Patent ID: 9597854
Date: 2017-03-21
CPC Classifications: B32B

Claim:
1. A resin laminate, comprising: a front side sheet and a back side sheet, both stacked across a hollow, the back side sheet being recessed into the hollows to provide a large number of concave ribs and a bottom of the large number of concave ribs welded to the front side sheet to couple the front side sheet to the back side sheet by the large number of concave ribs, wherein the front side sheet is provided with a front side flat region configured with a flat surface and a front side convex region projecting to an opposite side of the hollow, the back side sheet is provided with a back side flat region configured with a flat surface and a back side concave region recessed into the hollow, the front side convex region and the back side concave region are provided in a position facing each other, at least one of the concave ribs is provided for each of the front side convex region and the front side flat region, a border between the back side concave region and the back side flat region and a border between the front side convex region and the front side flat region are different from each other in shape, and the border between the back side concave region and the back side flat region is provided to weave between the concave ribs.