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Controlled Emissivity Coatings to Delay Ignition of Polyethylene

MA—Ecole des Mines d’Alès, 6 avenue de Clavières, Alès 30100, France
CERTES, Université Paris-Est, Créteil Val de Marne, 61 Avenue du Général de Gaulle, 94010 Créteil cedex, France
Toyal Europe S.A.S.U., Route de Lescun, 64490 Accous, France
Author to whom correspondence should be addressed.
Academic Editor: Maryam Tabrizian
Materials 2015, 8(10), 6935-6949;
Received: 9 June 2015 / Revised: 25 September 2015 / Accepted: 30 September 2015 / Published: 12 October 2015
PDF [6238 KB, uploaded 12 October 2015]


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

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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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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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