Test method for package toughness of aluminum plastic composite film for liquid fertilizer

Abstract: the toughness of liquid fertilizer packaging determines whether the product is easy to be damaged during transportation and storage Generally, it is verified by testing the tensile strength and elongation of the package In this paper, XLW (PC) intelligent electronic tensile testing machine is used to test the tensile strength and elongation of the aluminum-plastic composite film packaging bag used for liquid fertilizer, so as to evaluate the flexibility of the sample Through the description of the test process, equipment parameters, principles and other information, it provides a reference for the enterprise to test the toughness of the liquid fertilizer packaging Key words: liquid fertilizer, aluminum-plastic composite film, damage, leakage, toughness, tensile strength, elongation, intelligent electronic tensile testing machine 1 Meaning liquid fertilizer products are bulky, volatile and need to avoid light, so their packaging should have good toughness and good light shielding performance At present, liquid fertilizer is generally packaged in plastic cans or aluminum-plastic composite film bags If the toughness of the packaging bag is poor, that is, the tensile strength and elongation of the packaging are poor, the liquid fertilizer is easy to be damaged or leaked due to mutual extrusion or drop during transportation and storage Therefore, the manufacturer should strengthen the monitoring of the toughness of the liquid fertilizer packaging bag, enhance its tensile strength and elongation, and ensure the effective shelf life quality of the product In this paper, the tensile strength and other properties of the aluminum-plastic composite film used for liquid fertilizer are tested to evaluate its toughness Fig 1 all kinds of packages of liquid fertilizer 2 Aluminum plastic composite film packaging bag used for testing the liquid fertilizer provided by an enterprise 3 The test basis can refer to the test standard GB / T 1040.3-2006 plastics - Determination of tensile properties - Part 3: test conditions for films and sheets 4 Test equipment: XLW (PC) intelligent electronic tensile testing machine independently developed and manufactured by Jinan Languang Electromechanical Technology Co., Ltd Fig 2 4.1 test principle of XLW (PC) intelligent electronic tensile testing machine clip the sample between two collets of the fixture, the two collets do relative motion, through the force value sensor on the dynamic collet and the displacement sensor built in the machine, collect the force value change and displacement change in the test process, so as to calculate the tensile, tearing, deformation rate and other performance indexes of the sample 4.2 scope of application (1) this equipment can be used to test the tensile strength and elongation, tensile performance, breaking force, puncture resistance, tear resistance, peel strength, heat sealing strength and other indexes of plastic film, sheet and other materials; it can be used for puncture of infusion bag cover, soft rubber bottle plug and oral liquid cover/ It can be used to test the unwinding force of adhesive tape, the pressure resistance of plastic bottle, the opening force of combined cover, jelly cup, yoghurt cup cover film and other products and packaging performance (2) The equipment can meet the requirements of GB / T 1040.1, GB / T 1040.2, GB / T 1040.3, GB / T 1040.4, GB / T 1040.5, GB / T 10004, ISO 37, GB 8808, 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 relevant standards at home and abroad 4.3 the force value sensors of 50 N and 500 N are available for selection According to the relevant standards, the equipment provides seven test speeds of 50 mm / min, 100 mm / min, 150 mm / min, 200 mm / min, 250 mm / min, 300 mm / min and 500 mm / min, which can be set freely according to the requirements of the test standards The ultra long stroke of 1000 mm can meet the test of materials with large deformation rate Intelligent configuration of limit protection, overload protection, automatic return and power failure memory can ensure the operation safety of users A testing machine integrates seven independent testing procedures, such as stretching, puncture, peeling and tearing, which provides users with a variety of test options Support Lystem TM laboratory data sharing system, and manage test results and test reports in a unified way 5 Test process (1) use a sample cutter to cut 5 samples with a width of 15 mm and a length of 200 mm along the transverse and longitudinal direction of the sample (2) The two ends of the sample shall be respectively clamped on the upper and lower chucks of the equipment, and the long axis direction of the sample shall coincide with the central line of the upper and lower clamps （3） Set test speed, sample width and other parameter information (4) Click the test start option to start the test The instrument automatically calculates and displays the final test results of Zui 6 Test results: the transverse tensile strength, tensile strength and elongation at break of the aluminum plastic composite film packaging bag are 110.346 n, 63.969 MPa, 176.13% and 131.225 n, 75.027 MPa and 49.36% respectively It can be seen from the results that the toughness of the packaging bag used for this product is better 7 Conclusion XLW (PC) intelligent electronic tensile testing machine is a professional instrument for testing the toughness, peeling performance, puncture resistance, heat sealing strength and other performance of plastic packaging, which can truly reflect the tensile strength and elongation of samples, and its equipment is simple in operation and its testing accuracy is better than 0.5 level Labthink Languang has been committed to providing professional testing services and testing equipment for customers around the world Over the years, it has provided thousands of testing schemes for the tensile strength of packaging for customers around the world, providing customers with reliable data support Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry