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Coatings 2015, 5(4), 1019-1033; doi:10.3390/coatings5041019

UV-LED Curing Efficiency of Wood Coatings

1
FPInnovations, 319 rue Franquet, Québec City, QC G1P 4R4, Canada
2
NSERC Chair on Ecoresponsible Wood Construction, Laval University, 2425 de la Terrasse st, Québec City, QC G1V 0A6, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Rafael L. Quirino
Received: 1 August 2015 / Revised: 19 November 2015 / Accepted: 3 December 2015 / Published: 18 December 2015
(This article belongs to the Special Issue Coatings and Sustainability)
View Full-Text   |   Download PDF [616 KB, uploaded 18 December 2015]   |  

Abstract

Ultraviolet light emitting diodes (UV-LEDs) have attracted great interest in recent years. They can be used to polymerize coatings, such as those used for prefinished wood flooring. In this project, two lamps were compared for their suitability to be used on a wood flooring finishing line: a UV-microwave and a UV-LED lamp. Low heat emission was found for the UV-LED lamp compared to the UV-microwave one. This study also reveals that the 4 W/cm2 UV-LED lamp used is not powerful enough to cure UV high solids acrylate coatings while satisfactory results can be obtained for UV water-based formulations. In fact, conversion percentages were found to be low for the high solids coatings, leaving the coatings tacky. Higher conversion percentages were obtained for the UV water-based formulations. As a result, mass loss, hardness, and scratch resistance found for the samples cured by UV-LED were closed to the ones found for the samples cured using the UV microwave lamp. View Full-Text
Keywords: UV-LED; UV-curable coatings; wood flooring; acrylates; photoinitiators; mechanical resistance; conversion percentages UV-LED; UV-curable coatings; wood flooring; acrylates; photoinitiators; mechanical resistance; conversion percentages
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Landry, V.; Blanchet, P.; Boivin, G.; Bouffard, J.-F.; Vlad, M. UV-LED Curing Efficiency of Wood Coatings. Coatings 2015, 5, 1019-1033.

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