PPS-Celanese Fortron 1140L4
Para microeletrônica de alta densidade e componentes SMT que devem suportar temperaturas de soldagem por refluxo sem chumbo de até 260°C sem desvio dimensional, o Fortron 1140L4 da Celanese fornece uma solução revolucionária. Este grau de PPS linear reforçado com fibra de vidro 40% é formulado de forma única para minimizar os defeitos de rebarbas comuns em polímeros altamente fluidos, oferecendo excepcionalmente baixa viscosidade de fusão e alta resistência de solda estrutural. Na Jucheng Precision, uma instalação certificada ISO 9001 e IATF 16949, somos especializados em moldagem de alta precisão do Fortron 1140L4. Apoiados por mais de 35 prensas de injeção avançadas e moldes de aço inoxidável S136 usinados por CNC de cinco eixos, controlamos sua contração anisotrópica (0,15%-0,5%) e gerenciamos a desgaseificação volátil, entregando componentes sem defeitos verificados por CMM Zeiss.
Fortron 1140L4 Low-Flash Performance & Structural Profile
Fortron® 1140L4 is a 40% glass fiber reinforced, linear polyphenylene sulfide (PPS) grade engineered by Celanese, specifically designed to minimize flash defects during high-volume precision runs:
| Material Property | Measured Value (ISO/ASTM) | Engineering Impact |
|---|---|---|
| Low-Flash Chemistry | Patented Linear Matrix Control | Specially formulated to drastically suppress typical PPS flashing on mold parting lines, reducing secondary deflashing processes. |
| Rigidez Extrema | Tensile Modulus 14,500 MPa | Provides exceptional high-stiffness, unyielding structural support for heavy-duty EV battery connectors and microelectronic frames. |
| Thermal Stability | HDT @ 1.80 MPa: 270 °C | Withstands uncompromised mechanical load and shape retention under continuous high heat, ideal for Lead-free Reflow (SMT) processes. |
Thin-Walled Component Process Suitability for Fortron 1140L4
With outstanding melt fluidity and linear macromolecular weight, Fortron 1140L4 processes beautifully inside complex dynamic components:
| Categoria do Componente | Foco no Processo de Moldagem |
|---|---|
| Thin-Wall Electronic Sockets | Excellent. The primary process for Fortron 1140L4. Optimized for high-density, thin-walled micro-connectors, chip carriers, and relays. |
| High-Load Automotive Sensors | Excellent. Highly compatible with metal terminals, allowing encapsulation of multiple sensor pins directly within highly rigid PPS housings. |
| Chemical Water-Pump Impellers | Good. Outstanding dimensional stability, low water absorption, and excellent hot water resistance prevent structural distortion. |
Molding Analysis: Fortron 1140L4 Dynamic Heat Control and Venting Blueprint
Molding a low-flash linear 40% glass-fiber reinforced PPS like Fortron 1140L4 requires precise melt temperature controls and optimized venting to prevent outgassing:
Precision Parting Line Control (Tooling Tolerance)
Even though Fortron 1140L4 is custom-formulated to reduce flashing compared to typical PPS grades, its highly fluid nature still requires highly precise tool shut-offs. Jucheng’s tooling division uses 5-axis CNC machines to achieve micro-tolerances, keeping mold parting clearances strictly within 0.005mm on premium S136 stainless steel mold cavity blocks hardened to 48–52 HRC.
Oil-Heated Mold Temperature Matrix
Pressurized oil heaters are mandatory to keep mold temperatures at 135°C–150°C (275°F to 302°F). Low mold temperatures prevent the optimal semi-crystalline phase from forming, which severely degrades mechanical strength, chemical resistance, and dimensional stability over time.
Deep Outgassing Venting Slots
To prevent gas-induced diesel burn marks and short shots, we machine deep, strategically positioned venting channels (0.015mm depth) on the mold parting lines. This secures clean, blemish-free parts on multi-cavity runs.
Hygroscopic Pre-Drying Protocol
We dry raw resin in desiccant hopper dryers at 120°C–140°C (248°F–284°F) for 3–4 hours. This eliminates surface splay and prevents weld-line micro-voids, keeping internal moisture strictly below 0.02% to secure optimal molecular bonds.
Key Application Fields for PPS-Celanese Fortron 1140L4
- Electrical, Office & Printers: High-density micro-connectors, SMT-compatible chip bobbins, micro-switches, relay sockets, copier fuser units, and printer gears.
- Automotive Powertrains & Fluids (IATF 16949): High-pressure water pump impellers, thermostat housings, heater valves, cooling fluid pipes, throttle bodies, and fuel injection systems.
- Fluid Handling, Plumbing & Industrial: Boiler water mixing valves, chemical spray nozzles, household faucet combination valves, and high-pressure hot-water couplers.
Propriedades
| Densidade | 1.65 g/cm³ |
| Módulo de Tração (DAM) | 14.500 MPa |
| Tensão de Tração na Ruptura (DAM) | 195 MPa |
| Alongamento na Ruptura (DAM) | 1.6 % |
| Resistência à Flexão | 285 MPa |
| Módulo de Flexão | 14.000 MPa |
| Resistência ao Impacto Charpy com Entalhe (23°C) | 9 kJ/m² |
| Temperatura de Fusão | 280 °C |
| Temperatura de Deflexão Térmica (HDT @ 1,80 MPa) | 270 °C |
| Contração Linear no Molde (Direção do Fluxo) | 0.15 - 0.25 °C |
| Contração Linear no Molde (Direção Transversal) | 0.35 - 0.50 % |
| Resistividade de Volume | 1.0E+16 % |
| Tamanho Máximo da Peça | 800 x 600 mm |
| Tamanho Mínimo da Peça | 1 x 1 mm |