Pomalux®
(acetal copolymer)
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Download Product Brochure (47kb - pdf)
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Pomalux is a high-performance acetal copolymer that has excellent mechanical, electrical, and
wear properties. It is engineered to provide outstanding dimensional stability, even when
machining parts with complex geometries. Pomalux is an excellent choice for many bearing
and wear applications since it has low coefficient of friction and wears well in both wet and dry
environments. It is widely used for assembly jigs and fixtures because of its inherent dimensional
stability and excellent wear properties. Pomalux is often specified for electrical applications
when low moisture absorption and high dielectric strength are required. Both natural (white)
and black Pomalux are FDA compliant for use in food processing machinery.
The following physical property information is based on typical values of the base acetal
copolymer resin.
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| Mechanical Properties |
| Property |
Units |
Test |
Unfilled |
25% GF |
| Flexural Modulus |
psi |
ASTM D790 |
370,000 |
1,050,000 |
| Hardness-Rockwell |
- |
ASTM D785 |
M80 |
M84 |
| Izod Impact Strength Notched @-40°F |
ft•lbs/in |
ASTM D256 |
1.2 |
0.7 |
| Izod Impact Strength Notched @73°F |
ft•lbs/in |
ASTM D256 |
1.5 |
1.1 |
| Tensile Elongation @break @ -40°F |
% |
ASTM D638 |
- |
2.0 |
| Tensile Elongation @break @ 73°F |
% |
ASTM D638 |
- |
3.5 |
| Tensile Elongation @break @ 160°F |
% |
ASTM D638 |
- |
5.0 |
| Tensile Modulus |
psi |
ASTM D638 |
380,000 |
1,200,000 |
| Tensile Strength @yield @ 73°F |
% |
ASTM D638 |
- |
16,000 |
| Tensile Strength @yield @ -40°F |
% |
ASTM D638 |
8600 |
23,100 |
| Tensile Strength @yield @ 160°F |
% |
ASTM D638 |
- |
10,000 |
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| Other Properties |
| Property |
Units |
Test |
Unfilled |
25% GF |
| Specific Gravity |
- |
ASTM D792 |
1.40 |
1.62 |
| Water Absorption @ 24 hrs |
% |
ASTM D570 |
0.20 |
0.27 |
| Dielectric Constant |
1e+006 Hz |
ASTM D150 |
3.80 |
- |
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| Thermal Properties |
| Property |
Units |
Test |
Unfilled |
25% GF |
| Continuous Use Temp. |
°F |
ASTM D794 |
212 |
- |
| Coefficient of Thermal Expansion |
in/in/°F |
ASTM D696 |
- |
2.2x10-5 |
| Flam. Rating-UL94 @ .060" |
- |
- |
HB |
- |
| Heat Deflection Temp. @ 66 psi |
°F |
ASTM D648 |
315 |
331 |
| Heat Deflection Temp. @ 264 psi |
°F |
ASTM D648 |
219 |
325 |
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| Applications Include: |
| Jigs and fixtures |
| Pump and valve parts |
| Bushings |
| Bearings |
| Gears |
| Wear pads |
| Electrical components |
| Advantages of Pomalux®: |
| High strength and stiffness |
| Low friction |
| Easy to machine |
| Good dimensional stability |
| Low moisture absorption |
| Resists abrasive wear in both
wet and dry environments |
| Good chemical resistance |
| Excellent electrical properties |
| FDA compliant |
| Manufacturing Capabilities: |
| Rod: 1/8” to 8” diameter |
| Sheet: .030” to 4” thick |
| Film: .002” to .029” thick |
| Color/Grades: |
| Natural (white) FDA |
| Black FDA |
| Glass-filled |
| PTFE-filled (Dielux) |
| Non-standard colors are available
on a custom basis |
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*In addition to our standard capabilities, Westlake
also has the ability to process custom resins in
various sizes and colors with some exceptions.
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Pomalux® is a Registered Trademark of Westlake Plastics Co.
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