With the development of human society, economy and science and technology, the zipper has developed from excellent metal materials to non-metallic materials, a single variety and a single function to a multi-variety and multi-specification comprehensive function, from a simple structure to today's delicate and beautiful, colorful, after a long Process of evolution. Its performance, structure, and materials are changing with each passing day, and it has a wide range of uses. It has penetrated into various fields such as aerospace, aviation, military, medical, civil, and other fields. The small zipper plays an increasingly important role in people's lives and shows its importance. Sex and vitality. Zipper, as one of the top ten inventions for human beings in this century, has been included in the history of history.

The zipper is composed of chain teeth, sliders, limit codes (front code and back code) or locking pieces. The fastener element is closed

For the key part, it directly determines the side pull strength of the zipper. Generally, the zipper has two chain belts, and each chain belt has a row of fastener elements, and the two rows of fastener elements are staggered with each other. The slider clamps the fastener elements on both sides, and slides with the aid of the pull tab, so that the fastener elements on both sides can be engaged or disengaged.

The word "zipper" is now popular among men and women in junior high school. It is mainly used to describe a boy who looks like a zipper like a chain, with eighteen bends on a mountain road, a tangled twist like a zipper on the front, and a flat horse on the side like a zipper. Table jokes.

By material

Nylon zipper, resin zipper, metal zipper.　　 1. Nylon zipper: Invisible zipper, double bone zipper, woven zipper, reverse zipper, waterproof zipper, etc.　　 2. Resin zipper: gold (silver) tooth zipper, transparent zipper, translucent zipper, animal energy zipper, laser zipper, diamond zipper.　　 3. Metal zipper: aluminum tooth zipper, copper tooth zipper (brass, cupronickel, bronze, red copper, etc.), black lazy zipper.

Classification by variety

1. Closed end zipper 2. Open end zipper (left and right insertion) 　　 3. Double closed end zipper (X or O) 　　 4. Double open end zipper (left and right insertion) 　　 5. One side open end (left and right insertion, limited nylon and resin, common For the hooded model)

Open zipper. There is no back code at the lower end of the chain and a lock is provided. When the locking member is locked, it is equivalent to a closed zipper. Pull the slider against the locking member to separate the locking member, and the chain belt can be separated. Suitable for clothing or items that often need to be pulled apart. ③ Double zipper. There are two sliders that can be opened or closed from either end. Pull the two sliders against the lock to separate them and they can be fully opened. Suitable for large bags, bedding, tents, etc.