Sewing thread is the main thread for sewing all kinds of clothing fabrics. It has both practical and decorative functions. The quality of the sewing thread not only affects sewing efficiency and processing costs, but also affects the appearance quality of the finished garment.
Classification and characteristics of sewing thread
Wholesale clothing sewing thread is divided into three categories according to raw materials: natural fiber sewing thread, synthetic fiber sewing thread and blended sewing thread.
1. Natural fiber sewing thread
Cotton sewing thread: Sewing thread made of cotton fiber through refining, bleaching, sizing, waxing, etc. Cotton thread can be divided into matt (or flexible), mercerized and waxed.
Cotton thread has the characteristics of high strength and good heat resistance. Suitable for high-speed sewing and durable pressing. Mainly used for high temperature ironing and sewing of cotton, leather and clothes. The disadvantages are poor elasticity and poor wear resistance.
Silk thread: Filament or silk thread made of natural silk has excellent luster, its strength, elasticity and abrasion resistance are better than cotton thread. It is suitable for sewing various silk clothing, high-grade wool clothing, fur clothing, etc.
2. Synthetic sewing thread
A. Polyester sewing thread: It is the most widely used sewing thread, which is made of polyester filament or short fiber. Polyester sewing thread has the characteristics of high strength, good elasticity, wear resistance, low shrinkage, and good chemical stability. It is mainly used for sewing jeans, sportswear, leather products, wool and military uniforms. It should be noted here that polyester sutures have a low melting point and are easy to melt during high-speed sewing, blocking the eye of the needle and causing the suture to break, so it is necessary to choose a suitable needle.
Nylon sewing thread: Nylon sewing thread is made of pure polyamide and is divided into filament thread, short fiber thread and elastic deformation thread. It has the advantages of high elongation and good elasticity. The tensile length at break is three times higher than that of cotton of the same specification. The biggest advantage of nylon sewing thread is its transparency. Because of its high transparency and good color, it reduces the difficulty of sewing threads and has broad application prospects. But limited to the current market, the rigidity of the transparent thread is too large, the strength is too low, it is easy to float on the surface of the fabric stitching, and coupled with the high temperature, the sewing speed cannot be too high. At present, this production line is mainly used for wearing parts such as decals and cutting edges.
C. Vinylon Sewing Thread: Made of Vinylon fiber, it has high strength and stable stitching. It is mainly used for sewing coarse canvas, furniture cloth, labor protection supplies, etc ..
d, acrylic sewing thread: made of acrylic fiber and mainly used for decorative embroidery thread, when the twist of the yarn is low, the brightness of the color.
3.Mixed sewing thread
A. Polyester cotton sewing thread: made of 65% polyester and 35% cotton. It combines the advantages of polyester and cotton. Polyester cotton sewing thread can meet the requirements of strength, abrasion resistance and shrinkage, as well as overcome the defects of polyester heat resistance. Suitable for high-speed sewing, can be used for cotton, polyester cotton and other clothing.
Core-covered sewing thread: The core is made of filament, covered with natural fiber, and is made of sewing thread. The strength of the cored sewing thread depends on the cored thread, and the abrasion resistance and heat resistance depend on the cored yarn. Therefore, the core coated sewing thread is suitable for high-speed sewing, as well as clothing that requires higher sewing ruggedness. Make full use of the principles that sewing threads should follow, and comprehensively evaluate the quality of sewing threads.
Sewing property refers to the ability of a sewing thread to form good stitches and maintain certain mechanical properties under certain conditions. While ensuring seamability, the sewing thread must be used correctly. To this end, the following principles should be followed:
(1) Compatibility with fabric properties
The sewing thread manufacturers and the fabric materials are the same or similar. In order to ensure the uniformity of shrinkage, heat resistance, abrasion resistance, durability, etc., the difference between the thread and the fabric is avoided, which causes the appearance to shrink.
(2) is consistent with the type of clothing
Special-purpose clothing should consider special-function sewing threads, such as elastic sewing threads for elastic clothing, heat-resistant, flame-retardant, and waterproof sewing threads for fire protection clothing.
(3) Match trace mode
The specifications of the sewing thread should be changed according to different parts of the garment, such as expansion threads or deformed threads. The double threads should be extended threads. The lower and shoulder stitches should be fastened. The eyeliners should be wear-resistant, such as loose or deformed threads. The double thread should be selected from the extension line, the shoulder seam, the shoulder line should be fastened, the eyeliner should be abrasion-resistant, the suture should be replaced with different parts of the clothing, and the suture should be replaced with it.