Patent application number | Description | Published |
20110243831 | CARBON FIBER PRECURSOR FIBER BUNDLE, PRODUCTION METHOD AND PRODUCTION DEVICE THEREFOR, AND CARBON FIBER AND PRODUCTION METHOD THEREFOR - A production method of a carbon fiber precursor fiber and/or a fiber bundle which permits easy bundling of a plurality of small tows into one bundle, with a dividing capability to divide into the original small tows spontaneously at the time of firing, and is suitable for obtaining a carbon fiber that is excellent in productivity and quality. A production method of carbon fiber precursor fiber and/or a fiber bundle that has a degree of intermingle of 1 m | 10-06-2011 |
20120066866 | CARBON FIBER PRECURSOR FIBER BUNDLE, PRODUCTION METHOD AND PRODUCTION DEVICE THEREFOR, AND CARBON FIBER AND PRODUCTION METHOD THEREFOR - A production method for a carbon fiber precursor fiber bundle and a production apparatus of the carbon fiber precursor fiber bundle. A carbon fiber precursor fiber bundle that has a degree of intermingle of 1 m-1 or less between small tows, consists of substantially straight fibers without imparted crimp, a tow of which straight fibers has a moisture content of less than 10% by mass when housed in a container, and has a widthwise dividing capability to maintain a form of a single aggregate of tows when housed in a container, taken out from the container and guided into a firing step, and to divide into a plurality of small tows in the firing step by the tension generated in the firing step. | 03-22-2012 |
20150184941 | METHOD FOR PRODUCING CARBON FIBER BUNDLE AND HEATING FURNACE FOR CARBON FIBER PRECURSOR FIBER BUNDLE - 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. | 07-02-2015 |
Patent application number | Description | Published |
20120137638 | PACKAGED CARBON FIBER PRECURSOR TOW, AND METHOD AND DEVICE FOR MANUFACTURING SAME - The invention provides a packaged tow being characterized in that a carbon fiber precursor tow ( | 06-07-2012 |
20130340207 | APPARATUS FOR PRESSURE STEAM TREATMENT OF FIBER BUNDLE AND PRODUCING METHOD OF CARBON FIBER PRECURSOR FIBER BUNDLE - Provided is a pressure steam treatment apparatus of a fiber bundle and a producing method of a carbon fiber precursor fiber bundle which are suitable for producing a carbonated precursor fiber bundle which can suppress an influence of a leakage of a pressure steam to the outside of the apparatus so as to hold down a pressure steam supply amount to the minimum, simultaneously reduce a broken yarn, improve a yield ratio and have a high productivity. A pressure steam treatment apparatus ( | 12-26-2013 |
20140123713 | APPARATUS FOR PRESSURE STEAM TREATMENT OF CARBON FIBER PRECURSOR ACRYL FIBER BUNDLE AND METHOD FOR PRODUCING ACRYL FIBER BUNDLE - A pressure steam treatment apparatus according to the invention includes a pressure steam treatment chamber and labyrinth sealing chambers. The labyrinth sealing chambers are respectively arranged on a fiber bundle inlet and on a fiber bundle outlet of the steam treatment apparatus, having a running path of the fiber bundle in a horizontal direction and having plural labyrinth nozzles on top and bottom of the running path. The difference between a maximum value and a minimum value of the distance in the perpendicular direction of the top and bottom side labyrinth nozzles, of a pair of opposing labyrinth nozzles is 0.5 mm or smaller when the ambient temperature of the labyrinth sealing chamber is 140° C. This structure ensures that the energy cost can be reduced, the deformation of the apparatus and also, the raise of fuzz on the fiber bundle and fiber bundle breakage can be prevented at the same time. | 05-08-2014 |
20140161711 | FLAME-RESISTANT HEAT TREATMENT FURNACE - A furnace to flame-resistantly treat a precursor fiber strand by sending hot air to a heat treatment chamber through a hot air blowing nozzle in a direction parallel to a running direction of the strand is provided. The hot air passes through a porous plate and a rectifying member satisfying the following conditions: (1) AB≧4.0; (2) 0.15≦α≦0.35; (3) 0≦B−d≦20; and (4) 80% or more of the area of one opening of the porous plate when facing surfaces of the porous plate and the rectifying member overlap is included in one opening of the rectifying member, where A is the rectifying member hot air passage distance (mm), B is a horizontal maximum distance (mm) of one opening of the rectifying member, α is a rate of hole area of the porous plate, and d is the porous plate equivalent diameter (mm). | 06-12-2014 |
20140232036 | DRY-WET SPINNING DEVICE AND METHOD FOR MANUFACTURING SYNTHETIC FIBER - There is provided a dry-wet spinning device for an acrylic precursor fiber bundle for manufacturing carbon fibers, the device enabling stable spinning by making the coagulability of spun yarn ( | 08-21-2014 |
20150299909 | Horizontal Heat Treatment Device - A horizontal heat treatment device continuously subjects an untreated continuous flat object to heat treatment while horizontally transferring the untreated object within a heat treatment chamber. Seal chambers are interconnected to the untreated-object loading opening and treated-object unloading opening of the heat treatment chamber. A passage is connected to an opening of each of the seal chambers, the opening located on the side opposite the heat treatment chamber. The untreated-object passage loading opening interconnected to the untreated-object seal chamber loading opening and the treated-object passage unloading opening interconnected to the treated-object seal chamber unloading opening are the untreated-object loading opening and treated-object unloading opening of the heat treatment device. A pair of gas ejection nozzles are provided at upper and lower positions of the passages. The nozzles eject gas in specific directions, and the nozzle openings have a specific shape, a direction, and a length. | 10-22-2015 |