Ebintu ebisookerwako mu bbokisi z’ekyemisana ez’obuveera biba bya polyethylene (PE) oba polypropylene (PP). Ebintu bino birina obuwangaazi obulungi, okuziyiza obunnyogovu, okuziyiza amafuta n’okutebenkera, era biba bitono nnyo, kale bikozesebwa nnyo mu mulimu gw’okupakinga emmere.
1. Polyethylene (PE) .
Polyethylene ye thermoplastic eya bulijjo ng’erina obugumu obulungi n’okuziyiza okukuba. Kyawulwamu ebika eby’enjawulo nga low-Density polyethylene (LDPE) ne waggulu-Density polyethylene (HDPE), ebikozesebwa okukola ebintu eby’obuveera eby’enjawulo, omuli ne bbokisi z’ekyemisana. Okutwalira awamu bbokisi z’ekyemisana eza polyethylene zirina obwerufu obulungi, zibeera nnyangu era si nnyangu kumenya, era zisaanira okutwala emmere.
2. Polypropylene (PP) .
Polypropylene ye semi-bugumu bwa crystalline nga buziyiza ebbugumu lingi, amaanyi g’ebyuma n’obutebenkevu bwa kemiko. Polypropylene lunch boxes zisobola okugumira ebbugumu eringi, kale zitera okukozesebwa okupakinga emmere eyeetaaga okubuguma oba okufukirira microwave.
