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PS 2058-2026
Active
Rubber, raw natural — Determination of plasticity retention index (PRI)
Committee:
Plastics
Sector:
Chemicals and Petroleum
Available Standards
Original Standard
إنجليزي (English)
16
Page
2026
International Classification for Standards (ICS)
| Code | Classification |
|---|---|
| 83.040.10 | Latex and raw rubber |
Adopted Standards
| Standards / Amendment / Corrigendum | |
|---|---|
| 1 | ISO 2930:2024 |
Replacement Sequence
| Replaces |
|---|
| PS 2058-2010 |
Scope
This document specifies a method to determine the plasticity retention index (PRI) of raw natural rubber.
The PRI is a measure of the resistance of raw natural rubber to thermal oxidation. A high resistance to thermal oxidation is shown as a high value of the index. PRI is not an absolute value and cannot give an absolute classification of plasticity number of different natural rubber after oxidation