Table 4. Mechanical Properties of the NR Compounds according to Petroleum Resin Content
VDR-1
VDR-2
VDR-3
VDR-4
Hardness [Shore A]
74
73
68
65
Tensile strength [kgf/cm
2
]
240
236
230
228
Elongation [%]
450
530
540
570
Modulus at 100% [kgf/cm
2
]
38
29
25
22
Modulus at 300% [kgf/cm
2
]
165
132
120
100
Compression set [%]
30
32
34
40