Vacuum containers are more popular nowadays in household applications. Vacuum containers can keep freshness and avoid taint of odor. Therefore, how to assure the seal capability of vacuum container is very important for household manufacturers. The testing methods are as follows:

1. Underwater Decompression Method:

Labthink PARAM MFY-01 Leak Tester is on underwater decompression method according to GB/T 15171-94 Test Method for Leaks in Sealed Flexible Packages. Put a certain amount of distilled water into the vacuum chamber, and put the sealed vacuum container into the distilled water completely. Then, set the testing pressure and testing time. Usually, the vacuum degrees are 20, 30, 50 and 90 kPa, etc. Start testing. When the leak tester has reached a certain vacuum degree, stop vacuumizing and observe. The inner-out pressure difference of the specimen will cause inferior quality specimen leak so as to test leakage.

2. Pressured Testing Method

Labthink PARAM LSSD-01 Leak and Seal Strength Detector is of pressured testing method. Imposing high pressure gas into the vacuum container and test the pressure resistance, sealing degree and leak indexes so as to test integration and seal performance of the vacuum container.

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