Plastic caps are currently commonly used packaging forms for bottles, cans, and barrels, especially in beverage, chemical, and pharmaceutical fields. According to their uses, they can be divided into air-permeable plastic caps and air-impermeable plastic caps. Plastic caps are generally made of polyolefin as the main raw material, and are processed by injection molding, hot pressing and other processes. The plastic anti-theft cover is required to be easy for consumers to open, but also to avoid leakage problems caused by poor sealing performance. How to reasonably control the sealing performance of bottle caps is the focus of online or offline testing by production units.
1. There is a ring-shaped leak-proof ring on the inner wall of the top of the general plastic cover; there are also ordinary plastic bucket covers that need to be matched with the inner cover, so there is no need to design a leak-proof ring;
2, the lower end of the plastic cover is connected with an anti-theft ring through a tension stiffener;
3. At the same time, there are several flaky gyrating pull wings evenly distributed on the inner wall of the anti-theft ring;
The plastic lid designed in this way has the characteristics of firm sealing, leakproof and anti-theft performance, safe and convenient to use, can effectively prevent the liquid in the container from external pollution, and can ensure that the packaging of various liquid products meets the national safety standards.