ASTM D3474

Test Materials

ASTM D3474 specifies that the materials used in the torque testing process should include packaging containers such as bottle caps or closures. These materials should be standardized and meet the necessary requirements for uniformity, such as consistent dimensions and suitable surface characteristics for testing.

Test Process

The test involves applying a controlled torque to the closure using a torque tester, typically with a rotational force applied until the closure either engages or disengages. The torque is measured precisely to determine the strength and integrity of the closure’s sealing capabilities under specified conditions.

Test Result Interpretation

The results are interpreted based on the torque required to either open or break the seal of the closure. Higher torque values indicate stronger seals, while lower values may suggest weaknesses. These values should be compared against industry standards or product specifications to evaluate closure performance.