earticle

영어

In this study, the possibility of explosion of the primer used in the pretreatment of polyurethane(PU) foam for strengthening the adhesion of the wall surface in an enclosed space such as a large-capacity water tank was studied. First, the heat release rate, which is a general thermal characteristic of polyurethane, was measured using a cone calorimeter, and as the polyurethane density increased, the maximum heat release rate(peak) and the total heat release rate(total) increased. The possibility of explosion of the polyurethane primer was compared with the explosive limit of xylene by measuring the concentration of xylene in the vapor by portable GC/MS when spraying the primer with 1×1㎡ plywood inside the container. In addition, the container opening was measured using the wind speed measurement method to measure the change in the concentration of xylene according to the wind speed during natural ventilation to confirm the need for ventilation after the primer work.