ESTABLISHING THE PATTERNS OF CHANGE IN THE FIRE RESISTANCE OF TENT FABRIC DURING TREATMENT WITH POWDER PAINT

Abstract

This study investigates the process that forms a fire-resis-tant coating based on polyes-ter powder paint on tent fabric. The task addressed is to enable the fire resistance of tent fab-ric when treated with a coat-ing based on polyester pow-der paint. This is important as the production of fire-resistant materials for construction is a relevant task. It has been proven that under the influence of a burn-er flame on a sample of tent fabric treated with a powder coating based on polyester paint, a heat-insulating layer of foam coke of about 4 mm was formed on the surface within 15 s. However, the absence of foam coke was found in some plac-es. A layer of foam coke with a length of more than 50 mm and a width of 20 ÷ 30 formed on the surface of a sample of tent fabric treated with a mixture of polyester powder paint and an intumescent system, while the height of the swelling exceeds 10 mm. This refers the tent fab-ric to flame-retardant materi-als as no burning or smoldering was recorded during the tem-perature exposure, and the tem-perature did not exceed 100°C. Studies have shown that the obtained thermogravimet-ric indicators make it possible to establish the rate of ther-mal decomposition of the coat-ing at certain temperatures and show a qualitative assess-ment of thermal effects and thermal destruction of materi-als, which is characterized by mass loss. Thus, endothermic processes for powder polyester paint begin when 210–290°C is reached with a subsequent intense mass loss of about 70%; when an intumescent system is added, the endothermic effects shift to the region of about 300–340°C with a mass loss of less than 56%. Thus, there is rea-son to argue about the possibil-ity of effectively designing oper-ationally stable biocomposites for construction