▎ 摘　　要

NOVELTY - Sheath-core structure fiber comprises 10 pts. wt. paraffin wax, 0.7-1.5 pts. wt. electromagnetic wave absorber, and 1 pt. wt. high molecular polymer, where the electromagnetic wave absorber comprises ferroferric oxide intercalated graphene oxide, nano-ferroferric oxide, and/or carbon black. USE - The sheath-core structure fiber is used for preparing infrared stealth and radar stealth material, preferably needle felt (all claimed). ADVANTAGE - The sheath-core structure fiber is convenient to use. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the sheath-core structure fiber, which involves (i) melting paraffin, adding electromagnetic wave absorber, and uniformly stirring to a prepare material (I), (ii) melting high molecular polymer, adding to the melt of step (i), completely stirring, uniformly stirring, and drying to prepare a core material (II), (iii) dissolving polyacrylonitrile in N,N-dimethylacetamide, uniformly stirring, and leaving still to prepare an outer phase spinning solution, and (iv) taking the material (II) as core material and the outer phase spinning solution as the sheath layer material, and performing solution spinning to prepare the sheath-core structure fiber with infrared and radar stealth.