Patent ID: 11921305
Assignee: THE BOEING COMPANY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A method for forming a layered material, comprising:
applying an adhesive to a front side of a rigid substrate in a pattern defining cell walls;
prior to full curing of the adhesive, laminating the front side of the rigid substrate to a rear side of a polymeric sheet via the cell walls, the polymeric sheet comprising reflective elements, the rear side comprising reflective elements formed integrally on the polymeric sheet or on a separate layer coupled to the rear side of the polymeric sheet;
wherein the rear side of the polymeric sheet comprising the reflective elements, the front side of the rigid substrate, and the cell walls, define an air gap; and
allowing the adhesive to fully cure after adhering the polymeric sheet to the rigid substrate;
wherein the adhesive is a two-part polyurethane adhesive that includes as a first part a polyol and isocyanate compound in a solvent, and as a second part, a crosslinker.