Epoxy resin rods have the characteristics of light weight, high strength, large modulus, good corrosion resistance, excellent electrical properties, wide sources of raw materials, simple processing and molding, high production efficiency, etc., and have material designability and other special properties, such as Vibration reduction, noise reduction, electromagnetic wave penetration, stealth, and ablation resistance have become important materials that cannot be replaced in the national economy, national defense construction, and scientific and technological development. The most commonly used resins in thermosetting resin-based composites are still phenolic resins, unsaturated polyphenol resins and epoxy resins, the three major thermosetting resins.

There are many types of epoxy resin rod composite materials (epoxy composite materials, also called epoxy reinforced plastics), and their names, meanings and classification methods are not completely unified, but in general they can be classified according to the following methods.

(1) According to the purpose, it can be divided into epoxy structural composite material, epoxy functional composite material and epoxy functional structural composite material. The structural composite material is a composite of the mechanical properties of the constituent materials, so that it can be used as a stressed structural material, and the material can be designed and manufactured according to the stressed condition to achieve a good state of material performance. Functional composite materials are composite materials with other properties (such as light, electricity, heat, corrosion resistance, etc.) to obtain materials with a certain ideal function. For example, epoxy resin copper clad laminate, epoxy resin electronic plastic packaging material, radome, etc. What needs to be pointed out is that no matter what kind of functionality of the material is used, it must have the necessary mechanical properties, otherwise no matter how good a functional material is, it will not be practical. There are already some functional materials that require high strength at the same time, such as high-voltage insulator core rods, which require high insulation and strength, and are a kind of insulating structural composite material.

(2) According to the molding pressure, it can be divided into high-pressure molding materials (molding pressure 5-30MPa), such as epoxy engineering plastics and epoxy laminate plastics; low-pressure molding materials (molding pressure <2.5MPa), such as epoxy glass fiber reinforced plastics and high-pressure molding materials. Performance epoxy composite material. FRP and high-performance composite materials are not suitable for high-pressure forming due to the large size of the parts (up to several square meters) and the surface is usually not flat. Otherwise, the mold cost is too high, the press tonnage is too large, and the cost is too expensive.

(3) According to the characteristics of epoxy composite material's performance, molding method, product and application field, and taking into account the habitual name, it can be divided into: epoxy resin engineering plastic, epoxy resin laminated plastic, epoxy resin Glass fiber reinforced plastic (general epoxy resin composite material) and epoxy resin structural composite material.