Flushable multilayer film

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/00 (2006.01)

Patent

CA 2747091

The present invention relates to a multilayer film, comprising an at least flushable, thermoplastic layer composite made of at least one layer that can be milled by the influence of water and is resistant to cold water or can only be dissolved slowly therein, on the basis of at least one at least partially saponified polyvinyl acetate having a layer thickness of < 10 µm and at least one layer soluble in cold water and based on at least one at least partially saponified polyvinyl acetate and at least one substance that increases the water solubility, selected from the group consisting of biodegradable polymers, surfactants, inorganic pigments and fillers, and to flushable packages produced from said multilayer film.

L'invention concerne une feuille multicouche comprenant un composite de couche thermoplastique, au moins lavable, comprenant au moins une couche pouvant être au moins fragmentée sous l'action de l'eau, résistant à l'eau froide, ou susceptible de se solubiliser partiellement dans l'eau, ladite couche étant à base d'au moins un acétate de polyvinyle, au moins partiellement saponifié, d'une épaisseur de couche < 10 µm, et au moins une couche soluble dans l'eau froide, à base d'au moins un acétate de polyvinyle, au moins partiellement saponifié, et au moins une substance renforçant la solubilité dans l'eau, choisie dans le groupe comprenant des polymères biodégradables, des tensio-actifs, des pigments inorganiques et des matières de charge. L'invention concerne en outre des emballages lavables, fabriqués en la feuille multicouche précitée.

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