| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass fiber sizing agent made into a glass fiber capable of obtaining a glass fiber-reinforced resin having high mechanical strength when being used as the reinforcing material for a thermoplastic resin, particularly, for a polyamide resin, a glass fiber coated with the glass fiber sizing agent, and a glass fiber-reinforced polyamide resin made of the glass fiber and a polyamide resin.SOLUTION: Provided is a glass fiber sizing agent comprising: a copolymer compound obtained by copolymerizing unsaturated dicarboxylic acid and/or carboxylic acid anhydride of 20 to 60 mass%, methyl acrylate of 20 to 75 mass% and methyl methacrylate of 5 to 20 mass%; aminosilane; and a polyurethane resin, and in which the weight average molecular weight is 10,000 to 60,000. |
