The packaging bag is widely used in various fields of food packaging and pharmaceutical packaging, and its packaging cost is economical, easy to process, easy to control, easy to produce, etc. It is a packaging form that is very popular in the market, the sealing performance of the packaging bag, Seal strength is an important indicator of the quality of the package. In the food and drug industry, packaging bags are full of various fields, and there is no need to rumor about the application. Generally, the materials used in the packaging bags have excellent printing performance, which can play a very good publicity role; as a commodity, the packaging bag is also a product circulation link. Protection, in order to prevent damage caused by logistics and transportation; the most important function of the packaging bag is to keep fresh and quality, so that the products that finally reach the consumer's hands can meet the expected design requirements. However, we may not only see various complaints from customers, or various claims from customers, which not only causes huge economic pressure on enterprises, but also damages the reputation of the company. All the roots are due to the packaging bags. The quality is not qualified, which causes the company to suffer huge losses. This is indeed worth the loss. It can be seen that how to ensure the quality of the packaging bag has become a favorable guarantee for improving the product safety factor and extending the product shelf life. Hydrogen Peroxide,Carbamide Peroxide,Hydrogen Dioxide,Sodium Peroxide Jiang Xi Hi-Tech Technology Co.,Ltd. , https://www.hi-techmasterbatch.com
1. The test significance of the sealing of the packaging bag
The loss caused by the unqualified packaging bag is heavy, and the lesson is profound. How to ensure the quality of the packaging bag becomes a necessary condition for the detection of the packaging bag. There are two main reasons for the quality problems of the packaging bag: First, the material quality of the packaging bag is poor. For example, the adhesive strength of the interlayer is insufficient to cause the packaging bag to stratify and lose the protective effect, or the heat sealing material is not closed, and the heat sealing quality is Unstable results in insufficient sealing strength or poor sealing or leak sealing; second, improper heat sealing conditions, heat sealing temperature, heat sealing time, heat sealing pressure are the three elements of heat sealing. In order to ensure the quality of the packaging bag, the most reliable and scientific means is to detect, so that not only can the quality of the packaging bag and the bag breaking rate be clearly understood, but also the sustainable control of product quality can be guaranteed.
2, the detection method of packaging bag sealing
2.1 Negative pressure test, also known as "foaming method".
Test principle: immerse the bag to be tested in a vacuum tank filled with water, vacuum the vacuum tank, and expand when the internal pressure of the bag is greater than the external pressure. When the seal is not good, there will be foaming and no blistering. When it comes out, it means the seal is good.
Test steps:
This step is introduced by taking the LEAK-5001 seal tester produced by Jinan Sike Test Technology Co., Ltd. as an example. The instrument adopts TFT true color liquid crystal display, touch screen operation, and the test process is fully automatic, without any manual intervention, the test process as follows:
l Add the right amount of water to the vacuum tank
l Put the bag in the vacuum tank and cover the seal
l Start experiment (touch operation)
l Vacuuming the vacuum tank
l Observe whether there is blistering around the package (there is a leak when there is a bubble, and there is no bubble to indicate a good seal) 
2.2 Positive pressure test.
Test principle:
The positive pressure test is more complicated than the negative pressure test. The test modes mainly include:
Bursting test: the bag is filled with gas until it breaks, and the sealing strength is evaluated by the maximum breaking pressure;
Standard Creep: Fill the bag with a certain pressure of gas and keep it for a specific time. Determine the creep behavior of the bag seal under continuous load by the change of pressure inside the bag.
Creep rupture: fill the bag with a certain pressure of gas for a certain period of time, then continue to fill the package with gas until it ruptures, and judge the pressure resistance of the bag after creep through the pressure change and the burst pressure during the process. which performed.
Note: The FIXT-PKG-F1203 accessory can simulate various tests of the bag under conditions of limited expansion.
Various tests for the sealing strength of the three-side sealing bag can be carried out by means of the accessory FIXT-PKG-F1204.
Test steps:
This step introduces the PKG-1201 leak tester produced by Jinan Sike Test Technology Co., Ltd. as an example. The instrument adopts TFT true color liquid crystal display, touch screen operation, and the test process is fully automatic, without any manual intervention, the test process as follows:
l Place the prepared bag on the test stand
l Test needle pierced into the rubber bag sealed bag
l Select test mode, set parameters
l Click the “Test†button and the test will proceed automatically until the end. 
3. Conclusion
Packaging bags are widely used in various fields of food packaging and pharmaceutical packaging. The quality of packaging bags directly affects the safety and shelf life of foods and medicines, and the cost of packaging bags is economical. However, the losses caused by unqualified products are heavy. The lesson is profound. To ensure the safety and shelf life of packaging products, the most reliable and scientific means is to detect, so that not only digital test results, easy to archive comparison, but also a clearer understanding of the overall quality of the package, which is conducive to the source of the problem. More beneficial is that detection is a powerful guarantee for product quality sustainability control.
Author: Xu Li
Unit: Jinan Sike Testing Technology Co., Ltd.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn