rubber compound for hose series

Rubber compound for rubber hose series 1.Inner layer rubber) Test Item) Test Results Hardness(Shore A) 75 Tensile Strength(MPa) 18 Elongation(%) 370 Heat aging resistance)(70°C×48h) Change in hardness)(Shore A) 2 Change in tensile) (%) -13 Change in elongation(%) -19 2.Outer layer rubber Test Item Test Results Hardness)(Shore A) 6 Tensile Strength)(MPa) 13 Elongation)(%) 440 Heat aging resistance)(70°C×48h) Change in hardness)(Shore A) 1 Change in tensile) (%) -19 Change in elongation)(%) -21 3.Middle layer rubber) Test Item Test Results Hardness)(Shore A) 70 Tensile Strength)(MPa) 16 Elongation)(%) 480 Heat aging resistance)(70°C×48h) Change in hardness)(Shore A) 2 Change in tensile) (%)-20 Change in elongation)(%)-16