| 摘要 |
A packaging bag comprises a bag body (1), the first heat sealed portion (5), and the second heat sealed portion (5) and a tear-starting portion. The bag body is made of a plastic laminate film having a pair of opposite side edges (2, 3). The bag body is formed by bringing the pair of opposite side edges into contact with each other and heat-sealing them (4) over their entirety to form a tubular shaped body having a rear heat sealed (4) portion, and collapsing the tubular shaped body into a flatten shaped body having a front face, a rear face opposing the front face, a pair of opposite side edge (2, 3) portions connecting the front face and the rear face to each other, a first opened portion and a second opened portion opposing the first opened portion. The rear heat sealed portion is placed on the rear face. The first heat sealed portion is formed by heat-sealing the first opened portion (5). The second heat sealed portion is formed by heat-sealing the second opened portion (6). The tear-starting portion is provided on at least one of the pair of opposite side edge portions and the rear heat sealed portion. The tear-starting portion (7) comprises fine concavities opening outwardly. |
