Big bag sewing machine

The invention of the PP bag stitching machine, specifically, provided manufacturers with a fast and efficient way to produce and close bags. These machines evolved from simple stitching devices to sophisticated models equipped with features such as adjustable stitching lengths, automatic tension control, and high-speed operations. Modern machines offer increased efficiency, with some able to stitch thousands of bags per hour, thereby significantly enhancing productivity.

Understanding the PP Bag Silai Machine

Before diving into the sewing process, it's essential to understand the different types of leather. Full-grain leather is the most durable and retains the natural texture of the hide. Top-grain leather is slightly more processed and has a smoother finish. Suede is made from the underside of the hide and has a soft texture, while bonded leather combines leather scraps with synthetic materials. Each type has its own sewing requirements, so it's crucial to choose the right leather for your project.

When it comes to sewing leather, the type of thread you use is just as important as the needle. Polyester or nylon threads are highly recommended as they provide strength and durability. Avoid cotton threads, as they can easily break under tension. For added strength, consider using thicker thread, such as a 30 or 40 weight, but ensure that your machine can handle it without jamming.