The warp knitting machinery sector has received a targeted upgrade for body-mapping fabric development. German textile machinery manufacturer KARL MAYER has added the RJ 4/2 EL model to its RASCHELTRONIC® series. This new machine is not a simple line extension; it is directly aimed at the intersection of smart lingerie and sporty athleisure fabrics.
The industry background for this technological move is that consumer demand for intimate apparel is shifting from simple comfort to zonal functionality. For example, a sports bra needs to provide support, breathability, and moisture wicking simultaneously, but traditional weaving processes often struggle to switch these properties flexibly within a single piece of fabric.
Technical Breakthrough and Industrial Application
The core capability of the RJ 4/2 EL lies in the synergy between its electronic shogging and jacquard systems. According to publicly available technical data, the machine can form different fabric structures in a single knitting process on the same piece of fabric. This means different areas of the fabric can have completely different physical properties without needing subsequent stitching or lamination.
For warp knitting mills, this change implies a simplification of the product development process. Previously, achieving zonal functionality often required multiple steps or reliance on finishing technologies; now, a single machine can accomplish the core steps from design to fabric formation. KARL MAYER positions this model as a 'creative product development tool,' suggesting its target customers are not mass grey fabric producers but brand OEMs and R&D-oriented knitting companies with high demands for differentiation.
From a supply chain perspective, the most direct impact of this technological breakthrough is shortening the time from design concept to mass-producible fabric. For fast fashion and sportswear brands, this could compress the development cycle for new lingerie or sportswear by several weeks, enabling faster response to market trends.
Market Logic of Body-Mapping Fabrics
Body Mapping is not a new concept, but its large-scale commercialization in the knitting sector has long faced equipment bottlenecks. Previously, achieving similar effects relied on the partial knitting functions of circular knitting machines or sock machines. In the warp knitting domain, especially for elastic mesh fabrics and lace products, there has been a lack of efficient solutions for zonal design.
KARL MAYER's timing for launching the RJ 4/2 EL is backed by the sustained growth of the athleisure market. According to publicly available industry data, the global sports bra market exceeded USD 20 billion in 2025, with an annual growth rate of over 8%. Concurrently, the penetration of wearable technology into intimate apparel is accelerating, increasing the demand for fabrics that can embed sensors or conductive yarns.
The technical specifications of the new model show its gauge range covers common specifications from lightweight lace to medium-thickness elastic fabrics. This means it can be used for delicate pattern designs in high-end women's lingerie as well as functional fabric development for sportswear like yoga pants and compression garments.
Ripple Effects Upstream and Downstream
Upgrades at the equipment end often lead to a reshuffle at the raw material end. The RJ 4/2 EL's enhanced adaptability to different yarn types will indirectly promote the application of differentiated yarns—such as fine-denier covered spandex, conductive yarns, and cooling yarns—in the warp knitting sector. For chemical fiber producers, this means adjusting product portfolios to favor high-value-added, small-batch customized yarns.
On the other hand, for warp knitting OEM factories, adopting such a model signifies a potential shift from billing 'per meter' to billing 'per functional design.' The return on investment for a machine capable of complex zonal knitting will depend more on the factory's design service capabilities than on pure knitting speed.