China's first large tow carbon fiber domestic line was put into use

On October 10, the first domestic production line of China's first 10,000-ton 48k large tow carbon fiber project was put into operation at the carbon fiber industry base of Sinopec Shanghai Petrochemical Company, and qualified products
were produced.
The test results show that the product performance is comparable to the same level of products in the United States, and the quality has reached the international advanced level
.
After several years of breakthroughs in key technologies, China's large tow carbon fiber production has also achieved domestic production of key equipment, truly realizing independent controllability
.

"According to the characteristics of large tows, Sinopec has set a milestone
in the history of carbon fiber construction in China.
" Huang Xiangyu, deputy general manager of Shanghai Petrochemical, said that in order to make the large tow carbon fiber truly have "Chinese technology", Shanghai Petrochemical has tailored a special production line for the large tow from equipment to technology, such as designing the oxidation furnace and carbonization furnace according to the requirements of the large tow, not only successfully mastering the key core technology of controlling the temperature field, but also configuring an energy-saving design to achieve comprehensive utilization of energy, which is unique
in the field of equipment at home and abroad.

According to reports, Shanghai Petrochemical's 10,000-ton 48k large tow carbon fiber project, using polyacrylonitrile (PAN)-based large tow precursors and carbon fiber technology independently developed by Sinopec, is implemented in two stages, and is planned to be completed and put into production in 2024, when it can reach 24,000 tons/year of precursor yarn and 12,000 tons/year of large tow carbon fiber production capacity
.
The 48k large tow carbon fiber domestic production line was completed by CCCC on August 16 this year, which can achieve large-scale and high-quality production
.

The industry usually refers to the number of carbon fibers greater than 48,000 per bundle (referred to as 48K) as large tow carbon fiber
.
China has made breakthroughs in the field of small tow carbon fiber (the number of carbon fiber roots per tow is 1000~12,000), but the high cost of small tow carbon fiber affects the enthusiasm of
downstream enterprises.
Large tow carbon fiber can be greatly increased in single-line production capacity under the same production conditions, and can achieve low-cost production, thus breaking the application limitations
caused by the high price of carbon fiber.

However, carbon fiber technology has strict technical barriers
.
Sinopec organized Shanghai Petrochemical, Shanghai Petrochemical Research Institute, Shanghai Engineering Company, domestic well-known equipment manufacturing enterprises, etc.
, joined hands with more than 10 universities and scientific research institutes such as Beijing University of Chemical Technology and Fudan University, and embarked on a collaborative innovation road combining "production, learning, research and application" with enterprises as the main body, and successfully trial-produced 48K large tow carbon fiber in 2018, and through the whole process of the process, becoming the first domestic and the fourth enterprise
in the world to master the production technology of large tow carbon fiber 。 The carbon content of the large tow carbon fiber produced is more than 95%, the mechanical properties are excellent, the specific gravity is less than 1/4 of steel, the strength is 7~9 times that of steel, and it has the characteristics of corrosion resistance, which can be widely used in wind energy, solar energy, high-speed rail trains, aircraft parts and other fields
.

In addition, Sinopec is not only a research and development and production enterprise of large tow carbon fiber, but also a research and development and application enterprise
of carbon fiber composite materials.
Up to now, Sinopec has 251 carbon fiber related patents and 46 carbon fiber composite patents, ranking first in China and third in
the world.

Sinopec said that it will continue to increase investment in scientific research, accelerate industrial layout, deepen mechanism and system innovation, and promote application scenarios
.
At the end of the "14th Five-Year Plan", Sinopec will achieve a comprehensive breakthrough in various technological processes such as general-grade, large tow, small tow, and high-performance carbon fiber products, and carry out an overall layout to meet the needs
of various fields in the country.