Aramid conveyor belts

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SPECIALTIES

ARAMID CONVEYOR BELTS
Aramid (two trademarks are "Kevlar" and "Twaron") conveyor belts are used in special applications where a low weight is of paramount importance.
	St		D
Maximum breaking strength	++	10000 N/mm	o	4000 N/mm
Splice strength, static	++	app. 100 %	o	max. 75 %
Splice strength, dynamic	+	app. 60 %	-	app. 50 %
Longevity	++		-
Weight, for the same breaking strength	o	100	+	80
Pulley diameters	o		-
Impact resistance	+		-
Rip resistance	o		o
Corrosion resistance	+		++
Issues to be considered Aramide has a low fatigue resistance resp. high compression sensitiveness. Special requirements on the conveyor design have to be incorporated. The (dynamic) splice strength is much lower than for steel-cord conveyor belts. Aramid is less robust, quickly absorbs moisture, is susceptibility to UV radiation, has a very high transverse thermal expansion, rapid loss of strength due to swatter and humidity. Severe failures of Aramid conveyor belts in underground mining have led to their immediate ban some decades ago.

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