Polyimide fiber has good application prospects. Cost reduction and efficiency increase are industry trends.

Polyimide fiber (PI fiber), also known as aramid fiber, refers to a fiber containing aroimide in its molecular chain. As a high-performance organic fiber, polyimide fiber has the advantages of excellent spinnability, high and low temperature resistance, dimensional stability, good safety, and long service life. It can be used to produce protective clothing, flame-retardant clothing, heat sealing materials, Insulating materials, etc., downstream applications involve aerospace, petrochemical, medical, electronics, military industry and other fields. The application fields of polyimide fiber are expanding day by day, the market demand continues to grow, and the future market potential is huge.

Polyimide fiber spinning methods include wet spinning, dry spinning, dry-jet wet spinning, electro-jet spinning, etc. Depending on the spinning slurry, the polyimide fiber preparation process is divided into one-step method and two-step method. The two-step method is to prepare polyamic acid fiber through polyamic acid solution, and then undergo chemical cyclization or thermal cyclization. Chemical, thermal drawing, heat treatment and other processes to obtain high-performance polyimide fiber. The two-step method is simple, convenient, easy to control, and has good product performance. It is the main method for large-scale production of polyimide fibers.

Polyimide fiber was first developed by DuPont in the United States. Later, due to its good performance, polyimide fiber attracted great attention from many countries around the world. Polyimide fiber is a strategic new material that the state encourages the development of during the “Twelfth Five-Year Plan” period. After continuous accumulation, my country’s polyimide fiber industry has achieved good results. While the industry scale is expanding, polyimide Fiber properties have also been continuously improved, and high-end polyimide fiber production capabilities have continued to increase.

According to the “2022-2027 China Polyimide Fiber Industry Market In-depth Research and Development Prospects Forecast Report released by the Industrial Research Center It shows that domestic polyimide fiber-related R&D institutions and enterprises include Jiangsu Xiannuo New Material Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Beijing University of Chemical Technology, Jiangsu Aoshen New Materials, Changchun Gaoqi, Keju New Materials, etc.

High-strength and high-module polyimide fiber is a high-end PI fiber. Due to its excellent comprehensive properties, it has always attracted market attention. However, problems such as difficulty in preparation and unstable material precursors limit its production and application. Facing the country’s major needs, domestic companies have begun to focus on technology research and development, performance improvement, cost reduction and efficiency improvement, and application promotion of high-strength and high-modulus polyimide fibers. At this stage, my country has achieved stable batch production of high-strength and high-modulus polyimide fibers, and some products The fiber tensile strength has reached more than 4.5GPa, and the initial modulus has reached more than 180GPa.

Industry analysts said that polyimide fiber has the advantages of excellent spinnability, good safety, and high and low temperature resistance. The application fields are constantly expanding, and the future market development potential is great. my country’s polyimide fiber industry started late, but it is developing rapidly. The supply capacity of high-end products is constantly improving. Against the background of technological progress and demand upgrading, the polyimide fiber industry will develop in the direction of high-end and low-cost.