| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging bag for use in a microwave oven which is capable of packaging contents while the bag is not peeled by the pressure or the impact applied thereto during transport or storage, preventing bursting of the packaging bag even when the bag is heated in the microwave oven when the packaging bag is in a self-standing state, automatically dropping the internal pressure therein, sealably packaging liquid contents, preventing the contents from being spilled out with self-standing stability, rapidly discharging steam therefrom, safely performing heating and cooking, and easily taken out of the microwave oven. <P>SOLUTION: The self-standing packaging bag to be heated by a microwave oven has a U-shaped seal part connected to a top seal part or a barrel seal part, and a cut or the like is formed in a non-sealed part surrounded by the U-shaped seal part. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
