What are the food packaging bag sealing test methods?

Food packaging bag sealing is a direct decision of the quality of the internal food, if there is a leak, the internal food taste is poor, or cause deterioration, if people accidentally eat, is likely to cause diarrhea, nausea and other acute illnesses. Therefore, we must pay attention to the issue of food packaging sealability during the golden period of shopping for Chinese New Year goods.

 

What is the method of testing the hermeticity of flexible food packaging materials?

 

For the average consumer, there is no easier way to test food packaging than to dip it directly into water and take it out after ten minutes. First observe the appearance, and then open the food bag, if the inside into the water, it shows that the food bag sealing does not meet the standard. This method is simpler and cruder and is done manually.

 

For manufacturers of food packaging, professional, scientific instruments are required for testing. In the packaging materials testing industry, to detect the presence of air leaks in food packaging bags need to use a "seal tester". For food packaging bag sealing test methods, there are now positive pressure test method and negative pressure test two test methods, of course, the test principle is different. Negative pressure test method, also known as vacuum leak detection, is the seal tester with a vacuum chamber, so that the specimen immersed in water to produce the pressure difference between the inside and outside, the specimen to observe the gas escape, in order to determine the sealing performance of the specimen.

 

Compared with the traditional water test method, the seal tester has more scientific, objective and accurate characteristics, even if it is a small food packaging material leakage point, professional sealing test instrument can be more accurate detection of the leak.

 

For the testing of the sealability of flexible food packaging materials, in addition to the above negative pressure sealing test instrument, can also be used to test the principle of positive pressure method of sealing test equipment, which can also be called gas leak detector. Both the negative pressure sealer and the positive pressure sealer can be applied to the sealing test of flexible packaging parts in the food, pharmaceutical, daily chemical and other industries.