Preparation method of thermoplastic elastomer PP special material with high fluidity and excellent permanent deformation resistance

The invention relates to a preparation method of a thermoplastic elastomer PP special material with high fluidity and excellent permanent deformation resistance. The product related in the invention facilitates low pressure injection moulding and extrusion moulding, is easy for demoulding after moulding, and has a clear product profile. The product also has good impact resistance, weatherability, ultraviolet resistance, heat resistance, oil resistance, chemical resistance, and solvent resistance which are better than those of general chloroprene rubber. The particular preparation method comprises the following steps: adding polypropylene, an elastomer, a softener, an anti-oxidant, an additive into a high speed mixer for mixing, performing melt extrusion by a double screw extruder for granulation, metering and adding a vulcanizer at a glass fiber port position during melt extrusion, and performing vulcanization crosslinking. The invention relates to a formula which comprises 50-80 parts of polypropylene, 20-50