Recycled polyester yarn is now generally used in the filler industry of furniture and toys, bedding, clothing industry, cotton industry, and stitched fabric industry. Semi-finished products are mainly tested for the viscosity of oil-free silk. Recycled polyester staple fiber is a few centimeters to ten centimeters of short fibers. In particular, the sub-threads of polyester curtains for tires are close to nylon in performance. Polyester yarns can also be used as electrical insulating materials, acid-resistant filter cloths, and medical industrial cloths. Synthetic fibers are widely used in various fields of the national economy due to their high strength, wear resistance, acid resistance, alkali resistance, high temperature resistance, light weight, warmth retention, good electrical insulation and no fear of mildew. .

Polyester dyed yarn has high strength. The strength of short fiber is 2.6-5.7cN/tex, and the strength of high-strength fiber is 5.6-8.0cN/tex. Due to its low hygroscopicity, its wet strength is basically the same as its dry strength. The impact strength is 4 times higher than that of nylon and 20 times higher than that of viscose fiber. Good elasticity. The elasticity is close to wool, and it can almost fully recover when it is stretched 5-6. The wrinkle resistance exceeds other fibers, that is, the fabric does not wrinkle and has good dimensional stability. The elastic modulus is 22~141cN/. Heat-resistant polyester dyed yarn is made by melt-spinning method, and the formed fiber can be heated and melted again, which belongs to thermoplastic fiber. The melting point of polyester dyed yarn is relatively high, while the specific heat capacity and thermal conductivity are small, so the heat resistance and thermal insulation of polyester dyed yarn fiber are higher. It is the best among synthetic fibers. Polyester has a smooth surface and tightly arranged internal molecules. Polyester is a synthetic fabric with good heat resistance and thermoplasticity, which can be made into pleated skirts and pleats. At the same time, polyester fabric has poor melting resistance, and it is easy to form holes when encountering soot, sparks, etc. Therefore, try to avoid contact with cigarette butts, sparks, etc. when wearing.

Polyester sewing thread is used to sew all kinds of clothing materials and has dual functions of practicality and decoration. The quality of the sewing thread not only affects the sewing effect and processing cost, but also affects the appearance quality of the finished product. Therefore, the general concept of suture formation, viscosity, the relationship between viscosity, suture classification, characteristics and main uses, and the selection of sutures are introduced to facilitate enterprises to formulate standards and conduct relevant tests. Wire. Polyester sewing thread - made of polyester filament or staple fiber, with high strength, good elasticity, wear resistance, low shrinkage and good chemical stability. However, the melting point is low, the high speed is easy to melt, the needle eye is blocked, and the thread is easy to break. Pay attention to the selection of the needle. Mainly used for denim, sportswear, leather products, wool and military uniforms, etc., it is the most widely used and popular sewing thread at present.