PPS Ryton R-4: 40% Glass-Filled Polyphenylene Sulfide
Published: 2026-06-02
PPS Ryton R-4 (40% GF) for automotive under-hood. Inherently UL94 V-0 without additives. Survives continuous 200°C in air. High glass loading makes material abrasive — specify hardened tool steel.
PPS Ryton R-4 (40% GF) for automotive under-hood. Inherently UL94 V-0 without additives. Survives continuous 200°C in air. High glass loading makes material abrasive — specify hardened tool steel.
Technical Properties
| Density | 1.67 g/cm³ |
|---|---|
| Tensile Strength | 150 MPa |
| Melting Point | 285 °C |
| Shrinkage Rate | 0.2-0.4% |
| Flexural Modulus | 14 GPa |
| Hdt | 265 °C at 1.82 MPa |
Engineering Tool: Shrinkage & Cost Estimator
Calculate part weight, mold cavity dimensions accounting for shrinkage, and material cost — all locally in your browser.
Equivalents & Cross-References
| Equivalent / Alternate | Action |
|---|---|
| Ryton R-4 | |
| Fortron 1140L4 |
Frequently Asked Questions
Need flame retardant additives?
No. PPS is inherently UL94 V-0 at 0.8mm. Phenyl-sulfide linkage chars when exposed to flame, forming insulating layer.
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References & Industry Standards
- ASTM International. Standard Specifications for Engineering Plastics & Thermoplastics. astm.org
- UL Prospector. Plastics & Elastomers Material Database. ulprospector.com
- MatWeb. Material Property Data for Engineering Thermoplastics. matweb.com
- ISO 1043. Plastics — Symbols and Abbreviated Terms. iso.org