1. The top inner wall of a general plastic cover is equipped with a circular leak proof ring; There are also ordinary plastic bucket lids that need to be matched with the inner lid, so there is no need to design a leak proof ring;
2. The lower end of the plastic cover is connected to an anti-theft ring through a tensile reinforcement rib;
3. At the same time, there are several sheet-like gyratory tension wings evenly distributed on the inner wall of the anti-theft ring;
The plastic bucket lid designed in this way has the characteristics of firm sealing, good leak proof and anti-theft performance, safe and convenient use, effective prevention of external contamination of the liquid inside the container, and ensuring that various liquid product packaging meets national safety standards.