Heavy-Duty Sewing Machines: These machines are generally more durable than home machines. They often have a metal frame and parts. Some parts may still be made of plastic, though. They are made to last, but not necessarily for continuous, long-term use.
Heavy-duty denim thread is typically made from polyester or cotton, providing a strong and resilient structure that can withstand the strain of heavy fabrics. Its thickness, which is significantly greater than standard sewing threads, allows it to create strong seams that can endure wear and tear. Furthermore, heavy-duty denim thread is often pre-waxed or treated to enhance its grip and prevent fraying, ensuring that the seams remain intact even after extensive use.
In addition to its aesthetic benefits, double needle stitching also has functional advantages. The parallel lines of stitching distribute the tension evenly along the seam, making it stronger and less likely to stretch or break. This makes double needle stitching particularly useful for garments that are put under a lot of strain, such as activewear or workwear.