| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shelf board which is lightweight and has high strength. Ž<P>SOLUTION: The shelf board 10 includes: a core material 13 with a front surface and a rear surface with prescribed areas; and plate materials 14, 15 joined with the whole front and rear surfaces of the core material 13. The shelf board 10 is molded to be a rectangular shape with both side edges 16 extending in a longitudinal direction and both end edges 17 extending in a short side direction. An extrusion method polystyrene foam plate with a prescribed dimension of thickness is used as the core material 13. At least a coated plywood board or a normal plywood board having a prescribed dimension of thickness is used as the plate materials 14, 15 in the shelf board 10. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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