First of all, aluminum foil for blister packaging has excellent moisture-proof performance. Aluminum foil has a highly dense metal crystal structure and can effectively block the penetration of water vapor. In the packaging of products such as medicines and foods that need to remain dry, the moisture-proof performance of aluminum foil is crucial and can significantly extend the shelf life of the product.
Secondly, aluminum foil also has good oxygen barrier properties. Oxygen is one of the main factors causing oxidative deterioration of many products. Aluminum foil for blister packaging can fit tightly to the packaging material to form an effective oxygen barrier, thus protecting the products in the package from oxidation.
In addition, the light-blocking properties of aluminum foil are also very significant. Components of light, such as UV rays, can damage many products, causing problems such as fading of color and changes in texture. Aluminum foil for blister packaging can completely block the penetration of light and provide a dark and safe storage environment for the products in the package.
In practical applications, the barrier properties of aluminum foil for blister packaging are also affected by factors such as its thickness and surface treatment. Generally speaking, the thicker the aluminum foil, the better its barrier properties. At the same time, the barrier properties of aluminum foil can be further enhanced through special surface treatment techniques, such as coating a barrier layer.
It is worth noting that the barrier performance of aluminum foil for blister packaging is not absolute. Under certain extreme conditions, such as high temperature and high pressure, the barrier properties of aluminum foil may be affected to a certain extent. Therefore, when selecting and using aluminum foil, comprehensive consideration should be given to the specific application scenarios and needs.
Aluminum foil for blister packaging plays an important role in the packaging of pharmaceuticals, food and other industries with its excellent barrier properties. With the continuous development of science and technology, the barrier properties of aluminum foil will be further improved and optimized.
