EMC shielding film slitting

Materials we slit

EMC shielding requires different materials depending on frequency range, mechanical stress, and installation conditions. As an experienced contract slitter for conductive foils, we process a wide range of shielding materials on our longitudinal slitting machines:

Copper foil

Copper foil is the standard material for EMC shielding. We slit copper foil in thicknesses from 6 micrometers to 200 micrometers, both bare copper foil and variants with conductive adhesive. The high electrical conductivity of copper makes this material ideal for shielding low-frequency and high-frequency interference. When slitting copper foil through contract slitting, we pay particular attention to burr-free cut edges, as even the smallest deformations can impair contact and thus shielding effectiveness.

Aluminum shielding foil

Aluminum shielding foil offers a cost-effective alternative to copper, especially for large-area shielding. We process both pure aluminum foils and laminated variants with plastic backing (e.g., PET-aluminum composite foil), as used in cable jackets and housing linings.

Nickel shielding tape

Nickel tape and nickel foil are excellent for applications requiring magnetic shielding in addition to electromagnetic shielding. We slit nickel shielding tape precisely to the desired width, ideal for use in connectors, gaskets, and housing contacts.

Mu-metal foil

Mu-metal offers the highest magnetic permeability and is used where low-frequency magnetic fields must be shielded, such as in medical technology or with sensitive measuring instruments. Slitting mu-metal foil requires special care, as mechanical stresses can alter the magnetic properties. Our slitting processes are designed to minimize this stress.

Conductive fabric tapes

Woven and knitted shielding tapes made from silver-plated or nickel-plated fabric offer flexible EMC shielding for irregular contours. We slit these textile shielding materials cleanly to width without separating or fraying the fabric.

Copper-nickel composite foils

Multi-layer composite foils of copper and nickel combine the advantages of both metals: high electrical conductivity and good magnetic shielding. These specialty foils are used in particularly demanding EMC environments. We convert copper-nickel composite foils in the widths you require.

Tin-coated copper foil

Tin-plated copper foil combines the excellent conductivity of copper with the corrosion protection of the tin layer. This material is preferred in environments with elevated humidity or aggressive media. During slitting, we take care not to damage the tin coating.

EMC gasket tapes and conductive foams

Conductive foams and EMC gasket tapes are used for sealing housing joints and door openings. These combined materials provide both shielding effectiveness and mechanical sealing function. We slit self-adhesive EMC gasket tapes and conductive foams precisely to your desired width.

Technical capabilities for EMC shielding film slitting

Slitting EMC shielding foils and conductive materials places special demands on machines and processes. Thin copper foils from 6 micrometers are extremely sensitive to tensile stress and mechanical loading. Even a slight burr on the cut edge can lead to short circuits during later processing or reduce shielding effectiveness.

Our longitudinal slitting machines are designed for exactly these challenges. Through the combination of precise circular blades, optimized web guiding, and controlled winding tension, we achieve clean, burr-free cuts even with ultra-thin conductive foils.

Our technical specifications

With our core variants from 25 mm to 152 mm, we can precisely match the winding to your downstream processing machine. The tolerance of +/- 0.1 mm ensures that EMC shielding tape and copper foil fit precisely into your housing, gaskets, or cable jackets.

Whether you want to have a conductive foil slit or need an EMC copper tape converted: our machines process both pure metal foils and laminated composite materials, self-adhesive shielding tapes, and conductive textiles reliably and reproducibly.

Application examples: where precision-slit EMC shielding film is used

EMC shielding is a fundamental requirement of modern electronics. Increasing frequency density from 5G, the electrification of transport, and ever-stricter EMC standards (EU Directive 2014/30/EU) are driving demand for precisely slit shielding materials.

5G base stations and telecommunications

5G base stations operate at frequencies up to the millimeter wave range. Housing shielding must be seamless to avoid self-interference and comply with legal limits. Copper foil and copper-nickel composite foil are used as shielding linings and gasket tape in transmitter housings. GOBA delivers these materials in exact widths, from narrow shielding strips starting at 5 mm to wide webs for large-area housing shielding.

Electromobility and battery shielding

In electric vehicles, power electronics, inverters, and electric motors generate strong electromagnetic fields. At the same time, sensitive control units and communication systems must operate without interference. EMC shielding foils made of copper and aluminum are installed in battery modules, cable harnesses, and control unit housings. Dimensional accuracy requirements are high, as installation spaces in the vehicle are tightly constrained.

Medical technology: MRI, ECG, and diagnostic devices

Medical devices are particularly sensitive to electromagnetic interference. MRI rooms are completely lined with copper foil to block external interference fields. ECG devices and other diagnostic systems require shielded housings and cable jackets. GOBA slits copper foil and mu-metal foil for medical technology applications where the highest precision and cleanliness are demanded.

Control cabinets and electronics enclosures

Industrial control cabinets and electronics enclosures require effective EMC gaskets at all joints, doors, and cable entries. Conductive gasket tapes and shielding strips ensure continuous shielding. We convert these materials to exact dimensions, including self-adhesive variants that can be easily applied during assembly.