Foam Core Particleboards with Intumescent FRT Veneer: Cone Calorimeter Testing With Varying Adhesives, Surface Layer Thicknesses, and Processing Conditions (PPT)

摘要

The intumescent FRT Veneer as adhered on no vel foam core particleboard surfaces to provide adequate fire protection were evaluated by means of cone calorimeter tests (ASTM El 354). Foam core particleboards were prepared with variations of surface layer treatment, adhesives, surface layer thicknesses, and processing conditions to provide the test specimen. Ignitability, heat release rate profile, peak of heat release rate, total heat released, effective heat of combustion, mass loss rate, gaseous emissions and specific extinction area were measured using the cone irradiance, 50 kW m-2, as appropriate for panel products. The unprotected foam core panels generally had much higher heatrelease rates, somewhat higher heat of combustion and much higher smoke production due to the polymeric foam component of tested panels, whereas time to ignition and total heat release were not pronounced from the veneer treated boards. Adding commercial fire retardant (EnviroGraph's Intumescent cloth with veneer) to the face particleboard provided a dramatic improvement to the measured flammability properties, with the best FRT performance associated with thicker face layer (5mm), lower press temperature (130C), and adhered with acrylic thixotropic adhesive named Intumescent Adhesive. Such protected foam core particleboard is likely to receive a high flame spread rating that is typical of commercial FRT plywood for both SBI and Steiner Tunnel Tests.