ASTM D7860-14 Torque Retention for Child Resistant Packaging

The test methods described in ASTM D7860-14 are intended to measure torque retention properties of threaded closures such as child-resistant and non-child resistant medical packaging.

Reported results of ASTM D7860-14 include the application torque range and average application torque per test specimen, as well as the removal torque range and average removal torque per test specimen. In addition to these parameters, it is required to report axial applied force for closures if applicable.

An Electromechanical system with a torsion add-on can be used to perform these tests. The torsion add-on can be added to any 5900 single column testing machine to add rotational capabilities. The system operates on Instron’s Bluehill® 3 Software with TestProfiler. Bluehill 3 is able to performed closed-loop control for axial testing and measures axial displacement, rotary displacement, axial load and torque. A biaxial Dynacell load cell is mounted to the base of the machine. Advanced screw action grips are used to grip the bottle and bottle cap. A slight axial load can be placed on the bottle cap to push it down before rotation begins.