Recently, JLHX Carbon Fiber Technology Group completed the first batch of 120 tons of 48K large tow carbon fiber raw silk export orders, which has been fully recognized by customers. This is also the first batch of domestic 48K large tow carbon fiber raw silk to go abroad.
In July 2017, the JLHX R & D team began to study 48K large tow carbon fiber precursors. The company draws on the experience of 24K raw silk production, reengineering the raw liquid process, and upgrading key equipment technologies. After one year, in July 2018, the polymerization and spinning process technology of 48K carbon fiber precursors was successfully developed, a kiloton-level 48K carbon fiber precursor technology package was formed, and 48K carbon fiber precursors were trial-produced. From product launch to stable quality, the R & D team of Jilin Chemical Fiber Group has overcome difficulties such as difficult linear density control, uneven washing effect, and unstable raw silk strength.
After the introduction of 48K raw silk, the first time went to JLHX carbonization production line for oxidation and carbonization tests, and the upstream and downstream joint research, from small test, pilot test to batch carbonization, repeated adjustments and verification, and finally achieved 100 bunches on August 17, 2018 48K carbon fiber precursor passed through carbonization smoothly. After testing, the tensile strength of 48K carbon fiber reached 4000Mpa, the tensile modulus reached 240Gpa, and the interlaminar shear strength reached 60Mpa. So far, Jilin Chemical Fiber has produced the first batch of 48K large tow carbon fiber in China.
In order to successfully enter the 48K carbon fiber yarn into the international market and enhance the competitiveness of enterprises, JLHX has continuously optimized the spinning process formula and improved the equipment status, so that the indicators of 48K yarn have been continuously improved. After the small-scale production samples were sent to foreign customers, in January 2019, the first batch of 120-ton export orders were received.
At present, customers report that the carbonization passability and quality indicators of the products fully meet the production requirements, and said that they will sign the next batch of orders with JLHX, which also marks that JLHX Group’s 48 large tow carbon fiber precursors successfully entered the international market.