Toughened and modified polyethylene terephthalate composite material and preparation method thereof

The invention provides a high-toughness polyethylene terephthalate (PET) composite material and a preparation method thereof. The composite material comprises a PET matrix, an elastic body, an inorganic nano material and a surface treating agent. The invention adopts a simple method to obtain a soft shell-hard core structure (sandbag structure) of an elastic body covered packing material so as to obtain the composite material with high toughness and high rigidity. The method achieves elastic body/nano calcium carbonate synergistic toughening of the polyethylene terephthalate, enlarges the application range, and reduces the cost of the material.