TSR 5 Natural Rubber Comparison Chart

Parameter Unit SIR 5 SMR 5* SMR GP STR 5* SVR 5
Dirt (max) % wt 0.05 0.05 0.08 0.04 0.05
Ash (max) % wt 0.50 0.60 0.75 0.60 0.50
Nitrogen (max) % wt 0.60 0.60 0.60 0.60 0.60
Volatile Matter (max) % wt 0.80 0.80 0.80 0.80 0.80
Po (min)   30 30 NA NA 30
PRI index (min)   70 60 50 60 60
Mooney Viscosity (ML, 1+4, 100°C)   NA NA 65 +7/-5 NA NA

*Two sub-grades of SMR 5 are SMR 5RSS (prepared by direct baling of ribbed smoked sheet) and SMR 5ADS (of air-dried sheet).