FIBER SIZING AGENT COMPOSITION

摘要

Provided is a fiber sizing agent capable of imparting sufficient sizing properties and fiber spreading properties to reinforced fiber bundles for producing fiber-reinforced composite materials. A fiber sizing agent composition (E) which contains a fiber sizing agent (A), said fiber sizing agent having a viscosity at 35oC of 50-3,000 Pa·s, and has a thixotropic index of 3-15. As the sizing agent (A), an epoxy resin, a polyester rein, a polyurethane resin, a polyether resin and a vinyl ester resin are preferred.