Malaysian Rubber Council
Standard Malaysian Rubber
Technically specified dry rubber in bale form, graded to ISO 2000
Feedstock
SMR grades give tyre rooms, belt plants and general moulders a dry rubber that arrives with a specification rather than an estimate. The common grades are SMR 10 and SMR 20 for general moulding, SMR CV50 for consistent-viscosity work, and SMR 5 where low dirt is essential.
Each pallet is marked with the grade, the processing factory and the production week. Buyers who need compound consistency across a twelve-month programme usually pair SMR CV50 with a fixed factory allocation, which removes the viscosity drift that comes from switching between sources.
Typical applications
- Tyre tread, sidewall and retread compounds
- Conveyor belting and transmission belts
- Engine mounts, bushes and antivibration parts
- Hoses, gaskets and industrial mouldings
- Footwear soling and general mechanical goods
Specification
Standard Malaysian Rubber: tolerances and packing
Figures below are typical production limits. Confirm the revision on the factory certificate before a tender is submitted.
| Grades supplied | SMR 5, SMR 10, SMR 20, SMR CV50 |
|---|---|
| Dirt content | 0.10% (SMR 10 / CV50); 0.16% (SMR 20) |
| Ash content | 0.75% maximum (SMR 10); 1.00% maximum (SMR 20) |
| Nitrogen content | 0.60% maximum |
| Volatile matter | 0.80% maximum |
| Mooney viscosity ML(1+4) at 100 C | 60 to 70 for CV grades |
| Plasticity retention index | 50 minimum |
| Bale weight | 33.3 kg, wrapped in polyethylene film |
| Pallet | 30 bales, approximately 1 tonne, shrink-wrapped |
| Reference standards | ISO 2000, ASTM D2227 |
Packing and handling. Bales are compression-packed on hardwood or plastic pallets. Container loading is normally 20 tonnes per 20-foot unit, with moisture-absorbing liners available for long sea transit.
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