Ribbed Smoked Sheet
Ribbed smoked Sheet (rss)
Ribbed Smoked Sheet (RSS) is a natural rubber produced by coagulating latex and processing it into sheets, which are then smoked for preservation. The quality of RSS is classified into different grades (3, 4, and 5) based on technical properties and visual inspection. Lower grades (e.g., RSS 4, RSS 5) have higher tolerances for impurities and defects, making them more economical but less consistent than higher grades.
Specification of Ribbed smoked Sheet (rss)
Rubber Quality Test Results
| TEST | RSS GRADE 3 | RSS GRADE 4 | RSS GRADE 5 | REFERENCES |
|---|---|---|---|---|
| Plasticity (Po) | 43 | 40 min | 35 min | ISO 2007 |
| Plasticity Retention Index (PRI) | 69 | 60 min | 50 min | ISO 2930 |
| Volatile Matter (%) | 0.43 | 0.8 max | 0.8 max | ISO 248-1 |
| Dirt Content (%) | 0.05 | 0.10 max | 0.20 max | ISO 249 |
| Ash Content (%) | 0.28 | 0.6 max | 0.75 max | ISO 247 |
| Nitrogen Content (%) | 0.34 | 0.6 max | 0.6 max | ISO 1656 |
| Visual Defects | Slight | Moderate | Significant* | MRB/Industry Standards |
Key Difference Summary
| Feature | RSS Grade 3 | RSS Grade 4 | RSS Grade 5 |
|---|---|---|---|
| Purity | Highest | Moderate | Lowest |
| Consistency | Very Uniform | Slightly Variable | Less Uniform |
| Price | Highest | Moderate | Lowest |
| End Uses | Precision products | Industrial goods | Low-cost commodities |