Paper packaging internal valve port plays a key role in the packaging system, and its chemical compatibility with the packaging contents is directly related to the quality and safety of the product.
First of all, understanding the chemical properties of the packaging contents is the basis for compatibility analysis. Different products have different chemical compositions. For example, food may contain acidic substances, oils, moisture, etc.; medicines may contain various active ingredients, excipients, and degradation products that may be produced during storage. For paper packaging internal valve port, its material may be a combination of multiple components such as paper, plastic film, adhesive, etc. If the packaging contents are strongly acidic or alkaline, it may react chemically with certain components in the valve port material, such as corroding paper fibers, degrading plastic films, or destroying the viscosity of adhesives, thereby causing damage to the valve port structure, loss of sealing, and contamination or deterioration of the product.
Secondly, migration phenomenon is an aspect that needs to be focused on in chemical compatibility analysis. During long-term storage, chemicals in the valve port material may migrate into the packaging contents, and vice versa. For example, some plastic additives used in the valve port may migrate out when in contact with food and enter the food, posing a potential threat to human health. Similarly, some components in the packaging contents may also penetrate into the valve port material, changing its physical and chemical properties and affecting the normal function of the valve port. This migration depends not only on the properties of the material itself, but also on environmental factors such as temperature, humidity, and storage time. High temperature and high humidity environments tend to accelerate the migration process and increase the risk of chemical compatibility issues.
Furthermore, compatibility test methods are essential for accurately evaluating the relationship between paper packaging internal valve port and packaging contents. Commonly used test methods include simulation experiments and actual storage tests. Simulation experiments can set specific temperature, humidity, pressure and other conditions in the laboratory, contact the valve port material with samples of packaging contents, and then use chemical analysis methods to detect whether there is material migration, chemical reaction, and changes in valve port performance. The actual storage test is to store the packaged products under normal storage conditions and regularly check the product quality and valve port status. Through these test methods, reliable data on chemical compatibility can be obtained, providing a basis for the selection of valve port materials and packaging design.
Finally, in order to ensure that the paper packaging internal valve port has good chemical compatibility with the packaging contents, full consideration needs to be given at the packaging design stage. Select appropriate valve port materials to enable them to withstand chemical erosion by the package contents while preventing their own components from having adverse effects on the product. In addition, chemical compatibility can be improved by adding barrier layers, improving adhesive formulations, and other measures. For some special products with extremely high requirements for chemical compatibility, such as highly active pharmaceutical preparations, more rigorous and in-depth research and testing are required to ensure the quality and safety of the product throughout the storage and transportation process.
