High-Performance TPU Seals
September 1, 2016
C. Otto Gehrckens has introduced COG VarioPur, a new product range in the premium segment. The three high-performance materials in the VarioPur series are based on thermoplastic polyurethanes (TPU/AU). "Both the abrasion and the extrusion resistance are at least five times higher than those of the traditional material NBR, which has a Shore A value of 90," said a company spokesperson. "Furthermore, the three TPU materials provide gas tightness and a high level of tolerance to a wide range of gases - from oxygen and nitrogen to all of the synthetic hydrocarbons. They exhibit no brittleness as a result of exposure to ozone or oxygen. They feature low swelling in mineral oil, hydraulic media and lubricating greases, generally good chemical resistance and enhanced dynamic behavior (blow-by behavior)."
In addition to the universal TPU material COG VarioPur 195, COG has introduced two TPU sealing materials. As well as the complex properties of a high-performance TPU compound, COG VarioPur 295 additionally provides low temperature flexibility down to -50 °C.
"COG VarioPur 395's strength lies in its hydrolysis resistance: a quality that simply does not exist in this form in other TPU materials," said the spokesperson. "This TPU is extremely stable in aqueous media, including oil-water emulsions (HFA), water-oil emulsions (HFB) and aqueous polyglycol solutions (HFC). It also exhibits outstanding resistance to other critical media, including biologically degradable oils (HEES and HETG), hardly inflammable liquids, triglycerides and synthetic esters of hydraulic oils or water-free media."
The COG VarioPUR TPUs are used in applications in mobile and industrial hydraulics, gas processing technology and gas spring technology, pneumatics, valve technology, the chemical industry and pharmaceutical processing technologies.
For more information contact:
Herr Henning Wrage
COG - C. Otto Gehrckens GmbH & Co. KG
Gehrstuecken 9
Pinneberg, 25421
Germany
49 4101 5002 0
h.wrage@cog.de
www.cog.de
IMTS 2016 Booth E-5082
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