White Cloth TENS Electrode Pads

B2B contract manufacturing of white cloth TENS electrode pads for physical therapy and OTC electrotherapy. Features 65 g/m2 spunlace non-woven cloth, >40N wire pull-out retention, <20 Ohm-cm conductive hydrogel, and 30 to 50 reuse cycles.

White cloth TENS electrode pads serve as standard reusable biopotential interfaces for transcutaneous electrical nerve stimulation (TENS), electrical muscle stimulation (EMS), and interferential current (IFT) devices. Composed of an open-fiber spunlace non-woven backing, an isotropic conductive carbon film, a solid polyacrylate hydrogel, and a 2.0 mm female socket pigtail wire, these pads deliver electrical stimulation across cutaneous tissue for musculoskeletal pain relief, post-operative rehabilitation, and physical therapy.

Standard commercial white cloth electrodes routinely exhibit three failure modes in high-turnover clinical and home-care settings:

• Leadwire Pull-Out and Terminal Fractures: Users frequently detach electrode pads from the skin by tugging directly on the leadwire rather than gripping the edge of the cloth backing. In low-cost assemblies where copper strands are simply crimped or glued without mechanical strain relief, tensile pull forces shear the wire away from the conductive carbon substrate, breaking the circuit.
• Edge Lifting on Articulating Joints: Rigid substrates fail to conform to high-curvature body contours. When applied to knees, elbows, or cervical curves, dynamic joint movement applies shear tension across the backing. Inferior non-woven fabrics with single-direction fiber lay buckle and peel at the perimeter, reducing effective skin contact and concentrating current onto shrinking surface patches.
• Current Crowding and Entry-Point Stinging: When the carbon film exhibits uneven surface resistivity, electrical current dumps at the point where the copper leadwire contacts the carbon layer rather than spreading across the entire pad. This creates localized current bottlenecks where current density exceeds 2.0 mA/cm2, generating sharp burning sensations beneath the wire junction.

This white cloth electrode platform utilizes a 65 g/m2 multi-directional spunlace non-woven carrier laminated to a low-resistance conductive carbon polyethylene substrate. The leadwire termination incorporates an expanded, fan-splayed copper crimp secured by a reinforced mechanical anchor patch, holding axial pull forces beyond 40N. The contact interface features a biocompatible, high-chloride polyacrylate solid hydrogel maintaining peel adhesion and electrical conductivity across 30 to 50 application cycles. We contract-manufacture standard square, rectangular, and round profiles for physical therapy distributors, DME/HME suppliers, and electrotherapy device OEMs globally.

The industrial manufacture of white cloth TENS electrode pads is conducted inside ISO 13485-certified Class 8 cleanrooms utilizing multi-station rotary die-cutting and automated wire-bonding lines. The cross-section integrates five functional material layers:

1. Outer Carrier Backing: A 65 g/m2 spunlace non-woven fabric manufactured from a 70:30 polyester (PET) and viscose blend. The hydro-entanglement process interlocks fibers in a multi-directional mesh, providing balanced tensile strength and multi-axis elongation (machine direction elongation 20% to 30%, cross direction elongation 40% to 55%). This elasticity allows the fabric to stretch and recover with skin movement without buckling.
2. Intermediate Carrier Adhesive: A medical-grade pure acrylic pressure-sensitive adhesive coating applied at 35 to 45 g/m2, bonding the spunlace cloth permanently to the underlying conductive film without blocking the breathability of the outer fabric.
3. Conductive Carbon Conductor: A 45 um thick carbon-loaded low-density polyethylene (PE) film. Conductive furnace carbon black is compounded uniformly into the resin matrix, delivering isotropic surface sheet resistance held strictly between 30 and 50 Ohm/sq across the entire web.
4. Leadwire Anchor Assembly: A multi-strand flexible tinned-copper wire harness encased in medical PVC insulation. The stripped copper core is splayed into a fan pattern and anchored to the conductive carbon film via conductive pressure-sensitive adhesive transfer tape. A reinforced, non-conductive polyester barrier tab is laminated directly over the copper junction, clamping the wire termination against axial shear loads. The opposite end is molded into a flame-retardant 2.0 mm female safety socket compatible with standard clinical stimulator pin leads.
5. Conductive Solid Hydrogel: A slot-die coated, ultraviolet-polymerized crosslinked polyacrylate solid hydrogel (thickness 0.85 mm to 1.00 mm). Compounded with pharmaceutical-grade glycerol, purified water, and sodium chloride electrolyte salts, the hydrogel maintains an equilibrium water activity that suppresses evaporation during ambient storage while delivering volume resistivity below 20 Ohm-cm.

The assembly is slit and die-cut using continuous rotary tooling with hardened tungsten steel dies. Die margins feature 3.0 mm radius corners to prevent corner-peeling during wear. Electrodes are mounted in pairs onto siliconized release liners and sealed in nitrogen-flushed multi-layer PET/AL/PE barrier pouches featuring reclosable zip-lock tops. The standard minimum OEM contract production run is 10,000 pouches (40,000 individual electrode pads).

• Multidirectional Hydro-Entangled Spunlace Matrix (Joint Articulation Compliance Without Edge Lifting) 

  During ambulatory electrotherapy, active movement of joints such as the knee, shoulder, or elbow generates dynamic tensile strain across the skin surface. Conventional foam-backed electrodes possess low elastic recovery; when the joint flexes, the non-elastic carrier buckles, forcing the outer perimeter to peel away from the skin. Our platform uses a 65 g/m2 hydro-entangled spunlace non-woven backing with a randomized, multi-directional fiber orientation. The material delivers balanced elongation under dynamic loads, allowing the cloth backing to stretch and retract with skin movement without buckling. Concurrently, the fibrous matrix maintains high moisture vapor permeability, allowing insensible sweat to evaporate rather than pooling beneath the adhesive layer. The electrode maintains continuous surface contact across 60-minute joint mobilization sessions, eliminating edge lift and preventing current crowding caused by peeling borders. 

   

• Multi-Point Anchored Conductive Carbon Wire Bond (40N Axial Pull Retention Preventing Leadwire Separation) 

  Leadwire pull-out represents the most common mechanical breakdown in reusable TENS electrodes, occurring when patients peel pads off by pulling on the pigtail wire rather than lifting the edge tab. In conventional electrodes, the copper wire is fastened with a simple metal crimp or spot-glued, creating a single stress concentration point that tears under forces as low as 15N. We resolve this by splaying the multi-strand tinned copper conductor into a broad fan-shaped pattern across the conductive carbon film. The splayed strands are laminated beneath a layer of isotropic conductive pressure-sensitive adhesive and capped with a high-tensile polyester reinforcement tab. When an axial tensile force is applied to the wire, the mechanical stress distributes across the entire adhesive area rather than concentrating at a single crimp point. In calibrated pull-force tests, the joint withstands axial pulling forces exceeding 40N without wire detachment, internal tear, or electrical resistance increase. 

   

• Balanced Isotropic Carbon-Film Sheet Resistance (Uniform Current Distribution Suppressing Peripheral Pinch Stinging) 

  In electrotherapy applications delivering currents up to 80 mA, standard carbon-loaded films with poor dispersion exhibit localized resistance variations. Electrical current takes the path of least resistance, discharging heavily around the copper leadwire entry point rather than spreading across the periphery of the pad. This localized current dump spikes current density beyond 2.0 mA/cm2, causing sharp stinging sensations beneath the wire entry point even at low intensity settings. Our carbon-loaded polyethylene substrate undergoes continuous melt-blending with conductive furnace black, controlling surface sheet resistance within a 30 to 50 Ohm/sq band across the entire surface. When pulse energy enters via the copper conductor, the isotropic resistance of the carbon layer distributes charge evenly in all planar directions before it passes into the hydrogel layer. Current density remains uniform across the active area, eliminating hotspots and allowing users to advance to therapeutic stimulation levels without localized burning sensations.

• Dies, Lead Formats, Foil Pouching & Master Kitting : We offer full-scope contract manufacturing across standardized and custom configurations:

  · Dimensions: 50x50 mm square (most popular global standard), 50x90 mm rectangular, 40x40 mm compact, and 50 mm circular pads.

  · Leadwire Customization: Standard 10 cm to 15 cm pigtail leads with molded 2.0 mm female safety sockets (translucent, white, or black PVC/TPE); custom leadwire lengths available upon request; optional 3.5 mm or 4.0 mm snap stud hardware.

  · Release Liners & Packaging: Transparent PET or red/blue gridded polypropylene liners; packed 2, 4, or 40 pads per resealable PET/AL/PE multi-layer barrier foil pouch. Pouches support full-color gravure printing, client private-label logos, and compliant UDI barcodes. 

   

• Two-Center Supply Chain Mechanics : High-volume raw hydrogel chemical synthesis, conductive carbon PE film continuous extrusion, spunlace fabric adhesive coating, and primary automated leadwire staking execute natively inside our primary China facility. Multi-station rotary die-cutting, optical camera inspection, foil pouch hermetic sealing, final cleanroom cartoning, and container palletization route through our Vietnam hub, shielding international B2B buyers from regional medical consumable tariffs and Section 301 duties.

• ISO 10993 Dermal Biocompatibility Rigor : Master production lots undergo testing in accredited independent testing laboratories confirming strict compliance with ISO 10993-5 (In Vitro Cytotoxicity Grade 0/1), ISO 10993-10 (Skin Sensitization: 0% allergic response), and ISO 10993-23 (Primary Dermal Irritation Index = 0.0). The pads are certified 100% natural rubber latex-free, non-cytotoxic, and non-irritating over multi-day repeated application protocols.

   

• Electrical Safety & Mechanical Compliance : Product lines satisfy FDA 21 CFR 882.1320 requirements for cutaneous electrodes and IEC 60601-1 Type BF electrical safety standards. Routine lot sampling confirms 2.0 mm socket insertion/retention force remains between 5N and 15N after 50 connection cycles, and leadwire pull resistance consistently exceeds 40N.

   

• MDSAP & ISO 13485 Manufacturing System Controls : Continuous coating lines, rotary die-cutting bays, and pouch packaging operations run strictly under certified ISO 13485:2016 and MDSAP regulatory frameworks (covering US FDA 21 CFR 820, Health Canada, TGA Australia). Unbroken electronic Device History Records (DHR) capture raw non-woven tensile values, carbon film surface resistivity, hydrogel coat weights, and leadwire tensile pull-force data for full lot traceability.

Physical therapy equipment distributors, DME resupply managers, and private-label electrotherapy brand operators can request official Certificates of Analysis (COA), tensile pull-test verification logs, ISO 10993 biocompatibility dossiers, and unbranded 4-pad evaluation foil packs (50x50 mm square or 50x90 mm rectangular). 

👉 [Request White Cloth TENS Electrode Evaluation Packs]

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