Abstract: Meat muffin packaging often uses nitrogen-filled packaging, which has the effect of reducing the oxygen concentration inside the packaging and preventing the muffin from deteriorating. This article uses the VAC-VBS differential pressure gas permeability tester to test the nitrogen permeability of meat muffin packaging to verify its ability to store nitrogen filled inside the packaging, and briefly introduces the test principle, application scope and test process of the equipment, etc. Therefore, it provides an important basis for enterprises to screen packaging materials filled with nitrogen.

Keywords : Nitrogen barrier, Preservation nitrogen, Nitrogen permeability, Gas differential pressure gas permeation meter, Meat muffins, Pastries, Nitrogen-filled packaging, Modified atmosphere packaging

1 , the meaning

The outer surface of the meat muffin is golden yellow and is a delicious and delicious Han Chinese food. It is made from wheat flour, eggs and dried meat. It is rich in nutrients and suitable for all ages. It is loved by consumers.

The packaging of meat muffins often uses nitrogen-filled packaging. On the one hand, it prevents the meat muffins from being deformed and broken when they are squeezed. On the other hand, the muffins can be placed in an oxygen-free or low-oxygen environment to prevent meat muffins. The protein, fat, and other components are oxidized and destroy the environment required for the growth and reproduction of the microorganisms. Therefore, the nitrogen-filled package has the functions of preventing oxidation and preventing mildew. The effect of nitrogen-filled packaging on the quality of meat muffins is mainly related to the concentration of nitrogen in the packaging. If the nitrogen permeability of packaging materials is large, and the amount of nitrogen gas loss is high, the nitrogen concentration inside the packaging will be reduced, and the oxygen concentration It will increase, and then affect the quality of nitrogen packaging effect.

Figure 1 The main packaging form of meat muffins

2 , the status quo

The common packaging material for meat muffins is mainly a plastic composite film. At present, the detection method of nitrogen gas permeability is based on the differential pressure test principle, and the reference standard is GB/T 1038-2000 " Pressure difference method for plastic film and sheet gas permeability test method ".

3 , test sample

A brand of plastic muffin packaging plastic composite film.

4 , testing equipment

This article uses Labthink blue light VAC-VBS differential pressure gas permeability instrument to detect the nitrogen resistance of the sample.

Fig. 2 VAC-VBS Differential Pressure Gas Permeameter

4.1 Test principle

This equipment is designed by using the differential pressure test principle. The test chamber of the equipment is divided into upper and lower two. The upper chamber is a high pressure chamber and the lower chamber is a low pressure chamber. During the test, the two test chambers maintain a constant pressure difference. The sample is clamped between the test chambers, the lower chamber valve is opened, the vacuum chamber is evacuated, and then the entire system is evacuated. After the specified vacuum degree is reached, the lower chamber is closed and the pressure chamber is filled with a certain pressure. The test gas forms a constant pressure difference on both sides of the sample. Under the influence of the pressure difference, the gas penetrates from the high pressure side to the low pressure side. Through the monitoring of the pressure in the low pressure chamber, the gas permeability of the sample is calculated. .

4.2 Scope of application

(1) This equipment is applicable to the gas permeability test of various films and sheets.

(2) The equipment can also be extended to aerospace materials, paper and paperboard, paint film, glass fiber cloth, fiberglass paper, cosmetic hose sheet, various rubber sheets and other materials permeability test.

(3) This device is suitable for testing the permeability of various gases, such as oxygen, carbon dioxide, nitrogen, helium, and air.

(4) The number of devices to meet national and international standards, such as ISO15105-1, ISO2556, GB / T 1038 , ASTM D1434, JIS K7126-1, YBB00082003.

4.3 Equipment Parameters

5 , the test process

(1) Cut 3 specimens with a diameter of 80 mm from the sample surface with a cutter .

(2) Apply a layer of vacuum grease to the periphery of the equipment test chamber. The sample shall be affixed to the test chamber with no air bubbles and clamped with the specimen clamping structure. Three specimens were mounted on the three test chambers of the apparatus in this manner .

Figure 3 sample clamping completed

(3) Set parameters such as sample thickness, test temperature, etc., click to start the test option, start the test, and turn on the vacuum pump.

(4) The instrument measures the real-time changes in the pressure inside the low pressure chamber and calculates and displays the test results accordingly.

6 , test results

The average nitrogen permeability of the three plastic muffin wrap plastic composite membrane samples was 110.4901 cm3/m2·24h·0.1MPa .

7. Conclusion

This article uses VAC-VBS pressure differential gas permeation instrument to test the nitrogen permeability of plastic muffin plastic composite film packaging, the test process is simple, high efficiency, high precision test results, accurate and reliable, can truly reflect the packaging to the internal Gas storage capacity. In addition to the nitrogen permeability, the oxygen transmission rate will also have an important impact on the product quality of meat muffins. Using VAC-VBS can also complete the oxygen permeability test of soft plastic packaging. Jinan Languang Electromechanical Technology Co., Ltd. has always been dedicated to providing professional testing equipment and services to customers around the world. We also understand Labthink other types of detection equipment. You can visit the website of Jinan Languang Company to view or call directly for consultation. Labthink expects to enhance technology exchanges and cooperation with enterprises and institutions in the industry!

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