Ifilimu ye-polypropylene (BOPP) eqondiswe ku-Biaxial uhlobo lwefilimu yokupakisha eguquguqukayo. Ifilimu ye-polypropylene eqondiswe ku-Biaxial overwrap inwetshwa emshinini naseziqondisweni eziphambeneyo. Lokhu kuphumela ekuqondisweni kweketanga lama-molecule kuzo zombili izinhlangothi.
Lolu hlobo lwefilimu yokupakisha eguquguqukayo lwenziwa ngenqubo yokukhiqiza ishubhu. Ibhamuza lefilimu elibunjwe njengethubhu liyafuthwa bese lishiswa lize lifike endaweni yalo yokuthambisa (lokhu kuhlukile endaweni yokuncibilika) futhi linwetshwa ngemishini. Ifilimu inwebeka phakathi kuka-300% - 400%.
Ngaphandle kwalokho, ifilimu ingalulwa ngenqubo eyaziwa ngokuthi ukukhiqizwa kwefilimu yohlaka lwe-tenter. Ngale ndlela, ama-polymer akhishwa ku-cast roll epholile (eyaziwa nangokuthi ishidi lesisekelo) bese edonswa ngendlela yomshini. Ukukhiqizwa kwefilimu yohlaka lwe-tenter kusebenzisa amasethi amaningana emiqulu ukudala le filimu.
Inqubo yohlaka lwe-tenter ngokuvamile yelula ifilimu ngo-4.5:1 ohlangothini lomshini kanye no-8.0:1 ohlangothini oluphambene. Nokho, izilinganiso zingalungiseka ngokuphelele.
Inqubo yohlaka lwe-tenter ivame kakhulu kune-tube variant. Ikhiqiza ifilimu ecwebezelayo kakhulu necacile. Ukuma kwe-Biaxial kwandisa amandla futhi kuphumela ekuqineni okuphezulu, ukucaca okuthuthukisiwe, kanye nokumelana okuphezulu namafutha namafutha.
Ifilimu ye-BOPP iphinde ibe nezakhiwo ezivimbelayo ezengeziwe emusi kanye nomoya-mpilo. Ukumelana nokushayisana kanye nokumelana nokuqhekeka kwe-flex kungcono kakhulu ngefilimu ye-BOPP uma kuqhathaniswa ne-polypropylene shrink.
Amafilimu e-polypropylene overwrap aqondiswe ku-biaxial avame ukusetshenziswa kakhulu ekupakisheni ukudla. Athatha indawo ye-cellophane ngokushesha ukuze kusetshenziswe okuhlanganisa ukudla okulula kanye nokupakishwa kukagwayi. Lokhu kungenxa yezakhiwo zawo ezinhle kanye nezindleko eziphansi.
Izinkampani eziningi zikhetha ukusebenzisa i-BOPP esikhundleni samafilimu endabuko okunciphisa njengoba enezici ezithuthukisiwe kanye namakhono angcono kunalawo amafilimu okupakisha aguquguqukayo ajwayelekile.
Kufanele kuqashelwe ukuthi ukuvala ukushisa kunzima kumafilimu e-BOPP. Kodwa-ke, lokhu kungenziwa kube lula ngokumboza ifilimu ngemva kokucutshungulwa ngezinto ezivaleka ukushisa noma ngokuyikhipha ndawonye nge-co-polymer ngaphambi kokucutshungulwa. Lokhu kuzoholela efilimini enezingqimba eziningi.
Isikhathi sokuthunyelwe: Ephreli-04-2023