Written by Alex Zhang
Technical Director at Skyjet Polymer – 18 years doing nothing but high-performance plastics
Last month alone we had 42 incoming calls and emails that all started with the exact same question:
“Hey Alex, my application is… Should I use PTFE, UHMWPE or PEEK?”
Instead of explaining the same thing 42 times, I decided to take the actual internal comparison table I use with our European and US customers every day and turn it into this no-BS guide.
Straight-to-the-point Performance Comparison (2025 real lab data from our factory)
| Property | Virgin PTFE | Ram-Extruded UHMWPE (9.2 million MW) | PEEK 450G / CA30 | Clear Winner for… |
|---|---|---|---|---|
| Continuous service temperature | 260 °C | 80–90 °C | 260 °C (peaks to 310 °C) | PEEK ≈ PTFE |
| Low-temperature toughness | –200 °C | –269 °C (liquid-nitrogen proof) | –60 °C | UHMWPE by a mile |
| Coefficient of friction (dry vs steel) | 0.04–0.10 (lowest on earth) | 0.08–0.14 | 0.30–0.40 | PTFE |
| Abrasion resistance (sand-slurry) | Decent | Best plastic on the planet | Very good (CA30 even better) | UHMWPE > PEEK > PTFE |
| Impact strength | Brittle | You literally can’t break it | Excellent | UHMWPE > PEEK >> PTFE |
| Chemical resistance | Nearly universal | Great except strong oxidizers | Excellent up to ~200 °C | PTFE > PEEK > UHMWPE |
| FDA / Medical approval | Yes | Yes | Yes (most grades) | All three |
| Ease of machining | Super easy | Easy | Hard (gummy & scratches) | PTFE = UHMWPE > PEEK |
| 2025 bulk price (USD/kg) | 12–18 | 7–12 | 80–150 | UHMWPE wins on budget |
My 5 Hard Rules – When I Force Customers to Pick One
- If continuous temperature > 120 °C and you still need strength → PEEK or PTFE only
UHMWPE softens and creeps above 100 °C. End of story. - Lowest possible friction + aggressive chemicals → PTFE, close your eyes
Strong acids, alkalis, solvents, semiconductor wet benches, food-grade non-stick belts — nothing else survives. - Heavy abrasion + impact + big parts + you don’t want to spend a fortune → Ram-extruded 9.2 M UHMWPE
This is our cash-cow product line: marine fender pads, mining truck liners, slaughterhouse scraper blades, crane outrigger pads… parts that last 8–12 years instead of 2–3.
(Most “UHMWPE” on the market is screw-extruded 3–5 million MW and loses 30–40 % wear life. We don’t play that game.) - Metal replacement + load-bearing at 150–250 °C → PEEK is the only answer
Aerospace bushings, semiconductor CMP rings, oil & gas valve seats in H2S, automotive transmission thrust washers, spinal implants — yes it’s expensive, but total cost of ownership is usually lower than 17-4PH or 440C stainless. - Food-contact OR cryogenic service → UHMWPE or PTFE
Liquid-nitrogen valves, frozen-food cutting boards — only these two stay tough below –100 °C.
The 2-Minute Decision Tree I Actually Use on Calls
- Temp > 120 °C continuously? → PEEK or PTFE
- Need insane chemical resistance + ultra-low friction? → PTFE
- Heavy wear + impact + large thick parts + budget matters? → Ram-extruded UHMWPE
- Replacing metal at elevated temperature? → PEEK
- Special certifications (USP Class VI, NORSOK M-710, fire-safe)? → Talk to me
90 % of projects are decided in under two minutes with this flow.
Why We Can Supply All Three at Real OEM Quality
- PTFE: 8 compression presses + 5 ram/skiving lines, 60 tons/month capacity
- UHMWPE: Three original German ram extruders running only GUR 4150/4170 → genuine 9+ million MW with Celanese certificates + our own GPC reports
- PEEK: Victrex-authorised stockist + 20 Haas 4/5-axis CNCs, tolerances down to ±0.01 mm
Send me a drawing and I’ll tell you the same day which material actually makes economic sense.
Want Me to Pick for You?
Just reply with these five lines (copy-paste is fine):
- Max / min / continuous temperature
- Chemicals or media in contact
- Type of load (sliding, impact, static)
- Approx. annual volume
- Any must-have certifications
I’ll get back within one working day with material recommendation + firm quote.
Any questions — Please contact: info@skyjetpolymer.com or WhatsApp me: +86 13338193386
Skyjet Polymer
Making parts that actually last 30+ years since 1993. Skyjet Polymer can assist you in selecting high-performance polymers such as PTFE, UHMWPE, and PEEK.
Looking forward to solving your next headache.
Alex