| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To keep a gas barrier property of jacketing materials and to keep heat insulating performance of a vacuum heat insulating material for a long time even when the vacuum heat insulating material is used under high humidity atmosphere. <P>SOLUTION: Two sheets of jacketing materials 13 covering a core material 14 are laminate films respectively composed of a thermal welding layer 16, a polyacrylic acid resin layer 20, a first evaporation layer 21, a base film 22 provided with the first evaporation layer 21, a second evaporation layer 23, a base film 24 provided with the second evaporation layer 23 and nylon 19 successively stacked from an inner side. As the polyacrylic acid resin layer 20 is formed on the first evaporation layer 21 in adjacent thereto, the influence of vapor on the polyacrylic acid resin 20 is reduced, the gas barrier property of the jacketing material 13 can be kept, and gas intrusion from end faces of the jacketing materials 13 can be inhibited, thus the heat insulating performance of the vacuum heat insulating material 12 can be kept for a long time. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
