PEEK-Victrex PEEK 450G
Sostituire metalli pesanti come titanio, acciaio e alluminio in ambienti aerospaziali estremi e impiantabili richiede un polimero con una stabilità termica e chimica senza pari, che il PEEK 450G di Victrex offre attraverso la sua matrice in polietereeterchetone non modificata e ad alta viscosità. Con una temperatura di esercizio continuo di 260°C e un punto di fusione di 343°C, questo grado ad alte prestazioni offre un'eccezionale resistenza alla fatica, all'usura e un'insolubilità chimica quasi universale. Jucheng Precision, operando in conformità con i rigorosi quadri certificati ISO 9001, ISO 13485 e IATF 16949, è specializzata nello stampaggio del Victrex 450G. Supportati da cilindri in ceramica ad alta temperatura e controllori di riscaldamento dello stampo a olio pressurizzato, garantiamo un completo allineamento della fase semi-cristallina, fornendo componenti strutturali verificati tramite CMM Zeiss.
Victrex PEEK 450G Mechanical Strength & Thermal Limits
Victrex™ PEEK 450G is an unreinforced, medium-viscosity semi-crystalline polyetheretherketone resin, certified to deliver unmatched mechanical stiffness and continuous thermal resistance under ASTM/ISO standards:
| Proprietà ingegneristica | DAM Spec Value (ISO/ASTM) | Aerospace/Medical Advantage |
|---|---|---|
| Continuous Service Temp | 260 °C (UL 746B RTL Rating) | Maintains robust mechanical strength and prevents polymer creep under high heat, allowing for lightweighting of deep-downhole oil and aerospace brackets. |
| Modulo a flessione | 4,100 MPa (ISO 178) | Delivers extremely high mechanical stiffness and anti-deflection strength, ideal for structural wear rings and rotating gears. |
| Biocompatibility & Inertness | FDA & USP Class VI Compliant | Completely chemically inert, non-toxic, and resistant to repeated autoclave steam cycles, perfectly suited for surgical trial implants and dental healing caps. |
Extreme Environment Processing Targets for Victrex 450G
With its high viscosity and semi-crystalline chemistry, Victrex PEEK 450G requires high thermal energy profiling to mold successfully:
| Critical Operating Condition | Process Suitability & Design Focus |
|---|---|
| Structural Oil Seals & Thrust Washers | Excellent. Configured with high-temperature oil controllers to mold self-lubricating automotive washers, subsea connectors, and wear-resistant bushings. |
| Biocompatible Surgical Trial Implants | Excellent. Run inside our certified ISO Class 7/8 cleanrooms to mold highly complex orthopedic target caps and dental healing screws. |
| Under-the-Hood Sensor Bodies | Excellent. Well-suited for heavy-duty connector enclosures, smart-grid isolators, and aviation cable clamps requiring low outgassing. |
Victrex PEEK 450G High-Temperature Tooling Matrix
Molding an unreinforced, high-viscosity semi-crystalline polymer like PEEK 450G requires extreme thermal boundaries to secure proper crystalline development:
Riscaldamento dello stampo ad olio pressurizzato ad alta temperatura
To secure the proper semi-crystalline phase (giving PEEK its signature opaque beige color and stiffness), mold temperatures must be maintained continuously at 160°C–200°C (320°F to 392°F) using oil-heating controllers. Cold molds cause the melt to freeze amorphous, turning parts translucent brown and mechanically weak.
Hardened S136 Mirror-Polished Tooling
Due to the extreme clamping pressures and melt velocities of PEEK 450G, Jucheng’s tooling division uses hardened, corrosion-resistant S136 stainless steel molds. We heat-treat cavities to 52 HRC and design generous draft angles (minimum 1.5° to 2.0°) to ensure clean part release.
Ceramic Barrel Melt Management
Molding is processed between 360°C and 400°C (680°F to 752°F). Jucheng utilizes specialized, ceramic heater bands and bi-metallic barrels on our presses. Exceeding 420°C can result in chemical chain fracturing and polymer degradation.
Pre-essiccazione prolungata con essiccante
While PEEK absorbs minimal water, moisture causes hydrolytic splay and weld line degradation. We desiccant-dry PEEK 450G resin at 150°C (302°F) for 3–4 hours, keeping internal moisture below 0.02% to secure optimal molecular bonds.
Key Application Fields for PEEK-Victrex PEEK 450G
- Medical & Dental Technology (ISO 13485 Certified): Spinal fusion cages, temporary dental healing caps, orthopedic trial instruments, drug delivery cassettes, and surgical instrument parts.
- Aerospaziale e Infrastruttura Semiconduttori: Wafer carriers, chemical etching rings, vacuum chamber connectors, lightweight engine brackets, and high-frequency cable clamps.
- Gruppi propulsori e fluidi automobilistici (IATF 16949): Rondelle di spinta dinamiche ad alta usura, anelli di tenuta per cambi automatici, ingranaggi per colonna di sterzo e raccordi speciali per fluidi.
Proprietà
| Densità | 1,3 g/cm³ |
| Temperatura di fusione | 343 °C |
| Temperatura di transizione vetrosa (Tg) | 143 °C |
| Modulo a trazione | 3,700 - 3,800 MPa |
| Sforzo di Trazione allo Snervamento | 100 MPa |
| Deformazione a trazione allo snervamento | 5 % |
| Deformazione nominale a rottura | 45 % |
| Modulo a flessione | 4.100 MPa |
| Resistenza a flessione | 165 - 170 MPa |
| Resistenza all'urto Charpy con intaglio (23°C) | 5 kJ/m² |
| Resistenza all'urto con intaglio Izod (23°C) | 5.5 kJ/m² |
| Temperatura di distorsione al calore (HDT @ 1.80 MPa) | 152 °C |
| Ritiro da stampaggio lineare | 1.00 - 1.30 % |
| Dimensione massima del pezzo | 800 x 600 mm |
| Dimensione minima del pezzo | 0.5 x 0.5 mm |