Biaxially-oriented electrical insulating film

Details Biaxially-oriented electrical insulating film Biaxially-oriented electrical insulating film

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) H01B 3/44 (2006.01) H01G 4/30 (2006.01)

Patent

CA 2662058

The invention relates to a biaxially oriented electrical insulating film which is constituted of a base layer and at least one cover layer, the base layer containing a mixture from a polypropylene P1 and a polypropylene P2 which is different therefrom, the polypropylene P1 being a linear polypropylene and having an Mw/Mn >5 and a mesopentadene isotactic index of at least 95% and the polypropylene P2 having a long-chain branching.

L'invention concerne une feuille électro-isolante à orientation biaxiale constituée d'une couche de base et d'au moins une couche de recouvrement. Selon l'invention, la couche de base comporte un mélange d'un polypropylène (P1) et d'un polypropylène différent (P2). Le polypropylène P1 est un polypropylène linéaire et présente un Mw/Mn > 5 ainsi qu'un indice isotactique de mésopentadiène d'au moins 95 %, tandis que le polypropylène P2 possède une ramification à chaîne longue.

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