I. Three Major Optimization Measures to Improve Fabric Elasticity

General Overview: To effectively improve the elasticity of fabrics with the same specification, we carry out targeted optimization in three core processes: raw material selection, weaving control, dyeing and finishing setting, so as to guarantee the stretching and recovery performance of Elastic fabrics from the source.

1.Scientific Raw Material Selection

Match spandex and base yarn with reasonable specifications. Common spandex specifications on the market include 20D, 40D and 70D. For 150D polyester DTY, the standard matching option is 40D spandex. If 20D fine denier spandex is used blindly to reduce costs, the spandex will have insufficient bearing capacity and cannot drive the rebound of thick 150D polyester yarn, resulting in poor fabric elasticity. Therefore, reasonable matching of fiber denier is the foundation of good elasticity.

2.Weaving Process Optimization

Moderately reduce warp and weft density to loosen the fabric structure and reserve stretching allowance for yarns. Adopt low-tension weaving throughout the looms, and prohibit forced stretching of grey fabrics during production to avoid locked fiber deformation, reserving sufficient physical space for spandex stretching.

3.Precise Dyeing and Finishing Control

Strictly control the setting temperature. Excessively high temperature will age and deactivate spandex, causing permanent loss of elasticity; excessively low temperature will lead to unqualified washing and ironing shrinkage of fabrics. Before delivery, add a steam felt pre-shrinking process, and adopt overfeeding to realize natural shrinkage of fabrics and release the potential elasticity of the fabrics.

II. Why Do Fabrics of the Same Specification Have Great Elasticity Differences?

General Overview: Elastic Fabric with the same market name (such as 100D four-way stretch fabric) are divided into low-elasticity, medium-elasticity and high-elasticity types. The fundamental differences lie in three aspects: raw material specifications, weaving parameters and dyeing & finishing processes.

1.Cutting Corners on Raw Material Formula

The original standard formula for 100D four-way stretch fabric: 100D polyester DTY wrapped with 40D spandex, with a composition ratio of 91% polyester + 9% spandex. To cut costs, some manufacturers replace it with 110D thick polyester yarn + 20D fine spandex, changing the composition to 96% polyester + 4% spandex. The thicker polyester yarn and sharply reduced spandex content lead to insufficient elasticity and rough hand feel of finished fabrics.

2.Differences in Weaving Density and Fabric Structure

Elastic Fabric with the same yarn count and spandex content, fabrics with lower density and lighter grammage have better elasticity; higher warp and weft density makes the fabric tight and reduces stretching performance. For example, among 100D four-way stretch fabrics, the fabric with 90 ends per inch has better elasticity than the one with 115 ends per inch.
Under the same yarn count, spandex content and density, the elasticity ranking of different fabric structures is: twill > mini jacquard > satin > plain weave. Twill fabric has larger yarn interweaving gaps, while plain weave has a compact structure with minimum shrinkage space.

3.Non-standard Setting Operation in Dyeing Factories

Some dyeing factories adopt high temperature and fast machine speed for setting to improve production efficiency elastic Fabric, which causes spandex aging and elasticity loss. In addition, some fabric manufacturers forcibly stretch and widen fabrics during setting to increase output length. Normally, 100 meters of grey fabric can be made into 62 meters of finished fabric, while over-stretching can turn 100 meters of grey fabric into 75 meters of finished fabric. The spandex is permanently stretched, resulting in greatly reduced fabric elasticity.

III. Four Practical Advantages of Choosing Our High-Elastic Fabrics

General Overview: Compared with low-cost low-elasticity fabrics on the market, our high-elasticity fabrics manufactured with high-standard processes have prominent values in wearing experience, garment production and product profitability.

1.Excellent Stretching and Recovery Performance

The fabric has sufficient stretching allowance in both warp and weft directions, bringing no tight restraint when raising arms, bending over or squatting. Ordinary low-elasticity fabrics limit body movement, and slim-fit styles are prone to tight binding and bulging deformation after wearing.

2.Stable Size and Controllable Shrinkage

Adopting professional pre-setting and mechanical pre-shrinking processes, the washing shrinkage and ironing shrinkage of the fabric are strictly controlled within ±2%, avoiding garment scrapping caused by shrinkage after washing.

The Importance of Dimensional Stability in Woven Elastic Fabrics – Two Real-World Case Studies

3.Lower Garment Processing Loss

The fabric has uniform elasticity and stable surface tension, with flat sewing effect without wrinkles and yarn deviation, effectively improving sewing efficiency. Inferior fabrics have unstable elasticity, which is easy to cause twisting and deformation during sewing, leading to high defective rate of finished garments.

4.High Premium Space for Terminal Products

For garments with the same design, products made of our high-elastic fabrics can be priced 15%~35% higher than those made of ordinary bulk fabrics. Consumers are willing to pay for comfortable wearing experience, which significantly increases the gross profit of single products and helps brands get rid of low-price competition.