POM-Polyplastics Duracon M90-44
Maintaining a perfect equilibrium between long-term sliding wear resistance and high dimensional stability in high-tolerance kinematics requires a highly balanced acetal copolymer, which Polyplastics' Duracon M90-44 delivers. Boasting a density of 1.41 g/cm³ and a stable melt index of 9.0 g/10 min, this standard grade is globally recognized for its exceptional friction properties, low wear factor, and creep resistance. Jucheng Precision, under IATF 16949 and ISO 9001 frameworks, specializes in molding Duracon M90-44 for complex automotive and consumer assemblies. Using our 5-axis CNC-machined S136 tool cavities and 35+ advanced presses, we control its 1.8% to 2.2% shrinkage, delivering zero-defect gears verified by Zeiss CMM.
Duracon M90-44 Copolymer Mechanical & Tribological Profile
DURACON® M90-44 is the global standard acetal copolymer (POM-C) resin engineered by Polyplastics, optimized to deliver exceptional friction properties, low wear, and stable dimensional repeatability:
| Dynamic Attribute | Duracon M90-44 Rated Spec | Operational Mechanism Advantage |
|---|---|---|
| Low Friction Sliding | Dynamic Friction Coefficient 0.46 | Demonstrates exceptional self-lubricating sliding performance against carbon steel, preventing heat buildup and squeak in dry dynamic contacts. |
| Structural Toughness | Tensile Modulus 2700 MPa / Strength 62 MPa | Ensures a highly balanced combination of mechanical rigidity and elongation, resisting high-torque snap-fit shear forces. |
| Dimensional Recovery | Water Absorption 0.5% (23°C/24h) | Maintains excellent, repeatable dimensions under humid operating environments, preventing gear teeth swelling and operational jamming. |
Structural Kinematic Process Compatibility for Duracon M90-44
With its balanced melt viscosity and crystallization rate, Duracon M90-44 supports high-stiffness micro-features:
| Molding Process | Operational Compatibility & Details |
|---|---|
| Precision Dynamic Slides & Guides | Excellent. The primary process for Duracon M90-44. Ideal for helical gears, sliding block guides, structural cams, and silent printer rollers. |
| Self-Coloring Consumer Housings | Excellent. Highly compatible with masterbatch color additives, providing rich, vibrant surface coloration for dynamic hand tools and toys. |
| Multi-Cavity Automotive Runs | Excellent. Moderate flowability (MFR 9) supports continuous injection molding cycles with extremely tight batch-to-batch dimensional stability. |
POM-Polyplastics Duracon M90-44 Blueprint
Molding a standard copolymer resin like Duracon M90-44 requires precise mold cooling to manage isotropic shrinkage, alongside corrosion-resistant tool face designs:
S136 Hardened Steel Core
At melt temperatures, POM copolymers release minor formaldehyde outgassing. Jucheng’s tooling division uses hardened, corrosion-resistant S136 stainless steel molds and machines highly ventilated vents (0.015mm to 0.020mm) to prevent mold face corrosion and secure clean parting lines.
Crystalline Shrinkage Compensation
Duracon M90-44 exhibits high, isotropic shrinkage (typically 1.80% to 2.20%). We employ conformal cooling loops machined on our 5-axis CNCs directly into core block inserts, ensuring uniform heat dissipation across deep rib gates to prevent warpage and shrink voids.
Key Application Fields for POM-Polyplastics Duracon M90-44
- Automotive Sealing & Kinematics (IATF 16949): Window regulator slider blocks, door latch gear sets, seatbelt pretensioner slider tracks, windshield wiper pivots, and fuel level sender caps.
- Precision Mechanical Hardware: Helical gears for office printers, conveyor belt rollers, sliding track guides, chemical spray nozzles, and household water faucet valves.
- Consumer & Furniture Commodities: Snapping furniture fasteners, dynamic plastic zippers, toy vehicle gearboxes, cosmetic container caps, and heavy-duty structural clips.
Properties
| Density | 1.41 g/cm³ |
| Melt Mass-Flow Rate (MFR) (190°C/2.16kg) | 9 g/10 min |
| Melt Volume-Flow Rate (MVR) (190°C/2.16kg) | 8 cm³/10min |
| Tensile Strength at Yield | 62 MPa |
| Nominal Strain at Break | 35 % |
| Tensile Modulus | 2,700 MPa |
| Flexural Strength | 87 MPa |
| Flexural Modulus | 2,500 MPa |
| Charpy Notched Impact Strength (23°C) | 6 kJ/m² |
| Dynamic Friction Coefficient (vs C-Steel) | 0.46 - |
| Rockwell Hardness (M-Scale) | 80 - |
| Melting Temperature | 165 °C |
| Heat Deflection Temperature (HDT @ 1.80 MPa) | 95 °C |
| Linear Mold Shrinkage | 1.80 - 2.20 % |
| Maximum Part Size | 1000 x 800 mm |
| Minimum Part Size (Micro Gear limit) | 0.5 x 0.5 mm |