Consistent with the type of clothing: for clothing for special purposes, sewing threads with special functions shall be considered. For example, elastic sewing threads shall be used for elastic clothing, and sewing threads with heat-resistant, flame-retardant and waterproof treatment shall be used for fire-fighting clothing. The quality and price of sewing thread shall be consistent with the grade of clothing. Sewing thread with good quality and high price shall be used for high-grade clothing, and sewing thread with general quality and moderate price shall be used for medium and low-grade clothing.

    Generally, the label of sewing thread is marked with the grade of sewing thread, used raw materials, yarn count, etc., which is helpful for us to reasonably select and use sewing thread. The sewing thread label usually includes four items (arranged in order): yarn thickness, color, raw materials and processing method, which can be expressed in the form of "60 / 2x3 white polyester thread".

    High specific strength, high specific modulus. The specific strength is more than ten times that of steel wire with the same section, and the specific modulus is second only to super grade carbon fiber. The fiber density is low, with a density of 0.97g/cm3. It can float on the water and extend indefinitely in the water. Low breaking elongation, large breaking work and strong energy absorption capacity, so it has outstanding impact resistance and cutting resistance. Anti ultraviolet radiation, neutron and γ X-ray, high specific energy absorption, low dielectric constant and high electromagnetic wave transmittance.