| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material high in dimensional accuracy causing no crease to a film of a bag body surrounded by the peripheral edge of a cutout or a through hole of a core material, in reduced-pressure sealing and formed in a truncated cone shape or a cone shape or in a truncated pyramid shape or a pyramid shape regarding the vacuum heat insulating material, particularly the vacuum heat insulating material enclosing the core material having the cutout or the through hole, and its manufacturing method. <P>SOLUTION: The vacuum heat insulating material A10 is formed by enclosing the core material 3 in a bag body F formed of a gas barrier film having a heat welded layer, and heating without pressure the whole or unwelded part of the vacuum heat insulating material A9 with the inside sealed in a reduced-pressure state by ordinary pressure to heat-weld H the unwelded part M of the bag body F, front and rear faces of the core material 3 and the heat welded layer of the bag body F. The core material 3 with the cutout 3a or the through hole is enclosed in the bag body F, and a part surrounded by the peripheral edge of the cutout or the through hole of the core material 3 of the film is held by plate members 5, 6 from the outside and sealed by reduced pressure. The core material is not thereby deformed, and no crease is formed at a part surrounded by the peripheral edge. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
