In the production of plastic packaging bags, there are strict requirements for the seam of the packaging bags. Here are some requirements for stitching. If new and old materials are used for compounding, special attention should be paid to the uniformity of mixing. At the time of stitching, there are strict requirements regarding the strength.
plastic bag
1. In the national standard, the tensile load of the seam side and bottom direction of the plastic packaging bag is clarified. Regarding the cold-cut bag of the laminating film, it is advocated that the plastic packaging bag should be rolled, because the seam of the cold-cut edge may The silk is torn out together with the weft. On the woven bag without strength requirements, the upper edge of the woven bag is locked for a week, the stitch length can be dense, and the thread can be thin. In addition, regarding the tensile strength of the main joint portion of the plastic packaging bag, it is necessary to reach more than 67% of the basic strength, and the tensile strength of the bottom joint portion must reach more than 42% of the basic strength.
2. The main factors that affect the sewing strength of plastic packaging bags, including the type and model of the suture, the size of the stitch length, the stitching, the size of the crimped or folded seam to the edge of the bag, hot and cold cutting methods, etc.