Filimu ya polypropylene yolunjika mbali imodzi (filimu ya BOPP mwachidule) ndi chinthu chabwino kwambiri chopakira chomwe chimaonekera bwino. Filimu ya polypropylene yolunjika mbali imodzi ili ndi ubwino wa mphamvu zakuthupi ndi zamakanika, kulemera kopepuka, kusapha poizoni, kukana chinyezi, kugwiritsa ntchito mosiyanasiyana komanso kugwira ntchito bwino. Malinga ndi ntchito zosiyanasiyana, filimu ya polypropylene yolunjika mbali imodzi ingagawidwe m'magulu awiri: filimu yotseka kutentha, filimu yolemba chizindikiro, filimu ya matte, filimu wamba ndi filimu ya capacitor.
Polypropylene ndi chinthu chofunikira kwambiri popanga filimu ya polypropylene yozungulira biaxial. Polypropylene ndi utomoni wopangidwa ndi thermoplastic wokhala ndi magwiridwe antchito abwino kwambiri. Uli ndi ubwino wokhala ndi kukhazikika bwino, kukana kutentha kwambiri komanso kutchinjiriza bwino magetsi, ndipo ukufunika kwambiri m'mafakitale. Mu 2021, kutulutsa kwa polypropylene (PP) m'dziko langa kudzafika matani 29.143 miliyoni, kuwonjezeka kwa chaka ndi chaka kwa 10.2%. Popindula ndi kupezeka kokwanira kwa zinthu zopangira, makampani opanga mafilimu a polypropylene ozungulira biaxial m'dziko langa apita patsogolo mwachangu, ndipo kutulutsa kwake kwapitirira kuwonjezeka. Malinga ndi deta yochokera ku National Bureau of Statistics, kupanga mafilimu a polypropylene ozungulira biaxial m'dziko langa kudzafika matani 4.076 miliyoni mu 2021, kuwonjezeka kwa chaka ndi chaka kwa 8.7%.
Njira zopangira filimu ya polypropylene yolunjika mbali ziwiri zimaphatikizapo njira ya filimu ya tubular ndi njira ya filimu yathyathyathya. Chifukwa cha khalidwe losalingana komanso magwiridwe antchito ochepa a zinthu zopangidwa ndi njira ya nembanemba ya tubular, zachotsedwa pang'onopang'ono ndi makampani akuluakulu. Njira ya filimu yathyathyathya ikhoza kugawidwa mu njira yotambasula ya biaxial nthawi imodzi ndi njira yotambasula ya biaxial stepwise. Njira yotambasula ya biaxial step-by-step ndi motere: zopangira→extrusion→casting→longitudinal stretching→edge trimming→corona treatment→winding→large film roll→aging→slitting→fining product. Pakadali pano, njira yotambasula ya biaxial pang'onopang'ono imatengedwa ndi makampani ambiri chifukwa cha ubwino wake waukadaulo wokhwima, kupanga bwino kwambiri, komanso kuyenerera kupanga zinthu zambiri.
Filimu ya polypropylene yolunjika ku biaxial imagwiritsidwa ntchito kwambiri popanga zinthu zopaka monga zovala, chakudya, mankhwala, kusindikiza, fodya ndi mowa. Pakadali pano, filimu ya polypropylene yolunjika ku biaxial pang'onopang'ono yasintha pang'onopang'ono mafilimu wamba opaka monga polyethylene (PE), polypropylene (PP), ndi polyvinyl chloride (PVC). Dziko langa ndi dziko lachiwiri lalikulu kwambiri padziko lonse lapansi lopaka, ndipo kufunikira kwa ma CD kukupitilira kukula. Malinga ndi ziwerengero kuchokera ku China Packaging Federation, ndalama zomwe mabizinesi ambiri amapeza kuposa kukula komwe kwatchulidwa mumakampani opaka ma CD mdziko langa zidzafika pa 1,204.18 biliyoni yuan mu 2021, kuwonjezeka kwa chaka ndi chaka kwa 16.4%. Ndi kukula mwachangu kwa makampani opaka ma CD mdziko langa, filimu ya polypropylene yolunjika ku biaxial idzakhala ndi mwayi waukulu pamsika ngati zinthu zofunika zopaka ma CD.
Akatswiri a mafakitale ochokera ku Xinsijie adati kupindula ndi kupezeka kokwanira kwa zinthu zopangira komanso kukhwima kwa ukadaulo wopanga, kuthekera kwa chitukuko cha makampani opanga mafilimu a polypropylene m'dziko langa ndi kwakukulu. Kukula mwachangu kwa makampani opanga mapepala kudzalimbikitsa kukula kwa msika wa mafilimu a polypropylene m'dziko langa. Chifukwa cha kuzama kwa lingaliro la kugwiritsa ntchito zinthu zobiriwira, ogula adzapititsa patsogolo zofunikira za zinthu zopangira mapepala, ndipo filimu ya polypropylene yosunga mphamvu komanso yosamalira chilengedwe idzakhala yofunika kwambiri pamsika.
Nthawi yotumizira: Okutobala-09-2022