Select the size of the needle after sewing, and then select the suture. Sutures are blunt cotton, polyester cotton, blends, polyester, and rayon, generally, from the two, three, four, six single-twisted yarn twist, the direction of twist can be divided into s twist and Z twist two. Lockstitch sewing machine is generally used Z twist thread, good quality S twist in other sewing machines can also be applied. Cotton sewing thread sewing performance is good, but in the washing shrink than the synthetic fiber line, its strength, chemical resistance, and abrasion than synthetic fiber are also poor, high-quality mercerized cotton thread is expensive, it is now rarely used cotton sewing line. Staple fiber polyester sewing thread is a low cost, excellent stitching stability, durability, and sewing property, so it is suitable for all conventional garment sewing. Sewing machine sewing thread is generally cotton, but the current high cost of cotton fibers, it is generally replaced by polyester-cotton line.
In the selection of the thickness of the suture should first consider the use of fine sewing thread, from the following aspects:
- Locked stitch sewing machine The bobbin volume is limited, the use of smaller sewing thread can accommodate longer sewing thread, save shuttle time can get high work efficiency.
- Fine sewing thread small size, chain sewing feel good.
- Small sewing thread sewing space is very small, less cause fabric deformation and sewing wrinkle.
- Fine sewing thread can use a small number bowl, in order to avoid fabric needle hole.
- Fine sewing thread can also reduce the prominent seam marks, so that the inner surface of the fabric surface and reduce the impact of wear.