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 121 ºC.
