| 摘要 |
PROBLEM TO BE SOLVED: To provide a light weight case which has a low material cost and can be easily manufactured. SOLUTION: A case made of metal such as aluminum, duralumin, or stainless steel shows a high material cost and its manufacturing works are troublesome due to cutting, bending, or welding of a plate material. Owing to this fact, there is provided a case made of polyurethane-polyurea resin as its major raw material showing superior fast drying characteristic, fire-resistance, water-resistance, durability, environmental resistance, or the like. COPYRIGHT: (C)2009,JPO&INPIT
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