UMUYOBOZI W'UBUNTU
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Uruhu rwubusa rwa PU cyangwa uruhu rwa EPU kumifuka, sofa nibikoresho byo mu nzu
Uruhu rwa EPU cyangwa urashobora kubyita impuzu yubusa ya PU yimpu cyangwa uruhu rwa PU idashobora gukemuka kandi ibi bikoresho nibizamurwa byangiza ibidukikije byangiza ibidukikije bya PU.Imiterere ya EPU irahagaze kandi hamwe nimyaka 7-15 irwanya hydrolysis kandi ibi bikoresho bishya byangiza ibidukikije.
