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Polyimide Tape Specifications
Ultra-thin grades, custom film thicknesses, narrow-width rolls and precision die-cut parts are available for space-limited electronic applications.
| Property | Specification |
|---|---|
| Product Model | PI2560 |
| Backing | Polyimide Film |
| Film Thickness | 25 ± 3 μm |
| Adhesive | Silicone |
| Adhesive Thickness | 35 ± 5 μm |
| Total Thickness | 60 ± 5 μm |
| Adhesion | 5.5 ± 0.5 N/25 mm |
| Tensile Strength | 115 N/25 mm |
| Elongation | 70% |
| Heat Resistance | 200°C* |
| Dielectric Strength | 3 kV |
| Standard Lengths | 33 m / 66 m / 100 m |
| Width | Custom slitting available |
| Formats | Rolls / Sheets / Die-Cut Parts |
| Color | Amber |
PI2560 is our standard grade. Actual heat performance depends on temperature, dwell time, adhesive system and process conditions. Higher-temperature grades should be confirmed separately before production use.
Why Choose Polyimide Tape?
Polyimide film combines thermal stability, electrical insulation and a thin profile for demanding PCB and electronic manufacturing processes.
Clean Masking & Removal
High-temperature silicone adhesive provides reliable edge sealing around pads and gold fingers while allowing clean removal after the validated heating cycle.
High Temperature Stability
Polyimide film maintains dimensional stability during wave soldering, reflow, selective soldering and other thermal processes where ordinary film tapes may shrink or curl.
Electrical Insulation
The thin polyimide backing provides dielectric insulation for PCB assemblies, coils, motors, battery components and other applications where insulation space is limited.
Polyimide Tape Applications
Polyimide tape is mainly used in electronic manufacturing and electrical insulation where thin, heat-resistant protection is required.
PCB Masking
Protect gold fingers, pads, connectors and keep-out areas during soldering and thermal processing.
Electrical Insulation
Wrap coils, motors, transformers and other electrical components where thin dielectric insulation is required.
Battery & Electronic Assembly
Insulate or temporarily secure battery tabs, modules and electronic components during assembly and heat processing.
FPC & Precision Components
Use for flexible circuits, modules and precision electronic assemblies where low thickness and thermal stability are important.
Polyimide Tape vs. Kapton® Tape
Polyimide tape is the general term for adhesive tape made with polyimide film, while Kapton® is a registered trademark of DuPont for its polyimide film.
Polyimide tapes can provide similar high-temperature masking and electrical insulation functions, but should not be described as genuine Kapton® tape unless DuPont Kapton® film is used.
| Feature | Polyimide Tape | Kapton® Tape |
|---|---|---|
| Material | Polyimide film | DuPont Kapton® polyimide film |
| High-Temperature Masking | Yes | Yes |
| Electrical Insulation | Yes | Yes |
| Custom Slitting / Die Cutting | Yes | Depends on converter |
| Brand | Generic product category | DuPont trademark |
Ultra-Thin Polyimide Tape for Electronics
Our 25 μm polyimide film provides high-temperature protection and electrical insulation with minimal added thickness. The standard PI2560 tape has an approximate total thickness of 60 μm, making it suitable for compact electronic assemblies where insulation space is limited.
Ultra-thin polyimide tape is commonly used for PCB masking, flexible circuits, battery components, coils, motors and precision electronic devices.
5 μm Polyimide Film
Thin insulation for compact electronic assemblies.
Approx. 60 μm Total Thickness
Provides heat protection without adding excessive bulk.
High Dielectric Strength
Suitable for electrical insulation and electronic components.
Custom Narrow Widths
Precision slitting and die-cut parts available for small components.
Polyimide Tape for PCB Masking
Polyimide tape provides thin, heat-stable masking around sensitive PCB areas during soldering and thermal processing. It is especially useful where precise edge definition and clean removal are required.
Gold Finger Masking
Protect gold fingers and edge connectors from solder, flux and contamination while maintaining a clean masking boundary.
Wave & Reflow Soldering
Mask selected PCB areas during wave soldering, reflow and other short high-temperature production cycles.
Selective Soldering
Protect nearby pads, connectors and components when only selected areas of the PCB are exposed to soldering.
Application Tips for PCB Masking
- Clean flux, oil and contamination from the surface before application.
- Apply polyimide tape with low tension to avoid lifting during heating.
- Press masking edges firmly around pads and gold fingers.
- Keep overlaps small and consistent where overlaps are required.
- Confirm peak temperature and dwell time before production.
- Allow the assembly to cool before peeling.
- Inspect masked areas for residue and edge definition after removal.
Quality Control & Storage
Quality Control
We control polyimide film thickness, adhesive coating, adhesion, slitting accuracy and finished roll dimensions to maintain consistent performance between production batches.
Storage
Store rolls in a clean, dry environment away from direct sunlight, excessive heat and high humidity. Keep unused tape sealed in its original packaging.
Handling
Avoid touching exposed adhesive surfaces and keep die-cut parts on their release liner until placement. For controlled electronic assembly, follow your normal ESD handling procedures where required.
How to Choose Polyimide Tape
Different PCB, insulation and assembly processes may require different film thicknesses, adhesive systems and tape formats.
| Application | Film / Total Thickness | Adhesive | Recommended Format | Why |
|---|---|---|---|---|
| Gold Finger Masking | 25 μm film / approx. 50–60 μm total | Silicone | 6–12 mm strips / die-cut frames | Thin profile and clean heat removal |
| Tight PCB Keep-Outs | 25–50 μm film | Silicone | 3–6 mm strips / precision die-cuts | Helps maintain precise masking edges |
| Battery & Insulation Wraps | 25–50 μm film | Silicone or Acrylic | 12–24 mm rolls / kiss-cut sheets | Select adhesive according to heat and holding requirements |
| Fixture & Abrasion Protection | 50 μm+ film | Silicone | 12–48 mm widths | Increased mechanical protection |
| ESD-Sensitive Areas | Grade-dependent | ESD-safe system | Rolls / die-cuts | Used where static control is required |
Final tape selection should consider peak temperature, dwell time, electrical requirements, substrate, removal method and production format.
Polyimide vs Green PET Tape
| Requirement | Polyimide Tape | Green PET Tape |
|---|---|---|
| Main Application | PCB & electrical insulation | Powder coating & surface finishing |
| PCB Masking | Excellent | Not primary choice |
| Gold Finger Masking | Excellent | Not primary choice |
| Electrical Insulation | Excellent | Limited |
| Wave / Reflow Processes | Preferred | Process-dependent |
| Powder Coating | Possible by grade | Preferred |
| Anodizing & Plating | Process-dependent | Preferred |
| Cost | Higher | More economical |
Custom Polyimide Tape Options
Custom Widths
Polyimide master rolls can be slit to narrow or wide dimensions for PCB, insulation and assembly requirements.
Adhesive Options
Silicone and selected acrylic adhesive systems are available according to heat resistance, initial tack and removal requirements.
Die-Cut Parts
Precision frames, discs, washers, tabs and custom shapes are available for repeat masking and insulation positions.
ESD-Safe Options
ESD-control grades can be supplied for applications where static-sensitive handling is required.
Samples and custom specifications are available for OEM and industrial production requirements.
Engineering Case: Polyimide Tape for PCB Gold Finger Masking
An electronics manufacturer required narrow polyimide tape to protect PCB gold fingers during wave soldering.
We supplied 25 μm polyimide film tape with high-temperature silicone adhesive, slit to the required narrow widths. Samples were checked for adhesion, dimensional accuracy and clean removal after the customer’s validated heating cycle.
The customized rolls reduced manual trimming and provided consistent masking around the PCB contact areas.
Solution supplied:
- 25 μm polyimide film
- Custom narrow widths
- Silicone adhesive
- PCB masking application
- Sample testing before production
Frequently Asked Questions
What is polyimide tape used for?
Polyimide tape is mainly used for PCB masking, wave soldering, reflow processes, electrical insulation, battery assembly, motors, coils and precision electronic components. Its thin polyimide film provides thermal stability and dielectric insulation in demanding production environments.
Is polyimide tape suitable for PCB masking?
Yes. Polyimide tape is widely used to mask gold fingers, pads, connectors and keep-out areas during soldering and other thermal processes. The thin film helps maintain precise masking edges while the adhesive is designed for clean removal after the validated heat cycle.
What temperature can polyimide tape withstand?
Our standard PI2560 grade is specified for use at 200°C under validated conditions. Actual performance depends on peak temperature, dwell time, adhesive system and substrate, so testing under your real production conditions is recommended.
What is the difference between silicone and acrylic adhesive polyimide tape?
Silicone adhesive is generally preferred for high-temperature masking and clean removal, while acrylic adhesive can provide different holding strength and long-term bonding characteristics. The correct adhesive depends on temperature, substrate and whether the tape is used temporarily or permanently.
What thickness is polyimide tape?
Our standard PI2560 uses a 25 ± 3 μm polyimide film with approximately 35 ± 5 μm of silicone adhesive, giving a total tape thickness of approximately 60 ± 5 μm. Other thicknesses can be supplied according to application requirements.
Is polyimide tape the same as Kapton tape?
Not exactly. Kapton is a DuPont trademark for a specific polyimide film, while polyimide tape is the broader product category. The term “Kapton tape” is commonly used in the market to describe high-temperature polyimide adhesive tapes.
Why is polyimide tape used for electrical insulation?
Polyimide film offers good dielectric performance while remaining thin and heat stable. This makes it suitable for insulating coils, motors, transformers, battery components and other electrical assemblies where space is limited.
Will polyimide tape leave residue after heating?
The silicone adhesive is designed for clean removal when used within the specified temperature and dwell-time range. Excessive heat exposure, contaminated surfaces or removal while the part is still hot may increase the risk of adhesive residue.
Can you supply custom-width polyimide tape?
Yes. Polyimide master rolls can be slit to custom widths according to PCB masking, insulation and assembly requirements. Standard and customized roll lengths are available.
Can you supply die-cut polyimide tape?
Yes. We can convert polyimide tape into custom frames, discs, washers, tabs and other precision die-cut shapes according to drawings or application requirements.
