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Vacuum Cup Material Chart

DescriptionAbbreviationCNPDPPSSi
Chemical designation / trade nameChloropreneNitrilePolyurethanePolyurethane
Silicone
Siton
ColorBlackBlackOrange / Green TransparentGreen/YellowRedBlue
Chemical resistanceGeneral weathering resistance++++++++++++++++
Ozone resistance++++++++++++++++
Oil resistance++++++++++-+++
Fuel resistance++++++-+
Alcohol resistance, ethanol 96%++++N/AN/A++N/A
Oxidation++++--+++-
EthanolN/AN/A++N/A+
General resistance to acids-+++-+
MethanolN/AN/A--N/A-
Hydrolysis++++++++
Mechanical characteristicsWear resistance++++++++++++++++
Resistance to permanent deformation++++--++-
Tensile strength++++++++-++
Shore hardness (°Shore A)50 ± 560 ± 555 ± 5 orange, 60 ± 5 green
30 ± 5 yellow, 60 ± 5 green50 ± 560 ± 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
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.

  • +++ Recommended
  • ++ Good, minor chemical attack
  • + Limited, moderate chemical attack, limited service
  • - Not recommended