Glass Fiber-Filled PTFE Tube

Glass fiber-filled PTFE tubing is one of the modified PTFE tube and rod products offered by Taifno; it incorporates 15% to 25% glass fiber reinforcement into the PTFE matrix. This composition enhances the material's rigidity, creep resistance, and dimensional stability while maintaining PTFE's excellent chemical resistance and low-friction properties.

Key specifications: temperature range of -196°C to +260°C, pressure resistance up to 8.0 MPa, tensile strength ≥25 MPa, and density of 2.1–2.3 g/cm³.

Please provide your required dimensions, specifications, and application details; as a professional manufacturer, Taifno will provide you with a factory-direct price quote within 24 hours.

What Is Glass Fiber-Filled PTFE Tube?

A glass fiber-filled PTFE tube is manufactured by adding 15-25% glass fiber filler to PTFE resin through compounding, then extruding or molding into tube form.

The glass fibers act as a reinforcing skeleton within the PTFE matrix, providing structural reinforcement that prevents the tube from expanding when exposed to water and heat.

Manufacturing processes:

Glass Fiber Content Options:

Key Properties

Material Data

Key Characteristics

Why Choose Glass Fiber-Filled PTFE Tube?

1. Enhanced Rigidity and Dimensional Stability

Unlike virgin PTFE, glass fiber-filled PTFE tubes do not expand when exposed to water and heat, allowing precision machining to close tolerances.

This makes them ideal for applications where dimensional accuracy is critical.

2. Improved Creep Resistance

Virgin PTFE creeps under sustained load. Glass fiber reinforcement significantly reduces cold flow and creep relaxation, maintaining dimensional stability over time.

3. Increased Mechanical Strength

Glass fiber-filled PTFE offers higher tensile strength (≥25 MPa) and compression strength (24 MPa) compared to virgin PTFE. Suitable for higher pressure and load applications.

4. Universal Chemical Resistance

Retains PTFE's excellent chemical resistance, withstands strong acids, strong alkalis, and most chemical solvents.

Not compatible with molten alkali metals or elemental fluorine.

5. Machinability

The reinforcement prevents deformation during machining and can be machined to close tolerances.

Available in both extruded and molded forms to suit different diameter and volume requirements.

Product Applications

Primary Industries

Typical Applications

Corrosive fluid transfer lines requiring higher mechanical strength

Chemical injection lines in oil and gas

Valve seats and seals in high-pressure service

Bearing pads and guide rings

Electrical insulation components requiring tight tolerances

Custom machined parts where dimensional stability is critical

Pipe linings for abrasive media

Filler Content Selection Guide

Glass-Filled vs. Virgin PTFE Tube: The Differences

Quality Assurance

100% Virgin PTFE Resin: no regrind, no recycled material. Consistent quality, batch after batch

Premium Glass Fiber: Uniform dispersion for consistent mechanical properties

Precision Manufacturing: Extruded and molded processes for consistent dimensions

Full Traceability: Material certificates available with traceable lot numbers

FDA, REACH, RoHS Compliant: Certificates available

Custom Sizes: Custom diameters, lengths, and glass content available on request

Lead Time: Standard sizes in stock (24-48 hours); custom sizes 5-15 days

FAQ

Q: Glass fiber-filled PTFE tube vs. virgin PTFE tube, when should I choose glass-filled?

A: Choose glass-filled when you need rigidity, dimensional stability, and the ability to machine to close tolerances.

Virgin PTFE expands when exposed to water and heat, making it difficult to maintain tight tolerances.

Glass fiber reinforcement prevents this expansion and provides improved creep resistance.

Choose glass-filled for: precision components, high pressure, valve seats, bearing applications, and any application requiring dimensional stability.

Choose virgin PTFE for: clean chemicals, general service, low load, and FDA applications where no fillers are permitted.

Q: What are the available glass fiber content options, and how do I choose?

A: Glass fiber filled PTFE tubes are available in 15%, 20%, and 25% glass fiber content.

15% glass fiber: moderate rigidity improvement with better machinability.

20% glass fiber: general purpose, good strength and creep resistance.

25% glass fiber: maximum strength, rigidity, and dimensional stability.

Quick rule:

General applications → 15-20% glass.

High load, high wear, precision requirements → 25% glass.

Send us your application details and we will recommend the optimal content.

Q: What are the temperature and pressure limits for glass fiber-filled PTFE tube?

A: Temperature: Continuous -196°C to +260°C.

Pressure: Up to 8.0 MPa.

Chemical: pH 0-14, resists strong acids, strong alkalis, and most chemical solvents.

⚠️ NOT compatible with hydrofluoric acid (HF) or strong alkali, glass fiber reacts with these chemicals.

For HF service, use virgin PTFE tube.

For specific data based on your application conditions, please provide your temperature, pressure, and media type.