1. The inner wall of the top end of the general plastic cover is provided with an annular leak proof ring; There are also ordinary plastic barrel ends 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 tensile reinforcement;
3. At the same time, on the inner wall of the anti-theft ring, a number of flaky gyratory tension wings are evenly distributed;
The plastic barrel cover designed in this way has the characteristics of firm sealing, good leak proof and anti-theft performance, safe and convenient use, effective prevention of the liquid inside the container from external pollution, and can ensure that various liquid product packages meet the national safety standards.