Abstract: [Object] An object of the present invention is to provide an extremely practical and innovative food product heat treatment method capable of performing the same heat cooking and heat sterilization as that of the conventional technique while enhancing economy and productivity in comparison with the conventional technique. [Means of Achievement] The food product heat treatment method is characterized in comprising placing a food product (2) in a hermetically sealed vessel (1) in which a prescribed vapor pressure is maintained or can be maintained; injecting a heating liquid heated by a heating source (8) to 100° C.

Abstract: A process for producing a food enclosed in sealed containers which is free from a trouble during production that water spills from the containers or a perforating jig falls into the containers and in which a heat treatment can be conducted without causing quality unevenness. A food (1) is placed in containers (2). The containers (2) filled with the food (1) are sealed with a primary film (4) having a through-hole (3) to obtain a sealed-container-packed food (A). This sealed-container-packed food (A) is disposed in a heating vessel (7) having a steam inlet part (5) and a steam discharge part (6). Steam is introduced through the steam inlet part (5) into the heating vessel (7) to heat the sealed-container-packed food (A) while discharging the steam through the steam discharge part (6). Thereafter, a secondary film (8) is bonded to each container through the primary film (4) so as to cover the through-hole (3).

Abstract: [Object] An object of the present invention is to provide an extremely practical and innovative food product heat treatment method capable of performing the same heat cooking and heat sterilization as that of the conventional technique while enhancing economy and productivity in comparison with the conventional technique. [Means of Achievement] The food product heat treatment method is characterized in comprising placing a food product (2) in a hermetically sealed vessel (1) in which a prescribed vapor pressure is maintained or can be maintained; injecting a heating liquid heated by a heating source (8) to 100° C.