| 摘要 |
PROBLEM TO BE SOLVED: To provide a fiber sizing agent capable of being used for manufacturing a fiber bundle capable of adding excellent strength to a molded article and excellent in sizing property of the fiber.SOLUTION: A fiber sizing agent containing an urethane resin (A) having an alkoxy polyoxy alkylene structure and an epoxy group, a compound (B) represented by the following general formula (1) and an aqueous medium (C) and having Hansen solubility parameters of a solid component in a range of 19.00 to 21.50 J/cm. (1), where R is a hydrocarbon group having 1 to 40 carbon atom or a hydrogen atom, X is -O- or -COO-, A is an alkylene group other than an ethylene group, E is an ethylene group, m is an integer of 0 to 200, n is an integer of 1 to 350 and further a repeating unit containing A and a repeating unit containing E are arranged with random shape or a block shape.SELECTED DRAWING: None |
