Heat Insulated Container

Abstract

A heat insulated container, in which the presence of this heat insulation performance can be confirmed from the outward appearance. In a heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing the internal container inside the external container with a gap provided therebetween, joining the internal container and the external container, and evacuating the gap to a vacuum and sealing it, an average particle diameter of particles on the surface of the radiation preventing film is made a predetermined value or more. According to the heat insulated container, since the average particle diameter of the particles on the surface of the radiation preventing film is a predetermined value or more, sufficient heat retaining performance can be obtained.

1 . A heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing said internal container inside said external container with a gap provided therebetween, joining an opening area of said internal container with an opening area of said external container, and evacuating said gap to a vacuum and sealing it,
 wherein said heat insulated container is formed such that an average particle diameter of particles on the surface of said radiation preventing film is a predetermined value or more, and heat insulation performance can be evaluated from said particle diameter.   
   
   
       2 . A heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing said internal container inside said external container with a gap provided therebetween, joining an opening area of said internal container with an opening area of said external container, and evacuating said gap to a vacuum and sealing it,
 wherein said heat insulated container is formed such that an average particle diameter of particles on the surface of said radiation preventing film on a part present in at least a side portion of said heat insulated container is a predetermined value or more, and heat insulation performance can be evaluated from said particle diameter.   
   
   
       3 . A heat insulated container according to  claim 1  wherein said predetermined value is 50 nm. 
   
   
       4 . A heat insulated container according to  claim 1 , wherein a film thickness of said radiation preventing film is 150 nm or more. 
   
   
       5 . A heat insulated container according to  claim 1 , wherein said radiation preventing film is an ITO film. 
   
   
       6 . A heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing said internal container inside said external container with a gap provided therebetween, joining an opening area of said internal container with an opening area of said external container, and evacuating said gap to a vacuum and sealing it,
 wherein an average particle diameter (x) of particles on the surface of said radiation preventing film, and a film thickness (y) thereof, have a relationship: y=4.4 x −43, where x is between 50 nm and 200 nm.   
   
   
       7 . A heat insulated container formed by coating a radiation preventing film on at least one surface of an external surface of an internal glass container and an internal surface of an external glass container, disposing said internal container inside said external container with a gap provided therebetween, joining an opening area of said internal container with an opening area of said external container, and evacuating said gap to a vacuum and sealing it,
 wherein an average particle diameter (x) of particles on the surface of said radiation preventing film on a part present in at least a side portion of said heat insulated container, and a film thickness (y) thereof, have a relationship: y=4.4 x−43, where x is between 50 nm and 200 nm.