Ifilimu ye-polypropylene (BOPP) ejongeka kwi-Biaxially luhlobo lwefilimu yokupakisha eguquguqukayo. Ifilimu ye-polypropylene ejongeka kwi-Biaxially yoluliwe kwiindlela zomatshini kunye nezinqamlezileyo. Oku kubangela ukujongwa kwe-molecular chain kuzo zombini iindlela.
Olu hlobo lwefilimu yokupakisha eguquguqukayo lwenziwa ngenkqubo yokuvelisa ityhubhu. Iqamza lefilimu elimile okwetyhubhu liyafuthwa lize lifudumale lifikelele kwinqanaba lokuthamba (oku kwahlukile kwinqanaba lokunyibilika) kwaye lolulwa ngoomatshini. Ifilimu yolulwa phakathi kwe-300% - 400%.
Okanye, ifilimu inokolulwa ngenkqubo eyaziwa ngokuba yi-tenter-frame film manufacturing. Ngale ndlela, ii-polymers zikhutshelwa kwi-cooled cast roll (ekwaziwa ngokuba yi-base sheet) kwaye zitsalwe kwicala lomatshini. Ukwenziwa kwefilimu ye-tenter-frame kusebenzisa iiseti ezininzi zee-rolls ukwenza le filimu.
Inkqubo ye-tenter-frame ngokubanzi yolula ifilimu nge-4.5:1 kwicala lomatshini kunye ne-8.0:1 kwicala elinqamlezileyo. Oko kuthethiweyo, ii-ratios ziyakwazi ukulungelelaniswa ngokupheleleyo.
Inkqubo ye-tenter-frame ixhaphake kakhulu kune-tubular variant. Ivelisa ifilimu ekhazimlayo kakhulu necacileyo. Ukujongwa kwe-Biaxial kwandisa amandla kwaye kuphumela ekuqineni okuphezulu, ukubonakala okuphuculweyo, kunye nokumelana okuphezulu neoyile kunye namafutha.
Ifilimu ye-BOPP ikwaneempawu zokuthintela umphunga kunye neoksijini ezandisiweyo. Ukumelana nempembelelo kunye nokumelana ne-flexcrack kungcono kakhulu xa usebenzisa ifilimu ye-BOPP xa ithelekiswa ne-polypropylene shrink.
Iifilimu ze-polypropylene overwrap ezijongeka kabini zisetyenziswa kakhulu ekupakisheni ukutya. Zithatha indawo ye-cellophane ngokukhawuleza kwiindawo ezisetyenziswayo kuquka ukutya okulula kunye nokupakishwa kwecuba. Oku kungenxa yeempawu zazo eziphezulu kunye nexabiso eliphantsi.
Iinkampani ezininzi zikhetha ukusebenzisa i-BOPP endaweni yeefilimu zemveli ezincitshisiweyo njengoko zineempawu eziphuculweyo kunye nobuchule obuphezulu kunezo zeefilimu zokupakisha eziguquguqukayo eziqhelekileyo.
Kufuneka kuqatshelwe ukuba ukuvala ubushushu kunzima kwiifilimu zeBOPP. Nangona kunjalo, oku kungenziwa lula ngokugquma ifilimu emva kokucubungula ngezinto ezivaleka ngobushushu okanye ngokuyikhupha nge-co-polymer ngaphambi kokucubungula. Oku kuya kubangela ifilimu enamaleko amaninzi.
Ixesha lokuthumela: Epreli-04-2023