The present invention relates to a dyed glass fiber reinforced PBT composite material and its preparation method. The dyed glass fiber reinforced PBT composite material comprises the following components in weight parts: polybutylene terephthalate 50-80 parts; chopped glass fibers 20-50 parts; Compatibilizer 2–6 parts by weight; Composite powder 1–6 parts by weight; Additives 0.5–2 parts by weight; The composite powder is a composite powder of titanium dioxide coated calcium carbonate; The preparation method comprises: First, weighing polybutylene terephthalate, compatibilizer, composite powder, and additives according to the weight ratios, then thoroughly mixing them in a high-speed mixer to obtain a mixture; Then, weigh chopped glass fibers according to the weight ratio; feed the mixture into the main inlet of the twin-screw extruder and feed the chopped glass fibers into the side inlet of the twin-screw extruder; melt and extrude to obtain the dyed glass fiber reinforced PBT composite material. The dyed glass fiber reinforced PBT composite material produced by the present invention exhibits significantly improved mechanical properties and dyeing effects compared to the prior art.
Country Code: CN
Application Number: CN202211678935.6
