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Materials
Natural
Rubber
Specialty
NR Grades
Synthetic
Rubber
Carbon
Black
Titanium
Dioxide
Zinc
Oxide
|
Standard Malaysian Rubber
(SMR)
Specification Scheme
| |
|
|
|
|
|
| Parameter |
Unit
|
SMR
CV50
|
SMR
CV60
|
SMR
L
|
SMR
5*
|
SMR
GP
|
SMR
10
|
SMR
10CV
|
SMR
20
|
SMR
20CV
|
|
Dirt (max)
|
% wt
|
0.02
|
0.02
|
0.02
|
0.05
|
0.08
|
0.08
|
0.08
|
0.16
|
0.16
|
|
Ash (max)
|
% wt
|
0.50
|
0.50
|
0.50
|
0.60
|
0.75
|
0.75
|
0.75
|
1.00
|
1.00
|
|
Nitrogen (max)
|
% wt
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
0.60
|
|
Volatile Matter
(max)
|
% wt
|
0.80
|
0.80
|
0.50
|
0.80
|
0.80
|
0.80
|
0.80
|
0.80
|
0.80
|
| Po (min) |
%
wt |
NA
|
NA
|
35
|
30
|
NA
|
30
|
NA
|
30
|
NA
|
| PRI index
(min) |
|
60
|
60
|
60
|
60
|
50
|
50
|
50
|
40
|
40
|
Lovibond
Color:
individual value (max) |
|
NA
|
NA
|
6.0
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
Lovibond
Color:
range (max) |
|
NA
|
NA
|
2.0
|
NA
|
NA
|
NA
|
NA
|
NA
|
NA
|
Mooney
Viscosity
(ML, 1+4, 100°C) |
|
50
+/- 5
|
60
+/- 5
|
NA
|
NA
|
65
+7/-5
|
NA
|
60
+7/-5**
|
NA
|
65
+7/-5**
|
*Note: Two sub-grades
of SMR 5 are SMR 5RSS (prepared by direct baling of ribbed
smoked sheet) and SMR 5ADS (of air-dried sheet).
**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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