Monitoring of the application of laminating adhesives to polyurethane foam by near infrared chemical imaging

  • G. Mirschel
  • O. Daikos
  • C. Steckert
  • T. Scherzer
Leibniz Institute of Surface Engineering (IOM), Chemical Department, Permoserstr. 15, D-04318 Leipzig, Germany

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Leibniz Institute of Surface Engineering (IOM), Chemical Department, Permoserstr. 15, D-04318 Leipzig, Germany

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LLA Instruments GmbH, Justus-von-Liebig-Str. 9/11, D-12489 Berlin, Germany

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 Corresponding Author
Leibniz Institute of Surface Engineering (IOM), Chemical Department, Permoserstr. 15, D-04318 Leipzig, Germany
[email protected]
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Near infrared chemical imaging was used for the quantitative determination of the application weight of hot-melt adhesive layers laminated to polyether-based polyurethane (PUR) foam as well as for monitoring of its spatial distribution across the surface of the foam. Adhesive layers were applied as melt-spun fibrous webs of a thermoplastic polyester with application weights between about 20 g m–2 and 130 g m–2. In spite of the coarsely porous surface structure of the foam, RMSEP was found to be 3.8 g m–2 only. Chemical images of the adhesive layers revealed that a minimum of two adhesive webs corresponding to an application weight of about 40 g m–2 are required for the formation of a continuous layer without holes. Average application weights derived from the chemical images have shown an excellent correlation with gravimetric reference values.


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