Abstract: bacon fat and higher protein content of which determine the characteristics of the packaging material should have a high oxygen barrier, use herein of Labthink VAC-V2 Gas Permeability Testing Instrument bacon plastic vacuum bags on the outside of oxygen The barrier performance, and detailed the test process and test principle, 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 , the status quo
Bacon is a kind of cured meat, which 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, which is not only convenient to carry but also can extend its shelf life, so that 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 higher 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 . Sexual 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 vacuumed; 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 packaging gas transmission rate test of plastic film, sheet, paper, cardboard and composite materials, cosmetic hose sheet 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 cm 3 /m 2 · 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 Lystem TM laboratory data sharing system to manage test results and test reports.
5 , the test process
(1) Three pieces of the sample having a size of Φ97 mm were cut by a sampler .
(2) The three samples were clamped in a test chamber 3 devices.
(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: 49.1578 cm 3 /(m 2 ·24h·0.1MPa) , 49.3469 cm 3 /(m 2 ·24h·0.1MPa) , 49.9948 cm 3 /(m 2 ·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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