I-Polyethylene (PE), i-Polypropylene (PP), ne-Polyvinyl Chloride (PVC) yizinto eziyitshe lesisekelo ezimbonini ezingenakubalwa, kusukela emaphaketheni aguquguqukayo neziqukathi eziqinile kuye kumishini yezokwelapha nezingxenye zezimoto. Kodwa-ke, ukusetshenziswa kwabo okusabalele kuhambisana nenselelo eyisisekelo yokucubungula: ukunamathela okungalungile kwendawo. Izinto ezifana ne-PE ne-PP ngokwemvelo azinazo{2}}i-polar futhi zinamandla angaphezulu aphansi, okuzenza zimelane nokuhlangana ngoyinki, ama-coatings, nama-adhesives. Lesi sici siholela ekushiyekeni okuvamile okufana nokungcoliswa kwe-inki, ukuphephuka, namabhondi afaka amandla abuthakathaka, abeka engcupheni ikhwalithi yomkhiqizo, ukuqina, nobuqotho bomkhiqizo. Ukwelashwa kokukhishwa kwe-Corona sekuvele njengesixazululo esisebenza kahle kakhulu, semboni-esijwayelekile sale nkinga esabalele, elungisa amakhemikhali e-polymer ukuze kuvuleke amandla azo aphelele okusebenza.
I-Technical Mechanism Yokwelapha I-Corona
Ukwelashwa kwe-Corona kusebenza ngokukhiqiza i-plasma-yezinga lokushisa eliphansi ku-atmospheric pressure ngokukhipha{1}}ivoltage kagesi ephezulu. Le nqubo yenza umoya we-ambient ibe yi-ioni, idale ukugeleza kwama-electron anamandla, ama-ion, ama-neutral ajabulile, nama-photon aqhuma ipulasitiki. Umphumela oyinhloko ukwethulwa kwamaqembu asebenza endaweni epholile (afana namaqembu e-carbonyl, i-hydroxyl, ne-carboxyl) kumaketanga e-polymer. Lokhu kuguqulwa kwamakhemikhali kukhulisa kakhulu amandla angaphezulu kanye nokumanzisa kwepulasitiki engasebenzi. Indawo ephathwayo isabela kakhulu, inikeze amasayithi asebenzayo kayinki, izinto zokunamathisela, nama-coatings ukuze akhe amabhondi aqinile emishini nawekhemikhali, ngaleyo ndlela kuthuthukisa kakhulu ukusebenza kokunamathela.
Okubalulekile-Ukuzijwayeza kanye Nezinzuzo
Ngenkathi umgomo oyinhloko usebenza kabanzi, ukujwayela ukucutshungulwa kwe-corona kufanele kucabangele izici eziyingqayizivele ze-polymer ngayinye.
I-Polyethylene (PE) ne-Polypropylene (PP): Lawa ma-pololefin ane-hydrophobic kakhulu futhi amele ama-substrates avame kakhulu ekwelapheni i-corona. Ukwelashwa kubalulekile ukuze kuzuzwe ukuphrinta okuhlanzekile, okungcolile{1}}kwamahhala kumafilimi okupakisha kanye nokuqinisekisa ama-seal aqinile, athembekile kuma-multi-ama-layer pouch kanye{3}}nezikhwama zokuma. Ezitsheni ezibunjiwe-ezinjengamabhodlela e-HDPE noma amashubhu e-PP, ukwelashwa kwe-corona ngaphambi kokulebula noma ukuphrinta kwesikrini kubalulekile ukuze kutholwe-izithombe ezinamathelayo,{7}}ezimelana namanzi{7}}ezibekezelela ukuphathwa kanye nokuchayeka kwemvelo.
I-Polyvinyl Chloride (PVC): Nakuba i-PVC ine-polarity ephakeme kakhulu kune-polyolefin, ukwelashwa kwe-corona kusasetshenziswa njalo ukuthuthukisa ukusebenza kwayo. Iqinisekisa ukunamathela okuphezulu kwamapende, ama-coatings, namafilimu anamathelayo asetshenziswa emikhakheni efana neyokwakha (isb., amaphrofayili amafasitela) nezimpawu, ukuthuthukisa ukuqina kanye nekhwalithi yokuqeda.
Ngaphandle kwalokhu, ubuchwepheshe bubalulekile futhi embonini yendwangu ekwelapheni amafayibha okwenziwa afana ne-polyester nenayiloni{0}}izinto ezabelana ngezinselele ezifanayo ze-hydrophobic ne-PP{1}}ukuthuthukisa ukutholwa kukadayi nokunamathela kokunamathela.
Izicelo Ezibalulekile Zezimboni
Ikhono lokushintsha ngokuthembekile izindawo zepulasitiki lenze ukwelashwa kwe-corona kuhlanganiswe nezimboni -zenani eliphezulu ezimbalwa:
1. Ukupakisha: Lena indawo enkulu yohlelo lokusebenza. Isetshenziswa kakhulu emaphaketheni okudla, ezokwelapha, nakwezemithi ukuze kugcinwe ubuqotho bomkhiqizo, kuvinjwe ukugqashuka kukayinki, nokudala izindawo eziyinyumba, ezivalwe ngokuvikelekile. Ithuthukisa ukunamathela kwezingubo zokuvimbela, okubalulekile ekulondolozweni komkhiqizo.
2. Ukulebula Komkhiqizo Nokuhlobisa: Ezimpahleni zabathengi njengemikhiqizo yokunakekelwa komuntu siqu, izihlanzi zasendlini, neziphuzo, ukwelashwa kwe-corona kunika amandla ukuphrinta okuhlala isikhathi eside,{0}}ikhwalithi ephezulu kanye nokulebula ezitsheni ze-PE, PP, ne-PVC, okuthinta ngokuqondile ukukhanga kweshalofu kanye nombono womkhiqizo.
3. Ukuguqula Okukhethekile: Ukucutshungulwa kwamashubhu epulasitiki ezimonyo nemithi kuncike enambeni elincane labahlinzeki abakhethekile. Lapha, abelaphi be-corona bayimishini ebalulekile yokuhlobisa la mashubhu ngempumelelo, edinga ukubambisana okuseduze phakathi kwabahlinzeki bemishini namaprosesa ukuze kuthuthukiswe amasu okukhiqiza.
Izisetshenziswa kanye nokusetshenziswa
Ukwelashwa kwe-corona yezimboni kulethwa imishini esezingeni elisuselwa kuzinhlelo ze-filamentary dielectric barrier discharge (DBD). Imakethe yomhlaba wonke yabahlinzeki bezentengiselwano, okuhlanganisa nezinkampani ezifana ne-Enercon (USA), Ahlbrandt (Germany), Softal (Germany), kanye ne-Vetaphone (Denmark), inikeza laba baphathi. Imishini ingalungiselelwa-ukwelashwa okusohlangothini olulodwa, okuvamile kumafilimu, noma ukucutshungulwa okulandelanayo kwezinhlangothi ezimbili-uma kudingeka. Ukukhethwa kwezinto zokusebenza kuncike ezintweni ze-substrate, ububanzi bewebhu, isivinini sokukhiqiza, kanye nezinga lokwelapha elifiswayo.
Isiphetho kanye ne-Future Outlook
Ukwelashwa kwe-Corona surface kuhlala kuwubuchwepheshe obuvuthiwe, obubizayo{0}obusebenzayo, futhi obubalulekile bokulungisa izinto ze-PE, PP, kanye ne-PVC nezimfuneko ezinzima zokukhiqiza kwesimanje. Ngokuguqula izindawo zepulasitiki ezingasebenzi zibe izinkundla ezamukelekayo zokuhlobisa nokuhlanganisa, kuqinisekisa ukusebenza komkhiqizo, ikhwalithi, nokwethembeka kuyo yonke imisebenzi yokupakisha, yokuphrinta, nokuguqula. Njengoba imboni iqhubeka nokusungula izinto ezintsha ezixubene ne-polymer nezinto ezisimeme, indima ebalulekile yokwelashwa kwe-corona ekwenzeni ukusetshenziswa kwayo okungokoqobo kulindeleke ukuthi iqhubeke futhi iguquke. Intuthuko yesikhathi esizayo ingase igxile ekulawuleni amandla anembe kakhudlwana, ukuhlanganiswa nokuqapha kwekhwalithi esemgqeni, kanye nokulungisa amasistimu ama-polymers asekelwe ku-bio{4}asekelwe ku-bio noma abolayo angena emakethe.