Heat reservoir impregnated with latent heat storage material with excellent thermostability

Abstract

This invention provides a heat reservoir exhibiting improved thermostability at abnormally high temperatures. The heat reservoir 1 of the invention comprises: a plate-shaped porous substrate 10 having 2 main surfaces 11 and 12; a heat storage material composition impregnating into the porous substrate 10; and a coat layer 20 covering at least one of the 2 main surfaces 11 and 12 of the porous substrate 10, wherein the heat storage material composition comprises a latent heat storage material and a thermoplastic elastomer and the coat layer 20 is thermostable and radiant heat reflective.

1 . A heat reservoir, comprising:
 a plate-shaped porous substrate having two main surfaces;   a heat storage material composition impregnating into the porous substrate; and   a coat layer covering at least one of the two main surfaces of the porous substrate,   wherein the heat storage material composition comprises a latent heat storage material and a thermoplastic elastomer and the coat layer is thermostable and radiant heat reflective.   
     
     
         2 . The heat reservoir according to  claim 1 , wherein the thermoplastic elastomer is at least either an olefin-based thermoplastic elastomer or a styrene-based thermoplastic elastomer. 
     
     
         3 . The heat reservoir according to  claim 1 , wherein both the two main surfaces of the porous substrate are covered by the coat layers and the coat layers are gas-impermeable. 
     
     
         4 . The heat reservoir according to  claim 3 , wherein a surface that connects the two main surfaces of the porous substrate is covered by the coat layer. 
     
     
         5 . The heat reservoir according to  claim 1 , wherein the coat layer is a metal layer. 
     
     
         6 . The heat reservoir according to  claim 2 , wherein both the two main surfaces of the porous substrate are covered by the coat layers and the coat layers are gas-impermeable. 
     
     
         7 . The heat reservoir according to  claim 1 , wherein a surface that connects the two main surfaces of the porous substrate is covered by the coat layer. 
     
     
         8 . The heat reservoir according to  claim 2 , wherein a surface that connects the two main surfaces of the porous substrate is covered by the coat layer. 
     
     
         9 . The heat reservoir according to  claim 6 , wherein a surface that connects the two main surfaces of the porous substrate is covered by the coat layer. 
     
     
         10 . The heat reservoir according to  claim 2 , wherein the coat layer is a metal layer. 
     
     
         11 . The heat reservoir according to  claim 3 , wherein the coat layer is a metal layer. 
     
     
         12 . The heat reservoir according to  claim 4 , wherein the coat layer is a metal layer. 
     
     
         13 . The heat reservoir according to  claim 6 , wherein the coat layer is a metal layer. 
     
     
         14 . The heat reservoir according to  claim 7 , wherein the coat layer is a metal layer. 
     
     
         15 . The heat reservoir according to  claim 8 , wherein the coat layer is a metal layer. 
     
     
         16 . The heat reservoir according to  claim 9 , wherein the coat layer is a metal layer.