| abstract |
This disclosure is directed to an article for dispensing volatile matter as a gas and/or vapor in a chemically unchanged state to the surrounding atmosphere. This is attained by confining either an aqueous emulsion comprising a volatile matter formed with the help of a surfactant and/or pad impregnated or over-saturated with volatile matter in an hermetically sealed, liquid impervious envelope or container formed of a water insoluble vinyl polymer, co-polymer or derivative thereof. The internal walls of the envelope being disposed contiguous the aqueous emulsion or impregnated pad are readily wetted or influenced thereby to result in a gradual yielding of the volatile matter therein through the liquid impervious walls of the envelope as a gas or vapor in a chemically unchanged, dry state to the surrounding atmosphere. To enhance the release of the volatile contained in the aqueous emulsion through the walls of the envelope, the envelope is externally impregnated with an aqueous emulsion of a volatile material formed with the help of a surfactant or emulsifier. |