Abstract : The water content in the floss is relatively low, and it is easy to absorb the water vapor in the surrounding environment. Therefore, for the floss packing, it should have high moisture resistance and prevent the floss from getting mouldy and deterioration due to the increase of the moisture content. This article uses the W3/330 water vapor transmission rate test system independently researched and developed by Jinan Languang Electromechanical Technology Co., Ltd. to test the moisture resistance of the plastic composite film for meat pine packaging, and briefly describes the testing principle and the experimental operation process of the equipment. The detection of water vapor transmission rate of soft plastic packaging has certain guiding significance. Keywords: soft plastic packaging, plastic composite film, aluminized composite film, aluminum-plastic composite film, moisture barrier, water vapor transmission rate, water vapor transmission rate test system, meat floss, meat products, agglomerate, moldy 1 , the meaning Floss is a traditional Chinese food of the Han nationality. It is made from lean meat such as pork, fish or chicken and duck meat. It is delicious and delicious and is very popular. The lower moisture content in the floss requires that the packaging material should have a low water vapor transmission rate, that is, the moisture resistance should be high, otherwise it will cause the meat floss to increase its internal moisture content due to contact with more moisture, giving the microorganisms The breeding provides a good matrix, causing agglomeration, mildew, and rancidity and other quality problems. Therefore, it is an effective way to reduce the probability of floss deterioration caused by packaging problems by strengthening the moisture vapor permeability test of meat floss packaging and strictly controlling the moisture resistance of the package. 2 , the status quo At present, there are weighing methods ( cup method ) , electrolysis method, humidity method, and infrared method for measuring the water vapor transmission rate of soft plastic packaging in China. The standard methods that can be referred to are GB 1037-1988 “Plastic Films and Sheets. Test method for water vapor permeability of cups", GB/T 16928-1997 "Testing methods for moisture permeability of packaging materials ", GB/T 21529-2008 "Determination of water vapor transmission rate of plastic films and sheets - Electrolytic sensor method" , GB / T 30412-2013 "water vapor transmission rate of plastic film and sheet of the humidity sensor measurement method" (published 2014 December 1 embodiment). This article uses the electrolytic method to test the water vapor transmission rate of pork floss packaging, based on the standard GB/T 21529-2008 "Determination of plastic film and sheet water vapor transmission rate - electrolytic sensor method." 3 , test sample A brand of plastic packaging film for meat packaging. 4 , test equipment The test equipment used in this article is Labthink blue light W3/330 water vapor transmission rate test system. Figure 1 W3/330 Water Vapor Transmission Rate Test System 4.1 Test principle The device uses the principle of electrolytic sensor test. Nitrogen with a stable relative humidity flows on one side of the membrane. Dry nitrogen flows on the other side of the membrane. Due to the presence of a humidity gradient, water vapor diffuses through the test membrane from the high-humidity side. On the low-humidity side, on the low-humidity side, the transmitted water vapor is carried by the flowing dry nitrogen gas to the sensor, and when it enters the sensor, an electrical signal of the same proportion is generated. By analyzing and calculating the electrical signal of the sensor, the water vapor of the sample is obtained. Transmissibility and other parameters. If the test sample is a packaging container, dry nitrogen flows in the container and the outside of the container is in a highly humid state. 4.2 Scope of application (1) This equipment is applicable to the testing of the water vapor transmission rate of packages such as films, sheets, paper, cardboard, composites, and containers. The films include various plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils, aluminum foil composite films, glass fiber aluminum foil composite films, etc.; sheet materials including various engineering plastics, rubbers , sheet materials such as building materials, such as PP sheet, PVC sheet, PVDC sheet, etc.; paper, cardboard and composite materials including paper, cardboard, etc., such as cigarette pack aluminum paper, paper aluminum plastic composite sheet, etc.; Containers include water vapor permeability tests for bottles, bags, cans, boxes, and barrels made of plastic, rubber, paper, paper-plastic composite, glass, metal, etc., such as Coke bottles, peanut oil drums, Tetra Pak packaging, and vacuum. Packaging bags, metal packaging bags, metal three-piece cans, plastic cosmetic hose packaging, toothpaste hose packaging, jelly cups, etc. In addition, through special configurations, the device can also be used for the testing of water vapour permeability of special packages such as pharmaceutical blisters, pharmaceutical plastic bottles, instant noodle bowls, paper cups, paper bowls, automobile fuel tanks, and battery plastic housings. (2) This equipment complies with many national and international standards such as GB/T21529 , ISO15106-3 , DIN53122-2 , and YBB00092003 . 4.3 Equipment Parameters 5 , the test process (1) cut with a dedicated sampler samples were taken of 108 mm × 108 mm from the sample surface 3. (2) The three samples were clamped in a test chamber of the instrument 3, tightening test chamber. Figure 2 loading process (3) Set the sample thickness, test temperature, test humidity and other parameters. (4) Adjust the pressure of nitrogen gas so that the humidity in the test chamber reaches the set value, and pass the nitrogen flow adjustment knob so that the nitrogen flow in the upper and lower chambers reaches the standard value. (5) Click to start the test option and the test begins. The instrument automatically records the changes in the water molecule content on the low-humidity side during the test and calculates the final test results. 6 , test results The water vapor transmission rates of the three samples were 3.251 g/(m2·24h) , 3.209 g/(m2·24h) , and 3.229 g/(m2·24h), respectively . 7. Conclusion W3 / 330 water vapor transmission rate test system for detecting water vapor transmission rate performance data floss PA plastic composite film good repeatability, high accuracy, can be a true reflection of moisture barrier packaging, while a test sample obtained three test As a result, the test efficiency is greatly improved. In addition to fluffy packaging plastic composite film, W3/330 can also be used for moisture resistance testing of films, containers, sheets and other products for packaging of foods, pharmaceuticals, chemicals, building materials, and other products. Labthink has been dedicated to providing professional testing services and equipment for customers worldwide. Over the years, it has provided tens of thousands of water vapor transmission rate testing services to customers worldwide, providing customers with reliable technical solutions. Learn more testing instruments concerning the information, you can visit Labthink website to view specific information or call us directly. Labthink expects to enhance technical exchanges and cooperation with users in various industries. Gloss Vinyl,Yellow Wrap Car,Tesla Nardo Grey,Light Purple Car Wrap Guangzhou Wanheyan Innovative Materials Co., Ltd. , https://www.wrapremi.com
