Cotton sewing thread

How does sewing thread affect the operation effect of the sewing machine?

In sewing work, the sewing machine and the sewing thread complement each other, and the performance and characteristics of the sewing thread largely determine the operating effect of the sewing machine. From the aesthetics of the stitches to the smoothness of the sewing process, from the wear level of the equipment to the service life, every link is closely related to the sewing thread. A deep understanding of the impact of sewing thread on the operation effect of sewing machines will help us choose the right sewing thread and improve the quality and efficiency of sewing.

There are significant differences in physical properties of sewing threads of different materials, which in turn affects the operation of the sewing machine. As a natural fiber material, cotton thread has a soft texture and strong hygroscopicity. When running on a sewing machine, the friction with the needle hole and cloth feeding teeth is relatively small, which generally allows the sewing machine to run smoothly. However, the strength of cotton thread is relatively low, especially when sewing heavy fabrics or high-speed sewing, it is prone to breakage, resulting in frequent thread breakage and shutdown of the sewing machine, affecting work efficiency. Moreover, the characteristics of cotton thread have good hygroscopicity. In a relatively high humidity environment, it will increase its own weight and friction coefficient, increase the operating resistance of the sewing machine, and may even lead to uneven stitches.

Polyester thread has high strength and good wear resistance. It is suitable for long-term high-speed operation on a sewing machine. It can effectively reduce the problem of thread breakage and ensure the consistency of the sewing process. However, polyester thread has poor hygroscopicity and is prone to static electricity in dry environments, adsorbing dust and fiber debris. These impurities will clog key parts such as needle holes and shuttle beds of the sewing machine, increase operating resistance, affect stitch quality, and may aggravate component wear. At the same time, the polyester thread has a hard texture. When passing through the thinner needle hole, it may cause greater friction with the needle hole, causing the sewing thread to heat up and bleed, further affecting the operating stability of the sewing machine.

The silk thread has a bright luster and soft feel, but the wear resistance of the silk thread is poor. After repeated friction between the needle and the fabric of the sewing machine, it is prone to bleed and breakage. Moreover, the price of silk thread is relatively high, and frequent replacement will increase production costs. In addition, nylon thread has good elasticity and strong elasticity, and is often used in sewing scenes where stretching is required, but its heat resistance is poor. At the high temperature caused by the high speed of the sewing machine, nylon thread is prone to soften, deform, and even stick to the sewing machine parts, causing operational failure.

2. The impact of sewing thread thickness on the operation of sewing machine

The thickness of the sewing thread is directly related to the adaptability of the needle hole of the sewing machine and the formation of stitches. If excessively thick sewing thread passes through smaller needle holes, it will increase friction between the sewing thread and the needle hole. It will not only easily cause the sewing thread to break, but may also damage the needle, enlarge and deform the needle hole, affecting the normal passage of subsequent sewing threads. At the same time, when sewing thin fabrics that are too thick, they will leave obvious traces on the surface of the fabric, affecting the aesthetics. Since the stitches are too thick, the sewing machine may stutter during the cloth feeding process, resulting in uneven stitching.

On the contrary, when used to sew thick fabrics, it is easy to be pulled off during the sewing process due to insufficient strength. Moreover, when the thin sewing thread is running on a sewing machine, it is difficult to adjust the tension. Too much tension is likely to break the thread. Too little tension will lead to loose and unstable stitches. In addition, too thin sewing thread may not be able to cooperate well with the bottom thread in the shuttle bed of the sewing machine, and problems such as stitch distortion and needle jumping may occur, which will affect the normal operation of the sewing machine and the quality of the sewing machine.

3. The influence of sewing thread twist on the operation of the sewing machine

The twist of the sewing thread determines its structural tightness and surface smoothness, and has an important impact on the operating effect of the sewing machine. The sewing thread with too low twist is loose, and lints are prone to occur during the operation of the sewing machine. The fibers after lint will be wrapped around the needles, shuttle beds and other components, increasing the operating resistance, affecting the formation of stitches, and even causing thread breakage. Moreover, the strength of the sewing thread with too low twist is relatively low, and it cannot withstand the tension during the operation of the sewing machine and is prone to breaking.

Although the strength of the sewing thread with excessive twist increases, its flexibility becomes worse and its texture becomes harder. When such sewing thread passes through the needle hole and yarn guide of the sewing machine, the friction force increases, which easily generates heat, resulting in brittleness and breakage of the sewing thread. In addition, during the sewing process, the stitches have poor elasticity and elasticity. When the sewing fabric is stretched or bent, the stitches are prone to break, affecting the wear comfort and durability of the clothing. At the same time, high twist sewing thread may also cause greater noise when the sewing machine is running, increasing wear of the equipment.

4. The impact of sewing thread tension on the operation of sewing machine

The tension adjustment of sewing thread is a key factor in ensuring the normal operation of the sewing machine and the quality of the stitch. If the surface thread tension is too high, the sewing thread will be too tightened, resulting in the increase in resistance of the needle when piercing the fabric, which is prone to needle breakage and thread breakage. At the same time, the stitch will form depressions on the surface of the fabric, affecting the aesthetics. Moreover, excessive surface thread tension will increase the load of the sewing machine's fabric feeding mechanism and reduce the service life of the sewing machine.

The tension of the surface thread is too small and the sewing thread is loose, and the stitches will become loose, making it impossible to securely fix the fabric, and it is easy to fall off during use. The bottom line tension is equally important. Too much bottom line tension will cause the bottom surface of the stitch to protrude, and even pull the surface line into the shuttle bed; too little bottom line tension will cause the bottom surface of the stitch to be loose and floating line problems will occur. Therefore, reasonably adjusting the tension of the sewing thread, so that the surface thread and the bottom thread are well intertwined in the middle of the fabric, forming flat and uniform stitches, is a necessary condition to ensure the normal operation of the sewing machine and obtain high-quality sewing effects.

Sewing thread has an important impact on the operating effect of the sewing machine from its material, thickness, twist to tension. Only by fully understanding these influencing factors, selecting appropriate sewing threads according to specific sewing needs, and reasonably adjusting the sewing machine parameters can we ensure smooth operation of the sewing machine, sewing high-quality products, and extending the service life of the sewing machine.