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Lexan® 8B28 Polycarbonate Disk
Available Configurations
Properties common to all products in this list
Starting at
$228.00
each
No Minimum order
Free technical support
*Free delivery worldwide
Material Properties
Physical Properties
| Element | Value |
|---|---|
| Abbe number | 34 |
| Flammability | V0-V2 |
| Radiation resistance | Fair |
| Refractive index | 1.584-6 |
| Resistance to Ultra-violet | Fair |
| Limiting oxygen index( % ) | 25-27 |
| Water absorption - equilibrium( % ) | 0.35 |
| Water absorption - over 24 hours( % ) | 0.1 |
| Density( gcm⁻³ ) | 1.2 |
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Good |
| Acids - dilute | Good |
| Alcohols | Good |
| Alkalis | Good-Poor |
| Aromatic hydrocarbons | Poor |
| Greases and Oils | Good-Fair |
| Halogenated Hydrocarbons | Good-Poor |
| Halogens | Poor |
| Ketones | Poor |
Mechanical Properties
| Element | Value |
|---|---|
| Coefficient of friction | 0.31 |
| Hardness - Rockwell | M70 |
| Poisson's ratio | 0.37 |
| Elongation at break( % ) | 100-150 |
| Tensile modulus( GPa ) | 2.3-2.4 |
| Izod impact strength( J m⁻¹ ) | 600-850 |
| Abrasive resistance - ASTM D1044( mg/1000 cycles ) | Oct-15 |
| Tensile strength( MPa ) | 55-75 |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 2.9 |
| Dissipation factor @ 1MHz | 0.01 |
| Dielectric strength( kV mm⁻¹ ) | 15-67 |
| Surface resistivity( Ohm/sq ) | 10¹⁵ |
| Volume resistivity( Ohmcm ) | 10¹⁴-10¹⁶ |
Thermal Properties
| Element | Value |
|---|---|
| Heat-deflection temperature - 0.45MPa( C ) | 140 |
| Heat-deflection temperature - 1.8MPa( C ) | 128-138 |
| Lower working temperature( C ) | -135 |
| Upper working temperature( C ) | 115-130 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1200 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.19-0.22@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 66-70 |
Pultrusions
| Element | Value |
|---|---|
| Compressive strength( MPa ) | >80 |
Tolerances
Disc
| Thickness | ±20% |
|---|