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CASE STUDIES FOR INLINE SPECTROSCOPY



  1. LEARN FROM EXPERIENCE

OUR TECHNOLOGY WILL HELP YOU WITH

  1. Identification of optimal speed
  2. Determination of optimal dispersion and homogeneity
  3. Detection of dosage elevations – even very small elevations are detected
  4. Identification of off-spec batches (waste and contamination)

PROCESS DEVELOPMENT IN EXTRUSION


Example 1 - RTD measurement

INNOVATIVE, EASY, AND FAST RESIDENCE TIME DETERMINATION

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  • • Very short measurement interval of 500 ms
  • • Detection of residence time significantly faster and less cumbersome than old methods
  • • Try to do that with chromatography or the "ash method"
Made in cooperation with Leistritz Extrusionstechnik GmbH, Nürnberg


Example 2 - Comparing Screw Configurations

FIND THE PERFECT SCREW CONFIGURATION

SCREW CONFIGURATION #1
EVEN PROCESSING FOR ALL THREE SPEEDS
SCREW CONFIGURATION #2
UNEVEN PROCESSING FOR ALL THREE SPEEDS
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  • • Identical recipe
  • • Two screw configurations
  • • Three different rates of speed
  • • t0: Tracer added
  • • t1, t2, t3: First detection of color change at the die plate (depending on speed)

RESEARCH & DEVELOPMENT


Example 3 - Feeder improvement

FIND THE OPTIMAL SPEED WINDOW FOR YOUR FEEDER ELEVATION

SPEED 300 rpm
PERFECT DISPERSION & HOMOGENEITY
SPEED 600 rpm
IMPERFECT DISPERSION & HOMOGENEITY
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The optimal speed for this recipe is 300 rpm.
    This speed (600 rpm) is too fast for this recipe.
  • • Identical base material
  • • Two different rates of speed
  • • Five concentrations
Example 4 - Homogeinity

OSCILLATION OF L* AND b*
INHOMOGENOUS RESULT
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HOMOGENOUS RESULT
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Blending issue detected in L* and b*. Change of mixing elements solved the blending issue.
Example 5 - one screw configuration for two materials

THE BLENDING PROBLEM WHEN USING DIFFERENT MATERIALS

  1. Very homogenous result with this screw configuration and this material composition.
  2. Color and material change.
  3. Different material composition generates noisy results with the same extruder screw as before.
13:05 to 17:30h
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