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Materials 2015, 8(10), 6935-6949; doi:10.3390/ma8105349

Controlled Emissivity Coatings to Delay Ignition of Polyethylene

1
MA—Ecole des Mines d’Alès, 6 avenue de Clavières, Alès 30100, France
2
CERTES, Université Paris-Est, Créteil Val de Marne, 61 Avenue du Général de Gaulle, 94010 Créteil cedex, France
3
Toyal Europe S.A.S.U., Route de Lescun, 64490 Accous, France
*
Author to whom correspondence should be addressed.
Academic Editor: Maryam Tabrizian
Received: 9 June 2015 / Revised: 25 September 2015 / Accepted: 30 September 2015 / Published: 12 October 2015
View Full-Text   |   Download PDF [6238 KB, uploaded 12 October 2015]   |  

Abstract

Semi-opaque to opaque films containing small amounts of various aluminium particles to decrease emissivity were easily prepared and coated onto low-density polyethylene (LDPE) sheets. The thermal-radiative properties (reflectivity, transmissivity and absorptivity) of the films were measured and related to the aluminum particles’ content, size and nature. Time-to-ignition of samples was assessed using a cone calorimeter at different heat flux values (35, 50 and 75 kW/m2). The coatings allowed significant ignition delay and, in some cases, changed the material behaviour from thermally thin to thick behaviour. These effects are related both to their emissivity and transmissivity. A lower emissivity, which decreases during the degradation, and a lower transmissivity are the key points to ensure an optimal reaction-to-fire. View Full-Text
Keywords: thermal-radiative properties; coating; ignition; fire protection thermal-radiative properties; coating; ignition; fire protection
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

Sonnier, R.; Ferry, L.; Gallard, B.; Boudenne, A.; Lavaud, F. Controlled Emissivity Coatings to Delay Ignition of Polyethylene. Materials 2015, 8, 6935-6949.

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