When making plastic packaging bags, if you use new and old materials to mix, you must pay special attention to the uniformity of the mixing. When sewing, there are also strict requirements for strength. In the national standard, the tensile load in the seam direction and the seam bottom direction of the plastic packaging bag is clarified. Regarding the laminated cold-cut bag, it is recommended that the plastic packaging bag should be crimped because the seam at the cold-cut edge may come from the warp. Tear out together with the weft.
For the woven bag with no strength requirement, the packing bag has one round top stitching, the stitch pitch can be dense, and the thread can be thin. In addition, with regard to the tensile strength of the main body of the plastic packaging bag, it is required to reach more than 67% of the basic strength, and the tensile strength of the bottom joint must reach more than 42% of the basic strength. In fact, the main factors that affect the stitching strength of plastic packaging bags include the varieties and types of stitches, the size of the stitch length, stitches, the size of the seam from the crimping or hemming to the edge of the bag, and the hot and cold cutting methods.
In normal times, we often hear people talking about bone-fitting packaging bags. What is this bone-fitting packaging bag?
In fact, the bone-fitted packaging bag is a plastic bag. It has two hard plastic strips in the mouth, and the two are sealed together. They are also called clavicle bags, compact bags, sealed bags, yoren bags, and ziplock bags. sealed bag. Just because there are two yin and yang plastic bones at the mouth of the bag, it is also called a bone bag.
The two yin and yang bones on the sticking bag are separated, and the material is normally blown film. The yin and yang bones are pasted during the bag making process. This kind of yin and yang bones are produced separately.