Polyimide Bonding Film Description:
Polyimide Bonding Film is a high-performance insulating material made from polyimide film coated with an aromatic polyesterimide adhesive. It is soft, smooth, and golden-yellow in color at room temperature, with a semi-transparent appearance. The film is non-adhesive in its original form and becomes highly adhesive after heating to 230°C for 5 minutes, providing strong bonding and electrical insulation. It features excellent water, acid, and heat resistance, and prevents oxidation of copper wire. With a long-term operating temperature of 180°C, it offers thin insulation, good sealing properties, high breakdown voltage, and simple manufacturing processes. The film is commonly used in winding flat copper wires and main insulation for DC and AC motor coils, where it can be heat-pressed into a solid, cohesive layer for easy handling and reliable performance.
Polyimide Bonding Film Specifications:
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Material
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Polyimide, Polyesterimide
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Color/Appearance
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Translucent Golden Yellow Film
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Thicknesses
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0.037mm～0.125mm
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Tensile Strength
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≥110MPa
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Elongation at break
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≥45%
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industrial frequency electrical strength
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≥150MV/m
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Surface Resistivity
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≥1.0×10^14Ω
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Bulk resistivity
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≥1.0×10^13Ω.m
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Relative dielectric constant (50 Hz)
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3-4
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Dielectric loss factor (50Hz)
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≤1.0×10^-3
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Peel strength (film to adhesive)
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≥7.5N/25mm
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Polyimide Bonding Film Applications:
1. Copper Wire Insulation – Used for winding flat copper wires, providing thin yet effective insulation, high breakdown voltage, and strong adhesion.
2. Motor Coil Insulation – Applied as main insulation for DC and AC motor coils, where it bonds into a solid structure after heat pressing, simplifying processing.
3. Electrical and Electronic Components – Provides thermal and electrical insulation for transformers, inductors, and high-voltage electrical components.
4. Sealing and Bonding Applications – Ideal for applications requiring high-temperature-resistant bonding, ensuring reliable adhesion and mechanical stability.
5. Aerospace and Automotive – Used in high-performance electrical insulation systems in aerospace and automotive industries, where heat resistance and durability are critical.
6. Printed Circuit Board (PCB) Manufacturing – Utilized in PCB assembly and flexible circuits, offering insulation and protective bonding.
Polyimide Bonding Film Packing:
Our Polyimide Bonding Film is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
Polyimide Bonding Film FAQ:
Q1: What is Polyimide Bonding Film?
A1: Polyimide Bonding Film is a polyimide film-based material coated with an aromatic polyesterimide adhesive. It remains soft, smooth, and non-adhesive at room temperature but develops strong bonding and electrical insulation properties when heated to 230°C for 5 minutes. It offers excellent heat resistance, insulation, and chemical stability, making it ideal for winding copper wires, motor coils, and other electrical applications.
Q2: What are the key properties of Polyimide Bonding Film?
A2: Excellent electrical insulation – Ensures high dielectric strength.
Strong adhesion after heating – Bonds effectively at 230°C, lower than FH/FHF films.
Heat-resistant – Long-term operating temperature of 180°C.
Good chemical resistance – Resistant to water, acid, and oxidation.
Flexible and easy to handle – Suitable for various winding and insulation processes.
Q3: What are the common applications of this film?
A3: Winding insulation for flat copper wires in electrical systems.
Main insulation for DC and AC motor coils, forming a solid, cohesive layer after heat pressing.
Thermal and electrical insulation in transformers, inductors, and high-voltage electrical components.
Sealing and bonding applications requiring high-temperature resistance.
Aerospace and automotive electrical insulation where durability and heat resistance are critical.
PCB and flexible circuit insulation in electronics manufacturing.
