The development trend of the polyimide industry is improving. In the future, it needs to continue to upgrade in the direction of high-end

Polyimide, abbreviated as PI, refers to a type of polymer containing an imide ring (-CO-NR-CO-) in the main chain. According to different chemical structures, polyimide can be divided into aliphatic polyimide There are three categories: imide, semi-aromatic polyimide, and aromatic polyimide; according to different product forms, they can be divided into polyimides such as films, slurries, foams, resins, fibers, and composite materials; according to the chain Depending on the interaction force, it can be divided into two categories: cross-linked polyimide and non-cross-linked polyimide.

There are four main types of polyimide preparation methods, namely one-step method, two-step method, three-step method and vapor deposition method. The two-step method is currently the mainstream method for preparing polyimide. The preparation process of this method is to use dianhydride and diamine as raw materials to prepare polyamic acid, and then undergo heating or chemical reaction to dehydrate and close the ring in the molecule to generate polyimide. amine.

Polyimide is one of the organic polymer materials with excellent properties. It has strong high temperature resistance, high insulation performance, good low temperature resistance, strong acid resistance, high thermal stability, good solubility, high radiation resistance, dielectric It has the characteristics of good performance and is mainly used in aviation, microelectronics, automobiles, medical care, insulation materials, rail transit, fuel cells and other fields, and has a wide range of applications.

In recent years, against the background of the rapid development of global automobiles, fuel cells, aviation and other fields, the market demand for polyimide has continued to increase and its scale has continued to expand. According to the “Polyimide (PI) Industry Market In-depth Research and Investment Prospects Forecast Analysis Report 2022-2026” released by the Industrial Research Center shows that the global polyimide market demand in 2021 will be 215,000 tons; the market size will be US$2.34 billion, a year-on-year increase of 9.7%.

From the perspective of market segments, polyimide film is currently the mainstream product in the polyimide market and is mainly used in electronics, motors, aerospace, pressure-sensitive tape and other fields. From the perspective of market segmentation, because polyimide film is a technology-intensive industry with high industry entry barriers, and my country’s industry started late, the overall level of my country’s polyimide film industry is currently at par with foreign companies. There is still a big gap in comparison.

After recent years of development, local companies have now achieved localization in the domestic low-end polyimide market. The main companies include Changchun Gaoqi, Damai Technology, Zhuzhou Times, Ruihuatai, Shenzhen Danbang, Jiangsu Aoshen, Jiangsu Xiannuo, etc.; while the domestic high-performance and high-end polyimide market is still dominated by leading foreign companies, including DuPont of the United States, Jongyon Chemical of Japan, and PIAM of South Korea.

Industrial analysts personnel said that polyimide, as one of the organic polymer materials with excellent performance and good comprehensive performance, is currently used in It has been widely used in many fields such as automobiles, medical care, and electronics, and the market demand has been continuously improved, and the industry development prospects are good. However, at present, domestic polyimide companies are still mainly concentrated in the low-end market, and the level of localization in the high-end market is still relatively low. In the future, as the domestic aviation, automobile, and electronic industries continue to upgrade in the direction of high-end, the high-performance polyimide market will Demand will continue to increase, and local companies will need to accelerate the localization process of high-performance polyimide market in the future.