To prevent bag breakage of a bent and cut vacuum heat insulating material, to secure quality of a core material, and to inhibit time degradation of heat conductivity in the multi-core vacuum heat insulating material obtained by a manufacturing method for heat sealing circumferences of the plurality of core materials by heating and pressing the material including the core material between covering materials.
A heat sealing portion 14 of a bent and cut part of the vacuum heat insulating material 10 has a width wider than the other heat sealing portions 13, 17, thus effects of prevention of bag breakage of the vacuum heat insulating material 10, securement of quality of the core material 11, and prevention of time degradation of heat conductivity can be be achieved.
| JP2022040991 | HEAT INSULATING PANEL AND MANUFACTURING METHOD THEREOF |
| WO/2015/115460 | VACUUM HEAT-INSULATING MATERIAL |
| JP2004197935A | 2004-07-15 | |||
| JP2001141178A | 2001-05-25 | |||
| JPH0798090A | 1995-04-11 | |||
| JP2005028691A | 2005-02-03 |
Hiroki Naito
Daisuke Nagano
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