Sealable and peelable film structure

   
   

A sealable and peelable film, including at least (a) a core layer containing a peelable blend (b) a pair of outer layers, at least one of which is a sealable outer layer, each independently containing a thermoplastic polymer. The peelable blend of the core layer (a) may contain (i) from 20-80 wt % of a polyethylene and (ii) from 80-20 wt % of a polyolefin incompatible with polyethylene (i), or it may contain (i) from 10-35 wt % of ethylene-.alpha.-olefin elastomer and (ii) from 90-65 wt % of propylene homopolymer. The film may also include an intermediate layer containing a propylene homopolymer, wherein the intermediate layer is positioned between the core layer containing the peelable blend and the sealable outer layer.

Uma película sealable e peelable, incluindo ao menos (a) um a camada do núcleo que contem uma mistura peelable (b) um par das camadas exteriores, ao menos um de que é uma camada exterior sealable, cada um que contem independentemente um polímero thermoplastic. A mistura peelable da camada do núcleo (a) pode conter (i) 20-80 do peso % de um polietileno e (ii) 80-20 do peso % de um polyolefin incompatível com polietileno (i), ou pode conter (i) 10-35 do peso % do elastomer de ethylene-.alpha.-olefin e (ii) 90-65 do peso % do homopolymer do propylene. A película pode também incluir uma camada intermediária que contem um homopolymer do propylene, wherein a camada intermediária é posicionada entre a camada do núcleo que contem a mistura peelable e a camada exterior sealable.

 
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