Biaxially oriented polyolefin slip films with improved...

B - Operations – Transporting – 32 – B

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B32B 27/18 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2452026

A biaxially oriented multilayer film usable to form adhesive labels to be attached to containers, such as bottles and cans. The film includes a core layer comprising polypropylene and a migratory slip agent and an outer slip layer on one side of the core layer. The slip layer includes primarily polypropylene, by weight, and a minor percent, by weight, of an additive, with the additive and the migratory slip agent being present in amounts to provide a COF on the surface of the slip layer of no greater than 0.45 and to provide an adhesion of the adhesive employed on the formed label for the slip layer of at least 50%.

L'invention concerne un film multicouche à orientation biaxiale pouvant être utilisé pour former des étiquettes adhésives destinées à être fixées sur des contenants tels que des bouteilles ou des boîtes. Ce film comprend une couche centrale contenant du polypropylène et un agent glissant migratoire, ainsi qu'une couche glissante extérieure située d'un côté de la couche centrale. Cette couche glissante comprend principalement (en poids) du polypropylène et un faible pourcentage (en poids) d'un additif. L'additif et l'agent glissant migratoire sont présents selon des quantités conférant à la surface de la couche glissante un coefficient de friction inférieur ou égal à 0,45, et à l'adhésif utilisé sur l'étiquette pour former la couche glissante une adhérence au moins égale à 50 %.

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