Ama-polyethylene liners, ajwayele ukubizwa ngokuthi ama-poly liners, angama-liners epulasitiki aguquguqukayo aklanyelwe ukulingana esitsheni esiphakathi nendawo senqwaba (i-FIBC noma isikhwama senqwaba). Ukubhekana nezinto ezibucayi namakhemikhali kuvame ukudala izidingo zokuvikela kabili. Ama-poly liners asebenza kunoma yisiphi isimo ngemikhiqizo eningi ebucayi. I-Poly liner ingasiza ukuvikela isikhwama senqwaba uqobo kanye nomkhiqizo ngaphakathi. Kuyasiza kakhulu ukuhambisa kakhulu ukuthola izimpushana ezivuzayo futhi kwenzeka ukungcoliswa. Izinzuzo zezikhwama eziningi ezibhanqwe nge-poly liner zibandakanya isithiyo somoya-mpilo, isithiyo somswakama, ukumelana namakhemikhali, izakhiwo ezimelana nokuma, ukumelana nokushisa namandla amakhulu njll. Izinsimbi ze-FIBC zingafakwa ezikhwameni eziningi noma zingenziwa ngamathebhu okunamathisela avumela ama-liners ukuthungwa, ukuboshwa noma ukunamathiselwa esikhwameni.
Izinhlobo ezine ezivame kakhulu zama-bag poly liners yilezi:
Izendlalelo ze-Lay-Flat: Zimile okwe-cylindrical, zivulwe phezulu, kanti ngezansi kuvame ukuvalwa ngokushisa
· Amabhodlela entamo webhodlela: Amabhodlela entamo amabhodlela aklanyelwe ngokukhethekile ukulingana isikhwama sangaphandle kufaka phakathi ispout phezulu nangaphansi
Izindwangu zeFomu-Fit: Izindwangu zefomu zenzelwe ngqo ukulingana isikhwama sangaphandle kufaka phakathi phezulu naphansi
· I-Baffle –inside Liners: I-baffle liner ifomu elungiselelwe i-FIBC futhi lisebenzisa ama-baffles angaphakathi ukugcina umumo oyisikwele nokuvikela ukuqhuma kwesikhwama
Izikhwama ze-FIBC ezinama-poly liners zisetshenziswa kakhulu ezimbonini nasezinsizeni ezahlukahlukene lapho kusetshenziswa khona ama-FIBC, ikakhulukazi imboni yokudla kanye nemboni eyenza imithi okuyimikhiqizo ebucayi. Zingabhanqwa kalula nama-FIBCs ukuhlinzeka ngendwangu yokuvikela eyengeziwe yomkhiqizo nesikhwama senqwaba ngokumelene nomswakama nokungcoliswa.