Vacuum Cup Material Chart

Description	Abbreviation	C	N	P	DPP	S	Si
	Chemical designation / trade name	Chloroprene	Nitrile	Polyurethane	Polyurethane	Silicone	Siton
	Color	Black	Black	Orange / Green Transparent	Green/Yellow	Red	Blue
Chemical resistance	General weathering resistance	++	++	+++	+++	+++	+++
	Ozone resistance	++	++	+++	+++	+++	+++
	Oil resistance	+	+++	+++	+++	-	+++
	Fuel resistance	+	+++	+	+	-	+
	Alcohol resistance, ethanol 96%	++	++	N/A	N/A	++	N/A
	Oxidation	++	++	-	-	+++	-
	Ethanol	N/A	N/A	+	+	N/A	+
	General resistance to acids	-	+	+	+	-	+
	Methanol	N/A	N/A	-	-	N/A	-
	Hydrolysis	++	++	+	+	+	+
Mechanical characteristics	Wear resistance	+++	++	+++	+++	++	+++
	Resistance to permanent deformation	++	++	-	-	++	-
	Tensile strength	++	++	++	++	-	++
	Shore hardness (°Shore A)	50 ± 5	60 ± 5	55 ± 5 orange, 60 ± 5 green	30 ± 5 yellow, 60 ± 5 green	50 ± 5	60 ± 5
Temperature resistance*	Short-term in °C (<30 sec.)	-40 to +110°	-30 to 120°	-30 to +100°	N/A	-50 to +220°	N/A
Temperature resistance*	Long-term in °C	-20 to + 70°	0 to 80°	10 to 50°	10 to 50°	-40 to +200°	0 to 160°

* Approximate value: depends on ambient temperature, recovery time, wall thickness of vacuum cup, and application force.