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Abstract:
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The flammability of short Kevlar aramide fiber-thermoplastic
polyurethane (TPU) has been investigated with respect to fiber loading and
various flame retardant additives such as halogen containing polymers, antimony
oxide/chlorine donor combination, zinc borate, and aluminum hydroxide.
Smoke generation was reduced drastically, while the oxygen index was reduced
marginally in the presence of short fibers. The best improvement in the oxygen
index was obtained with antimony oxide/chlorinated paraffin wax combination,
in the weight ratio 1:6. A 70 phr loading of aluminum hydroxide improved LOI
and reduced smoke generation. |