What's the function of mica powder?
The hardness of the resin itself is limited, and many filling strength is not high (such as talc). On the contrary, the mica is a component of granite, its hardness and mechanical strength. Therefore, the addition of ultrafine mica powder coating powder as a filler, it can significantly improve the antiwear properties of coating, coating, mechanical pavement. Anticorrosive paint, wall paint mostly use the mica powder in the car.
A series of physical and mechanical properties of ultra-fine mica powder can improve the film. The key is the morphological characteristics of filler, namely flake filler diameter thickness ratio and fibrous filler aspect ratio, particle filling as concrete sand, to enhance the role of steel.
The formation of flake filler basic arrangement of parallel orientation in the film, water and other corrosive substances on the film has a strong barrier, in the use of high-quality mica powder case (wafer diameter thickness ratio of at least 50 times, 70 times more than the best), water and other corrosive substances penetrate the film through time generally 3 times longer. Because the mica powder filler than special resin is much cheaper, so it has very high technical value and economic value.The use of high-quality mica powder is an important means to improve the anti-corrosion coatings and coatings for exterior wall quality and performance. In the process of painting and fine mica powder film by surface tension in the film before curing and lay down, automatically formed parallel to each other, but also with the film surface structure. The parallel layers are arranged such that its orientation just with corrosive substances penetrate the film perpendicular to the direction of the barrier function to play the most fully.
The mica has a high resistance, itself is the most excellent insulating materials. The formation of complexes with silicone resin or silicone resin boron, meet high temperature is converted into mechanical strength and insulating ceramic material with good performance, so this kind of insulated wire and cable material, even after burned in the fire, still remain the original state of the insulation. This is mine, tunnel, special buildings, special facilities, is very important.
