Yiziphi izinto zezikhwama zokupakisha ukudla?

I-PE (i-Polyethylene)
Izici: Ukuzinza okuhle kwamakhemikhali, okungewona ubuthi, ukukhanya okuphezulu, futhi ukumelana nokugqwala ngama-acid amaningi nama-alkali. Ngaphezu kwalokho, i-PE iphinde ibe nesithiyo esihle segesi, isithiyo samafutha kanye nokugcinwa kwephunga elimnandi, okusiza ukugcina umswakama ekudleni. I-plasticity yayo nayo yinhle kakhulu, futhi akulula ukuyikhubaza noma ukuphuka njengempahla yokupakisha.
Isicelo: Ngokuvamile isetshenziswa emaphaketheni epulasitiki ukudla.

I-PA (Inayiloni)
Izici: Ukumelana nezinga lokushisa eliphezulu, ukumelana nokubhoboza, ukusebenza kahle kokuvimbela umoya-mpilo, futhi akuqukethe izithako eziyingozi. Ngaphezu kwalokho, impahla ye-PA nayo iqinile, imelana nokugqokwa, imelana nowoyela, inezakhiwo ezinhle zemishini nokuqina, futhi inokumelana nokubhoboza okuhle kanye nemiphumela ethile yokulwa nesikhutha kanye ne-antibacterial.
Isicelo: Ingasetshenziswa njengokupakisha ukudla, ikakhulukazi ukudla okudinga umgoqo ophezulu we-oxygen kanye nokumelana nokubhoboza.

I-PP (i-polypropylene)
Izici: I-PP yebanga lokudla ngeke ikhulule izinto eziyingozi ngisho nasemazingeni okushisa aphezulu. Ipulasitiki ye-PP isobala, inokucwebezela okuhle, kulula ukuyicubungula, inokudabuka okukhulu nomthelela wokumelana nomthelela, ayikwazi ukumelana namanzi, imelana nomswakama, futhi imelana nezinga lokushisa eliphezulu, futhi ingasetshenziswa ngokujwayelekile ku-100°C~200°C. Ngaphezu kwalokho, ipulasitiki ye-PP iwukuphela komkhiqizo wepulasitiki ongashiswa kuhhavini we-microwave.
Isicelo: Isetshenziswa kakhulu ezikhwameni zepulasitiki eziqondene nokudla, amabhokisi epulasitiki, njll.

I-PVDC (i-polyvinylidene chloride)
Izici: I-PVDC inokuqina komoya okuhle, ukubambezeleka komlilo, ukumelana nokugqwala, ukuphepha nokuvikelwa kwemvelo, futhi ihlangabezana nezidingo zokuhlanzeka kokudla. Ngaphezu kwalokho, i-PVDC nayo inokumelana nesimo sezulu esihle futhi ngeke iphele ngisho noma ivezwe ngaphandle isikhathi eside.
Isicelo: Isetshenziswa kakhulu ekupakisheni kokudla nesiphuzo.

I-EVOH (i-ethylene/vinyl alcohol copolymer)
Izici: ukukhanya okuhle nokucwebezela, izakhiwo eziqinile zokuvimbela igesi, futhi kungavimbela ngokuphumelelayo umoya ukuthi ungangeni ephaketheni ukuze ulimaze ukusebenza nekhwalithi yokudla. Ngaphezu kwalokho, i-EVOH ayikwazi ukumelana nokubanda, ayigugi, iyanwebeka kakhulu, futhi inamandla angaphezulu.
Isicelo: esetshenziswa kabanzi emaphaketheni aseptic, amathini ashisayo, izikhwama retort, ukupakishwa imikhiqizo yobisi, inyama, ijusi ekheniwe kanye nezicolisi, njll

Ifilimu ehlanganiswe ne-aluminium (i-aluminium + PE)
Izici: Ifilimu ehlanganiswe nge-Aluminium iyinto evumelana nemvelo. Ingxenye eyinhloko yesikhwama sokupakisha esiyinhlanganisela i-aluminium foil, eyisiliva-emhlophe, engenabuthi futhi ayinambitheki, imelana nowoyela futhi imelana nokushisa, ithambile futhi ipulasitiki, futhi inezithiyo ezinhle zokuvimbela nokushisa. Ngaphezu kwalokho, ifilimu eyenziwe nge-aluminium ingavimbela ukudla ekukhohlakaleni kwe-oxidative futhi igweme ukungcoliswa kwemvelo, kuyilapho igcina ubusha kanye nokunambitheka kokudla.
Isicelo: isetshenziswa kabanzi emkhakheni wokupakisha ukudla.