25μm Heat-resistant Polyimide Film for Electrical Insulation in High-Temperature Applications
The HB-APF25 Series is a 25μm polyimide (PI) film manufactured via polycondensation of pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA), followed by casting, imidization, and stretching. This amber-colored film offers exceptional thermal stability, electrical insulation, and mechanical strength. With a thickness of 25±3μm, PI25 withstands 288°C±5°C for 10 seconds, exhibits low water absorption (<4.0%), and provides excellent dielectric properties. It is supplied in rolls on a 76mm rigid paper core, ideal for demanding electronic, and industrial applications.
| Parameter | Specification | Test Standard |
|---|---|---|
| Thickness | 25±3μm | GB/T7125-2014 |
| Water Absorption Rate | <4.0% | – |
| Relative Permittivity (50Hz) | ≤3.9 | Voltage varies with thickness |
| Dielectric Dissipation Factor (50Hz) | ≤4.0×10⁻³ | – |
| Electrical Strength (Average) | ≥50 MV/m | – |
| Electrical Strength (Individual) | ≥40 MV/m | – |
| Density | 1420±20 kg/m³ | – |
| Shrinkage Rate 200°C | ≤0.3% | Oven Test |
| Temperature Resistance | 288°C±5°C / 10 sec | Oven Test |
| Core Inner Diameter | 76mm (rigid paper core) | – |
| Test Conditions | 23±1°C, 50±5% RH | – |
HB-APF25 polyimide film is trusted across multiple high-reliability industries:
- Electrical Insulation – Layer insulation for motors, transformers, generators, and battery packs. Prevents short circuits at high voltages.
- High-Temperature Masking – Used as a coverlay or protective film during solder reflow, wave soldering, and hot bar soldering processes.
- Automotive – Wire and cable wrapping, thermal shielding, and insulation in engine compartments where temperatures exceed conventional material limits.
Dongguan Huibing Adhesive products Co., Ltd. is a professional adhesive products manufacturer located in Dongguan City, China, focusing on the sales and export of various adhesive tape products.
We mainly supply all kinds of tapes, including clear packing tape, colored tape, double-sided tape, masking tape, printed logo tape, carton sealing tape and industrial adhesive tapes. Our products are widely used in logistics packaging, electronic industry, daily household use, industrial fixing and construction fields.
We insist on stable quality, competitive price, fast delivery and good after-sales service. We support stock supply and customized sizes, thickness, viscosity and logo printing services.With reliable product quality and mature supply chain system, our products are exported to many countries around the world and have won high recognition from global customers.
We sincerely welcome customers from all over the world to establish long-term and stable cooperative partnerships.
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