Vacuum heat insulating material, and refrigerator, jar pot and house equipped with the same

摘要

PROBLEM TO BE SOLVED: To provide a heat insulating material which is easy to handle and a vacuum heat insulating material which is easy for secondary processing.SOLUTION: A vacuum heat insulating material 6 comprises at least: a core material 9 comprising fiber assembly 7 and having two heat transfer surfaces facing each other; and an external covering material 10 for covering the core material 9. The core material 9 is sealed in a decompressed state in the external covering material 10. The vacuum heat insulating material 6 includes a yarn having a portion exposed to one of the heat transfer surfaces of the core material 9, a portion exposed to the other heat transfer surface, and a portion buried in the fiber assembly. The yarn 5 includes a large diameter part 11 having a cross sectional area which is larger than the yarn 5, and the fiber assembly 7 is compressed in a thickness direction by a tension of the yarn 5. Thereby, rigidity is imparted to the core material 9, and flatness of the vacuum heat insulating material is secured even after vacuum packaging or after an inspection of the internal vacuum degree of the vacuum heat insulating material.