Imigqa yokumboza i-Extrusion ihlala noma iyafa enombolweni eyodwa: amandla ekhasi phakathi kwe-polymer encibilikisiwe ne-substrate. Ukunamathela kokunamathela kwe-Extrusion kunqunywa efasiteleni lamasekhondi ambalwa phakathi kwesiteshi se-treater kanye ne-nip, futhi alikho inani lokushuna komfula elingahlenga iwebhu engene kufasi inamandla angaphezulu angalungile. Lo mhlahlandlela uhlanganisa izilungiselelo zokwelapha, ukuziphatha kwe-substrate kanye nokuguquguquka kwemigqa okuletha ngokuthembekile amabhondi aqinile, aphindaphindwayo ekufakweni kwe-extrusion, i-extrusion lamination kanye nemigqa ye-tandem.
Kungani I-Extrusion Coating Adhesion Iyinkinga Yamandla Angaphezulu
I-polyethylene encibilikisiwe ishiya idayizi cishe ngamadigri angama-300 futhi ifinyelele engonweni phakathi kwesekhondi elilodwa noma amabili. Kulelo windi kufanele imanzise i-substrate ngokuphelele futhi yakhe amabhondi esibili kuyo yonke i-interface. Ukumanzisa kwenzeka kuphela lapho amandla angaphezulu kwe-substrate edlula ukushuba kwendawo kokuncibilika, okuthi ku-LDPE kube cishe ama-dynes angama-31 ngesentimitha futhi kuma-copolymers afana ne-EAA angaba ngaphansi.
Ifilimu ye-polyolefin engaphenduliwe ihlala kuma-dynes angama-29 kuye kwangama-31, khona kanye emngceleni. Kungakho ukunamathela kokunamathela kwe-extrusion kwehluleka esitokweni esingalashiwe futhi kungani ukwelashwa kwe-corona kuyinto evamile kuyo yonke imigqa yokunamathela ye-extrusion. Ukwelashwa kuphakamisa indawo engaphezulu kuye kuma-dynes angama-38 kuye kwangama-42 futhi, okubaluleke kakhulu, kwethula amaqembu asebenza endaweni epholile akha izibopho zamakhemikhali zangempela nokuncibilika, hhayi nje ukuthintana kwe-van der Waals.
Okushiwo okusebenzayo ukuthi awukwazi ukwahlulela ukulungela ngezinga le-dyne kuphela. Indawo efundeka ama-dynes angu-40 ngenxa yokungcoliswa{2}}ukuhwashala okuqhutshwayo iziphatha ngendlela ehlukile kunaleyo efunda ama-dynes angama-40 ngenxa ye-oxidation yangempela. Izinto ezintsha zibalulekile: izindawo ezilashwayo ziyaguga, futhi ukunamathela kokunamathela kwe-extrusion kwehla ngendlela elinganiselwe uma igebe phakathi kokwelashwa ne-nip lidlula imizuzwana embalwa, ikakhulukazi ezinsukwini ezishisayo, ezinomswakama.
Ukusetha Amandla E-Corona Wokunamathela Kwe-Extrusion Coating
Ukuminyana kwe-Watt kuwukuguquguquka okulawulayo, okuvezwa njengama-watts ngesentimitha yesikwele ngomzuzu wendawo elandiwe. Ukuze kuhlanganiswe i-polyolefin efilimini noma ku-foil, ibhendi yokuqala engu-6 ukuya ku-12 W/cm²/min ihlanganisa imigqa eminingi yokukhiqiza.
Ibale ngokuqondile: ukuminyana kwe-watt kulingana namandla asetshenzisiwe ahlukaniswe umkhiqizo wobubanzi bewebhu nesivinini somugqa. Ulayini ongu-1.6 m ububanzi ogijima ku-200 m/min usebenzisa u-20 kW ukhiqiza cishe u-6.3 W/cm²/min. Phinda kabili isivinini ngobubanzi obungaguquki futhi kufanele ube namandla aphindwe kabili ukuze ubambe izinga elifanayo lokwelapha.
Izicupho ezimbili zibamba opharetha ngokuphindaphindiwe. Okokuqala, ukuphakamisa amandla angaphezu kwephuzu lokuncipha kwembuyiselo kushisa indawo, kudala imfucumfucu yesisindo esiphansi-yengqamuzana{2}}futhi empeleni kwenza buthaka ukunamathela kwe-extrusion coating ngokushiya isendlalelo somngcele esibuthakathaka. Okwesibili, ukusebenzisa amandla amancane kakhulu ukonga amandla kukhiqiza indawo ehlola kahle ngokushesha kodwa yehluleke ngemva kokuguga.
Shuna ngokulinganisa amandla ekhasi, hhayi ngokujaha inombolo ye-dyne. Khulisa amandla ngezinyathelo ezingamaphesenti angu-10 kuze kube yilapho ikhasi lamandla licwebile, bese ubuyela esimweni esiphansi esisanikeza umkhawulo onethezekile. Lelo iphoyinti lakho lokusetha lokukhiqiza.
Ukufanisa Ukwelashwa ne-Substrate
Yonke i-substrate iziphatha ngendlela ehlukile, futhi izilungiselelo ezisebenza kwenye zizohluleka kwenye.
Ifilimu ye-LDPE ne-LLDPE.Icala lakudala. Idinga ukwelashwa okugcwele kuma-dynes angama-38 kuye kwangama-42. Buka ukwelashwa okungemuva kumafilimu angaphansi kwama-microns angu-25, okubangela ukuvinjelwa ekuphumuleni.
I-BOPP.I-crystallinity ephakeme isho ukuthi ukwelashwa kuhlala eduze nendawo futhi kuguga kancane kakhulu. Okuhlosiwe kwe-38 kuya ku-40 ama-dynes ngokuvamile anele, kodwa ukunamathela kwe-extrusion coating kuyazwela ezithasiselweni ezishelelayo ezifudukela phezulu futhi ziphazamise ukubopha.
I-PET.Iqala cishe ama-dynes angu-41 ingelashiwe futhi idinga kuphela iphasi elincane ukuze ifinyelele ku-45 ukuya ku-48.{3}}ukwelashwa ngokweqile kuyingozi yangempela lapha ngoba indawo engaphezulu ingaba yimpushana.
I-aluminium foil.I-conductive, ngakho-ke ukukhishwa kuziphatha ngendlela ehlukile futhi isembozo somqulu kufanele siphathe umthwalo oshisayo ophezulu. Izendlalelo ze-oksidi ku-foil zihambisana ngamakhemikhali namaqembu e-polar, yingakho ukunamathela kwe-extrusion ku-foil kuvame ukuhamba phambili uma ukwelashwa sekulungile.
Iphepha nebhodi.I-Porous kanye nomswakama iyazwela. Khomba ama-dynes angama-40 kuye kwangama-44, gcina ukuminyana kwe-watt kumaphakathi, futhi ulawule umswakama, njengoba umhwamuko wamanzi esikhaleni ucindezela ukukhishwa.
Ama-substrates ahlanganiswe futhi afakwe ngensimbi.Lokhu kudinga-impatho emnene, elawulwa kahle ngoba ungqimba olusebenzayo luncane. Umjikelezo wemisebenzi owehlisiwe noma umshini olawulwayo-wokwelapha i-plasma ye-atmosphere ngokuvamile uyimpendulo engcono kune-corona pass esindayo.
Okuguquguqukayo Komugqa Okushintsha Ukunamathela Kwe-Extrusion Coating
Ukwelashwa kuwukufaka okukodwa kuphela. Imigqa eminingana eguquguqukayo ishintsha umphumela futhi kufanele iphathwe ndawonye.
Isikhathi phakathi kokwelashwa kanye ne-nip.Lokhu okuguquguqukayo okulinganiselwe kakhulu. Gcina indlela ibe mfushane ngokusemandleni ngangokunokwenzeka. Njalo ngesekhondi elingeziwe lokuchayeka kubiza amaqembu e-polar njengoba ebuyela kunqwaba.
Izinga lokushisa lewebhu.Ukusebenza kahle kokwelashwa kuba ngcono kuwebhu efudumele, futhi ukunamathela kuyazuza ku-substrate eshisayo ku-nip. Ngokuphambene, ukushisa kwangaphambi kwesikhathi ngokweqile kukhipha amaqembu asanda kwakhiwa.
I-ozone nokukhishwa.I-ozone iwukwelapha-ngomkhiqizo, hhayi umuthi ngokwawo, kodwa futhi iyagqwala. Ukukhipha okwanele kuvikela okokusebenza futhi kugcina umkhathi wegebe ungaguquguquki, okuzinzisa i-extrusion coating adhesion run ukuze isebenze.
Nip pressure futhi uhlale.Ingcindezi ephakeme ishayela ukuncibilika ku-surface micro{{0}porosity futhi ithuthukise ukhiye wokusebenza. Lokhu kugcwalisa isibopho samakhemikhali esivela ekwelashweni kunokusishintsha.
Ukufa nomoya igebe.I-oxidation yokuncibilika esikhaleni somoya kudala amaqembu e-polar ohlangothini lwe-polymer. Igebe elide lomoya linyusa ukuncibilika kwe-oxidation futhi linganxephezela ngokwengxenye ukwelashwa kwe-substrate ebuthakathaka - kodwa futhi kungcuphe ukuntengantenga komkhawulo kanye nentamo{2}}phakathi.
Ukuphola kokuqedwa.I-matte chill roll idlulisa ukuhwaqeka endaweni enamathelayo, engathinti amandla ebhondi kodwa ethinta ukusebenza kokuphrinta okwehlayo nokufakwa kwe-lamination.
| I-substrate | Dyne target | Ukuminyana kwe-Watt (W/cm²/min) | Ingozi eyinhloko |
|---|---|---|---|
| Ifilimu ye-LDPE | 38–42 | 6–10 | Ukwelashwa ngemuva |
| Ifilimu ye-LLDPE | 38–42 | 8–12 | Ukuguga ngaphambi kokulala |
| I-BOPP | 38–40 | 5–8 | Ukufuduka okungezayo kwe-slip |
| I-PET | 45–48 | 3–6 | {0}}Ukwelashwa ngokweqile, ukwenza impushana |
| I-aluminium foil | 42–46 | 6–12 | Roll umthwalo oshisayo |
| Iphepha / ibhodi | 40–44 | 4–8 | Umswakama esikhaleni |
| Ifilimu eyenziwe ngensimbi | 44–50 | 3–5 | Ukulimala kwesendlalelo sensimbi |
Ukulinganisa Nokuqinisekisa Ukunamathela Kokunamathela Kwe-Extrusion
Udinga amasistimu wokulinganisa amabili: eyodwa engaphezulu, enye eyebhondi.
Ngokwangaphandle, amapeni e-dyne noma iziyinki zokuhlola zinikeza ukuhamba ngokushesha-ukuyofunda. Wasebenzise phakathi nendawo nasemiphethweni yomibili, ngokushesha ngemva kokwelashwa futhi futhi ngaphambi nje kwe-nip uma indlela iyinde. Qopha amanani; umkhuba wokukhukhuleka ukutshela ukuthi i-electrode noma i-dielectric idinga ukunakwa.
Ngebhondi, sebenzisa-ukuhlolwa kwepeel kusampula eselashiwe. Ngokushesha ngemva kokumbozwa kwe-extrusion, ukunamathela kusathuthuka, ngakho-ke ukuhlolwa okuthathwe ngokuqondile emugqeni kweqa noma kwehlisa inani lokugcina kuye nge-polymer. Umkhuba ojwayelekile ukubeka amasampula amahora angama-24 ngaphambi kokuhlolwa.
Landela ukuqina kwekhasi ngokumelene nesethi yokwelashwa kulogi elula. Lapho i-extrusion adhesion adhesion drifts, ilogi ikutshela ukuthi ukwelashwa, indawo engaphansi noma isivinini somugqa sishintshile, futhi lokho kunciphisa isikhathi sokuxilongwa ngokuphawulekayo.
Amaphutha Avamile Amosha I-Extrusion Coating Adhesion
- Ukwelapha kude kakhulu nomfula.Umzila ende phakathi komlaphi kanye ne-die uvumela ubuso ukuthi bukhululeke. Sondeza isiteshi eduze noma ukhuphule ukuminyana kwe-watt ukuze unxephezele, kodwa ungamane wamukele ukulahlekelwa.
- Ukwelashwa{0}okungaphezulu.Amandla e-cranking ukuze "aphephe" adala ungqimba olubuthakathaka lomngcele wemfucumfucu ene-oxidised futhi anciphise ukunamathela kokunamathela kwe-extrusion. Okuningi akuncono.
- Ukuhlola kuphela enkabeni yewebhu.Ukunamathela komphetho kwehluleka kuqala futhi kuveza ukugqokwa kwe-electrode noma i-dielectric.
- Ukuziba umswakama.Umswakama ophezulu we-ambient ucindezela ukukhipha futhi wethula amanzi esikhaleni. Ukulungiswa kwamaphoyinti esizini{1}}kujwayelekile ezitshalweni zasezindaweni ezishisayo.
- Ukusebenzisa isembozo esingalungile.I-silicone{{0}roll ekhaviwe egijima nge-watt ephezulu ithuthukisa amathrekhi e-conductive futhi ilethe ukwelashwa okungalingani, ngakho ukunamathela kwe-extrusion coating kuyahlukahluka kubo bonke ububanzi.
- Ukungahloli ireferensi engalashwanga.Ngaso sonke isikhathi gcina isampula yokulawula ye-substrate efanayo ngaphandle kokwelashwa ukuze uqinisekise ukuthi umlaphi empeleni wenza umsebenzi.
FAQ
I-Q1: Iliphi izinga le-dyne engilidingayo ukuze nginamathele okuhle kwe-extrusion coating?
Kuma-substrates e-polyolefin, hlosela ama-dynes angu-38 kuya kwangu-42 ngesentimitha endaweni ye-nip, hhayi lapho uphuma khona. Ku-PET kanye ne-foil, ama-dynes angama-45 ayithagethi enethezekile. Qinisekisa njalo ngokuhlolwa kwekhasi, njengoba izinga le-dyne lingummeleli, hhayi umgomo.
Q2: Ngingathola ukunamathela okuqinile kwe-extrusion coating ngaphandle kokwelashwa kwe-corona?
Ngama-substrates asevele ephethe i-polar chemistry, njengamanye amaphepha amboziwe noma amafilimu{0}enziwe ngaphambilini. Kuma-polyolefin angalungisiwe, izindawo ezingakalungiswa azikwazi ukumanziswa ngokuthembekile ukuncibilika, futhi ukunamathela kuzohluleka ngaphansi kwanoma ikuphi ukucindezeleka komshini noma okushisayo.
Q3: Ingabe ukwelashwa kubola ngokushesha kangakanani ngaphambi kokumbozwa kwe-extrusion?
Ukubola kuncike ezingeni lokushisa, umswakama kanye ne-substrate. Ezimweni ezipholile, ezomile iwebhu ephathwayo ingabamba iningi leleveli yayo ye-dyne izinsuku. Elayini oshisayo, oswakeme we-extrusion ukulahlekelwa amasekhondi ambalwa ohambo kungaba ama-dynes ambalwa, ngakho-ke gcina indlela elashiwe imfushane.
I-Q4: Ingabe isivinini somugqa ophezulu silimaza ukunamathela kokunamathela kwe-extrusion?
Hhayi uma ukuminyana kwe-watt kubanjwe njalo. Isivinini sinciphisa isikhathi sokuhlala ekukhishweni, ngakho-ke kufanele ukhulise amandla ngokulinganayo. Lapho umlaphi ekusilingi samandla akhe, isivinini siba yisibopho esibophayo futhi kufanele wehlise ijubane noma wamukele ukwelashwa okuphansi.
I-Q5: Kungani ukunamathela kwe-extrusion coating kuhluka kusuka kumqulu kuya ku-roll?
Izimbangela ezivamile ukuhlukahluka kwe-substrate lot, izinguquko ekulayishweni{0}}ekuvimbeni noma ekusheleleni okungeziwe, ukukhukhuleka esikhaleni se-electrode, ukuguga kwe-dielectric, kanye nomswakamo we-ambient. Imiphumela yekhasi lelogi ngokumelene nenombolo yelotho ye-substrate ukuze uhlukanise umthombo.
I-Q6: Ingabe i-ozone iyingozi ekunamatheleni kwe-extrusion coating?
I-ozone ngokwayo ayilimazi esibophweni, kodwa i-ozone engalawuleki ibonisa ukukhishwa okungaguquki, okushintsha umkhathi wegebe ngakho-ke ukukhishwa. I-ozone ephezulu iphinde idle izingxenye zensimbi eziseduze kanye nesembozo serabha seminyaka.
Q7: Ingabe kufanele ngiphathe izinhlangothi zombili ze-substrate?
Phatha uhlangothi oluthola ukunamathela. Ukwelapha izinhlangothi zombili kusetshenziswa ngezikhathi ezithile ukulawula ukugoqa noma ukulungisa ubuso obuhlanekezela inqubo elandelayo, kodwa kuphinda kabili umthwalo oshisayo futhi kwandise ingozi yokuvinjwa lapho ukhulula.
Isiphetho
I-Extrusion coating adhesion ingumphumela wenqubo, hhayi impahla ephathekayo, futhi izilungiselelo zokwelapha ziyi-lever enkulu kunazo zonke oyilawulayo. Setha ukuminyana kwe-watt kusuka ku-substrate nesivinini somugqa, qinisekisa ngokuhlolwa kwekhasi kumasampuli anesimo, gcina indlela eselashiwe imfushane, nemiphumela yelogi ukuze ukukhukhuleka kubonakale kusenesikhathi.
I-Shenzhen Hefeng Jiada Technology ihlinzeka ngemithi ye-corona, imishini yokwelapha i-plasma kanye nemishini yokuxhumana yokuhlanza iwebhu eyakhelwe ukumboza izintambo kanye nemigqa yokulambisa. Yabelana nge-substrate yakho, ububanzi bomugqa, isivinini namandla ekhasi eliqondiwe, futhi onjiniyela bethu bazosayizi wesiteshi sokwelapha futhi bancome izilungiselelo ezibamba ukunamathela kokunamathela kwe-extrusion ngemva kokugijima.