Silicone O-rings adding to HIV protection


Belfast – Intra vaginal rings have been made for many years in various polymer materials such as EVA, LSR and polyurethane elastomers and thermoplastics, to slowly release active pharmaceutical ingredients.

This has been in the form of polymer “reservoir rings” (“core”) with a hollow core containing dissolved APIs, “sandwich” (“shell”) ring versions or solid “matrix” rings with one or more APIs incorporated within the polymer matrix.

LSR Orings600 O-rings have been made for many years in various…

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