Using vac-vbs air permeability tester to detect the nitrogen penetration of soft plastic packaging of meat Muffins

Abstract: the packing form of meat muffin is usually filled with nitrogen, which can reduce the oxygen concentration inside the packing and prevent the oxidation and deterioration of meat muffin In this paper, vac-vbs differential pressure gas permeameter was used to test the nitrogen permeability of the packaging of meat muffins, in order to verify its ability to preserve the nitrogen filled in the packaging The test principle, application scope and test process of the equipment were briefly introduced, so as to provide an important basis for enterprises to select the packaging materials for nitrogen filled packaging Key words: nitrogen resistance, preserved nitrogen, nitrogen permeability, differential pressure gas permeameter, meat muffin, pastry, nitrogen filled packaging, air-conditioned packaging 1, significance The outer surface of the meat cake is golden yellow, which is a delicious and famous food of Han nationality It is made of wheat flour, eggs and meat pine It is rich in nutrients, suitable for all ages and loved by consumers The packaging of meat muffins usually adopts the form of nitrogen filled packaging On the one hand, it can prevent the meat muffins from being extruded to deform and break On the other hand, it can also keep the meat muffins in an oxygen free or low oxygen environment, so as to prevent the protein, fat and other components in the meat muffins from being oxygenated, and destroy the environment needed for the growth and reproduction of microorganisms Therefore, nitrogen filled packaging has Anti oxidation, anti mildew and other functions The quality assurance effect of nitrogen filled packaging on meat muffins is mainly related to the nitrogen concentration in the packaging If the nitrogen permeability of the packaging materials is large and the nitrogen loss is large, the nitrogen concentration in the packaging will be reduced, while the oxygen concentration will be increased, which will affect the quality assurance effect of nitrogen filled packaging Fig 1 Main packaging form of meat muffin 2 The current packaging materials commonly used for meat muffin are mainly plastic composite film At present, the detection method of nitrogen transmittance is mainly based on the principle of differential pressure method, and the reference standard is GB / T 1038-2000 test method of gas permeability of plastic film and sheet - differential pressure method 3 Test sample a brand of meat cake packaging plastic composite film 4 In this paper, we use Labthink blue light vac-vbs differential pressure gas osmometer to detect the nitrogen resistance of the sample Fig 2 4.1 test principle of vac-vbs pressure difference gas permeameter 4.1 this equipment is designed by using the pressure difference test principle The test chamber of the equipment is divided into two parts, the upper chamber is high pressure chamber and the lower chamber is low pressure chamber During the test, the two test chambers maintain a constant pressure difference Clamp the sample between the test chamber, open the lower chamber valve, vacuum the low-pressure chamber, and then vacuum the whole system When the specified vacuum degree is reached, close the lower chamber, and fill the high-pressure chamber with a certain pressure of test gas, so that a constant pressure difference is formed on both sides of the sample Under the effect of the pressure difference, the gas penetrates from the high-pressure side to the low-pressure side Through the pressure of the low-pressure chamber Strong monitoring treatment, calculate the gas transmittance of the sample 4.2 scope of application (1) this equipment is applicable to the gas permeability test of various films and sheets Film type: such as all kinds of plastic film, plastic composite film, paper plastic composite film, coextrusion film, aluminum coating film, aluminum foil, aluminum foil composite film and other film-like materials Sheet materials: various engineering plastics, rubber, building materials and other sheet materials, such as PP sheet, PVC sheet, PVDC sheet (2) The equipment can also be extended to the air permeability test of aerospace materials, paper and cardboard, paint film, fiberglass cloth, fiberglass paper, cosmetic hose sheet, various rubber sheets and other materials (3) This equipment is suitable for the transmittance test of various gases, such as oxygen, carbon dioxide, nitrogen, helium, air, etc (4) This equipment meets many national and international standards, such as iso15105-1, iso2556, GB / T 1038, ASTM d1434, JIS k7126-1, ybb00082003 4.3 test range of equipment parameters is 0.1 ~ 100000 cm 3 / M 2 · 24h · 0.1MPa Three samples can be tested at the same time, and the test results are the average of the test results of three samples The temperature range of the sample is 15 ~ 55 ℃, and the temperature control accuracy is ± 0.1 ℃ Provide standard membrane for rapid calibration to ensure the accuracy and universality of test data Support Lystem TM laboratory data sharing system, and manage test results and test reports in a unified way 5 During the test (1), use a sample cutter to cut three 80 mm diameter samples from the sample surface (2) Apply a layer of vacuum grease around the test chamber of the equipment, paste the sample on the test chamber without bubbles, and clamp it with the sample clamping structure According to this method, three pieces of samples are clamped on three test chambers of the equipment Fig 3 completion of sample clamping Fig (3) set the sample thickness, test temperature and other parameter information, click the start test option, start the test, and turn on the vacuum pump (4) The instrument measures the real-time change of the pressure in the low-pressure cavity, and calculates and displays the test results based on it 6 The results showed that the average nitrogen transmittance of the three composite film samples was 110.4901 cm 3 / M 2 · 24 h · 0.1 MPa 7 Conclusion in this paper, vac-vbs differential pressure gas permeation instrument is used to measure the nitrogen gas permeability of the packaging of the plastic compound film of the meat muffin The process of the test is simple, the efficiency is high, the accuracy of the test results is high, the accuracy is reliable, and it can truly reflect the ability of the packaging to preserve the internal gas In addition to nitrogen transmission, oxygen transmission will also have an important impact on the quality of meat muffins Using vac-vbs can also complete the test of oxygen transmission of soft plastic packaging Jinan Languang mechanical and Electrical Technology Co., Ltd has always been committed to providing professional testing equipment and services for customers around the world To learn about other types of testing equipment of Labthink Languang, you can visit Jinan Languang company or call directly for consultation Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry!