Product description, Product introduction: Bentonite is clay rock with the main minerals of montmorillonite, it belongs to the aquifer shape aluminum silicate minerals. Physical properties of bentonite: Mohs Scale Hardness is from 2 to 2.5,density is 2.6 g/cm3 ,and the color is white or light yellow.Bentonite is characterized by the natures of strong hygroscopicity, decentralization, suspension, certain viscosity, Thixotropy and lubricity, and strong cation exchange capacity.Bentonite is used in Brake pad Drum brake or clutch, The recommended regular consumption of kaolin is from 2% to 8%. The character of bentonite: Bentonite is of oil luster, waxy luster, earthy luster. The fracture is of shells or dentate shape.Sodium base bentonite is dense clumps commoly, calcium base bentonite is loose earthy commonly, the surface has smooth feeling, relative density is 2- 3.Bentonite has strong hygroscopicity, the biggest water quantity is 8 to 15 times of its volume, it will expansion from several times to thirty times after water absorption.Bentonite has High plasticity and good cohesiveness. The main chemical ingredients of Bentonite are K,Na,Ca, etc., and these ingredients often exist in different content in bentonite. The Na2O and CaO content directly affects the physical and chemical properties of bentonite.Sodium base bentonite has better expansibility and cohesiveness than that of calcium base bentonite.To meet many application needs,it need to change bentonite base to improve the technical performance of bentonite. Because the variety of excellent performance, bentonite can be used as binder, Filler, catalyst, stabilizer, plasticizer and thickener etc..Bentonite can be used as filler in friction material to reduce cost. Property: A1203: 18% min SiO2: 56% min Na2O+K2O: 2%-3% PH: 8.5-10.6 expansion coefficient: 20times-30times grade: 200mesh,325mesh sieving rate: 97%