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NEX LS is a scanning multi-element coating analyser that helps maintain routine quality control for web and coil applications. It is a compact, in-line energy dispersive X-ray fluorescence (EDXRF) system. The system provides valuable information about the coating’s properties or the product’s composition. Product quality depends on proper coating thicknesses or coat weight, or the elemental composition of a product.
NEX LS allows continuous monitoring of these without the need to stop production. Featuring advanced third generation energy dispersive X-ray fluorescence (EDXRF) technology, the Rigaku NEX LS represents the next evolution of scanning multi-element process coating analyser. It’s designed for web or coil applications.
Energy dispersive X-ray fluorescence (EDXRF)
To deliver superior analytical performance and reliability, the EDXRF measuring head assembly comes from the established Rigaku NEX Series high-resolution benchtop instrumentation. With their proven technology, the Rigaku NEX LS delivers rapid, non-destructive, multi-element analyses. It measures coat weight, coating thickness and/or composition for elements from aluminium (₁₃Al) through uranium (₉₂U).
Coating thickness and composition
Rigaku NEX LS targets web and coil applications, offering the ability to perform multi-element composition, coat weight or coating thickness. The measuring head is mounts on a rigid beam and features a linear traversing mechanism over a roller, ensuring constant head-to-surface distance. It directly measures the elemental composition of a coating where needed. The system can measure coat weight (or coating thickness) directly, where counting rate for an element is proportional to thickness. Alternatively, it can measure indirectly by assessing the attenuation a substrate element, with counting rate negatively correlated to thickness.
Silicone release coatings
Benchtop EDXRF spectrometers have long been a familiar technology for release coatings, converters, vacuum formed plastics manufacturers and other industries using silicone oils as barrier layers, release coatings or denesting agents. Real-time scanning, for tighter process control tolerances, takes EDXRF technology for silicone coatings analysis to the next level. Silicone coatings are applied to plastic and paper substrates to modify the release characteristics of a product (like labels) or packaging.
By applying too little silicone or if there are areas of the web where the silicone coating is missing, it will adversely affect the adhesive release properties in release applications. Additionally, the denesting characteristics of the vacuum-formed plastic will be compromised, causing product rejection or disruption in manufacturing and other downstream processes. By applying too much silicone, the cost of the manufactured roll increases, reducing profitability and in some cases impacting acceptance and performance of the end product.
