Apparatus for delivering a volatile material
An apparatus for delivering a volatile material in a continuous manner is disclosed. The apparatus includes a delivery engine having a reservoir for containing a volatile material; a rupturable substrate secured to the reservoir; a rupture element positioned adjacent to the rupturable substrate; and a breathable membrane enclosing the reservoir, rupturable substrate and rupture element. In some embodiments, the apparatus includes a housing having a notch for compressing the rupture element and breaching the rupturable substrate as it is inserted into the housing.
1. An apparatus for delivering a volatile material comprising a delivery engine comprising:
a. a reservoir comprising a volatile material mixture, said mixture comprising about 40% to about 100%, by total weight of said mixture, of volatile materials each having a VP at 25° C. of less than about 0.3 torr;
b. a rupturable substrate secured to said reservoir;
c. a rupture element integrally formed with said reservoir, extending opposite a z-direction, and positioned adjacent to said rupturable substrate;
d. a microporous membrane enclosing said reservoir, said rupturable substrate and said rupture element, wherein said microporous membrane comprises an average pore size of about 0.01 microns to about 0.06 microns and an evaporative surface area of about 2 cm 2 to about 35 cm 2 ;
and wherein said apparatus further comprises a housing comprising a notch extending towards said z-direction for compressing said rupture element upon insertion of said delivery engine into said housing, wherein said delivery engine provides 30 to 90 days of continuous emission of said volatile material without leakage.
2. The apparatus of claim 1 , wherein said delivery engine further comprises a collection basin in fluid communication with said microporous membrane and said reservoir upon rupturing said rupturable substrate.
3. The apparatus of claim 1 , wherein said rupture element is positioned between said rupturable substrate and said microporous membrane.
4. The apparatus of claim 1 , wherein said rupture element is positioned subjacent said microporous membrane.
5. The apparatus of claim 1 , wherein said rupture element comprises a compressible flange.
6. The apparatus of claim 5 , wherein said compressible flange comprises a distal end and a piercing element, said piercing element positioned on said distal end.
7. The apparatus of claim 1 , wherein the compression force of said rupture element to breach said rupturable substrate is less than about 15N.
8. The apparatus of claim 1 , wherein said microporous membrane comprises an average pore size of about 0.01 to about 0.03 microns.
9. The apparatus of claim 1 , wherein said microporous membrane comprises an average pore size of about 0.02 microns.
10. The apparatus of claim 1 , wherein said a housing further comprises a base, a shell, and a hollowed core.
11. The apparatus of claim 10 , wherein said notch is positioned in said hollowed core.
12. The apparatus of claim 11 wherein said hollowed core comprises a front wall comprising vents, wherein said notch is positioned on the inner face of said front wall.
13. The apparatus of claim 1 wherein said hollowed core comprises a first rib and a second rib for guiding said delivery engine against said notch.
14. The apparatus of claim 10 , wherein said housing comprises intensity control means.