Molecular Material Changes Help Freudenberg-NOK Sealing Technologies Simrit
Address Hydraulic Challenges
New polyurethane will be showcased at company's IFPE booth (#81330)
LAS VEGAS, March 3, 2014
LAS VEGAS, March 3, 2014 /PRNewswire/ --Amid the giant earthmoving machinery
and massive hydraulic components on display at 2014 Fluid Power, Power
Transmission, Motion Control Exposition (IFPE) and CONEXPO-CON/AGG in Las
Vegas, is a new break-through technology that relies upon molecular
innovation. Freudenberg-NOK Sealing Technologies Simrit will display seals
made from a new generation of polyurethane targeted to address crucial fluid
power challenges, such as more aggressive environments, higher temperatures
and longer operating periods.
"Freudenberg-NOK's new polyurethane material is more resistant to water and
synthetic hydraulic fluids and withstands major temperature fluctuations
better than existing polyurethanes," said Dr. Jurgen Hieber, head of Materials
Development at Freudenberg Sealing Technologies' Schwalmstadt, Germany
facility where seals from the new material are made. Hieber worked on the
polyurethane formula for three years before perfecting it.
The new material is the best on the market today, Hieber said, and is
especially well-suited for use in construction and agricultural machinery, and
materials-handling equipment. Seals made from the new polyurethane offer
manufacturers the ability to meet diverse working conditions without
maintaining an inventory of different components, such as hydraulic cylinders
that address unique environmental demands. With a standard operating range of
-35 degrees C to +120 degrees C, the material stays flexible at low
temperatures and stable at high temperatures. In fact, Freudenberg-NOK
engineers targeted prolonged thermal resistance in developing the new
polyurethane. Through polymer engineering – a core competency of
Freudenberg-NOK – this new material has been developed by making use of an
advanced molecular architecture that favors viscoelastic material behavior.
"Our engineers saw the needs in the market and met them," said Mathias
Burkert, a Freudenberg Sealing Technologies product manager in Schwalmstadt.
"Today's mobile machinery is being developed for worldwide use. Seals must
perform their function in the desert as well as in frozen climates, and must
do so reliably for the lifetime of the equipment. We have achieved the
objectives of being more robust and lasting longer."
"The new material is superior to other polyurethanes in all relevant areas,"
agreed Hieber. "It offers superb performance in heat and cold, can be used in
mineral hydraulic fluids at up to 120 degrees C and is safe from damage due to
hydrolysis even when used in water heated to 80 degrees C."
The new polyurethane also performs excellent under pressure. In a comparison
test with various extrusion gaps and pressures, seals with the new generation
of polyurethane show no appreciable sign of wear, while conventional seals
malfunction prematurely. Its tear strength also surpasses current
possibilities measuring around 120 megapascals, or 35 percent above other
In addition, the material doubles extrusion stability thus avoiding damage
caused by the peaks in pressure commonly experienced in heavy duty equipment.
"As a result, we can apply much more pressure on the cylinders than we could
previously," Hieber said. "Our products have been engineered to last three to
four times longer than others using this new material."
About Freudenberg-NOK Sealing Technologies
Freudenberg-NOK Sealing Technologies is the Americas joint venture between
Freudenberg and Co. in Germany and NOK Corp. in Japan. Freudenberg-NOK is a
leading producer – through its Automotive, Merkel, Process Seals and Simrit
sales channels – of advanced sealing technologies for a variety of markets
including: aerospace; agriculture; appliance; automotive; construction;
diesel engine; energy; food and beverage; heavy industry; and pharmaceutical.
Founded in 1989 under the legal name Freudenberg-NOK General Partnership,
Freudenberg-NOK is headquartered in Plymouth, Mich. and operates more than 20
facilities across the Americas. For additional information, please visit
SOURCE Freudenberg-NOK Sealing Technologies
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