| 摘要 |
PROBLEM TO BE SOLVED: To provide a housing container having printed layer easily visually recognized. SOLUTION: A battery pack 1a is provided with a casing 10 having an opening 11c; a battery core 20 stored in the casing 10; and a seal 30 covering the opening 11c and contacted with the casing 10. The seal 30 includes a peeling off layer 31 contacted with the casing 10; an opaque backing layer 34 formed on the peeling off layer 31 and an opaque printing layer 35 formed on the base layer 34. The base layer 34 includes a central part 34c and an outer periphery part 34p. The central part 34c and the outer periphery part 34p are separated by a window 30w formed on the base layer 34. |
