FEATURES OF REDUCTION OF THERMAL CONDUCTIVITY UNDER TEMPERATURE INFLUENCE ON FIREPROOFFABRIС

Abstract

The analysis of fire-resistant materials for fabrics was carried out and it was established that the paucity of data for explaining and describing the fire protection process, the neglect of elastic coatings, leads to the ignition of fabric structures under the influence of flame. The development of reliable methods of researching the conditions of flame protection of fabrics leads to the creation of new types of flame retardant materials. Therefore, there is a need to determine the conditions for the formation of a barrier for burning and flame propagation through the fabric and to establish a mechanism for inhibiting the transfer of temperature to the material. In the work, canvas fabric, fireproofed with an intumescent coating, was investigated. It has been proven that in the process of thermal impact on the fabric, the process of transfer of high temperature and its ignition takes place. Namely, as the temperature rises, the heat flux density on untreated fabric increases to a value of more than 60 kW/m², which is enough for its ignition. On the other hand, the heat flux density through the intumescent coating at the beginning of the thermal action was more than 20 kW/m², and then the process of formation of the heat-insulating layer of foam coke began and the heat flux density did not exceed 8.2 kW/m², which is not enough for its ignition.