PPSU
PPSU is an amorphus material, with high glass transition temperature and low moisture absorption.
- Common grades
- Radel R-5000 series · Medical / bio-compatible grades
- Machinability
- PPSU's claim to fame is surviving repeated steam sterilization: it withstands over a thousand autoclave cycles without crazing or losing toughness, which is why it dominates reusable medical instrument parts, sterilizat…
- Tolerances
- Agreed per grade at DFM: engineering plastics move with temperature and moisture, so critical fits are toleranced feature by feature
- Processes
- CNC milling, CNC turning and 5-axis machining
- Finishes
- Machined finish · Annealing · Bead blasting
- Used in
- Medical, Semiconductor
- Certification
- Manufacturer certificate of conformance and lot traceability with every shipment
Machining PPSU
PPSU's claim to fame is surviving repeated steam sterilization: it withstands over a thousand autoclave cycles without crazing or losing toughness, which is why it dominates reusable medical instrument parts, sterilization trays and dental components.
It combines high heat resistance (continuous use around 180 °C) with the highest impact strength of the sulfone family, and it machines cleanly with sharp tooling and modest speeds. Annealing before final machining prevents later stress cracking around machined features.
We machine PPSU to ±0.05 mm on critical features and can machine and assemble in our cleanrooms where medical hygiene requirements apply.
Common Grades We Machine
- Radel R-5000 series - The standard unfilled PPSU for medical and precision engineering machining.
- Medical / bio-compatible grades - Certified grades for repeated-sterilization instrument applications, sourced with documentation.
Applications by Industry
- Medical - sterilizable instrument handles, trays and housings that endure autoclave service.
- Semiconductor - fluidic manifolds and high-purity handling components needing chemical resistance.
Surface Finishing Options
- Machined finish - clean, sealed surfaces suitable for sterilization.
- Annealing - stress relief that prevents crazing after repeated autoclave cycles.
- Bead blasting - a uniform satin surface for grip and appearance.
See our surface finishing services for the full range.
Frequently Asked Questions
Why choose PPSU over polycarbonate or PEI?
Repeated steam sterilization: PC crazes and PEI grows brittle after enough autoclave cycles, while PPSU keeps its toughness past a thousand. If autoclaving is in the product's life, PPSU is the safe answer.
Does PPSU need stress relief?
Yes. we anneal before final machining so machined features don't become crack-initiation sites under sterilization stress.
Can you supply material documentation for medical use?
Yes. we source certified grades and ship parts with full material traceability to support your device documentation.
Precision PPSU Manufacturing in Singapore
Need complex PPSU parts manufactured to tight tolerances? Explore our 5-axis simultaneous CNC machining, CNC milling, CNC turning and certified ISO Class 6–8 cleanroom assembly capabilities.
Speak with Our Sales & Engineering Team
Explore how Shine's Singapore precision CNC machining and cleanroom assembly integrate into your global supply chain. We welcome technical consultations, mutual NDAs, and facility audits.
- Mutual NDA executed within 24 hours
- ISO 9001:2015 certified & Cyber Essentials mark
- 24–48h engineering DFM feedback & formal RFQ pricing