mica

We produce finest quality of Mica powder of following Mesh categories 20 40 60 80 100 160 200 300 325 400 600 800 1250 1500 2500 mesh The application in paints,coating industry (1)Barrier effect: Flake filler in paint form a basic parallel orientation arrangement, water and other corrosive substances, the penetration of the paint film by a strong barrier, in the use of high-quality mica circumstances (the chip radius to thickness ratio of at least 50 times, preferably 70 times), water and other corrosive substances penetrate the film to extend the penetration time is normally 3 times. As the mica filler is much cheaper than the special resin, it has a very high technological value and economic value. In short, using high-quality mica is an important means improving the anti-corrosion coatings and exterior wall coating’s quality and performance. In the coating process, the mica chips were to lie down under the surfaced tension before paint film curing, form parallel to each other automatically, and the structure that parallel to the surface of paint film. This arrangement of the layers, their orientation coincides with the corrosive substances penetrate perpendicular to the direction of film, the role played by blocking is the most adequate. The problem is the flaky mica structure must be perfect, foreign industrial enterprises slated standard is itself radius to thickness ratio should be at least 50 times, preferably more than 70 times, otherwise the results may also be desirable because the thinner the chip, the unit dosage of the filler the formation of the greater area of the effective barrier, on the contrary, the chip thick, then it can not form the number of barrier layers, while the loading of the filler particles are simply no such effect. Also, if there is perforated mica chip, tear, but also seriously affect this barrier role (corrosive substances that can leak past). Mica chips thinner, the unit volume of the formation of barrier filler larger the area, moderate size (not the pursuit of too small), the effect the better. (2) Improve the physical and mechanical properties of film: Using wet ground mica powder can improve a series of physical and mechanical properties of film. The key is the morphological characteristics of fillers, namely, sheet packing radius to thickness ratio and aspect ratio of fibrous filler, granular filler like the sand in concrete, play an enhanced role to the steel. (3)Improve the film anti-wear properties: Resin, the hardness of their own are limited, and many packing intensity is not high (eg, talcum powder). On the contrary, mica is one of the components of granite, its hardness and mechanical strength is great. Therefore, adding mica in the coatings as filler, its anti-wear performance can be significantly improved. Car paint, road paint, mechanical anti-corrosion coatings, wall coatings prefer to use mica, that is, with such logic. (4)Insulation: Mica has a very high resistance (1012-15 ohm cm), is in itself the best in the insulation material. With mica insulation to improve the film performance is well-known technology, and it will not say much more. Very interesting, it works with silicone resin or silicone resin composite material of boron encountered at high temperature into a good mechanical strength and insulating properties of ceramic substances, so using such insulation material made of wire , cable, even after the fire burned, still maintain their insulating state. It is important for the mines, tunnels, special buildings, special facilities, etc. (5)Flame Retardant: Mica is valuable fire-retardant fillers, if applied with an organic halogen flame retardant, can obtain flame-retardant and fire resistant paint. (6)UV, infrared properties: Mica has excellent shielding properties such as ultraviolet and infrared. So add the wet ground mica to the outdoor paint, can significantly enhance the film's anti-ultraviolet performance, slow down the aging film. the performance of infrared shielding is used in preparation of insulation, thermal insulation materials (such as paint). (7) reducing the settlement: Suspension performance of wet ground mica is very excellent, the thinnest small chips can be permanently suspended in a medium without hierarchical settlement. Therefore, instead of easy settlement with mica filler, the stability of coating storage increased significantly. (8) heat radiation and high temperature coatings: Mica has a good ability to infrared radiation, such as those with iron oxide, etc., can create excellent thermal radiation effects. The most typical example is the application of the spacecraft coatings (to the sunny side to reduce the temperature of tens of degrees). The paintings to many heated original, as well as high-temperature coating facilities, all need to use special paint containing mica. Such coatings can be at very high temperatures, such as the 1000 °C or so, at this time steel has been red-hot, but the paint unharmed. (9)gloss effect: Mica pearl of a good gloss, hence, when use large-size thin sheet mica products, can make materials such as paint to shine, flash, or reflective. On the contrary, very fine mica powder can make repeat and mutual reflection in the materials, coming into extinction effects, the use of small particle size of mica products generated when extinction effect. (10)Noise damping effect: Mica can significantly change the modulus of the material a series of physical modulus, form or alter the viscoelasticityof material. Such materials absorb vibration energy efficiency, weakening shock waves and sound waves. In addition, the shock waves and sound waves in the formation of repeated reflections between the mica chips, but also result in weakening the role of its energy. Wet ground mica also use to prepare silencer, sound insulation, damping coating.