China Powder Network News Talc is the filler for plastics after calcium carbonate. It is used in more than 200,000 tons of plastics every year, and as some of the physical and chemical properties of talc have been further deepened awareness, its scope and number of applications are increasing rapidly. 1) Use silicon-containing minerals as agricultural film insulation agents, such as mica, kaolin and talc, which have a blocking and shielding effect on infrared rays. Adding an appropriate amount of this mineral powder to the agricultural greenhouse film can improve the barrier properties of the plastic film against infrared rays, thereby reducing the loss of heat inside the greenhouse to the outside of the greenhouse in the form of infrared radiation at night and improving the insulation of the greenhouse. The research results of the Light Industry Plastics Processing and Application Research Institute in the early 1990s showed that: ①The filling amounts of mica powder, kaolin, talc pow...