Substrate for the controlled release of volatile substances

Details Substrate for the controlled release of volatile substances Substrate for the controlled release of volatile substances

A - Human Necessities

61

L

A61L 9/04 (2006.01) A01M 1/20 (2006.01) A61L 9/12 (2006.01)

Patent

CA 2250227

The description relates to a substrate for the controlled release of volatile substances which can be applied to the substrate in metered quantities, in which the substrate is flat, at least one of its surfaces has one or more recesses (2) to accept and store the volatile substances, where the ratio of area to volume of the substrate is at least 1 x 102 m-1, and the substrate consists of a material which is chemically inert to the volatile substances and/or their solvents. The substrate may take the form of at least one base (1) with the largest possible area. The recesses (2) may take the form at least partly of apertures (2) where the ratio of the surface to the volume of the substrate may be at most 500 x 102 m-1 and the substrate may take the form of a gauze, a fabric, a grid, a net or a sieve. Alternatively, the recesses or apertures (2) may be in the form of grooves of any width.

L'invention concerne un support permettant une libération régulée des substances volatiles pouvant être appliquées de manière dosée sur ledit support qui est en nappe. Au moins une des surfaces du support comporte une ou plusieurs cavités (2) servant à recevoir et à stocker les substances volatiles, de manière que le rapport de la surface au volume du support soit d'au moins 1.10?2¿ m?-1¿. Le support consiste en un matériau chimiquement inerte vis-à-vis des substances volatiles et/ou de leurs solvants. Le support peut se présenter sous forme d'au moins une plaque support (1) de surface aussi importante que possible. Les cavités (2) peuvent se présenter au moins en partie sous forme de passages (2), le rapport de la surface au volume du support pouvant être au plus de 500.10?2¿ m?-1¿. Le support peut se présenter sous forme de gaze, de tissu, de grille, de filet ou de tamis. Selon une autre variante de l'invention, les cavités ou passages (2) peuvent également se présenter sous forme de rainures de n'importe quelle largeur.

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