Research & Development Laboratory

Tumedei employs a number of rubber technology experts who optimise the performance of the materials to meet the demands of the individual client.

By developing physical properties based on specific end-use applications we can achieve significant performance improvements.

Examples of areas where material properties can be developed include:

  • Resistance to heat ageing.
  • Resistance to fluid ageing.
  • UV and weather resistance.
  • Low temperature flexibility and seal performance.
  • Coefficient  of friction.
  • Lubrication of the incorporated composites.
  • Materials approved for drinking water.
  • Long-term performance services.
  • Thermal and electrical conductivity.
  • Toxicity and biocompatibility.

Tumedei has a well-equipped laboratory facility for testing elastomers, TPR and thermoplastic engineering. Test capabilities include:
De Mattia Fatigue (ASTM D813)

  • Adjustable strain rates and ability to test fatigue from ambient to +200° C
  • Used for fingerprinting compounds for quality control purposes.

DMTA – Dynamic Mechanical Thermoanalyser (for example . ASTM D4065)

  • It subjects the polymer to mechanical tension at different frequencies, stresses and temperatures.
  • It can provide data on the effects of ageing and the level of cure.
  • It can provide data for Tg, Tm and relaxation of tensions. These properties are important for choosing the correct plastic for hot water applications.

Thermal Analysis – TGA (ASTM E1131)

  • A sample is taken and, depending on the temperature, the weight is monitored. As the different elements of the composite evaporate, their weight is recorded.
  • Used for  digital fingerprinting compounds for quality control purposes.

Thermal Analysis – DSC (for example ASTM D3417)

  • Digital prints of the polymers using a temperature map of their transitions: Tg, Tm, etc.
  • To determine the correct working temperature:- at what temperature it melts, on what interval of amplitude. (su che ampiezza d’intervallo).
  • To determine the correct working temperature:- when is the glass transition? Above the Tg the materials are softer, below are more rigid. Effects on the end use.

FTIR infrared spectrometer (for example ISO4650)

  • Measures the absorption of infrared light to determine the elements and compounds present in a material. It is very useful for quality control and material identification.
  • Useful to understand the reasons behind the failure of a product. For example, when a polymer has been incorrectly exposed to a material that degrades it.

Fluid resistance (effects of liquids) as per ASTM D471

  • Individual immersion test bench with automatic temperature control and chemical dosing.
  • Conditions using stagnant water and with current, important for materials that develop a film during degradation. Able to detect subtle differences between types of polymers.

Static mechanical test

  • Tensile strength as per ASTM 412.
  • Tear resistance as per ASTM 624.
  • Bending module as per ASTM 412.
  • % elongation as per ASTM 412.
  • Micro IRHD hardness ISO48 and Shore A as per ASTM 2240.
  • Specific weight (density) as per ASTM 792.
  • Permanent deformation from compression and tension as per ASTM 395.
  • Tension relief as per ASTM 1646. (stress relaxation ?)
  • Ageing from high and low temperature as per ASTM 573.
  • Ageing by fluid immersion per ASTM 471.
  • Rheology of compounds as per ASTM D2084.
  • Bounce resilience test measurements as per DIN 53512.
  • Mullen burst pressure test.

Contact-free dimensional measurement for product validation using optical measuring device (Tesa and Keyence Visio) for rubber parts fitted with a TTP Renishaw for plastic/metal parts.

Accuracy at 3 microns.

The measurement process can be programmed for better repeatability. It is possible to exchange files with solidworks, which allows to create a 3D model of the parts.