| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum heat insulator for a heat insulating box that can be used with a long-fiber organic fiber assembly as a core material, correspond to the size required for the vacuum heat insulator without generating scraps, and has excellent handling properties, insulation efficiency, and productivity.SOLUTION: A vacuum heat insulator for a heat insulating box has a core material enclosed in a container having a gas barrier property and brought into a decompression state. The core material is a laminated structure formed by a sheet-like fiber assembly being continuously wound from the inner periphery toward the outer periphery. |
