Elastomers
Elastomers are dimensionally stable but elastically deformable synthetic materials whose glass transition point lies below their operating temperature. These synthetic materials deform elastically when subjected to tension and compression but afterwards return to their original, non-deformed shape. Sealing technology makes use of materials from the elastomer and thermoplastic groups.
Elastomers are generally distinguished according to polarity and saturation. The polarity permits rough assumptions to be made regarding swelling and resistance to chemicals, and saturation tells us about resistance to ozone and ageing.
- Non-polar, saturated elastomers from xpress seals: EPDM
- Polar, unsaturated elastomers from xpress seals: NBR
- Polar, weakly unsaturated: HNBR
- Polar, saturated: FPM, MVQ, TPU (polyester-based thermoplastic polyurethane elastomer)
Data sheets containing the most important features and properties of the elastomer materials available from xpress seals can be downloaded here:
