Abstract: Instant noodles, as fried pasta, have higher barrier properties for external packaging to prevent oxidative deterioration of cakes. In this paper, the Labthink VAC-V1 differential pressure gas permeation instrument is used to test the barrier properties of instant cup paper cup material to the outside oxygen, and the test process, test principle and equipment parameters are detailed, so that the enterprise can verify the oxygen barrier performance of the package. Can be referred to.
Keywords: instant noodles, paper cups, cups, oxidation, rancidity, halal, oxygen transmission rate, oxygen barrier, barrier properties, gas permeation meter
1. Status
The main ingredients of instant noodles are wheat flour, palm oil, sauces and dehydrated vegetable leaves, all of which are essential for supplementing human nutrition. The early instant noodles are packaged in plastic composite film or aluminum-plastic composite film. With the development of the times and the changes of the public demand, the packaging of instant noodles has begun to diversify. The increasingly popular paper cup packaging is convenient for consumers to brew instant noodles at any time during the journey.
Oxygen barrier refers to the barrier effect of packaging materials on external oxygen, and is an important factor affecting the shelf life of products. It can be analyzed to solve the problem of oxidative deterioration caused by external oxygen. This paper introduces the method of detecting oxygen barrier properties of instant noodle cup cup packaging materials, and expounds the influence of packaging oxygen barrier performance on products. If the oxygen resistance of the paper cup is poor, the instant noodle products will have a high oxygen transmission rate during the distribution and shelf life of the instant noodles, which will cause the product to suffer from rancidity, odor, mildew and other quality problems. Therefore, food enterprises should strengthen the food quality. Regular testing of the oxygen barrier properties of paper cup packaging.
Figure 1 instant noodle paper cup packaging
2, testing standards
The domestic oxygen permeability test methods for composite film and sheet packaging include differential pressure method and coulometric method (isostatic method). The reference method standards are GB/T 1038-2000 "plastic film and sheet gas permeability". Test Method Differential Pressure Method and GB/T 19789-2005 "Packaging Material Plastic Film and Sheet Oxidation Permeability Test Coulomb Test Method". The reference standard in this paper is GB/T 1038-2000.
3, test samples
Instant noodle paper cups provided by a food factory.
4, test equipment
The VAC-V1 differential pressure gas permeation instrument independently developed by Jinan Languang Electromechanical Technology Co., Ltd.
Figure 2 VAC-V1 differential pressure gas permeation meter
4.1 Test principle
The VAC-V1 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 the test of the permeability of packaging materials such as plastic sheets, films, paper, cardboard and composite materials, cosmetic hose sheets and various rubber sheets.
Film type: gas permeability test of film materials such as various plastic film, plastic composite film, paper-plastic composite film, co-extruded film, aluminized film, aluminum foil, aluminum foil composite film, etc.
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, ASTM D1434, JIS K7126-1, YBB 00082003.
4.3 Equipment parameters
Test range: 0.1 ~ 100,000 cm3 / (m2 · 24h · 0.1MPa).
Number of samples: 1 piece.
Test temperature range: room temperature ~ 50 ° C, temperature control accuracy ± 0.1 ° C.
The test range can be expanded as needed to meet the requirements of large transmittance tests.
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) Use a sampler to cut 3 pieces of Φ65 mm sample from the surface of the cup.
(2) Take one of the pieces and seal the sample on the test chamber with glue.
(3) Set parameters such as sample name, sample thickness, and test temperature.
(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 the other two samples in accordance with the procedures in (2) ~ (5).
6, test results
The oxygen transmission rate of the instant noodle cups tested was: 1207.0238 cm3/(m2·24h·0.1 MPa), 1039.1156 cm3/(m2·24h·0.1 MPa), 1067.0872 cm3/(m2·24h·0.1 MPa).
7. Conclusion
VAC-V1 differential pressure gas permeation instrument is a professional instrument for testing the oxygen transmission rate of film and sheet. It has simple operation, high test accuracy and good repeatability, and can accurately reflect the oxygen barrier property of packaging. In addition to monitoring the oxygen transmission rate, it is also necessary to strengthen the detection of key items such as moisture barrier performance and chemical hygiene performance of the paper cup package. As a leader in the development and manufacturing of packaging inspection equipment, Labthink provides professional, high-end packaging inspection equipment and testing services to customers around the world. Learn about its related testing equipment, you can log in to view. 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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