Basic Classification Of Plastic Bottle Caps

1. Screw cap

As the name implies, screw cap means that the cap is connected and matched with the container through its own threaded structure. Thanks to the advantages of the threaded structure, when the screw cap is screwed, a relatively large axial force can be generated through the engagement between the threads, and the self-locking function can be easily realized.

2. Snap cover

The cover that fixes itself on the container through structures such as claws is generally called a snap cover. The snap cover is designed based on the high toughness of the plastic itself.

During installation, the claws of the snap cover can be temporarily deformed when subjected to a certain pressure. Afterwards, under the action of the elasticity of the material itself, the claws quickly return to their original state and hold the mouth of the container tightly, so that the lid can be fixed on the container.

3. Welding cover

Through welding ribs and other structures, a type of lid that directly welds the bottle mouth part on the flexible packaging by means of hot melt is called a welded lid. It is actually a derivative of the screw cap and the snap cap, but the liquid outlet of the container is separated and assembled on the cap.