ECG Hydrogel Roll

B2B master rolls of reinforced conductive hydrogel for diagnostic ECG electrodes. Features an internal non-woven scaffold, precise 0.85mm thickness, and ≤ 2K Ω impedance for stable signal acquisition.

This bulk master roll serves as the primary raw material for Tier 1 medical device converters assembling routine diagnostic and monitoring ECG electrodes. This specific formulation is a highly cross-linked, water-based conductive polymer integrated with an internal non-woven scaffold. The scaffold drastically increases the substrate's tensile strength during high-speed rotary die-cutting and prolonged patient wear. It functions as a stable, low-impedance bridge between the epidermis and the Ag/AgCl sensor. We supply these continuous web rolls directly to global converting facilities requiring strict batch traceability.

The substrate is formed via a continuous, multi-stage coating process. A transparent, odorless liquid precursor-a controlled blend of acrylic acid monomers and chloride electrolytes-is metered through a slot-die head onto a 0.125mm PET release liner. During the coating phase, a fine non-woven fabric mesh is embedded directly into the liquid matrix. The web then passes through a curing tunnel, forcing the monomers to cross-link and lock the internal scaffold into a cohesive, 0.85mm thick solid hydrogel lattice. A 0.05mm PE protective film is applied to the top surface before winding into 100-meter master rolls. This process yields a high-tack, single-use adhesive optimized for routine electrotherapy and patient monitoring.MOQ: 1 roll (100 metres per roll)

• Internal Scaffold Tensile Reinforcement

  Standard solid hydrogels without structural backing are prone to stretching, tearing, or necking when pulled under tension during the die-cutting process or when the finished pad is peeled from a patient's skin. This formulation integrates a micro-porous non-woven fabric directly inside the gel thickness. This internal scaffold arrests multi-directional shear forces. It physically prevents the hydrogel from breaking apart (delaminating) when removed, leaving zero sticky residue on the patient while maintaining the required 0.85mm Z-axis density.

   

• Low-Impedance Micro-Volt Acquisition

  Routine ECG monitors read cardiac electrical activity in the micro-volt (µV) range. A dense gel matrix without proper ionization acts as an insulator, blocking the signal and causing baseline wander. The liquid precursors in this matrix are chemically titrated with specific chloride salts and vacuum-degassed before curing. Tested under strict parameters (φ 15mm sample, 10Hz, 1V), this continuous ionic path forces the baseline AC impedance strictly below 2KΩ. This ensures an unbroken, artifact-free signal transfer from the stratum corneum to the metallic sensor.

   

• Differential Release Web Processing

  Converters running high-speed automatic assembly lines face constant jams if the hydrogel does not cleanly separate from its carrier films. This master roll is engineered with a strict release-force hierarchy. The bottom 0.125mm PET base liner (250mm wide) features a heavier release tension than the top 0.05mm PE protective film (245mm wide). During unwinding, the top PE film peels away effortlessly, exposing the active gel matrix for carbon or sensor lamination, while the gel remains firmly anchored to the PET base until the final die-cut station.

• High-Barrier Sealing: The hydrogel's 24-month shelf life relies on preventing moisture evaporation. The 100-meter rolls are double-sealed in heavy-gauge AL/PE (Aluminum/Polyethylene) light-blocking bags and suspended on core-plugs within rigid export cartons to prevent crush damage to the gel's 0.85mm thickness during transit.

• Global Routing : Bulk compounding and UV curing lines execute exclusively in our China facilities. Container loads are palletized and routed directly to major medical device hubs across North America, Europe, and Southeast Asia

• Systems : Roll-to-roll continuous coating lines operate strictly within audited ISO 13485:2016 frameworks, ensuring full batch traceability for chemical formulations.

• Biocompatibility: Material evaluations for the core polymer matrix are conducted in accordance with ISO 10993-5 (Cytotoxicity) and ISO 10993-10 (Sensitization) limits.

Tier 1 medical device converters and diagnostic hardware OEMs can request physical 10-meter test rolls and impedance stability reports to calibrate assembly lines. 

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