New fire barriers combining the use of two different intumescent paints and a metal laminate structure have been evaluated for the protection of steel. Different bilayer designs have been considered and are composed of an overlay of two intumescent coatings with or without aluminum foils. All laminated bilayers were exposed to fire in a high-temperature environment (116 kW/m²). The design with two aluminum foils and the overlay of both intumescent coatings reveals efficient fire protection with stabilization at low temperatures after 30 min of fire exposure. This design exhibits much higher performance than that of the conventional intumescent coating. Characterizations (cross-sectional observations, expansion measurements, and pull-off tests) were performed for all samples to clarify the mechanism of action. This paper reveals a new way of thinking and highlights that working on the design instead of changing the formulation of the intumescent paint allows us to reach an efficient fire-resistant barrier.

中文翻译：

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双层膨胀型涂料金属层压板：高性能防火屏障的新颖设计

已经评估了结合使用两种不同的膨胀型涂料和金属层压板结构的新型防火屏障，以保护钢。已经考虑了不同的双层设计，并且由两个带有或不带有铝箔的膨胀涂层的覆盖层组成。所有层压双层在高温环境下（116 kW / m ²）。具有两个铝箔和两个膨胀涂层的覆盖层的设计显示了有效的防火保护，并在暴露于火中30分钟后在低温下具有稳定作用。与常规膨胀型涂料相比，该设计具有更高的性能。对所有样品进行了表征（横截面观察，膨胀测量和拉拔试验），以阐明作用机理。本文揭示了一种新的思维方式，并着重指出，通过进行设计而不是改变膨胀型涂料的配方，可以使我们达到有效的防火屏障。