Substrate for volatile delivery systems

摘要

A method and apparatus for delivering a volatile material from a dispensing device (20) is provided that uses a heat source to promote release of volatile materials from a wick (31) designed to deliver a volatile liquid (34) from a reservoir (28) to a heated location within a heater (25) wherein the volatile liquid can be heated and volatilized. The method comprises the steps of providing as a volatile material in the liquid in the reservoir an insect control active ingredient selected from the group consisting of natural pyrethrins, pyrethrum extract, synthetic pyrethroids, and mixtures thereof; providing as a wick (31) a substrate comprising granular particles adhered together to form a body having a network of pores and passages, the interior surfaces of which are non-reactive and non-absorptive with respect to the volatile material to be dispensed, the body being formed to occupy the heated location within the heater (25), wherein activation of the volatile dispensing device releases the volatile material from the pores, which volatile material is then dispensed; and, activating the heat source. The granular particles may be glass fused at contact points by means of a cross-linked polymer binder. The insect control active ingredient is typically selected from the group consisting of natural pyrethrins, pyrethrum extract, and mixtures thereof.