+49 30 6392 7816


PLASTIC & POLYMERS

About

At ColVisTec, we provide greater quality control for manufacturers that work in the plastics & polymers industry. Our company detects all of the typical ranges of problems that might arise during the manufacturing process, such as color matching, process stability, polymer composition, yellowing, and other forms of quality degradation, hardware performance due to wear and tear, screw optimization, residence time measurement, etc. Below you can find more details on the technical side of the aforementioned problems, including data that shows you how and when exactly you can discover those issues with our hardware & software solutions installed to your plant. With our wide portfolio of precise instruments, you can be sure to receive continuous and correct measurements that ensure your compliance with government regulations and product specifications.


IMPROVE YOUR PROCESS MONITORING WITH OUR INLINE UV-VIS SPECTROPHOTOMETRY-BASED SYSTEM


img

Our inline UV-Vis spectrometry-based technology continuously detects all the factors that influence your manufacturing process' accuracy & efficiency. You can automatically analyze all your production output directly in melt, liquids, powder, and paste without any preparation and onerous sampling, which can significantly increase the overall productivity and flexibility of your technology plant.

img

img

FIBER OPTIC PROBES

HOW WE ASSEMBLE OUR TECHNOLOGY


ColVisTec's technology doesn't interfere with the production process; we install our fiber optic probes to the existent hardware already connected in your factory. Our probes can handle substantial distances (up to 20 meters) between the spectroscopy system and your measurement point. One system can be used for two independent production lines at a time. It allows you to continuously measure the manufactured substance every 10 seconds or less directly in the process without sampling, without interrupting the production line, and without delays. This, in turn, maximizes the efficiency of the manufacturing process and minimizes costs at the same time.

img   img

REFLECTION POLYMER MELT PROBE (RPMP)

  1. Probe Tip: Standard Dynisco Thread 1/2”-20 UNF
  2. Sapphire Window (Self Cleaning by Material Flow)
  3. Separate Fiber Optic for Easy Calibration
  4. Temperature: ≤ 400 °C
  5. Pressure: ≤ 200 bar
img (1) The RPMP probe installed on (2) the extruder. For example, in the die-plate.
  1. Illumination with Xenon Flash Lamp
  2. Six Circumferential Positioned Glass Fibers for Illumination
  3. Center Positioned Fiber for Reflectance
  4. Standard Fiber Length: 5 m
  5. Maximum Fiber Length: 20 m

APPLICATION USE

RPMP probes are used to measure opaque materials such as molten polymers, chemicals, pharmaceuticals, as well as powders. This probe is specially designed to withstand the high temperature and pressure often found in extruders, though it can also be installed in other types of manufacturing machinery.


INSTALLATION OF THE RPMP PROBE BODY IN EXTRUDER

img
1
    img
2
 
img
3
    img
4
 
1. A free thread 1⁄2“-20 UNF is required
2. Fix the probe body in the thread
3. Place and fix fiber optic in the probe body
4. Probe tip with the sapphire window is ca. 5 m.m in the
extruder body

RECOMMENDED PROBE LOCATIONS FOR THE RPMP BODY FITTED IN EXTRUDERS

img  
img
 
img
  img
 
img


PROCESS DEVELOPMENT IN EXTRUSION

INNOVATIVE, EASY, AND FAST RESIDENCE TIME DETERMINATION

img
  • 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

PROCESS DEVELOPMENT IN EXTRUSION

FIND THE PERFECT SCREW CONFIGURATION

SCREW CONFIGURATION #1
UNEVEN PROCESSING FOR ALL THREE SPEEDS
img
SCREW CONFIGURATION #2
UNEVEN PROCESSING FOR ALL THREE SPEEDS
img
  • 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)
Made in cooperation with Leistritz Extrusionstechnik GmbH, Nürnberg

RESEARCH & DEVELOPMENT

FIND THE OPTIMAL SPEED WINDOW FOR YOUR FEEDER ELEVATION

SPEED 300 rpm
PERFECT DISPERSION & HOMOGENEITY
img
It's the optimal speed (300 rpm) for this recipe.

img
    This speed (600 rpm) is too fast for this recipe.
  • Identical base material
  • Two different rates of speed
  • Five concentrations

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)
Made in cooperation with Leistritz Extrusionstechnik GmbH, Nürnberg

INLINE MEASUREMENT WITH A SPECTROPHOTOMETER

OSCILLATION OF L* AND B*

HOMOGENOUS RESULT
img
Changing of mixing elements (screw) solved the problem.

img
Detected via our inline UV-Vis spectrophotometry-based process monitoring system.

INLINE MEASUREMENT WITH A SPECTROPHOTOMETER

THE BLENDING PROBLEM WHEN USING DIFFERENT MATERIALS

13:05 to 17:30h
img
  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.

DO YOU HAVE ANY QUESTIONS? ASK US TODAY!