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Technical Specified Rubber (TSR):

TSR-L which is also known as block rubber is graded according to precise technical parameters such as dirt content, ash content, nitrogen content, volatile matter and properties of the rubber such as its Wallace Plasticity (PO) and its Plasticity Retention Index (PRI). Below you can find an overview of the specifications per grade per region.

Limits of TSR L grade Vietnam ISO Malaysia Thailand Indonesia
SVR 3L Test Method TSR L SMR L STR 5L SIR 3L
Dirt (max, %wt) 0.03 ISO 249:1995 0.05 0.02 0.04 0.03
Ash (max, %wt) 0.50 ISO 247:1990 0.60 0.50 0.40 0.50
Nitrogen (max, %wt) 0.60 ISO 1656:1996 0.60 0.60 0.60 0.60
Volatile matter (max, %wt) 0.80 ISO 248:1991 0.80 0.50 0.80 0.80
Initial Wallace plasticity (min) 35 ISO 2007:1991 30 35 35 30
Plasticity Retention Index (min) 60 ISO 2930:1995 60 60 60 75
Lovibond colour (max, indiv. value) 6.0 ISO 4660:1999 N/A 6.0 6.0 6.0

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For more information regarding the application(s) per grade. Please click here.