Water-soluble film

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/18 (2006.01) C08L 29/04 (2006.01) C11D 17/04 (2006.01) C08K 3/30 (2006.01) C08L 5/08 (2006.01)

Patent

CA 2669397

A film-forming composition made from a mixture of PVOH, chitosan, an alkali metal or ammonium bisulfite or metabi sulfite, and optional ingredients such as plasticizers, antioxidants, UV stabilizers, surfactants, crosslinking agents, lubricants, and extenders, is disclosed. Also disclosed are a method of making a film from the composition, a resulting film, and a packet made from the film and containing a cleaning composition such as a rinse additive. The composition can be formulated to yield an article such as a film which is soluble only below a predetermined pH threshold.

L'invention concerne une composition filmogène constituée d'un mélange de PVOH, de chitosan, d'un métal alcalin ou d'un bisulfite d'ammonium ou de métabisulfite, et d'ingrédients facultatifs tels que des plastifiants, des antioxydants, des absorbeurs UV, des agents tensioactifs, des agents de réticulation, des lubrifiants et des allongeurs. Un procédé de fabrication d'un film à partir de la composition, un film résultant, et un paquet fabriqué à partir du film et contenant une composition de nettoyage telle qu'un additif de rinçage sont également décrits. La composition peut être formulée pour produire un article tel qu'un film qui est soluble uniquement en dessous d'un seuil de pH prédéterminé.

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