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Grade: DuPont™ Kevlar® 29
Formula: Polyparaphenylene terephthalamide
Form: Fiber
Material: Polyaramide
Commodity: Polymers
DuPont™ Kevlar® 29 is a polyaramid fiber offered in Goodfellow's range of fibers. This fiber exhibits high tensile strength and modulus while maintaining flexibility. Kevlar® 29 also has excellent thermal, impact, and cut resistance. This fiber finds use in a wide variety of applications including bulletproof vests, helmets, ropes and cables, brake pads, and composites. With its exceptional combination of strength, heat resistance, and chemical stability, Kevlar® 29 stands out as a high-performance fiber.
Tolerances
Fiber
| Filament Diameter | ±25% | |
|---|---|---|
| Number Of Yarns | ±10% | |
| Number Of Filaments | ±10% | |
| Tex Number | ±10% | |
| Length | +5% / -1% |
Material Properties for Polymers
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Poor |
| Acids - dilute | Fair |
| Alcohols | Good |
| Alkalis | Good-Poor |
| Aromatic hydrocarbons | Good |
| Greases and Oils | Good |
| Halogenated Hydrocarbons | Good |
| Halogens | Good |
| Ketones | Good |
Physical Properties
| Element | Value |
|---|---|
| Resistance to Ultra-violet | Fair |
| Water absorption( % ) | 3.5 |
| Water absorption - equilibrium( % ) | 3.5 |
| Density( gcm⁻³ ) | 1.44 |
Thermal Properties
| Element | Value |
|---|---|
| Lower working temperature( C ) | -200 |
| Upper working temperature( C ) | 180-245 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1400 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.04@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | -2Along Axis |
Mechanical Properties
| Element | Value |
|---|---|
| Tensile modulus( GPa ) | 59-124 |
| Tensile strength( MPa ) | 2760 |
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Polyaramid Film (Polymetaphenylene isophthalamide) Formula: Polymetaphenylene isophthalamide
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