| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a package dispensing with an easy-peel tape by means of a seal closing line, in a packaging bag provided with a bottom seal part and a side seal part by overlapping front and rear two films and provided with the easily-peelable seal closing line and a steam extraction hole at a folding part obtained by bending the front film in a Z-shape, while taking advantages of preventing the rupture of the packaging bag by releasing steam associated with heating while preventing a splash caused by bumping during microwave oven heating. <P>SOLUTION: A seal closing line d comprises a hole peripheral part d1 surrounding a steam extraction hole x and an arc arch part d2. The arch part d2 reaching a lateral seal part a is provided so as to approach a valley-folding line 2b as it comes close to the lateral seal part. The seal strength of the hole peripheral part is equal to or smaller than that of the arch part. Peeling stress concentrates on the hole peripheral part with an increase in internal pressure caused by heating and its seal strength is small. Accordingly, the hole peripheral part is peeled, and the steam is released from the steam extraction hole without bumping. <P>COPYRIGHT: (C)2013,JPO&INPIT |
