GB/T 3517-2014
AbolishedRubber, raw natural―Determination of plasticity retention index (PRI)
天然生胶 塑性保持率（PRI）的测定
Application Summary AI generated
This standard specifies the method for determining the Plasticity Retention Index (PRI) of raw natural rubber, which measures the rubber's resistance to oxidative aging by comparing its plasticity before and after accelerated heat aging. It is applied in the rubber industry for quality control and grading of natural rubber, particularly to assess its processing stability and suitability for products like tires, belts, and seals that require long-term durability. The test is essential for procurement and manufacturing to ensure consistent raw material performance in high-temperature or oxidative environments.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.