What is magnesium high crystal air duct? What are the characteristics?

Glass fiber reinforced plastic duct is made of magnesium oxychloride, which has unstable performance and its quality is affected by raw materials and human factors. Magnesium high crystallization air duct is a patented product developed by Hunan Dachuan Company, which contains no chloride ion. It is the product of magnesium sulfate and magnesium phosphate fully crystallized with magnesium oxide, and its molecular structure is fully combined with hexagonal star needle, so it is called magnesium high crystallization composite material.