Long Stone Industry Co.,Ltd, is a manufacturer specialize in producing mica powder, vermiculite, and quartz powder,expanded vermiculite and so on.used in improving the optical characteristics of plastic,the gas-tight plastic,the Physical & mechanical properties of the plastic. Mica has high resistance and high insulation material. Mica material used to improve the insulating properties is a well-known technology. For example manufacturing high insulation plastic products, you may consider adding the wet grounded. As noted above, a high iron content of less mica insulation should be avoided. No washing of mica powder, iron content is generally high, and this kind of mica powder should be avoided to use.vermiculite is a kind of mineral layered containing magnesium aluminum silicate water secondary metamorphic, regularly made by the black (golden) mica after hydrothermal alteration and weathering. As presented in bending because of heat expansion after loss water, like leech, so that called vermiculite. classified by the staged representation, primary mineral of vermiculite and expanded vermiculite. by the color: golden, silver(ivory), vermiculite has heat insulation, cold-resistant, antibacterial, fire, water absorption, sound absorption properties. Under 800 ~ 1000 ??? baking 0.5 ~ 1.0 minutes, the volume can be increased rapidly from 8 to 15 times, up to 30 times. Color changes into gold or silver, producing a loose texture of the expanded vermiculite, but no acid endurance, and has poor dielectric property.