▎ 摘　　要

NOVELTY - Substrate has a surface of variable infrared emissivity, where at least one surface of the substrate comprises pendent composite sheets fixed to it, and each pendent composite sheet comprises a first surface of higher infrared emissivity and a second surface of lower infrared emissivity. Each pendent composite sheet is independently fixed to the substrate and configured such that each sheet can be moved between a first position in which the first surface of higher infrared emissivity covers a portion of the surface of the substrate and a second position in which the second surface of lower infrared emissivity covers a portion of the surface of the substrate. USE - The substrate is used for (i) dynamic thermal management by controlling the infrared emissivity of the surface of a substrate, or (ii) camouflage technology infrared communication, or (iii) a heat regulating protective cover (all claimed). ADVANTAGE - The substrate uses a material with variable and controllable infrared emissivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an object or article having a surface coated with a substrate having a surface of variable infrared emissivity; and (2) a method of varying the infrared emissivity on a surface of the substrate, comprising moving one or more pendent composite sheets between a first position in which the first surface of higher infrared emissivity covers a portion of the surface of the substrate and a second position in which the second surface of lower infrared emissivity covers a portion of the surface of the substrate, or vice versa.