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Polycarbonate Specifications
DESCRIPTION
Unfilled Polycarbonate is a tough, transparent engineering
thermoplastic which offers very high impact strength and high modulus of
elasticity. It also has a high heat deflection temperature and absorbs very
little moisture. These properties, plus good low frequency and high voltage
insulating characteristics, make polycarbonate a prime material for
electrical and electronic components. Its strength, impact resistance and
transparency ( unfilled grades only
) also make it an ideal material for certain transparent structural
applications.
Zelux ® M is machine-grade polycarbonate, while
Zelux
® W is window-clear material for applications
where transparency is an important consideration.
( see also
PC-300/350 Anti-Static and
Zelux® Static Control Polycarbonates )
GLASS FILLED GRADES
Glass fibers may be added in various amounts (10%, 20%, 30% and
40%) to increase tensile strength, stiffness, compressive strength, and
lower the thermal expansion coefficient. NOTE: Glass-filled polycarbonate is
typically
NATURAL (greenish white) in color, and
is sometimes also available in BLACK
color. Properties for 30% glass-filled polycarbonate are shown below for
reference. Contact us for properties of other grades.
KEY PROPERTIES
• high impact strength • excellent strength retention
at elevated temperatures • high tensile, shear, and flexural
strength • high modulus of elasticity • low
deformation under load • excellent creep and cold flow
resistance • low coefficient of thermal expansion •
good electrical insulation properties • easy to fabricate &
machine
TYPICAL APPLICATIONS
Polycarbonate exhibits a broad range of outstanding properties for
applications in: • electrical connectors • brush holders
• coil bobbins & forms • insulators • relay
components • dialysis equipment parts • medical
tubing • gamma sterilizable reusables • instrument covers
• covers • handles • rollers • machine guards •
fittings
| TYPICAL PROPERTIES of POLYCARBONATE |
| ASTM or UL test |
Property |
Unfilled |
30% Glass |
| PHYSICAL |
| D792 |
Density (lb/in³)
(g/cm³) |
0.043
1.2 |
0.052
1.43 |
| D570 |
Water Absorption, 24 hrs (%) |
0.12 |
0.12 |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
9,500 |
19,000 |
| D638 |
Tensile Modulus (psi) |
320,000 |
- |
| D638 |
Tensile Elongation at Break (%) |
60 |
10 |
| D790 |
Flexural Strength (psi) |
15,000 |
23,000 |
| D790 |
Flexural Modulus (psi) |
375,000 |
1,100,000 |
| D695 |
Compressive Strength (psi) |
12,000 |
18,000 |
| D695 |
Compressive Modulus (psi) |
240,000 |
500,000 |
| D785 |
Hardness, Rockwell |
M70 / R118 |
M92 |
| D256 |
IZOD Notched Impact (ft-lb/in) |
13 |
2 |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10 -5 in./in./°F) |
3.9 |
1.2 |
| D648 |
Heat Deflection Temp (°F / °C)
at 264 psi |
270 / 132 |
295 / 146 |
| D3418 |
Glass Transition Temp (°F / °C) |
293 / 145 |
300 / 149 |
| - |
Max Operating Temp (°F / °C) |
250 / 121 |
270 / 132 |
| C177 |
Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10 -4 cal/cm-sec-°C) |
1.3
6.9 |
1.3
6.9 |
| UL94 |
Flammability Rating |
H-B / V-0* |
H-B / V-0* |
| ELECTRICAL |
| D149 |
Dielectric Strength (V/mil) short time, 1/8" thick |
390 |
470 |
| D150 |
Dielectric Constant at 60 Hz |
3.17 |
3.35 |
| D150 |
Dissipation Factor at 60 Hz |
0.0009 |
0.0011 |
| D257 |
Volume Resistivity (ohm-cm)at 50% RH |
10 16 |
10 16 |
* UL94 Rating depends upon thickness and manufacturer!
NOTE: The information contained herein are typical values intended
for reference and comparison purposes only. They should NOT be used as a
basis for design specifications or quality control. Contact us for
manufacturers' complete material property datasheets.
All values at 73°F (23°C) unless otherwise noted.
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