Near-infrared hyperspectral imaging of lamination and finishing processes in textile technology

Abstract

This paper highlights the potential of large-area hyperspectral imaging for process and quality control in established manufacturing and modification processes of technical textiles. In particular, it is focused on applications in lamination and impregnation of textiles. In case of lamination, NIR chemical imaging was applied to monitor the thickness of the adhesive layers inside the textile laminates and to detect lamination errors, whereas it was used to monitor the homogeneity of the functional finishes applied by impregnation. In both cases, low application weights ranging from only a few to several tens or hundreds grams per square meter have to be detected, which poses a challenge to the sensitivity of the method.