| 摘要 |
An aerosol valve has a housing 3 with a lower inlet 8 and a tap orifice 4. A valve stem with an inlet 2 and outlet joined by a passageway is movable so that the inlet 2 can selectively communicate with the housing 3. An actuator 5 is mounted on the valve stem with a discharge aperture communicating with the valve stem outlet via a passageway. The vapour phase tap orifice 4 has a narrowest diameter of 0.58 to 0.64 mm; the housing inlet 8 has a narrowest diameter of 0.62 to 0.66 mm; the valve stem passageway inlet 2 has a narrowest diameter of 0.46 to 0.50 mm; and the actuator outlet 7 has a narrowest diameter of 0.49 to 0.53 mm. The aerosol mixture comprises 70 to 85% by weight of the propellant based on the total weight of said mixture. Certain subranges of these ranges are preferable. The propellant can be butane, propane and/or isobutene. The container may be 100ml. |
