Good news came from the NBCL Carbon Fiber Composites Research Institute, which achieved continuous and stable preparation of PAN-based ultra-high modulus carbon fibers with a tensile strength of 3.70 GPa and a tensile modulus of 610 GPa, making another major breakthrough in the field of domestic high-strength high-modulus carbon fibers.
For PAN-based high-strength high-modulus carbon fiber, the two models with the highest tensile modulus are Toray M65J carbon fiber with a tensile modulus of 640GPa (strength 3.50GPa) and Teijin Corporation (former Toho) UM68 fiber. Modulus 650GPa (strength 3.33GPa).
The two carbon fibers M65J and UM68 represent the highest level of PAN-based high-strength high-modulus carbon fiber technology, but no commercial products have been formed. The PAN-based carbon fiber with the highest modulus that has been commercialized is Toray M60J carbon fiber (modulus 588GPa).
In March 2018, NBCL was the first in China to achieve a key manufacturing technology breakthrough for domestic M60J-grade high-strength high-modulus carbon fiber, and key products filled the domestic gap; after nearly two years of unremitting efforts, NBCL has achieved stable production of domestic M60J-grade high-strength high-modulus carbon fiber in small quantities .
On this basis, NBCL researchers have tackled the key preparation technology of higher-grade ultra-high modulus carbon fiber with a tensile modulus of 600 GPa or more. Finally, they have recently achieved a PAN-based ultra-high modulus carbon fiber with a tensile modulus of 610 GPa. Continuous and stable preparation, and the online sampling products have been tested by domestic professional structures to show that the fiber tensile strength is 3.70GPa and the tensile modulus is as high as 610GPa.
Up to now, the highest modulus of the continuous high-modulus carbon fiber products of the high-performance carbon fiber pilot line of the NBCL Special Fibers Division has reached 624GPa (strength 4.36GPa). The successful development of this type of product laid the foundation for the next impact on the highest foreign technology Foundation.