Issue 50/2015 - Another breakthrough in high-performance carbon fiber technology

At the annual work meeting of the strategic alliance of carbon fiber and composite material industry technology innovation held recently, the Weihai science and technology department organized well-known experts in the industry to conduct an on-site review
of the key technologies for the industrialization of high-strength carbon fiber independently developed by Weihai Expansion Fiber Co.
, Ltd.

Experts unanimously believe that Weihai has achieved a breakthrough in the key technology of the industrialization of the efficient preparation of GQ4522-grade carbon fiber, and has the technical foundation
for building a thousand-ton industrialization production line with higher product performance and larger production capacity.

At the judging site, the 6-spinning raw silk production line is running stably, and the actual spinning speed exceeds 270 m/min
.
After carbonization, the 12K precursor was tested by Beijing University of Aeronautics and Astronautics, and the tensile strength was 5133~5668MPa, the tensile modulus was 236~241GPa, and the elongation was 2.
16%~2.
38%.


According to reports, dry spray wet spinning raw silk preparation technology is one of the key technologies for the industrialization of efficient preparation of carbon fiber, Weihai Expansion has carried out technical research in this area in 2001~2005, and the spinning speed has reached 100 meters / min
.
The company has mastered the key technologies
such as large-scale polymerization reactor design and manufacturing, efficient polymerization process, efficient single and defoaming, rapid low-temperature solidification, ultra-efficient water washing, high-power steam drafting, special oil agent development and oiling process in the preparation process of dry spray wet spinning yarn.
(Ming)