Standard Test Methods for Measurement of Torque Retention for Packages with Continuous Thread Closures Using Non-Automated(Manual) Torque Testing Equipment

1. Scope

1.1 This is a quantitative method that measures removal torque of continuous thread closures on containers.with matching finishes for predetermined environmental conditions over time. The range of values that can be measured are limited to the equipment used.

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents: therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

4. Summary of Test Methods

4.1 Test Method A: Static Evaluation-At predetermined time intervals, the removal torques of representative samples of a container/continuous thread closure system,previously stored at various environmental conditions, are measured.

4.2 Test Method B; Dynamic Evaluation-Practice D4l69 is used to develop a uniform system of evaluating the ability of primary packages, in shipping units, to withstand the distribution environment, At the end of predetermined distribution cyeles,the removal torques of representative samples of a container/continuous thread closure system are measured.

S. Significance and Use

5.1 This test method allows for the measurement of the torque retention properties of container/continuous thread closure systems of various designs, materials, manufacture, and is suitable for packaging development and engineering evaluation.

5.2 This test method can be used for the evaluation of container/continuous thread closure systems under controlled conditions(where the application torque is known and the applied downward force to the closure is zero).

5.3 This test method measures torque retention properties of container/continuous thread closure systems with the use of anon-automated, spring torque-meter (with either a dial indicator or a digital readout) or a torque wrench.

6.Apparatus

6.1 Non-automated Spring Torque Meter; with an appropriate scale that accurately measures within the expected torque range for the particular container/continuous thread closure

system to be evaluated.

6.1.1 Torque meter, if used, will have a scale where the anticipated torque readings are not less than one-third of the maximum range of the scale for the container/continuous thread closure system to be evaluated. Torque results will be available in a visual format.

6.1.2 A torque wrench, if used, will have an appropriate design and capacity capable of providing a reading within the anticipated range for the container/continuous thread closure system to be evaluated, Torque results will be available in a visual format.

Testing equipment:PNY-20 Torque tester