| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a package material for a battery case capable of securing superior moldability even if not coated by a slipperiness-imparting component, and obtaining a sufficient volume/capacity ratio. <P>SOLUTION: This package material for the battery case is the package material for the battery case which includes a biaxially stretched polyamide film layer 2 as the outside layer, a thermoplastic resin unstretched film layer 3 as the inside layer, and an aluminum foil layer 4 arranged and installed between these both film layers. As the biaxially stretched polyamide film, the biaxially stretched polyamide film of which the density is 1,130 to 1,160 kg/m<SP>3</SP>is used. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
