Abstract: The opening tension of the ziplock bag is an important factor that affects its performance. This article uses the Labthink XLW (PC) intelligent electronic tensile testing machine to test the inner and outer opening tension of the ziplock bag sample. And described the test principle, equipment parameters and scope of application, test process, etc., to provide a reference for the enterprise to monitor the opening performance of the zipper bag. Keywords: self-sealing bag with clip chain, inner opening tension, outer opening tension, intelligent electronic tensile testing machine, opening tension 1. Significance The self-sealing bag with a clip chain is a bag that can be repeatedly sealed and opened. It is generally a three-side or four-side sealed bag, on which one side is provided with a clip chain, and the bag is opened and sealed by opening and closing the clip chain. Because of its strong self-sealing effect, good airtightness, easy to carry, it can be opened and sealed repeatedly, and it can maintain the hygiene of the contents in the bag. It is widely used in candy, preserved fruits, tea, seafood, medicine, medical equipment, clothing, accessories , Small mechanical parts, toys and other products. The opening performance of the clip chain has an important influence on the use effect of the self-sealing bag of the clip chain, and the opening pulling force is an index for evaluating the opening performance of the clip chain. If the ribs and grooves of the clip chain are not tight enough, and the opening tension is small, it will result in poor air tightness of the package, easy to leak, and even break the bag under the impact of falling or the impact of the product inside the package; If the opening force of the clip chain is too large, it will cause the packaging bag to be difficult to open. In the process of pulling the clip chain, it is easy for the plastic films on both sides of the clip chain to be stretched or even broken without the clip chain being pulled apart. Affects the convenience of using the chain zipper bag. Therefore, the proper opening tension is one of the basic properties of the zipper bag. Figure 1 Common zipper bag 2. Testing basis This test is carried out according to the relevant provisions of the BB / T 0014-2011 "Zipper Chain Ziplock Bag" regarding the opening tensile test. This standard is applicable to the Zipper Chain Ziplock Bag made of plastic single-layer film, composite film and other materials. 3. Test samples The sample tested here is a transparent zipper bag. 4. Test equipment The test equipment used in this test is the XLW (PC) intelligent electronic tensile testing machine, which was independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd. Figure 2 XLW (PC) intelligent electronic tensile testing machine 4.1 Test principle The opening tension of the clip chain refers to the force required to open the ribs and grooves of the clip chain. During the test, the two pieces of plastic film at the end containing the clip chain sample are clamped into the upper and lower fixtures of the device, so that the clip chain is in the middle of the two fixtures, and the upper fixture of the device moves upward Pulling the clip chain in the middle, the force value sensor configured in the device monitors the force value generated during the pulling process of the clip chain in real time. After the test, the opening tension of the clip chain is calculated and displayed according to the monitoring value. 4.2 Device parameters 500 N and 50 N force value sensors are available for selection. The test accuracy is 0.5, which is far ahead in the industry, effectively ensuring the accuracy of the test results. According to the relevant standards, the equipment provides 50 mm / min, Seven test speeds of 100 mm / min, 150 mm / min, 200 mm / min, 250 mm / min, 300 mm / min, and 500 mm / min can be set freely according to the requirements of the test standard; the ultra-long stroke of 1000 mm can Testing of materials with full and large deformation rate; intelligent configuration such as limit protection, overload protection, automatic return and power-off memory to ensure user's operation safety; one test machine integrates seven independent tests such as tensile, peeling, and tearing The program provides users with a variety of test items. 4.3 Scope of application (1) The equipment can be used for tensile properties, tensile strength, tensile strength and deformation rate, tear resistance, peel strength, heat seal strength, puncture resistance, etc. of plastic films, composite films, sheets and other materials Index test; can be used for the puncture / pulling force test of infusion bag caps, soft rubber stoppers, oral liquid caps; can be used for the unwinding force of tape, anti-pressure of plastic bottles, combination caps and opening of jelly cups, yogurt cup lid films Power and other product and packaging performance tests. (2) This equipment can meet BB / T 0014, ISO 37, GB / T 10004, GB 8808, GB / T 1040.1, GB / T 1040.2, GB / T 1040.3, GB / T 1040.4, GB / T 1040.5, QB / T 2358, QB / T 1130, ASTM D 882, ASTM D 1938, ASTM D 3330 and more than 20 domestic and foreign related standards. 5. Test process (1) Sample cutting Taking the clip chain as the center, 10 samples with a clip chain width of 15.0 mm were cut from the clip chain ziplock bag, 5 of which were used to test the external opening tension and the other 5 were used to test the internal opening tension. (2) Test Set the test speed, sample width, sample name and other parameter information, clamp the sample into the upper and lower fixtures of the device, and click the test option to start the test. The device displays the real-time force value during the pulling of the clip chain, and reports the pull-on force after the test is completed. When testing the inner opening tension, the plastic film parts on both sides of the bag body are clamped (see Figure 3). When testing the outer opening tension, the two plastic film edges on the bag mouth (the other end of the sample) are clamped . Figure 3 Inner mouth pull test 6. Test results In this test, the average value of the outer opening force of the sample of the self-sealing bag with the chain tested was 2.941 N / 15mm, and the average value of the inner opening force was 6.178 N / 15mm. 7. Conclusion Opening pulling force is an important performance of the self-sealing bag with a chain. This paper introduces the testing method of opening pulling force by testing the external opening force and internal opening force of a transparent clip chain self-sealing bag sample produced by an enterprise. The test process is simple and the equipment is easy Operation, the accuracy of the test results is high and the accuracy is good. In addition to the opening tensile force, the XLW (PC) intelligent electronic tensile testing machine equipment used in this paper can also test the heat sealing strength, tensile breaking force, elongation at break, peeling force and other properties of the ziplock bag. Jinan Languang Electromechanical Technology Co., Ltd. is a high-tech enterprise specializing in R & D and production of packaging testing equipment and packaging testing services. The testable performance of existing equipment covers the oxygen permeability, nitrogen permeability, water vapor permeability, and resistance of packaging Impact strength, puncture resistance, solvent residue, total migration, sealing performance and many other properties. The more you understand, the more you trust! Labthink looks forward to enhancing technical communication and cooperation with enterprises and institutions in the industry. Mascara,Lipstick Makeup,Pink Lips,Shine Loud Liquid Lipstick Guangzhou Boxuanya Cosmetics Co., Ltd. , https://www.bxycosmetic.com
Method for detecting opening tension of "zippered ziplock bag"