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。

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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。

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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.

但是，无机非金属矿物填料的密度均高于炭黑、白炭黑等补强材料的密度，这严重制约着无机矿物材料在橡胶中的使用。

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