Patent application number | Description | Published |
20100003515 | POLYACRYLONITRILE POLYMER, METHOD OF PRODUCING THE SAME, METHOD OF PRODUCING PRECURSOR FIBER USED FOR PRODUCING CARBON FIBER, CARBON FIBER AND METHOD OF PRODUCING THE SAME - A polyacrylonitrile-based polymer, containing a polymer of which main component is acrylonitrile, which satisfies at least one kind requirement selected from the following [a] to [d]. | 01-07-2010 |
20100143713 | CARBON FIBER, PROCESS FOR PRODUCTION OF POLYACRYLONITRILE-BASE PRECURSOR FIBER FOR CARBON FIBER PRODUCTION, AND PROCESS FOR PRODUCTION OF CARBON FIBER - A process for producing polyacrylonitrile-base precursor fibers for production of carbon fibers, which comprises spinning a spinning dope containing 10 to 25 wt % of a polyacrylonitrile-base polymer having an intrinsic viscosity of 2.0 to 10.0 by extruding the spinning dope from a spinneret by a wet spinning or a dry wet spinning method, drying and heat-treating fibers obtained by the spinning, and then steam drawing the resulting fibers, wherein the linear extrusion rate of the polyacrylonitrile-base polymer from the spinneret is 2 to 15 m/min. Carbon fibers which are produced by stabilizing-carbonizing treatment of the polyacrylonitrile-base precursor fibers and which have a strand tensile modulus of 320 to 380 GPa and a conduction electron density of 3.0×10 | 06-10-2010 |
20110038788 | CARBON-FIBER PRECURSOR FIBER, CARBON FIBER, AND PROCESSES FOR PRODUCING THESE - A carbon fiber precursor fiber having a weight average molecular weight M | 02-17-2011 |
20120126442 | PROCESSES FOR PRODUCING POLYACRYLONITRILE-BASE PRECURSOR FIBERS AND CARBON FIBERS - A process for producing polyacrylonitrile-base precursor fibers for production of carbon fibers, which comprises spinning a spinning dope containing 10 to 25 wt % of a polyacrylonitrile-base polymer having an intrinsic viscosity of 2.0 to 10.0 by extruding the spinning dope from a spinneret by a wet spinning or a dry wet spinning method, drying and heat-treating fibers obtained by the spinning, and then steam drawing the resulting fibers, wherein the linear extrusion rate of the polyacrylonitrile-base polymer from the spinneret is 2 to 15 m/min. | 05-24-2012 |
20140329075 | SIZING AGENT-COATED CARBON FIBERS, PROCESS FOR PRODUCING SIZING AGENT-COATED CARBON FIBERS, PREPREG, AND CARBON FIBER REINFORCED COMPOSITE MATERIAL - Sizing agent-coated carbon fibers includes: a sizing agent including an aliphatic epoxy compound (A) and at least containing an aromatic epoxy compound (B1) as an aromatic compound (B); and carbon fibers coated with the sizing agent, wherein the sizing agent-coated carbon fibers have an (a)/(b) ratio of 0.50 to 0.90 where (a) is a height (cps) of a component at a binding energy (284.6 eV) assigned to CHx, C—C, and C═C and (b) is a height (cps) of a component at a binding energy (286.1 eV) assigned to C—O in a C | 11-06-2014 |
Patent application number | Description | Published |
20130089736 | METHOD FOR PRODUCING SIZING AGENT-COATED CARBON FIBERS, AND SIZING AGENT-COATED CARBON FIBERS - Disclosed is a method for producing carbon fibers which exhibit excellent adhesion to a matrix resin and have excellent processability. Specifically disclosed is a method for producing a sizing agent-coated carbon fibers, wherein at least one kind of sizing agent that is selected from the group consisting of sizing agents (a), (b) and (c) described below is used for coating, in each of said sizing agents a bi- or higher functional epoxy compound (A1) and/or an epoxy compound (A2) being used as a component (A), and said epoxy compound (A2) having a mono- or higher functional epoxy group and at least one functional group that is selected from among a hydroxyl group, an amide group, an imide group, a urethane group, a urea group, a sulfonyl group and a sulfo group. The method for producing a sizing agent-coated carbon fibers is characterized in that the sizing agent is applied to carbon fibers and the resulting is subjected to a heat treatment within the temperature range of 160-260° C. for 30-600 seconds. (a) A sizing agent which is obtained by blending at least 0.1-25 parts by mass of a tertiary amine compound and/or tertiary amine salt (B1) having a molecular weight of 100 g/mol or more per 100 parts by mass of the component (A), said tertiary amine compound and/or tertiary amine salt (B1) being used as a component (B). (b) A sizing agent which is obtained by blending at least 0.1-25 parts by mass of a quaternary ammonium salt (B2) having a cationic moiety represented by general formula (I) or (II) per 100 parts by mass of the component (A), said quaternary ammonium salt (B2) being used as a component (B). (In the formulae, R | 04-11-2013 |
20140342144 | CARBON FIBER FORMING RAW MATERIAL, FORMED MATERIAL, AND CARBON FIBER-REINFORCED COMPOSITE MATERIAL - The carbon fiber forming raw material is a carbon fiber forming raw material (Z) as a prepreg including sizing agent-coated carbon fibers and a thermosetting resin or a carbon fiber forming raw material (Y) as a forming material that includes sizing agent-coated carbon fibers and has a woven fabric form or a braid form. The sizing agent includes components (A) and (B). The component (A) is an epoxy compound having two or more epoxy groups or two or more types of functional groups. The component (B) is one or more compounds selected from the group consisting of a tertiary amine compound, a tertiary amine salt, a quaternary ammonium salt, a quaternary phosphonium salt, and a phosphine compound. The component (B) is contained in an amount of 0.1 to 25 parts by mass relative to 100 parts by mass of the component (A). | 11-20-2014 |