Abstract: Provided is a carbon fiber manufacturing method including a surface treatment step of ejecting an ozone solution in which ozone is dissolved in solvent from a fluid ejecting port toward a carbon fiber bundle and causing the ozone solution to pass between single fibers of the carbon fiber bundle so as to contact surfaces of the single fibers so that the surfaces of carbon fibers are treated by the ozone solution. Also, provided is a carbon fiber subjected to a surface treatment by the carbon fiber manufacturing method.

Abstract: A loom, containing a first and second fill yarn-holding conveyor rods which are disposed at left and right sides of an opening formed by multiple side-by-side warp yarns that run in one direction at a prescribed speed and are repeatedly inserted into the opening toward center of a weaving width and withdrawn, a single fill yarn conveyor selectively gripped by the ends of the first or second fill yarn-holding conveyor rod, a first and second rod operating units which cause the first and the second fill yarn-holding conveyor rods to be inserted into the opening in a synchronized state and to be withdrawn from the opening, and a first and second fill yarn conveyor gripping and releasing units which are fixed to opposite ends of the first and the second fill yarn-holding conveyor rods and alternately repeat operations of gripping, releasing, and delivering the fill yarn conveyor.

Abstract: The present invention relates to a heating furnace suitable for a step in which a precursor fiber bundle is flameproofed. The heating furnace is provided with a hot air introduction duct disposed in a horizontal space and a heat treating chamber, and in the hot air introduction duct outside the heat treatment chamber, a heating device and a circulation fan for the hot air. The interior of the heat treatment chamber comprises a fiber travel path in which the fiber bundles each having a sheet shape horizontally travels the hot air flowing in a low-temperature region is directed to the high-temperature region side by an air direction change plate to be narrowed and flow in the width direction of the hot air introduction duct As a result, the temperature distribution in the width direction in the treatment chamber can be improved.

Abstract: Provided is a carbon fiber manufacturing method including a surface treatment step of ejecting an ozone solution in which ozone is dissolved in solvent from a fluid ejecting port toward a carbon fiber bundle and causing the ozone solution to pass between single fibers of the carbon fiber bundle so as to contact surfaces of the single fibers so that the surfaces of carbon fibers are treated by the ozone solution. Also, provided is a carbon fiber subjected to a surface treatment by the carbon fiber manufacturing method.

Abstract: The loom comprises: a first and a second fill yarn-holding conveyor rods (14,15), which are disposed to the left and the right of an opening formed by multiple side-by-side warp yarns (Wa) that run in one direction at a prescribed speed and which rods are repeatedly and simultaneously inserted into the opening toward the center of the weaving width and withdrawn; and a single fill yarn conveyor (16) that is selectively gripped by the ends of the rods that face same and is alternately held and conveyed by the first or second fill yarn-holding conveyor rod (14,15). By operating a first and a second rod-operating units (19,20), a first and a second gripping/releasing parts (17,18) are operated via the first and the second fill yarn-holding conveyor rods (14,15) to alternately transfer the fill yarn conveyor (16) at the center of the weaving width, and after the transfer, are shuttled between the entrance of the opening and the center of the weaving width.