Process for producing chopped carbon fibers
AssigneeToray Industies, Inc.
InventorsToshiyuki Miyoshi, Haruo Obara, Keizo Ono, Tetsuyuki Kyono
Life of this patent
Estimating the term…
Abstract
Applying a sizing agent as a water dispersed sizing agent to a continuous carbon fiber bundle consisting of 20,000 to 150,000 filaments, controlling the packing density in a range of 5,000 to 20,000 D/mm, cutting the carbon fiber bundle in a wet state of 10 to 35 wt % in solution content at the time of cutting, and drying with vibration at a solution content of 15 to 45 wt % before drying.
Claims14
A process for producing chopped carbon fibers, comprising the steps of applying a sizing agent as a water dispersed sizing agent to a continuous carbon fiber bundle consisting of 20,000 to 150,000 filaments, controlling the packing density in a range of 5,000 to 20,000 D/mm, cutting the carbon fiber bundle in a wet state of 10 to 35 wt % in solution content at the time of cutting, adjusting the solution content to 15 to 45 wt % if needed, and drying with vibration.
Dependencies are inferred from the claim text.