| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material vacuum-packed in a covering bag on which a heat insulating core material particularly composed of inorganic fiber is composed of a gas-barrier transparent laminated film, in the vacuum heat insulating material used for a refrigerator or an outer wall material of a house.SOLUTION: This vacuum heat insulating material is vacuum-packed in the covering bag on which the heat insulating core material is composed of the gas-barrier laminated film. The vacuum heat insulating material is characterized in that an indicator for detecting oxygen is set in a part in the covering bag in a recognizable state from the outside of the covering bag. |
