Aluminum plastic caps are a type of medical and food bottle cap used for sealing oral liquids, bottled infusion fluids, and food packaging. Aluminum cover is an important part of food and drug packaging, and it is also the place where consumers first come into contact with the product. Aluminum plastic caps are widely used in bottled products due to their ability to maintain the airtightness of the contents, as well as their anti-theft opening and safety functions. Aluminum caps are a key product in bottle and container packaging, serving as an upstream industry in the food, beverage, and pharmaceutical industries.
For plastic bottle caps, aluminum-plastic caps have more advantages. The production of aluminum caps can be mechanized and large-scale, and the production cost is low, pollution-free, and recyclable. Plastic caps have high processing costs, low production efficiency during production, poor sealing, and serious environmental pollution, resulting in a decreasing demand; In recent years, the development of aluminum anti-theft covers has overcome the many shortcomings mentioned above, and their demand is showing a trend of increasing year by year.
Although natural rubber has excellent comprehensive properties, due to the presence of certain non rubber components such as protein, acetone extract, ash, moisture, etc., its various properties may not necessarily meet the requirements of drug sealing packaging. Its impermeability, impermeability, and aging stability are not ideal, which is one of the main reasons for the moisture absorption and deterioration of several water sensitive formulations during storage. To make up for this deficiency, pharmaceutical factories have to use non opening aluminum caps, which are then rolled and coated with a layer of paraffin on the outside. This packaging process is cumbersome, not only requiring labor and materials, but also affecting the aesthetic appearance of the drug packaging. For example, in order to improve the sealing and prevent the natural rubber aluminum-plastic cover from affecting the clarity of the large infusion, a layer of polyester film is wrapped outside the aluminum-plastic cover, which leads to complex packaging processes in pharmaceutical factories and cannot form a one-stop assembly line operation.