US Patent 10099836 Thermal insulation dunnage and method

A method for making an insulating dunnage product (10) includes the steps of (a) permanently deforming at least one non-planar interior layer (12) that includes a paper sheet to form a plurality of air pockets (14), (b) surrounding the at least one interior layer (12) on all four sides and over the top and bottom sides of the at least one interior layer (12) with at least one outer layer (16) of sheet material and (c) peripherally sealing the at least one outer layer (16) to capture the at least one interior layer (12) therein such that the interior layer (12) has major portions that are free to shift relative to adjacent portions of the at least one outer layer (16).