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What is Santoprene?

We recently switch the gaskets in our popular tank fittings from FKM and EPDM to just Santoprene. Hopefully this will help with your questions about Santoprene™.

So what is Santoprene?

It is a thermoplastic elastomer (TPE).
Thermoplastic elastomers are a diverse family of rubber-like materials that, unlike conventional thermoset rubber, can be processed and recycled within the manufacturing process like thermoplastic materials.

Santoprene™ (TPV) is a thermoplastic vulcanizate.

Santoprene is fully dynamically vulcanized ethylene propylene diene monomer (EPDM) rubber in a thermoplastic matrix of polypropylene (PP). It looks, feels and behaves like rubber but, due to the PP content, offers simple, flexible part design and manufacturing. It essentially is a high performance elastomer which exhibits the properties of rubber while providing the ease of processing of plastics. It has proven to be a dependable polymer for flexible engineered parts that require long-term performance. With the potential for reduced system costs, compared to materials such as thermoset rubber, and the potential for sustainability benefits, Santoprene TPV has become the global standard for engineered TPV.

Combining the characteristics of vulcanized rubber with the processing ease of thermoplastics, Santoprene TPV offers a sealing solution that is both durable and attractive for a variety of market segments, including: automotive, household appliances, electrical, construction and healthcare.

Santoprene ™ TPV (thermoplastic vulcanizates) is a manufactured by Exxon Mobil Corporation and they make several different grades of it. Depending on the ratio of EPDM rubber to PP, the physical properties such as hardness, modulus and flexibility will vary. You will normally just see it listed as Santoprene™.

What is the difference between Santoprene and EPDM?

Santoprene has the look, feel and behavior of EPDM rubber, but it can be processed on conventional thermoplastic processing equipment. This allows simplified, more flexible part design and easier manufacturing when compared to EPDM rubber. The main advantage of a TPV over EPDM rubber is lower weight for parts with a similar design. The weight reduction can be as high as 30%.
Title: What is Santoprene?
Description: Santoprene ™ TPV (Thermoplastic Vulcanizates)
Published: 3/12/2015
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