Fire Performance of Ultra-Low Density Fiberboard (ULDF) with Complex Fire-Retardants

Abstract

To clarify how the fire performance of ultra-low density fiberboard (ULDF) can be improved by complex fire-retardants, the limiting oxygen index (LOI) and microstructure of ULDFs with different additive amounts of complex fire-retardants was analyzed. The char yield, chemical bonding, and thermostability of ULDFs treated by different temperatures were also tested. Results showed that the LOI values and compactness of ULDFs were increased with increased amounts of fire-retardants. Three steps of char yield curves in control fiberboard (CF) and mixed fiberboard (MF) were apparent. The preliminary degradation in lignin and cellulose of CF occurred at 300 °C. The cellulose had completely decomposed at 400 °C, but in the case of MF, the lignin and cellulose were not completely decomposed at 400 °C. It was shown that there are different ways to improve the fire resistance of ULDF using boron, nitrogen-phosphorus, silica, and halogen-based fire-retardants. The fiberboard with silicium compounds had the lowest mass loss in three stages and total mass loss. Compared with CF, MF had a lower mass loss. Furthermore, the exothermic peak for MF at around 400.0 °C was decreased, indicating that the fire resistance of ULDF was improved by the complex fire-retardants.

Effects of different flame-retardant treatments on the sound absorption properties of low-density fiberboard

“…Phosphorus used in flame retardants generates phosphate during combustion, which mixes with soot to form a barrier that blocks access to oxygen (Pen et al 2012). In addition, melamine contained in the MUF resin used to manufacture the LDF condenses during heating to produce melam or melem, which are thermally stable materials that help in the formation of a barrier (Liu et al 2016). According to the results of this experiment, powder and liquid-type flame retardants could work effectively on LDFs when applied through surface spraying or by mixing with the adhesive.…”

Thermal and fire properties of medium-density fiberboard prepared with huntite/hydromagnesite and zinc borate

“…Various fire retardants containing compounds of halogen, boron, phosphorus, aluminum, magnesium are widely used for combustible materials to improve their fire retardant properties (Çavdar 2020). These fire retardants can be utilized alone, together, or combined with various additives (Liu et al 2016).…”