▎ 摘　　要

NOVELTY - A hollow graphene polypropylene thermal insulation fiber comprises 0.1-0.3 pt. wt. graphene powder, 0.8-1.3 pts. wt. temperature-regulating microcapsule, and 98.4-99.1 pt. wt. polypropylene slices. USE - Hollow graphene polypropylene thermal insulation fiber. ADVANTAGE - The thermal insulation fiber can significantly improve the cold insulation and thermal comfort of cold-proof products in low and ultra-low temperature environments, and has good flexibility, excellent electrical conductivity, and excellent thermal insulation, antistatic, antibacterial and other composite functions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the thermal insulation fiber comprising adding graphene powder, temperature-regulating microcapsule and polypropylene slices into the reactor, stirring at speed of 400-600 revolutions/minute for 0.5-1 hour, adding to melt spinning screw extrusion melting machine, and spinning.