Epoxy resin is a kind of high polymer, epoxy resin in addition to non-polar plastics such as polyolefin adhesion is not good, for various metal materials such as aluminum, iron, copper; Non-metallic materials such as glass, wood, concrete, etc.; And thermosetting plastics such as phenolic, amino, unsaturated polyester, etc. have excellent bonding properties, so they are known as versatile adhesives. Epoxy adhesive is an important type of structural adhesive.