IMPROVEMENTS IN AND RELATING TO ARTICLES PROVIDING A VAPOUR PHASE ACTIVITY

摘要

An article which is capable of dispensing an active agent in the vapour phase, which article comprises a matrix having, at least in part, an active agent dispersed therethrough; wherein the rate of release of said agent from a surface of the matrix is dependent upon the rate of diffusion of the agent through the matrix and the rate of effusion of the agent from said surface.