Double-Sided Polyimide Tape

1. Product Overview

Nomay Double-Sided Polyimide Tape is a heat-resistant double-coated adhesive tape made with a polyimide film carrier and pressure-sensitive adhesive on both sides.

It is also known as Double-Coated PI Tape, High-Temperature Double-Sided Tape, PI Mounting Tape and PI Bonding Tape.

The tape is designed for FPCB and electronic-component mounting, high-temperature fixture positioning, battery insulation attachment, flexible-heater assembly, silicone-foam bonding, gasket mounting, heat-resistant film splicing and automotive sensor assembly.

Silicone and acrylic adhesive versions have different temperature, bonding, removal, contamination and surface-compatibility characteristics. The adhesive system must be confirmed before quotation.

2. Product Construction

• Carrier: Polyimide film

• Carrier Thickness: 0.025–0.075 mm

• Adhesive: Silicone or acrylic pressure-sensitive adhesive on both sides

• Adhesive Side: Double-sided

• Total Tape Thickness: Approximately 0.060–0.200 mm

• Common Total Thicknesses: 0.100, 0.130, 0.150 and 0.200 mm

• Color: Amber or golden PI carrier

• Release Liner: Single PET liner or double release-liner construction

• Product Form: Roll, liner-backed sheet or die-cut mounting part

• Width: 5–500 mm

• Roll Length: 10, 20, 33 or 50 m

The two sides may use the same adhesive or a specified A/B-side construction with different adhesion levels. Any A/B-side requirement must be defined before production.

Confirm whether the quoted thickness includes or excludes the release liner.

3. Carrier and Adhesive System

Polyimide Film Carrier

The PI carrier provides heat resistance, electrical insulation, dimensional stability and resistance to selected solvents.

It separates the two adhesive layers and helps control the dimensions of converted mounting parts during assembly and thermal processing.

Double-Sided Silicone Adhesive

Silicone adhesive is selected for higher-temperature mounting and bonding to silicone rubber, silicone foam or other difficult-to-bond surfaces.

Representative double-sided silicone PI constructions are commonly used from approximately -30 to 200°C. Selected models may withstand short exposure up to 260°C, subject to exact construction and process validation.

Because both sides contain adhesive, the total silicone content and potential silicone migration should be evaluated for sensitive electronics, optical, semiconductor, painting and bonding processes.

Double-Sided Acrylic Adhesive

Acrylic adhesive is selected for permanent mounting, higher room-temperature holding power and applications requiring a non-silicone adhesive system.

Representative acrylic constructions are commonly used from -40 to 155°C. Short-term performance should generally not be assumed above approximately 155–180°C without exact model data.

Complete silicone-free status must be confirmed for the adhesive, liner, release coating and converting process.

4. Key Features and Buyer Benefits

Two-Sided Fixation

Provides pressure-sensitive adhesion on both sides for mounting components, insulation films, foams, gaskets and heat-resistant materials.

Heat-Resistant PI Carrier

The PI film carrier supports dimensional stability and electrical separation during elevated-temperature assembly.

Adhesive-System Options

Silicone and acrylic versions allow the construction to be matched to temperature, bonding surface, permanent or temporary use and silicone-contamination requirements.

Silicone-Surface Bonding

Selected double-sided silicone constructions can bond silicone rubber, silicone foam and other difficult surfaces more effectively than standard acrylic systems.

Precision Die-Cutting

The liner-backed structure can be converted into mounting pads, frames, rings, gaskets and other assembly parts.

High-Temperature Film Splicing

Suitable constructions may be used for splicing PI film and other heat-resistant materials within the confirmed thermal range.

5. Applications

FPCB and Electronic-Component Mounting

Used to position FPCBs, components and carrier boards during reflow-related, wave-soldering or other assembly processes.

The application must define whether the tape is temporary or permanent and whether removal after heating is required.

Battery Insulation and Flexible Heaters

Used to mount flexible heaters, insulation films and selected components in battery and energy-storage assemblies.

Dielectric, flame, aging, adhesive and thermal-management requirements must be verified for the finished battery design.

Silicone Foam and Gasket Bonding

Double-sided silicone versions may be used to bond silicone foam, silicone rubber, heat-resistant gaskets and cushioning components.

Surface cleanliness, adhesive thickness, compression and long-term holding requirements must be tested.

High-Temperature Film Splicing

Used for joining PI film, insulation film and selected heat-resistant web materials during converting and manufacturing.

Splice tension, speed, temperature, surface energy and residue requirements must be confirmed.

Automotive Sensor and Insulation Assembly

Used for positioning sensors, insulation films and heat-resistant parts in automotive electronic assemblies.

Temperature cycling, vibration, humidity, fluids and long-term adhesion must be evaluated.

6. Industries

• Flexible Circuit Manufacturing

• PCB and EMS Manufacturing

• Semiconductor and Electronics Assembly

• Battery and Energy-Storage Systems

• Flexible-Heater Manufacturing

• Automotive Electronics

• Sensor Manufacturing

• Motor and Electrical Equipment

• Silicone Foam and Gasket Converting

• Film and Web Processing

• Industrial Insulation

• Precision Die-Cutting and Converting

7. Application Scenarios and Problems Solved

FPCB Fixture Mounting

Process: FPCB or component positioning on a carrier
Problem: Parts require stable two-sided fixation during thermal assembly
Tape Function: Double-sided PI tape bonds the FPCB and fixture while the PI carrier controls dimensions
Result: Helps maintain component position during the confirmed process
Confirm: Temporary or permanent use, temperature, surface, removal and residue

Battery Insulation Attachment

Process: Battery-module and insulation assembly
Problem: Insulation sheets or flexible heaters require thin heat-resistant attachment
Tape Function: Double-sided PI tape mounts the part while providing a PI carrier layer
Result: Helps integrate insulation and mounting into a thin construction
Confirm: Voltage, dielectric strength, flame requirement, aging, thickness and adhesive system

Silicone-Foam Bonding

Process: Silicone-foam gasket or cushioning assembly
Problem: Standard acrylic adhesive may not bond sufficiently to silicone surfaces
Tape Function: Double-sided silicone adhesive provides a compatible bonding option
Result: Helps mount silicone foam or rubber components
Confirm: Silicone grade, surface treatment, compression, temperature and holding force

Heat-Resistant Film Splicing

Process: PI film or high-temperature web conversion
Problem: Film ends require dimensional and thermal-stable joining
Tape Function: Double-sided PI tape forms a bonded splice between layers
Result: Helps maintain the splice during the confirmed converting process
Confirm: Web speed, tension, temperature, surface, splice thickness and residue

8. Technical Specifications

All specifications must be confirmed for the final carrier, adhesive coating, liner, total thickness and application conditions.

9. Performance and Operating Conditions

Temperature Performance

Double-sided silicone and acrylic constructions have different temperature ranges.

Selected silicone versions may support short exposure up to 260°C, but this must not be treated as the continuous temperature rating for every double-sided PI tape.

Acrylic versions normally operate within a lower temperature range.

Adhesion and Surface Compatibility

Side A and Side B may require different adhesion levels or different surface compatibility.

Bonding performance depends on the substrate, surface energy, cleanliness, pressure, dwell time, temperature and adhesive coating weight.

Removal and Residue

Double-sided structures contain more adhesive than comparable single-sided tapes. High-temperature residue and adhesive transfer must be evaluated on both bonded surfaces.

Temporary-removal performance must not be assumed unless the exact construction has been tested.

Electrical Performance

The PI carrier provides electrical separation, but the complete tape’s dielectric performance depends on the carrier, adhesive layers, thickness and test method.

Mechanical and Converting Performance

The PI carrier supports dimensional control during die-cutting and assembly. Liner stability, part dimensions, release force and A/B-side identification should be confirmed for converted parts.

10. Comparison and Selection Guide

Silicone vs. Acrylic Double-Sided PI Tape

Choose double-sided silicone adhesive when:

• The application involves higher temperature

• The bonding surface includes silicone rubber or silicone foam

• Temporary thermal mounting or removal may be required

• The process can accept a silicone adhesive system

Choose double-sided acrylic adhesive when:

• Permanent mounting is required

• Higher room-temperature holding power is important

• A non-silicone adhesive system is preferred

• The temperature remains within the confirmed acrylic range

Single-Liner vs. Double-Liner Construction

Choose a single-liner construction for standard roll processing and simpler application.

Choose a double-liner construction when both adhesive surfaces require separate protection, staged assembly or different release behavior.

11. Technical Notes and FAQ

Are both adhesive sides always identical?

Not necessarily. The tape may use the same adhesive on both sides or a specified A/B-side design with different adhesion levels.

Can the tape bond silicone rubber or silicone foam?

Selected silicone adhesive versions may be suitable, but the actual silicone grade, surface condition, compression and temperature must be tested.

Can every Double-Sided PI Tape withstand 260°C?

No. Up to 260°C applies only to selected silicone constructions and short exposure. Acrylic versions must not automatically use this rating.

Is high-temperature residue more important for double-sided tape?

Yes. Both bonded surfaces contain adhesive, so transfer and residue must be evaluated on each surface.

Does total thickness include the release liner?

This must be confirmed in the specification. Tape thickness and liner-inclusive thickness should not be mixed.

Is the acrylic version automatically silicone-free?

No. The adhesive may be non-silicone, but the release liner, release coating and converting process must also be checked.

Can the tape be supplied as die-cut mounting parts?

The tape may be supplied as rolls, pads, frames, rings, gaskets and other die-cut parts according to confirmed drawings, liners and tolerances.

Are UL, RoHS, REACH or halogen-free documents automatically included?

No. Regulatory, flammability and electrical requirements must be confirmed for the exact finished construction.

12. Send Your Application Requirements

For accurate selection and quotation, please provide:

• Application and industry

• Temporary or permanent bonding

• Silicone or acrylic adhesive preference

• Side A and Side B bonding surfaces

• Required Side A and Side B adhesion

• Continuous operating temperature

• Peak temperature and exposure time

• Required carrier and total thickness

• Required width and roll length

• Single or double release liner

• Roll or die-cut part requirement

• Removal and residue requirements

• Electrical or dielectric requirements

• Silicone-sensitive process requirements

• Quantity

• Drawing, tolerance, packaging and compliance requirements

Request a Quote for Double-Sided Polyimide Tape.