Abstract: Plastic bags are mainly used to hold articles. The important performance of Zui is the pros and cons of the heat sealing effect at the bottom of the bag. In order to prevent the leakage of the seal during the use of the seal, and to avoid the waste of the plastic bag, it is necessary to strengthen the monitoring of the heat seal performance of the bottom of the plastic bag. In this paper , the XLW intelligent electronic tensile testing machine independently developed by Jinan Languang Electromechanical Technology Co., Ltd. is used to test the heat sealing strength of plastic bag samples, so as to evaluate the sealing performance of the sample sealing, and pass the test process and equipment parameters and principles. The description of the information provides a reference for the company to test the bottom load bearing strength of plastic bag products. Keywords: plastic bag, film, heat sealing performance, heat seal strength, bottom load bearing strength, intelligent electronic tensile testing machine 1. significance Plastic bags are indispensable for people in their daily lives and are often used to hold other items. Because of its low cost, extremely light weight, large capacity, and easy storage, it is widely used, but it is banned from use and production in some countries because of the short degradation cycle of plastic bags and the difficulty of handling. In order to reduce the environmental pollution of plastic bags, the recycling rate of plastic bags should be increased to reduce the production of plastic bags. The firmness of the plastic bag body is the key to ensuring repeated use, especially the bottom sealing performance of the plastic bag. Therefore, plastic bag manufacturers should strengthen the heat seal strength testing of the bottom of plastic bags, timely evaluate the sealing performance of the bottom of the bag, and extend the life cycle of the plastic bags. If the heat-sealing strength of the bottom of the plastic bag is low, it is easy to be cracked and easily leaked at the seal and cannot be reused; if the heat-sealing strength of the bottom of the plastic bag is high, the heat seal is likely to shrink and even cause heat of the package. The problem of undercutting in the seal caused the package to leak easily at the root of the heat seal or even break the bag. In summary, production companies should attach great importance to the detection of heat seal strength of plastic bags. Figure 1 common plastic bag 2. Test samples A sample of a vest-type plastic bag provided by a company. 3. Detection basis The domestic testing standards for the heat-sealing strength of plastic film packaging bags mainly refer to QB/T 2358 " Test method for heat-sealing strength of plastic film packaging bags". 4 , test equipment Jinan Languang Electromechanical Technology Co., Ltd. independently developed and designed the XLW intelligent electronic tensile testing machine . Figure 2 XLW intelligent electronic tensile testing machine 4.1 Test principle The sample is clamped between the two chucks of the clamp, and the two chucks are moved relative to each other. The force value sensor and the built-in displacement sensor on the movable chuck are used to collect the force value change and displacement during the test. Change, to calculate the heat seal strength, tensile, tear, deformation rate and other performance indicators of the sample. 4.2 Scope of application (1) This equipment can be used for heat sealing strength properties, puncture resistance, tensile properties, tensile strength, tensile strength and deformation rate, tear resistance, peel strength properties, etc. of plastic film, composite film, sheet and other materials. Test of indicators; can be used for infusion bag cover, soft rubber stopper, oral liquid cap puncture / pull force test; can be used for tape unwinding force, plastic bottle anti-pressure, combination cover and jelly cup, yogurt cup cover film opening Testing of products and packaging properties such as force. (2) This equipment can meet ISO 37 , GB 8808 , GB/T 1040.1 , GB/T 1040.2 , GB/T 1040.3 , GB/T 1040.4 , GB/T 1040.5 , GB/T 4850 , GB/T 12914 , GB/ T 17200 , GB/T 16578.1 , GB/T 7122 , GB/T 2790 , GB/T 2791 , GB/T 2792 , GB/T 17590 , ASTM E4 , ASTM D882 , ASTM D1938 , ASTM D3330 , ASTM F88 , ASTM F904 , JIS P8113 , QB/T 2358 , QB/T 1130 and other related standards at home and abroad. 4.3 Equipment parameters 5. Test process (1) by clipping cut sampler width 150 mm from the bottom of the plastic bag, a sample strip developed length of 100 mm 10. (2) The two ends of the sample strip are respectively clamped on the two clamps, and the long axis direction of the sample strip should coincide with the center line of the two clamps. (3) Set parameter information such as test speed and sample width. (4) Click the Start Test option and the test begins. The instrument automatically records the force values ​​during the test and calculates the test results. 6. Test results In this paper, the heat seal strength of the plastic bag sample edge seal is: 7.619 N/15mm , 7.882 N/15mm , 8.257 N/15mm , 8.323 N/15mm , 8.554N/15mm . 7. Conclusion XLW intelligent electronic tensile testing machine is a professional testing equipment for the tensile strength of plastic shopping bags. It has high test accuracy and good repeatability of test results, which can truly reflect the heat sealing strength of the bottom of plastic bags. Labthink has been committed to providing professional inspection services and equipment to customers around the world. Over the years, it has provided thousands of heat seal strength testing services to customers around the world, providing customers with reliable technical solutions. Labthink is looking forward to enhancing technical exchanges and cooperation with users in various industries.
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