| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vacuum heat-insulating container having enhanced heat insulating performance. <P>SOLUTION: A mixed powder which is obtained by mixing two or more kinds of powders with each other to have a bulk density of 0.040-0.065 g/cm<SP>3</SP>is filled between an inside container 2 and an outside container 3 and between the inner wall and the outer wall of an opening part 6 to form a heat insulating material. Thereby, the heat insulation performance can be enhanced by reducing the void size between particles during the pressure reduction, and reducing the effect of its gas heat conductivity. Further, a projecting-shaped opening part 6 is formed of a material having the heat conductivity lower than that of a material of a container part, and the heat insulating material 7 is provided between the inner wall and the outer wall of the opening part 6, and the pressure is reduced therein. Thereby, the heat insulation performance can be enhanced by considerably reducing the heat leak caused by direct heat conduction from the inner container wall to the outer container wall. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
