Polyester, commonly known as "polyester fiber," is a synthetic fiber made from chemical polycondensation of organic dicarboxylic acids and diols. It falls under the category of high molecular compounds. Its invention can be traced back to the 1930s, and today it is one of the most significant types of synthetic fibers.

Polyester fibers possess numerous advantages. Firstly, they exhibit excellent wrinkle resistance and shape retention, meaning garments made from polyester do not easily wrinkle during wear and can maintain their original shape. Secondly, polyester fibers have high strength and elasticity recovery, making fabrics both durable and capable of quickly returning to their original state after stretching. Additionally, polyester fibers are resistant to wear and do not attract lint, keeping the fabric looking neat and tidy.

Polyester is a synthetic fiber characterized by its high strength, high modulus, and low water absorption, leading to widespread applications in both civil and industrial textiles. As a textile material, polyester staple fibers can be spun purely or blended with other fibers. They can be mixed with natural fibers such as cotton, linen, and wool, or with other chemical short fibers like viscose rayon, acetate fibers, and acrylic fibers. The resulting imitation cotton, wool, and linen fabrics typically retain polyester's superior properties, including wrinkle resistance, dimensional stability, abrasion resistance, and non-deformation after washing. By blending with hydrophilic fibers, some inherent drawbacks of polyester, such as static electricity, dyeing performance, and breathability, can be mitigated and improved to some extent.

Textured polyester filament (DTY) is mainly used for weaving imitation silk fabrics and can also be interwoven with natural fibers or chemical short fiber yarns, or even with silk or other chemical fiber filaments. This interwoven fabric retains a series of advantages of polyester and features high bulkiness, large curliness, strong fur-like texture, softness, etc., suitable for producing imitation wool, tweed suit materials, outerwear, jackets, and various decorative fabrics such as curtains, tablecloths, sofa fabrics, etc.

Polyester air-textured yarn (ATY) and textured yarn have good cohesion and smoothness, suitable for direct use on water jet looms, particularly for weaving imitation silk and lightweight fabrics, but can also be applied to medium-weight fabrics.

The application of polyester fibers in industries, agriculture, and new technology fields is increasingly broad, such as manufacturing tire cords, conveyor belts, ropes, electrical insulation materials, etc. With high strength and initial modulus, as well as excellent heat resistance, fatigue resistance, and shape stability, polyester high-strength fibers are especially suitable for spinning tire cords, which can reduce the flat spot phenomenon of tires.

Polyester fibers play an important role in various fields, providing diversified choices for our lives and production.