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NIR-Spectrometer for Plastics

With the Infrared spectrometry (NIR) of the IoSys units it is possible to identify plastics coming from the household-, engineering electronics and automotive application feld. It allows direct analysis of non-dark-colored plastic parts (films, foils, granules, solid, foamed) and other materials like carpets and textiles. 

Identification of different plastic types is the result of a trained pattern recognition. After the measurement of the plastic sample the optical information are processed by a neural network. The result of the calculation is a list of the most probable polymer type identified within a probability between 0 and 100%. The software allows detailed spectra viewing, loading, saving and editing. This possibility helps to develop own applications.

The basic principle of the method is the diffuse near infrared reflection spectroscopy whereby characteristic absorption behaviors of different polymer types are used in that spectral region. The polymer sample is radiated with a infrared light and the reflected light of the measuring place is analyzed using a near infrared detector array.

With the Infrared spectrometry it is possible to identify relevant plastics and their mixtures independently of surface structure and contamination within 1 second as the following:

PA6/PA66, PA12, PE, PP, ABS, PS, PPO, SAN, PC+PBT, PC, PC+ABS, PBT, PET, PMMA, POM, ABS+PVC, PVC, PE+PA, PE+PET, PP+PET, PLA and Cellulose.