic composite material, in particular to a composite material blended with wood fiber and recycled plastic and a preparation method thereof. Background technique [0002] Wood-plastic composite materials can be widely used in packaging, construction and other industries. Compared with wood, they also have the advantages of easy processing, high strength, anti-corrosion, insect-proof, moisture-proof, long service life, and reusable. [0003] The use of wood fiber to fill modified plastics has been studied abroad. For example, the famous "Aiyin Wood" in Japan is this type of product, and the Canadian Xiede Company has also developed similar plastic wood products (molded by extrusion or pressing); Austrian Cincinnati Company and PPT Mold Company have also developed various board-plastic wood products. Domestic research on this has also been carried out. Tangshan Plastics Research Institute, National University of Defense Te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L97/02
Inventor 张国立胡孝义陈志达
Owner CHINA PETROLEUM & CHEM CORP
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