Container with microporous membrane for dispensing vapor...

Details Container with microporous membrane for dispensing vapor... Container with microporous membrane for dispensing vapor...

B - Operations, Transporting

67

D

222/20

B67D 99/00 (2010.01) A61L 9/01 (2006.01) A61L 9/12 (2006.01)

Patent

CA 2002886

TITLE: A CONTAINER WITH MICROPOROUS MEMBRANE FOR DISPENSING VAPOR FROM VOLATILE LIQUID ABSTRACT OF THE DISCLOSURE Volatile substances such as fragrances, perfumes, deodorizers, room freshener compositions and the like are dispensed in vapor phase from a container holding the substance in liquid phase at room temperature under atmospheric pressure. The container has a window covered with a microporous membrane with an active structure formed from a material having a critical surface tension that is below the surface tension of the liquid substance. The active membrane material has a critical surface tension that is below 22 dynes/cm and preferably below 20 dynes/cm while the surface tension of the liquid is at least 22 dynes/cm. One example is an ultraviolet irradiated polymer composition with 0.2 microns nominal pore size.

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