PTFE (polytetrafluoroethylene) provides a lubricious inner layer ideal for catheter applications that require low friction. Our PTFE liners are fabricated using the same film-coat process used for polyimide tubing, which creates very thin walls.
Film-Coat PTFE Liner Tubing
What makes our PTFE liners different? We provide them on silver-plated, copper-core mandrels, so you don't have to stretch the liner onto another mandrel. This allows you to:
- Design thinner walls
- Maintain precise IDs
- Reduce assembly time
- Reduce risk of adhesion issues
Removing the Mandrel
Our silver-plated, copper-core mandrels stay in place through the entire catheter assembly process. Our mandrels are malleable, which makes them easy to remove. When your catheter is complete, simply pull the ends of the mandrel outward to reduce the diameter, and your PTFE-lined catheter assembly will slide off.
Properties of PTFE
PTFE has the lowest coefficient of friction of any polymer, making it a popular choice for catheter applications that require lubricity. It also features:
- Temperature and chemical resistance
- Precise tolerances
- High dielectric strength
- Excellent insulative properties
Strike Layer Enhances Adhesion
Our PTFE liners on mandrels can be fabricated with a thin thermoplastic outer layer to enhance adhesion. This "strike layer" adds up to 60% more bond strength between the etched PTFE surface and the catheter assembly. Strike layers are available in a wide range of thermoplastic materials, including:
- Nylon (11 and 12)
- Pebax® (55D, 70D and 72D)
- Polyurethane (Tecoflex®)
Contact us to discuss how a PTFE liner with strike layer could advance your next project.
Stock and Custom Options
We now offer etched PTFE liners on mandrels in our Online Store, in stock and ready to ship within 24 hours.
If we don't have what you need in our Online Store, we can offer custom sizes, wall thicknesses and length options. Contact us to discuss custom PTFE liner needs.