Pyongyang Han Tok Su University of Light Industry has developed five kinds of additives for recycling any kinds of plastic waste.
Generally, different qualities of plastic waste do not mix well and recycled products cannot ensure quality if a small amount of other plastic is added.
Therefore, the plastic waste of pure quality was mainly used in recycling.
Newly-developed recycled additives, however, help mix and process different kinds of plastic waste into quality recycled plastic, free from any particular selection process.
Researchers first developed an additive for recycling used foodstuff packing made from PE-PP complex vinyl sheet which is hard to reprocess and therefore a lot of amount of which is thrown away.
Also they completed the research into PE-PET recycling additive for producing the mixture for manufacturing plastic bottle by recycling the waste bottle made of polyethylene and polyethylene terephthalate.
And they developed an additive that can reprocess the toothbrush as a whole. In the past only the handle part was reprocessed by cutting off the bristle.
The new additives include those for recycling the used outer box of electronics products including TV, waste sandals and slippers made from ethylene of copolymer.
Researchers put five kinds of plastic recycling additives on trial according to qualities between June last year and August this year. It was confirmed that the physical properties of injection products and extruded products using recycled materials have improved 1.2 to 1.3 times on average and the recycling costs have been lowered by over 30-40 percent.
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