Do you know the working principle and classification of zippers?

Zippers are everywhere, from our pants and jackets to sleeping bags and backpacks. They are much more convenient than a row of buttons or snaps, and can be opened and closed in seconds. For these conveniences, zippers are often used in various products around the world. Do you know the working principle and classification of zippers?

The working principle of zipper

The working principle of the zipper is generally explained by the principle of resultant force and component force. When the zipper is opened, the triangular object moves with the zipper between the two chains, and the pulling force of the hand produces two component forces on the triangular object;

When the included angle is small, the force acting on the sharp corner is very large. The two-component force exerts force on the zipper and the component force is greater than the resultant vertical downward force, that is, the component force is greater than the pull of the hand, so it is difficult to separate directly The opened zipper is easily separated by triangles.

Different types of zippers

In daily life, four common zippers can be found in a series of products. The following are the names of each type of zipper and its most common uses:

Separate zipper (open type)

Separate zippers are usually used on jackets, vests and other outerwear. When the zipper is completely unzipped, the two sides of the tape can be completely separated. The split zipper has an insert pin and a fixed box at the end. These zippers play a particularly important role when closing the zipper of a jacket or other outerwear, because if the pins are not correctly inserted into the fixing box, the zipper will not work properly.

Closed zipper

The trousers and leather boots in the closet, the zippers you see on these products are closed zippers. This type of zipper will not separate at the bottom. A closed zipper is located at the bottom of the tooth. This is a separate part, and unlike a detached zipper, it does not allow the two sides of the tape to separate.

Dual-purpose split zipper

Two-way isolation zippers can be found on sleeping bags, raincoats and winter coats. These zippers allow items to be fully opened at the top, but also at the bottom. Two-way zippers are especially common in winter parkas. They are convenient when you are sitting or driving because the bottom zipper can be unfastened to remove any restrictions, and the jacket can be opened to provide more space.

Dual-purpose head-to-head zipper

It mainly used on backpacks and travel bags. When completed, these zippers will have two face-to-face sliding buttons in the center of the teeth or on one side of the bag. There are two stoppers at the ends of the two zippers, they cannot be separated, so the sides of the two straps remain connected like closed zippers.

Follow us to learn more about zipper slider and puller, slider zipper bags and metal zipper slider.