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Specialty Material

PTFE (Teflon) forLow-Friction & Chemical Applications

PTFE (Teflon) is a high-performance fluoropolymer known for its extremely low friction, outstanding chemical resistance, and non-stick properties in demanding environments.

PTFE material stock and machined sealing components
Material Overview

What is PTFE (Teflon)?

PTFE (Polytetrafluoroethylene), commonly known as Teflon, is a high-performance fluoropolymer known for its extremely low coefficient of friction, exceptional chemical resistance, and non-stick surface properties. It is widely used in CNC machining, CNC turning, and drilling & threading for seals, gaskets, and wear components that must operate in aggressive chemical environments or under continuous sliding contact. Due to its softness and tendency to deform under load, PTFE is typically selected for low-load, high-performance applications where friction reduction and chemical stability are more critical than structural strength.

Machined PTFE components for sealing and low-friction applications
Specifications

PTFE (Teflon) Specifications

Engineering-grade properties of PTFE, including mechanical, thermal, and chemical characteristics relevant to sealing, sliding, and chemically aggressive environments. This data supports material selection for specialized applications requiring low friction and chemical inertness.

PTFE Engineering Properties

Material Type

Fluoropolymer (PTFE)

Primary Characteristics

Extremely low friction, outstanding chemical resistance, non-stick surface, soft material

Tensile Strength (Ultimate)

2,500–4,000 psi (17–28 MPa)

Elongation at Break

200–400%

Compressive Strength

Low to moderate (creep under load)

Hardness

Shore D50–D65

Density

2.15–2.20 g/cm³

Elastic Modulus

75,000–100,000 psi (0.5–0.7 GPa)

Coefficient of Friction

Very low (one of the lowest of any solid material)

Continuous Service Temperature

~260 °C (500 °F)

Melting Point

~327 °C (620 °F)

Glass Transition Temperature

~115 °C (239 °F)

Thermal Conductivity

~0.25 W/m·K

Machinability

Good (soft material; requires sharp tools and controlled cutting conditions)

Chemical Resistance

Excellent (resistant to almost all chemicals and solvents)

Wear Resistance

Moderate (improved with filled grades)

Electrical Insulation

Excellent

Moisture Absorption

Negligible

Common Forms

Rod, sheet, tube

Typical Applications

Seals, gaskets, valve seats, bearings, liners, chemical handling components

Performance

Material Performance Overview

Standardized comparison across key engineering and manufacturing criteria.

Strength

Weight

Machinability

Friction Performance

Chemical Resistance

Thermal Resistance

Dimensional Stability

Cost Efficiency

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Where PTFE (Teflon) is Commonly Used

PTFE is widely used in applications where low friction, chemical resistance, and thermal stability are critical. It is especially common in sealing systems and components exposed to aggressive environments.

Seals and gaskets

Valve seats and fluid handling components

Low-friction bearings and bushings

Chemical processing equipment

Liners and non-stick surfaces

Electrical insulation components

Food-grade and sanitary applications

Sliding and wear components

Custom machined fluoropolymer parts

Material FAQs

PTFE (Teflon) FAQs for Manufacturing and Industrial Applications

Common questions from engineering, sourcing, and product development teams working with PTFE across machining, sealing solutions, and chemically aggressive environments.

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Material Guide

PTFE (Teflon): Properties, Machining, and Applications

PTFE (polytetrafluoroethylene), commonly known as Teflon, is a high-performance fluoropolymer known for its extremely low friction, outstanding chemical resistance, and wide operating temperature range. It is primarily processed through CNC machining services and sheet cutting, rather than conventional molding for precision components.

For engineering and sourcing teams, PTFE is often selected when applications require near-zero friction, aggressive chemical resistance, or non-stick performance, especially in environments where most other plastics and even metals would fail.

Key manufacturing characteristics of PTFE

  • Ultra-low friction coefficient: One of the lowest friction materials available for engineering applications.
  • Exceptional chemical resistance: Resistant to almost all chemicals, including acids, solvents, and corrosive fluids.
  • Non-stick surface behavior: Extremely low surface energy prevents adhesion.
  • Wide temperature range: Performs across very low and high temperatures.
  • Soft and deformable material: Requires careful handling during CNC machining services.
  • Machining-driven material: Typically processed via machining rather than high-precision molding.

Mechanical and physical properties of PTFE

PTFE is typically selected for chemical and tribological performance rather than mechanical strength. Compared to PEEK or acetal, PTFE offers far superior chemical resistance and lower friction, but significantly lower strength and stiffness.

Typical performance profile

  • Extremely low coefficient of friction
  • Very high chemical resistance across most environments
  • Low mechanical strength and stiffness
  • High creep under sustained load
  • Stable performance across extreme temperatures

Why engineers choose it

  • Enables non-stick and low-friction system performance
  • Performs in aggressive chemical environments
  • Suitable for seals, liners, and fluid-handling components
  • Provides unique properties not matched by most other materials

Strengths and advantages of PTFE

  1. Near-zero friction: Ideal for bearings, seals, and sliding components.
  2. Outstanding chemical resistance: Performs in environments where most materials degrade.
  3. Wide temperature capability: Suitable for both cryogenic and elevated temperature conditions.
  4. Non-stick behavior: Prevents buildup, fouling, or material adhesion.
  5. Electrical insulation properties: Excellent dielectric performance.
  6. Stable in harsh environments: Performs reliably in demanding industrial conditions.

Trade-offs and limitations of PTFE

  1. Low mechanical strength: Not suitable for load-bearing structural applications.
  2. High creep: Deforms significantly under long-term load.
  3. Poor dimensional stability under stress: Not ideal for tight tolerance precision parts.
  4. Difficult to bond: Extremely low surface energy makes adhesive bonding nearly impossible.
  5. Soft material behavior: Can deform during machining and assembly.
  6. Higher cost than commodity plastics: More expensive than materials like HDPE or polypropylene.

Fabrication and machining considerations for PTFE

Machining behavior

PTFE is commonly processed using CNC milling and CNC turning, but its softness and flexibility require careful process control.

  • Material can deform under clamping pressure
  • Sharp tooling is critical for clean cuts
  • Dimensional accuracy can be affected by material relaxation

Dimensional stability and creep

  • Parts may deform under sustained load over time
  • Design must account for creep and compression set
  • Not suitable for tight-tolerance load-bearing applications

Sealing and fluid applications

  • Excellent for gaskets, seals, and valve components
  • Performs well in aggressive chemical systems
  • Often used in fluid handling and process industries

Joining and assembly

  • Typically assembled using mechanical retention
  • Adhesive bonding is generally not feasible
  • Designs must account for material deformation

Common applications for PTFE

PTFE is widely used in industries requiring chemical resistance, low friction, and high-performance sealing.

  • Seals and gaskets
  • Bearings and sliding components
  • Chemical processing equipment
  • Valve seats and fluid system components
  • Electrical insulation components
  • Non-stick surfaces and liners
  • Semiconductor and cleanroom components

When PTFE is a strong material choice

PTFE is often the right choice when chemical resistance, low friction, and temperature stability are critical, and mechanical strength is not the primary requirement.

  • When near-zero friction is required
  • When parts are exposed to aggressive chemicals
  • When non-stick behavior is critical
  • When operating across extreme temperatures
  • When sealing performance is more important than structural strength