Abstract: The high oil and protein content of bacon determines that its packaging materials should have high oxygen barrier properties. This paper uses Labthink VAC-V2 differential pressure gas permeation instrument to test the bacon plastic vacuum packaging bag for external oxygen. Barrier performance, and detailed test procedures and test principles, equipment parameters, etc., provide reference for enterprises to screen oxygen transmission performance test equipment and test methods.
Key words: meat products, bacon, plastic vacuum packaging, oxygen transmission rate, oxygen permeation, barrier properties, bagging, deterioration, gas permeation instrument
1. Status
Bacon is a kind of cured meat. It has been popular in the southern generation. In order to expand the sales area, the company usually uses a soft plastic composite film to vacuum it. It is not only easy to carry but also can extend its shelf life and let more Consumers taste the local specialties. The barrier properties of the soft plastic composite film used in packaging, especially the barrier properties to oxygen, are one of the key factors in the shelf life of bacon. This is because of the high oxygen barrier properties, which can reduce the oxygen in the environment during the storage of bacon. The internal penetration amount prevents the oxygen transmission rate of the package from being too large, which causes the bacon to have gray, dull, inelastic, mildew, mucus, rancid and other quality problems. Therefore, the oxygen barrier properties of the bacon packaging materials should be strengthened. Regular monitoring.
Figure 1 Bacon plastic vacuum packaging
2, testing standards
The domestic oxygen permeability test methods for composite film and sheet packaging include differential pressure method and coulometric method (ie, equal pressure method). The reference method standards are GB/T 1038-2000. Sex test method pressure difference method and GB/T 19789-2005 "Packaging material plastic film and sheet oxidation permeability test coulomb meter detection method". The reference standard in this paper is GB/T 1038-2000.
3, test samples
A vacuum plastic bag for bacon in a food factory.
4, test equipment
Jinan Languang Electromechanical Technology Co., Ltd. independently developed the VAC-V2 differential pressure gas permeation instrument.
Figure 2 VAC-V2 differential pressure gas permeation meter
4.1 Test principle
The VAC-V2 adopts the differential pressure test principle, and the pre-treated sample is placed between the upper and lower test chambers and clamped. First, vacuum treatment is performed on the low pressure chamber (lower chamber), and then the whole system is evacuated; when the specified degree of vacuum is reached, the lower chamber of the test is closed, and the test gas of a certain pressure is filled into the high pressure chamber (upper chamber), and the test gas is ensured. A constant pressure difference (adjustable) is formed on both sides of the sample; thus, the gas will permeate from the high pressure side to the low pressure side under the action of the pressure difference gradient, and the internal pressure of the low pressure side is monitored and processed, thereby obtaining the test sample. Various barrier parameters.
4.2 Scope of application
(1) This equipment is suitable for testing the transmission rate of packaging gases such as plastic film, sheet, paper, cardboard and composite materials, cosmetic hose sheets and various rubber sheets.
Film type: gas permeability test of film materials such as various plastic films, paper-plastic composite films, co-extruded films, aluminized films, aluminum foils, and aluminum foil composite films.
Sheet type: 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, etc., as well as the barrier properties of various films for flammable and explosive gases.
(3) This equipment can meet a number of national and international standards, such as ISO 15105-1, ISO 2556, GB/T 1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003.
4.3 Equipment parameters
Test range: 0.05 ~ 50,000 cm3 / m2 · 24h · 0.1MPa.
Number of samples: 3 pieces (data are independent)
Test temperature range: 5 ° C ~ 95 ° C, temperature control accuracy ± 0.1 ° C; test humidity range: 0% RH, 2% RH ~ 98.5% RH, 100% RH, temperature control accuracy ± 1% RH.
Support for testing of toxic gases and flammable and explosive gases (required restructuring).
Data fitting at any temperature can be performed to easily obtain test results under extreme conditions.
Support LystemTM laboratory data sharing system to manage test results and test reports.
5, the test process
(1) Cut 3 pieces of Φ97 mm sample with a sampler.
(2) Three samples were clamped to the three test chambers of the device.
(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, the test starts, and the instrument automatically calculates and displays the test results.
6, test results
The oxygen permeability of the samples tested in this paper were: 4.91578 cm3/(m2·24h·0.1MPa), 49.3469 cm3/(m2·24h·0.1MPa), 49.9948 cm3/(m2·24h·0.1MPa).
7. Conclusion
VAC-V2 differential pressure gas permeation instrument is a professional oxygen permeability test instrument for food packaging. It has simple operation, high test accuracy and good repeatability. It can reflect the barrier of external vacuum of plastic vacuum packaging bags of bacon products. performance. In order to ensure the good quality of the bacon during the shelf life, in addition to the oxygen transmission rate of the packaging material, it should also strengthen the inspection of key items such as the sealing performance and heat sealing strength of the package. As a leader in the development and manufacturing of packaging inspection equipment, Labthink is committed to providing professional, high-end packaging inspection equipment and testing services to customers around the world. Jinan Languang Electromechanical Technology Co., Ltd. is willing to enhance technical exchanges and cooperation with enterprises and institutions in the industry.
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