Air tightness test of plastic bottle is very important

What is the airtightness of medical plastic bottles? Simply speaking, the test is carried out according to relevant national standards. For example, to test the sealing reliability of capsule plastic bottles, a certain number of capsule plastic bottles are taken, each bottle is filled with an appropriate amount of glass balls, and the bottle cap is tightened. Then put it into a container with an air extraction device, submerge it with water, vacuum it to 27kpa, and maintain it for 2 minutes. There shall be no water or bubbles in the bottle. Of course, to ensure the air tightness of plastic bottles and capsules, it also needs some other economic indicators, such as humidity resistance, oxygen resistance and control, to ensure the quality of products in shelf life.

At present, there are also machines to launch the sealing tester in the market. The principle of vacuum cleaner is to use the chamber vacuum to make the samples submerged in the water produce the internal and external pressure difference, and observe the escape of the gas in the samples to determine the sealing performance; or through the vacuum chamber, make the internal and external pressure difference of the samples, observe the inflation of the samples and the recovery of the sample shape after releasing the vacuum, so as to determine the sealing performance.