| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation material constituted of fibers made of an inorganic material and to improve the heat insulation property thereof, and a core material constituting the heat insulation material and a refrigerator having the heat insulation material.SOLUTION: A heat insulation material 10 comprises a core material 11 constituted of fibers 13 made of an inorganic material. The fibers 13 are long fibers having at least one portion where the identical fibers 13 contact each other, and the average fiber diameter of the fibers 13 is as thin as 1 μm or less. An external capsule material 12 is the so-called laminate material, in which one layer or two or more layers of a resin film are vapor-deposited with a metal or a metal oxide and have an air-tightness eliminated in a gas permeability.SELECTED DRAWING: Figure 1 |
