What is unique about the stretchability of low-stretch polyester rib knitted fabrics?

1. Effect of material properties on stretchability

Polyester has the advantages of high strength, high modulus and wear resistance. Its molecular structure is compact and its crystallinity is high, which makes the polyester fiber show a high initial modulus and tensile strength during stretching. However, pure polyester fiber has poor elasticity and needs to be physically or chemically modified to improve its tensile properties. Low-stretch polyester is modified by treating polyester fiber to make it have a certain elasticity while maintaining high strength and high wear resistance. The elasticity of low-stretch polyester is between that of high-stretch fiber and ordinary polyester, and it is suitable for textiles that require moderate elasticity. This modification not only improves the stretchability of polyester fiber, but also enables it to maintain good shape and performance after multiple stretching.

2. Effect of rib knitting structure on stretchability

2.1 Characteristics of rib knitting structure

Rib knitting is a common knitting structure characterized by obvious longitudinal stripes and good transverse elasticity. The rib knitted structure increases the surface area and porosity of the fabric by forming alternating ridges and valleys in the fabric, thereby improving the stretchability of the fabric. This structural design enables the fabric to evenly share stress when subjected to external forces, avoiding deformation or damage caused by local overstretching.

2.2 Mechanical properties of rib knitted structure

The mechanical properties of the rib knitted structure have an important influence on its stretchability. Due to the particularity of the rib knitted structure, the fabric exhibits uniform stretch distribution when stretched. When subjected to external forces, each part of the fabric can evenly share stress, avoiding deformation or damage caused by local overstretching. This uniform stretch distribution makes the fabric more durable and stable during use.

3. Unique performance of stretchability

3.1 Moderate stretch range

Low-stretch polyester rib knitted fabrics exhibit a moderate stretch range in terms of stretchability. Compared with high-stretch fabrics, low-stretch fabrics have a smaller stretch range, but are sufficient to meet the needs of daily wear and use. This moderate stretchability makes the fabric neither too tight nor too loose when worn, providing good comfort and fit.

3.2 Uniform stretch distribution

Due to the particularity of the rib knitted structure, low-stretch polyester rib knitted fabric shows uniform stretch distribution when stretched. When subjected to external force, each part of the fabric can evenly share the stress and avoid deformation or damage caused by local excessive stretching. This uniform stretch distribution makes the fabric more durable and stable during use.

3.3 Good resistance to tensile fatigue

Low-stretch polyester rib knitted fabric can still maintain good shape and performance after multiple stretching. The high strength and wear resistance of polyester fiber make the fabric less prone to fatigue damage during repeated stretching and recovery. The rib knitted structure further enhances the fabric's resistance to tensile fatigue, allowing it to maintain good elasticity and appearance during long-term use.