Xinyang Dongan Insulation  Materials Co., Ltd.,which is also owner of  Xinyang Wanda New Material Co.,Ltd, is an integrated enterprise of ore mining, processing, production. Our main products are expanded perlite, Perlite sphere，vermiculite, flake graphite,mica and so on. In the course of 20 years of development, our company has always focus on customers' satisfaction, constantly improve quality and expand production scale.Now we have an annual output of 20,000 tons of hydrophobic expanded perlite, 10,000 tons of expanded vermiculite, 5,000 tons Filter aids, 30,000 square water-repellent insulation board capacity.120,000 tons of flake graphite.2000tons of mica. Our products widely used in construction, metallurgy, refrigeration, petroleum, electricity, chemicals, food and other sectors of insulation. We sold to more than 20 domestic provinces and regions, while exports to South Korea, Japan, Thailand, Vietnam and other countries, Chang-da and Dong-an are two renowned brands allover the world.