GORE® Low Friction Film for Dynamic Seals

When you design the future of automotive mobility, don’t use materials of the past! Instead, use GORE® Low Friction Film, a tissue-thin coating material made from graphite-filled expanded PTFE (ePTFE), to enable a new level of performance in dynamic elastomer seals: Lower friction. Longer life. Better tightness.

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Image of the GORE® Low Friction Film product flyer.

Coating material for dynamic elastomer seals

This document presents the performance advantages of using GORE Low Friction Film to meet the design demands of the future: realize complex designs with reduced friction and torque, for longer-wearing dynamic elastomer seals that can enable smaller, less complex parts and more cost-competitive, energy-efficient components.

English (U.S.)

Alle Infos zu GORE® Low Friction Film for Dynamic Seals

Overview

GORE® Low Friction Film: a material made for designing the future

GORE Low Friction Film – an innovative, tissue-thin coating material for dynamic elastomer seals – creates a permanent mechanical connection with the elastomer during the molding process.

Made from graphite-filled ePTFE (expanded polytetrafluoroethylene), this new solution opens up new opportunities and potentials in design, performance and application of dynamic seals. In automotive applications, it reduces friction and improves wear-resistance while maintaining excellent elasticity and sealability. Quite simply, this material is made for designing the future of mobility.

The “e” makes all the difference!

The “e” in ePTFE stands for “expanded” – it’s Gore’s proprietary technology for transforming ordinary PTFE to create a world of new possibilities. By manipulating this expansion process, we can create a wide range of material structures that are unique at the micro level. Customizing these microstructures lets us adapt ePTFE’s properties and performance characteristics to meet very specific application needs. For example, the graphite filling in GORE Low Friction Film improves its wear-resistance even further.

Image of a futuristic looking lab.

Performance Advantages

Get the best of both worlds – with GORE Low Friction Film

In many industries, the future is evolving rapidly, confronting engineers with new challenges. That is why we developed a solution for friction-reduced dynamic seals that doesn’t compromise the benefits pure elastomers deliver: GORE Low Friction Film eliminates the compromises that have always plagued dynamic seals.

With GORE Low Friction Film, you don’t have to struggle with:

  • Pure elastomer: Choosing the sealability of pure elastomer but living with high friction, which leads to higher power consumption/torque and potential part-reliability issues.
  • Solid rings of conventional PTFE: Incorporating solid PTFE rings to reduce friction but facing high materials cost, design and production complexities as well as ongoing reliability concerns due to abrasion and wear.
  • Composite with layer of conventional PTFE: Adding a layer of conventional PTFE to reduce friction but dealing with the consequences of its rigidity: more costly processing and loss of seal flexibility, rapid wear, potential leakage and bond failure.

GORE Low Friction Film now combines the best of both worlds: we’ve merged the performance advantages of pure elastomer and ePTFE, to help you to design the future of mobility without tradeoffs! Here’s how it works:

 

One solution, five future-focused performance advantages

GORE Low Friction Film is unique: materials from the past don’t offer this combination of advantages.

Performance advantage of GORE® Low Friction Film for dynamic seals 1: excellent reduction in seal friction.

Excellent reduction in seal friction
Using GORE Low Friction Film is the most efficient way to reduce torque in dynamic elastomer seals. Less torque leads to lower power consumption, which enables the use of smaller, less complex, lighter-weight motors to increase cost- and energy-efficiency.

Performance advantage of GORE® Low Friction Film for dynamic seals 2: superior wear-resistance.

Superior wear-resistance
In terms of wear resistance, GORE Low Friction Film outperforms all alternatives – like conventional PTFE rings or layers, and even certain elastomers – in both dry and wet environments, by a factor of at least two. Greater wear-resistance means longer, more predictable seal lifespan, for more reliable parts/components.

Performance advantage of GORE® Low Friction Film for dynamic seals 3: elastomer-like elasticity and sealability.

Elastomer-like elasticity and sealability
GORE Low Friction Film is thin and slightly stretchy: designed to bend and move in concert with the elastomer, it offers excellent elasticity and seal tightness to prevent leakage. GORE Low Friction Film will retain its surface integrity even after it has been bent many thousands of times. This makes seal handling and installation easier, too.

Performance advantage of GORE® Low Friction Film for dynamic seals 4: permanent mechanical bond.

Permanent mechanical bond
With GORE Low Friction Film, the elastomer penetrates the film’s unique microporous structure during the molding process. This creates a strong mechanical bond that is, unlike weaker chemical bonds created by gluing, literally inseparable.

Performance advantage of GORE® Low Friction Film for dynamic seals 5: effortless integration into molding operations.

Effortless integration into molding operations
As the elastomer fills the mold, it compresses the GORE Low Friction Film, which conforms smoothly and completely to the mold’s geometry. Our film easily realizes the complex seal designs that ordinary thin-layer PTFE simply is not flexible enough to achieve — to transform the most advanced designs into a longer-wearing reality.

The future of sealing has never looked better

Whether the goal is to improve fuel economy, EV range or component reliability … or reduce component complexity, size, power consumption or cost, dynamic seals with GORE Low Friction Film can give you the competitive edge in everything from seal design and production to part reliability.

 

GORE Low Friction Film lives up to its promises
GORE Low Friction Film effectively reduced friction (Test: ASTM D 1894), and it offers other performance advantages that PTFE lacks. Test results proving that GORE® Low Friction Film outperforms alternatives in reducing friction.
Wet or dry, GORE Low Friction Film was the most wear-resistant (Test: ASTM G77). Test results proving that GORE® Low Friction Film outperforms alternatives in wear performance.

 

Properties & Applications

More flexibility for your dynamic seals

GORE Low Friction Film is thin, flexible and even slightly stretchy, which makes it a perfect partner for elastomeric seals. Once the two materials are bonded, our film continues to flex and move in concert with the elastomer, for the lifetime of the seal — no wrinkling, no potential leak paths like with stiff and rigid PTFE-layered seals. That makes seal handling and installation less problematic, too.

Comparison of dynamic seals with conventional PTFE and the new GORE® Low Friction Film.

Comparing dynamic seals with conventional PTFE and the new GORE Low Friction Film: After a few bends, conventional PTFE is prone to wrinkling. The seal with GORE Low Friction Film retains its surface integrity and sealing performance after it has been bent many thousands of times.


More flexibility for your business
GORE® Low Friction Film on an elastomer seal shaped with two undercuts to test its moldability performance.

To demonstrate the moldability of GORE Low Friction Film, we successfully molded it to the outside of this elastomer shape with two undercuts.

GORE Low Friction Film’s flexibility can offer your business more options — and more advantages — in seal design and production. Due to its unique properties, GORE Low Friction Film realizes the most advanced seal designs, thus enabling you to manufacture small, light-weight and long-wearing components — potentially replacing yesterday’s complex PTFE assemblies with one single dynamic seal.

This allows your business to provide solutions for a wider variety of demanding dynamic seal applications, especially in the automotive industry.


Excellent chemical stability for elastomer seals

Due to its excellent chemical stability, GORE Low Friction Film’s bond with the elastomer will remain unaffected by exposure to varied media. Media exposure in these applications may include:

A thermometer indicates that GORE® Low Friction Film remains unaffected by exposure to coolants in thermal management applications.

Coolants
Used in: Thermal Management valves

A snowflake indicates that GORE® Low Friction Film remains unaffected by exposure to refrigerants in air conditioning applications.

Refrigerants
Used in: Air conditioning valves

A drop of oil indicates that GORE® Low Friction Film remains unaffected by exposure to hydraulic fluids in actuators.

Hydraulic oils
Used in: Actuators

Gears and a drop of oil indicate that GORE® Low Friction Film remains unaffected by exposure to transmission fluids in electric motors and gear shafts.

Transmission fluids
Used in: Electric motors, Gear shafts


Learn more about GORE Low Friction Film and how to use it
Image of the GORE® Low Friction Film product flyer.

GORE Low Friction Film Product Flyer
This document presents the performance advantages of using GORE Low Friction Film to meet the design demands of the future: realize complex designs with reduced friction and torque, for longer-wearing dynamic elastomer seals that can enable smaller, less complex parts and more cost-competitive, energy-efficient components.

For Molders: Usage & Product Offering

Compatibility of GORE Low Friction Film with elastomers
Cross-section showing the inseparable bond of elastomer and GORE® Low Friction Film.

We have tested GORE Low Friction Film for compatibility with many common elastomers of varying hardnesses. Each type of elastomer successfully penetrated the pores of our film in molding.

There were no issues of chemical incompatibility. As demonstrated by peel-strength testing, each elastomer successfully achieved an unbreakable mechanical connection with our film.

 

 

GORE Low Friction Film is supplied in rolls

GORE® Low Friction Film product image: the thin film is supplied in rolls.

Available widths:
175 mm ± 7 mm
350 mm ± 10 mm
700 mm ± 15 mm
Custom widths upon request

Available lengths:
150 m + 1.5 m / – 0 m
300 m + 2 m / – 0 m
Custom lengths upon request

Uncompressed film thickness:
200 µm ± 80 µm

Compatible with injection and compression molding as well as with a wide range of elastomers.

A graphic showing how to use GORE® Low Friction Film in injection and compression molding.

 

Downloads

Image of the GORE® Low Friction Film product flyer.

GORE Low Friction Film Product Flyer
This document presents the performance advantages of using GORE Low Friction Film to meet the design demands of the future: realize complex designs with reduced friction and torque, for longer-wearing dynamic elastomer seals that can enable smaller, less complex parts and more cost-competitive, energy-efficient components.

 

Contact Us

Ready to explore the new possibilities? We’re here to answer your questions, supply additional information and samples, or provide technical support for validation testing. We can also assist you with prototyping and supporting you in successfully integrating GORE Low Friction Film. For any or all of the above contact us – we would love to talk about your project!

Contact us

 

FOR INDUSTRIAL USE ONLY

Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.

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