Lock stitch is a sewing technique that involves interlocking two threads—one from the needle and the other from the bobbin—to create a strong seam. This method is particularly advantageous for securing the seams of jumbo bags because it provides a tight, secure closure that can withstand significant tension and pressure. Unlike other stitching methods, lock stitch produces a consistent and uniform seam, reducing the likelihood of bag failure due to seam separation.
3. Metal Components Durability is crucial in heavy-duty sewing machines. Opt for machines with a metal frame and metal internal parts, as these are more robust than their plastic counterparts. A heavy metal base not only enhances stability during sewing but also prolongs the machine's life span.
5. Juki TL-2010Q Sewing and Quilting Machine