Sewing method of woven bag seam

The strength of sewing thread depends on the type of thread (cotton thread, polyester thread), the thickness of thread (linear density), and the number of strands of thread (twist and twist direction of thread). The stitch length is too large, and the suture strength decreases; If the needle pitch is too small, the woven fabric will be punctured and the strength will also decrease. The shape of the chain sleeve of the suture, whether it is single or double, and the tightness of the thread sleeve, whether it can be removed from one end. Sewing and splicing methods include crimping, folding, binding, overlapping, etc. It includes crimp width, hem width, binding width and method, overlap amount and method, and the distance from the suture to the bottom. When stitching, the stitch should be flat and free from defects such as sleeve dropping, skipped stitches, needle dropping, and unstitched upper hem. The needle spacing should be uniform, and the thread head should be reserved for more than 50mm after suture to prevent chain stitch from tripping.