Air freshener unit

摘要

New dynamic air freshener unit comprises a porous synthetic polymer support impregnated with a fragrance. The synthetic polymer support is one produced by: (a) bonding together small particles of solid polymer; (b) coagulating polymer solutions in a non-solvent for the polymer; or (c) expanding a thermoplastic or thermosetting plastic by means of a blowing agent; to form a porous body. The unit is especially useful in vacuum cleaners.