▎ 摘　　要

NOVELTY - Method comprises (a) extruding and melting polyethylene (PE) by single-screw extruder to obtain cover material melt, (b) extruding and melting polyester master batch by single-screw extruder to obtain core material melt, (c) mixing cover material melt and core material melt, and spraying the melt through a leather-core spinneret plate, and then cooling and solidifying, adopting oiling agent, drawing and heat setting, finally winding and forming to obtain PE fiber, (d) mixing PE fiber and polypropylene (PP) fiber in a cotton mixing machine, and then carding in a carding machine, carding the fiber into single thread, paving into uniform cotton net, (e) conveying the cotton net into a hot air oven, melting the PE fiber by hot air flow to adhere with the PP fiber, forming nonwoven fabric, processing spunlace treatment of the nonwoven fabric, then conveying into the oven for drying treatment, cooling nonwoven fabric by cold air flow and shaping, and obtaining terahertz hot air cotton. USE - The method is useful for preparing terahertz hot air cotton. ADVANTAGE - The method is simple and feasible, and thus convenient for large scale production; and enables to combine the modified graphene powder as a wave-absorbing material with hot air cotton to absorb electromagnetic radiation and reduce electromagnetic reflection, thus convert electromagnetic waves incident on fabric surface into heat, and ensure electromagnetic shielding effect.