Rectangular TENS Electrodes

B2B rectangular TENS electrodes (50x100mm / 2x4 inch) for paraspinal and thigh muscle stimulation. Engineered with branched silver-carbon busbars to equalize voltage across the long axis.

These rectangular TENS electrodes (standard 50x100mm / 2x4 inch format) function as specialized, long-format transdermal consumable interfaces engineered for elongated muscle structures, such as the erector spinae, quadriceps, hamstrings, and gastrocnemius. Applying transcutaneous stimulation over extended linear paths presents a specific electrical engineering failure mode: passing current through a 100mm carbon substrate creates linear voltage attenuation, causing electrons to bottleneck directly beneath the central wire terminal, generating painful thermal hotspots while leaving the outer pad margins under-stimulated. Our rectangular pads integrate a branched conductive silver-ink busbar network to balance electrical flux across the entire long axis. We mass-produce these high-turnover blanks for medical equipment GPOs, durable medical equipment (DME) stockists, and e-commerce private-label brands.

The industrial fabrication of rectangular 50x100mm electrodes passes a spunlace non-woven or flexible PU film web through multi-stage flexographic printing, slot-die hydrogel extrusion, and high-speed rotary die-cutting lines. When delivering higher milliampere (mA) current required to penetrate large muscle bellies, standard thin carbon traces experience exponential resistance accumulation over 100mm. To force uniform charge distribution without creating a hot center point, our converting line screen-prints a primary carbon layer overlaid with a branched, highly conductive silver-ink busbar grid. This internal silver circuit acts as an electrical distribution funnel, driving electrons horizontally to the extreme margins of the 100mm span before they pass vertically through the Z-axis hydrogel. Standard unprinted transparent bags: 4 per pack, minimum order of 5,000 packs Printed , PE bags: 4 per pack, minimum order of 20,000 packs. 

• Branched Silver-Carbon Busbar Architecture (Center Hotspot Erasure)

  Un-compensated rectangular 50x100mm electrodes funnel electrical current directly beneath the central wire or snap terminal. This voltage bottleneck transforms the terminal root into a localized heater, causing severe skin stinging and burns during high-output pain gating or muscle stimulation protocols. We eliminate this current tunneling hazard by printing a branched, resistance-compensated silver-carbon conductive pattern. The physical layout forces electrons to disperse laterally to the outer 100mm margins before crossing the skin barrier, creating a mathematically uniform current density field (mA/cm²) that allows safe high-mA stimulation.

   

• Long-Axis Muscle Fiber Alignment (Zero-Lifting Shear Distribution)

  Applying a square pad over long, linear muscle groups (such as the quadriceps or paraspinals) forces therapists to use multiple smaller pads, creating complex wiring setups and boundary gaps. A single 50x100mm rectangular pad aligns naturally with the directional contraction of long muscle fibers. The flexible spunlace non-woven backing absorbs the longitudinal kinetic tension when the muscle flexes, preventing edge curling and preserving a stable 5.0N–7.0N peel anchor throughout active therapy sessions.

   

• High-Cohesion Polyacrylamide Lattice (Zero-Residue Dermal Release) 

  During prolonged electrical stimulation sessions, body heat (37°C) and localized perspiration can break down low-grade hydrogels, leaving sticky residue on the patient's skin and carbon film. We formulate our skin-facing gel with an elevated covalent cross-linking density and a balanced storage modulus (G'). The crystalline polymer lattice retains its water molecules and structural memory under dynamic movement, releasing cleanly from human skin post-treatment without skin-stripping or leaving film residue.

• Zero-MVTR Barrier Pouching : Large 50x100mm hydrogel pads require precise moisture retention to maintain edge seal and impedance values. We package completed pads on automated horizontal flow-wrappers into heavy PET/AL/PE foil pouches with 8mm solid heat-seals. This technical barrier drives the Moisture Vapor Transmission Rate (MVTR) near zero, preventing hydrogel crystallization and guaranteeing a 24-month shelf life. 

• Supply Chain Resilience Routing : Polymer synthesis, carbon ink screen-printing, and continuous web lamination run inside our primary China facility. Precision rectangular die-cutting, terminal pigtail/snap crimping, and automated pouching execute at our Vietnam hub, providing supply chain redundancy and protecting international distributors from regional import trade tariffs.

• ISO 10993 Dermal Safety Validation : Finished multi-layer laminates (spunlace backing, conductive carbon trace, and active hydrogel) undergo continuous batch testing against strict ISO 10993-5 (Cytotoxicity Grade 0) and ISO 10993-10 (Primary Dermal Irritation Index <0.1) boundaries to eliminate skin allergy and redness risks. 

• MDSAP & ISO 13485 Systems : Manufacturing and cleanroom converting bays function securely under ISO 13485:2016 and MDSAP regulatory frameworks, delivering unbroken lot-serialization from raw monomer synthesis to final shipping cartons.

DME procurement networks, medical equipment brand owners, and GPO distributors can request long-axis potential distribution mapping, dynamic adhesion test logs, and unbranded 50x100mm evaluation samples. 

👉 [Request 50x100mm Rectangular Pad Samples]

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