| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ridged sheet or the like easy to bend longitudinally and sufficiently high in the durability or the like at bent parts. <P>SOLUTION: The ridged sheet 5 is such one that the obverse faces 2a and the reverse faces 2b of respective base materials 2 each of which is made by mutually superposing a plurality of sheet-like materials 1 of thermoplastic resin are provided with ridges 4 so as to be in mutual noncontact of the obverse surfaces 2a and the reverse surfaces 2b respectively, wherein the ridges 4 extending in the cross direction W of the sheet 5 are arranged at given pitches (p) in the longitudinal direction L of the sheet 5 on the obverse face 5a and the reverse face 5b of the sheet 5 respectively, so that the ridges 4 are shifted at a half pitch of p/2 each in the longitudinal direction L of the sheet 5. <P>COPYRIGHT: (C)2004,JPO |
