PPS Ryton R-4 XT: Extended-Toughness Glass Fiber Polymer for Automotive
Published: 2026-06-04
PPS Ryton R-4 XT is an extended-toughness variant of the standard R-4 grade, offering improved impact resistance (notched Izod ~95 J/m vs ~80 J/m for standard GF40 PPS) while maintaining the same high tensile strength, chemical resistance, and...
PPS Ryton R-4 XT is an extended-toughness variant of the standard R-4 grade, offering improved impact resistance (notched Izod ~95 J/m vs ~80 J/m for standard GF40 PPS) while maintaining the same high tensile strength, chemical resistance, and HDT. It is specified for automotive under-hood components subject to vibration and thermal cycling, where standard PPS's brittleness has historically been a limitation.
Technical Properties
| Density | 1.68 g/cm³ |
|---|---|
| Tensile Strength | 150 MPa |
| Melting Point | 285 °C |
| Shrinkage Rate | 0.2-0.3% |
| Flexural Modulus | 13 GPa |
| Hdt | 265 °C at 1.82 MPa |
| Continuous Service Temp | 220 °C |
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 |
|---|---|
| Solvay Ryton R-4 XT | |
| Fortron 1140L6 |
Frequently Asked Questions
By how much does R-4 XT improve impact resistance over standard PPS?
R-4 XT improves notched Izod impact by approximately 20% (95 vs 80 J/m) while maintaining tensile strength within 5% of standard R-4. The tradeoff is a slight reduction in flexural modulus (13 vs 14 GPa). This makes R-4 XT suitable for snap-fit connectors and vibration-loaded brackets where standard PPS would fracture.
Related Diagnostics & Materials
PEEK Polyetheretherketone: High-Performance Polymer...
Polyetheretherketone (PEEK) is a colorless organic thermoplastic polymer in the polyaryletherketone (PAEK) family,...
Ultem PEI (Polyetherimide): High-Temperature Amorphous...
Polyetherimide (PEI), best known by Sabic's trade name Ultem, is an amorphous high-performance thermoplastic...
PTFE Teflon: Ultimate Chemical Resistance & Low-Friction...
Polytetrafluoroethylene (PTFE), widely known by the trade name Teflon, is a fluoropolymer with the lowest...
PPS Ryton: Polyphenylene Sulfide High-Temp...
Polyphenylene sulfide (PPS), best known by Solvay's trade name Ryton, is a semicrystalline high-performance...
LCP Vectra: Liquid Crystal Polymer for Micro-Molding &...
Liquid Crystal Polymer (LCP), best known by Celanese's trade name Vectra, is a unique class of thermotropic...
Vespel Polyimide: Extreme-Temperature Polymer for...
Polyimide (PI), commercially known as DuPont Vespel, is the highest-temperature-rated polymer commercially...
PAI Torlon: Polyamide-Imide Extreme-Performance Polymer...
Polyamide-imide (PAI), commercially known as Solvay Torlon, occupies the performance space between PEEK and...
PES Veradel: Polyethersulfone Transparent High-Temp...
Polyethersulfone (PES), commercially known as Solvay Veradel or BASF Ultrason E, is an amorphous high-temperature...
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