why are bottles and other plastics sorted according to their type and colour?
Answers
Following are the main reason for sorting out the plastics according to their color and type:
In automated sorting technique NIR(near infrared) offers great advantage among all wave sorting technique but not suited for dark coloured plastic and can be used on transparent bodies. In air sorting lighter particles are separated from heavier ones based on specific gravity. In electrostatic sorting method materials are separated based on electrostatic charge. In float-sink separation technique the plastics are in a fluid that has density in between the materials making it possible for less dense material to float and heavier to sink whereas sorting by selective dissolution is based on batch dissolution of mixed plastics using solvents. Hydrocyclones enhance the difference of specific weight by centrifugal force so materials with little difference can be separated as well. The present paper reviews the available literatures in the area of sorting of plastic waste for effective recycling.
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Answer:
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Explanation:
first the bottles and other containers are cleaned .then they r sorted based on the type and colour of the plastic.Each set is then sent to a shredding machine.....