Compared with the non calcined kaolin calcined kaolin, calcined kaolin with reduced water content, silica and alumina content increased three, the activity increases, changes in the structure, the particle size is small and uniform, compared with non calcined kaolin filled NR rubber, vulcanized low temperature characteristic curve of calcined kaolin filled NR compound consistent. Shore A hardness constant, higher tensile strength, physical properties of both non transparent sole to sports shoes industry standards.
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