Standard Thai Rubber (STR) Specification Scheme

 
Parameter SIR 3CV50 SIR 3L SIR 3WF SIR 5 SIR 10 SIR 20 SIR 20VK
Dirt (max) 0.02 0.02 0.05 0.08 0.08 0.16 0.16
Ash (max) 0.50 0.50 0.60 0.75 0.75 1.00 1.00
Nitrogen (max) 0.60 0.60 0.60 0.60 0.60 0.60 0.60
Volatile Matter (max) 0.80 0.50 0.80 0.80 0.80 0.80 0.80
Po (min) NA 35 30 NA 30 30 NA
PRI index (min) 60 60 60 50 50 40 40
Lovibond Color: individual value (max) NA 6.0 NA NA NA NA NA
Lovibond Color: range (max) NA 2.0 NA NA NA NA NA
Mooney Viscosity (ML, 1+4, 100°C) 50 +/- 5 NA NA 65 +7/-5 NA NA 65 +7/-5**

*Not specification status, but are controlled at the producer end.
**Note: Mooney Viscosity limits at time of production. Values will drift higher over time.