Thermal insulating material

摘要

A thermal insulating material that is superior to blown-in polyurethane foam that has vertical insulating properties and lateral thermal conducting properties, and is made of alternating layers of aluminum metal foil and insulating foam that causes the temperature of a cold spot to increase at least 3 degrees F. when compared to an equivalent amount of blown-in polyurethane foam. This material is suitable for increasing the temperature of cold spots of the exterior of refrigerator/freezer doors.

主权项

1. A refrigerator or freezer door comprising an exterior panel and an interior panel forming an insulating chamber wherein the exterior panel has an exterior recess which causes a narrowing of the chamber;
wherein the insulating chamber consists essentially of; a first thermal insulating material and a second thermal insulating material; wherein the first thermal insulating material consists essentially of alternating layers of aluminum foil and flexible insulating foam sheets; wherein the first insulating material is applied to the chamber directly behind the recess; wherein the alternating layers have a first outer layer and a second outer layer, wherein the outer layers are aluminum foil; wherein the first material is less than about ½ inch thick; wherein the first material has vertical thermal insulating properties, wherein the first material has lateral thermal conducting properties; wherein the first aluminum foil outer layer contacts the exterior panel and the second aluminum foil outer layer contacts the interior panel thereby extending the first insulating material across the full thickness of the recess; wherein the second thermal insulating material consists essentially of polyurethane foam; wherein the second thermal insulating material sandwiches the first thermal insulating material in a lateral direction and fills the rest of the insulating chamber; and wherein the second insulating material is not located behind the exterior panel recess.