Glass fiber reinforced PBT composite material and preparation method thereof

The invention discloses a glass fiber reinforced PBT composite material and a preparation method of the glass fiber reinforced PBT composite material. The glass fiber reinforced PBT composite material is prepared by mixing the following components in percentage by weight: 40 to 60 percent of polybutylene terephthalate, 8 to 17 percent of styrene-acrylonitrile copolymer, 20 to 40 percent of chopped flat glass fiber, 1 to 5 percent of flexibilizer, 2 to 8 percent of glass bead, 0.1 to 0.5 percent of antioxidant, 0.1 to 0.5 percent of polyester nucleating agent and 0.3 to 1.0 percent of lubricant, wherein the mass ratio of the chopped flat glass fibers to the glass beads is (5: 1)-(10: 1), and the glass fiber reinforced PBT composite material has excellent mechanical properties and ultralow warping degree, and especially solves the problem of warping degree deterioration caused by high temperature. 本发明公开了一种玻纤增强PBT复合材料及其制备方法，以重量百分比计，该玻纤增强PBT复合材料由聚对苯二甲酸丁二醇酯40-60％、苯乙烯-丙烯腈共聚物8-17％、短切扁平玻璃纤维20-40％、增韧剂1-5％、玻璃微珠2-8％、抗氧剂