Battery supporting materials
Amber Polyimide Tape with Silicone Adhesive for Lithium Battery Cell Insulation Protection 2 to 500mm Width
Item Number : FZ48
Price varies based on specs and customizations
- Total Thickness Range
- 0.035 mm - 0.060 mm
- Breakdown Voltage
- 5 kV - 6 kV
- Temperature Range
- -40°C to +150°C
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Product Overview
This high-performance amber polyimide tape is specially engineered with an ultra-thin polyimide (PI) film backing coated with a precision-formulated high-temperature silicone pressure-sensitive adhesive. Designed specifically for the rigorous demands of lithium-ion cell fabrication, the material provides exceptional electrical insulation, outstanding chemical resilience against harsh organic electrolytes, and dependable mechanical integrity. Its ultra-slim profile enables seamless conformability around tight core contours without adding unwanted volume to precision battery assemblies.
Developed primarily for electric vehicle (EV) battery production, consumer electronics energy storage, and advanced energy research laboratories, this insulating solution excels in tab wrapping, electrode lead insulation, internal core wrapping, and external structural protection. The specialized silicone adhesive layer ensures immediate tack and superior holding power across a broad operating spectrum, maintaining an unyielding bond under cyclical thermal and chemical stresses.
Manufactured under stringent cleanroom quality standards, this insulation material delivers flawless edge quality, zero curling, and completely residue-free removal during high-temperature baking and electrolyte immersion cycles. Compliant with international environmental regulations including RoHS and halogen-free directives, the tape ensures total operational reliability and safety for pilot-scale R&D and high-volume automated battery cell manufacturing.
Key Features
- Specialized Polyimide Substrate: Utilizes an ultra-thin, high-tensile polyimide film available in calibrated thicknesses from 0.035 mm to 0.060 mm, providing excellent flexibility, puncture resistance, and seamless wrapping performance.
- High-Temperature Silicone Formulation: Coated with a premium synthetic silicone pressure-sensitive adhesive that maintains robust bonding integrity and peel strength across severe thermal environments ranging from -40°C to +150°C.
- Superior Dielectric Breakdown Strength: Features high dielectric performance with breakdown ratings up to 6 kV, effectively preventing micro-short circuits, electrical arc discharge, and voltage breakdown between internal battery components.
- Residue-Free Clean Peeling: Specially engineered cross-linked adhesive chemistry guarantees that the film does not lift, warp, or leave any adhesive residue after exposure to high-temperature drying ovens or thermal bonding processes.
- Electrolyte and Chemical Resistance: Highly resistant to aggressive organic carbonate solvents, lithium salts, and additives found in lithium-ion battery electrolytes, preventing swelling, dissolution, or premature adhesion loss.
- Optimized Unwinding Dynamics: Exhibits smooth, moderate unwinding tension that prevents film elongation and tape distortion, ensuring continuous compatibility with both high-speed automated winding equipment and precision manual assembly.
- Extensive Slit Width Customization: Offered in exact slitting widths spanning from 2 mm to 500 mm and standardized roll lengths up to 100 m, accommodating diverse cell form factors including pouch, cylindrical, and prismatic cells.
- Eco-Friendly and Halogen-Free Compliance: Manufactured in strict adherence to RoHS and halogen-free standards, ensuring non-toxic, eco-conscious deployment across commercial green-energy supply chains.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Pouch Cell Tab Insulation | Applied directly around cathode and anode terminal tabs and lead welding zones to isolate metal tabs from the aluminum laminated film casing. | Prevents edge short-circuiting and puncture failures caused by burrs during sealing. |
| Cylindrical Cell Core Wrapping | Serves as the terminating tape around the outer circumference of wound jelly-roll electrode assemblies (e.g., 18650, 21700, 46800 formats). | Maintains constant winding tension and tight diameter tolerance without edge lifting. |
| Prismatic Cell Electrode Bundling | Secures stacked or wound electrode groups prior to insertion into deep-drawn aluminum or steel battery cans. | Ensures high dielectric isolation between internal active groups and outer metal shell walls. |
| Battery Circuit Lead Protection | Insulates internal wiring, sensor leads, and embedded thermocouple connections across modular battery packs. | Delivers reliable thermal and electrical insulation under extreme vibrational stress. |
| High-Temperature Baking Masking | Protects sensitive contact points and terminals during vacuum drying, electrode baking, and hot-press curing stages. | Leaves zero adhesive residue after prolonged high-temperature vacuum oven exposure. |
| Electronic Component Wrapping | Provides primary phase and layer insulation for micro-transformers, high-frequency inductors, and specialized power electronics. | Offers class-leading dielectric breakdown resistance in a space-saving ultra-thin footprint. |
Technical Specifications
| Parameter | FZ48-0035 | FZ48-0042 | FZ48-0055 | FZ48-0060 |
|---|---|---|---|---|
| Base Film Material | Special Polyimide (PI) Film | Special Polyimide (PI) Film | Special Polyimide (PI) Film | Special Polyimide (PI) Film |
| Adhesive Type | High-Temp Silicone PSA | High-Temp Silicone PSA | High-Temp Silicone PSA | High-Temp Silicone PSA |
| Total Thickness (mm) | 0.035 | 0.042 | 0.055 | 0.060 |
| Color | Amber / Tea-Brown | Amber / Tea-Brown | Amber / Tea-Brown | Amber / Tea-Brown |
| Adhesion to Steel (N/25mm) | 5 | 5 | 6 | 6 |
| Tensile Strength (N/25mm) | 50 | 50 | 75 | 75 |
| Temperature Resistance Range (°C) | -40 to +150 | -40 to +150 | -40 to +150 | -40 to +150 |
| Breakdown Voltage (kV) | 5 | 5 | 6 | 6 |
| Unwinding Force | Moderate / Smooth | Moderate / Smooth | Moderate / Smooth | Moderate / Smooth |
| Standard Width Range (mm) | 2 to 500 | 2 to 500 | 2 to 500 | 2 to 500 |
| Standard Length Options (m) | 33, 50, 66, 100 | 33, 50, 66, 100 | 33, 50, 66, 100 | 33, 50, 66, 100 |
| Environmental Compliance | RoHS, Halogen-Free | RoHS, Halogen-Free | RoHS, Halogen-Free | Halogen-Free |
Note: The technical data presented above reflects standard laboratory testing averages and is intended for engineering reference during process qualification.
Why Choose This Product
- Engineered for Battery Reliability: Specifically developed to withstand the harsh electro-chemo-mechanical environment inside secondary lithium cells, eliminating risk of internal shorts or chemical contamination.
- Precision Slitting Capabilities: Available in precision razor-slit widths down to 2 mm with tight edge tolerances, ensuring seamless integration into automated tab-taping and jelly-roll winding machinery.
- Exceptional Thermal and Dielectric Margin: High breakdown voltage up to 6 kV combined with continuous -40°C to +150°C thermal stability provides an essential safety buffer for high-energy-density cells.
- Zero-Defect Surface Finish: Free from pinholes, adhesive voids, fish-eyes, and edge burrs, delivering uniform adhesion and consistent unwinding dynamics across the entire roll length.
- Comprehensive Process Customization: Backed by responsive technical support offering tailored widths, master rolls, and specialized thickness grades to suit demanding R&D and high-volume gigafactory requirements.
Contact our technical sales team today to request custom sample rolls, detailed specification sheets, or bulk volume quotations tailored to your battery production line.
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