Products

Engineered for demanding dry running applications, polyimide filled PTFE tube delivers exceptional wear resistance and dimensional stability. As a specialized polyimide PTFE tube manufacturer, we formulate custom compounds that combine virgin PTFE with a precisely controlled polyimide filler loading. The result is a tubing solution that outperforms standard PTFE in non-lubricated sliding environments. Our PI PTFE tubing low friction lineup reduces stick-slip behavior and protects mating components, while the PTFE tube with polyimide filler soft mating surface option is ideal for soft metal or plastic counterfaces. For engineers seeking a low wear PTFE tube PI filled product, this material offers a balanced combination of low coefficient of friction, high compressive strength, and extended service life.

Polyimide Filled PTFE Tube for Dry Running is manufactured through isostatic compression molding followed by precision machining or ram extrusion. The polyimide filler is uniformly dispersed to prevent localized wear and improve load-carrying capacity. This grade performs exceptionally well in reciprocating seals, rotary shaft bushings, valve stem guides, and linear bearings operating without external lubrication. The filled system also resists cold flow under load and reduces break-in wear by polishing the counterface during initial run-in. Key performance parameters and available options are summarized below.

• Filler content: 15% polyimide by weight (custom 5–25% available)
• Color: dark brown to black
• Density: 2.05–2.15 g/cm³
• Hardness: Shore D 62–66
• Tensile strength: ≥ 18 MPa
• Elongation at break: ≥ 180%
• Friction coefficient (dry): 0.08–0.12
• Operating temperature: -100°C to +260°C
• Maximum PV (dry): 0.8 MPa·m/s continuous
• Available dimensions: OD from 4 mm to 300 mm, wall thickness from 1 mm to 25 mm
• Standard lengths: 1000 mm, 2000 mm, or cut-to-length
• Machining tolerances: ±0.05 mm on ID/OD, ±0.10 mm on length
• Surface finish: Ra 0.8–1.6 µm on request