橡胶的路脊2

Product physical and chemical properties of rubber speed hump No Item Technical requirements A hardness of 70-85 2 Tensile strength, MPa) 9 3, elongation at break,% )250 4 300% modulus, MPa( 9 5 tear strength, KN / m( 20 6, elasticity,%20 7 Low temperature resistance temperature of 40 ° C ± 2 ° C, 8h, temperature, tensile strength retention of not less than 85% 8 240h salt spray resistance by salt spray resistance test, the product should not be discolored or eroded traces. 9 temperature thermal properties of the temperature 40 ° C ± 2 ° C, 90% -95% relative humidity, temperature 240h, the product should not be discolored or eroded traces of material are tensile strength of not less than 85% retention rate. Chemical solvent properties of 10 types of chemical solvents and chemicals by the specified time after the test, the product will not soften the surface, wrinkles, blistering, cracking, solvent immersion and other marks. Water 93 gasoline