Most manufacturers will use airtight food packaging. It is because air lowers the shelf life of food and it can have a negative impact on its quality. It is the reason why it is critical that they use Leak Detection Equipment to ensure the integrity of the packaging they are using.
1. Vacuum Decay
In this method, there will removal of any content in some part of the packaging material completely and stabilizing the pressure in that area. After that, you will use equipment to measure any changes in pressure after the stabilization. However, you can only use this method for the packaging materials that can survive in vacuums. A key benefit of this method is that temperature changes cannot affect its integrity.
2. Pressure Decay
The pressure decay test works on a concept opposite to that of the vacuum decay. It works on a scientific concept that anticipates the internal pressure of packaging material to reduce when there is a leak. Before the test begins, you will fill the material will dry nitrogen at a specific pressure. After that, all you have to do is monitor the pressure. If the pressure does not reduce with time, it means that packaging is not leaking. If the opposite happens, then the packaging is leaking.
3. Bubble Method
The bubble test is one of the simplest tests that an individual can use to detect if a food packaging is leaking. Also, it does not require the use of complex Leak Detection Equipment compared to the other tests. In this method, you will need to pressurize the packaging using air. You should take care to ensure that you do not put excess pressure such that it bursts. After that, you will submerge it into a container filled with water. If the packaging is small, it would be better to submerge it in a transparent container. After that, you will observe for any bubbles. If it is leaking, you will witness the emergence of bubbles. A key benefit of this method is that you can pinpoint accurately the area where the leak is coming.
4. Ultrasonic Test
All leaks will produce sounds. The reason why you cannot hear them most of the times is that their frequency is too low or too high for your ears to pick. It is the reason why in this test you will need to use an ultrasound to detect if there are any sounds. Ultrasound detectors are very portable devices which you can comfortably hold in your hand. Some will have headphones, a nozzle for adjusting the sensitivity, and a meter. Other detectors have the capability of measuring the leak rate.