Pressure generation system for a container

B - Operations – Transporting – 67 – D

Patent

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Details

B67D 7/72 (2010.01) B01J 7/02 (2006.01) B65D 83/14 (2006.01) B67D 1/04 (2006.01)

Patent

CA 2048612

The invention relates to the field of self-inflating pouches for use as discharge assistants in dispensers. In the prior art self-inflating pouches, which typically consist of adjacent compartments containing a first reactant in an aqueous solution and a second reactant in either an aqueous solution or solid form, difficulties were encountered in maintaining uniform gas generation in the pouch which resulted in erratic or inconsistent flow from the dispenser. The invention improves the uniformity of gas generation by providing the second reactant uniformly precipitated in a water-dispersible suspension medium. The expandable pouch (2) consists of a plurality of compartments containing a first reactant in an aqueous solution (30), such as a citric acid solution, and a water-dispersible gum suspension (34) containing a precipitated second reactant, such as sodium bicarbonate. The water-dispersible suspension medium (34) may also include a nucleating agent and surfactant.

L'invention porte sur des poches auto-gonflantes, utiles comme auxiliaires de sortie dans des distributeurs. Avec les poches auto-gonflantes existantes, généralement constituées de compartiments voisins renfermant un premier réactif dans une solution aqueuse et un second réactif, soit en solution aqueuse, soit sous forme solide, on s'est heurté à certaines difficultés pour maintenir une production uniforme de gaz dans la poche, ce qui causait un débit irrégulier ou anormal par le distributeur. L'invention améliore l'uniformité de la production de gaz en fournissant un second réactif à l'état de précipité uniforme dans un milieu de suspension hydrodispersable. La poche expansible (2) est constituée de plusieurs compartiments renfermant un premier réactif dans une solution aqueuse (30), comme une solution d'acide citrique, et une suspension de gomme hydrodispersable (34) renfermant un second réactif à l'état de précipité, par exemple du bicarbonate de sodium. Le milieu de suspension hydrodispersable (34) peut aussi renfermer un agent de nucléation et un surfactif.

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