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We have developed a range of Mediprene thermoplastic elastomers (TPE) for plunger seals in single-use syringes. The TPE seal, which is mounted on the end of the plunger, needs to provide a leakproof seal with the syringe barrel. As ease of use for the medical practitioner and patient comfort are also key requirements, the seal helps to optimize plunger movement for accurate dosage control and ease of injection.

Originating from medical raw materials with high biocompatibility status and compounded under clean conditions, Mediprene TPEs are the material of choice for medical customers who want to maximize the probability that their devices will pass relevant medical tests.

All Mediprene TPE Syringe Plunger Series compounds fulfil a strict raw material selection policy. The raw materials are food contact compliant (FDA 21CFR and Commission Regulation (EU) No 10/2011) and have a proven level of biocompatibility:

  • The styrenic block copolymer has passed USP Class VI
  • The paraffinic oil is a medicinal white oil complying with the EP for liquid paraffin and USP 24 for mineral oils
  • The PP has passed the USP Class VI tests and meets the requirements in the EP Monograph 3.1.3 Polyolefins
  • The components of the black masterbatch have passed USP Class VI or corresponding parts of ISO 10993

For further information about our Mediprene TPE compounds please contact mediprene@hexpolTPE.com

Download Mediprene TPE for Plunger Seals Product Guide