PTFE and UHMW Choice for Non-stick Bearings and Bushings in Food & Dairy Industry

Food & Dairy Bearings and Bushings:

Bearings and bushings can be found in almost every step in food or dairy processing industries.  Polymers are a popular choice for bearings and bushings in the food and dairy industry, both at the design stage and when retrofitting.  Because they are greaseless, the can provide a more sanitary environment for food processing.  They don’t require the maintenance that metal bearings and bushings require, thus reducing downtime for maintenance.  Their durability results in longer mean times to failure.  They are usually much more resistant to corrosion and much less chemically reactive than metal bearings and bushings.  They also weight much less than equivalent metal bearings and bushings.

Non-stick Applications

These are all good reasons to use polymer bearings in the food and dairy industries, but what about situations where one of the design requirements is non-stick bearings?  That is not a problem at all. There are, in fact, two specific plastics that are commonly used in these situations:  PTFE and UHMW PE.


PTFE, or Teflon, is well known for its anti-stick properties due to its use as a coating for cooking utensils.  In fact, even Geckos can’t hang on to PTFE.  PTFE is also hydrophobic.  It is usually known among engineers for having the lowest coefficient of friction any polymer or metal in existence.  It is also the least chemically reactive polymer, and has excellent wear properties.  It absorbs a minimal amount of moisture.  PTFE, in its virgin form, is odorless and tasteless.  It has FDA approval.


UMHW (ultra-high molecular weight) PE (polyethylene) is known for its toughness, including the highest impact strength of any polymer currently available.  It has no moisture absorption. Its coefficient is low enough to be comparable to PTFE. More importantly, like Teflon, it provides a non-stick surface. It is often chosen because of its ability to resist material hang-up. Among its other properties is an abrasion resistance that is 10x that of carbon steel.  UMHW PE is tasteless, odorless, and nontoxic.  It has been approved by the FDA, USDA, Canada AG and 3A dairy.


If you are designing equipment for the food and dairy industry, or looking to retrofit existing equipment, and require non-stick bearings or bushings, look no further than PTFE and UHMW PE.


Tags:teflon ptfe,UHMW,food industry

5 Applications for PEEK in the Medical Device Industry

There are millions of medical devices that include components made from PEEK.  This usage has grown tremendously in the past fifteen years and is still evolving. In this post, we are going to look at typical applications for PEEK in the medical device industry, including both implantable devices and non-implantable devices.

#1 PEEK in Spinal Applications

A stiffness comparable to that of human bone, radiolucent properties, and reduced stress shielding are just a few of the features that make PEEK an excellent choice for spinal applications.

Spinal applications of PEEK include:

  • minimally invasive spinal implants
  • disc arthroplasty,
  • anterior cervical plates,
  • dynamic stabilization and motion preservation
  • interspinous spaces
  • posterior spine stabilization rods

#2 PEEK in Orthopedic Applications

Arthroplasty and arthroscopy have made extensive use of PEEK for several years, including knee and shoulder arthroscopy along with knee and hip arthroplasty. The implementation of PEEK in hip cups has been especially useful. PEEK works very well for knotless suture anchors in shoulder arthroscopy. Tibial screw anchors and sheaths made of PEEK provide excellent strength and far less failure.

Benefits of PEEK for orthopedic applications include:

  • improved stability
  • significantly better wear performance
  • and less need for revision

#3 PEEK in Trauma Applications

PEEK is also used in bone trauma applications such as fracture fixation plates and intramedullary (fracture fixation) nails.

The usage of PEEK in trauma applications results in outcomes such as:

  • improved healing rates
  • better pain relief
  • more straightforward MRI and CT imaging when compared to their metal counterparts

#4 PEEK in Dental Applications

PEEK is also used in precision, customized dentures and prosthetics that are an alternative to traditional metal dentures. They have been found to be far more comfortable, easier to tailor to a patient’s needs and an excellent fit for the modern CAM/CAD approach to dental prosthetics.

#5 PEEK in Non-Implantable Devices

Not all PEEK applications in the medical industry are for implantable devices. PEEK can be found in pumps, pistons, fluid transfer applications, and valves. PEEK seals and bearings are well established for use in critical medical and pharmaceutical applications such as dialysis, equipment, blood pumps, infusion pumps, reusable medical instruments, medical device fixtures, or tissue cutting tools.  


In applications such as this, PEEK medical devices offer superior fatigue properties and low moisture absorption, which is critical in implantable devices. PEEK components are also more compatible with diagnostic imaging with no artifacts. Some grades of PEEK are radiolucent. Through fiber reinforcement, mechanical properties such as stiffness can be customized to meet application needs.It is possible to achieve a stiffness that approximates human bone using PEEK. Biocompatibility and biostability of load-bearing medical implants is another critical area in which PEEK excels. PEEK can also be manufactured using many different methods.


PEEK is used in many different areas of the medical industry, from implantable devices that have to be both strong and biocompatible to reusable medical instruments that have to be sterilized repeatedly using harsh processes such as autoclaving. PEEK is an good choice for medical applications for numerous reasons, including its excellent fatigue/wear properties, high strength-to-weight ratio, and biocompatibility.

Tags:peek,applications, polyetheretherketone


The base material was made via fiberglass impregnation in PTFE and refined, coating with silicone adhesive and with excellent heat resistant and mechanical strength.
Good release and smooth
Good performance of high temperature keeping, stable size.
Small friction coefficient, good insulation.
Good corrosion resistance.
1. According to different thickness, can be using as many kinds of drying machine conveyor, bonding tape, sealing tape.
2. Using for welding cloth for plastic products welding, backing mat for plastic, film, hot sealing
3. Electrical insulation, mat, gasket, and so one.
4. Heat cladding layer, pack of heat insulation body.
5. Microwave mat,, oven chips, food drying.
6. Adhesive tape, hot transfer printing table cloths, and so on.
7. Backing cloth for pressure sensitive ahdesive.
8. Architectural membrance, many place of canopy, etc.
9. For various petrochemical pipeline corrosion resistant cladding, power plant emissions, environmental desulfurization.
10. A flexible compensator, the friction material, wheel slice.
11. After special processing, making "anti-static cloth.

Material: PTFEE ; Color: Brown ; Surface friction coefficient: 0.05~0.1 ; Insulating coefficient: >=1012 ohm ; Adhesion strength (to metal):  28N/100mm ; Tensile strength: 1700N/100mm ; Temperature resistance: -70-300°

Tags: PTFE Electrical Tape,PTFE Tape

4 Key Benefits of PTFE Energized Seals for the Aerospace Industry

PTFE energized seals have found a multitude of applications in the aerospace industry.  

There are many reasons for the use of PTFE in aerospace. It offers excellent strength, extremely low friction, toughness, dimensional stability, and abrasion resistance. When combined with a spring-energizer, it provides a combination of properties and characteristics that work very well in the aerospace industry.

PTFE Seals and Aerospace

PTFE seals can be found in flight controls, jet engines, airframes, air management systems, and fuels systems. This includes commercial, military, and space applications. PTFE energized seals can be used in engine cooling lines, auxiliary power units, cabin pressure systems, compressor seals, turbine seals, pumps, fuel injectors, hydraulic controls, and more.

1.  Low Friction

One of PTFE’s most outstanding characteristics is extremely low friction. It is self-lubricating and can be used in dry-running applications without a problem.  PTFE also does not exhibit problematic stick-slip behavior. These features also reduce power and torque requirements, while increasing overall efficiency.  

2.  Extreme Temperature Performance

Aerospace applications often involve extreme temperatures, and PTFE is made for extreme temperatures. It can handle a wide range of temperatures, with a maximum continuous operating temperature of 550°F down to cryogenic temperatures like -450°F.  In addition, it remains extremely stable even at high temperature while retaining its flexibility at low temperatures.  PTFE is also nonflammable and has a UL 94 Flame Rating of 94 V-0.

3.  Extreme Chemical Inertness

PTFE is one of the most chemically compatible polymers on the market today.  It will not contaminate any sensitive media it comes into contact with, and is non-soluble. This makes it ideal for the aggressive chemicals encountered in aerospace applications, including jet fuels, degreasers, and hydraulic fluids.  Its primary weakness is alkali metals.

4.  Wide Pressure Range

Aerospace seals typically need to operate under extreme pressures, often ranging from 20 ksi to vacuum pressures.  Note that there are blends of PTFE specifically for high PV applications such as those encountered in aerospace applications.  It is also known for its excellent compressive strength.

Other Excellent Qualities

Another key aspect of PTFE spring energized seals is the incredible wear properties that PTFE possesses.  It also exhibits very, very low water absorption due to its hydrophobic nature, which also makes it easy to clean. PTFE is compatible with a variety of fillers that can improve its various properties so that it can be better tailored to meet design needs.  It also offers excellent stiffness and outstanding dimensional stability.

Power of Spring-Energized PTFE Seals

PTFE has excellent characteristics for aerospace applications, from its wide range of both operating pressures and temperatures to its chemical resistivity and dimensional stability.  When such properties are combined with its ease of manufacture and its performance in extreme environments, it’s easy to see why PTFE energized seals are a first choice for many aerospace engineers.

Tags:ptfe,teflon ptfe,seals

5 Reasons Why PTFE Seals are an Excellent Choice for Automotive Applications

Automotive PTFE Shaft Seals

In this article, we are going to explore the reasons why PTFE seals are among the best choices for many automotive applications.  You’ll find PTFE seals in fuel cell seals, fuel injection pumps, steering wheel seals, air conditioning, compressor seals, hydraulic seals, and more.  We’re going to focus our attention on PTFE shaft seals.  Let’s take a look!

Reason #1:  Low Friction

PTFE shaft seals have unbelievably low friction and are long lasting, keeping the fluids where they are supposed to be.  They are also capable of dry running, since they are self-lubricating and don’t require additional lubrication in order to perform well.


Reason #2:  Chemically Resistant

PTFE rotating shaft seals also perform extremely well in the presence of automotive fluids, including fluids and chemically aggressive oils.  They are regularly used with diesel and gasoline, as well as alternative fuels.  In fact, PTFE seals are among the most chemically resistant polymers on the market today. 


Reason #3:  Performance at High Temperatures

At high temperatures where other seals may begin to fail, PTFE dynamic shaft seals keep going strong.  They retain their performance characteristics even at abusive temperatures up to 600°F.  This includes their stiffness, strength, chemical resistance, low friction, dimensional stability, and durability.


Reason #4:  Survival at High Surface Speeds

PTFE dynamic seals work extremely well for demanding high surface speed applications because of their resistance to the effects of heat and their ultra-low friction characteristics, performing much better than their elastomeric counterparts.


Reason #5:  Reduction in Vehicle Emissions

Because of the reliable sealing power of PTFE, automobiles that make use of PTFE seals typically have lower vehicle emissions and CO2.  This is a powerful combination in a modern automotive industry where federal oversight and regulations are pushing toward more eco-friendly vehicles.

High Performance PTFE

PTFE rotary shaft seals are an increasingly common sight in the automotive industry, and far more reasons than just their low friction, chemical resistance, performance at high temperatures, survival at high surface speeds, and reduction in vehicle emissions.  If you are looking for a high performance, durable, reliable seal, don’t forget to check out PTFE.

Tags:PTFE,teflon ptfe,seal

4 Reasons: PTFE Rotary Shaft Seals for Low Friction High Speed Applications

PTFE rotary shaft seals are an excellent solution to high speed applications with surface speeds up to 30 m/s.  In this article, we are going to look at four reasons behind that continued popularity. 

Reason # 1 Low Friction

PTFE, also known as Polytetrafluoroethylene or by its trademarked name Teflon, has one of the lowest coefficient of friction of any solid known to mankind, even when in contact with metal.  It’s usually estimated at 0.05 to 0.10 for virginPTFE. Because of this extremely low friction, in many rotary applications there will be significantly less frictional drag when compared to options, such as conventional rubber shaft seals.


Reason # 2 Film Transfer

When PTFE rubs against a hard surface, it transfers a microscopic layer to that counter surface.  This contributes to its extremely low coefficient of friction.  Here’s how engineers and scientist describe the process:

  1. The molecules on the contacting surface of PTFE are deformed due to applied forces acting at that surface.
  2. The molecules begin to stretch along the direction of the sliding motion.
  3. Because of the weak intermolecular forces, PTFE molecules are transferred to the counter surface in a film between 50 to 200 Angstroms thick.
  4. As a result, PTFE is now sliding on PTFE instead of directly on the counter surface.


Reason # 3 Dry Running

Another awesome feature of PTFE is its ability to perform without additional lubrication.  PTFE is actually classified as a self-lubricating polymer.  It offers reduced stiction and breakout friction, which can be key for many rotary applications. 


Reason # 4 Chemical Resistivity

Another facet of PTFE that makes it popular as a shaft sealing material is its chemical resistivity.  The list of chemicals that can attack PTFE is short, and primarily consists of alkali metals, such as elemental sodium, and rare fluorinated solutions.  This chemical inertness is said to be a result of carbon-fluorine bonds in PTFE.

Another interesting facet of PTFE is its hydrophobic behavior, whereby it repels water and water-containing substances.  The hydrophobic behavior aids in its chemical inertness, and also makes it easier to keep clean.  This behavior due in part to the high electronegativity of fluorine.


Of course, there are more reasons behind the popularity of PTFE for rotary shaft seals in high speed applications.  PTFE has an extended shelf life, can perform at both cryogenic and extremely high temperatures, and is known for its easy installation.  However, the main reasons are its low friction, film transfer, dry running, and chemical resistivity.

So, the next time you need a rotary sealing solution that involves high speeds and low friction, check out PTFE rotary shaft seals.  They might be just the solution you are looking for.

Tags:ptfe teflon,teflon,seals

The Impact of Fluoropolymers on the Medical Device Industry

The impressive growth of the medical device, biomedical and healthcare industries over the past 15 years continues unabated even as materials such as fluoropolymers are meeting the increasingly challenging demand for new products and procedures. In general, fluoropolymers are progressively replacing other plastics in medical applications owing to their ability to meet the physical and biocompatibility requirements of the next generation drugs and devices.  Fluoropolymers meet a unique set of performance criteria in such applications. These include biocompatibility, lubricity, sterilization, chemical inertness, a wide temperature use range, low binding to process equipment, high-purity with low extractables, dielectric properties, and USP Class VI certification.


The family of available fluoropolymers that meet the above needs include grades of PTFE, FEP, PFA and PVDF resin from various resin producers. PTFE(teflon) has a well-established implant history of soft tissue replacement due to its biocompatibility and inertness. Resin and downstream product manufacturers continue to respond to new performance requirements by making appropriate modifications to the chemistry of the resin and surface configuration of the products, respectively.


The biocompatibility of any polymer is a principal requirement in any medical device such as catheters, bio-containment vessels, syringes and sutures. PTFE, FEP and PVDF are well established biocompatible materials, and their lubricity and chemical resistance make them the material of choice for products such as multi lumen tubing and others that are used in minimally invasive procedures. Multi lumen fluoropolymer catheter tubing for example allows surgeons to perform multiple procedures using the same catheter.


Fluoropolymers, especially PTFE(teflon)and PVDF are widely used in microporous membranes. Membranes, containing billions of pores ranging in size from 0.01 to 10 microns act as filters for particles and bacteria in critical fluids. PTFE and PVDF are among the few polymers used for filter membranes. The surfaces of the polymers membranes can be modified to deliver specific filtration properties and can be hydrophobic (water repelling) and oleophobic (oil, solvent, low surface tension fluid repelling). PVDF membranes can be also be surface modified to be hydrophilic (water loving) for removal of viral particles in the manufacture of therapeutic proteins and monoclonal antibodies. PVDF blotting membranes are particularly well suited for low background immunoblotting (western blot analysis), as well as for amino acid analysis and protein sequencing.


Accessory equipment, such as pumps, tubing, fittings used in conjunction with medical devices must meet similar performance and specification parameters. Accessories in direct contact with fluids are constructed of fluoropolymers such as PTFE and PVDF. For example, metering pumps such as diaphragm pumps are required for precise and repeatable flow, sometimes for chemically aggressive fluids.  Both PTFE and PVDF tubing are used in the construction of these pumps for this reason.


PVDF, although having a lower use temperature limit than PTFE(teflon), has a relatively high tensile strength and excellent permeation resistance to many fluids. It has a lower density (1.78 g/cc) than other fluoropolymers (approximately 2.18 g/cc). Due to a lower melting temperature than other fluoropolymers, it is more easily processible into products such as pipes, tubes, injection molded parts and films. It offers excellent dimensional and UV stability and is therefore finding new uses in aerospace, sensors, biotechnology and robotics markets.


Tags:teflon, Fluoropolymers,medical device