▎ 摘　　要

NOVELTY - A composite material comprises 1-20 wt.% graphene-coated metal nanoparticles, 10 wt.% or less nanocarbons, and 70-99 wt.% polymer resin. USE - Composite material e.g. polymer composite material is used in manufacture of fused deposition modeling-type three-dimensional printer polymer filament for forming molding article (all claimed) e.g. electrical and electronic components, kitchen and household containers and toys. ADVANTAGE - The composite material enables economical manufacture of three-dimensional printer polymer filament having simple structure, and excellent strength due to the presence of the polymer resin and durability due to the presence of the graphene-coated metal nanoparticles and carbon nanotubes. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of fused deposition modeling-type three-dimensional printer polymer filament, which involves mixing graphene-coated metal nanoparticles, nanocarbons and biocompatible polymer resin to form a mixture, and extruding and spinning the mixture to form a filament; and (2) polymer composite material, which comprises 1-20 wt.% graphene-coated metal nanoparticles.