▎ 摘　　要

NOVELTY - Preparing electromagnetic wave shielding thermoplastic polyurethane (TPU) involves putting polytetramethylene ether glycol (PTMEG), 1, 4-butanediol, isocyanate, an antioxidant, a yellowing-resistant agent and a catalyst into a reaction vessel under heating to 85-95?oC and continuously stirring. The material is placed into an oven at 75-85?oC, and then cooled and crushed to form TPU broken blocks. The formed TPU broken blocks are put with graphene nanospheres, the graphite, the glass fibers, the spinel ferrite, the ferrosilicon alloy powder, the foaming agent and the dispersing oil into an internal mixer at 75-85?oC. The graphene nanospheres, the graphite, the glass fiber, the spinel type ferrite, the ferrosilicon alloy powder, the foaming agent and the dispersing oil are placed into an internal mixer under stirring continuously, and then discharged, cooled and crushed to form TPU master batch. USE - Method for preparing electromagnetic wave shielding thermoplastic polyurethane (TPU). ADVANTAGE - The method prepares the electromagnetic wave shielding thermoplastic polyurethane in a simple, cost-effective and eco-friendly manner with good electromagnetic shielding performance. DETAILED DESCRIPTION - Preparing electromagnetic wave shielding thermoplastic polyurethane (TPU) involves putting polytetramethylene ether glycol (PTMEG), 1, 4-butanediol, isocyanate, an antioxidant, a yellowing-resistant agent and a catalyst into a reaction vessel under heating to 85-95?oC and continuously stirring. The material is placed into an oven at 75-85?oC, and then cooled and crushed to form TPU broken blocks. The formed TPU broken blocks are put with graphene nanospheres, the graphite, the glass fibers, the spinel ferrite, the ferrosilicon alloy powder, the foaming agent and the dispersing oil into an internal mixer at 75-85?oC. The graphene nanospheres, the graphite, the glass fiber, the spinel type ferrite, the ferrosilicon alloy powder, the foaming agent and the dispersing oil are placed into an internal mixer under stirring continuously, and then discharged, cooled and crushed to form TPU master batch. The PTMEG, the 1, 4-butanediol, the isocyanate, the TPU master batch, the antioxidant, the yellowing-resistant agent and the catalyst are added into a screw extruder for polymerization and extrusion, and granulated the extruded material to form TPU granules. The TPU granules are put into a film extruder for extrusion to form a TPU sheet, which is placed into a foaming machine for foaming to form the electromagnetic shielding TPU film.