不同背景下棉织物的近红外伪装

Near-infrared camouflage of cotton fabric under different background

针对不同背景,通过染色方法对棉织物进行近红外伪装,测试其反射光谱曲线并与背景曲线相比较,得到模拟背景的最优拼染组合;探讨了防伪机理,并测试其染色牢度.结果表明,单一染料不能很好地模拟背景,4种及4种以上染料组合染色方能最优地模拟背景,使织物具有近红外伪装性能,织物色牢度达到4级以上,符合服用性能.不同树叶的反射特性基本相似,仅反射值高低略有不同,模拟绿色背景的染料组合为蓝CX-1(若树叶偏黄选蓝CX-2)1.5%、黄GCN 2.5%、灰M 0.5%(橄榄R 0.5%),并可加入适量炭黑以降低织物在近红外波段的反射率.枯叶具有相似的反射特性,且梧桐叶正面反射值低于反面,拼染枯叶的染料组合为棕BR 0.3%、黄G0.35%、橄榄R 0.3%、红F3B 0.1%、灰M 0.1%.泥土的反射值较枯叶低,拼染泥土的染料组合为黄G 0.6%、黄GCN 0.7%与棕BR 0.6%,并加入适量炭黑.

Against different background, near-infrared camouflage property was obtained from the dyeing cotton fabric. The reflection spectrum were measured and compared with that of the background, and the optimal combination dyeing of simulating background was gained. Its camouflage mechanism was investigated, and the color fastness was measured. The results indicated that the background couldn＇t be simulated effectively by single dye, only could be simulated perfectly to make the fabric have near-infrared camouflage property by four or more dyes, and its fastness was above 4 grade and met the dressing demand. Different leaves have similar reflection characteristics and little difference in reflection value. The combination dyes of simulating green background were Blue 1.5% of CX-1（Blue CX-2 for yellowier leave）, 2.5% of Yellow GCN, 0.5% Gray M （0.5% of Olive R）, in addition, an amount of carbon black could be added to lower the reflectivity of fabric at near-infrared wave band. Dried leave had similar reflectance characteristics, and the reflection value of face side of chinese parasoltree leave was lower than that of the back side. The combination dyes of dyeing dried leave were 0.3% of Brown BR, 0.35% of Yellow G, 0.3% of Olive R, 0.1% of Red F3B and 0.1% of Gray M. The reflection value of earth was lower than that of the dried leave, the combination dyes of dyeing earth were 0,6% of Yellow G, 0.7% of Yellow GCN, 0.6% of Brown BR and an amount of carbon black.