As one of the widely used sealing components nowadays, many industries have certain requirements for the specifications and quality of aluminum-plastic covers. The sealing performance of aluminum-plastic covers is also an important criterion for evaluating their quality. Therefore, improving the sealing performance of aluminum-plastic covers is also a problem that many manufacturers need to solve.
Although natural rubber, as one of the main components of plastic caps, has good comprehensive performance, it still contains some non rubber components such as protein, acetone extract, moisture, ash, etc. As a result, the various properties of plastic caps produced from these natural rubber raw materials may not necessarily meet the requirements of sealing packaging in the pharmaceutical industry. The non breathability of these caps Impermeability and aging stability are not ideal for sealed packaging in the pharmaceutical industry, which may lead to moisture absorption and deterioration of some water sensitive reagents during their storage period.
In order to solve this situation, early pharmaceutical factories adopted the method of not opening aluminum caps, then rolling the caps and applying a layer of paraffin on the outside. However, this method is very cumbersome and labor-intensive, and it also affects the appearance of the external packaging of drugs. Some pharmaceutical factories also apply a layer of polyester film on the outside of the aluminum-plastic cover, which makes the packaging process very complex and cannot be produced on a single assembly line, causing great inconvenience to the entire production process.
Another important thing is to tie the bottle cap. Place the bottle that has been filled with liquid and capped onto a lower tray, and place it on a V-shaped support block. Hold the bottle tightly with one hand and pull the handle backwards and downwards with the other hand. At this time, hold the bottle and lift the tray upwards. After the aluminum-plastic cap and capping head are closed, the three continuously rotating capping blades rotate several times before tightening the bottle cap. It is necessary for the motor to work clockwise. Finally, push the handle forward to return the capped aluminum-plastic cap to its original position along with the tray. The entire operation process is completed, and the above operations can be repeated for each bottle cap rolled in the future.