The Characteristics of PTFE Molded Tubes

Introduction to Polytetrafluoroethylene (PTFE)

Polytetrafluoroethylene, commonly known as "King of Plastics", can have its properties improved by adding carbon, graphite, glass, and other additives.

Introduction to PTFE Molded Tubes

Main Properties of PTFE Tubes

• Excellent chemical resistance;

• Operating temperature: -190℃ to +260℃;

• Strongest fatigue resistance (Wöhler curve);

• FDA-approved;

• Flame-resistant - UL94V0;

• Low friction coefficient;

• UV resistance (does not age);

• Non-hygroscopic (water absorption rate < 0.01%);

• Excellent dielectric insulation performance.

Applications of PTFE Molded Tubes

Wire insulation sheathing, pipelines for corrosive fluid media, electrical insulation components used in various high-frequency environments, etc.

Differences of PTFE Tubes

The differences between PTFE molded tubes, extruded tubes, and filled tubes are as follows:

Different manufacturing processes:

(a) PTFE molded tubes are made using a molding process, having a dense external structure without mechanical impurities and high strength.

(b) PTFE extruded tubes are made using suspension polymerized PTFE resin and processed by plunger extrusion.

(c) PTFE filled tubes are made using filled PTFE resin through a molding process. Suspension polymerized PTFE resin is mixed with various fillers to form filled PTFE resin.

Different properties and applications:

(a) PTFE molded tubes are used for corrosive medium fluid pipelines, insulation sheathing, and drive shaft coverings. They are suitable for transporting highly corrosive gases and liquids at high temperatures, which cannot be replaced by other pipelines.

(b) PTFE extruded tubes have the best chemical corrosion resistance and dielectric properties. They are suitable for transporting food and beverages, steam, chemicals/pharmaceuticals, etc., and are used in flexible connectors.

(c) PTFE filled tubes are suitable for various fillers mixed with PTFE, such as glass fiber, carbon fiber, bronze, and lubricants (e.g., graphite, molybdenum disulfide), and are widely used in mass production. Compared to pure PTFE, filled PTFE has higher compressive strength, better wear resistance, better thermal conductivity, and reduced thermal expansion.