| abstract |
PROBLEM TO BE SOLVED: To provide a reinforcing fiber sizing agent capable of imparting excellent adhesiveness to a reinforcing fiber used to reinforce a thermoplastic matrix resin, and a synthetic fiber strand and a synthetic fiber using the same. It is in providing the manufacturing method of a strand, and a fiber reinforced composite material. SOLUTION: The present invention is a sizing agent for reinforcing fibers used to reinforce a thermoplastic matrix resin, and a hydrophilic polyamide resin obtained by modifying an N-alkoxymethylated polyamide resin with a hydrophilic vinyl monomer is essential. A sizing agent for reinforcing fibers. [Selection figure] None |