| 摘要 |
The present invention regards a structural element made of corrugated cardboard characterised in that it comprises at least two layers (5) of corrugated paper each having a parallel corrugation ad a guide line (L, LI, L2) thereof, wherein the guide lines of the corrugations of the at least two layers (5) are inclined with respect to each other. The present invention also regards a structure made of corrugated cardboard comprising at least one box- shaped portion (30, 130, 230) comprising at least one structural element (15, 15', 215) of the previously indicated type. In addition, the present invention regards a corrugated cardboard sheet comprising at least one layer (5) of corrugated paper with corrugations parallel to a predetermined guide line (L), said cardboard sheet (1, 101) comprising at least one folding line (55), characterised in that said at least one folding line (55) is inclined with respect to said predetermined guide line (L) by an angle substantially different from 90°, preferably such angle is comprised between 30° and 60°, more preferably it is substantially equivalent to 45°. |
