Diatomite is a kind of siliceous rock and a biogenic siliceous sedimentary rock. It is mainly composed of the remains of ancient diatoms. Its chemical composition is mainly SiO2, which can be expressed by SiO2 · nH2O, and its mineral composition is Opal and its variants. China's Diatomite reserves are 320 million tons, and the prospective reserves are more than 2 billion tons. It is mainly concentrated in East China and Northeast China, of which Jilin, Zhejiang, Yunnan, Shandong, Sichuan and other provinces have large scale and large reserves.

Plastic industry: living plastic products, building plastic products, agricultural plastics, window and door plastics, various plastic pipes, other light and heavy industrial plastic products. Advantages of using diatomite: excellent extensibility, high impact strength, tensile strength, tear strength, light and soft, good internal abrasion, good high-pressure strength and so on.