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Materials
Natural
Rubber
Specialty
NR Grades
Synthetic
Rubber
Carbon
Black
Titanium
Dioxide
Zinc
Oxide
|
TSR 20
Natural Rubber Comparison
Chart
| |
|
|
|
|
| Parameter |
Unit
|
SIR
20
|
SIR
20VK
|
SMR
20
|
SMR
20CV
|
STR
20
|
STR
20CV
|
SVR
20
|
|
Dirt (max)
|
% wt
|
0.20
|
0.20
|
0.16
|
0.16
|
0.16
|
0.16
|
0.16
|
|
Ash (max)
|
% wt
|
1.00
|
1.00
|
1.00
|
1.00
|
0.80
|
0.80
|
1.00
|
|
Nitrogen (max)
|
% wt
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
|
Volatile Matter
(max)
|
% wt
|
0.80
|
0.80
|
0.80
|
0.80
|
0.80
|
0.80
|
0.80
|
| Po (min) |
|
30
|
30
|
30
|
NA
|
30
|
NA
|
30
|
| PRI index
(min) |
|
50
|
50
|
40
|
40
|
40
|
40
|
40
|
Mooney
Viscosity
(ML, 1+4, 100°C) |
|
NA
|
60
+/- 5*
|
NA
|
65
+7/-5*
|
NA
|
65
+7/-5*
|
NA
|
*Not specification status, but are
controlled at the producer end.
These figures
are limits, not typical values. Typical values will vary
by producer.
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