Standard Thai Rubber 20 (S.T.R. 20) is the primary choice for manufacturers globally, representing a high-quality, technically specified natural rubber. Our premium grade S.T.R. 20 is meticulously processed to meet the stringent international technical specifications, ensuring superior performance and consistency for demanding applications.
Key Technical Specifications
Our S.T.R. 20 is guaranteed to meet or exceed the following typical industry standards (specifications available upon request):
Characteristic | Max. Limit (Guaranteed) |
Dirt Content (wt. %) | 0.20 |
Ash Content (wt. %) | 1.00 |
Nitrogen Content (wt. %) | 0.60 |
Volatile Matter (wt. %) | 0.80 |
Initial Plasticity ($P_o$) | 30 min. |
Plasticity Retention Index (PRI) | 60 min. |
Mooney Viscosity ($ML(1'+4')$ @ $100^{\circ}C$) | Controlled to batch-specific ranges |
Premium Grade Advantages
Exceptional Purity: Processed with advanced washing and drying techniques to achieve a dirt content consistently below the industry maximum of 0.20%, ensuring fewer defects in the final product.
Superior Processability (PRI): Our high Plasticity Retention Index (PRI) demonstrates the material's excellent resistance to degradation during processing, leading to more stable curing and consistent compound properties.
Consistent Quality Control: Each batch undergoes comprehensive testing in accredited laboratories to ensure tight control over key parameters like Mooney Viscosity and initial plasticity, guaranteeing uniformity across all shipments.
Recommended Applications
S.T.R. 20 is highly versatile and is the material of choice for applications where high strength, durability, and resistance to wear and tear are critical:
Tyre Manufacturing: Vehicle tires, retreads, and inner tubes.
Automotive Components: Engine mounts, bushings, and seals.
Infrastructure: Bridge bearings, construction pads, and anti-vibration mounts.
General Rubber Products: Hoses, conveyor belts, and molded goods.
Packaging and Logistics
Standard Weight: $33.33 \text{ kg}$ compressed bales (or per customer specification).
Packaging: Polyethylene wrap (thickness and melting point compliant with international standards).
Availability: Ready for prompt shipment from major Thai ports.
STR20
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