Teijin Carbon America, Inc. (formerly Toho Tenax) Teijin is one of the world’s leading carbon fiber manufacturers with world-wide locations. The carbon fiber business is one of Teijin's strategic fields for sustainable solutions. In addition to carbon fiber and semi-finished carbon fiber-based materials, we also provide solutions. Teijin is developing new fibers, tailored sizings, cost-efficient composites and more. These solutions and innovations significantly reduce waste, lower costs and increase the speed of production. Teijin is a leading global company with locations and production facilities in Japan, Germany and the USA. Rockwood, TN is the corporate office of Teijin Carbon America, Inc. The American market is served from the Rockwood, TN office. Additionally, Rockwood is the American production site for Pyromex® and Tenax® short fibers.