|
|
Pomalux ® Static-Control Acetal
Specifications
GENERAL DESCRIPTION
Acetal is the common name for a family of thermoplastics with the
chemical name "PolyOxy-Methylene". Acetal is available in a general purpose
copolymer grade which provides high strength and stiffness, enhanced
dimensional stability, good machinability, a low coefficient of friction and
good wear properties. By adding special conductive materials to the resin,
the conductivity of acetal is increased to control static electricity
formation or conduction.
These additives may be in the form of non-carbon alloys, carbon powder, or
carbon fibers. Some properties of the original acetal copolymer are modified
by the addition of fillers, but chemical resistance, strength, and
manufacturability remain generally the same.
AntiStatic materials are available in NATURAL
and BLACK colors, conductive
material is always BLACK in color.
( see also
Standard Acetal and
Semitron ESd 225 Static-Dissipative Acetal )
Static Dissipative / Anti-Static (SD) :
Resistivity generally between 10 7 and 10 12 ohms per
square.
Initial electrostatic charges are suppressed.
Conductive (CN) :
Resistivity generally between 10 3 and 10 6 ohms per
square.
No initial charge, provides path for charge to bleed off.
| TYPICAL PROPERTIES of POMALUX ®
STATIC-CONTROL ACETAL |
| ASTM or UL test |
Property |
Pomalux ® SD-A |
Pomalux ® CN-F |
Pomalux ® CN-SS
|
| - |
Classification |
Anti-Static |
Conductive |
Conductive |
| - |
Filler Material |
Non-Carbon Alloy |
Carbon Fiber |
Stainless Steel |
| PHYSICAL |
| D792 |
Density (lb/in³)
(g/cm³) |
0.047
1.30 |
0.052
1.44 |
0.054
1.50 |
| D570 |
Water Absorption, 24 hrs (%) |
2.5 |
0.26 |
- |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
6,200 |
11,000 |
8,600 |
| D638 |
Tensile Modulus (psi) |
- |
- |
- |
| D638 |
Tensile Elongation at Yield (%) |
350 |
3 |
- |
| D790 |
Flexural Strength (psi) |
8,600 |
14,000 |
13,000 |
| D790 |
Flexural Modulus (psi) |
260,000 |
1,100,000 |
400,000 |
| D695 |
Compressive Strength (psi) |
- |
- |
- |
| D695 |
Compressive Modulus (psi) |
- |
- |
- |
| D785 |
Hardness, Rockwell R |
- |
- |
- |
| D256 |
IZOD Notched Impact (ft-lb/in) |
1.3 |
0.9 |
0.7 |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10 -5 in./in./°F) |
6.5 |
2.6 |
4.9 |
| D648 |
Heat Deflection Temp (°F / °C)
at 66 psi
at 264 psi |
-
192 / 89 |
-
320 / 160 |
-
225 / 107 |
| D3418 |
Melting Temperature (°F / °C) |
- |
- |
- |
| - |
Max Operating Temp (°F / °C) |
- |
- |
- |
| C177 |
Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10 -4 cal/cm-sec-°C) |
2.1
7.2 |
-
-
|
-
-
|
| UL94 |
Flammability Rating |
- |
- |
- |
| ELECTRICAL |
| D257 |
Surface Resistivity (ohms/sq) |
10 9 -10
11 |
10 2 -10
6 |
10 2 -10
6 |
| D257 |
Volume Resistivity (ohm-cm) at 73°F, 50% RH |
10 9 -10
11 |
10 2 -10
6 |
10 2 -10
6 |
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.
POMALUX is a registered trademark of Westlake Plastic
Company
|
