Njira Yopanga Mafilimu a BOPET: Chidule

Filimu ya BOPET, yomwe imadziwika kuti biaxially oriented polyethylene terephthalate, ndi filimu ya poliyesitala yopangidwa ndi kutambasula polyethylene terephthalate (PET) m'njira zake ziwiri zazikulu kuti apange filimu yosinthika mosiyanasiyana.

Idapangidwa ndi kampani yaku Britain ICI m'ma 1950s.

Ili ndi maubwino ambiri kulimba kwamphamvu, kukhazikika kwamankhwala ndi mawonekedwe, kuwonekera, kuwunikira, mpweya komanso zotchinga zamafuta, komanso kutsekemera kwamagetsi.

Pambuyo pazaka zachitukuko, malondawo adasintha kuchokera ku filimu yoyambira yokhayokhayo kupita ku filimu yaposachedwa ya capacitor, filimu yolongedza, filimu yoteteza zithunzi, ndi zina zambiri.

makulidwe ake akhoza kuchokera 4.5um mpaka 350 μm.

Kapangidwe kake kapangidwanso kuchokera ku ketulo yosavuta kupanga batch mpaka kutambasula kangapo komanso kutambasula nthawi imodzi.

Mawonekedwe ake adasinthanso kuchokera ku filimu yathyathyathya kupita ku filimu ya multilayer coextruded, filimu yolimbikitsidwa, ndi filimu yokutira.

Filimu ya polyester yakhala imodzi mwamitundu yomwe ikukula mwachangu pamsika.

Dehui FIlm ndi m'modzi mwa ogulitsa mafilimu a bopet ku China. Pakadali pano, timawapanga kwambiri ndi njira ziwiri zotambasulira njira ziwiri. Ndikukula kwa kuchuluka kwa ntchito yake, zofunikira zamakanema a polyester zikuchulukirachulukira. Kutikakamiza kuti tiwongolere bwino ndikukulitsa zotulutsa.

Njira yopanga mafilimu a BOPET

Tsopano, tiyeni tidziwitse njira yopangira mafilimu a bopet. General ndondomeko ili motere:

Kuyanika kwa utomoni wa PET → kutulutsa kunja → kutambasula kwautali kwa mapepala okhuthala → kutambasula mopingasa → kupiringa → kudula ndi kulongedza → kukonza mwakuya.

Pepala la PET losungunuka losungunuka

Pambuyo kusungunula-kutulutsa ndikuyika pulasitiki utomoni wouma wa PET, kenako wosakanikirana ndi zosefera zowoneka bwino komanso zosakanizira zokhazikika, zimatumizidwa kumutu wamakina ndi pampu ya metering. Kenako utakhazikika ndi quenching wodzigudubuza Mu wandiweyani magawo ntchito.

Extrusion wa biaxially anatambasula

PET wandiweyani filimu Biaxial (njira) kutambasula ndi kutambasula filimu kapena pepala extruded kuchokera extruder pa kutentha kwina. Mu longitudinal ndi yopingasa malangizo kupanga maselo unyolo.

Nkhope ya kristalo yomwe iyenera kutsimikiziridwa ndi yolunjika, ndiyeno chithandizo cha kutentha chikuchitika pa nkhani ya kutambasula.

Kanema wotambasulidwa wa biaxially, chifukwa cha mawonekedwe a magawo a maselo, amawongolera crystallinity.

Chifukwa chake imatha kukulitsa mphamvu zamakokedwe, zotanuka modulus, mphamvu zamakasitomala, kung'ambika, kuwongolera kuzizira, kuwonekera, kutulutsa mpweya, kutsekemera kwamagetsi, ndi gloss.

Mafilimu ambiri athyathyathya amatengera njira yotambasulira yotsatizana yamtundu wa ndege.