Vacuum insulated panel (VIP) http://www.pvd-metallizer.com VIP in English is the short form for vacuum insulated panel. It is one of the insulated materials, composed of the core filling materials with vacuum protection surface layer compound together. It effectively avoids air convection caused by heat transfer, therefore coefficient of thermal conductivity can be greatly reduced, less than 0.0025 w/m.k, and it does not contain any OD (Ozone Depleting Substances) material with the characteristics of environmental protection and energy saving. By present VIP is the world's most advanced material of the efficient heat preservation. Vacuum insulated panel (VIP) is the most advanced material in contemporary world for refrigeration, freezing, insulation and fireproofing, architectural building etc.