Acetal Homopolymer
Overview
What is the Material: Acetal Homopolymer Unfilled semi-crystalline material and it is the homopolymer version of acetal.
Key Material Features: This material is beneficial in applications requiring mechanical strength, rigidity, wear resistance, low moisture absorption, and dimensional stability.
Other Considerations: It is fitting in applications requiring slightly higher hardness and strength compared to acetal copolymer. This material has more prominent center-line porosity than acetal copolymer. Nylon materials typically perform better than acetal materials in abrasive wear applications.
Physical
| Property | Value | Typical ASTM Test |
|---|---|---|
| Chemical Designation | (POM-H) Polyoxymethylene Homopolymer | |
| Trade Names (®, ™) | Delrin, Sustarin H | |
| Color | Natual White, Black | |
| Density (g/cm^3) | 1.41 | D 792 |
Mechanical
| Property | Value | Typical ASTM Test |
|---|---|---|
| Modulus of Elasticity (Tensile Test) (psi) | 350000 | D 638 |
| Tensile Strength at Yield (psi) | 11000 | D 638 |
| Elongation at Break (%) | 25 | D 638 |
| Flexural Strength (psi) | 14000 | D 790 |
| Modulus of Elasticity (Flexural Test) (psi) | 420000 | D 790 |
| Compression Strength: 10% Strain (psi) | 15500 | D 695 |
| Compression Strength: 1% Strain (psi) | 3600 | D 695 |
| Compression Modulus (psi) | 325000 | D 695 |
| Impact Strength (Izod) (ft-lbs/in) | 1.5 | D 256 |
| Hardness (R) | 120 | D 785 |
| Hardness (M) | 94 | D 785 |
| Coefficient of Friction (Kinetic, 40 psi, 50 fpm) | 0.2 | D 3702 |
| Wear (K) Factor (in^3-min/ft-lbs-hr) (Against Steel, 40 psi, 50 fpm) | 5.50E-9 | D 3702 |
Thermal
| Property | Value | Typical ASTM Test |
|---|---|---|
| Melting Point (°F) | 347 | D 3418 |
| Deflection Temperature (°F) (66 psi) | 336 | D 648 |
| Deflection Temperature (°F) (264 psi) | 257 | D 648 |
| Service Temperature Continuous (°F) | 185 | |
| Service Temperature Intermittent (°F) | 300 | |
| Thermal Expansion (CLTE) (in/in/°F) | 6.80E-5 | D 696 |
| Specific Heat (BTU/lb-°F) | 0.35 |
Electrical
| Property | Value | Typical ASTM Test |
|---|---|---|
| Volume Resistivity (Ω*cm) | 1.00E15 | D 257 |
| Dielectric Strength (V/mil) | 500 | D 149 |
| Dissipation Factor (60 Hz) | 0.005 | D 150 |
| Dielectric Constant (60 Hz and 50% RH) | 3.7 | D 150 |
Other
| Property | Value | Typical ASTM Test |
|---|---|---|
| Moisture Absorption (%) (24 Hours) | 0.25 | D 570 |
| Moisture Absorption (%) (Saturated) | 0.9 | D 570 |
| Flammability | HB |
The data stated are typical values intended for reference and comparison purposes only. The data should not be used as a basis for design specifications or quality control. The information is provided as a guide to the best of our knowledge and given without obligation or liability. Testing under individual application circumstances is recommended.