Test method for pendulum impact resistance of zongzi plastic composite film packaging

Abstract: the impact energy of anti pendulum is a performance index to test the flexibility of packaging, which is used to verify the toughness of packaging materials and an important test index of packaging materials In this paper, the impact energy of anti pendulum of plastic composite film for zongzi packaging is tested by fit-01 film impact tester Fit-01 film impact tester is independently developed and designed by Jinan Languang mechanical and Electrical Technology Co., Ltd This paper introduces the principle, parameters and testing process of the instrument to provide a reference for enterprises to test the toughness of packaging materials Key words: anti pendulum impact energy, flexibility, toughness, film impact tester, soft plastic packaging, plastic composite film, zongzi 1, meaning zongzi, also known as "Jiao millet", "tube zongzi" It's made of glutinous rice wrapped with zongzi leaves It's a traditional festival food of Dragon Boat Festival It's said to commemorate Qu Yuan, so it has a strong sense of history and is loved by consumers Nowadays, there are more and more kinds of zongzi, such as hot leg zongzi, egg yolk zongzi, bacon zongzi, fresh meat zongzi, etc., and the circulation time is longer and the area is wider, which puts forward higher requirements for the packaging and storage conditions of zongzi At present, most of the dumplings on the market are packed in vacuum, which can extend the shelf life of dumplings to a certain extent The soft plastic packaging materials used for vacuum packaging should have good flexibility, otherwise, it is easy to be difficult to vacuumize when vacuumizing, poor fitness of the packaging materials or the vacuum degree can not meet the requirements, which will affect the quality assurance effect of the packaging The impact energy of anti pendulum is one of the index parameters to verify the flexibility of packaging materials, so this paper tests the impact energy of anti pendulum of packaging materials to verify its flexibility Fig 1 packaging form commonly used for zongzi 2 The standard for testing the impact energy of plastic composite film against pendulum is GB 8809-1988 test method for impact resistance of plastic film against pendulum, which is applicable to all kinds of plastic films 3 Test sample a brand of zongzi packaging plastic composite film 4 This paper uses Labthink blue light fit-01 film impact tester to test the impact energy of the sample Fig 2 test principle of fit-01 film impact tester 4.1 the equipment is designed according to the principle of energy conservation During the test, the hemispherical punch of the equipment is impacted at a certain speed and passes through the film The energy consumed by the punch is obtained by testing the remaining energy after the punch passes through the sample, so as to evaluate the impact resistance of the film 4.2 scope of application: film type: applicable to the impact energy test of plastic film, sheet and composite film, such as PP / PE composite film, aluminum coating film, aluminum plastic composite film, nylon film, etc for food and drug packaging bags Paper: applicable to the impact energy test of paper and paperboard, such as cigarette pack aluminized paper, Tetra Pak packaging aluminum plastic paper composite material, etc Standard: the equipment meets many national and international standards, such as GB 8809, ASTM d3420, NF t54-116, etc 4.3 there are three ranges of impact energy for equipment parameters, i.e 1 J, 2 J and 3 J, which can be selected, and can be extended to 5 J the test accuracy is 0.001j, which can easily and accurately realize the tests under various test conditions The punch size of the equipment is divided into Φ 25.4mm, Φ 19mm and Φ 12.7mm The clamp diameter of the sample is Φ 89mm and Φ 60mm, which can meet the test requirements of different samples The equipment adopts pneumatic clamping sample, pneumatic release of pendulum and auxiliary system of horizontal adjustment, which can effectively avoid system error caused by human factors The equipment automatically counts and calculates the test data, and displays the test results to the user intuitively Support Lystem TM laboratory data sharing system, and manage test results and test reports in a unified way 5 The test process (1) cut 10 pieces of 100 mm × 100 mm samples from the plastic composite film samples for zongzi packaging Figure 3 select appropriate punch size, clamp diameter and capacity weight for the cut sample piece (2) and place them on the equipment Click from the operation panel of the equipment to enter the "parameter setting" interface to calibrate the equipment (3) Clamp a piece of sample onto the equipment, step on the pneumatic pedal and clamp the sample Fig 4 sample clamping (4) enter the test interface, click the "test" option, and the punch falls down to impact the sample The equipment automatically displays the test results (5) Repeat steps (3) and (4) until all 10 samples are tested 6 The test results show that the punch diameter is 12.7 mm, the clamp diameter is 89 mm, and the capacity weight is 3 J Under the test conditions, the test results of 10 samples were 1.265 J, 1.310 J, 1.263 J, 1.291 J, 1.252 J, 1.276 J, 1.306 J, 1.243 J, 1.285 J and 1.241 J, respectively 7 Conclusion the flexibility of packaging materials has a certain influence on the breaking rate of packaging bags and the fit of vacuum packaging The impact energy of pendulum is one of the indexes to characterize the flexibility of packaging materials In this paper, the anti pendulum impact energy of zongzi packaging was tested by fit-01 film impact tester The test results have good repeatability, high precision, easy operation and high test efficiency The oxygen permeability, sealing performance, heat sealing performance, vacuum degree and other performance of packaging materials are also important factors that affect the quality of zongzi within the shelf life For relevant testing equipment information and services, you can visit Jinan Languang company or call 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.