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Techniques for Seal Designs Using TPVs

SpecialChem / Jan 17, 2008

The thermoplastic vulcanizates (TPVs) class of thermoplastic elastomers (TPEs) provide good compression recovery and seal force retention. The performance of these materials is quite equivalent to conventionally vulcanized rubbers. The EPDM rubber / polypropylene base TPVs are being widely adopted commercially to replace the conventional thermoset rubber materials, such as EPDM rubber (EPDM), poly-chloroprene rubber i.e. neoprene (CR) and chlorosulfonated poly-ethylene, trade name Hypalon (CSM). For more demanding applications where the temperature is much higher or there is exposure to hydrocarbon fluids may take advantage of the higher performance TPVs, such as the nitrile rubber / poly-propylene TPV (NBR/PP TPV), acrylate rubber TPV (AEM TPV), or silicone rubber TPV (TPSiV). Manufacturers of thermoplastic vulcanizate, TPVs, have done application testing and design analysis to support the introduction of these products in a wide variety of seal applications over a broad cross-section of industries.

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