Kuyo yonke inkqubo yemveliso yanamhlanje PCB, i-inki iye yaba yenye yezinto ezincedisayo eziyimfuneko kwinkqubo yokwenziwa kwePCB yeefektri zePCB. Ikwindawo ebaluleke kakhulu kwizinto zenkqubo yePCB. Ukuphumelela okanye ukungaphumeleli kokusetyenziswa kwe-inki kuchaphazela ngokuthe ngqo iimfuno zobugcisa kunye nezikhombisi zomgangatho wokuthunyelwa kwe-PCB. Ngesi sizathu, abavelisi bePCB bancamathisela ukubaluleka okukhulu ekusebenzeni kwee-inki. Ukongeza kwi-viscosity ye-inki eyaziwayo, i-thixotropy njenge-inki ihlala ingahoywa ngabantu. Kodwa idlala indima ebaluleke kakhulu kwisiphumo soshicilelo lwesikrini.

Ngezantsi sihlalutya kwaye siphonononge impembelelo ye-thixotropy kwinkqubo ye-PCB ekusebenzeni kwe-inki:

1. Isikrini

Isikrini sesilika sesinye sezixhobo eziyimfuneko kwinkqubo yoshicilelo lwesikrini. Ngaphandle kwesikrini, ayinakubizwa ngokuba lushicilelo lwesikrini. Ukuprintwa kwesikrini ngumphefumlo wetekhnoloji yoshicilelo lwesikrini. Izikrini ziphantse zonke iilaphu zesilika (ngokuqinisekileyo kukwakho amalaphu angeyosilika).

Kwishishini le-PCB, eyona isetyenziswa kakhulu yi-t-type net. s kunye nohlobo lwe-hd networks azisetyenziswa ngokubanzi ngaphandle kweemfuno ezizodwa ezizodwa.

2. I-Inki

Ibhekisa kwinto enemibala yegelatinous esetyenziselwa iibhodi eziprintiweyo. Ihlala iqulunqwe ngee-resin zokwenziwa, i-solvents eguquguqukayo, i-oyile kunye ne-fillers, i-desiccants, i-pigments kunye ne-diluents. Idla ngokubizwa ngokuba yi-inki.

Ntathu. Iimpawu ezininzi ezibalulekileyo zobugcisa be-inki ye-PCB

Nokuba umgangatho we-inki ye-PCB ugqwesileyo, ngokomgaqo, akunakwenzeka ukuba uhlukane nokudityaniswa kwezi zixhobo zingentla. Umgangatho obalaseleyo we-inki yimbonakaliso ebanzi yenzululwazi, ukuqhubela phambili kunye nokukhuselwa kokusingqongileyo kwifomula. Ibonakaliswa kwi:

(1) I-Viscosity: imfutshane kwi-viscosity eguqukayo. Ngokuqhelekileyo ibonakaliswa yi-viscosity, oko kukuthi, uxinzelelo lwe-shear lokuhamba kwamanzi olwahlulwe yi-gradient yesantya kwicala le-flow layer, iyunithi yamazwe ngamazwe yi-Pa/sec (pa.s) okanye i-milliPascal/sec (mpa.s). Kwimveliso PCB, ibhekisela fluidity inki eveliswa ngamandla angaphandle.

(2) I-Plastiki: Emva kokuba inki ikhubaziwe ngamandla angaphandle, isagcina iimpawu zayo ngaphambi kokuguqulwa. Iplastiki ye-inki inceda ekuphuculeni ukuchaneka kokushicilela;

(3) Thixotropic: (thixotropic) I-inki ijikajika xa ishiywe imile; Kwakhona kuthiwa yi-thixotropic kunye ne-sag resistance;

(4) Ulwelo: (inqanaba) ubungakanani be-inki esasazeka phantsi kwesenzo samandla angaphandle. I-Fluidity yi-reciprocal of viscosity, kwaye i-fluidity inxulumene neplastiki kunye ne-thixotropy ye-inki. Iplastiki kunye ne-thixotropy inkulu, i-fluidity inkulu; i-fluidity inkulu, i-imprint kulula ukwandisa. Nge-fluidity ephantsi, ijwayele ukubunjwa kwenethiwekhi, okubangela ukubunjwa kwe-inki, eyaziwa ngokuba yi-reticulation;

5 Kuyimfuneko ukuba isantya inki deformation ikhawuleza kwaye inki rebounds ngokukhawuleza ukuba luncedo kushicilelo;

(6) Ukomisa: ukucotha ukomiswa kwe-inki kwisikrini, kungcono, kwaye ngokukhawuleza kungcono emva kokuba i-inki idluliselwe kwi-substrate;

(7) Ukulunga: ubungakanani bebala kunye namasuntswana ezinto eziqinileyo, i-inki yePCB ingaphantsi kwe-10μm, kwaye ubungakanani bokulunga kufuneka bube ngaphantsi kwesinye kwisithathu sokuvulwa komnatha;

8 Intambo ye-inki inde, kwaye kukho imicu emininzi kumphezulu we-inki kunye nomphezulu wokushicilela, okwenza i-substrate kunye nepleyiti yokushicilela ibe mdaka, okanye ingakwazi ukuprinta;

9 Ngokubanzi, ii-inks zesekethe, ii-inks zokuqhuba kunye nee-inki zabalinganiswa zonke zifuna amandla aphezulu okufihla. Ukumelana ne-solder kuguquguquka ngakumbi.

(10) Ukumelana nemichiza ye-inki: I-PCB inkino inemigangatho engqongqo ye-asidi, i-alkali, ityuwa kunye ne-solvent ngokweenjongo ezahlukeneyo;

(11) Ukuxhathisa ngokomzimba kwe-inki: I-inki ye-PCB kufuneka ihlangabezane nenkcaso yangaphandle yokukrala, ukuxhathisa ukothuka kwe-thermal, ukuxhathisa kumatshini we-peel, kwaye ihlangabezane neemfuno ezahlukeneyo ezingqongqo zokusebenza kombane;

(12) Ukhuseleko kunye nokukhuselwa kokusingqongileyo kwe-inki: I-inki ye-PCB ifuneka ukuba ibe netyhefu ephantsi, ingenavumba, ikhuseleke kwaye ikhuseleke ngokusingqongileyo.

Ngaphezulu sishwankathele iipropathi ezisisiseko zee-inki zePCB ezilishumi elinambini. Phakathi kwabo, ekusebenzeni kwangempela kokuprintwa kwesikrini, ingxaki ye-viscosity ihambelana ngokusondeleyo nomsebenzisi. I-viscosity ibaluleke kakhulu ekugudimeni kwesikrini sesilika. Ngoko ke, kwi-PCB iimpepha zobugcisa be-inki kunye neengxelo ze-qc, i-viscosity iphawulwe ngokucacileyo, ebonisa phantsi kweziphi iimeko kunye noluphi uhlobo lwesixhobo sokuvavanya i-viscosity. Kweyona nkqubo yoshicilelo, ukuba i-viscosity ye-inki iphezulu kakhulu, kuya kuba nzima ukuyiprinta, kwaye imiphetho yemizobo iya kuba nzima kakhulu. Ukuze kuphuculwe umphumo wokushicilela, i-thinner iya kongezwa ukwenza i-viscosity ihlangabezane neemfuno. Kodwa akunzima ukufumanisa ukuba kwiimeko ezininzi, ukuze ufumane isisombululo esifanelekileyo (isisombululo), kungakhathaliseki ukuba yiyiphi i-viscosity oyisebenzisayo, kusenzima ukufezekisa. Ngoba? Emva kophando olunzulu, ndafumanisa ukuba i-inki viscosity yinto ebalulekileyo, kodwa kungekhona yodwa. Kukho enye into ebaluleke kakhulu: thixotropy. Ikwachaphazela ukuchaneka koshicilelo.

Isine. Thixotropy

I-Viscosity kunye ne-thixotropy zizinto ezimbini ezahlukeneyo zomzimba. Inokuqondwa ukuba i-thixotropy luphawu lotshintsho kwi-inki viscosity.

Xa i-inki ikwiqondo lobushushu elithile elingaguqukiyo, becinga ukuba isinyibilikisi kwiinki asiphumi ngokukhawuleza, i-viscosity ye-inki ayiyi kutshintsha ngeli xesha. I-viscosity ayinanto yakwenza nexesha. I-viscosity ayikho into eguquguqukayo, kodwa ihlala rhoqo.

Xa inki iphantsi kwamandla angaphandle (ukuvuselela), i-viscosity iyatshintsha. Njengoko amandla aqhubeka, i-viscosity iya kuqhubeka iyancipha, kodwa ayiyi kuhla ngokungapheliyo, kwaye imise xa ifikelela kumda othile. Xa amandla angaphandle anyamalala, emva kwexesha elithile lokuma, i-inki inokuthi ngokuthe ngcembe ibuyele kwimeko yokuqala. Sibiza olu hlobo lwepropathi ebonakalayo eguqulwayo ukuba i-ink viscosity iyancipha kunye nokwandiswa kwexesha phantsi kwesenzo samandla angaphandle, kodwa emva kokuba amandla angaphandle anyamalale, angabuyela kwi-viscosity yasekuqaleni njenge-thixotropy. Thixotropy yinguqu ehambelana nexesha phantsi kwesenzo samandla angaphandle.

Ngaphantsi kwesenzo samandla angaphandle, ubude obufutshane bamandla, kunye nokuncipha okucacileyo kwe-viscosity, sibiza le inki i-thixotropy inkulu; ngokuchaseneyo, ukuba ukuhla kwe-viscosity akubonakali, kuthiwa i-thixotropy incinci.

5. Indlela yokusabela kunye nokulawula inki thixotropy

Yintoni kanye kanye i-thixotropy? Kutheni i-viscosity ye-inki iyancipha phantsi kwesenzo samandla angaphandle, kodwa amandla angaphandle ayanyamalala, emva kwexesha elithile, i-viscosity yasekuqaleni inokubuyiselwa?

Ukugqiba ukuba i-inki ineemeko eziyimfuneko ze-thixotropy, okokuqala i-resin ene-viscosity, kwaye izaliswe ngumlinganiselo othile womthamo we-filler kunye ne-pigment particles. Emva kokuba i-resin, i-fillers, i-pigments, i-additives, njl.njl iphantsi kwaye icutshungulwe, ixutywe kakhulu ngokufanayo. Bangumxube. Ukungabikho kokushisa kwangaphandle okanye amandla okukhanya kwe-ultraviolet, zikhona njengeqela le-ion elingaqhelekanga. Ngaphantsi kweemeko eziqhelekileyo, zicwangciswe ngendlela elungeleleneyo ngenxa yokutsalana, kubonisa isimo se-viscosity ephezulu, kodwa akukho mpendulo yekhemikhali eyenzekayo. Kwaye emva kokuba iphantsi kwamandla omatshini angaphandle, ulungelelwaniso olucwangcisiweyo lwangaphambili luphazamiseka, ikhonkco lokutsalelana linqunyulwa, kwaye liba yimeko ephazamisayo, ebonisa ukuba i-viscosity iba ngaphantsi. Le yinto esidla ngokuyibona i-inki ukusuka kwingqimba ukuya kwi-thick. Singasebenzisa le dayagram ilandelayo evaliweyo yenkqubo yokubuyisela umva i-loop ukubonisa ngokucacileyo yonke inkqubo ye-thixotropy.

Akunzima ukufumanisa ukuba ubungakanani bezinto eziqinileyo kwi-inki kunye nemilo kunye nobukhulu bezinto eziqinileyo ziya kugqiba iimpawu ze-thixotropic ze-inki. Ewe kunjalo, akukho thixotropy yolwelo oluphantsi kakhulu kwi-viscosity. Nangona kunjalo, ukwenzela ukuba ibe yinki ye-thixotropic, kunokwenzeka ngokobuchule ukongeza i-agent encedisayo yokutshintsha kunye nokwandisa i-viscosity ye-inki, ukuyenza ibe thixotropic. Esi songezo sibizwa ngokuba yi-agent ye-thixotropic. Ngoko ke, i-thixotropy ye-inki iyalawuleka.

Ntandathu. Ukusetyenziswa okusebenzayo kwe-thixotropy

Kwizicelo ezisebenzayo, ayikukuba inkulu ithixotropy, ingcono, okanye encinci ingcono. Kwanele nje. Ngenxa yeempawu zayo ze-thixotropic, inki ifanelekile kakhulu kwinkqubo yoshicilelo lwesikrini. Yenza umsebenzi woshicilelo lwesikrini ube lula kwaye usimahla. Ngexesha lokuprintwa kwesikrini se-inki, i-inki kumnatha ityhalwa yi-squeegee, ukuqengqeleka kunye nokucofa kwenzeka, kwaye i-viscosity ye-inki iba ngaphantsi, ehambelana nokungena kwe-inki. Emva kokuba i-inki ishicilelwe kwikhusi kwi-substrate ye-PCB, ngenxa yokuba i-viscosity ayinakufunyanwa ngokukhawuleza, kukho indawo efanelekileyo yokulinganisa ukwenza i-inki ihambe ngokucothayo, kwaye xa ibhalansi ibuyiselwe, imiphetho yeskrini eprintiweyo yemizobo iya kufumana eyanelisayo. ukuba tyaba.