Pore structures for reduced pressure aerosolization

Details Pore structures for reduced pressure aerosolization Pore structures for reduced pressure aerosolization

A - Human Necessities

61

M

A61M 11/00 (2006.01) A61M 15/00 (2006.01) B05B 11/06 (2006.01) B65D 83/14 (2006.01)

Patent

CA 2382442

A nozzle (38) comprising a thin, flexible substantially planar polymeric film (46) having a plurality of pores (302) with structures allowing for generation of an aerosol at reduced extrusion pressure is disclosed. The pores can comprise at least two sections, or steps (h1, h2), in which the thickness of the membrane is reduced in stepwise fashion, or the pores can be tapered. Nozzles formed comprising pores having such structures permit aerosol generation at lower extrusion pressures, thereby allowing for decreased weight of aerosolization devices, increased efficiency, increased portability and increased battery life. The pore structures (302) also allow for the use of thicker, more easily processed polymeric films in manufacturing while having a thinner, more efficient aerosolization area. The use of decreased extrusion pressures also results in increased uniformity in aerosol generation and improved reliability of other components.

L'invention concerne un diffuseur (38) comprenant un mince film polymère (46) flexible sensiblement plan, pourvu de plusieurs pores (302) dont les structures permettent de générer un aérosol à pression d'extrusion réduite. Les pores peuvent comprendre au moins deux sections, ou étapes (h1, h2), dans lesquelles l'épaisseur de la membrane est réduite de façon progressive, ou les pores peuvent être rendus coniques. Les diffuseurs comprenant des pores dotés de telles structures permettent de générer un aérosol à des pressions d'extrusion inférieures, permettant ainsi d'obtenir des dispositifs d'aérosolisation plus légers, plus efficaces, plus faciles à transporter, et à plus longue durée de batterie. Les structures (302) des pores permettent également d'utiliser des films polymères plus épais, plus faciles à traiter en cours de fabrication, comprenant une zone d'aérosolisation plus mince et plus efficace. L'utilisation de pressions d'extrusion inférieures permet également de générer un aérosol plus uniforme et d'augmenter la fiabilité des autres composants.

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