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Plastics & Elastomers
Product News

Long-term Sealing Performance with New Rubber-replacing Medical TPV from Teknor Apex

Published on 2017-07-26. Author : SpecialChem

Teknor Apex Company offers new rubber-replacing medical-grade thermoplastic vulcanizate (TPV) elastomers. These can be used for injection molded O-rings, gaskets, and diaphragms.

O-Rings and Gaskets
O-Rings and Gaskets

New medical-grade thermoplastic vulcanizate (TPV) elastomers:
  • Exhibit excellent long-term sealing performance.
  • Cost less to process than thermoset rubber.
  • Provide manufacturing advantages over standard TPVs and styrenic TPEs.

Medalist® MD-23100 Compounds

Teknor Apex’s Medalist® MD-23100 compounds provide:
  • Rubber-like elasticity
  • Superior long-term compression set
  • Chemical resistance

Typical Properties of Medical TPVs for O-Rings and Gaskets
Typical Properties of Medical TPVs for O-Rings and Gaskets


Over Standard TPVs

Unlike some standard TPVs, compounds in the new Medalist series are:
  • Non-hygroscopic, rendering pre-drying unnecessary.
  • Easy to color due to their lighter natural hue. 

Over Styrenic TPEs

Medalist MD-23100 Series compounds also exhibit better high-temperature stability than styrenic TPEs.

Suitability of Compounds

Medalist MD-23100 Series TPVs are available with Shore A hardness levels from a soft 15 to a semi-hard 73.
  • New TPVs have melt flow rates ranging as high as 24 g/10 minutes. They are suitable for molding small, high-precision parts in complex, multi-cavity tools. 
  • The compounds are suitable for over-molding onto polypropylene


Teknor Apex recommends the new compounds for sealing components used in devices for:
  • Drug delivery
  • Fluid transfer
  • Dialysis
  • Endoscopy
  • Other procedures
  • Equipment as feeding devices and pumps

Ross van Royen, senior market manager for regulated products, said:
“The dynamic sealing properties of Medalist MD-23100 Series TPVs enable device manufacturers to get excellent long-term performance while avoiding the higher cost and greater complications associated with processing thermoset rubber. At the same time, these new compounds provide processing advantages over many TPV and styrenic TPE candidates for seal applications.”


Teknor Apex produces Medalist MD-23100 Series compounds in ISO-13485 facilities. These facilities are in USA and Singapore. The new materials follow:
  • FDA requirements for food-grade ingredients
  • ISO 10993-5 standards for biocompatibility
  • REACH SVHC directives

They are free of DEHP and other phthalates, BPA, and latex. Standard grades are ADM-free.

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Source: Teknor Apex Company
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