Microwavable pouch

Abstract

Provided is a microwavable pouch including an automatic steam venting mechanism, which includes a steam venting sealing portion, a slit, and a flap piece. The steam venting sealing portion includes a seal peeling start portion. The slit includes a pair of slit end portions and a slit intermediate portion formed toward a region closer to the seal peeling start portion than the pair of slit end portions, and the automatic steam venting mechanism further includes an unsealed portion formed to cover the entire periphery of the slit and a control sealing portion formed by heat-welding a part of the flap piece to a second film.

1 . A microwavable pouch comprising an automatic steam venting mechanism, the automatic steam venting mechanism comprising
 a steam venting sealing portion that is formed by heat-welding a first film and a second film that overlap each other and isolates a steam releasing portion inside the steam venting sealing portion from a content containing portion,   a slit that is formed in the first film in the steam releasing portion, and   a flap piece that is formed in the first film and is defined by the slit,   
       the steam venting sealing portion comprising a seal peeling start portion that starts peeling by steam generated in the content containing portion during heating,
 the slit comprising
 a pair of slit end portions and 
 a slit intermediate portion that is formed toward a region closer to the seal peeling start portion than the pair of slit end portions and connects both of the pair of slit end portions, and 
 
 the automatic steam venting mechanism further comprising
 an unsealed portion formed to cover an entire periphery of the slit and in which the first film and the second film are not welded, and 
 a control sealing portion in which a part of the flap piece formed on the first film is heat-welded to the second film. 
 
 
     
     
         2 . The microwavable pouch according to  claim 1 , wherein the microwavable pouch is formed into a bag shape by heat-welding the first film and the second film to form a bag-making sealing portion,
 the steam venting sealing portion is formed continuously with the bag-making sealing portion, and   the control sealing portion is formed to protrude from the bag-making sealing portion toward an inside of the microwavable pouch.   
     
     
         3 . The microwavable pouch according to  claim 1 , wherein the second film is formed with a second slit formed in the same shape and the same position as the slit formed in the first film to overlap the slit formed in the first film in a front-back direction in the steam releasing portion.