PACKAGING CONTAINER FOR HEATING BY MICROWAVE OVEN

摘要

PROBLEM TO BE SOLVED: To make a whole content in a packaging container to be heated efficiently without allowing microwaves to be concentrated at both corners of the container bottom by a method wherein the internal edges of the sealed parts at both corners of the container bottom are formed in curved shapes for the packaging container that is made up of a sheet into a sealed-up shape by heat sealing. SOLUTION: In a packaging container 1 for heating by microwave oven that is made up by superimposing a front sheet 2a and a backside sheet 2b together and by applying heat seal to their peripheries with a housing space 3 for housing curry roux with ingredients formed by the sealed parts 5, the internal edges 6 of the sealed parts 5 at both corners of the container bottom 7 are formed respectively in a curved shape in the radius of curvature of 5 mm or more. Thereby, the packaging container is not heated partially without allowing microwaves to be concentrated at both of the corners even though the packaging container 1 is put upright in the microwave oven and irradiated by microwaves, and furthermore contents are warmed up entirely and appropriately, being moved by convection without partial stagnation at both corners at the container bottom 7.