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GENERAL DESCRIPTION
Acetal is the common name for a family of thermoplastics with the chemical name “PolyOxy-Methylene”. Acetal provides high strength and stiffness, enhanced dimensional stability, and is easy to machine. As a semi-crystalline material, acetal is characterized by a low coefficient of friction and good wear properties.
FEATURES
- High strength, stiffness, dimensional stability
- Very low moisture absorption
- Good wear and abrasion resistance
- Wide range chemical resistance (including many solvents)
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| TYPICAL PROPERTIES OF ACETALS |
| PHYSICAL |
| ASTM or UL test |
Property |
Celcon |
| D792 |
Density (lb/in3)
(g/cm3) |
0.0513
1.413 |
| D570 |
Water Absorption, 24 hrs (%) |
0.2 |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
9,500 |
| D638 |
Tensile Modulus (psi) |
400,000 |
| D638 |
Tensile Elongation at Break (%) |
30 |
| D790 |
Flexural Strength (psi) |
12,000 |
| D790 |
Flexural Modulus (psi) |
400,000 |
| D695 |
Compressive Strength (psi) |
15,000 |
| D695 |
Compressive Modulus (psi) |
400,000 |
| D785 |
Hardness, Rockwell |
M88/R120 |
| D256 |
IZOD Notched Impact (ft-lb/in) |
1.0 |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F) |
5.40 |
| D648 |
Heat Deflection Temp (°F/°C) at 264 psi |
220/104 |
| D3418 |
Melting Temp (°F/°C) |
335/168 |
| - |
Max Operating Temp (°F/°C) |
180/82 |
| C177 |
Thermal Conductivity
(BTU-in/ft2-hr-°F)
(x 10-4 cal/cm-sec-°C) |
1.63
5.53 |
| UL94 |
Flammability Rating |
HB |
| ELECTRICAL |
| D149 |
Dielectric Strength (V/mil) short time, 1/8” thick |
420 |
| D150 |
Dielectric Constant at 1 MHz |
3.8 |
| D150 |
Dissipation Factor at 1 MHz |
0.005 |
| D257 |
Volume Resistivity (ohm-cm) at 50% RH |
1015 |
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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.
All values a 73°F (23°C) unless otherwise noted.
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