What is polyester full stretch yarn and The production steps of polyester full stretch yarn

Polyester full stretch yarn is a type of synthetic yarn made from polyester fibers that have been engineered to have a high degree of elasticity and stretch. The yarn is designed to be used in fabrics and garments where stretch and recovery are important, such as activewear, sportswear, and other performance apparel.The full stretch capability of this yarn is achieved through a combination of the polymer structure of the polyester fibers, the spinning process used to produce the yarn, and any additional treatments or finishes applied to the yarn or fabric. The result is a durable and lightweight yarn that can provide a comfortable and flexible fit, while also maintaining its shape and performance over time.Polyester full stretch yarn is often used in combination with other fibers such as spandex or elastane to enhance its stretch and recovery properties even further. It is also commonly used in the manufacturing of technical textiles, including medical textiles, automotive textiles, and industrial textiles, where its strength, durability, and flexibility make it a versatile and cost-effective choice.

Then,The production steps of polyester full stretch yarn can vary depending on the specific process used, but the general steps include:

Polymerization: The first step is to create the polyester polymer by reacting a dicarboxylic acid (such as terephthalic acid) with a diol (such as ethylene glycol) under high temperature and pressure. This creates a liquid polymer that can be spun into fibers.Spinning: The liquid polymer is extruded through spinnerets (small holes) to form continuous filaments. These filaments are cooled and solidified as they pass through a chamber of air or liquid.Drawing: The solidified filaments are then stretched to align the polymer chains and increase their strength and flexibility. This process also increases the filaments' density and reduces their diameter, creating a finer yarn.Texturizing: The stretched filaments are then crimped or texturized to create bulk, loft, and stretch in the yarn. This process can be done by various methods, including air-jet texturing, false-twist texturing, and stuffer-box texturing.Finishing: The final step is to apply any necessary finishes or treatments to the yarn to enhance its properties, such as softness, moisture-wicking, or anti-static. The finished yarn can then be wound onto cones or bobbins and sent to textile mills for use in fabric production.

Overall, the production of polyester full stretch yarn involves a combination of chemical reactions, mechanical processes, and treatments that result in a high-performance and versatile fiber suitable for use in a variety of applications.