Development of leak testing
The sealing test has been used in military products for a long time. Sealing is one of the important measures to ensure the reliability of military products after long-term storage. The sealing test is an effective test to check product leakage. For military products with poor airtightness, especially ammunition containing chemical agents, during transportation, they are affected by humidity, salt spray, mold and other harmful environments, which will have the following adverse effects: Storage and other services. Treatment and use: The product decomposes after being charged and absorbed moisture. Failure to make the function unreliable, or even misfire; long-term exposure to moisture and salt spray accelerates the electrochemical process of metal parts; mold intrusion affects product safety; abnormal leakage of explosion or combustion gas affects the combat effectiveness of weapons.
Like other environmental tests, sealing tests are necessary for high-reliability components and military equipment. Therefore, international standards have conducted long-term research on the test methods of this project. The IEC standard 68-2-17 test Q seal specifies several tests suitable for different applications and test procedures under different conditions. The domestic electronics industry has extensively carried out sealing tests, such as the sealing tests of various semiconductor devices, integrated circuits, relays and other vacuum components, but there are very few sealing tests in the packaging industry. Generally only rely on manual inspection or immersion test. In recent years, with the development of economy and the progress of science and technology, people have put forward higher and higher requirements for the performance and quality of packaging. Some products have also proposed corresponding national standards for their sealing performance, and some institutions have also carried out research in this area.
The influence of airtightness on the quality of packaging products
In the packaging process of the product, due to various factors, leakage, press-through, or cracks and micropores in the material itself may form small holes connected inside and outside due to the influence of various factors, which will affect the contents of the package. Adversely affected by things. Especially for the packaging of food, medicine, daily chemicals and other products, the tightness will directly affect the quality of the product. For example, if the airtightness of vacuum and inflatable packaging is not good, even if high barrier materials are used, the shelf life of the product will be directly shortened, causing certain economic losses to the enterprise. From this perspective, the sealing test of packaging products is a feasible way to enhance the corporate image and obtain long-term economic benefits.
