Material Characteristics

Performance Indicator	Parameter Range	Key Advantage
Operating Temperature Range	-200°C to +260°C	Extremely wide temperature adaptability
Coefficient of Friction	0.04 - 0.1	Excellent self-lubrication
Chemical Corrosion Resistance	Resistant to strong acids & bases (except molten alkali metals)	Nearly insoluble in any solvent
Electrical Insulation	Volume Resistivity > 10¹⁸ Ω·cm	Volume Resistivity > 10¹⁸ Ω·cm
Surface Properties	Surface tension ~18.5 dyn/cm	Non-stick, hydrophobic

Common Product Types

Product Category	Typical Applications	Special Requirements
Seals	Flange gaskets, valve seats	Corrosion & high-temperature resistance
Bearing Bushings	Oil-free lubrication bearings	Low coefficient of friction
Insulating Components	High-frequency electronic components	High dielectric strength
Corrosion-Resistant Liners	Chemical equipment linings	Corrosion resistance, impermeability
Medical Products	Artificial blood vessels, catheters	Biocompatibility certification

Basic Performance Parameters

Performance Indicator	Typical Value	Test Method	Characteristic Note
Density	2.14 - 2.20 g/cm³	ISO 1183	Relatively high for solid materials
Melting Point	327°C	ASTM D3418	Crystalline transition temperature
Continuous Service Temp	-200°C to +260°C	ASTM D794	Short-term up to 300°C possible
Heat Deflection Temp. (0.46 MPa)	121°C	ASTM D648	Performance under low load
Coeff. of Linear Thermal Expansion	10 - 12 ×10⁻⁵/°C	ASTM D696	Thermal expansion must be considered in design

Mechanical Performance Comparison

Property	Pure PTFE	25% Glass Fiber Reinforced	15% Graphite Filled	Test Standard
Tensile Strength	20 - 35 MPa	40 - 55 MPa	30 - 45 MPa	ASTM D638
Elongation at Break	300 - 500 %	150 - 300 %	150 - 300 %	ASTM D638
Flexural Modulus	400 - 600 MPa	1200 - 1800 MPa	800 - 1200 MPa	ASTM D790
Compressive Strength	12 - 15 MPa	25 - 35 MPa	20 - 28 MPa	ASTM D695

Friction and Wear Characteristics

Parameter	Parameter	Test Conditions
Dynamic Friction Coefficient	0.04 - 0.10	Steel vs. PTFE, Load: 0.5 MPa
Static Friction Coefficient	0.05 - 0.12	Steel vs. PTFE, Static state
PV Limit Value	0.035 MPa·m/s (unlubricated)	Continuous operation
Wear Amount	10 - 50 mg/1000 revolutions	Load: 1 MPa, Speed: 0.5 m/s

Product Specification Reference

Type	Standard Size Range	Machining Tolerance	Suitable Process
Sheet	Thickness: 1 - 100 mm	±0.1 - 0.5 mm	Turning / Cutting
Rod	Diameter: Φ5 - 300 mm	±0.05 - 0.2 mm	Turning
Tube	Diameter: Φ10 - 500 mm	±0.1 %	Extrusion
Film	Thickness: 0.01 - 1 mm	±5 %	Biaxial Stretching

Primary Machining Processes

1.  Compression Molding:

       Suitable for simple shapes.

       Process Temperature: 360-380°C.

       Pressure: 20-40 MPa.

2.  Turning/Machining:

       Suitable for high-precision parts.

       Can produce films as thin as 0.05 mm.

       Dimensional accuracy up to ±0.01 mm.

3.  Isostatic Pressing:

       Used for large components.

       Avoids internal stress.

Industry Application Guide

Application Industries for Custom PTFE Parts

   Chemical Industry: Acid/alkali-resistant valves, pump liners, reactor seals.

   Food & Pharmaceutical: Non-stick components for food machinery, medical catheters, sterile equipment parts.

   Electronics & Electrical: High-frequency insulating supports, semiconductor equipment accessories.

   Mechanical Manufacturing: Oil-free lubrication bearings, guide rails, gears.

   Aerospace: Lightweight, high/low-temperature resistant seals, insulating parts.

Design and Selection Considerations

1.  Material Selection:

       Pure PTFE: General-purpose, corrosion-resistant, but lower mechanical strength.

       Filled PTFE (e.g., glass fiber, carbon fiber, bronze): Enhances wear resistance, rigidity, or thermal conductivity.

2.  Tolerance Requirements:

       Standard machining tolerance: ±0.1 mm. High precision: up to ±0.02 mm (requires special processes).

3.  Surface Treatment:

       Smooth Finish: Reduces friction coefficient, suitable for sliding parts.

       Matte/Etched Finish: Improves bonding (requires sodium-naphthalene treatment).

4.  Volume & Cost:

       Low Volume: CNC machining offers more flexibility.

       High Volume: Compression molding + machining is more cost-effective.

Latest Technological Developments

   Filler Modification: Incorporation of glass fiber, graphite, etc., to enhance mechanical properties.

   Nanocomposites: Improve wear resistance and dimensional stability.

   3D Printing: Enables rapid prototyping of complex structures.

Quality Inspection Standards

   Visual Inspection: GB/T 5477

   Density Test: ISO 1183

   Tensile Strength: ASTM D638

   Dielectric Strength: IEC 60243