The toughness of liquid fertilizer packaging determines whether the product is prone to breakage during transportation and storage. Usually, it is verified by testing the tensile strength and elongation of the package. This paper uses the XLW (PC) intelligent electronic tensile testing machine to test the tensile strength and elongation of aluminum-plastic composite film packaging bags used in liquid fertilizers, in order to evaluate the flexibility of the sample, and through the test process and equipment The description of parameters, principles and other information provides a reference for enterprises to detect the toughness of liquid fertilizer packaging.
1. Significance
Liquid fertilizer products are bulky, volatile and need to be protected from light. Therefore, the packaging should have good toughness and good shading performance. At present, liquid fertilizers are generally packaged in plastic cans or aluminum-plastic composite film packaging 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 likely to be damaged or leaked due to squeezing or falling during transportation and storage. Therefore, production enterprises should strengthen the monitoring of the toughness of liquid fertilizer packaging bags, increase their tensile strength and elongation, and ensure the effective shelf life quality of products. In this paper, the strength and toughness of the aluminum-plastic composite membrane used in the liquid fertilizer are evaluated by its tensile strength and other properties.
Figure 1 Various types of liquid fertilizer packaging
2. Test samples
An aluminum-plastic composite film packaging bag used for liquid fertilizer provided by an enterprise.
3. Test basis
For testing the tensile strength of plastic films or sheets, refer to the testing standard GB / T 1040.3-2006 "Determination of plastic tensile properties Part 3: Test conditions for films and sheets".
4. Test equipment
Jinan Languang Electromechanical Technology Co., Ltd. independently developed and manufactured XLW (PC) intelligent electronic tensile testing machine.
Figure 2 XLW (PC) intelligent electronic tensile testing machine
4.1 Test principle
The sample is clamped between the two chucks of the fixture, and the two chucks make relative movements. Through the force value sensor located on the moving chuck and the displacement sensor built in the machine, the force value change and displacement during the test are collected Change, so as to calculate the tensile, tear, deformation rate and other performance indicators of the sample.
4.2 Scope of application
(1) This equipment can be used for the tensile strength and elongation, tensile properties, tensile strength, puncture resistance, tear resistance, peel strength, heat seal strength and other indicators of plastic films, sheets and other materials Test; can be used to test the puncture / pulling force of infusion bag caps, soft rubber stoppers, oral liquid caps; can be used for the unwinding force of tape, the pressure resistance of plastic bottles, the opening force of the combined lid and jelly cup, the yogurt cup lid film Product and packaging performance testing.
(2) This equipment can meet 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 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 Device parameters
50 N and 500 N force sensors are available.
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. Requires free setting.
The ultra-long stroke of 1000 mm can meet the test of materials with large deformation rate.
Intelligent configuration such as limit protection, overload protection, automatic return and power-off memory ensure user's operation safety.
A testing machine integrates seven independent test procedures such as tensile, puncture, peeling, and tearing, which provides users with a variety of test items to choose from.
Support LystemTM laboratory data sharing system, unified management of test results and test reports
5. Test process
(1) Cut 5 specimens with a width of 15 mm and a length of 200 mm along the horizontal and vertical directions of the sample using a sample cutter.
(2) The two ends of the sample are clamped on the upper and lower chucks of the equipment, respectively, and the long axis direction of the sample should coincide with the center line of the upper and lower clamps.
(3) Set parameter information such as test speed and sample width.
(4) Click the test start option to start the test. The instrument automatically calculates and displays the final test results.
6. Test results
The aluminum-plastic composite film packaging bag tested in this test has a lateral tensile breaking force of 110.346 N, a tensile strength of 63.969 MPa, and an elongation at break of 176.13%; a longitudinal tensile breaking force of 131.225 N, a tensile strength of 75.027 MPa, at break The elongation is 49.36%. It can be seen from the results that the packaging bag used for this product has good toughness.
7. Conclusion
XLW (PC) intelligent electronic tensile testing machine is a high-end instrument professionally used for the performance testing of plastic packaging toughness, peeling performance, puncture resistance, heat seal strength and other indicators, which can truly reflect the tensile strength and elongation of the sample. , Its equipment is easy to operate and high test accuracy. Labthink has always been committed to providing professional testing services and testing equipment to global customers. For many years, it has provided thousands of packaging tensile strength testing solutions to customers around the world, providing customers with reliable data support. You can find more information about related testing instruments such as packaging barrier properties and mechanical properties. Labthink looks forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry.
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