Dispensing device

1. A dispensing device for release of an air treatment material, comprising:

a semi-permeable substrate, the entire substrate having a mesh size between about 15 strands per cm to about 79 strands per cm, wherein the substrate holds an air treatment material;

a support component for supporting the semi-permeable substrate, wherein the semi-permeable substrate extends from a peripheral edge of the support component; and

a flange portion elongate about a single axis for supporting the semi-permeable substrate, wherein the semi-permeable substrate extends from a peripheral edge of the flange portion, and

wherein the dispensing device releases the air treatment material at a rate of at least about 0.05 mg/hr at about 25° C.

2. The dispensing device of claim 1 , wherein the semi-permeable substrate comprises nylon.

3. The dispensing device of claim 2 , wherein the semi-permeable substrate has a surface area defined by a perimeter of the semi-permeable substrate that measures between about 300 cm 2 to about 500 cm 2 .

4. The dispensing device of claim 1 , wherein the semi-permeable substrate comprises two wings attached at the support component.

5. The dispensing device of claim 1 , wherein the support component is defined by a grammage of between about 200 g/m 2 to about 400 g/m 2 .

6. The dispensing device of claim 1 , wherein the air treatment material is an insecticide.

7. The dispensing device of claim 6 , wherein the air treatment material comprises teflumethrin, transfluthrin, prallethrin, vaporthrin, metofluthrin, tefluthrin, esbiothrin or other synthetic pyrethroids.

8. The dispensing device of claim 1 , wherein the flange extends from a portion of the support component.

9. A dispensing device for release of an air treatment material, comprising:

a substrate; and

a vertical support component and at least one outwardly extending flange portion that supports the substrate, wherein the substrate extends from a peripheral edge of the at least one outwardly extending flange portion, and

wherein the substrate comprises two wing portions extending outwardly from the vertical support component, and

wherein the two wing portions form an angle of between about 90 degrees to about 180 degrees with respect to each other to promote air flow through the dispensing device.

10. The dispensing device of claim 9 , wherein the substrate comprises nylon.

11. The dispensing device of claim 9 , wherein the substrate holds the air treatment material thereon and also allows migration of the air treatment material to allow evaporation thereof in response to air flow.

12. The dispensing device of claim 9 , wherein each wing portion is angled with respect to a central axis defined by the support component.

13. The dispensing device of claim 12 , wherein each wing portion includes an upper edge that extends upwardly at an angle between about 10 degrees to about 50 degrees as measured with respect to the central axis and a first axis extending perpendicularly therefrom.

14. The dispensing device of claim 13 , wherein each wing portion includes a lower edge that extends upwardly at an angle between about 10 degrees to about 50 degrees as measured with respect to the central axis and a second axis extending perpendicularly therefrom.

15. The dispensing device of claim 14 , wherein the angle of the upper edge and the angle of the lower edge about the central, first, and second axes, respectively, are substantially the same.

16. The dispensing device of claim 9 further including a hanging assembly having a string and an attachment mechanism.

17. The dispensing device of claim 16 , wherein the string extends through the dispensing device and forms an angle of between about 70 degrees to about 90 degrees as measured from axes formed by the wings of the dispensing device and corresponding perpendicular axes extending therefrom.

18. The dispensing device of claim 9 further including a use-up cue.

19. The dispensing device of claim 9 , wherein the air treatment material is an insecticide.

20. The dispensing device of claim 19 , wherein the air treatment material comprises teflumethrin.

providing a substrate within a container, wherein the substrate includes two wing portions that are adjacent one another and having an elastic material attached thereto; and

opening the container and removing the substrate, whereby the elastic material acts to open the two wings of the substrate into an operable position and the wings are disposed at an angle of between about 90 degrees to about 180 degrees with respect to each other in the operable position.