Overview
PPS SE-760 is a high-performance grade of polyphenylene sulfide (PPS), a semi-crystalline engineering thermoplastic. Developed for demanding industrial applications, it combines exceptional thermal stability (continuous use up to 220°C) with inherent flame retardancy (UL94 V-0 rating). The material's molecular structure features aromatic rings linked by sulfur atoms, providing rigidity and resistance to chemical attack. Unlike standard PPS grades, SE-760 is optimized for enhanced flow characteristics during injection molding while maintaining high mechanical strength.
Physical and Chemical Properties
PPS SE-760 exhibits a heat deflection temperature (HDT) of 260°C at 1.82 MPa, making it suitable for under-the-hood automotive applications. Its coefficient of linear thermal expansion is low (3-5 × 10^-5/°C), ensuring dimensional stability across temperature ranges. Chemically, it resists acids, bases, fuels, and most organic solvents below 200°C. The material maintains >85% of its tensile strength after 5000 hours at 200°C in air. Electrical properties include a dielectric strength of 16-18 kV/mm and volume resistivity >10^16 Ω·cm.
Main Applications
In automotive systems, PPS SE-760 is used for fuel system components (pump housings, valve bodies), ignition parts, and sensor housings due to its fuel resistance and thermal performance. Electrical applications include SMT connectors, coil bobbins, and switch components where high-temperature soldering resistance is required. Industrial uses encompass chemical process equipment (pump impellers, valve liners), food processing machinery parts, and aerospace components. Its FDA-compliant grades are suitable for repeated steam sterilization in medical devices.
Safety and Storage
While PPS SE-760 is thermally stable, processing above 320°C may release trace amounts of hydrogen sulfide. Adequate ventilation and fume extraction are recommended during injection molding or extrusion. Finished parts present minimal hazard under normal use conditions. Storage should maintain moisture content below 0.05% to prevent processing defects. Original packaging should remain sealed until use, with recommended shelf life of 24 months in dry conditions. Bulk storage requires nitrogen purging for extended periods.
B2B Procurement Guide
When sourcing PPS SE-760, specify required certifications (UL, FDA, RoHS) and color requirements. Standard grades typically include 30-40% glass fiber reinforcement; verify filler content matches application needs (mechanical vs. electrical focus). Lead times for specialty colors or custom formulations may extend to 8-12 weeks. For large-volume procurement (20+ metric tons), negotiate pricing tiers and consider regional production facilities to minimize logistics costs. Quality documentation should include batch-specific thermal and mechanical test reports.
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