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 together with the zipper between the two chains, and the pulling force of the hand produces two components on the triangular object.
In the case of a small angle, the force acting on the sharp corner is large, and the two-part force applies force to the zipper and the component force is greater than the vertical downward force, that is, the component force is greater than the pulling force of the hand, so it is difficult to directly separate The open zipper is easily separated by a triangle.
The zipper is mainly made up of two rows of metal teeth or plastic teeth on the two belts for connecting the edges of the opening (such as clothes or pockets), and a sliding member for two rows of teeth. Pulling in the interlocking position to close the opening; attaching to something (as an object being lifted or dropped) to tighten, stabilize or guide the chain of the object.
The zipper is mainly composed of a chain element, a slider, a top and bottom stop (front and rear code) or a locking member during the production process. The chain element is the key part, which directly determines the side pull strength of the zipper. Generally, the zipper has two chain belts, each of which has a row of fastener elements, and the two rows of fastener elements are staggered. The sliders are clamped on both sides of the fasteners, and the fastener elements on both sides can be engaged or disengaged by the sliders.
The zipper is a very important accessory in clothing, and to a certain extent it has also changed from the past test to the ornament of clothing. Globally, 90% of fashion designers pay attention to the zipper's fashion while paying attention to the zipper's functionality, making it serve the fashion design. Therefore, with the variety of styles, functions, and aesthetics of the clothing design, the zippers that match it are also colorful and varied. How to choose the zipper according to the requirements of the clothing design Choosing the zipper needs to consider the compatibility and harmony with the clothing main materials and styles, as well as its decorative art and economic practicality.
The zipper can be selected according to the strength of the zipper. When considering the strong performance of the zipper, the zipper model is mainly selected. Designed according to the fastener element of the zipper, the material of the fastener determines the shape and basic state of the zipper, especially the softness and feel directly affect the compatibility and aesthetics of the zipper and clothing. For example, the injection zipper is suitable for thicker fabrics. The lightweight zipper of the nylon zipper meets the requirements of thinner fabrics. The metal zipper is thick and sleek, which is especially suitable for denim garments.