Multilayer coextrusion film
Pankhani zoyambitsa mafakitale, mawu, ma MOQ, kutumiza, zitsanzo zaulere, kapangidwe kazojambula, mawu olipira, ntchito zogulitsa pambuyo pogulitsa etc. Chonde dinani FAQ kuti mukhale ndi mayankho onse omwe muyenera kudziwa.
Dinani FAQsKanema wamtundu wa Qingdao Advanmatch Packaging wopangidwa ndi zigawo zingapo nthawi zambiri amagawidwa kukhalabase layer, magwiridwe antchito ndi zomatira molingana ndi ntchito ya gawo lililonse la filimuyo mosasamala kanthu za kuchuluka kwa zigawo.
Base layer: Nthawi zambiri, zigawo zamkati ndi zakunja za filimu yophatikizika yomwe iyenera kukhala ndi zinthu zabwino zakuthupi komanso zamakina, kuumba ndi kukonza zinthu komanso kusindikiza kwamafuta.Ili ndi ntchito yabwino yosindikiza kutentha komanso kuwotcherera kutentha ndi mtengo wotsika.Pakalipano, imakhalanso ndi chithandizo chabwino komanso chosungirako pazitsulo zogwira ntchito komanso gawo lalikulu kwambiri la membrane wamagulu omwe amatsimikizira kukhwima kwathunthu kwa nembanemba yophatikizika.Zinthu zoyambira ndi PE, PP, EVA, PET ndi PS.
Gawo logwira ntchito:Ma coextrusion functional layer ya filimu yolongedza nthawi zambiri imakhala yotchinga, yomwe nthawi zambiri imakhala pakati pa filimu yamitundu yambiri.Amagwiritsa ntchito kwambiri zotchinga zotchinga monga EVOH, PVDC, PVA, PA, PET, ndi zina zotero. Pakati pawo, zinthu zomwe zimagwiritsidwa ntchito kwambiri ndi EVOH ndi PVDC, ndipo PA ndi PET wamba zimakhala ndi zotchinga zofanana, zomwe zimakhala ndi zipangizo zapakati zotchinga. .
EVOH
Ethylene-vinyl mowa copolymer ndi mtundu wa zinthu polima kuti integability processing wa ethylene polima ndi mpweya chotchinga ethylene mowa polima.Imawonekera kwambiri ndipo ili ndi gloss yabwino.EVOH ili ndi chotchinga chabwino kwambiri polimbana ndi gasi ndi mafuta.Mphamvu zake zamakina, kusinthasintha, kukana kuvala, kukana kuzizira komanso mphamvu yapamtunda ndizabwino kwambiri ndipo ili ndi magwiridwe antchito abwino kwambiri.Cholepheretsa cha EVOH chimadalira zomwe zili mu ethylene.Zogulitsa zodzaza ndi zida za EVOH zimaphatikizapo zokometsera, mkaka, nyama, tchizi, ndi zina.
Zithunzi za PVDC
Polyvinylidene kloride ndi polima wa vinylidene kolorayidi (1,1-dichlorethylene).Kutentha kwa homopolymer polyvinylidene chloride ndikotsika kuposa kusungunuka kwake, kotero kumakhala kovuta kusungunuka.Chifukwa chake, PVDC ngati zinthu zopangira ma CD ndi copolymer ya vinylidene chloride ndi vinyl chloride yomwe ili ndi kulimba kwa mpweya wabwino, kukana dzimbiri, kusindikiza bwino komanso kusindikiza kutentha.Poyamba, ankagwiritsidwa ntchito makamaka popanga zida zankhondo.Koma idayamba kugwiritsidwa ntchito ngati filimu yosunga chakudya m'ma 1950.Makamaka zoyikapo zoziziritsa kuzizira komanso zosunga mwatsopano zomwe zidapangidwa mochulukira ndi kuthamangitsidwa kwaukadaulo wamakono wazolongedza komanso kuthamanga kwa moyo wa anthu amakono, kusintha kwa ophika ma microwave komanso kukulitsa alumali moyo wa chakudya ndi mankhwala zomwe zidapangitsa kugwiritsa ntchito PVDC kutchuka kwambiri.PVDC ikhoza kupangidwa kukhala filimu yopyapyala kwambiri, motero kuchepetsa kuchuluka kwa zida zopangira ndi kuyika ndalama, Ikupitilirabe mpaka pano.
Zomatira wosanjikiza
Chifukwa cha kusalumikizana bwino kwa ma resins oyambira ndi ma resins osanjikiza ogwirira ntchito, ndikofunikira kuyika zigawo zomatira pakati pa zigawo ziwirizi kuti zigwire ntchito ya guluu, kuti apange filimu yophatikiza "yophatikizika".Zomatira zimagwiritsa ntchito utomoni womatira, womwe umagwiritsidwa ntchito kwambiri ndi maleic anhydride omezanitsidwa polyolefin ndi ethylene-vinyl acetate copolymer (EVA).
Mawonekedwe a filimu ya multilayer co-extruded:
1. High chotchinga katundu: Kugwiritsa ntchito multilayer polima m'malo monolayer polymerization akhoza kwambiri kusintha chotchinga katundu wa filimuyo ndi kukwaniritsa mkulu chotchinga zotsatira za mpweya, madzi, mpweya woipa, fungo, etc. Makamaka pamene EVOH ndi PVDC amasankhidwa monga zipangizo zotchinga, mpweya wawo kufala ndi nthunzi kufala madzi mwachionekere otsika kwambiri.
2. Ntchito yolimba: Chifukwa cha kusankha kwakukulu kwa filimu yamitundu yambiri pakugwiritsa ntchito zipangizo, ma resin osiyanasiyana amatha kusankhidwa malinga ndi kugwiritsa ntchito zipangizo zothandiza akuwonetseratu ntchito zamagulu osiyanasiyana, kuti apititse patsogolo ntchito za co. -extrusion filimu, monga kukana mafuta, kukana chinyezi, kutentha kwambiri kuphika kukana, kutsika kwa kutentha kozizira kozizira.Itha kugwiritsidwa ntchito pakuyika vacuum, kulongedza wosabala komanso kuyika kwa inflatable.
3. Mtengo wotsika: Poyerekeza ndi magalasi opangira magalasi, zojambulazo za aluminiyamu ndi mapepala ena apulasitiki amatha kukwaniritsa zolepheretsa zomwezo.Pa nthawi yomweyo, co-extruded filimu ali ndi ubwino waukulu pa mtengo.Mwachitsanzo, kuti akwaniritse chotchinga chofananacho, filimu yokhala ndi zigawo zisanu ndi ziwiri imakhala ndi phindu lalikulu pamtengo wapatali kuposa filimu yamagulu asanu.Chifukwa cha kupanga kwake kosavuta, mtengo wazinthu zamakanema opangidwa ukhoza kuchepetsedwa ndi 10-20% poyerekeza ndi mtengo wa filimu yowuma yowuma ndi mafilimu ena ophatikizika.
4. Mapangidwe osinthika: gwiritsani ntchito mapangidwe osiyanasiyana kuti mukwaniritse zofunikira zotsimikizira zazinthu zosiyanasiyana.
