The plastic closures&caps generally uses polyolefin as the main raw material and is processed through plastic injection molding, hot pressing and other processes. Plastic anti-theft caps are required to facilitate the opening of consumers, but also need to avoid leakage problems caused by poor sealing performance. How to reasonably control the sealing performance of the plastic cap&closure is the focus of the production unit on-line or off-line detection.

     The plastic caps&closures performance characteristics are as follows: 

     First of all, the inner wall of the top end of the general plastic cap&closure is provided with a ring-shaped leak-proof ring, and there is also an ordinary metal barrel plastic cap which is designed to cooperate with the inner cover, and it is not necessary to design a leak-proof ring;

     Secondly, the lower end of the plastic cap&closure is connected with an anti-theft ring through a tension rib;

     Finally, at the same time, a number of sheet-like swinging pull-force wings are uniformly distributed on the inner wall of the anti-theft ring;

     In conclusion,the plastic bucket cap designed in this way has the advantages of firm sealing, leakage prevention and anti-theft performance, safe and convenient use, can effectively prevent the liquid in the container from external pollution, and can ensure that various liquid product packaging meets the national safety standards and other characteristics.