| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed type battery case with excellent durability at high temperature and low moisture permeability. SOLUTION: With the sealed type battery case composed of a resin composite of 50 to 100 wt.% of crystalline polypropylene rein of deflection temperature under load (load of 1.81 MPa) of 70 deg.C and elongation after tension fracture (23 deg.C, 50 mm/min.) of 50% or more and 0 to 50 wt.% of polyphenylene ether group resin, welding strength (95 deg.C) of the above resin composite is 13 MPa or more and flexural strength with a notch (95 deg.C) is 250 N or more. |
