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Overview of plastic screw caps

As the name implies, screw cap means that the cap is connected and matched with the container through the screw structure of its own.

Benefiting from the advantages of the thread structure, when the screw cap is tightened, a relatively large axial force can be generated through the engagement between the threads, and the self-locking function can be easily realized. At the same time, some caps that require high positioning accuracy will also use screw caps with threaded structures.

Features: Tighten or loosen the lid by rotating the lid.

Advantages: strong self-locking ability, the cover is not easy to be pulled out, the axial force of the cover is even, which is good for sealing.

Disadvantage: high manufacturing cost

Use occasions: packaging with high sealing requirements and precise positioning requirements