Understanding the 4 Thread Flatlock Stitch- A Comprehensive Guide

The 4 thread flatlock stitch is a popular sewing technique used in the apparel industry to create high-quality, durable flat seams. It is commonly used on sportswear, swimwear, and activewear garments, as well as for decorative finishes on t-shirts and other casual wear. This guide will explore what it is, how it is achieved, and its key benefits.

The 4 thread stitch is a seam that joins two pieces of fabric together with a flat, smooth finish. It is created by using a specialized overlocker or serger machine that has four threads, two-needle threads, and two loopers. Unlike a regular overlock stitch, which has a raised seam, the flatlock stitch is completely flat on both sides, making it ideal for comfortable, non-chafing seams on athletic clothing.

To form a flatlock stitch, a seam is sewn in two layers of fabric with the wrong sides facing each other. The needle threads are inserted through the fabric layers, while the loopers are threaded through the back. The needle threads and loopers are then interlocked to form a flat, secure seam that stretches with the fabric. The stitches provide a smooth finish on both sides of the fabric, resulting in a seamless look.

1. Durable and Strong:

The interlocking of the needle threads and loopers creates a strong, durable seam that can withstand stretching and movement, making it ideal for sportswear and activewear.

2. Flat and Comfortable:

The flatlock stitch allows the fabric to sit flat against the skin, making it comfortable and non-chafing. This is particularly important in athletic clothing where the seams can rub against the skin during movement.

3. Decorative:

The flatlock stitch can also be used decoratively to give a unique and stylish look to casual wear. It is often seen on t-shirts and sweatshirts as a decorative finish.

4. Easy to Achieve:

While the 4 thread stitch requires a specialized machine, it is relatively simple to achieve once the machine is set up correctly. Even for beginners, the flatlock stitch can be quickly mastered with some practice.

The 4 thread flatlock stitch is a popular and versatile sewing technique that provides a durable, flat finish to seams. It is widely used in sportswear, swimwear, and activewear due to its comfortable and non-chafing properties. To achieve this stitch through a machine, a specialized sewing machine called an overlocker is used, if you need to purchase, please contact: wym@eagleco.cn