An introduction to zipper stop

The zipper was invented by the American machinist Judson in Chicago in 1891. Judson has invented a zipper that can replace his shoelaces in order to get rid of the hassle of tying them every day. The zipper is composed of a row of hooks and a row of buttonholes, which can be fastened one by one by pulling up with an iron slider. In 1893, Judson sent the sample to the Columbia Exposition, where it was well received and patented. Nowadays, the variety of zipper is increasing. Its application is not only in daily necessities, but also in scientific research, medical treatment, military and other fields. In our life, we can find zipper products everywhere, such as zipper pouch, zipper mask, zipper hoodies and so on. It has been hailed as one of the top 10 technological inventions of the 20th century.

The stop is an indispensable part of the zipper. It mainly refers to the top and bottom stops. Different types of zippers have different shapes of stop parts. Square and pin box are used for open end metal zippers. The top stop, bottom stop and pin box can be classified according to material and shape used. They are mainly metal and non-metal. The metal materials are usually aluminum alloy and copper alloy, while the square bolt is made of zinc alloy. The main non-metallic materials are polyoxymethylene and polyester fiber.

Normally speaking, the open end zipper must have top and bottom ends, but not the closed end metal zipper. It depends on the customer's requirements and design. For example, the strip zipper is a complete zipper with top and bottom stops and a zipper puller. The code zipper is a long chain belt, which can be cut according to the user's own needs. And there are no top and bottom stops.

The metal assembled by the zipper machine has three pins on the top stop and five pins on the bottom stop. Semi-automatic or manual assembly of top stop is U-shaped, while bottom stop is I-shaped. Metal top and bottom stops are mainly used in nylon zippers and metal zippers, which are fixed. In addition, there is a movable metal stop, which users can move and fix in the position they need according to their own needs. The top and bottom stops of higher grade metal zippers are colored to match the color of chain teeth.

We can use ultrasonic method to assemble zipper stop. First of all, we need to thread a piece of colored polyester monofilament into the teeth. Then, we should use ultrasonic high frequency vibration to make the top or bottom part of the chain teeth melt together with the monofilament, which forms the top and bottom stops. This method is mainly used in nylon zippers and invisible zippers. For example, ultrasonic stop of nylon zipper can make zipper structure more compact and beautiful.

LONGQI KKK, a zipper manufacturer, also produces zipper stops. Its products are of high quality and it is marching into the world famous enterprises.