POM-DuPont Delrin 100P
Resistere a impatti fisici intensi e ripetuti e a carichi strutturali a lungo termine in meccanismi mobili ad alto stress richiede tenacità e resistenza al creep estreme, che Delrin 100P di Delrin USA (ex DuPont) offre grazie alla sua matrice acetale omopolimero ad alta viscosità e alto peso molecolare. Con una densità di 1,42 g/cm³ e un basso indice di fluidità di 2,4 g/10 min, questo grado non rinforzato offre un eccezionale allungamento a rottura (oltre il 40%) e una tenacità all'urto senza pari (Charpy con intaglio di 13 kJ/m²). Presso Jucheng Precision, produttore a contratto certificato ISO 9001 e IATF 16949, siamo specializzati nello stampaggio ad alta pressione di Delrin 100P. Supportati da oltre 35 presse a iniezione avanzate e attrezzature H13 lavorate con CNC a 5 assi, controlliamo il suo elevato ritiro di cristallizzazione (1,8%-2,2%) ed eliminiamo le sacche di gas, fornendo parti strutturalmente impeccabili verificate tramite CMM Zeiss.
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 |
|---|---|---|
| Tenacità all'impatto | 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:
| Processo di stampaggio | Compatibilità di stampaggio e dettagli operativi |
|---|---|
| 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.
- Macchinari dinamici industriali: 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.
Proprietà
| Densità | 1.42 g/cm³ |
| Indice di fluidità a caldo (MFR) (190°C/2,16 kg) | 2.4 g/10 min |
| Modulo a trazione | 2.800 MPa |
| Sforzo di Trazione allo Snervamento | 67 MPa |
| Deformazione a trazione allo snervamento | 15 % |
| Deformazione nominale a rottura | 45 % |
| Modulo a flessione | 2.800 MPa |
| Resistenza a flessione | 76 MPa |
| Resistenza all'Impatto Charpy con Intaglio (23°C) | 13 kJ/m² |
| Temperatura di fusione | 178 °C |
| Punto di Rammollimento Vicat (B/50) | 150 °C |
| Temperatura di distorsione al calore (HDT @ 1.80 MPa) | 100 °C |
| Ritiro da stampaggio lineare | 1.80 - 2.20 % |
| Dimensione massima del pezzo | 1000 x 800 mm |
| Dimensione minima del pezzo | 0.5 x 0.5 mm |