| Sl.no |
Property |
Test Method |
Unit |
Natural Rubber |
| Spec. (Limit) 1040 M1 |
Spec. (Limit) 1050 M1 |
Spec. (Limit) 1060 M1 |
Spec. (Limit) 1070 M1 |
Spec. (Limit) 1080 M1 |
| 1 |
Hardness |
ASTM D 2240-97 |
Shore A |
40±5 |
50±5 |
60±5 |
70±5 |
80±5 |
| 2 |
Tensile Strength |
ASTM D412-98a |
Mpa |
25.0 Min |
23.0 Min |
23.5 Min |
20.0 Min |
19.0 Min |
| 3 |
Elongation @ Break |
ASTM D412-98a |
% |
750 Min |
650 Min |
650 Min |
575 Min |
750 Min |
| 4 |
Compression Set (70°C / 22h) |
ASTM D395-98 |
% |
20 Max |
20 Max |
20 Max |
20 Max |
20 Max |
| 5 |
Abrasion Loss |
ASTM D 5963 |
mm³ |
150 Min |
150 Min |
165 Min |
165 Min |
170 Min |
| 6 |
Tear Strength |
ASTM D 624 |
kN/m |
35 Min |
50 Min |
82 Min |
85 Min |
75 Min |
| 7 |
Aging Test (70°C / 72h)
|
ASTM D573-99 |
|
|
|
|
|
|
| 7a |
Hardness Change |
ASTM D2240-97 |
Shore A |
±5 Max |
±5 Max |
±5 Max |
±5 Max |
±5 Max |
| 7b |
Tensile Strength Change |
ASTM D412-98a |
% |
±10 Max |
±10 Max |
±10 Max |
±10 Max |
±10 Max |
| 7c |
Elongation @ Break Change |
ASTM D412-98a |
% |
±20 Max |
±20 Max |
±20 Max |
±20 Max |
±20 Max |
| 8 |
Specific Gravity |
ASTM D792 |
g/cm³ |
1.02 ±.05 |
1.06 ±.05 |
1.12 ±.05 |
1.17 ±.05 |
1.19 ±.05 |
| 9 |
Resilience |
ASTM D7121 |
% |
60 Min |
55 Min |
40 Min |
35 Min |
20 Min |
| 10 |
Ash Content |
ASTM D4574 |
% |
8 Max |
8 Max |
8 Max |
8.5 Max |
8.7 Max |
| Rheological Properties |
| Temperature |
150° C Time: 12Min |
150° C Time: 12Min |
150° C Time: 12Min |
150° C Time: 12Min |
150° C Time: 12Min |
| ML (lb -in) |
0.217 |
0.348 |
0.466 |
0.714 |
1.178 |
| MH (lb -in) |
1.68 |
3.626 |
2.695 |
5.686 |
7.603 |
| TS2 (M) |
0:56 |
2:06 |
2:28 |
2:33 |
2:05 |
| TC90 (M) |
2:58 |
4:12 |
3:59 |
6:02 |
4:59 |
| *Working temperature.: -50 °C up to 70 °C |
| *Good weather Resistance |
| *High Resilience and Tensile Strength |
| *Good Abrasion Resistance |
