Packaged food and container for packaging food

Abstract

The present invention provides packaged food and a container for packaging food, in which a hole-sealing sheet which seals a vent hole formed at a portion of the container cannot so easily be peeled off but, when the food is heated by an microwave oven, the hole-sealing sheet automatically comes off at the time when the food contained in the container has reached the adequately cooked state. Specifically, the packaged food of the present invention is produced by enclosing food, which contains water or an aqueous solution by an amount suitable for heating by an microwave oven, in the container for packaging food, the container for packaging food having, on one side thereof, a surface portion made of plastic sheet, at least one vent hole being formed in the vicinity of the center of the surface portion, the vent hole being sealed by an adhesive hole-sealing sheet whose vertical peeling strength is no less than 1 N/cm in the temperature range of 40° C. or lower and is no higher than 0.1 N/cm at the temperature range of 80° C. or higher.

What is claimed is:  
     
         1 . A packaged food characterized in that food containing water or an aqueous solution is enclosed in a container, the container having a surface portion made of plastic sheet, at least one vent hole being formed in the surface portion, the vent hole being sealed by an adhesive hole-sealing sheet whose vertical peeling strength is no less than 1 N/cm in the temperature range of 40° C. or lower and is no higher than 0.1 N/cm at the temperature range of 80° C. or higher.  
     
     
         2 . A container for packaging food characterized in that the container has a surface portion made of plastic sheet, at least one vent hole being formed in the surface portion, the vent hole being sealed by an adhesive hole-sealing sheet whose vertical peeling strength is no less than 1 N/cm in the temperature range of 40° C. or lower and is no higher than 0.1 N/cm at the temperature range of 80° C. or higher.  
     
     
         3 . A container for packaging food of    claim 2   , at least one vent hole is formed in the vicinity of the center of a surface portion provided on one side of the container.  
     
     
         4 . A container for packaging food of    claim 2    or    3   , wherein the hole-sealing sheet seals the vent hole such that the adhesive layer having uneven width provided in the hole-sealing sheet covers the periphery of the vent hole.  
     
     
         5 . A container for packaging food of any of    claims 2    to    4   , wherein the hole-sealing sheet is made of white chemical paper used as a base material.