The invention discloses a reinforced
flame-retardant low-warpage PBT
alloy material and a preparation method thereof. The
alloy material comprises the following components in parts by weight: 35-50 parts of
polybutylene terephthalate, 5-15 parts of
polycarbonate, 15-30 parts of
glass fiber, 5-15 parts of an
inorganic filler, 5-20 parts of a compound
flame retardant, 5-10 parts of a
toughening agent, 0.2-0.4 parts of a compound
antioxidant, 0.1-0.3 parts of a
lubricant, 0.1-0.3 parts of an ester exchange inhibitor, and 0.1-0.3 parts of an anti-dripping agent. The preparation method comprises the following steps: uniformly mixing all the materials except the
glass fiber at a high speed, respectively feeding the mixed material and the
glass fiber into a main feeding hole and a side feeding hole of a double-screw extruder, and finally forming the material. The amorphous
polymer PC is introduced into the raw materials, so that the
crystallinity of the
system is reduced, the warping propertyof the PBT material is improved, and the PBT can be reinforced and toughened; and a compound
flame retardant is introduced, so that the product has a flame-retardant characteristic. Finally, the PBT / PC
alloy material has good mechanical properties, flame retardance and warping resistance, so that the application range of the PBT / PC alloy material in the fields of high-grade electrical components,household electrical shells and the like is expanded.