Polyimide masterbatch products are used for injection molding. The performance reaches the level of similar products in Japan, which is higher than that of similar products in the United States. Due to military use, the US Congress has adopted a strategy of banning the sale of high-end thermoplastic polyimide materials to China, and only low-end products can be sold to China. Thermoplastic polyimide particles can be easily and quickly processed by injection molding and extrusion, and can produce a large number of precision parts and special-sized workpieces, such as extruded rods. It is understood that polyimide rods can be used in nuclear reactors because of their excellent high temperature resistance and nuclear radiation resistance. Polyimide rods used in the nuclear industry need to be about 2 meters long, but polyimide rods imported from abroad are All materials are no more than 1 meter long. In the face of the technology and product blockade of developed countries, my country has encountered many difficulties in developing the nuclear industry, especially nuclear military equipment. After painstaking public relations, our company used our own polyimide pellets to successfully extrude rods. In theory, we can make as long as we need, realizing localization.