LSR-O-ring

LSR O-rings adding to HIV protection

Belfast – Researchers at Queens University Belfast in Northern Ireland have observed that reservoir and sandwich rings involve complex production but release API at a low but constant rate.

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…

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