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.

Studies on Flexible Polyurethane Foam With Improved Flame Retardancy

“…OCS, spherical shape was observed in all the samples wit h respect to the unmodified PUF F . Cell window, strut and strut joint were found in all the images with resp ect to the samples additionally confirms developed one at the laboratory level is PUF F [20]. …”

Flame retardant and thermal decomposition properties of flexible polyurethane foams filled with several halogen-free flame retardants

“…Price et al proposed that interaction occurred between MEL and the evolved toluene isocyanate fraction arising from the decomposition of FPUF, and this leads to the suppression of the smoke and CO which mainly originated from toluene isocyanate. Moreover, Bashirzadeh and Gharehbaghi concluded that EG addition in FPUF increased CO/CO 2 rate and MEL reduced smoke generation and CO/CO 2 rate compared with pure FPUF. Gharehbaghi et al also concluded that EG‐loaded FPUF created more CO than MEL‐loaded FPUF and MEL‐loaded FPUF created less toxic gases than EG‐loaded FPUF as well.…”

Analysis on Thermal Hazard of Foam Decoration Materials

“…The Al-containing additive is also discussed in [4], which forms cellulose materials [5] (sample 4 in Table 1) after reaction with oxygen. The Zn-containing one is usually the thermal-resistant hydrate ZnO-H 2 O (sample 4), with similar F R C ( C R 2 5 r u b b e r ) Y e l l o w results coming from [6].…”