Polyplastics DURACON M90-44 POM is a standard general-purpose acetal copolymer resin for injection molding, featuring low friction, superior wear resistance, and long-term dimensional stability.
| Manufacturer | Polyplastics |
|---|---|
| Density | 1.41 g/cm³ |
| MFR | 9.0 g/10min |
| MVR | 8.0 cm³/10 min |
| Flexural Modulus | 2500 MPa |
Note: See the product description for additional technical specifications
Polyplastics DURACON® M90-44 POM is a standard, general-purpose polyacetal copolymer (POM Copolymer) injection molding grade manufactured by Polyplastics Co., Ltd., a global leader in engineering plastics. Supplied as uniform natural white pellets, this high-performance acetal resin combines excellent mechanical strength, low friction, and long-term dimensional stability.
As one of the most widely specified standard POM grades in the global plastics industry, DURACON® M90-44 is engineered to deliver a well-balanced performance profile across a wide temperature range. It offers superior resistance to organic solvents, fuels, and strong alkalis, making it an ideal metal-replacement choice for precision mechanical parts, automotive components, and industrial gears requiring low wear, high fatigue endurance, and smooth molding performance.
| Properties | Test Conditions | Property Values | Units | Test Methods |
| Density | — | 1.41 | g/cm³ | ISO 1183 |
| Melt Flow Rate, Mass | 190 °C, 2.16 kg | 9 | g/10min | ISO 1133 |
| Melt Volume Rate, Volume | 190 °C, 2.16 kg | 8 | cm³/10min | ISO 1133 |
| Molding Shrinkage, Normal | 2 mm | 2.1 | % | ISO 294-4 |
| Molding Shrinkage, Parallel | 2 mm | 2.3 | % | ISO 294-4 |
| Water Absorption | 24 h, 23 °C | 0.5 | % | ISO 62 |
| Rockwell Hardness M | — | 80 | — | ISO 2039-2 |
| Properties | Test Conditions | Property Values | Units | Test Methods |
| Tensile Modulus | — | 2700 | MPa | ISO 527-1 |
| Tensile Stress | — | 62 | MPa | ISO 527-2 |
| Nominal Tensile Strain at Break | — | 35 | % | ISO 527-2 |
| Flexural Modulus | — | 2500 | MPa | ISO 178 |
| Flexural Strength | — | 87 | MPa | ISO 178 |
|
Coefficient of Friction, Dynamic
|
vs. M90-44 (Dynamic 0, 0.06 MPa, 15 cm/s) | 0.37 | — | JIS K7218 |
| vs. Steel (Dynamic 0, 0.98 MPa, 30 cm/s) | 0.4 | — | JIS K7218 | |
| vs. Steel (Dynamic 0, 0.49 MPa, 30 cm/s) | 0.46 | — | JIS K7218 | |
|
Wear Factor
|
0.49 MPa, Thrust 0, vs C-Steel 0, Steel Side 0, 0.3 m/s | < 1.0 | 10⁻⁸ mm³/(N·m) | JIS K7218 |
| 0.98 MPa, Thrust 0, vs C-Steel 0, Steel Side 0, 0.3 m/s | < 1.0 | 10⁻⁸ mm³/(N·m) | JIS K7218 | |
| 0.98 MPa, Thrust 0, vs C-Steel 0, Material Side 0, 0.3 m/s | 30 | 10⁻⁸ mm³/(N·m) | JIS K7218 | |
| 0.49 MPa, Thrust 0, vs C-Steel 0, Material Side 0, 0.3 m/s | 65 | 10⁻⁸ mm³/(N·m) | JIS K7218 | |
| Charpy Notched Impact Strength | 23 °C | 6 | kJ/m² | ISO 179 1eA |
| Properties | Test Conditions | Property Values | Units | Test Methods |
| Heat Deflection Temperature | 1.8 MPa, Unannealed | 95 | °C | ISO 75-2/A |
| Coefficient of Linear Thermal Expansion, Parallel | 23 – 55 °C | 1.20E-04 | cm/cm/°C | Internal Method |
| Coefficient of Linear Thermal Expansion, Normal | 23 – 55 °C | 1.20E-04 | cm/cm/°C | Internal Method |
| Flammability Rating | — | HB | — | UL 94 |
| Properties | Test Conditions | Property Values | Units | Test Methods |
| Surface Resistivity | — | 1.00E+16 | Ohms | IEC 60093 |
| Volume Resistivity | — | 1.00E+14 | ohms·cm | IEC 60093 |
| Electric Strength | 3 mm | 19 | kV/mm | IEC 60243-1 |
Notice:The technical data sheet (TDS) of DURACON® M90-44 POM material from Polyplastics corporation, if there are differences, please refer to the official website of Polyplastics.
Exceptional Friction & Wear Resistance: Features a low dynamic coefficient of friction (0.37–0.46) and excellent wear factors, ensuring smooth, silent operation in sliding components without requiring frequent lubrication.
Superior Chemical & Fuel Resistance: Outstanding resistance to organic solvents, greases, oils, fuels, and strong alkalis, preventing stress cracking in demanding chemical or automotive fluid environments.
High Mechanical Strength & Creep Resistance: Combines high tensile strength (62 MPa) and flexural modulus (2500 MPa) with long-term creep resistance, retaining dimensional integrity under continuous structural load.
Low Moisture Absorption & High Dimensional Stability: With a minimal 24-hour water absorption rate of just 0.5%, components molded from M90-44 maintain strict tolerances in humid operating conditions.
Excellent Processing Efficiency & Moldability: Formulated with a balanced melt flow rate (MFR 9.0 g/10min), facilitating fast cycle times, easy mold release, and minimal flash during mass injection molding.
Automotive Industry: Fuel system components (fuel pump housings, tank valves), door lock mechanisms, window regulator gears, seatbelt retractor parts, and wiper arm clips.
Precision Mechanical Components: Industrial gears, bearings, cams, conveyor belt links, rollers, pulleys, and precision bushings requiring low friction and long service life.
Consumer Electronics & Appliances: Internal gears for printers and copiers, washing machine valve components, coffee machine water valves, power tool housings, and audio/video tape drive gears.
Plumbing & Sanitary Fittings: Showerhead internal components, faucet cartridges, water meter housings, and valve stems exposed to continuous hot and cold water contact.
Industrial & General Hardware: Zippers, fasteners, toy mechanisms, conveyor chains, and office chair adjustment components requiring high wear resistance.
Q1: What are the recommended drying conditions for DURACON® M90-44 before injection molding?
A1: Although POM absorbs very little moisture (0.5%), pre-drying is strongly recommended if the resin pellets have been exposed to high humidity or stored for extended periods. The optimal drying condition is 80–90 °C for 3–4 hours using a hot-air or desiccant dryer. Overdrying above 100 °C or for more than 8 hours should be avoided to prevent thermal discoloration.
Q2: How does POM Copolymer (DURACON® M90-44) compare to POM Homopolymer (such as Delrin®)?
A2: POM Copolymer (DURACON® M90-44) exhibits higher thermal stability, lower mold deposit formation during long molding runs, superior resistance to strong alkalis, and reduced risk of central porosity in thick parts. In contrast, POM Homopolymer generally offers slightly higher short-term tensile strength and stiffness but is more susceptible to thermal degradation and alkaline attack.
Q3: Does Polyplastics DURACON® M90-44 comply with RoHS and UL environmental/safety standards?
A3: Yes. DURACON® M90-44 complies with EU RoHS (Directive 2011/65/EU) and REACH regulations, containing no heavy metals or restricted phthalates. Additionally, it carries a UL 94 HB flammability rating (File No. E45574). Specific batch-related REACH/RoHS compliance declarations and UL Yellow Cards are available upon request from our technical sales team.
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