LAMINATED SEALANT FILM FOR SEALING TAB LEAD COMPOSED OF MODIFIED POLYOLEFIN-BASED RESIN FILM AND THERMOPLASTIC RESIN FILM

摘要

PROBLEM TO BE SOLVED: To provide a laminated sealant film sealing a tab lead, which is excellent in adhesiveness, insulation property, and electrolyte solution resistance, and in suppressing deterioration of adhesiveness to a metal due to the electrolyte solution.SOLUTION: There is provided a laminated sealant for sealing a tab lead, which is obtained by laminating a thermoplastic resin film having adhesiveness to a packaging material for a laminate type battery on a hot melt-type adhesive film layer. The hot melt-type adhesive film layer contains 30 to 60 pts.wt. of an aromatic modified terpene resin, which is a tackifier, as an essential component added to a base resin composed of 60 to 90 pts.wt. of (A) a modified ethylene-α-olefin copolymer modified with (a) an epoxy group-containing monomer and (b) an aromatic vinyl monomer and 40 to 10 pts.wt. of (B) a styrene conjugated diene-based block copolymer (provided that (A)+(B)=100 pts.wt).