ASTM D1646 is used to measure the Mooney viscosity of unvulcanized rubber, with key indicators including:

• Viscosity Stability – Evaluates the flowability and uniformity of rubber during processing.
• Shear Stability – Assesses performance stability under production conditions.

Applications

Rubber Formulation Design – Ensures stable flow properties of compounded rubber during processing.
Raw Rubber Testing – Screens viscosity characteristics of raw rubber for applications in tire and industrial rubber production.