| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag capable of achieving both of shortening time required for air removal and making dust hardly enter the bag.SOLUTION: A packaging bag 6 has a film 8 formed in a cylindrical shape. One end 16 of the packaging bag 6 is closed by sealing portions 20 joining upper and lower films. The other end 18 is open in order to put an article therein and is sealed after the article is put in. The sealing portion 20 has a plurality of air removal holes 24 formed by not joining the upper and lower films, and communicating with the inside and outside of the bag. Each air removal hole 24 is trapezoidal in the planar shape thereof such that a part communicating with the inside of the bag is wider than a part communicating with the outside of the bag. |
