Valve for aerosol container where valve chamber comprises a flourinated polymer

摘要

A valve for an aerosol container contains a suspension or solution comprising a medicament in a hydrofluroro alkane (HFA) propellant. The valve comprises a valve body defining a chamber, a transfer passage through which a quantity of the suspension or solution to be dispensed can pass from the container into the chamber and a dispensing means which enables the suspension or solution to be dispensed. The chamber comprises a fluorinated polymer formed by ambient temperature plasma polymerization. Described is an inhalation device in the form of a metered dose inhaler comprising an actuator and an aerosol container which comprises a canister and a dispensing valve. Also described is a method for applying a fluorinated plasma coating to a surface of a metering chamber of a metering valve.