Performance and quality control of antibacterial packaging film The meaning of active packaging activity means that the packaging material has the functions of antibacterial, oxygen scavenging, dehumidification, ethylene removal, flavor release and absorption. The antibacterial packaging film is a kind of active packaging material, and is mainly an antibacterial film prepared by adding a certain antibacterial agent to a natural macromolecular substance as a carrier. Because antibacterial packaging has a prominent role in ensuring food safety and extending the shelf life of food compared to ordinary packaging, it has demonstrated an unparalleled advantage in conventional packaging in the food industry. Labthink Languang As an excellent provider of testing instruments and inspection services, the next step will be to introduce quality control items for antibacterial active packaging films in combination with testing instruments. In order to enable the antibacterial packaging film related units to deeply solve the quality control projects and means. First, thickness detection: Whether the thickness of the antibacterial active film is uniform or not is the basis for detecting various properties of the antibacterial packaging film. The uneven thickness will not only affect the tensile strength and barrier properties of the film, but also affect the subsequent processing of the film. There are various methods for measuring the thickness. The thickness of the antibacterial packaging film should be measured by GB/T 6672 plastic film and sheet thickness measurement mechanical measurement method (GB/T 6672-2001, idt ISO 4593) The thickness measurement can be carried out using Labthink 's CHY-C2 and CHY-CA thickness gauges, which are all high-precision testers that meet the requirements for antibacterial active film thickness measurement. The test resolution is up to 0.1 micron; in addition to the high precision and high efficiency of the CHY-C2 type, the CHY-CA thickness gauge adopts the automatic forward drive system for measuring samples, which greatly improves the test efficiency and fully satisfies the user. Requirements for continuous and efficient testing. Second, anti-pendulum impact test The anti-impact property control of the antibacterial active packaging film can prevent the damage of the packaging surface due to insufficient toughness, and effectively prevent the product from being damaged due to the impact resistance or the drop performance of the antibacterial active packaging film material in the circulation. Problems such as leakage or deterioration. The anti-pendulum impact test of antibacterial active packaging film is carried out according to GB/T 8809-1988 "Plastic film anti-pendulum impact test method", Labthink Languang's FIT-01 film impact tester performs this standard, and the instrument and other The instrument is more advanced than the function. For example, the sample clamping and the release of the pendulum are pneumatically controlled. The similar instruments currently seen are manual clamping samples; the pneumatic clamping is fast and efficient, and the clamping force on the four-shot of the film is uniform. It is not easy to produce slippage of the sample during impact and affect the accuracy of the test results. In addition, the precision is as high as 0.001J. The film impact tester that can be seen at present is basically mechanical. The data is read from the scale of the dial with low precision. Third, tear resistance test Anti-bacterial active packaging film packaging products may be torn by external force during storage and transportation. Sufficient tear propagation resistance can reduce the transmission of tears and avoid leakage problems. The tear resistance test of the antibacterial film can be carried out according to the Elmendorf method, and the GB/T 11999-1989 (I SO 6383-2) plastic film and sheet tear resistance test method is carried out. Labthink's SLY-S1 tear meter can be used for testing. The instrument uses computer control and display, as well as computer level adjustment technology to ensure accurate and reliable test data; the unique "three-circle" analysis technology can help users to visually analyze and evaluate data. Fourth, sealing performance testing Antibacterial active packaging is extremely important due to its strict requirements, and sealing performance testing is extremely important. If a leak occurs, the packaging effect of the product will be lost. The term "sealing property" refers to the property of the packaging bag to prevent other substances from entering or the contents from escaping. There are two methods for commonly used detection methods: 1. Water decompression method: The method can be tested according to GB/T 15171-94 "Test Method for Sealing Performance of Flexible Packages". Here, the MFY-01 of Labthink is used as an example. The instrument adopts the equipment of water decompression principle. The test process is as follows: Put the appropriate amount of distilled water in the tank, put the package into the vacuum tank and put it on the lower side of the pressure plate to completely immerse the package into the water; then set the vacuum pressure and time of the test, generally set the vacuum degree to 20, 30, 50, 90 kPa and so on. The vacuum was stopped when a certain degree of vacuum was reached, and the time for maintaining the vacuum was 30 seconds. The test is started, the vacuum chamber is evacuated, and the sample immersed in water is subjected to internal and external pressure difference, and the gas escape condition in the sample is observed to determine the sealing performance of the sample. 2, positive pressure detection method Take Labthink's LSSD-01 leak and seal strength tester as an example. The instrument is tested by positive pressure. By applying pressure to the inside of the package, the pressure resistance, sealing degree and leakage index of the flexible package are detected, thereby achieving the purpose of detecting the integrity and sealing strength. During the test, high-pressure gas is injected into the antibacterial package to quantitatively detect the sealing performance and the leakage amount. V. Barrier performance test Barrier refers to the barrier effect of packaging materials on permeates such as gases and liquids. The entry of oxygen and water vapor will accelerate the deterioration of the product, which is completely contrary to the original intention of antibacterial extended shelf life, so it is necessary to check the barrier performance. The detection barriers are respectively implemented in GB 1038 "Plastics film and sheet gas permeability test method - differential pressure method" and GB 1037 "plastic film and sheet water vapor permeability test method - cup method", can use Labthink blue light VAC series Differential pressure gas permeation instrument or PERME OX2/230 oxygen transmission rate test system, water vapor barrier performance can be used Labthink blue light TSY-T series moisture permeability tester or PERME W3/330 water vapor transmission rate test system. The above is a brief introduction of the detection items and testing instruments for antibacterial active packaging film and antibacterial packaging. For specific testing methods, procedures, requirements and test data, we will not introduce them here. Labthink hopes to use this article to introduce the industry and industry. Colleagues conduct more communication. For more information, please call Zhang Jianbo (), headquarter of Jinan Languang Electromechanical Technology Co., Ltd.
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