Aromatic polyamide fibers, also known as aramid fibers, are heat-resistant and high-strength synthetic fibers. Alfa Chemistry offers a range of aromatic polyamide fiber products as your high-performance fiber solutions.
Categories
- Para-aramid fiber
Para-aramid fibers have a unique combination of toughness, ultra-high tenacity, modulus and excellent thermal stability. They are fibers spun from poly(p-phenylene terephthalamide) (PPTA) with the following chemical structure.
- Meta-aramid fiber
Meta-aramid fibers have excellent heat resistance, good textile-like properties and properties, but poor mechanical properties of high-performance fibers. They are fibers spun from poly-(m-phenylene isophthalamide) (MPDI) with the following chemical structure.
Features
Aramid fibers have the following unique characteristics, which are due to their rigid polymer molecular structure with strong crystal orientation and tight interactions between polymer chains due to hydrogen bonding.
- High specific strength
- High specific modulus
- Low density
- Good wear resistance
- Good resistance to organic solvents
- No melting point
- Low flammability
- Anti-aging property
- Good insulation
Comparison Of Several High-Performance Fibers
| Materials | Strength to weight (KN.m/kg) | Ultimate Strength (MPa) | Density (g/cm3) |
|---|
| Aramid fiber | 2514 | 2757 | 1.44 |
| Carbon Fiber | 2457 | 4137 | 1.75 |
| E Glass Fiber | 1307 | 3450 | 2.57 |
| S Glass Fiber | 1906 | 4710 | 2.47 |
| Nylon | 69 | 75 | 1.15 |
Aramid Fiber Composites
Aramid fiber has excellent comprehensive properties and is widely used in the reinforcement of composite materials. Aramid fiber composites have the advantages of high impact and crack resistance, low density/low weight, abrasion resistance, and low dielectric constant of about 3.85 (10 GHz). For example, the impact resistance of aramid fiber composites can reach 5 times that of carbon fiber composites, and aramid fiber composites are about 20% lighter than carbon fiber composites.
Reference
- Mustafa Ertekin. Fiber Technology for Fiber-Reinforced Composites, 2017, 153-167.
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