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. a delivery engine comprising:
i. a reservoir for containing a volatile material mixture;
ii. a rupturable substrate secured to said reservoir;
iii. a rupture element positioned adjacent to said rupturable substrate; and
iv. a microporous, ultra-high molecular weight polyethylene membrane enclosing said reservoir, said rupturable substrate, and said rupture element, wherein said membrane comprises an average pore size of about 0.01 microns to about 0.06 microns, and a thickness of about 0.01 mm to about 1 mm;
wherein, when said rupture element is actuated in a first direction towards said reservoir, said rupturable substrate is breached in said first direction and said volatile material mixture crosses through said rupturable substrate and crosses through said rupture element contacting said membrane for diffusion to the atmosphere; and
b. a housing comprising a base, a shell, and a hollowed core, said hollowed core comprises a notch for compressing said rupture element upon insertion of said delivery engine in said housing.
2. The apparatus of claim 1 , wherein said hollowed core comprises a front wall comprising vents, wherein said notch is positioned on the inner face of said front wall.
3. 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.
4. An apparatus for delivering a volatile material comprising:
a. a delivery engine comprising:
i. a liquid reservoir comprising a single opening and comprising a width to length ratio of about 4:1 and a depth of about 5 mm to about 15 mm, and a volatile material mixture, said mixture comprising about 90% 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;
ii. a rupturable substrate enclosing said single opening;
iii. a rupture element;
iv. a collection basin in fluid communication with said liquid reservoir upon rupturing said rupturable substrate;
v. a microporous, ultra-high molecular weight polyethylene membrane sealed to said liquid reservoir and enclosing said rupturable substrate, said rupture element, and said collection basin, wherein said breathable membrane comprises an evaporative surface area of about 15 cm 2 to about 35 cm 2 and comprises a silica filler, an average pore size of about 0.02 microns, and a thickness of about 0.01 mm to about 1 mm; and
b. a housing comprising a notch for compressing said rupture element upon insertion of said delivery engine into said housing.
5. The apparatus of claim 4 , wherein the insertion force of said delivery engine in said housing to breach said rupturable substrate is less than about 25N.