3M 1126 Copper Foil EMI Shielding Tape with Conductive Adhesive

Benefits

• EMI/RFI shielding: Helps reduce electromagnetic interference when correctly designed and installed.

• Electrical continuity: Conductive adhesive supports electrical contact between the copper backing and the substrate.

• Flexible application: Conforms to suitable surfaces and contours.

• Grounding and charge management: Suitable for static charge draining and selected grounding applications.

• Efficient converting: The release liner supports handling, slitting, and precision die-cutting.

• Solderable backing: Copper foil can support soldering operations when the process and application are appropriate.

Technical Specifications

Property	Typical specification
Product	3M™ Copper Foil Tape 1126
Backing material	Flat copper foil
Adhesive type	Electrically conductive acrylic
Backing thickness	0.036 mm (1.4 mil), nominal
Total tape thickness, excluding liner	0.066 ± 0.005 mm
Minimum adhesion to steel	2.7 N/cm
Minimum breaking strength	39 N/cm
Electrical resistance	Maximum 0.005 Ω/in² under the specified test method
Average shielding effectiveness	66 dB over 300 kHz–2.5 GHz, tested according to ASTM D4935
Flame-retardant classification	UL 510A, Category OARC2, File E17385
Temperature range	3M product information lists -40°C to 130°C
Electrical rating	600 V for dry applications, subject to applicable product guidance
Typical roll length	33 m (36 yd), depending on configuration
Liner	Removable release liner

Specifications are based on 3M product information and the June 2021 technical data sheet. Values are typical or test-method-specific, not guaranteed performance in every application. Confirm the current TDS and exact SKU before specifying or purchasing.

Applications

• EMI/RFI shielding in electronic equipment

• Shielding seams and joints in shielded rooms or enclosures

• Cable wrapping and selected cable-shielding applications

• Static charge draining

• Electrical contact to suitable non-solderable surfaces

• Electrical design, prototyping, testing, and troubleshooting

• Custom die-cut shielding components for electronic assemblies

• Selected grounding and electrical continuity applications

Compatible Materials

Compatibility and electrical performance should be validated for the actual substrate and application. Potential substrates include:

• Metal enclosures and panels

• Copper and other suitable conductive surfaces

• Selected plastics and insulating materials where conductive adhesive is needed to establish contact

• Cable jackets and shielding assemblies compatible with the adhesive

• Electronic housings and components with suitable surface conditions

Surface coatings, oxidation, contamination, roughness, and substrate chemistry can affect adhesion and electrical contact.

Industries

• Consumer electronics

• Telecommunications and networking

• Electrical and electronic equipment manufacturing

• Automotive electronics

• Industrial control systems

• Electrical testing and prototyping

• EMI/RFI shielding and enclosure fabrication

Why Choose 3M 1126 Copper Foil Tape?

3M 1126 combines a copper foil backing with electrically conductive acrylic adhesive, making it suitable for applications requiring both shielding and electrical contact through the adhesive layer.

For manufacturers requiring custom shapes or controlled dimensions, Yousan can evaluate requirements for tape slitting and precision die-cutting, subject to material availability and project specifications.

When selecting a copper shielding tape, consider the required conductivity, shielding frequency range, substrate, surface finish, temperature exposure, environmental conditions, and applicable compliance requirements.

Installation Guide

1. Check compatibility: Confirm that the tape is suitable for the substrate, electrical requirements, and operating environment.

2. Prepare the surface: Remove dust, oil, moisture, and other contaminants using a cleaning method compatible with the substrate.

3. Cut to size: Use the required roll width or a validated die-cut shape.

4. Apply the tape: Remove the liner and place the tape carefully, avoiding wrinkles, trapped air, and contamination of the adhesive.

5. Apply pressure: Press the tape firmly and evenly to promote contact with the surface.

6. Verify electrical performance: Test continuity, resistance, or shielding performance in the actual assembly when required.

7. Validate the completed assembly: Confirm that the installation meets the project’s electrical, mechanical, and environmental requirements.

Follow the latest 3M technical documentation and applicable workplace safety procedures.

Storage

• Store in a clean, dry, humidity-controlled environment.

• Recommended storage conditions: 10–27°C and below 75% relative humidity.

• Keep the tape in its original packaging until use.

• Protect it from direct sunlight, excessive heat, moisture, dust, and chemical contamination.

• 3M specifies a five-year shelf life from the date of manufacture when stored under the stated conditions. Confirm the manufacturing date and current product documentation.

FAQ

1. What is 3M 1126 copper foil tape used for?

It is used for EMI/RFI shielding, static charge draining, shielded-room seams, cable wrapping, and selected electrical contact applications.

2. Is the adhesive on 3M 1126 electrically conductive?

Yes. 3M 1126 uses electrically conductive acrylic pressure-sensitive adhesive, distinguishing it from 3M 1125, which uses non-conductive acrylic adhesive.

3. Can 3M 1126 be used for EMI shielding?

Yes. It is designed for EMI/RFI shielding applications. Actual shielding performance depends on frequency, installation quality, substrate, contact, and assembly design.

4. Can 3M 1126 be soldered?

The copper foil backing is solderable. Confirm the suitability of the specific soldering process and assembly requirements before production use.

5. Is 3M 1126 flame retardant?

The 3M technical data sheet identifies flame-retardant performance according to UL 510A, Category OARC2, File E17385. Verify current documentation for project-specific compliance.

6. What is the operating temperature range?

3M product information lists a range of -40°C to 130°C. Confirm the current documentation and consider the complete assembly, exposure duration, and application conditions.

7. Can 3M 1126 be die-cut into custom shapes?

Yes, it is suitable for die-cutting. Custom shapes, widths, and dimensions should be evaluated against the required tolerances and production conditions.

8. What is the difference between 3M 1125 and 3M 1126?

The key distinction is the adhesive: 3M 1125 uses non-conductive acrylic adhesive, while 3M 1126 uses electrically conductive acrylic adhesive. Select the product according to the required electrical path and shielding design.

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Downloads

Available upon request:

• 3M 1126 Copper Foil Tape Technical Data Sheet (TDS)
• Safety Data Sheet (SDS)
• Product Brochure
• Die-Cutting Capability Guide

Please contact our sales team if you require the latest technical documentation.