INSULATED UNITS AND METHODS FOR PRODUCING THEM

摘要

A method for producing an insulated unit includes sealing an interior space of the unit, the interior space containing a particulate material and a gas, the gas being at a first temperature that is higher than a second temperature and a first pressure, wherein the first pressure is not generated by mechanical evacuation of the interior space, for instance by pumping gas from the interior space to draw a vacuum on the interior space; and cooling or allowing the gas to cool to the second temperature, thereby reducing the first pressure and compacting the particulate material. Also disclosed is an insulated unit.