ASTM D2659

Test Materials: ASTM D2659 specifies that the primary test material for top load testing is plastic bottles. These bottles can be made from various polymers like PET, HDPE, or PVC. The material should be free from defects and properly conditioned to ensure reliable results. The bottles must be filled with the designated contents, often representing typical product weight, to simulate real-world conditions during testing.
Test Process: The test involves applying a gradually increasing load to the top of the bottle until it deforms or fails. The bottle is placed on a flat, rigid surface, and a compression machine is used to apply the load. The load is applied centrally and uniformly, typically at a rate specified by ASTM D2659. The test duration and conditions (e.g., temperature, humidity) must align with the standard to ensure consistency.
Test Result Interpretation: The test result is based on the amount of weight the bottle can withstand before experiencing permanent deformation or failure. ASTM D2659 provides guidelines for determining the failure point, which is often the maximum top load before visible cracks or collapses occur. This result helps in evaluating the bottle’s durability, particularly for transportation and stacking scenarios. The failure load is compared against product specifications to ensure it meets the required performance standards.