| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily unsealable cylindrical bag which can be smoothly torn and unsealed without being hooked during the tearing operation even if the tear is started from either of right or left side edge of the cylindrical bag when unsealing the cylindrical bag by tearing the bag in the direction orthogonal to a butt heat-sealed part. SOLUTION: The pillow-type easily unsealable cylindrical bag is formed of a laminate in which a bi-axially oriented plastic film with a cut line in the unsealing direction formed therein, an easily tearable aliphatic polyester-based oriented film, a plastic film uni-axially oriented in the unsealing direction, a base material film layer consisting of cellophane and easily tearable in the unsealing direction, an aluminum foil layer, and a heat-bonding resin layer. The cylindrical bag has a butt heat-sealed part and an edge heat-sealed part, and the butt heat-sealed part is formed so that an outer edge of the butt heat-sealed part is located at the edge on the cylindrical bag side. COPYRIGHT: (C)2006,JPO&NCIPI
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