Lubricant coating and medical injection device comprising such a coating
AssigneeBecton Dickinson France
InventorsCédric Foucher, Virginie Santucci-Aribert
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Abstract
The invention relates to a lubricant coating (5) for a medical injection device (1), comprising successively: —a bottom layer (50) in contact with the medical device surface (21) of the container to be lubricated, comprising a mixture of cross-linked and non-cross-linked poly-(dimethylsiloxane), —an intermediate layer (51) consisting essentially of oxidized poly-(dimethylsiloxane) and having a thickness comprised between 10 and 30 nm and, —a top layer (52) consisting essentially of non-cross-linked poly-(dimethylsiloxane) and having a thickness of at most 2 nm. The invention also relates to a medical injection device comprising such a lubricant coating, and a manufacturing process for said coating.
Claims6
A process for manufacturing a lubricant coating, comprising the following steps:
- depositing a layer of poly-(dimethylsiloxane) on a substrate, the thickness of said layer being comprised between 90 and 400 nm, and
- exposing said layer to an oxidizing plasma, so as to form said lubricant coating by oxidizing and cross-linking at least part of the poly-(dimethylsiloxane),
- wherein the lubricant coating comprises:
- a bottom layer in contact with the surface of the substrate comprising a mixture of cross-linked and non-cross-linked poly-(dimethylsiloxane),
- an oxidized poly-(dimethylsiloxane) intermediate layer above the bottom layer comprising a thickness between 10 and 30 nm, and
- a non-cross-linked poly-(dimethylsiloxane) top layer above the oxidized poly-(dimethylsiloxane) intermediate layer comprising a thickness of at most 2 nm.
Dependencies are inferred from the claim text.