The epoxy resin rod is made of glass fiber filaments impregnated with epoxy resin matrix by high temperature pultrusion. The product has: light weight, stable mechanical properties, excellent insulation properties, and can cover a voltage range of 10kV-1000kV. The product's tensile performance is particularly outstanding, and its tensile strength reaches 1360Mpa or above, which greatly exceeds the tensile strength of No. 45 precision cast steel, which is 570Mpa. It provides a reliable basis for the comprehensive dielectric properties of composite insulators.

Epoxy resin rods come in various forms. Various resins, curing agents, and modifier systems can almost meet the requirements of various forms of use, and their ranges can range from extremely low viscosity to high melting point solids. The product has low shrinkage. The epoxy resin and the curing agent used are reacted by direct addition reaction or the ring-opening polymerization reaction of the epoxy group in the resin molecule. No water or other volatile by-products are released. Compared with unsaturated polyester resins and phenolic resins, they show very low shrinkage (less than 2%) during the curing process.

The cured epoxy resin system is an excellent insulating material with high dielectric performance, external leakage resistance, and arc resistance, and it has excellent mechanical properties. The inherent polar hydroxyl groups and ether bonds in the epoxy resin chain make it highly adhesive to various substances. The shrinkage of epoxy resin is low when curing, and the internal stress that occurs is small, which also helps to improve the adhesion strength.

"Epoxy resin is the general term for a class of polymers containing more than two epoxy groups in the molecule. It is a polycondensation product of epichlorohydrin and bisphenol A or polyol. Due to the chemical activity of epoxy group, a variety of compounds containing active hydrogen can be used to open the ring, cure and crosslink to form a network structure, so it is a thermosetting resin. Bisphenol A epoxy resin not only has a large output and a complete variety, but also new modified varieties are still increasing, and the quality is constantly improving.