Polymeric film

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/18 (2006.01) B32B 27/32 (2006.01) B65C 3/26 (2006.01) C08L 23/10 (2006.01) G09F 3/02 (2006.01)

Patent

CA 2492510

There is described a biaxially oriented polyolefin single or multi-layer film which comprises at least one core layer comprising a propylenic polymer component and either an ethylenic polymer component (preferably 0.2% to 8% by weight of core layer) or a styrenic polymer component (preferably 0.2% to 25% by weight of core layer). The films have a dynamic loss modulus (E''), at 3 Hz and 25~C, of 28 to 136 MPa (TD) and/or 73 to 135 MPa (MD) as well as a dynamic storage modulus (E'), at 3 Hz and 25~C, of 630 to 2800 MPa (TD) and/or 1300 to 3000 MPa (MD). These films are suitable for use as a label facestock with improved conformability for example to provide improved labels for squeezable containers.

Cette invention a trait à un film polyoléfinique monocouche ou multicouche, orienté biaxialement, comprenant au moins une couche centrale renfermant un composant à base de polymère d'éthylène (de préférence, de 0,2 à 8 %, en pourcentage pondéral, de la couche centrale) ou un composant à base de polymère styrène (de préférence, de 0,2 à 25 %, en pourcentage pondéral, de la couche centrale). Ces films ont un module dynamique de perte (E''), à 3 Hz et 25 ·C de 28 à 136 MPa (MD) ainsi qu'un module de conservation (E'), à 3 Hz et 25 ·C de 630 à 136 MPa et/ou de 73 à 135 MPa (MD) ainsi qu'un module de conservation dynamique (E'), à 3 Hz et 25 ·C de 630 à 2800 MPa (TD) et/ou de 1300 à 3000 MPa (MD). Ces films se prêtent au mieux à la production de films pour étiquetage d'une conformité améliorée, s'agissant, notamment, d'étiquettes améliorées pour récipients pressables.

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