Mode of Action

Comparison of the heating periods of the most important plastics

STIR®-heaters create a special infrared with a phase wave length, especially in the range of 2-10 µm, which is nearly conform to the absorption of CH-groups in plastics. Due to this fact it is possible to speed up the heating processes in comparison to other methods, without any quality losses.

  • Energy saving of 40-50 %
  • Time saving of 60-80 %

Gelation of PO-Plastisol

By a changeover from moisture-hardening silicone to warm-hardening EP-adhesives in combination with a STIR®-heating system it is possible to extremely speed up the hardening of the adhesives. This method is used, e. g. in the automotive engineering.

  • Shortening of processing times to < 50%
  • Energy saving of 30-50%

Heating time of 1K-EP-adhesive

STIR® is much more effective in comparison to conventional processing with adhesives by convection heat or near-infrared, as the absorbance of the chemical molecules in the product are extensively conform to the emission spectrum of STIR®. Therewith it is possible to reduce the time- and energy effort without without compromising on quality.

  • Shortening of process times to < 50%
  • Energy saving of 30-50%

Hardening of 2K-EP-resin at 80°C

By adjustment of the emissions of STIR®-heaters with the absorption of the functional groups in fiber-glass reinforced epoxy resin, it is possible to control the curing process of the EP-laminating resin system much better and thereby reduce the time- and energy effort considerably.

  • Time saving and reduction of space up to 25%
  • Acceleration of the processing time

Application orientation and absorption bands

Groups of moleculesPhase wavelengths (µm)temperature (°C)Intersectional temperature (°C)
-CH3,5-3,1555-662608
-OH; -NH3,12-2,85654-744699
-NCO4,54-4,42365-383374
-NH25,91-6,0217-211214
-C=O5,88220220
aromatic ring6,25190190
-CO (epoxide ring)8,068787

The needed λ max. by the good as well as the strongest absorption bands for typical OH- and CH-groups are around 3 to 8 µm (application-oriented selection of the relevant functional ceramics).

Anwendungsbeispiel

Benefits:

  • Maximal emission of the heater in the phase wave length of 2 to 10 μm, which are adjusted on the plastics
  • Faster reaction times and thereby diminution and price-reduction of the equipment
  • Drastic improvement of the energy efficiency and thereby cost-reduction and reduction of CO2-emmisions.
  • Manufacturing on individual customer demands or module construction
  • Direct and constant heating (absolutely contactless)
  • Partial irradiation possible due to modular construction in selectable form
  • Variable 3D-geometry by horizontal and vertical heater

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