Isizathu esiyinhloko esenza i-PVC ibe nalezi zinzuzo ezimbili yinqubo yayo yokukhiqiza.Inqubo yokukhiqiza izikhwama ze-PVC ayiyona inkimbinkimbi.Ulayini ojwayelekile wokukhiqiza ngokuvamile wakhiwa umshini wokunyathelisa we-roller, umshini wokunyathelisa, umshini wokugcoba emuva kanye nomshini wokusika.Ifilimu encane idliwe ndawonye futhi iphethini iphrintiwe ohlangothini lwangaphambili lwefilimu ngomshini wokunyathelisa, futhi ungqimba lwe-back coating luhlanganiswe nokungafani kwefilimu nge-back coater.
Lolu ngqimba lwe-back coating lubonakala luyisinyathelo esincane kakhulu, kodwa lubaluleke kakhulu futhi lubalulekile.Kuyisiqinisekiso esibalulekile somsebenzi wesikhwama se-PVC.
I-back coating yakhiwe ngezinto ezikhethekile futhi iwuhlobo lwe-agent ehambisana namandla aphezulu.Kungenxa yalesi sigqoko sangemuva ukuthi ifilimu ye-PVC ingahlanganiswa ngokuqinile ne-MDF noma amanye amabhodi, futhi inekhono lokugcizelela ukungavuli isikhathi eside.Inkinga ngemaski evamile ukuthi ayikwazi ukubhekana nenkinga yokubuna kwefilimu.
Isikhwama sokupakisha se-PVC senziwe ngezinto ze-PVC eziyisithwathwa, ezinhle futhi ezihlala isikhathi eside, kulula ukuzisebenzisa, zithambile lapho uzithinta, futhi ezithengekayo.Yenziwe nge-PVC esobala ephezulu, izinto ezikhethekile zokulwa ne-static, isikhwama asinamatheli, kulula ukuyisebenzisa, umsebenzi omuhle, awekho amakhona Ama-burrs awalimazi izandla zakho, uziphu usetshenziswa kahle futhi unokuphila ende, futhi ukubekwa uphawu kucindezelwe ngokuqinile futhi akunqamuki kalula.Kuwukhetho lwamaphakheji okukhangisa azo zonke izinhlobo zezingubo zangaphansi, amasokisi, imibhalo, izimonyo, izimpahla zasendlini, izindwangu zasekhaya nokunye.
Izinga lokudla lihlanganisa umbala, ukunambitheka, inani lokudla okunempilo, ukwakheka, isisindo, kanye nezinkomba zenhlanzeko zokudla.Cishe konke ukudla okugayiwe kudinga ukupakishwa ngaphambi kokuthi kudayiswe njengempahla.Nakuba ukudla kuyimpahla izinga layo elisengozini yokuwohloka kakhulu ngenxa yezimo zemvelo, ukudla ngakunye okupakishiwe kufanele kuhlangabezane nenkomba yekhwalithi ehambisanayo yezikhwama zokupakisha ukudla phakathi nesikhathi seshelufu esimisiwe.
Sonke isixhumanisi sokujikeleza kokudla kusuka ekucutshungulweni kwempahla eluhlaza kuya ekusetshenzisweni siyinkimbinkimbi futhi siyashintsha.Izothinteka ekuthelelekeni kwezinto eziphilayo namakhemikhali, kanye nezici ezihlukahlukene zendawo ezungezile njengokukhanya, umoya-mpilo, umswakama, izinga lokushisa, nama-microorganisms avela phakathi nenqubo yokukhiqiza nokujikeleza.Umthelela.
Umthelela wokukhanya kwikhwalithi yokudla
(1) Ukonakala kokukhanya ekudleni
Ukukhanya kunethonya elikhulu izinga lokudla.Kungabangela futhi kusheshise ukubola kwezakhi ekudleni, futhi ukusabela kokubola kokudla kwenzeka.Ibonakaliswa ngokuyinhloko ezicini ezine: ukukhuthaza ukusabela kwe-oxidation yamafutha ekudleni futhi kubangele i-oxidative rancidity;yenza ukudla Imibala emkhiqizweni ishintshashintsha amakhemikhali futhi ishintshe umbala;yenza ukudla okuluhlaza, okuphuzi, okubomvu ekudleni kwezitshalo nokubomvu ekudleni kwenyama okumnyama noma okunsundu;kubangela ukubhujiswa kwamavithamini angezwani nokukhanya njengamavithamini B namavithamini, futhi ahlanganiswe nezinye izinto Izinguquko zamakhemikhali ezingathandeki zenzeka;kubangela denaturation amaprotheni nama-amino acids ekudleni.
(2) Umthetho wokungena kokukhanya ekudleni
Ukukhanya kungakhuthaza ingaphakathi lokudla-uchungechunge lwezinguquko lubangelwa amandla ako aphezulu.Ngaphansi kokukhanya, izingxenye ezizwela ukukhanya ekudleni zingamunca ngokushesha futhi ziguqule amandla okukhanya, ngaleyo ndlela zishukumise ukusabela kwamakhemikhali okwenzeka ngaphakathi kokudla.Lapho ukudla kudonsa kakhulu amandla okukhanya nokujula kokudlulisa, ukudla kuzowohloka ngokushesha nakakhudlwana.Inani lamandla okukhanya amuncwa ukudla livezwa ukuminyana kwe-optical.Ukuphakama kwe-optical density, amandla okukhanya aba makhulu, futhi kuba namandla umphumela wokuwohloka kokudla.
Isikhathi sokuthumela: Aug-04-2021