The aluminum cap and the bottle mouth constitute the sealing system of the bottle. In addition to the raw materials used in the bottle body and the wall penetration performance of the evaluation itself, the sealing performance of the bottle cap directly affects the quality of the contents in the bottle. Bottle caps can be divided into screw caps and first-pressed caps. Threaded caps use the thread locking method, the cap and the bottle body fall firmly, and the thrust force is large, but it is impossible to judge whether it is tightened from the outside. Press the cap first to visually see whether it is fastened with the bottle body, but its thrust force is relatively high. Small, easy to leak, not easy to hold liquid.
According to the sealing principle of aluminum caps, it can be divided into flat pressure sealing and side wall sealing. The flat pressure seal can only be used in the screw cap. When it is tightened, the contact surface of the Russian sealing ring between the plane of the bottle mouth and the inner plane of the bottle cap increases, so as to achieve the sealing effect. The sealing of the side wall is to use the effective contact between the memory of the bottle mouth and the outer side of the sealing system of the bottle cap to achieve the sealing effect. Screw caps with a sidewall sealing system should be the preferred solution for ordinary grooved caps. For the injection glass cover, it is often a metal cover combined with a rubber stopper, which needs to be designed and selected according to the structure and use of the product as well as the price.
Post time: Jun-25-2023