A single piece of fabric that simultaneously offers firm compression, breathability, and targeted support—this used to require lamination or seaming. But KARL MAYER's latest RJ 4/2 EL lace machine is rewriting the rules.
In July 2026, the Obertshausen-based German machinery maker announced the newest member of its RASCHELTRONIC® family. The RJ 4/2 EL's core selling point is not higher output, but the ability to achieve 'body mapping' functional zoning in warp-knitted lace. Mills can now program different zones within the same fabric—varying elasticity, porosity, and mechanical support—without any post-weaving assembly.
Technical Leap: From Pattern to Performance
Traditional warp-knitting machines excel at patterns and openwork, but functional zoning has remained a challenge. KARL MAYER's new machine uses more flexible electronic shogging and guide bar control, allowing real-time adjustments to yarn lapping angles and stitch length during knitting. This translates directly to engineered garments: bra side panels need high stretch, the underbust needs firm support, and the back needs breathable mesh—the RJ 4/2 EL can define all these zones in a single pass.
Industry data shows the machine targets not only lingerie but also athleisure. Compression leggings require less friction and better heat dissipation at the back-of-knee, while the waist and hips demand higher compression pressure—exactly where body mapping technology adds value.
Industry Impact: A Differentiating Opportunity for Warp Knitters
For Chinese warp knitting clusters in Shaoxing (Zhejiang), Changle (Fujian), and Shantou (Guangdong), the RJ 4/2 EL means two things. First, the bar for high-performance functional fabrics has been raised. Competition used to focus on yarn raw materials and dyeing/finishing; now, it shifts to functional pre-configuration during the knitting stage. Second, the return-on-investment calculus for new machinery must be revisited. A machine capable of zone-knitting will carry a significantly higher price tag than conventional models, but the product premium is substantial—brands will pay more for a single piece of 'integrated' fabric because it eliminates downstream lamination and bonding costs.
From a supply chain perspective, this trend will also push upstream yarn suppliers to offer more differentiated products. High-stretch nylon, conductive yarns, and cooling polyester will see increased demand in zone-knitting applications.