Aramid Fiber
Aramid fiber is a heterocyclic aromatic polyamide fiber with low density, high strength, high modulus, impact resistance, insulation, flame retardant, wave transmission, fatigue resistance, high and low temperature resistance, acid and alkali resistance, and dimensional stability.
It is one of the organic fibers with the best comprehensive performance, and which is widely used in helicopters, fixed-wing aircraft engines, aerospace high-pressure gas cylinders, rocket casings and outer heat shields, airship skin materials, personal protective equipment, high-performance radomes, rubber products, special ropes, and webbing, etc.
Physical and chemical properties of aramid fiber
| Density (g/cm3) | 1.43-1.44 | Limiting Oxygen Index (LOI) | 30~35 |
| Saturated moisture absorption rate (%) | ≤3.0 | Thermal expansion coefficient (1/K) | 1×10-6 |
| Glass transition temperature(℃) | 264 | Decomposition temperature (℃) | 537 |
| Dielectric constant | 3.4 | Dielectric loss | 0.00645 |
| High temperature performance | 180°C, 200 hours, no decrease in strength | ||
| Low temperature performance | -196°C, 200 hours, no decrease in strength | ||
| Moisture and heat properties | 80℃, relative humidity 85%, 2500 hours, fiber strength retention rate above 93% | ||
| Creep properties | 50% fracture load, 3600 hours, creep increment 0.093% | ||
| UV aging properties | Wavelength 290-340nm, irradiation for 360 hours, fiber strength loss 3.5% | ||
Technical specifications of aramid fiber
| Model | Specifications/grades | Line density (tex) | Tensile breaking strength (GPa) | Modulus of elasticity (GPa) | Elongation at break(%) |
| 23T | 23tex | 23±2 | ≥4.2 | ≥140 | ≥2.6 |
| 23TA | 23±1.5 | ≥5.0 | ≥140 | ≥2.6 | |
| 23TB | 23±2 | ≥4.2 | ≥130 | ≥2.5 | |
| 23TC | 23±2 | ≥3.5 | >100 | ≥2.0 | |
| 44T | 44tex | 44±3 | ≥4.2 | ≥140 | ≥2.6 |
| 44TA | 44±2 | ≥5.0 | ≥140 | ≥2.6 | |
| 44TB | 44±3 | ≥4.2 | ≥130 | ≥2.5 | |
| 44TC | 44±3 | ≥3.5 | ≥100 | ≥2.0 | |
| 63T | 63tex | 63±4 | ≥4.2 | ≥120 | ≥2.5 |
| 63TA | 63±3 | ≥4.2 | ≥110 | ≥2.5 | |
| 63TB | 63±4 | ≥3.8 | >110 | ≥2.0 | |
| 100T | 100tex | 100±5 | ≥4.2 | ≥140 | ≥2.6 |
| 100TA | 100±3 | ≥5.0 | ≥140 | ≥2.6 | |
| 100TB | 100±5 | ≥4.2 | ≥130 | ≥2.5 | |
| 100TC | 100±5 | ≥3.5 | ≥100 | ≥2.0 | |
| 130T | 130tex | 130±5 | ≥4.2 | ≥130 | ≥2.6 |
| 130TA | 130±4 | ≥4.5 | ≥120 | ≥2.6 | |
| 130TB | 130±5 | ≥3.8 | ≥110 | ≥2.5 |
Applications
