| abstract |
The present invention relates to sandwich structure composite materials and preparation method thereof.The composite material includes continuous fiber reinforced thermoplastic composite material skinning layer and the discontinuous fiber reinforced thermoplastics being clipped between continuous fiber reinforced thermoplastic composite material skinning layer injection molding laminboard layer；Preparation method is：The raw material of plastic grain is subjected to mixing pelletizing, obtains discontinuous fiber reinforced thermoplastics particle；Continuous fiber reinforced thermoplastic composite material sheet material is shaped to continuous fiber reinforced thermoplastic composite material covering using molding die；It will be embedded into injection mold after continuous fiber reinforced thermoplastic composite material covering preheating after two formation of lots, between discontinuous fiber reinforced thermoplastics particle is injected in two pieces of continuous fiber reinforced thermoplastic composite material coverings again, sandwich structure composite material is formed.Sandwich structure composite material product strength and rigidity prepared by the method for the invention is high, and density is low, light-weight, realizes lightweight, slimming；And it can be molded with 3D. |