An Investigation on Reactivity, Mechanical and Fire Properties of Pu Flexible Foam

Abstract

Regarding the increasing demands for the fire resistance polyurethane foam for train and airplane industry and a serious planning to phase out the halogenated flame retardants (FR) because of high and toxic smoke generation, the use of halogen-free fire retardants have been more investigated in recent years. In this work, we have concentrated more on two well-known solid halogen-free fire retardants, expandable graphite, and melamine with two grades of each one and compare their performance in a variety of areas including reactivity, physical and mechanical properties, and fire behaviors and finally the tendency of each FR to have a synergetic effect with each other. The obtained results show that the addition of these two FR affect significantly on reactivity and physical—mechanical properties such as recession factor, expansion factor and compression load deflection (CLD P25/5), sag factor, compression set, tear strength, resilience, and more efficiently on fire behavior of flexible polyurethanes foam.