| abstract |
In the present specification, a sealing film for a secondary battery lead tab, comprising: a core layer comprising a homopropylene resin and an organic filler; And a skin layer comprising a polypropylene-based resin in which dicarboxylic acid or an acid anhydride thereof is graft copolymerized, wherein the skin layer is formed on one or both sides of the core layer, for a secondary battery lead tab. A sealing film is provided. |