Process for the qualitative analysis of plastic particles

Details Process for the qualitative analysis of plastic particles Process for the qualitative analysis of plastic particles

1992-01-24

1993-10-26

Dzierzynski, Paul M.

Radiant energy

Luminophor irradiation

With ultraviolet source

2504591, 356317, G01N 2164

Patent

active

052568806

ABSTRACT:
A process and apparatus for the qualitative analysis of particles of various kinds of plastic which comprises passing said particles serially in a predetermined path, irradiating each particle with light of short wavelength from 180 to 500 nm, whereby each particle emits light radiation of a longer wavelength, and detecting such longer wavelength emissions for radiation intensities within a narrow wavelength range to form an emission spectrum, the emission spectrum generating a sorting signal.

REFERENCES:
patent: 4105333 (1978-08-01), Kaule et al.
Norman S. Allen, "Luminescence applications in commercial polymers," Dec. 2, 1978, pp. 907-913, in Chemistry and Industry.
Second International Symposium-Recycling of Metals and Engineered Materials, "Automatic Sorting of Non-Ferrous Metals from Automobile Shredders"; (1990).

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