Elastic fabrics have moved beyond simple stretch functionality. As sportswear brands and intimate apparel manufacturers pursue precise zonal designs that require support in some areas and breathability in others, the digital capability of warp knitting equipment has become a competitive differentiator.
In July 2026, KARL MAYER officially launched the RJ 4/2 EL, the latest addition to its RASCHELTRONIC® series. The core breakthrough of this machine is its ability to electronically control each individual yarn, enabling complex jacquard patterns that were previously difficult to achieve in warp knitting.
Technical Logic and Industrial Application
Traditional warp knitting machines are limited by mechanical structures. Changing patterns often requires stopping the machine to replace guide bars or adjust mechanical chains. The RJ 4/2 EL employs electronic shogging and electronic let-off systems, reducing pattern change time from hours to minutes.
More critically, the machine is optimized for body-mapping design. In smart lingerie applications, the same fabric can achieve: high-stretch support in the bust area, stable wrapping in the side panels, and breathable wicking in the back—all integrated during the knitting process, eliminating the need for subsequent lamination or stitching.
For athleisure categories, this technology allows brands to integrate mesh ventilation, elastic support bands, and gradient jacquard textures into a single fabric roll, significantly reducing cutting and sewing steps in garment manufacturing. From a supply chain perspective, this directly lowers production complexity and defect rates.
Practical Value for Warp Knitting Mills
ROI is the key decision factor for factories. The RJ 4/2 EL is positioned not as a disruptive replacement but as a functional extension of existing RASCHELTRONIC® lines. Mills already using this series can upgrade via software and process parameter adjustments to take on higher-value orders without extensive hardware modifications.
From a market perspective, high-end sportswear and yoga apparel brands are accelerating their shift toward seamless, one-piece designs. Circular knitting machines face a ceiling in elastic fabric jacquard precision, while warp knitting machines fill this gap with higher density and better yarn control. For mills with warp knitting capacity, this is a window to enter high-margin niche segments.
Upstream and Downstream Effects
This upgrade will ripple upstream. Yarn suppliers need to reassess product suitability—fine-denier nylon, high-stretch spandex core-spun yarns, and functional filaments will be evaluated based on performance and stability under independent yarn control conditions.
Simultaneously, brand design teams face a skills upgrade. In the past, warp knitting jacquard designs were limited by mechanical pattern wheel repeats. Now, electronic control removes these limits, allowing designers to convert ergonomic data (such as pressure distribution maps) directly into knitting parameters. This means data-driven fabric design is moving from concept to mass production.