The invention relates to the technical field of resin application, in particular to a glass fiber reinforced polybutylene terephthalate and a preparation method thereof. The composite material comprises the following components in parts by weight: 60‑70 parts of polybutylene terephthalate, 25‑35 parts of glass fiber, 3‑10 parts of inorganic rheological agent; coating an epoxy sizing agent on the glass fiber; mixing polybutylene terephthalate pellets with glass fiber, adding an inorganic rheological agent, mixing and extruding by a twin-screw extruder, and preparing glass fiber reinforced polybutylene terephthalate pellets through traction, cooling, drying, pelletizing and other processes; injection-molding the glass fiber reinforced polybutylene terephthalate pellets into splines. The glass fiber treated by the sizing agent in the invention not only has certain stiffness and bundling property, but also can effectively improve the interfacial compatibility between the glass fiber and the matrix resin, thereby improving the mechanical properties of the composite material, and has the characteristics of high tensile strength and high bonding force.
Area Code: CN
Application Number: CN202411502105.7
