| 摘要 |
PROBLEM TO BE SOLVED: To prevent strength of a resin laminate from being degraded even when a level difference is formed on a front side sheet of the resin laminate.SOLUTION: There is provided a resin laminate which has a front side sheet and a back side sheet superposed on each other with a hollow part interposed therebetween, and in which a large number of recessed ribs are formed by denting the back side sheet into the hollow space, the bottom parts of the large number of recessed ribs are welded to the front side sheet, and the front side sheet and the back side sheet are connected to each other by the large number of the recessed ribs. The front side sheet includes a first flat region, a second flat region protruding from the first flat region to a side opposite to the hollow space, and an inclined region constituted of an inclined plane connecting the first flat region and the second flat region to each other. Recessed ribs superposed on the inclined region of the front side sheet in a plan view among the large number of recessed ribs of the back side sheet are formed along the inclined plane of the inclined region.SELECTED DRAWING: Figure 1 |
