Patent attributes
A method of making a container includes applying an insulating material in an inactive form to form a layer on a first substrate. The applied insulating material includes expandable microspheres. The method further includes joining a second substrate to the first substrate to adhere the first substrate to the second substrate and to create at least a portion of a multi-layer composite having at least one air gap between the first substrate and the second substrate. The method further includes heating the applied insulating material to activate expandable microspheres thereof to form expanded microspheres. The method further includes increasing the thickness of the applied insulating material layer to thereby increase the volume of the air gap between the first substrate and the second substrate of the multi-layer composite by the heating of the applied insulating material. The method further includes forming the multi-layer composite into a container having expanded microspheres.
