| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a vacuum heat insulation material, in which vacuum leak is reduced with reduced manufacturing man-hours. <P>SOLUTION: The method for manufacturing a vacuum heat insulation material includes: a core housing step for housing a core 2 as a spacer in a sac-like inner bag 10, through a first opening part 10b opened to the sac-like inner bag 10 of which the inner surface is formed of a first thermally-welded layer; an inner bag housing step for housing the inner bag 10 in a sac-like outer package material 20, through a second opening part 20b opened to the sac-like outer package material 20 of which the inner surface is formed of a second thermally welded layer 21; and a welding step welding the first opening part 10b and the second opening part 20b at the same time and sealing the inner bag 10 and the outer package material 20 at the same time, while pressure in the inner bag 10 and outer package material 20 is decreased. A welded part 10a of the first opening part 10b is disposed inside a welded part 20a of the second opening part 20b welded in the welding step. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
