Mica powder is general name of white mica, sericite powder, phlogopite powder and other series. Sericite is a kind of fine-grained squamose muscovite with silky luster. It has a diameter-thickness ratio of > 80, proportion of 2.6-2.7, hardness of 2-3, and complete {001} cleavage. It can be split into super-thin squamose flakes which are flexible and bendable, with elastic modulus of 1505-2134MPa, tensile strength of 170-360MPa, shear strength of 215-302MPa, heat-resistance up to 600oC, and heat transfer rate of 0.419-0.670W. (mK) - 1. It has high acid and alkali resistances, strong electrical insulating property, and good abrasion and wear resistance. In addition, the chemical composition, structure, and configuration of sericite are similar to those of kaolin; therefore, sericite also has certain characteristics of clay minerals, such as, good suspension in aqueous medium and organic solvents, white granulocyte, good viscosity, and so on.

The sericite mine in Chuzhou of Anhui belongs to schist sericite deposit. The proven reserve in the area is tens of millions of tons. The main components of the ore are sericite (the content is up to 40-60%) and quartz. The mineral composite is relatively simple; the contents of Pb, As and other toxic elements are very low. It does not contain any radioactive elements, which can serve as eco-friendly materials.

Pulp ramming and stripping process: effectively protect the squamose structure, and create larger diameter- thickness ratio of products;

Cyclone desanding process: flotation enrichment, high purity of sericite;

Ultrafine stripping process: fine particles and controllable range;

De-ironing and bleaching process: fewer impurities, a substantial increase in whiteness.

Grea mica powder (sericite powder) is featured by high diameter-thickness ratio, high temperature resistance, acid and alkali resistance, and wear resistance, which is a kind of natural functional powder filler. The company carefully selects high-quality mica ore and makes use of unique wet-ground stripping and purification process. The cleavage mica lamellae is complete, which preserves the unique high diameter-thickness ratio structure (up to 100 or more) of mica, which has preeminent reinforcing effect for plastic products; in addition, it can bestow excellent dimensional stability for plastic products; the high temperature property of the product itself can also greatly improve the Vicat softening point of thermal deformation thermometers of plastics, which is suitable for parts and products under high-temperature working conditions; compared with glass fibers, mica are featured by smooth surface of products, non-warping or deformation and so on. The products are widely used in PP, PA, PBT, PET, and other plastic modification, functional masterbatch and plastics engineering applications.

"Grea" Mica Powder (sericite powder) is the first domestic new special functional filler, the applicable CCL industry technical requirements, alternative electronic grade microsilica given sheet ideal insulation resistance, rigidity, low thermal expansion, drillingThe hole machining, heat resistance and other properties and process stability. The material has completely chemically inert, not cracking deterioration or induced reaction even at high temperatures and complex system, in particular, has greatly improved drilling efficiency, borehole quality and reduce bit wear characteristics, is gradually becoming a popular material for CCL.

Functional contributions
1. High diameter-thickness ratio

• It can substantially increasing the tensile strength, flexural modulus and excellent dimensional stability of plastic materials; compared with glass fibers, mica are featured by smooth surface of products, non-warping or deformation and so on.

2. Chemically inertness

• The acid and alkali resistance can expand the using environment and the life of plastic products.

3. High-temperature resistance

• It can substantially improve the Vicat softening point of thermal deformation thermometers of plastics, as well as the heat resistance plastic products.

4. Superfine processing

• The impact strength is significantly improved, and thereby the toughness of plastic products is also increased.

5. National initiative

• The technical requirements of the applicable CCL industry can also be used in electronic appliances molding compound molding materials and the use of high-performance electronic components potting material.

6. Fluidization purification, superfine and Purifying Technology

• Fine granularity, good insulation, more stringent control of magnetic and impurities number of black spots.

7. Hardness 2-3, only the equivalent of 1/3 of the silica powder

• Can greatly improve drilling efficiency, borehole quality and reducing drill wear.

8. Unique nano-sheet structure

• Can greatly improve the strength of the material and dimensional stability, and significantly improved resistance to warpage and heat-resistant properties, especially for the CEM-3 CCL applications.