Blends comprising a polar derivative of an ethylene based polymer and a cycloolefin polymer are prepared. The ethylene based polymer preferably comprises at least 60 weight % of ethylene, relative to the weight of the polymer and polar monomers selected from the group of carboxylic acids, alkyl acrylates and vinyl acetates. It is preferably 0.01 to 99.5% neutralized with metal ions selected from sodium, potassium, zinc, calcium, magnesium, lithium, aluminum, nickel, and chromium. The cycloolefin polymer is preferably an ethylene-norbornene copolymer. The invention also relates to the applications of such blends as sealant layers and film packagings. The perforation resistance, the heat seal initiation temperature and the hot tack strength of such films are improved.

_ mistur comprising um polar derivative um etileno based polímero e um cycloolefin polímero est prepared. _ etileno based polímero preferível compreend ao menos 60 peso % etileno, relativo peso polímero e polar monomers selecion grupo carboxylic ácido, alkyl acrylates e vinil acetato. _ est preferível 0.01 99.5% neutraliz com metal íon selecion sodium, potassium, zinco, cálcio, magnésio, lítio, alumínio, niquel, e cromo. _ cycloolefin polímero est preferível um etileno-norbornene copolymer. _ invenção também relacion aplicação tal mistur como vedador camada e película packagings. _ perfuração resistência, calor selo iniciação temperatura e quente aderência força tal película est improved. _