Web-optimized roller profiles

Web-optimized roller profiles

Web-optimized roller profiles for ultra-thin separator films

Separator films are among the most sensitive functional layers in lithium-ion battery manufacturing. Their task: to electrically separate the anode and cathode while allowing ions to pass through. With increasing demands on energy density and miniaturization, these films are becoming thinner and thinner – in some cases less than 10 µm – and at the same time wider. Even the smallest deviations in web tension or local stress peaks can lead to cracks, web fluctuations, or rejects.
To meet these specific requirements, INOMETA develops web tension-optimized roller profiles that are specifically tailored for use in separator film production. The focus is on mechanical properties and functional surface technologies that enable gentle material handling with maximum web stability – even at high cycle rates and with the most sensitive substrates.

Get in touch with the INOMETA sales team today for comprehensive advice on roller and winding core solutions for battery and battery foil production and other innovative products from the renowned manufacturer based in Germany. Make your inquiry now.

Design features & advantages of web-optimised roller profiles

  • Minimized deflection thanks to optimized wall thicknesses and support structures
  • Surface finishes with targeted friction coefficients for tension-stable guidance of sensitive webs
  • Material combinations with low thermal expansion for constant geometries in the required temperature range
  • High-precision concentricity and dimensional stability even with large-format rollers
  • Special bearing and damping systems to minimize vibration at high web speeds
  • Optional integration of sensor technology – e.g., web tension, temperature, or vibration sensors

These design measures help to optimally support the tear resistance of ultra-thin separator films, compensate for tolerances in web travel, and expand the process windows for modern production facilities.

Roller solutions for sensitive separator films

To meet the special requirements of ultra-thin separator films, INOMETA develops web tension-optimized roller profiles that are specifically designed for mechanical precision and process-stable web guidance. The focus is on design, material behavior, and surface functionality – tailored to the sensitive structure of separators with a thickness of < 10 µm.
In addition, the rollers are specifically designed to ensure that even the slightest web tension can be reliably achieved. Thanks to reduced inertia, minimized starting torque, and very low breakaway torques, they enable highly sensitive, controlled web guidance – even with extremely thin and sensitive separator films.

Design features & innovations:

  • Roller body made of aluminium or fiber composite for even, structural load distribution
  • Material combinations with defined damping behavior, e.g., CFRP with PU coating for low-vibration guidance
  • Optimized geometries to reduce local stress peaks in roller contact
  • Specially coated surfaces for minimal friction and low-particle guidance
  • Seamless integration into existing sensor solutions for web tension monitoring with INOlogic® systems

Supplementary system solutions for rail-critical processes

In addition to these design advantages, INOMETA offers a comprehensive range of rolls for web tension-related applications in battery and film processing – from calendering to winding lines:

Heating rollers INOheat® with precise temperature control
Sensor rollers and INOlogic® for intelligent web tension control
• Roller solutions for drying, coating, and laminating
Smart rollers with integrated data acquisition
• Modular roller systems for retrofitting or plant conversion

WinCore® aluminium winding cores are used as supplementary system components. They are low-abrasion, manufactured with high precision and specially developed for the tension-stable winding and unwinding of sensitive substrates such as separator films – optionally with RFID technology, winding support or cut-resistant surface.
The result is an optimally coordinated overall system consisting of roller and sleeve, which combines mechanical precision, digital integration, and high process reliability for processing ultra-thin separator films.

Advantages for separator film production – at a glance:

  • Fewer film tears thanks to low-tension guidance
  • Stable processes even at high cycle rates and low film thicknesses
  • Improved web quality and reduced reject rates
  • Long-term stable roller performance thanks to targeted material pairings
  • Full compatibility with existing INOMETA systems and roller designs
  • Minimized risk of web distortion thanks to optimized geometries
  • Reduced particle contamination thanks to abrasion-free, smooth roller surfaces
  • Shorter setup and maintenance times thanks to standardized roller modules
  • Reduced downtime thanks to early integration into sensor-based monitoring systems (e.g., INOlogic®)
  • Constant web guidance even with temperature fluctuations thanks to material-appropriate designs
  • Process reliability with increasing miniaturization and film development
  • Reduced energy consumption thanks to reduced web tension and lightweight roller bodies

Systemic solutions for maximum process efficiency in battery manufacturing

The development of train-optimized roller profiles for ultra-thin separator films is a testament to INOMETA’s comprehensive expertise in battery and film manufacturing. Beyond this specific application, INOMETA offers an integrated portfolio of solutions that combines mechanical precision, innovative surfaces, and digital intelligence. From roll and winding technologies to PROTEK® roller coatings and digital solutions, INOMETA supports its customers in maximizing efficiency, quality, and process reliability along the entire production chain.

Contact our sales team today to learn more about INOMETA’s roller solutions for battery and battery foil manufacturing. Make an inquiry now.

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