Jun 25 2003
Background
The addition of glass fibre to nylons leads to very significant increases in strength, stiffness, heat distortion temperatures, abrasion resistance and dimensional stability, though properties can be anisotropic - including mould shrinkage, leading to potential distortion.
In the case of Polyamide – Nylon 6/6 30% Glass Fibre Reinforced - unlike many polymers - this is achieved without loss of impact strength, though elongation to break is, as usual, reduced very substantially. Glass-reinforced nylon is commonly coloured black.
Applications
Applications of Polyamide – Nylon 6/6 30% Glass Fibre Reinforced include many engineering components such as "under-bonnet" automobile parts and most components on wind-surfers.
Key Properties
The key properties of Polyamide - Nylon 6/6 30% Glass Fibre Reinforced are tabulated below.
| Chemical Resistance |
| Acids - concentrated |
Poor |
| Acids - dilute |
Poor |
| Alkalis |
Very Good |
| Aromatic hydrocarbons |
Very Good |
| Ketones |
Very Good |
| Electrical Properties |
| Dielectric constant @ 1 MHz |
3.9-5.7 |
| Volume resistivity ( Ohm.cm ) |
1012-1015 |
| Mechanical Properties |
| Elongation at break ( % ) |
5 |
| Hardness – Rockwell |
M100 |
| Izod impact strength ( J.m-1 ) |
120 |
| Tensile modulus ( GPa ) |
10-11 |
| Tensile strength ( MPa ) |
160-210 |
| Physical Properties |
| Density ( g.cm-3 ) |
1.4 |
| Limiting oxygen index ( % ) |
22 |
| Water absorption - over 24 hours ( % ) |
1-5 |
| Thermal Properties |
| Coefficient of thermal expansion ( x10-6 K-1 ) |
20-30 |
| Heat-deflection temperature - 0.45 MPa (°C ) |
257 |
| Heat-deflection temperature - 1.8 MPa (°C ) |
252 |
| Thermal conductivity ( W.m-1.K-1 ) |
0.23 @ 23 |
| Upper working temperature ( °C ) |
80-200 |
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