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AMORAN (Amorphous Orientation Analyser)

AMORAN provides contactless, high speed, high precision measurements of "amorphous orientation" of polymer fibres and sheets. This value characterises the state of molecular order in the non-crystalline regions of the material, which strongly influences numerous key properties (for example strength, modulus, diffusion of additives).

AMORAN is ideally suitable for the: 
- development, control and optimisation of production processes;
- research on the development of structure;
- monitoring of the input material of critical processes (dyeing, drawing stages).


Fig. 1: the Amorphous Orientation Analyser AMORAN


  • Development, quality control and optimisation of production processes.
  • Research of the development of fibre structure.
  • Monitoring of the input material of critical processes (dyeing, drawing stages).
  • Sensor for PET fibres and films.
  • Sensor for PET, PP, PA6.6, PA6 und PBT fibres and films, containing fluorescent probes.
  • Measurements of orientation moments of uniaxial materials in the direction of the draw axis.
  • Measurements of orientation ratios of biaxial materials in the direction of the draw axes.
  • Detection of the draw axes (optional).
  • Light source.
  • Chopper (only PET sensor).
  • Special camera with power supply.
  • RS-232 interface.

Fig. 2: typical on line display of the data acquisition software, when measuring PET films

Application Fields
Polymer research:
the contactless measurements increase the know-how and know-why of structure development in the production process.

Process development, maintenance:


by the instant characterization of amorphous orientation, the development of processes and the maintenance of production machines is simplified. If either the costs of experimental time at a production line and the costs of an offline analysis are taken into account, the sensor will be amortised rapidly.

Drawing processes:


monitoring the incoming material with AMORAN allows the detection of material of minor quality or reduced processibility.
Quality control:
the measurements are usable as feedback signals of a quality control loop in the production process.


Example Result ()

Measurements during PET-fibre spinning experiments at the Institut für Chemiefasern ITCF (Institute for Man-Made Fibers) in Denkendorf showed that the non-crystalline orientation could be measured with high accuracy and reproducibility. The orientation values correlate with technically important fibre properties. Figure 3 shows the correlation between non-crystalline orientation and tenacities of undrawn PET yarns at spinning speeds between 2000 and 4000 m/min (different tenacity values indicate in this case structural differences, which will influence following drawing or texturing processes). The results suggest, that this technique allows the prediction of processibility and final yarn properties at a very early stage of production. A collection of further examples from the investigations performed at the ITCF are accessible here.

Fig. 3: amorphous orientation of as-spun PET fibres versus tenacity

Further information about the measurement principle and the application of this sensor is available in the literature.

If you are interested in further information, a demonstration, an adaptation of this sensor or a development of a solution of your measurement problem, please contact:

mail@opos.de or:

OPOS Optical On Line Sensors
Hertzstr. 164b
D-76187 Karlsruhe / Germany
Tel +49 (721) 971305-0
Fax +49 (721) 971305-1

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