1. Introduction

Spandex for warp-knitting is a specialized elastic fiber engineered to withstand high-intensity workloads on modern warp-knitting machines (such as Karl Mayer). This yarn is a decisive factor in the flatness, uniformity, and multi-directional elasticity of premium fabrics like Tricot or Raschel.

Specially designed for high-grade warp-knitting fabrics with a patented technology, it is an elastic fiber characterized by chlorine-resistance, high-temperature resistance and little electrostatic. It adopts special formula and additives to form outstanding synthetic properties, manifesting the glamour of comfort, fitness and free movements.

2. Composition

Essentially a long-chain Polyurethane polymer, this fiber is enhanced with:

• Physical Uniformity: The fiber diameter is strictly controlled to prevent "streaks" – a critical defect in warp-knitting.

• Specialized Finish Oil: A unique silicone-based lubricant is applied to minimize friction and prevent static electricity as the yarn passes through knitting needles at high speeds.

3. Key Characteristics

Excellent Heat-resistant Property
With excellent heat-resistant property, it allows the fabrics designs with more innovation and creativity thus ensure the cloth to be more colorful and lead the new consumption tendency

Excellent Homogeneity
The requirement of high-end fabrics can be satisfied by excellent homogeneity, which makes the cloth more flat and beautiful as well as meets the requirements fashion design.

High Chlorine-resistant Property
Outstanding chlorine-resistant property can keep the spandex from damaging its elasticity in the active chlorine environment, and therefore ensure swimsuits more suitable and comfortable. The property lead the consumers to a fully experience of soft, comfort and consideration

Test conditions for chlorine resistance: the chlorine resistant bare yard was placed in the environment with pH 7.0 as well as the active chlorine concentration 0.6 %. Soaking 24hr, taking out and measuring the breaking strength DS of spandex, the chlorine resistance % is DS (chlorine bleaching)/DS (original) * 100

• High Tenacity: Capable of enduring significant tension during warping and knitting processes without breakage.

• Excellent Thermal Stability: Maintains structural integrity during heat-setting, preventing fabric curling.

• Uniform Elasticity: Ensures consistent stretch across the entire fabric surface, resulting in an absolutely smooth and flat finish.

• Smooth Unwinding: Precision winding techniques allow for consistent yarn release from the spool, preventing tangles.

4. Technical Specifications Table

5. Applications

• High-Grade Tricot: Used for bra cup linings and shapewear.

• Swimwear & Sportswear: 4-way stretch fabrics requiring a firm, smooth, and durable surface.

• Mesh & Net Fabrics: Applied in sports fashion and garment accessories.

• Automotive Interiors: Headliners and seat upholstery due to high dimensional stability.

6. Conclusion

Spandex for high-grade warp-knitting is more than just an elastic material; it is a product of precision. It enables textile manufacturers to minimize defect rates, increase production speeds, and produce fabrics with the most flawless surface quality.