Description
Product Overview
PI (Polyimide) filament yarn is a high-performance fiber featuring exceptional heat resistance, excellent chemical stability, inherent flame retardancy and superior mechanical properties. It maintains stable performance in extreme environments and is widely used in aerospace, high-temperature filtration, electrical insulation and other advanced industrial applications.
Available Specifications
- Fineness Range: 50-3000 dtex; other specifications on request
- Filament Count: Customized according to application
- Performance Grades: According to GB/T 39027-2020
- Strength Grades: 20 / 25 / 30 / 35 / 40 (cN/dtex level)
- Modulus Grades: 100 / 120 / 140 / 160 (GPa level)
Typical Technical Data (Reference)
| Property | Typical Value | Test Method |
|---|---|---|
| Linear Density | 50-3000 dtex | GB/T 35441-2017 / GB/T 39027-2020 |
| Filament Type | Continuous filament | – |
| Tensile Strength | 2.0-4.0 GPa (20-40 cN/dtex) | GB/T 39027-2020 |
| Tensile Modulus | 100-160 GPa (100-160 cN/dtex) | GB/T 39027-2020 |
| Elongation at Break | 2-5% | GB/T 39027-2020 |
| Heat Resistance (Long Term) | ≥ 300°C | – |
| Glass Transition Temperature (Tg) | ≈ 360°C (typical, depending on grade) | DSC |
| Decomposition Temperature (Td, 5%) | ≥ 500°C | TGA |
| Limiting Oxygen Index (LOI) | ≥ 30 | ASTM D2863 |
| Moisture Regain | ≤ 1.0% | ASTM D570 |
| Color | Golden Orange (others on request) | – |
Key Features
- Outstanding heat resistance (≥ 300°C)
- Excellent chemical and solvent resistance
- High strength and high modulus
- Inherent flame retardancy (high LOI)
- Good dimensional stability
- Low moisture absorption
- Customizable specifications
Typical Applications
- Aerospace & Aviation: Thermal protection, structural reinforcement, high-temperature components
- Protective Equipment: Firefighting suits, heat-resistant clothing, protective gear
- Electrical Insulation: Cables, wires, insulating tapes, high-temperature electrical materials
- High-Temperature Filtration: Filter bags, filter cloth, industrial filtration
- Advanced Composites: High-performance composites, structural reinforcement
Sample & Global Supply
Samples are available. Customized specifications and global supply are available for qualified applications.
Technical Note
The above data are typical values for reference only. Final values are subject to our factory’s official TDS.
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