1. Intshayelelo
Ukususela oko kwavela iidayi ezivuselelayo, i-sodium alginate (SA) ibisoloko iyinto ephambili yokuprinta idayi evuselelayo kwimpahla yomqhaphu.
Ukusebenzisa iintlobo ezintathu zeii-ether ze-celluloseI-CMC, i-HEC kunye ne-HECMC ezilungiselelwe kwiSahluko sesi-3 njengentlama yokuqala, zisetyenziswe ekuprintweni kwedayi esebenzayo ngokwahlukeneyo.
Iipropati ezisisiseko kunye neempawu zokuprinta zezi ntlama zintathu zivavanyiwe zaza zathelekiswa neSA, kwaye iifayibha ezintathu zavavanywa.
Iimpawu zokuprinta ze-vitamin ethers.
2 Inxalenye yovavanyo
Izixhobo zovavanyo kunye namayeza
Izinto ezisetyenzisiweyo kunye namayeza asetyenzisiweyo kolu vavanyo. Phakathi kwazo, amalaphu okuprinta idayi esebenzayo ebekukucocwa nokulungiswa, njl.
Uthotho lwemisonto ecocekileyo yekotoni elungisiweyo kwangaphambili, uxinano 60/10cm×50/10cm, imisonto eluka 21tex×21tex.
Ukulungiswa kwepeyinti yokuprinta kunye nepeyinti yombala
Ukulungiswa kwentlama yokuprinta
Kwiipaste ezine zokuqala ze-SA, CMC, HEC kunye ne-HECMC, ngokomlinganiselo womxholo oqinileyo owahlukeneyo, phantsi kweemeko zokuxukuxa
Emva koko, yongeza intlama kancinci emanzini, qhubeka uyixuba kangangexesha elithile, ide intlama yokuqala ifane kwaye ibonakale, yeka ukuyixuba, uze uyibeke esitovini.
Kwiglasi, yima ubusuku bonke.
Ukulungiswa kwentlama yokuprinta
Okokuqala nyibilikisa i-urea kunye netyuwa echasene nokudaya i-S ngamanzi amancinci, uze wongeze iidayi ezisabelayo ezinyibilikiswe emanzini, ufudumale uze udibanise nebhafu yamanzi afudumeleyo.
Emva kokuxubha ixesha elithile, yongeza idayi ecociweyo kwintlama yokuqala uze uxube ngokulinganayo. Yongeza inyibilike ude uqale ukuprinta
I-sodium bicarbonate elungileyo. Ifomyula yepeyinti yombala yile: idayi ephendulayo 3%, ipeyinti yokuqala 80% (umxholo oqinileyo 3%), i-sodium bicarbonate 3%,
Ityuwa elwa nongcoliseko S yi-2%, i-urea yi-5%, kwaye ekugqibeleni amanzi ongezwa kwi-100%.
inkqubo yokuprinta
Inkqubo yokuprinta idayi esebenzayo kwilaphu lekotoni: ukulungiswa kwentlama yokuprinta → ukuprinta i-magnetic bar (kubushushu begumbi kunye noxinzelelo, ukuprinta amaxesha ama-3) → ukomisa (105℃, 10min) → ukufutha (105±2℃, 10min) → ukuhlamba ngamanzi abandayo → Ukuhlamba ngamanzi ashushu (80℃) → ukubila ngesepha (iiflakes zesepha 3g/L,
100℃, 10min) → ukuhlamba ngamanzi ashushu (80℃) → ukuhlamba ngamanzi abandayo → ukomisa (60℃).
Uvavanyo olusisiseko lokusebenza kwepaste yokuqala
Uvavanyo lwezinga lokuncamathisela
Kwalungiselelwa iipaste ezine zokuqala ze-SA, CMC, HEC kunye ne-HECMC ezinemixholo eyahlukeneyo eqinileyo, kwaye iBrookfield DV-Ⅱ
Ubungakanani bentlama nganye enomxholo oqinileyo owahlukileyo buvavanywe nge-viscometer, kwaye ijika lotshintsho lwentlama kunye noxinzelelo yayilizinga lokwakheka kwentlama yentlama.
igophe.
I-Rheology kunye nePrinting Viscosity Index
I-Rheology: I-Rheometer ejikelezayo ye-MCR301 isetyenzisiwe ukulinganisa i-viscosity (η) ye-paste yokuqala ngamanani ahlukeneyo okucheba.
Ijika lotshintsho lwesantya sokucheba yijika le-rheological.
Isalathisi se-viscosity yokuprinta: Isalathisi se-viscosity yokuprinta sichazwa yi-PVI, i-PVI = η60/η6, apho i-η60 kunye ne-η6 ngokulandelelanayo
Ubungakanani bentlama yokuqala elinganiswe yiBrookfield DV-II viscometer ngesantya esifanayo se-rotor se-60r/min kunye ne-6r/min.
uvavanyo lokugcina amanzi
Bulala i-25g yentlama yokuqala kwi-beaker ye-80mL, uze wongeze kancinci i-25mL yamanzi acociweyo ngelixa uxuba ukwenza umxube.
Ixutywe ngokulinganayo. Thatha iphepha lesihluzo elinobude obuyi-10cm × 1cm, uze uphawule umgca wesikali kwelinye icala lephepha lesihluzo, uze ufake isiphelo esiphawulweyo kwintlama, ukuze umgca wesikali uhambelane nomphezulu wentlama, kwaye ixesha liqalwe emva kokuba iphepha lesihluzo lifakiwe, kwaye lirekhodwe kwiphepha lesihluzo emva kwemizuzu engama-30.
Ukuphakama apho umswakama unyuka khona.
Uvavanyo lwe-4 lokuhambelana kweekhemikhali
Ukuze uprinte idayi esebenzayo, vavanya ukuba ipeyinti yokuqala iyahambelana na nezinye iidayi ezongeziweyo kwipeyinti yokuprinta,
Oko kukuthi, ukuhambelana phakathi kwentlama yokuqala kunye nezinto ezintathu (i-urea, i-sodium bicarbonate kunye netyuwa echasene nokudaya i-S), amanyathelo athile ovavanyo ngala alandelayo:
(1) Ukuvavanya i-viscosity ebhekisele kwi-paste yokuqala, yongeza i-25mL yamanzi acociweyo kwi-50g ye-paste yokuqala yokuprinta, uxube ngokulinganayo, uze ulinganise i-viscosity.
Ixabiso le-viscosity elifunyenweyo lisetyenziswa njenge-viscosity ebhekisayo.
(2) Ukuvavanya i-viscosity ye-paste yokuqala emva kokongeza izithako ezahlukeneyo (i-urea, i-sodium bicarbonate kunye netyuwa echasene nokudaya i-S), beka i-15% elungisiweyo.
Isisombululo se-Urea (inxalenye yobunzima), isisombululo se-S setyuwa esichasene nokudaya i-3% (inxalenye yobunzima) kunye nesisombululo se-sodium bicarbonate se-6% (inxalenye yobunzima)
I-25mL yongezwa kwi-50g yentlama yokuqala ngokulandelelana, yaxutywa ngokulinganayo yaza yabekwa ixesha elithile, yaza yalinganiswa i-viscosity yentlama yokuqala. Ekugqibeleni, i-viscosity iya kulinganiswa
Amaxabiso e-viscosity athelekiswa ne-viscosity ehambelanayo, kwaye ipesenti yotshintsho lwe-viscosity ye-paste yokuqala ngaphambi nasemva kokongeza idayi nganye kunye nezinto zeekhemikhali ibalwe.
Uvavanyo Lozinzo Lokugcina
Gcina intlama yokuqala kubushushu begumbi (25°C) phantsi koxinzelelo oluqhelekileyo kangangeentsuku ezintandathu, ulinganise intlama yokuqala yonke imihla phantsi kweemeko ezifanayo, uze ubale intlama yokuqala emva kweentsuku ezi-6 xa kuthelekiswa nentlama elinganiswe ngosuku lokuqala ngefomula 4-(1). Inqanaba lokusasazeka kwentlama nganye yokuqala livavanywa ngenqanaba lokusasazeka njengesalathisi.
Uzinzo lokugcina, kokukhona ukusasazeka kuncinci, kokukhona uzinzo lokugcina lwentlama yokuqala lungcono.
Uvavanyo lwezinga lokutyibilika
Okokuqala yomisa ilaphu lekotoni ukuze liprintwe libe nobunzima obungaguqukiyo, ulilinganise kwaye ulibhale phantsi njenge-mA; emva koko yomisa ilaphu lekotoni emva kokuliprinta libe nobunzima obungaguqukiyo, ulilinganise kwaye ulibhale phantsi
yi-mB; ekugqibeleni, ilaphu lekotoni eliprintiweyo emva kokulifutha, ukulihlamba kunye nokulihlamba lomiswa libe nobunzima obungaguqukiyo, lilinganiswe kwaye lirekhodwe njenge-mC
Uvavanyo lwesandla
Okokuqala, amalaphu ekotoni ngaphambi nasemva kokuprintwa ayathathwa iisampulu njengoko kufuneka, emva koko isixhobo sefabric style se-phabrometer sisetyenziselwa ukulinganisa ubukhali bamalaphu.
Imvakalelo yesandla yelaphu ngaphambi nasemva kokuprinta ihlolwe ngokupheleleyo ngokuthelekisa iimpawu ezintathu zemvakalelo yesandla eziquka ukuthamba, ukuqina kunye nokuthamba.
Uvavanyo lokukhawuleza kombala kwilaphu eliprintiweyo
(1) Uvavanyo lokukhawuleza kombala ukuya ekuhlikihleni
Vavanya ngokuhambelana ne-GB/T 3920-2008 “Ukukhawuleza kombala ukuya ekuhlikihleni ukuze kuvavanywe ukukhawuleza kombala kwimpahla”.
(2) Uvavanyo lokukhawuleza kombala ukuya ekuhlanjweni
Uvavanyo ngokwe-GB/T 3921.3-2008 “Uvavanyo lokukhawuleza kombala ukuya ekufakeni isepha kwimpahla yelaphu”.
Umxholo oqinileyo wokuqala wepaste/%
I-CMC
I-HEC
I-HEMCC
SA
Utshintsho lwe-viscosity yeentlobo ezine zeepasta zokuqala ezinomxholo oqinileyo
yi-sodium alginate (SA), i-carboxymethyl cellulose (CMC), i-hydroxyethyl cellulose (HEC) kunye
Ii-viscosity curves zeentlobo ezine zee-original pastes ze-hydroxyethyl carboxymethyl cellulose (HECMC) njengomsebenzi womxholo oqinileyo.
, uburhabaxa beentlama ezine zokuqala banda ngokwanda komxholo oqinileyo, kodwa iipropati zokwenza intlama zeentlama ezine zokuqala zazingafani, phakathi kwazo i-SA
Ipropati yokuncamathisela ye-CMC kunye ne-HECMC yeyona ilungileyo, kwaye ipropati yokuncamathisela ye-HEC yeyona imbi kakhulu.
Ii-rheological performance curves zee-paste ezine zokuqala zilinganiswe nge-MCR301 rotational rheometer.
- Ijika le-viscosity njengomsebenzi wesantya sokucheba. Ukuqina kweentlama ezine zokuqala konke kwanda ngesantya sokucheba.
ukwanda nokuncipha, i-SA, i-CMC, i-HEC kunye ne-HECMC zonke zii-pseudoplastic fluids. Itheyibhile 4.3 Amaxabiso e-PVI ee-pastes ezahlukeneyo eziluhlaza
Uhlobo lwentlama eluhlaza SA CMC HEC HECMC
Ixabiso le-PVI 0.813 0.526 0.621 0.726
Kuyabonakala kwiTheyibhile 4.3 ukuba isalathisi se-viscosity yokuprinta se-SA kunye ne-HECMC sikhulu kwaye i-viscosity yolwakhiwo incinci, oko kukuthi, i-paste yokuqala yokuprinta
Phantsi kwesenzo samandla aphantsi okucheba, izinga lokutshintsha kwe-viscosity lincinci, kwaye kunzima ukuhlangabezana neemfuno zesikrini esijikelezayo kunye nokuprinta kwesikrini esisicaba; ngelixa i-HEC kunye ne-CMC
Isalathisi se-viscosity yokuprinta ye-CMC yi-0.526 kuphela, kwaye i-viscosity yayo yesakhiwo inkulu kakhulu, oko kukuthi, i-paste yokuprinta yokuqala inamandla aphantsi okucheba.
Phantsi kwesenzo, izinga lokutshintsha kwe-viscosity liphakathi, elinokuhlangabezana ngcono neemfuno zesikrini esijikelezayo kunye nokuprintwa kwesikrini esisicaba, kwaye linokufaneleka ukuprintwa kwesikrini esijikelezayo ngenani le-mesh ephezulu.
Kulula ukufumana iipateni ezicacileyo kunye nemigca.
Ii-Rheological curves ze-1% ye-solids ezine eziluhlaza
Uhlobo lwentlama eluhlaza SA CMC HEC HECMC
h/cm 0.33 0.36 0.41 0.39
Iziphumo zovavanyo lokubamba amanzi ze-1%SA, 1%CMC, 1%HEC kunye ne-1%HECMC intlama yokuqala.
Kufunyaniswe ukuba amandla okugcina amanzi e-SA ngawona angcono, kulandele i-CMC, kwaye okubi ngakumbi yi-HECMC kunye ne-HEC.
Uthelekiso lokuhambelana kweekhemikhali
Utshintsho lwe-viscosity yokuqala ye-paste ye-SA, i-CMC, i-HEC kunye ne-HECMC
Uhlobo lwentlama eluhlaza SA CMC HEC HECMC
Ukuqina/mPa·s
Ukuqina emva kokongeza i-urea/mPa
Ukuqina emva kokongeza ityuwa echasene nokudaya i-S/mPa
Ukuqina emva kokongeza i-sodium bicarbonate/mPa
Ii-viscosities ezine eziphambili ze-paste ze-SA, i-CMC, i-HEC kunye ne-HECMC zahlukile kwiindidi ezintathu eziphambili: i-urea, ityuwa echasene nokudaya i-S kunye
Utshintsho ekongezweni kwe-sodium bicarbonate luboniswe kwitheyibhile. , ukongezwa kwezongezo ezintathu eziphambili, kwintlama yokuqala
Izinga lokutshintsha kwe-viscosity liyahluka kakhulu. Phakathi kwazo, ukongezwa kwe-urea kunokunyusa i-viscosity ye-paste yokuqala malunga ne-5%, nto leyo enokuba
Ibangelwa yimpembelelo ye-urea ethambileyo neyifuthayo; kwaye ityuwa echasene nokudaya i-S nayo iya kwandisa kancinci i-viscosity ye-paste yokuqala, kodwa ayinampembelelo ingako;
Ukongezwa kwe-sodium bicarbonate kunciphisa kakhulu i-viscosity ye-paste yokuqala, apho i-CMC kunye ne-HEC zehla kakhulu, kunye ne-viscosity ye-HECMC/mPa·s.
66
Okwesibini, ukuhambelana kwe-SA kungcono.
SA CMC HEC HECMC
-15
-10
-5
05
I-Urea
Ityuwa echasene nokudaya i-S
i-sodium bicarbonate
Ukuhambelana kwee-pastes zesitokhwe ze-SA, CMC, HEC kunye ne-HECMC kunye neekhemikhali ezintathu
Uthelekiso lozinzo lwesitoreji
Ukusasazeka kwe-viscosity yemihla ngemihla yee-pastes ezahlukeneyo eziluhlaza
Uhlobo lwentlama eluhlaza SA CMC HEC HECMC
Ukusasazwa/% 8.68 8.15 8. 98 8.83
yinqanaba lokusasazeka kwe-SA, i-CMC, i-HEC kunye ne-HECMC phantsi kwe-viscosity yemihla ngemihla yee-pastes ezine zokuqala, ukusasazeka
Okukhona ixabiso ledigri lincinci, kokukhona uzinzo lokugcina lwentlama yokuqala ehambelanayo lungcono. Kuyabonakala kwitheyibhile ukuba uzinzo lokugcina lwentlama eluhlaza yeCMC luhle kakhulu.
Uzinzo lokugcina i-HEC kunye ne-HECMC intlama eluhlaza alukho ngqiqweni, kodwa umahluko awubalulekanga kangako.
Ixesha lokuthumela: Septemba-29-2022