Thermoplastic elastomers

Thermoplastic elastomers belong to the elastomer-family of materials. The elastomer-family consists of materials that can be highly expanded by exerting relatively little power. Because of their structure, elastomers have a high retractibility, which means the remaining deformation is very small.

HPU™

HPU is a hydrolysis-resistant thermoplastic polyurethane elastomer. HPU's high resistance to hydrolysis (hydrolysis is degradation in water) is rarely found in polyurethanes. It is stable in water up to 90°C and has an outstanding stability in mineral oil. Because of its resistance to hydrolysis, HPU can be used for water hydraulic and for applications in mining, tunnelling and manufacturing of presses. HPU is particularly recommended for the use in pure and seawater, for HFA and HFB fluids and biologically degradable hydraulic fluids (vegetable oils and synthetic esters) and food articles. HPU is KTW approved and complies with FDA standards. HPU also has excellent resistance against explosive decompression (ED). Temperature range from -20 ºC to 110 ºC.

LPU™

LPU is a thermoplastic polyurethane elastomer, which is modified for low temperature applications, with a minimum service temperature of - 50°C. For that reason LPU could be used under severe climatic conditions and for applications in freezing plants. LPU has an unusually high abrasive resistance, low compression set, high physical properties and tear strength. Products made from this material can be used in mineral oil and in bio- degradable hydraulic oils like vegetable oils and synthetic esters. Temperature range from -50 ºC to 110 ºC.

SPU™

SPU is a polyurethane that has been optimised in regard of the tribological characteristics (friction and wear), achieved by an addition of a synergetic combination of solid lubricants. This special material is therefore best suited for the most severe applications for water hydraulics or badly lubricated systems as well as in oil-free pneumatics. Chemical properties similar to HPU. Temperature range from -20 ºC to 110 ºC.

XHPU™

XHPU is a hard grade polyurethane (shore 60D) with chemical properties similar to HPU. This material is specially developed to replace PTFE-based materials in sliding seals/composite seals (our profiles K08, S09 and others) in systems with adequate temperature and media (up to 110ºC and media as for HPU). Used in composite seals, XHPU exhibits greater resistance to extrusion, less leakage, longer life-time and easier installation properties than the traditional PTFE-based seals. Temperature range from -20 ºC to 110 ºC.

XSPU

XSPU is a hard grade polyurethane (shore 57D) that has been optimised in regard of the tribological characteristics (friction and wear), achieved by an addition of a synergetic combination of solid lubricants. The chemical properties are similar to HPU. This material replaces PTFE-based materials for the same seals as XHPU, but is better suited in systems where low friction is crucial (water hydraulics, badly lubricated etc.). Temperature range from -20 ºC to 110 ºC.

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