Focused on the field of high-temperature-resistant polyimide (PI) composite materials.
Breakthrough in the temperature resistance grade of polyimide resin: 400°C-grade thermosetting materials now domestically produced.
Mar 22,2026
Polyimide resin, as a flagship high-performance, high-temperature-resistant material, has achieved a breakthrough in its temperature rating, marking significant technological progress for China in the field of advanced materials. In the early stages, polyimide resins represented by PMR-15 typically exhibited temperature ratings in the range of 280–316°C, which was insufficient to meet the demands of higher-temperature environments. With continuous technological advancements, the second-generation AFR-700 series raised the temperature rating to 350–371°C; the third-generation phenylacetylene-terminated resin further pushed the limit to 400–420°C; and the fourth-generation product has now extended the long-term service temperature to 450°C.
In the course of domesticating key materials, enterprises such as AVIC have achieved mass production of 400°C-grade thermosetting polyimide resins through independent innovation. For instance, the HST300/CCF800 composite maintains a longitudinal tensile strength retention rate of 83% at 300°C, demonstrating outstanding high-temperature load-bearing performance. Meanwhile, by optimizing technologies such as in-situ monomer polymerization, wet- and hot-melt prepreg processes, and hot-press molding, challenges like a narrow processing window and difficult forming have been effectively addressed, leading to a significant improvement in material performance stability.
Currently, domestically produced polyimide resins rated for 400°C are widely used in high-temperature components of aero-engines and spacecraft, replacing some imported materials and providing critical support for the independent and controllable development of high-end equipment. This breakthrough has not only narrowed the gap with international advanced levels but also laid a solid foundation for China’s technological accumulation in the field of extreme-environment materials.
Previous article:
Related Recommendations
Scan with WeChat
Telephone:
Contact phone number:
Email:
Address:
No. 1758, Nanhai Road, Demonstration Zone, Jiaozuo City, Henan Province
Yu Public Security Filing No. 41032602000214WhatsApp：8613728636252
General Manager Zhang：+86-13728636252
No total：+86-15839187888
Email：tyty863@163.com