A linha de costura é usada para costurar vários materiais de vestuário, que têm duas funções de praticidade e decoração.

Classification, Characteristics and Main Uses of Sewing thread

The quality of sewing not only affects the sewing effect and processing cost, but also affects the appearance quality of finished products. Therefore, the general concept of seam formation, twist, the relationship between twist and strength, seam classification, characteristics and main uses, seam selection are introduced in order to facilitate enterprises to formulate standards and carry out relevant tests, and to determine seams pertinently.

 According to the raw materials, it can be divided into three categories: natural fiber sewing thread, synthetic fiber sewing thread and mixed sewing thread.

1. Natural fibre thread

Cotton sewing thread ----a sewing thread made from cotton fibre by refining, bleaching, sizing and waxing. Cotton thread can be divided into light-free (or soft), silk and wax light. It has high strength and good heat resistance. Suitable for high speed sewing and durable pressing. It is mainly used for sewing cotton fabrics, leather and high temperature ironing clothes, but its disadvantages are poor elasticity and wear resistance.

Silk yarn ---- filament or silk yarn made of natural silk, has excellent gloss, and its strength, elasticity and wear resistance are superior to cotton yarn. Suitable for sewing all kinds of silk clothing, high-grade woolen clothing, fur and leather clothing, etc.

2. Sewing thread of synthetic fibers

Polyester sewing thread ---- made of Polyester filament or staple, has high strength, good elasticity, wear resistance, low shrinkage and good chemical stability. However, due to its low melting point, easy melting at high speed, blocking needle eyes and breaking thread, attention should be paid to the selection of machine needles. Mainly used for jeans, sportswear, leather products, wool and military uniforms, is the most widely used thread.

Nylon sewing thread ---- made of pure nylon polyfilament, divided into filament yarn, staple yarn and elastic textile and garment ingredients force deformation yarn. At present, filament yarn is commonly used. It has large elongation and good elasticity, and its tensile length at breaking moment is three times longer than that of cotton yarn of the same specification. It is used for sewing chemical fibers, wool, leather and elastic clothing. The greatest advantage of nylon sewing thread is transparency. Because of its transparency and good color, it reduces the difficulty of sewing wiring and has broad prospects for development. However, in the current market, the stiffness and strength of transparent yarns are too large, and the stitches are easy to float on the surface of fabrics. In addition, the stitching speed can not be too high because of the high temperature resistance. At present, this kind of thread is mainly used for applique, cutting edge and other parts which are not easy to bear force.

Vinylon Sewing thread ---- made of Vinylon fiber, has high strength and smooth stitching. It is mainly used for sewing thick canvas, furniture cloth, labor protection articles and so on.

Acrylic Sewing thread ---- made of acrylic fibers with low twist and bright dyeing. It is mainly used for decoration and embroidery.

3. Mixed sewing thread

Polyester-cotton sewing thread ---- made of 65% Polyester and 35% cotton. It has the advantages of both Polyester and cotton. It has high strength, wear resistance, heat resistance and shrinkage. It is mainly used for high-speed sewing of all kinds of clothing, such as cotton, Polyester and cotton.

Core-wrapped sewing thread  ---- filament as core, wrapped in natural fibers, strength depends on the core, wear resistance and heat resistance depends on the wrapped yarn, mainly for high-speed and solid garment sewing.