Vertical pouch

Abstract

A vertical pouch includes a heating element to react with a reaction liquid and cause an exothermic reaction. A first pack is configured to form a space for containing the heating element between a first sheet and a second sheet. A second pack is configured to form a space for containing the heating element between a third sheet and a fourth sheet. A content container is comprised of the second sheet of the first pack, the third sheet of the second pack, and a bottom connecting lower portions of the second and third sheets and folded upward and downward. A reaction liquid passage is configured to make the first pack communicate with the second pack.

1 . A vertical pouch comprising:
 a heating element to react with a reaction liquid and cause an exothermic reaction;   a first pack configured to form a space for containing the heating element between a first sheet and a second sheet;   a second pack configured to form a space for containing the heating element between a third sheet and a fourth sheet;   a content container comprising the second sheet of the first pack, the third sheet of the second pack, and a bottom connecting lower portions of the second and third sheets and folded upward and downward; and   a reaction liquid passage configured to make the first pack communicate with the second pack.   
     
     
         2 . The vertical pouch according to  claim 1 , wherein the reaction liquid passage is formed by penetrating an adhered portion where the second sheet and the third sheet are adhered. 
     
     
         3 . The vertical pouch according to  claim 1 , wherein the reaction liquid passage is formed by bending and adhering edge portions of the second and third sheets from edges of the first and fourth sheets. 
     
     
         4 . The vertical pouch according to any one of  claims 1  and  2 , wherein the reaction liquid passage is formed higher than a fold when the bottom is folded upward. 
     
     
         5 . The vertical pouch according to  claim 1 , wherein the first sheet, the second sheet, the third sheet and the fourth sheet comprise a plurality of sheet members. 
     
     
         6 . The vertical pouch according to  claim 5 , further comprising an air-gap between the sheet members. 
     
     
         7 . The vertical pouch according to  claim 5 , wherein at least one of the sheet members comprises an insulating sheet member. 
     
     
         8 . The vertical pouch according to  claim 1 , wherein at least one of the first sheet and the fourth sheet further comprises a reaction liquid inlet through which a reaction liquid can be injected. 
     
     
         9 . The vertical pouch according to  claim 1 , wherein the first pack and the second pack further comprise a reaction liquid pack to accommodate a reaction liquid.