Izimo zenqubo yokukhiqiza
Ifilimu ye-Stretch iwuhlobo lwezinto zokupakisha ezisetshenziswa ngokuhlangana nomshini ojikajikayo, osetshenziselwa ukupakisha izinto ukuze zihambe kalula.Ezinsukwini zokuqala, amafilimu anwetshiwe e-LLDPE kwakungamafilimu ashaywayo kakhulu, futhi athuthukiswa ukusuka kungqimba olulodwa ukuya kwezimbili kanye nezendlalelo ezintathu.Ngokuthuthuka komnotho womphakathi, ifilimu enwetshiwe ye-LDPE isiphenduke umkhakha wemakethe.
Izinga lokushisa elincibilikayo lefilimu eyeluliwe livame ukulawulwa ku-250 ℃ ~ 280 ℃, izinga lokushisa lomqulu wokupholisa lilawulwa ku-20 ℃ ~ 30 ℃, ukungezwani okuguqukayo kufanele kube phansi, ngokuvamile ngaphakathi kwe-10kg, ukuze kube lula i-viscosity. i-ejenti Phuma ngenkathi unciphisa ukucindezeleka kwangaphakathi kwefilimu eqediwe.Lezi izimo zenqubo yokukhiqiza.
Ukulawula ukunamathela
I-viscosity enhle yenza ifilimu yokupakisha kanye nezendlalelo ezingaphandle kwezimpahla kunamathelene ukwenza izimpahla ziqine.Kunezindlela ezimbili eziyinhloko zokuthola i-viscosity: eyodwa ukufaka i-PIB noma i-masterbatch yayo ku-polymer;enye iwukuhlanganisa i-VLDPE.I-PIB iwuketshezi olushintshashintshayo lwe-viscous, amathuluzi akhethekile noma ukuguqulwa kwezinto zokusebenza kuyadingeka ukuze kwengezwe ngokuqondile, futhi i-PIB masterbatch ngokuvamile isetshenziswa.Kunenqubo yokufuduka kwe-PIB, okuvamise ukuthatha izinsuku ezintathu, futhi kuthintwa izinga lokushisa.Lapho izinga lokushisa liphezulu, i-viscosity inamandla;lapho izinga lokushisa liphansi, alinamathele kakhulu, futhi i-viscosity iyancipha kakhulu ngemva kokwelula.Ngakho-ke, ifilimu eqediwe igcinwa kangcono ebangeni elithile lokushisa (izinga lokushisa eliphakanyisiwe liyi-15 ℃ ~ 25 ℃).Ihlanganiswe ne-VLDPE, i-viscosity impofu kancane, kodwa asikho isidingo esikhethekile semishini.I-viscosity izinzile, ayilawulwa yisikhathi, kodwa futhi ithintwa izinga lokushisa.Izinga lokushisa lifana ne-viscous uma izinga lokushisa lingaphezulu kuka-30°C, futhi i-viscosity iba yimbi kakhulu lapho izinga lokushisa lingaphansi kuka-15°C.Lungisa inani le-LLDPE kungqimba yokunamathisela ukuze ufinyelele i-viscosity oyifunayo.Le ndlela isetshenziswa kakhulu ekuhlanganiseni okunezendlalelo ezintathu.