PTFE Increases

Cliff • November 3, 2011
PTFE Increases

Dear Eclipse Customers:

Over the last 12 months, Eclipse has seen exponential increases in raw material costs used in supplying you with the quality parts that are expected from us.

Historical pricing for Virgin PTFE had remained fairly stable until July 2010 when it began a steady rise from $8.00/KG to $26.70/KG in July 2011. This represents over a 200% increase in a one year period. The graph pictured below shows glass and bronze filled PTFE along with Virgin PTFE depicting these trends. PTFE is traded as a commodity on a worldwide basis so while there may be spot buys at favorable pricing,  overall pricing remains fairly consistent worldwide.

This kind of increase raises flags to those who see its immediate impact in their finished part pricing and has them asking why.

Flurospar is a mineral component required in the production of PTFE. There is currently a worldwide shortage of Fluorospar which has had a direct impact on PTFE pricing akin to an oil pipeline being shut down and seeing a near immediate increase in the cost of gasoline at the pump. The second factor is a bit more subtle. Pricing has been stable with little or no increase over the last 5-8 years. The industry had been absorbing some of these costs through a reduction in margin do to market tolerance. We believe there have been some opportunistic pricing that has been used to return margins back to previously sustained levels for the resin suppliers.

Relief for the rise in raw material cost can only come if the level of Fluorospar production is increased by opening new or dormant mines. We would be happy to provide the down hole seals.

PTFE is a material that is extremely difficult to replace because of the many favorable properties it exhibits. Few materials can match its broad range of uses and necessity because of the chemical resistance of its very slick properties. It has its niche and generally when you’re using it, there is a very good reason.

As a manufacture, the percentage of material cost in the piece price of a final part has risen substantially, while labor remains nearly unchanged.  There may be added improvements in manufacturing to offset this increase however it is generally seen in the production of higher volume jobs while the middle to small volume customer bears the full brunt of this increase due to the percentage gain.

In the end, while we at Eclipse engineering have done everything in our power to absorb previous increases and find new ways to manufacture parts in a more effective manner, these increases in raw material costs will begin to make a bigger difference in the pricing of the final product, which unfortunately you have already begun to see. We do believe we may have seen a leveling off at this point and hope that some stability will return to this market. We continue to push for the most competitive pricing from our suppliers and do expect pricing to decrease as supplies rise and refill the supply chain.

For more information on this subject you can visit:

Thank you for your continued support.

Sincerely,

Cliff Goldstein

CEO

 

By Doug Montgomery April 17, 2025
Discover how Eclipse Engineering optimized seal design for high-pressure CO₂ extraction, addressing extrusion gaps and wear ring exposure challenges.
Learn how Eclipse solved manufacturing challenges for micro spring-energized seals
By Doug Montgomery March 21, 2025
Learn how Eclipse solved manufacturing challenges for micro spring-energized seals, optimizing sealing performance in epoxy dispensing equipment.
By Doug Montgomery February 13, 2025
Learn how Eclipse Seal’s custom spring energized ball seats with angled grooves improve performance
By Doug Montgomery January 17, 2025
Eclipse deals regularly with challenging sealing applications from all industries. High pressures and speeds create unique sets of conditions where seal design and material properties are pushed to the limit. While reciprocating applications can certainly test seals to the edge of capability, often times rotary applications can present the greatest challenge to seal integrity and wear life. Unlike reciprocating configurations where the seal is acting on a different part of the shaft or bore throughout it’s operating range, rotary seals must operate on the same sealing area continuously. This makes things like heat rejection much more difficult, especially in unlubricated or dry running applications. Extreme localized heating can have negative affect on both seal and hardware life. Rotary applications also pose sealing difficulties due to the simple fact that surface speeds can be much higher than in reciprocating systems. A simple electric motor can operate at very high rpm, while long stroke, high speed reciprocating machinery is a major piece of equipment that is far less common (though Eclipse also has sealing solutions in a number of these situations). A customer approached Eclipse with an application that was beyond the scope and capability of any standard, off-the-shelf rotary seal. This sealing system would require a combination of both wear resistance in high-speed rotary, as well as excellent leakage control and sealability. Two factors that, more often than not, work in opposition to each other. The Customer Issue The customer was developing a test system that required an electric motor shaft passed through the wall of a large vacuum chamber. The testing apparatus needed a sizable motor to meet the speed and torque requirements. Adapting the motor to operate inside the chamber would not be practical due to contamination and motor cooling concerns. Therefore, the motor would have to be placed outside the chamber and a driveshaft would have to go through the chamber wall. Which, of course, would need a seal. Operating Conditions:
 Rotary Shaft Seal
 Shaft Diameter: 2.5”
 RPM: 7,500 RPM - unlubricated
 Pressure: Vacuum internal side / 1 ATM external side Temperature: 40° - 90°F The customer knew any kind of off-the-shelf rotary seal with a rubber element would not last any amount of time in the combination of speed and a dry running condition. They also knew a single lip PTFE seal would likely not meet their leakage requirements. Therefore, they turned Eclipse for a custom sealing solution.