Production of bundle of preoxidized fiber

Abstract

Abstract PURPOSE:A bundle of acrylonitrile fiber is subjected to oxidation treatment under specific conditions, the bundle is opened, then further oxidataion treatment is continued to produce preoxidized fiber bundle with no fusing, high strength, high spinnability, thus giving high-strength carbon fiber. CONSTITUTION:When a bundle of acrylonitrile fiber, a tow, is subjected to preoxidation treatment in an oxidative atmosphere such as in the air until the amount of binding oxygen becomes 4.5-8wt%, the treated bundle is abrased preferably at an angle of 25-60 deg. to open the bundle and preoxidation is continued until the amount of binding oxygen becomes more than 15% to produce the objective fiber bundle. The temperature at the opening is preferably 80- 200 deg.C lower than that of the fiber bundle before the opening.

Inventors

• 👤 Minoru Hirai
• 👤 実 平井
• 👤 Kazuo Izumi
• 👤 泉　和雄
• 👤 Kenji Shimazaki
• 👤 賢司 島崎

Bibliographic Details