POM-DuPont Delrin 100P
Enduring intense, repeated physical impact and long-term structural load in high-stress moving mechanisms requires ultimate toughness and creep resistance, which Delrin 100P by Delrin USA (formerly DuPont) delivers through its high-viscosity, high-molecular-weight homopolymer acetal matrix. Boasting a density of 1.42 g/cm³ and a low melt flow rate of 2.4 g/10 min, this unreinforced grade offers exceptional elongation at break (over 40%) and unmatched impact toughness (notched Charpy of 13 kJ/m²). At Jucheng Precision, an ISO 9001 and IATF 16949 certified contract manufacturer, we specialized in high-pressure molding of Delrin 100P. Backed by 35+ advanced injection presses and five-axis CNC-machined H13 tooling, we control its high crystallization shrinkage (1.8%-2.2%) and eliminate gas traps, delivering structurally flawless parts verified by Zeiss CMM.
Delrin 100P Toughness, Elongation, and Structural Modulus Profile
Delrin® 100P NC010 is a high-viscosity, unmodified acetal homopolymer. Due to its long polymer chain length, it offers the highest level of toughness, elongation, and fatigue endurance within the homopolymer acetal family:
| Mechanical Feature | Delrin 100P ASTM/ISO Spec | Dynamic Structural Advantage |
|---|---|---|
| Impact Toughness | Notched Charpy Impact 13 kJ/m² | Provides ultimate energy absorption under heavy impact, preventing structural breakage or fracture under low-temperature subzero environments. |
| Melt Viscosity Strength | MFR 2.4 g/10 min (190°C x 2.16kg) | High molecular weight polymer chain entanglement delivers exceptional melt strength, allowing for highly stable deep-draw wall packing. |
| Ductility & Elongation | Nominal Strain at Break 45% | Exhibits exceptional elasticity and ultimate elongation among homopolymer acetals, making it ideal for high-deflection snaps. |
Specialized Dynamic Process Configurations for Delrin 100P
With low melt flow and extreme polymer toughness, Delrin 100P is engineered to process reliably in high-stress tools:
| Molding Process | Molding Compatibility & Operational Details |
|---|---|
| Ultra-Tough Gears & Actuators | Excellent. The preferred choice for critical conveyor link pins, heavy-duty planetary gearboxes, heavy-torque wiper pivots, and winders. |
| Deep-Draw Snap-Fit Connectors | Excellent. Extreme yield strain and elongation-at-break prevent plastic fingers from shearing or whitening during manual dynamic assemblies. |
| Thick-Walled Structural Plates | Good. Excellent melt strength supports slow, progressive cavity filling to eliminate internal cooling voids on heavy-gauge sections. |
Delrin 100P Processing Matrix & Melt Control Checklist
Because Delrin 100P has high molecular weight, processing its low-melt-index resin requires precise gate geometries and high-capacity degassing:
1. Viscous Melt Delivery & Large Gates
With a low melt index of 2.4, Delrin 100P is highly viscous. Gates must be sized generously (minimum 70% of part wall thickness) and sprues polished to avoid dynamic pressure drops and high shear stress, which can cause surface splay and gate blush.
2. High-Capacity Mold Exhaust & Degassing
Formaldehyde outgassing occurs naturally. Low-MFR melts residing longer in the barrel require rapid air exhaust. Jucheng machines highly ventilated venting grooves (0.020mm) using premium S136 stainless steel mold cavity blocks to prevent gas burns.
3. Crystalline Shrinkage Compensation
Like standard POM-H, Delrin 100P shrinks heavily (1.80% to 2.20%). We employ Moldflow simulation to locate gate inputs strategically, applying progressive packing pressures to feed the center core and eliminate internal shrink voids.
4. High-Temp Oil Temperature Control
To optimize crystallinity and surface gloss, we keep mold temperatures at 80°C to 120°C (176°F to 248°F) using pressurized temperature controllers. Low mold temperatures prevent the crystalline phase from forming correctly, resulting in part warpage.
Key Application Fields for POM-DuPont Delrin 100P
- Heavy-Duty Automotive Interiors (IATF 16949): High-load door latch gear sets, window regulator slider brackets, dynamic seatbelt retractor components, and fluid sender systems.
- Industrial Dynamic Machinery: Heavy-load logistic conveyor links, industrial guide rails, high-fatigue spur gears, pulleys, and structural sliding pads.
- High-Compliance Medical Devices (ISO 13485): Dry-powder inhaler internal gear-slides, insulin pen sliding blocks, surgical instrument sliders, and dosing mechanisms.
Properties
| Density | 1.42 g/cm³ |
| Melt Mass-Flow Rate (MFR) (190°C/2.16kg) | 2.4 g/10 min |
| Tensile Modulus | 2,800 MPa |
| Tensile Stress at Yield | 67 MPa |
| Tensile Strain at Yield | 15 % |
| Nominal Strain at Break | 45 % |
| Flexural Modulus | 2,800 MPa |
| Flexural Strength | 76 MPa |
| Notched Charpy Impact Strength (23°C) | 13 kJ/m² |
| Melting Temperature | 178 °C |
| Vicat Softening Point (B/50) | 150 °C |
| Heat Deflection Temperature (HDT @ 1.80 MPa) | 100 °C |
| Linear Mold Shrinkage | 1.80 - 2.20 % |
| Maximum Part Size | 1000 x 800 mm |
| Minimum Part Size | 0.5 x 0.5 mm |