The water vapor transmission rate testing system developed and manufactured by GBPI is used to test the water vapor transmission rate of PET plastic bottle packaging, and introduce the parameters, scope of application, and testing process of the equipment, so as to provide a reference for wine manufacturers to monitor the water vapor transmission rate of PET plastic bottle packaging. The equipment parameters, the scope of application, and the test procedure are introduced to provide a reference for wine manufacturers to monitor the barrier performance of PET plastic bottles to external water vapor.
Keywords: wine, plastic packaging, PET bottle, water vapor transmission rate, moisture barrier, water vapor barrier, water vapor transmission rate tester.
With the development of the wine industry and packaging industry, PET bottles are now gradually entering the wine packaging market, ordinary PET bottles have been widely used in cosmetics, medicine, health care, beverages, mineral water, motor oil, and other products packaging is used to package wine products, PET bottles need to have better barrier properties, moisture resistance, for example, if PET bottle packaging in high humidity environment moisture resistance is poor, that is, water vapor In order to improve the barrier performance of PET bottles, PET bottles are usually modified, such as by coating the surface of PET bottles with silicon oxide and amorphous carbon. Therefore, before the selection and use of PET bottles, the testing of its moisture barrier properties is essential for wine manufacturers.
Test Methods and Instruments
Infrared Water Vapor Permeability Analyzer W405 2.0 is a high-end precision packaging material testing instrument newly developed and upgraded by the GBPI R&D team based on ASTM and GB standard requirements and market demand. It is used to test the water content of samples under set temperature and humidity conditions. Vapor Transmission Rate (amount).
Principle
W405 Infrared Water Vapor Permeability Analyzer adopts the principle of the infrared method. The pre-treated sample is fixed in the middle of the test chamber, and the test chamber is divided into a high-humidity side and a low-humidity side. The compressed air flows on one side of the film, and the dry nitrogen (carrier gas) flows at a fixed rate on the other side. Due to the existence of the humidity gradient, the water vapor will permeate from the high humidity side to the low humidity side, and the water vapor passing through the sample is carried to the infrared sensor by the flowing dry nitrogen, and the water vapor permeability of the sample is obtained by the electrical signal output by the sensor parameters such as overrun.
Test sample and test procedure
PET plastic bottle package provided by a company.
Test procedure.
(1) Apply fast-fix adhesive to the mouth of the PET bottle to fix it on the container test tray device for the instrument, and after the sealing is completed, use the pipeline to connect it to the instrument, and then use the sealing bag to seal and wrap the sample and tray device.
(2) Set the sample name, test temperature, test humidity, and other parameters.
(3) Click the "Start Test" option to start the test.
(4) Start the air source, and adjust the humidity and the flow rate of the carrier gas.
(5) After the test, the instrument automatically calculates and displays the test results.
Test results and analysis
Test results
The average value of the water vapor transmission rate test of PET bottle samples tested in this paper is: 0.0035g/(pkg-24h)
