Low-Emissivity Camouflage Coatings

摘要

The next generation of low-emissivity camouflage coatings will have signaturemodulating properties in the infrared (IR) bands without sacrificing the visual and near-IR properties and its chemical agent resistant coatings (CARC) nature. This report outlines the major problems facing the coatings chemists/formulators and the use of new instrumentation to define development and evaluation of coating surfaces by particle-size distribution and profile. There are four bands in the electromagnetic spectrum that enemy sensors can use to seek and detect Army tactical equipment. The current camouflage chemical agent resistant coatings (CARC) addresses two of these bands-the visual and near infrared (IR). The three-color woodland pattern and the desert tan match the visual effects of the background. In the near IR, the green color matches the sharp reflectance rise of chlorophyll present in all green foliage. The first camouflage coating to combine the very low gloss in the visual with the chlorophyll-tunnel requirements in the near IR appeared in the mid-1970 as MIL-E-52798 and was based on an oil-modified polyester polymer. In 1985, CARC became the standard camouflage coating for the Army as MIL-C46168. This coating is based on a two-component urethane-polyester polymer and unchanged requirements for visual gloss and IR reflectances. The next generation of low observable coatings requires new formulations that have low emissivity/absorption in the thermal region.