Sekuyiminyaka engaba ngu-20 edlule sageza ngokucophelela izikhwama zase-cellophane ezisetshenzisiwe, sizifake emgodini, ukuzisebenzisa ngokuphindaphindiwe ukugcina imikhiqizo. Kodwa i-Stone Age isemva kwethu, ngoba manje kukhona ifilimu elula yokudla, ongayigcina ngayo imikhiqizo emisha kanye nesethulo sayo isikhathi eside, kokubili empilweni yansuku zonke nakwezokuhweba.
Namuhla, i-film ilulalwe isetshenziselwa izinhloso ezahlukene - ukupakisha izimpahla endaweni yokusebenzela, imikhiqizo yokupakisha uma ihlanganiswe kwinethiwekhi yokuhweba yokuthengisa, kanti futhi, ekhaya, uma kunesidingo sokuvimbela ukungena emoyeni kwemikhiqizo ukuze bangatholi iphunga leqrijini noma ngokuphambene nalokho , akazange amnike yena.
Kunezinhlobo ezimbili zefilimu yokudla - i-PVC ne-PE. Ake sithole ukuthi yiziphi izinzuzo abanakho nokuthi yini okufanele zikhethe ukusetshenziswa ekhaya, ngoba zinamanani ahlukene.
I-PVC ilula ifilimu
Isifinyezo se-PHV simelela kalula - yi-polyvinyl chloride. Sebenzisa le nto ukuze uxhumane nokudla, ngoba akuyona ingozi ngokuphelele kubantu, uma isetshenziswe kahle.
Inzuzo eyinhloko yefilimu ye-PVC yukuthi inesakhiwo esihle-esiyingozi, esingabonakali iso, okuvumela umswakama nomoya ukuba ugeleke. Le mhlaba iyadingeka lapho ukudla okufudumele kuhlanganiswa khona ku-ifilimu, njengokwibheka.
Isinkwa esinomfudumalo singagcwele ifilimu ngaphandle kokulinda ukupholisa okugcwele. Ngesikhathi sokupakisha, ama-condensation amafomu ngaphakathi ngaphakathi kwefilimu, okuphuma kancane kancane, imikhiqizo ibheka kakhulu futhi iyathengiswa ngokudayiswa ku-chain yokudayisa. Ngokukhiqizwa okukhulu kwemikhiqizo, kanye nama-rolls wefilimu elula, umthengisi usetshenziselwa yona. Lona ngumnikazi wesandla onesixazululo esinokunethezeka, umsebenzi owenza ngaso ngokushesha, futhi ukupakisha kunembile kakhulu.
Njengoba izindleko zezinto ezinjalo ziphakeme ngokwanele, isetshenziselwa kakhulu ezakhiweni zezimboni, kodwa ukusetshenziswa kwekhaya, okuthengwa okungeziphansi kwempahla yokupakisha, kodwa futhi kunezakhiwo ezingekho ngaphansi.
Sula ifilimu kusuka ku-polyethylene
Ngendlu siyithenga ifilimu engabizi kakhulu ye-polyethylene
Manje asikho isidingo sokukhetha ngokucophelela izitsha zokugcina ukudla esiqandisini noma ukugubha ubuchopho babo, ngoba kungcono ukuhambisa amasethi okudla, isibonelo, ukuphumula. Ngosizo lwefilimu elula, ungakwazi ukugubha umkhiqizo ngokuzenzekelayo futhi ungakhathazeki ngokuphepha kwawo.