Polyolefin composite material and preparation method thereof

Abstract

The invention relates to a polyolefin composite material and a preparation method thereof. The raw material composition of the polyolefin composite material comprises polyolefin resin and additives. The preparation method comprises the following steps: (1) blending the polyolefin resin and the additives to obtain a mixture; and (2) heating the mixture in step (1) through microwaves to 160-280 DEGC for reaction for 3-600s under the microwave heating conditions of the microwave power being 50-8000W and the microwave frequency being 500-270000 MHz, thereby obtaining the polyolefin composite material. The method can effectively reduce the odor of the polyolefin composite material obtained by production, does not need to additionally add additives, does not change the original performance of the polyolefin composite material, and is simple, low in production cost and convenient for industrial application.

Description

technical field [0001] The invention relates to a polyolefin composite material, in particular to a polyolefin composite material and a preparation method thereof. Background technique [0002] Polyolefin composites are widely used in industries such as automobiles, home appliances and packaging. The modified and processed polyolefin composites can meet the requirements of normal use in all aspects of performance. However, during high-temperature processing and use of polyolefin composite materials, volatile substances containing some unpleasant odors or harmful to human health will be released to varying degrees, especially in closed environments such as automobiles. This problem It has attracted the attention of the government, major domestic and foreign manufacturers and resin manufacturers. Therefore, the technical development of low-odor polyolefin composite materials has practical significance for environmental protection. [0003] At present, there are three main m...

AI Technical Summary

Problems solved by technology

[0004] First, choose low-odor polyolefin resins and additives: When using low-odor polyolefin resins and additives, it is true that the odor of the material will be reduced to a certain extent, but in fact, the odor of the product is still relatively large and difficult to obtain. acceptance range;

[0005] Second, use vacuum extraction and baking: if a high vacuum is maintained during the extrusion granulation process, and the extruded particles are then baked at a high temperature, this method requires harsh processing conditions and high energy consumption, which is not conducive to large-scale continuous production;

[0006] Third, the use of odor absorbers: Add odor absorbers, such as aluminosilicate, activated carbon, porous silica, porous alumina, porous molecular sieves, during the production of polypropylene composites, and the products produced by this method are in the process of heating It is easy to cause odor overflow under certain conditions, and these odor absorbers are not compatible with polyolefin resins, which may cause long-term performance degradation of the material

[0007] In addition, there are some technologies that introduce supercritical carbon dioxide into the twin-screw extruder, or add anion powder and coupling agent to reduce the odor of polyolefin composite materials, but these methods will increase production costs and production difficulties

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