Kaolin is one of very important non-metal mineral resources used widely in papermaking, rubber and plastics manufacturing.
高岭土是一种重要的非金属矿产资源，广泛用于造纸、橡胶和塑料等方面。
2
Kaolin is an important non - metallic mineral resources and it can be used in papermaking, rubber, plastics and so on.
高岭土是一种重要的非金属矿产资源，可广泛用于造纸、橡胶、塑料等方面。
3
But, the densities of the inorganic minerals are higher than reinforce materials-carbon black, which heavy restricts the use of inorganic mineral materials in the rubber.