The company claims that its proprietary polymer design and spinning technology enable the yarn to deliver “excellent elasticity” and stretch recovery, which could allow manufacturers to create “all-polyester fabrics” that are compatible with high-performance polyester materials.
The new yarn is positioned as an alternative to traditional polyurethane-based elastic fibres, which are widely used to provide stretch in sportswear and everyday clothing.
Unlike polyurethane, the newly developed polyester yarn offers compatibility with existing polyester materials, addressing a longstanding material challenge in textile manufacturing related to differing heat-setting characteristics. This has previously posed limits to product development when blending elastic and polyester fibres.
Teijin Frontier says the new polyester filament maintains the advanced functions of high-performance polyesters, such as moisture absorption, quick drying, and durable water repellence.
“The strong compatibility between the new stretch polyester yarn and high-performance polyester materials makes it possible to develop 100% polyester textiles that maintain the advanced functions of the polyester material,” the company says.
Teijin Frontier emphasises that, because all components are polyester, the resulting textiles are more readily recyclable compared to polyester-polyurethane blends.
The yarn’s elasticity results from the polymer design and spinning process, rather than from structural manipulations such as combining different heat-shrinkage polymers or using highly crimped yarns.
This approach reportedly achieves a form of stretchability and recovery that the company describes as comparable to polyurethane-based fibres.
Teijin Frontier outlines that the yarn’s properties, which include excellent heat-setting characteristics, allow for the development of new high-performance stretch textiles for a variety of apparel types.
“Using the new polyester stretch yarn with high-performance polyester materials will create a 100% polyester textile, making easier recycling possible,” states Teijin Frontier.
The manufacturer plans to integrate the new yarn into sportswear, casual wear, and innerwear. It expects domestic and overseas sales of these textiles to commence in 2027, with targeted sales volumes set at 100,000 metres of textiles in the initial year and 500,000 metres in fiscal 2029.
Earlier this year, Teijin Frontier developed a multi-functional textile for sports and outdoor apparel, building on its focus on performance clothing materials.
