The production process of polythene shopping bags the extrusion part only; the raw material is poured into a heating and melting unit of the extruding machine. This is heated, melted and converted to a passage (extrusion) and simultaneously cooled in the process by air generating apparatus. What passes through the cooling chamber is the polythene sheet being directed by some rollers, converting it into bales in the output unit.
https://hollalaycan.blogspot.com.ng/2014/04/a-business-plan-for-set-up-of-nylon-and.html
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Post time: Aug-10-2017