Detection scheme of barrier performance of bacon plastic vacuum packaging bag to external oxygen

Abstract: the high content of oil and protein in bacon determines that its packaging material should have high oxygen resistance In this paper, the Labthink blue light vac-v2 differential pressure gas permeameter is used This paper tests the barrier performance of bacon plastic vacuum packaging bag to external oxygen, and details the test process, test principle, equipment parameters and other contents, which provides a reference for enterprises to select oxygen permeability test equipment and test methods Key words: meat products, bacon, plastic vacuum packaging, oxygen permeability, oxygen permeability, barrier, bulging, deterioration, gas permeameter 1, current situation Bacon is a kind of pickled meat, which has been popular in the southern generation In order to expand the sales area, enterprises usually use soft plastic composite film to pack it in the way of vacuum pumping, which is not only convenient to carry but also can extend its shelf life, so that more consumers can taste local specialty food The barrier performance of the soft plastic composite membrane used for packaging, especially the barrier performance of oxygen, is one of the key factors related to the shelf life of bacon This is because the high oxygen barrier performance can reduce the amount of oxygen in the environment penetrating into the packaging during the storage period of bacon, It is necessary to strengthen the regular monitoring of the anti oxygen performance of the packaging materials for bacon to prevent the quality problems of the meat, such as gray, dull, inelasticity, mildew, mucus, rancidity and so on, due to the high oxygen permeability of the packaging materials Fig 1 vacuum packaging of bacon plastic 2 Testing standards domestic testing methods for oxygen transmittance of composite film and sheet packaging are differential pressure method and coulometric method (i.e isobaric method) The reference method standards are respectively GB / T 1038-2000 plastic film and sheet gas permeability test method differential pressure method and GB / T 19789-2005 Packaging materials - Plastics Films and sheets - Determination of oxidation transmittance - Coulometric method The reference standard of this paper is GB / T 1038-2000 3 The test sample is a vacuum packaging bag of bacon provided by a food factory 4 Test equipment: vac-v2 pressure difference gas permeameter independently developed and designed by Jinan Languang Electromechanical Technology Co., Ltd Fig 2 4.1 test principle of vac-v2 pressure difference gas permeameter First, vacuum the low-pressure chamber (lower chamber), and then vacuum the whole system; when the specified vacuum degree is reached, close the lower chamber for testing, fill the high-pressure chamber (upper chamber) with a certain pressure of test gas, and ensure that a constant pressure difference (adjustable) is formed on both sides of the sample; in this way, the gas will permeate from the high-pressure side to the low-pressure side under the effect of the pressure gradient, and pass By monitoring the pressure in the low pressure side, the barrier parameters of the tested sample can be obtained 4.2 scope of application (1) this equipment is applicable to the test of gas permeability of plastic film, sheet, paper, cardboard and their composite materials, cosmetic hose sheet, various rubber sheets and other packaging materials Film type: gas permeability test of various plastic film, paper plastic composite film, coextrusion film, aluminum coating film, aluminum foil, aluminum foil composite film and other film-like materials Sheet materials: gas permeability test of various engineering plastics, rubber, building materials and other sheet materials, such as PP sheet, PVC sheet, PVDC sheet, etc (2) This equipment is suitable for the permeability test of various gases, such as oxygen, carbon dioxide, nitrogen, air, helium, and the barrier performance test of various films for flammable and explosive gases (3) This equipment can meet many national and international standards, such as ISO 15105-1, ISO 2556, GB / T 1038-2000, ASTM d1434, JIS k7126-1, YBB 00082003 4.3 test range of equipment parameters: 0.05 ~ 50000 cm 3 / M 2 · 24h · 0.1MPa Sample number: 3 pieces (data are independent) test temperature range: 5 ℃ ~ 95 ℃, temperature control accuracy ± 0.1 ℃; test humidity range: 0% RH, 2% RH ~ 98.5% RH, 100% RH, temperature control accuracy ± 1% RH Support the testing of toxic gas and flammable and explosive gas (need to be modified) Data fitting can be carried out at any temperature, and test results under extreme conditions can be easily obtained Support Lystem TM laboratory data sharing system, and manage test results and test reports in a unified way 5 During the test (1) use the sampler to cut 3 pieces of Φ 97 mm specimen (2) Three test specimens are clamped on three test chambers of the equipment (3) Set the sample name, sample thickness, test temperature, test humidity and other parameters (4) Start the vacuum pump (5) Click the "start test" option to start the test, and the instrument will automatically calculate and display the test results 6 Results the oxygen transmittance of the samples tested in this paper were: 49.1578 cm 3 / (m 2.24h · 0.1MPa), 49.3469 cm3 / (m2.24h · 0.1MPa), 49.9948 cm3 / (m2.24h · 0.1MPa) 7 Conclusion vac-v2 pressure difference gas permeameter is a kind of oxygen permeameter used in food packaging It has the advantages of simple operation, high accuracy and good repeatability It can reflect the barrier performance of plastic vacuum packaging bag for bacon products to external oxygen In order to ensure the good quality of bacon in the shelf life, in addition to the oxygen transmittance of packaging materials, we should also strengthen the inspection of key items such as the overall sealing performance and heat sealing strength of packaging Labthink Languang, as the leader of packaging testing equipment R & D and manufacturing industry, has always been committed to providing professional packaging testing equipment and testing services for global customers 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