Non-metallic materials commonly used in the manufacture of spectacle frames are mainly made of synthetic resins and are classified into thermoplastic and thermosetting resins.
1. Celluloid: It is a kind of material used to make glasses very early. It has been rare in the early 21st century. Celluloid has good plasticity, high hardness and can be dyed into various colors. The disadvantage is poor stability and easy corrosion and aging. A camphor smell can be used to identify this material. It is rarely used due to its characteristics such as aging and flammability.
2. Acetate fiber: Compared with celluloid, acetate fiber is not flammable. Generally, the chemical frame is mostly such a material, and according to the processing method, it can be further divided into an injection molding and a plate holder.
3, injection molding: low cost joints, rough, used for low-end sunglasses (heat processing manufacturing).
4, sheet metal frame: made with cold processing, fine, good quality, durable, most of the non-metallic frame is made of sheet material processing carbon crystal frame: characterized by high strength, strong, but the material is brittle, in the winter After the impact collision, it is easy to be brittle, and the method of distinguishing the carbon crystal frame is: there are obvious cutting marks at the temple.
5, epoxy resin: light weight, bright colors, and good elasticity, long life, epoxy resin was first developed by European eyewear companies mainly used to manufacture CD, Dunhill and other brand-name racks. The method of distinguishing epoxy resin is that there is no core at the temple, and the acetate frame has a metal core. In addition, the epoxy frame is brighter in color.