Powder and granular packaging bag and its making method

【Abstracts】 The invention discloses a powder and granular package bag and a manufacturing method thereof. The bag body has a square shape, and the bag body has a sealing tape formed by bonding two bag walls on the upper end of the bag body. A line at the upper end of the bag body is printed with an opening line The width of one end of the sealing tape (1) printed with the opening line (2) is obviously smaller than the width of the middle and the other end of the sealing tape, and it is printed with the underside of one end of the opening line (2) concave toward the sealing tape. The notch (3) is inserted to make the sealing strip watt-shaped. The above design enhances the strength of the two bag walls at the corner opening of the packaging bag and makes the opening substantially closed during the bagging period. So that the bag items to avoid pollution and not easy to damp.
【Sovereignty Items】 1. A powder and granular packaging bag with a square shape and a sealing tape (1) formed by bonding two bag walls at the upper end of the bag body. An opening line is printed at the upper corner of the bag body ( 2) It is characterized in that the width of one end of the opening line (2) printed on the upper end sealing tape (1) of the bag body is obviously smaller than the width of the middle and the other end of the sealing tape (1).