Patent ID: 7638181
Filing Date: 2009-12-29
Classification: B32B,F25D,Y10T

Abstract:
1. A vacuum heat insulator comprising: a core formed of a laminated body where glass fibers are laminated in a thickness direction of the vacuum heat insulator, wherein the glass fibers contain an alkali content of at least 0.8% and at most 20% in weight, and the average diameter of the glass fibers is 3.5 μM; and an enveloping member covering the core and having gas barrier property, wherein the core is heat-pressed at a temperature of 480° C. for 5 minutes, such temperature being lower than the strain point of the glass fibers and insufficient to cross-link the glass fibers through necks formed between the glass fibers, and molded so that the laminated body has a density of 100 kg/m