Vacuum panel manufacturing process

摘要

A method for manufacturing a vacuum insulation panel is provided which includes the steps of: drying a quantity of microporous powder; evacuating the powder of gases; evacuating a gas impermeable bag of gases; loading the powder into the gas impermeable bag while the bag and powder remain in an evacuated condition; and sealing the gas evacuated bag with the gas evacuated powder therein to form a vacuum insulation panel. The powder in the bag should be compacted before the bag is sealed and also a trace amount of helium may be injected into the bag prior to sealing to assist in leak detection of the sealed panel. The panel with injected helium has an internal pressure not exceeding 1 mm Hg.