NE-5130 NE-5140 NE-5150 NE-5160 NE-5170 NE-5180 Appearance milky-white,light-yellow,light-gray Density g/cm3 1.09í+0.05 1.13í+0.05 1.15í+0.05 1.18í+0.05 1.21í+0.05 1.25í+0.05 Hardness Shore A Points 30í+3 40í+3 50í+3 60í+3 70í+3 80í+3 Tensile Strength MPaí¦ 5.0 6.0 7.0 7.0 6.5 6.0 Elongation at Breakage % í¦ 440 380 320 280 200 150 Tension Set % í_ 8 9 10 10 9 8 Tear Strength kN/m í¦ 15 16 18 18 16 15 First vulcanization condition for test piece: 175íµí-5min Vulcanizator: 80% DMDBH,quantity added 0.65% 20kg/box