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B. Samujło

Effects of the flame retardant and lubricant types on fire retardancy effectiveness

of medium density polyethylene

Polimery 2004, No 3, 191



DOI: dx.doi.org/10.14314/polimery.2004.191


Summary

The effects (expressed as oxygen index values - OI) of selected commercial halogen free flame retardants (magnesium hydroxide and two grades of aluminum hydroxide) and three lubricants on the ignition and combustion resistances of the extruded medium density polyethylene (PE-MD) were investigated. The relations between the type and concentration of flame retardant (50-60 wt. %) or lubricant and oxygen index (OI), heat of combustion (Csp) related to OI, and glow resistance (characterized with lz value) were characterized. It was found magnesium hydroxide FR-20 (C) shows the best fire retardancy effectiveness then in turn less efficient were aluminum hydroxides: Martinal OL-107c (B) and JHK-M10 (A). The results obtained let place the materials investigated into the group of non-flammable and self-extinguishing ones.


Keywords: halogen free flame retardants, lubricants, medium density polyethylene, combustion resistance, oxygen index, glow resistance


B. Samujło

Effects of the flame retardant and lubricant types on fire retardancy effectiveness of medium density polyethylene