What is a resin zipper?

Resin zippers, as one of the three mainstream types of zippers (metal, nylon, and resin), have the core feature that the chain teeth are made of synthetic resin through injection molding. Its materials are mainly divided into two categories: natural resins (such as amber and rosin) and synthetic resins (polyester, epoxy resin, polyoxymethylene, etc.). Among them, the composite formula of polyoxymethylene resin and modified polyurethane resin has become the mainstream, and its performance can be optimized by adding colorants, light-resistant particles and other components.

Structurally speaking, resin zippers are composed of 18 core components such as fabric straps, chain teeth, pullers, upper and lower stops, and tubes/sockets. Among them, the injection molding process of the chain teeth is the key to quality - the polyester plastic beads after dye matching are precisely formed by special equipment to ensure uniform tooth shape and smooth meshing. Compared with the copper/aluminum wire forging of metal zippers and the monofilament winding process of nylon zippers, the injection molding of resin zippers is more likely to achieve complex tooth shapes and rich colors, providing a foundation for functional innovation.