SIZING AGENT FOR CARBON FIBER, CARBON FIBER, CARBON FIBER-REINFORCED COMPOSITE MATERIAL, AND METHOD OF PRODUCING CARBON FIBER-REINFORCED COMPOSITE MATERIAL

摘要

A sizing agent for carbon fiber includes a copolyamide dispersed in an aqueous medium and constituted by two or more monomer units selected from nylon 6, nylon 66, nylon 11, nylon 12, and nylon 610. The melting point of the copolyamide is 70 to 160°C. The melting point of the copolyamide when wet is 50 to 120°C.