The testing scheme of the friction coefficient of the plastic compound film for the packaging of rice cake

Abstract: the friction coefficient of packaging roll film is an important performance, which has a great influence on the process of unwinding, opening and bag cutting In this paper, the mxd-02 friction coefficient instrument independently developed by Jinan Languang mechanical and Electrical Technology Co., Ltd is used to verify the friction coefficient of rice cake packaging roll film The test principle, parameters, application scope and brief test process of the equipment are introduced, which provides an effective test method for the enterprise to test the friction coefficient of packaging roll film Key words: friction coefficient, dynamic friction coefficient, static friction coefficient, smoothness, soft plastic packaging, New Year cake, pastry, slip, poor opening 1 Significance friction coefficient is the physical quantity that characterizes the smoothness of packaging materials, divided into dynamic friction coefficient and static friction coefficient, which is an important test index of packaging materials The friction coefficient is directly related to the packaging process If the friction coefficient of the package is too small or uneven, it is easy to cause the package roll film to slip, deviate, or the stacking materials are not stable, resulting in the wrong side; if the friction coefficient is too large, it is easy to cause the package roll film not smooth, or the opening of the package bag is poor when filling the contents, etc Therefore, the appropriate friction coefficient is of great significance to the improvement of production efficiency New Year cake is a traditional food in Southeast Asia It is mainly steamed with sticky rice, rice flour and yellow rice It is a seasonal food in the lunar year It has two colors of white and yellow, which symbolizes gold and silver It is homophonic with "Nian Gao", which means people's life is getting better and better In this paper, the friction coefficient of the inner surface and the outer surface of the roll film was measured by simulating the friction process of the packaging material when the roll film was drawn Fig 1 packaging of finished rice cakes 2 The current rice cakes are mostly packed with plastic composite film At present, the domestic test methods of friction coefficient of flexible plastic packaging mainly refer to GB 10006-1988 test method of friction coefficient of plastic film and sheet 3 Sample a brand of rice cake packaging plastic composite film roll 4 In this paper, Labthink Languang mxd-02 friction coefficient instrument is used to test the friction coefficient of the roll film sample of the rice cake packaging Figure 2 mxd-02 friction coefficient tester 4.1 test principle friction coefficient refers to the ratio of the friction between two contacting surfaces and the vertical pressure acting on one of them This equipment is designed based on this principle The device applies the vertical pressure to the two films by the known mass slider, and tests the friction value of the two films in the process from relative static to relative sliding, so as to obtain the static friction coefficient and dynamic friction coefficient between the two contact surfaces 4.2 scope of application (1) This equipment is mainly used to measure the static friction coefficient and dynamic friction coefficient of plastic film and sheet, aluminum foil, aluminum plastic composite film, metal material composite belt for communication cable and optical cable, metal products, rubber, paper, cardboard, woven bag, textile, non-woven fabric, conveyor belt, wood, coating, brake pad, wiper, shoe material, tire and other materials when sliding, and also can be used for cosmetics , eye drops and other daily chemical products (2) This equipment meets many national and international standards, such as ISO 8295, GB 10006, ASTM d1894, TAPPI T816, etc 4.3 equipment parameters equipment load range is 0 ~ 5N, test accuracy is 0.5 level The stroke of the equipment can be divided into 70 mm and 150 mm The standard slider of the device has a mass of 200g, and other quality sliders can be customized according to the needs of users or relevant standards The test speed of the equipment is 100 mm / min or 150 mm / min, and other test speeds can be adjusted as required The dynamic and static friction coefficients of the sample can be measured at the same time in one test The test table and test slider of the equipment are demagnetized and remanence tested, which effectively reduces the test error of the system The professional software can automatically carry out the statistical analysis of single and group test results, reanalysis of original data, superposition and comparison of group curves, and display the test results to customers in a variety of reporting modes intuitively and quickly Support Lystem TM laboratory data sharing system, and manage test reports and test results in a unified way 5 In the test process (1), three pieces of 8 cm × 20 cm and 63 mm × 100 mm test pieces were cut from the roll surface of the sample to form three groups of test samples (2) Take one 8 cm × 20 cm specimen, with the hot cover facing up, and paste or fix it on the horizontal test bench Fig 3 specimen fixing on the horizontal test bench (3) take one 63 mm × 100 mm specimen piece and fix it on the sliding block, with the non hot cover facing outward, that is, the hot cover is in direct contact with the sliding block Fig 4 fixation of the sample on the slide (4) place the slide fixed with the sample on the surface of the sample pasted on the horizontal test bench without impact, and ensure that the test system is not stressed when placed, and the traction direction of the sample is parallel to the sliding direction During the whole process of sample cutting and loading, it is not allowed to touch the test surfaces of the two samples by hand, so as to ensure that the test surfaces of the samples are free of fingerprints, dust, etc Fig 5 the combination of two samples (5) set the test speed, test stroke and other parameter information Click the test option to start the test (6) After 15 s, the two specimens began to move relative to each other The equipment automatically records the change of force value during the test, so as to calculate the static friction coefficient and dynamic friction coefficient of the sample (7) Repeat steps (2) - (6) until the test of three groups of samples is completed 6 Test results the test results of three groups of samples are shown in Table 1 Table 1 test result data table result value sample 1 sample 2 sample 3 average static friction coefficient 0.204 0.198 0.201 0.201 dynamic friction coefficient 0.167 0.161 0.1650.1647 Conclusion friction coefficient is an important performance index of soft plastic packaging In this paper, mxd-02 friction coefficient instrument is used to test the friction coefficient of rice cake packaging roll film The test result is stable and the data is reliable, which can truly reflect the smoothness of packaging materials In addition to the roll film of rice cake packaging, mxd-02 friction coefficient tester can be used to test the friction coefficient of a variety of packaging and products, such as sheet, paper, printed matter, etc it is a testing equipment with a wide range of applications Labthink Languang has always been committed to providing professional testing services and equipment for customers around the world, focusing on solving the problems in packaging for customers, to learn more about Labthink Languang's testing equipment and services, you can log in Jinan Languang company to check the specific information of the equipment or call directly for consultation Jinan Languang Electromechanical Technology Co., Ltd is willing to take this opportunity to enhance technical exchanges and cooperation with enterprises and institutions in the industry