CORE MATERIAL FOR A VACUUM INSULATION PANEL FORMED OF A PHENOLIC RESIN-CURED FOAM AND VACUUM INSULATION PANEL USING SAME, AND METHOD FOR MANUFACTURING SAME

摘要

The present invention relates to a core material for a vacuum insulation panel formed of a phenolic resin-cured foam and to a vacuum insulation panel using same, and to a method for manufacturing same. Particularly, the core material is formed of a phenolic resin-cured foam having a closed cell content of about 20% or less. Also, a cell thereof has a mean particle size of about 50 µm to about 500 µm, and a fine hole having a size of about 0.5 µm to about 30 µm is defined in the surface of the cell. Thus, the phenolic resin-cured foam may have a porosity of about 50% or more to provide superior insulation performance, ensure structural strength, and reduce manufacturing costs.