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With the opening of the new Polyurethane Laboratory in 2001, Trelleborg Sealing Solutions has made clear at which status-level we value this material group, which is becoming more and more important in dynamic sealing technology. Since then, we have been able to clearly increase our efficiency and improve our performance in the field of PUR-development. At present, we can offer our customers:

• The selective compilation of a resourceful material assortment in order to clearly increase the performance of our standard products.
• Development focused on customer's requirements, i.e. tailor-made PUR-materials.
• All prerequisite resources necessary to specifically tackle the development of high-performance materials in our Polyurethane Laboratory:
  1. Chemical processing reactor with the option of regulated temperature control
     • Formation of the pre-polymer

  2. Cross-linking station equipped with a high-speed agitator
     • Blending of the pre-polymer with the cross-linking agent

  3. Temperature controlled casting plate
     • Solidification of the mixture

  4. Granulating machine to comminute the semi-finished PUR-material
  5. We employ specially designed tools for series-identical fabrication of prototypes and testing specimens used for laboratory investigation.
  6. In addition, we also have an injection-moulding machine which is identical with the machine used in regular production and which features additional software options for Quality Assurance and process adaptability surveys.
  7. We have highly qualified staff with years of experience at our disposal.

• We can produce thermoplastic polyurethanes (TPUs) with regard to their chemical, physical, tribological and mechanical properties on a semi-industrial scale by creating task-adapted molecular structures.
• The three basic components, isocyanate, polyol and cross-linking agent, are carefully varied during chemical synthesis. Additives are also incorporated in some cases. With the three mentioned constituents we can take influence on the damping properties, the permanent set, rigidity, the Young's modulus, resistance against extrusion, the behaviour at high and at low temperatures, chemical resistance and abrasion behaviour. The formulations and measurement readings of the material tests are recorded exactly. We can, for example, construct stress-/elongation-curves derived from the tensile tester by applying our FEM calculation system. We can therefore simulate the sealing behaviour with regard to certain criteria, so that based on predefined piece-geometry, conclusions may be drawn regarding the optimally suitable material.
• The future generations of improved TPUs may be typically found in the following application fields:
  1. Seals for rods and pistons used in pneumatics and hydraulics
  2. Scraper elements
  3. Rotary seals
  4. Valves
  5. Machined parts used in engineering, especially with multifunctional features