Minnesota Mining and Manufacturing Company (St. Paul MN 02)
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Aerosol spray heads which provide a fan spray pattern for cohesive polymer solutions at high aerosol solids levels. The orifice of the spray heads is elongate in shape and generally aligned with and centered in an elongate groove in the exit face of the spray tip.
An aerosol can for spraying a polymer in a fan-shaped pattern comprising: a can; a valve mounted on said can; a spray head including: (a) a generally cylindrical inlet stem having an inlet end portion slideably and sealably mounted in said can valve and an outlet end portion, a central passageway be
An aerosol can for spraying a polymer in a fan-shaped pattern comprising: a can; a valve mounted on said can; a spray head including: (a) a generally cylindrical inlet stem having an inlet end portion slideably and sealably mounted in said can valve and an outlet end portion, a central passageway between said inlet and outlet end portions, and at least one fluid metering passage through the side wall of said stem proximate said inlet end portion and communicating with said central passageway; and (b) a nozzle portion attached to said outlet end portion of said stem, said nozzle portion having an elongate groove which defines a terminal surface for said nozzle portion, said groove having a major axis, said nozzle portion further having an elongate chamber extending generally transverse to said stem with a central axis, an outlet end, and an inlet end communicating with said central passageway, and an orifice communicating with said outlet end of said elongate chamber and opening through said terminal surface, said orifice forming an elongate intersection with said terminal surface as viewed along said central axis, being generally centered in said groove, and having a major axis which is generally aligned with said major axis of said groove, wherein said major axis of said groove is longer than said major axis of said orifice; a solution contained within said can of a polymer having a minimum number average molecular weight of approximately 10,000 and a solvent, the percentage by weight of said polymer in said solution being a value at which said solution exhibits non-Newtonian viscoelastic properties; and a propellant contained within said can which generates a pressure within said can and is sprayed with said solution.