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 perl...