Calorific electromagnetic shielding plastic-based composite material and preparation method thereof

Abstract

The invention discloses a heat-generating electromagnetic shielding plastic-based composite material, which is composed of the following raw materials in parts by mass: 40-70 parts of plastic matrix, 10-45 parts of ferrous metaferrite, 10-30 parts of Composite carbon black, 5-10 parts of compatibilizer, 0.5-1 part of lubricant, 0.5-1 part of antioxidant, described compatibilizer is POE-g-MAH, ABS-g-MAH A sort of. The composite material prepared by the invention has good mechanical properties and electromagnetic shielding properties, and the inner surface temperature is 60°C within 3-5 seconds under 60V voltage, the calorific value is controllable, the heating is faster, the electromagnetic shielding efficiency is high, the cost is low, and it is easy to form It can be processed and recycled, and can also meet the requirements of environmental protection, and realize the country's strategic deployment of building a resource-saving and environment-friendly society.

Description

technical field [0001] The invention relates to a heat-generating electromagnetic shielding plastic-based composite material and a preparation method thereof. Background technique [0002] With the development of the electronics industry, various household appliances, office appliances, instruments and equipment and other electronic products have been widely popularized and applied, bringing convenience to people and releasing a large amount of electromagnetic radiation, which is harmful to people's health. This electromagnetic shielding Composite materials can effectively suppress electromagnetic interference. At the same time, because of their light specific gravity, easy processing, corrosion resistance, and the characteristics of forming parts with complex structures, they can replace metal materials for the manufacture of electronic equipment housings. , computer system engineering and high-tech electromagnetic compatibility provide good means and guarantees, and also g...

AI Technical Summary

Problems solved by technology

[0003] The current plastic-based heating materials mainly form composite materials by adding conductive particles to the plastic matrix. When a voltage is applied to the composite material, since the composite material has a resistance R, when the current reaches a certain time, Q=I 2 Rt knows that it will emit a certain amount of heat. However, due to the dispersion of conductive particles, the current plastic-based heating composite materials have poor heating performance, which also leads to a certain impact on their mechanical properties.