**Aseptic Brick Packaging: Ensuring Quality and Safety through Composite Film Testing**
Aseptic brick packaging is widely used in the dairy industry due to its high barrier properties and excellent sealing capabilities, which help maintain the long shelf life of liquid milk and other food products. However, the performance of these packages depends heavily on the composite fastness between the layers of the film. Poor adhesion can lead to delamination, reducing the barrier properties and mechanical strength of the material, and potentially compromising the safety and quality of the packaged product.
To ensure the integrity of aseptic brick packaging, it is essential to monitor the peel strength between the layers. This paper introduces the use of an intelligent electronic tensile testing machine, specifically the XLW (EC) model developed by Jinan Languang Electromechanical Technology Co., Ltd., for measuring the peel strength of aseptic brick films. The testing process follows standard procedures, ensuring accurate and reliable results.
**Significance of Aseptic Packaging**
Liquid milk, including fresh milk, yogurt, and fermented milk, contains high levels of fat and protein, making it susceptible to spoilage. Proper packaging is crucial to protect the product from external contaminants such as oxygen, moisture, and microorganisms. Aseptic bricks are one of the most common packaging formats, using a multi-layered paper-aluminum-plastic composite film that provides excellent protection.
These aseptic packages are produced under sterile conditions, ensuring that the packaging material, the liquid, and the filling equipment are all free from contamination. The result is a product with a long shelf life—typically 6 to 12 months—making it ideal for distribution over long distances.
**Test Standards and Equipment**
In China, the primary standard for measuring the peel strength of composite films is GB 8808-88, which outlines the method for testing the peeling force of soft composite plastic materials. For more detailed and accurate testing, advanced equipment like the XLW (EC) intelligent electronic tensile testing machine is used. This device supports a wide range of tests, including peeling, stretching, tearing, and heat-sealing strength, and is compatible with numerous domestic and international standards.
**Testing Procedure**
The test involves cutting samples of 15 mm in width and 200 mm in length from the aseptic brick film. Each sample is manually pre-stripped at one end for 50 mm before being clamped into the testing machine. The test speed and other parameters are set, and the machine automatically measures the force required to peel the layers apart, providing accurate data on the composite fastness.
**Test Results**
The peel strength of the pure milk aseptic brick composite film was measured at 3.202 N (vertical) and 3.011 N (horizontal), indicating strong adhesion between the layers and a high level of composite fastness.
**Conclusion**
The XLW (EC) intelligent electronic tensile testing machine offers a simple, efficient, and accurate way to evaluate the peel strength of aseptic brick packaging materials. Its versatility and precision make it an essential tool for the dairy industry, helping to ensure the quality and safety of packaged products.
For more information about testing equipment or technical details related to oxygen transmission, heat seal strength, and solvent residues in dairy packaging, you can visit our website or contact us at 0531-85068566 for expert advice. The more you know, the more you trust. Labthink Languang looks forward to collaborating with industry partners to advance packaging technology and improve product safety.
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