PPS-Toray Torelina A504FG
Substituting heavy brass and die-cast aluminum in modern high-temperature automotive cooling systems and dynamic pump assemblies without compromising dimensional stability requires an elite composite, which Toray’s TORELINA™ A504FG delivers. This 40% glass fiber reinforced polyphenylene sulfide (PPS-GF40) grade provides an exceptional tensile modulus of 14,500 MPa and an extreme heat deflection temperature (HDT) of 265°C, ensuring near-zero thermal expansion under load. Jucheng Precision, operating under IATF 16949 and ISO 9001 quality systems, specializes in high-precision injection molding of Torelina A504FG. Supported by five-axis CNC-machined H13 steel toolings, we manage its low-viscosity flash tendencies (parting line gaps under 0.005mm) and prevent floating fibers, ensuring structurally flawless components verified by Zeiss CMM.
Torelina A504FG Structural Mechanics & Thermal Limits
TORELINA™ A504FG is a 40% glass fiber reinforced semi-crystalline Polyphenylene Sulfide (PPS-GF40) resin engineered by Toray, certified to deliver unmatched mechanical stiffness, dimensional repeatability, and exceptional thermal limits under ISO/ASTM standards:
| Physical & Mechanical Parameter | Torelina A504FG Nominal Spec | Metal-Substitution Advantage |
|---|---|---|
| Structural Rigidity | Tensile Modulus 14,500 MPa / Strength 195 MPa | Delivers extraordinary, metal-matching modulus at a low density (1.66 g/cm³), enabling massive weight-savings over brass and zinc castings. |
| Heat Deflection (HDT) | 265 °C (DAM @ 1.80 MPa) | Ensures absolute dimensional stability and unyielding structural integrity under extreme continuous temperatures and dynamic load profiles. |
| Crystalline Shrinkage | Linear Shrinkage 0.18% (Flow Direction) | Provides exceptionally low, isotropic post-molding shrinkage, preventing part twisting and securing flat, tight-tolerance sealing faces. |
Structural Component Process Configurations for Torelina A504FG
With its high-flow melt performance and low mold shrinkage, Torelina A504FG processes consistently inside precise cavities:
| Molding Technology Class | Process Compatibility & Operational Details |
|---|---|
| Automotive Cooling & Water Pumps | Excellent. Configured with pressurized oil heating to mold water pump impellers, thermostat housings, and engine coolant connections with high weld-strength. |
| Chemical-Resistant Fluid Valves | Excellent. Highly optimized for chemical spray nozzles, hot water mixing valves, gas flow meters, and high-pressure gaskets with extreme solvent resistance. |
| High-Precision Electronics | Good. Outstanding dimensional stability, low outgassing, and excellent high-temperature creep resistance prevent structural distortion in SMT connectors. |
High-Temp Crystallization & Flash Prevention Matrix
Molding an ultra-high heat resistant, 40% glass-fiber reinforced PPS like Torelina A504FG requires strict mold temperature control and abrasive-wear prevention:
Micron-Level Flash Control (Tooling Precision)
Because Torelina A504FG exhibits extreme flowability (low viscosity) during peak standard molding at 310°C, molten resin can seep easily into minor mold gaps, causing parting line flash. 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.
Managing High Fiber Abrasive Wear
40% short glass fibers act as an abrasive medium under high injection speeds. Jucheng’s tooling division prevents cavity erosion by constructing molds with premium hardened tool steel (H13) heat-treated to 50–52 HRC and mirror-polished, ensuring long-term parting line precision and flash-free parts.
Oil-Heated Mold Temperature Matrix (Crystallization)
We maintain mold temperatures at 130°C–150°C (266°F to 302°F) using pressurized oil temperature controllers. High mold temperatures maximize surface gloss, reduce weld lines, and prevent surface glass-fibers from floating, ensuring a smooth and non-fibrous finish.
Pre-Drying & Outgassing Venting
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%. Precise venting slots (0.015mm depth) are cut along parting lines to exhaust gas during high-melt runs.
Key Application Fields for PPS-Toray Torelina A504FG
- Automotive Powertrains & Chassis (IATF 16949): High-pressure water pump impellers, thermostat housings, radiator end chambers, oil separator covers, and engine coolant connections.
- Industrial plumbing & Fluid Systems: Boiler water mixing valves, chemical spray nozzles, household faucet combination valves, water meters, and high-pressure pipe couplings.
- Electrical, Office & SMT Connectors: High-density SMT connectors, electrical relays, smart power meters, high-voltage circuit breakers, and printer gear assemblies.
Properties
| Density | 1.66 g/cm³ |
| Tensile Strength (DAM) | 195 MPa |
| Tensile Elongation at Break (DAM) | 1.9 % |
| Tensile Modulus (DAM) | 14,500 MPa |
| Flexural Strength (DAM) | 285 MPa |
| Flexural Modulus (DAM) | 14,000 MPa |
| Charpy Notched Impact Strength (23°C) | 11 kJ/m² |
| Melting Temperature | 282 °C |
| Heat Deflection Temperature (HDT @ 1.80 MPa) | 265 °C |
| Linear Thermal Expansion (Flow Direction) | 1.3E-5 cm/cm/°C |
| Linear Mold Shrinkage (Flow Direction) | 0.18 % |
| Linear Mold Shrinkage (Cross Direction) | 0.45 % |
| Volume Resistivity | 1.0E+16 Ohm-cm |
| Maximum Part Size | 800 x 600 mm |
| Minimum Part Size | 1 x 1 mm |