Vacuum heat insulating material and refrigerator

Abstract

A highly reliable vacuum heat insulating material having excellent workability, usability, and heat insulating performance, and a heat insulation box using the vacuum heat insulating material are provided. A vacuum heat insulating material includes: a first fiber assembly made by aligning a plurality of sheet-shaped fiber assemblies, which are continuous in a length direction, so as to be next to each other in a width direction; a second fiber assembly provided so as to overlap the first fiber assembly and made by aligning a plurality of sheet-shaped fiber assemblies, which are continuous in the length direction, so as to be next to each other in the width direction; and a core material formed in a flat plate shape by winding up the first fiber assembly and the second fiber assembly continuously from inside toward outside while being displaced by a predetermined amount Xb in the width direction.

Dependencies are inferred from the claim text.