According to the standard GB/T 21732-2008 "milk-containing beverage", lactic acid bacteria beverages can be classified into sterilized (non-live bacteria) type and non-sterilized (live bacteria) type according to whether they have been sterilized. Among them, the live type lactic acid bacteria sterilize the raw materials before filling, and fill them in a sterile environment to ensure the activity of the fungi in the lactic acid bacteria beverage. As a result, it has placed high demands on the barrier properties of packaging materials. Lactic acid bacteria beverages are usually packed in plastic bottles. The materials are generally made of PS or HDPE, and are equipped with corresponding sealing films. The test for the overall performance of the package can be carried out in accordance with GB/T 31354-2014 "Coupon Test Method for Oxygen Permeability Test Method for Packages and Containers", which has been implemented since March 2, 2015, using isostatic test. principle. Since the sealability of the bottle mouth has a great influence on the overall barrier performance of the package, the bottle seal film should be kept as much as possible during the test. Therefore, the sample opening should be opened from the bottom, and the inlet and outlet lines of the container sealing device should be deeply inside the package from the bottom of the container, and the bottom of the container and the sealing device should be sealed with glue. Then test the sample on the device. Based on this idea, Jinan Languang extracted eight brands of lactic acid bacteria beverages from the market for testing. Samples were taken from live and bactericidal samples, and the packaging materials were PS or HDPE. According to statistics, the market use of lactic acid bacteria beverage packaging materials is as follows: live bacteria type lactic acid bacteria beverages mostly use PS materials (such as Yakult), while sterilized lactic acid bacteria beverages mostly use HDPE materials (such as Wahaha lactic acid bacteria beverage). We tested the overall oxygen transmission of the sampled lactic acid bacteria beverage package using the Jinan Languang i-Oxtra 7700 Oxygen Transmission Rate Test System. The test results are as follows: the oxygen permeability of the PS material container is between 3.0 and 4.0 cm3/pkg.24h, and the oxygen permeability of the HDPE material container is less than 2.0cm3/pkg.24h. The effect of packaging barrier properties on the shelf life of food has been widely recognized. For live lactic acid bacteria, the test of oxygen barrier properties of packaging materials not only affects the shelf life, but also the number of live bacteria contained in lactic acid bacteria beverages during shelf life. Great impact. Using the method described in this paper, the sealing film sealing performance can be indirectly verified at the same time, which can objectively and accurately reflect the overall barrier performance of the lactic acid bacteria beverage packaging, and provide a basis for packaging quality assessment, packaging material selection, and quality control of the production process. Jinan Languang Electromechanical Technology Co., Ltd. Packaging Safety Testing Center has been committed to providing professional materials physical testing solutions and services to customers around the world, and accumulated a lot of valuable experience and data in actual testing. If you have any related product quality problems or want to know more test details, please feel free to send an e-mail to the product quality problems that are easy to occur in production, transportation, sales, etc. We will be happy to provide you with technology. service. YESWITCH ELECTRONICS CO., LTD. , https://www.yeswitches.com