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High level
material plastic recycling demands that plastic materials must be
sorted according to various types IoSys - Dr. Timur Seidel e.K.
has taken part in solving the problem. A stationary but flexible
Infra-Red optic was developed by IoSys It will help to make further
amounts of waste polymers available for re-use.
With the technique of the so-called near Infrared spectrometry (NIR) it is
possible to identify plastics coming from the household-, engineering
electronics and automotive application fields. It allows direct analysis
of non-dark-colored plastic parts (films, foils, bottles, granules,
solid, foamed) and other materials like carpets and textiles.
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.
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For plastic
identification the sample is simply pulled through the open U-shape of
the unit below the IR light source and the measuring head. Within a
few milliseconds the identified polymer is shown on the turnable LCD-touchdisplay
mounted on top of the unit. The portable device which can be carried
on its handle includes the optical NIR-system and the
computer, which controls and |
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evaluates the
identification process. Parameter settings
like
model selection can be set
by the LCD-touch-
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display. Additional connections like a
serial interface allow external data transfer. As optional features a
battery operated Mini-Plotter printing out the results and an
Relay-interface board generating output signals for sorting systems
are available . (dimension in mm: 480x160x360, weight: 6 kg, power
supply: 100-230 Volt~, 50/60 Hz). |
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Identification
of different plastic types is the result of a trained pattern
recognition. After the measurement of the
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plastic
sample the optical information (absorption bands of overtone- and
combination vibrations) are processed by a neural network. The result
of the calculation is a list of the most probable polymer type
identified within a probability of 0 and 100%. |
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For detailed
spectra viewing, loading, saving, editing spectra etc. an external
keyboard and a VGA-Display can be connected. This possibility allows
to develop own applications easily (e.g. identifications
of carpets, |
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textiles,
food etc.) or to find out
particularities (mixtures).
With the help of
the Near Infra-Red optic it is possible independently of surface
structure, moisture and contaminations to analyze within 1 second
as following:
PA6x, PA12, PE, PP, ABS, PS, PPO PCA, PBT, PET, PC,
PMMA, POM, PVC, ETFE
According to
different demands in recycling matters, customers can arrange to have the
system calibrated using their own samples. |
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