What Is Double-Sided Polyimide Tape? Applications, Benefits, and Buying Guide
What Is Double-Sided Polyimide Tape
Double-sided polyimide tape consists of a polyimide film base coated with silicone adhesive on both sides. One or both sides are covered with a fluorine release film to protect the adhesive surfaces and ensure clean, trouble-free handling prior to application. This tape is amber-colored and specifically designed for harsh environments where standard tapes fail. This tape combines Class H insulation with 260°C (500°F) temperature resistance, making it a reliable solution for electronics, automotive, and aerospace applications.
How Is Double-Sided Polyimide Tape Constructed
The tape is made up of three functional layers, each with a specific role.
The first is the polyimide film base, which forms the core of the tape. It is available in thicknesses of 0.025mm (1.0 mil), 0.05mm (2.0 mil), and 0.1mm (4.0 mil), and provides mechanical strength, dimensional stability, and high-temperature resistance.
The second layer is a high-temperature-stable, double-sided silicone adhesive for bonding metals, plastics, ceramics, and electronics.
The third layer is a fluorinated release film, used to protect the adhesive surface prior to use. It is available in transparent or white, with thicknesses ranging from 0.05mm to 0.075mm, and also enables clean die-cutting.
How Does Double-Sided Polyimide Tape Work
The performance of the tape comes from the synergy between its polyimide substrate and silicone adhesive system. Polyimide films retain their structural integrity at extreme temperatures, resisting deformation and failure. This silicone adhesive reliably bonds metals and polymers commonly used in PCBs and electronic components. This fluorine release film is suitable for cleanroom operations, precision die-cutting, and automated placement on high-speed production lines.
Key Features and Benefits
High-Temperature Resistance (260°C)
Withstands 260°C (500°F) and stays stable through soldering processes that melt ordinary tapes.
Excellent Electrical Insulation (H-Class)
This tape offers Class H insulation performance and a dielectric strength ranging from 5,000V to 12,000V (depending on thickness), helping to prevent short circuits in high-density circuits and enhance reliability.
Strong Silicone Adhesion
The double-sided silicone adhesive provides stable bonding performance across a wide temperature range. Adhesion to steel ranges from 3.5 to 6.5 N/25mm, ensuring durability in both static and dynamic applications.
Chemical and Corrosion Resistance
The tape resists moisture, solvents, and chemicals. Moisture/solvent/chemical-resistant with a corrosion resistance coefficient of 1, it won’t accelerate corrosion on copper or PCB traces—key to long-term reliability.
Low Release Force for Manufacturing Efficiency
Fluorine release films offer extremely low release force for smooth peeling in automated processes—boosting efficiency, reducing waste, and supporting high-speed die-cutting.
Easy Die-Cutting Capability
The tape can be precisely die-cut into custom shapes, pads, or labels. This makes it an ideal choice for automated manufacturing systems and customized electronic assembly requirements.
Common Applications
Applications include PCB soldering protection, temporary bonding, and interlayer insulation; mobile device battery insulation, display bonding, and component mounting with die-cut support; transformer/motor/high-voltage cable insulation (TF310-100, ≥12,000V); high-temperature masking for 3D printing and powder coating; and automotive/aerospace uses such as engine compartments, sensor insulation, and avionics where heat and vibration resistance are critical.
Technical Specifications – TF310 Series
The above features are fully realized in our TF310 series, which is available in four variants. Their specifications are summarized below:
| Model | Base Film Thickness | Total Thickness | Release Film | Adhesion (N/25mm) | Tensile Strength | Dielectric Strength | Application |
| TF310-025 | 0.025mm (1.0 mil) | 0.095mm (3.8 mil) | 0.075mm × 2 | 5–6 | 14 kg | ≥5000V | PCB, die-cut labels |
| TF310-050 | 0.05mm (2.0 mil) | 0.15mm (6.0 mil) | 0.05mm | 5–6 | 20 kg | ≥7000V | Consumer electronics |
| TF310-100 | 0.1mm (4.0 mil) | 0.2mm (8.0 mil) | 0.05mm | 4.5–6.5 | 35 kg | ≥12000V | Transformer insulation |
| TF310-070 | 0.025mm (1.0 mil) | 0.07mm (2.8 mil) | 0.05/0.075mm | 3.5–4.5 | 14 kg | ≥5000V | Ultra-thin applications |
All variants feature amber polyimide film, H-class insulation, corrosion resistance coefficient of 1, and elongation of 45%–65%, ensuring flexibility and durability in real-world applications.
How to Choose the Right Double-Sided Polyimide Tape
Match Tape Thickness to Your Application Gap
The total tape thickness directly impacts the tape’s suitability for specific applications. For applications with tight clearances or minimal gaps, the TF310-070 (0.07mm total thickness) provides the thinnest profile while maintaining adequate adhesion. For general PCB assembly and label applications, the TF310-025 (0.095mm total thickness) offers balanced performance. For consumer electronics where moderate thickness is acceptable, the TF310-050 (0.15mm total thickness) provides enhanced tensile strength. For high-voltage transformer insulation requiring maximum electrical protection, the TF310-100 (0.2mm total thickness) delivers the highest dielectric strength of ≥12000V.
Evaluate Adhesive Strength Requirements
Different applications demand different levels of adhesion. The TF310-070 offers adhesion of 3.5–4.5 N/25mm, suitable for applications requiring moderate bonding or where removal may be needed. The TF310-025 and TF310-050 provide adhesion of 5–6 N/25mm, offering strong bonding for most general applications. The TF310-100 delivers 4.5–6.5 N/25mm, balancing strong adhesion with higher mechanical strength for demanding insulation applications.
Consider Temperature and Voltage Requirements
All TF310 high temperature polyimide tape variants offer 260°C continuous temperature resistance, ensuring thermal stability across the product line. However, dielectric strength varies significantly. For low-voltage electronics, ≥5000V may be sufficient. For applications involving higher voltages, the TF310-050 provides ≥7000V, while the TF310-100 offers ≥12000V for maximum electrical insulation.
Select the Right Release Film Option
Release films are available in transparent or white options, with thicknesses of 0.05mm or 0.075mm. The choice affects handling characteristics and suitability for different manufacturing processes. Transparent release film allows for visual inspection of the adhesive, while white film provides better contrast for automated optical inspection systems.
Why Choose TF310 Double-Sided Polyimide Tape
The TF310 series offers four models designed for precision electronics manufacturing, enabling users to select specifications that perfectly meet their needs.
Key advantages include:
- 260°C continuous temperature resistance
- H-class electrical insulation
- Corrosion resistance coefficient of 1
- Die-cut compatibility for automation
- Stable silicone adhesive performance
- Flexible thickness options for different industries
The availability of transparent or white release film and low release force design also supports efficient automated production lines.
Conclusion
Double-sided polyimide tape combines a polyimide film base, silicone adhesive, and fluorine release film to deliver 260°C heat resistance, H-class insulation (up to 12,000V), and corrosion-free bonding for copper circuits. The TF310 series offers four variants to match different thickness, adhesion, and voltage needs—from ultra-thin TF310-070 to high-insulation TF310-100. With low-release-force design and die-cut compatibility, it boosts automated production efficiency. Whether for PCB assembly, transformer insulation, or automotive electronics, TF310 tape provides reliable, long-term performance in extreme environments, making it an essential solution for demanding industrial applications. If you are interested in our products, please feel free to contact us for a quote.
Frequently Asked Questions
What is the maximum temperature rating?
All TF310 variants support continuous use at 260°C (500°F).
Is it safe for copper circuits?
Yes. The corrosion resistance coefficient of 1 ensures no corrosion to copper or metal surfaces.
Can it be die-cut?
Yes. It is designed for precise die-cutting and automated processing.
What release film options are available?
Transparent or white fluorine release films, applied on one or both sides.
