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Polymers 2018, 10(5), 469; https://doi.org/10.3390/polym10050469

Extraction of the Polyurethane Layer in Textile Composites for Textronics Applications Using Optical Coherence Tomography

1
Institute of Applied Computer Science, Lodz University of Technology, 18/22 Stefanowskiego Street, Lodz 90-924, Poland
2
Institute of Electrical Engineering Systems, Lodz University of Technology, 18/22 Stefanowskiego Street, Lodz 90-924, Poland
*
Author to whom correspondence should be addressed.
Received: 28 February 2018 / Revised: 6 April 2018 / Accepted: 23 April 2018 / Published: 25 April 2018
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Abstract

This article presents a new method for the extraction and measurement of the polyurethane layer of Cordura textile composites using optical coherence tomography. The knowledge of coating layer properties in these composites is very important, as it affects mechanical parameters such as stiffness and bending rigidity. Unlike microscopic measurements, which require cross-section samples of the material, the proposed approach is non-invasive. The method is based on detecting the top and bottom boundaries of the polyurethane layer in Optical Coherence Tomography (OCT) images using image processing methods, namely edge enhancement filtering, thresholding and spline smoothing. The cover layer measurement results obtained from a three-dimensional OCT image of the composite fabric are presented as the thickness maps. The average values of the layer thicknesses measured with the OCT method for four types of Cordura showed a high correlation with the results obtained from microscopic measurements (Pearson correlation coefficient r = 0.9844 ), which confirms the accuracy of the OCT method. View Full-Text
Keywords: composite fabric; polyurethane layer; optical coherence tomography; thickness map; 2D polynomial approximation; 2D spline smoothing composite fabric; polyurethane layer; optical coherence tomography; thickness map; 2D polynomial approximation; 2D spline smoothing
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Gocławski, J.; Korzeniewska, E.; Sekulska-Nalewajko, J.; Sankowski, D.; Pawlak, R. Extraction of the Polyurethane Layer in Textile Composites for Textronics Applications Using Optical Coherence Tomography. Polymers 2018, 10, 469.

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