A cap is properly sealed when the contents inside the container cannot leak out and the substances outside of the container cannot creep into it. Besides that, the end user must be able to open the container with a little amount of effort. It should not be made too difficult. We have experienced many times throughout our life for opening and closing of caps. We can analyse easily when a cap seems properly tightened and whether it is too loose or too tight.
Most of the manufacturers judge the situation harshly when determining how tight their caps should be. Appropriate tightening of caps does not create issues related to leakages and you can continue with the intuitive approach when capping your bottles.
Many reasons like industry and government regulations, quality controls etc. percolate that requires to validate the amount of torque applied to their caps. The first step of the process is to identify the amount of torque required for caps. Your cap supplier must have the ability to give you the application torque specification that is definitive for your actual cap.
A bottle cap torque tester is used to determine the correlation between the specified application torque range and removal torque range from your cap. It can be used to validate the capping machine by evaluating the removal torque of the caps applied by the capping machine.
The test procedure is conducted by clamping bottles into the Torque Tester and then applying and removing the caps by hand. Over torqueing leads to some points on the cap to have more pressure that results in an improper seal.
The test procedure includes:
- Applying and removing a cap of the bottle attached to the Torque tester. It is done very slowly and at a uniform rate. Applying and removing caps rigorously can give you inaccurate results.
- It is important to use new caps and bottles during the tests. Reusing caps and bottles gives inaccurate results
- The torque testing must be performed with containers filled with usual contents to give you an actual scene of the test.
- Avoiding spillage of the contents inside on the threads of the bottle or closure must be ensured as it can lead to an inaccurate result.
Presto is one of the leading producers of Digital Torque Tester that brings a highly proficient digital model. It is equipped with a highly integrated digital control panel with a screen that shows digital format torque values. The screen is fitted with bright LED light for clearer vision.