1, the meaning
Peanut oil is a common edible oil. It is pale yellow in color, smells pure, has a pure taste, and has a high content of unsaturated fatty acids. It has the functions of reducing total cholesterol and harmful cholesterol in the blood, regulating blood lipids, preventing cardiovascular diseases, etc. In addition, peanut oil is rich in peanut oil. Resveratrol, vitamin E, phospholipids and other beneficial substances have anti-inflammatory, antibacterial, anti-oxidant, anti-cancer, and vascular wall protection. Like other fats and oils, peanut oil is an easily oxidized oil. When it comes into contact with enough oxygen during storage and use, auto-oxidation occurs, and some metal ions in heat, light and peanut oil Under the action, it will accelerate the deterioration of this oxidizing rancidity, leading to the destruction of nutrients such as fatty acids in peanut oil, resulting in peroxides, aldehydes, ketones and other harmful substances, and long-term consumption of such oxidized rancid grease will promote aging. , it is likely to induce cardiovascular and cerebrovascular diseases and tumors and other illnesses. Therefore, minimizing the oxygen content in contact with peanut oil is an important measure to prevent the rancidity of peanut oil and ensure good oil quality during storage.
Commonly used packaging materials for edible oils on the market include PET barrels, PE barrels, tin cans, glass bottles, etc., of which the tin cans can meet the storage requirements of edible oils in terms of barrier property or light protection, but the cost is high. . Peanut oil is most commonly packaged in PET barrels, and the bottom or barrel is marked with the number 1 mark.
Figure 1 Edible oil packaging containers of various materials
2, reference standards
At present, there is no detection standard for oxygen permeability of containers in China. The detection process in this paper is based on ASTM F1307-2002 (2007) “Standard Test Method for Determination of Oxygen Permeability of Solid Packages Using a Power Consumption Sensorâ€.
3, test sample
In this paper, a peanut oil barrel for packaging peanut oil production enterprises as a test sample, introduces the detection method of oxygen barrier performance of packaging containers.
4, test equipment
ASTM F1307 stipulates that the oxygen permeability of the packaging container is measured by the equal pressure method. Therefore, this article uses the OX2/230 oxygen permeability testing system independently developed by Jinan Languang Electromechanical Technology Co., Ltd. to test the oxygen barrier performance of the sample.
Figure 2 OX2/230 oxygen transmission rate test system
4.1 Equipment Principle
The OX2/230 Oxygen Permeability Test System uses the principle of isobaric testing. The pre-treated sample is clamped between test chambers. Oxygen or air flows on one side of the membrane. High purity nitrogen is on the other side of the membrane. Flowing, oxygen molecules diffuse through the membrane to the high purity nitrogen on the other side and are carried by the flowing nitrogen to the sensor. The oxygen concentration measured by the sensor is analyzed to calculate parameters such as oxygen permeability. For the packaging container, high-purity nitrogen flows in the container, and air or high-purity oxygen surrounds the container.
4.2 Application
l Films: Suitable for oxygen permeability test of various plastic film, plastic composite film, paper-plastic composite film, co-extruded film, aluminized film, aluminum foil, aluminum-plastic composite film and other film-like materials.
l Sheets: Suitable for oxygen permeability test of various engineering plastics, rubber, building materials and other sheet materials, such as PP sheet, PVC sheet, PVDC sheet and so on.
l Containers: Suitable for testing the oxygen permeability of bottles, bags, cans, boxes, and barrels made of plastic, rubber, paper, paper-plastic composite, glass, metal, etc., such as Coke bottles, peanut oil barrels, Tetra Pak packaging. , vacuum packaging bags, metal three cans, plastic cosmetics packaging, toothpaste hoses, jelly cups, yogurt cups and so on.
l Standard: It can meet many national and international standards such as ISO 15105-2, GB/T 19789, ASTM D3985, ASTM F2622, ASTM F1307, ASTM F1927, JIS K7126-2, YBB00082003, etc.
4.3 Equipment Parameters
l The test range for film samples is 0.01 to 6500 cm3/(m2·d), the resolution is 0.001 cm3/(m2·d), and the test range for containers is 0.0001 to 60 cm3/(pkg·d). With a resolution of 0.00001 cm3/(pkg·d).
l Can test 3 same or different samples at the same time, the system can support parallel connection of up to 10 instruments, and establish an efficient system for 30 samples at the same time.
l Test temperature control range 15 ~ 55 °C, temperature control accuracy of ± 0.1 °C.
l Test humidity control range 0%RH, 35%RH~90%RH, humidity control accuracy ±1%RH.
l Wide-range, high-precision temperature and humidity control range, both sides of the sample can be humidified, to achieve the test under different conditions of temperature and humidity.
l Pressure compensation technology ensures high accuracy and repeatability of test results.
l It can be used together with the water vapor transmission rate test system to form a hybrid test system, which is controlled by a single computer to achieve simultaneous testing of oxygen and water vapor transmission rates.
l Support LystemTM laboratory data sharing system, unified management of test results and test reports.
5, the test process
(1) Fasten and seal the peanut oil barrel sample on the container sealing device with quick-setting glue. After the sealing is completed, clamp it into the equipment, and then use a sealed bag to seal the container and the sealing tray.
Figure 3 sealed sample diagram
(2) Set test parameters such as test temperature, test humidity, etc., and click the test option to start the test.
(3) Adjust humidity and carrier gas flow.
(4) After the test is completed, read the test results automatically calculated by the recording equipment.
6, test results
The oxygen permeability of peanut oil samples tested in this article was 0.8507 cm3/(pkg·d).
7. Conclusion
The high oxygen barrier property of the peanut oil drum is one of the key factors to ensure that the loaded peanut oil maintains high quality in the storage process. The oxygen transmission rate of the peanut oil drums of different materials differs greatly and the monitoring of the oxygen barrier performance is improved. Barrels are important prerequisites for ease of use. OX2/230 Oxygen Transmission Test System has the advantages of high efficiency, high accuracy and good repeatability in testing the oxygen barrier of peanut oil barrels. Labthink is a leader in the packaging testing equipment manufacturing industry and has always been committed to providing professional, high-end packaging testing equipment and intimate and efficient packaging testing services to customers around the world. It meets the needs of packaging testing equipment and services from around the world and is consistent Praise. Learn about related packaging testing equipment and services, you can consult. Jinan Languang Electromechanical Technology Co., Ltd. looks forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry.