Ifilimu yokwelula, eyaziwa nangokuthi ifilimu enwetshiwe kanye nefilimu yokunciphisa ukushisa, yaqala ukukhiqizwa e-China kusetshenziswa i-PVC njengento eyisisekelo kanye ne-DOA njenge-plasticizer kanye nomphumela wokuzinamathisela wefilimu enwetshiwe ye-PVC. Ngenxa yezinkinga zemvelo, izindleko eziphezulu (ezihlobene ne-PE, indawo encane yokupakisha ngeyunithi ngayinye) kanye nokunwebeka okubi, ifilimu ye-PE stretch yaqedwa lapho ukukhiqizwa kwasekhaya kuqala ngo-1994-1995. Izinto eziyisisekelo ziyi-LLDPE, okuhlanganisa i-C4, i-C6, i-C8 ne-metallocene PE (MPE).
Ama-Fectures
Ikhiqizwa kusetshenziswa inhlaka ye-LLDPE engenisiwe kanye ne-tackifier izithasiselo ezikhethekile zefomula ehambisanayo, futhi ingakhiqiza ifilimu egoqayo enemisebenzi eminingi ngesandla, umshini wohlobo lokumelana, umshini wohlobo lokunwebeka ngaphambili, i-anti-UV, i-anti-static kanye ne-anti-rust. Inezinzuzo ezilandelayo:
1. Ngokusebenzisa okokusebenza okuhlangene kwe-double-layer co-extrusion, ifilimu ejikajikayo ecindezelwe ingakhulisa izici zayo yonke i-polymer ngayinye, ukubonakala kwayo, amandla aqinile, nokumelana nokubhoboza, ifinyelele esimweni esifanele endaweni yokuncibilika.
2. Inezici ezinhle zokudonsa, ukukhanya okuhle, nokuqina okufanayo.
3. Inobude besikhathi eside, ikwazi ukuqina, imelana kahle nezinyembezi evundlile, kanye nethanga elihle kakhulu lokuzinamathelisa.
4. Kuyinto evumela imvelo ukuthi iphinde isetshenziswe kabusha, ayinambitheki, ayinabuthi, ingaba ukudla okupakishwe ngokuqondile.
I-5. ingakwazi ukukhiqiza imikhiqizo yokunamathisela ohlangothini olulodwa, ukunciphisa umsindo okhishwe ngesikhathi senqubo yokujika nokwelula, ukunciphisa uthuli nesihlabathi ohlelweni lokuhamba nokugcinwa.
Isicelo
1. Amaphakheji avaliwe
Lolu hlobo lokupakisha lufana nokufakwa kwefilimu enciphayo, lapho ifilimu igoqwa khona ephalethini ukuze ihlanganiswe yonke, bese kuba izibambi zokushisa ezimbili zivala ifilimu kuzo zombili iziphetho ndawonye. Lolu wuhlobo lokuqala lwefilimu elisongayo olusetshenziswayo futhi luholele ekwakhiweni kwezinhlobo eziningi zokupakisha.
2. Ukupakishwa kobubanzi obugcwele
Lolu hlobo lokupakisha ludinga ukuthi ifilimu ibe banzi ngokwanele ukumboza i-pallet, enesimo esijwayelekile, ngakho-ke ifaneleka ukusetshenziswa ngobuningi befilimu obuyi-17 kuya ku-35μm.
3.Ukufakwa ngesandla
Lolu hlobo lokupakisha luwuhlobo olulula kakhulu lokupakisha ifilimu yokugoqa, ifilimu efakwe eshalofini noma ngokubanjwa ngesandla, ngokuzungezisa i-pallet noma ifilimu ezungeze i-pallet. Isetshenziswa kakhulu ekupakishweni kabusha kwama-pallets asongwe ngemuva kokuphuka, kanye nokupakishwa kwe-pallet evamile. Lolu hlobo lokupakisha luhamba kancane futhi ukujiya kwefilimu okufanelekile kungu-15 kuya ku-20 μm.
