Short answer: choose PTFE for temperature above ~90°C, universal chemical exposure, low friction or electrical insulation; choose UHMW-PE for abrasion-dominated service below 80°C where cost matters — UHMW-PE out-wears PTFE several times over and costs a fraction. They overlap only in a narrow band of room-temperature, mild-chemical, sliding applications, where UHMW-PE usually wins on wear and price.
These two plastics get compared because both slide and both resist chemicals, but they are engineered for different failures. The honest comparison is organized by which property your part actually needs to survive — temperature, wear, chemicals, friction or dielectrics.
Head-to-head on the properties that matter
| Propriété | PTFE | UHMW-PE |
|---|---|---|
| Max continuous temperature | ~260°C | ~80°C (softens well below PTFE) |
| Chemical resistance | Near-universal | Excellent for acids/alkalis; poor against some hydrocarbons and oxidizers |
| Abrasion resistance | Poor–fair (the weak point) | Remarquable — among the best of plastics |
| Friction coefficient | ~0.05–0.10 (lowest known) | ~0.10–0.20 |
| Cold flow / creep | High (needs fillers) | Moderate; better load behavior than virgin PTFE |
| Dielectric strength | Excellent, stable across temperature | Good at room temperature only |
| Food contact | FDA grades standard | FDA grades common |
| Relative cost | Higher | Lower |
Selection by failure mode
- Part wore out: UHMW-PE. Wear rails, chute liners, guide strips — its abrasion life is many times PTFE’s. Filled PTFE (bronze, glass) narrows the gap but rarely closes it.
- Part is hot: PTFE, without contest above 90°C.
- Part carries load and creeps: neither virgin PTFE nor UHMW-PE at high temperature; filled PTFE or other engineering plastics enter the conversation.
- Electrical insulation at temperature: PTFE — UHMW-PE’s dielectrics degrade with heat.
- Non-stick surface: PTFE’s release behavior is unmatched; UHMW-PE is slippery but sticky materials still adhere.
The one band where the choice is genuinely close
Room-temperature sliding parts in mild chemistry — wear pads, slide strips, low-load bushings. Here UHMW-PE usually wins on wear and cost; PTFE wins when friction must be minimal or loads are compressive and creep matters. Filled PTFE grades (bronze, glass) shift the comparison further toward PTFE for load, at added cost. Chunhuan manufactures PTFE sheet and filled grades and can provide comparative data against UHMW-PE for a specific duty — wear, creep and friction behave differently at your temperature than on any datasheet row.
Frequently Asked Questions
Is UHMW-PE cheaper than PTFE?
Generally yes, meaningfully so. For room-temperature abrasion service without special requirements, UHMW-PE usually delivers longer wear life at lower cost.
Which has better friction, PTFE or UHMW-PE?
PTFE, at roughly 0.05-0.10 coefficient — the lowest of any solid. UHMW-PE runs about 0.10-0.20.
Can UHMW-PE replace PTFE in chemical applications?
Only below ~80°C and after checking the specific media: UHMW-PE resists acids and alkalis well but some hydrocarbons and oxidizers attack it. PTFE is near-universal.
Which material wears better?
UHMW-PE, by a wide margin in abrasion-dominated service. PTFE’s weakness is wear; filled grades improve it but rarely match UHMW-PE.
English
Russian
French
Spanish