Ikhwalithi yokubukeka yokuphrinta iglue emhlophe enwebekayo iwukubonakaliswa kwangaphandle kwekhwalithi nekhwalithi yayo, okubandakanya isimo sokubukeka, ukucoleka kanye noketshezi lokuphrinta ingcina emhlophe enwebekayo. Ukubonakala kweglue emhlophe yokuphrinta yekhwalithi enhle kufanele kube uketshezi olufanayo, unamathisele omhlophe we-viscous omhlophe, othambile futhi olinganiselayo, uketshezi oluhle, kanye nendawo ecwebezelayo. Kodwa-ke, ikhwalithi empofu yokuphrinta ingcina emhlophe emhlophe ivame ukuba nokuqina okunezingqimba, uketshezi oluncane, ukugeleza nokuhlukaniswa kwamanzi, i-viscosity eyeqile, nomzimba ofana nokunamathisela ngesikhathi sokugcina, okuthinta ngokuqondile ikhwalithi yayo, umbala, amandla okumboza, ukumelana kwamanzi, ukulinganisa, ukungaboni, isicwebezelisi, isivuno sombala nezinye izakhiwo.
Kunezici eziningi ezithinta ikhwalithi yokubukeka yokuphrinta iglue emhlophe enwebekayo: izinto ezingavuthiwe ezifana ne-resin (i-adhesive) yokumanzisa nokuhlakaza i-ejenti, i-thickener, filler kanye nefomula yayo kanye nenqubo yokukhiqiza izoyithinta.
Izizathu Ezithinta Ikhwalithi Yokubukeka Yokuphrinta I-Elastic White Mucilage
1. Igrisi into eyenza ifilimu yokuphrinta ingcina emhlophe enwebekayo. Ngesikhathi sokuphendula kwe-polymerization yamakhemikhali ye-resin, izinga lokushisa, isikhathi, isivinini sokuphendula, ukugcinwa kokushisa, isivinini esishukumisayo kanye nokwengezwa kwezithasiselo kuzodala ukusabela kwamakhemikhali okungaphelele kanye nensalela Ama-monomers amaningi kakhulu azobangela ukungazinzi kwamakhemikhali nomzimba, futhi inhlaka izophinde ihlangane futhi ihlangane. , okuholela ekudaleni ukuphrinta kweglue elimhlophe elinwebekayo, iphunga elinamandla, ukunamathela okungalungile, ukuvinjwa kwenethiwekhi nezinye izici ezingazinzile. Ngakho-ke, i-resin kufanele ibe nokusimama okuhle kwamakhemikhali, ukuzinza kwesitoreji, ukunwebeka okuhle, ukunamathela okuqinile, ukuthamba kanye nezici ezingezona induku.
2. Uma ubheka isivinini sokudiliza (umthetho kaStokes)
V=218r2(P-P1)/η
Kufomula: isivinini esiwela i-V, ㎝/s; irediyasi engu-r-particle, ㎝;
ukuminyana kwezinhlayiyana ze-P-pigment, g/cm3; Ukuminyana koketshezi lwe-P1, g/cm3
η-usayizi wezinhlayiyana eziwuketshezi, 0.1pa.s
Isivinini se-sedimentation yesigcwalisi sinobudlelwane obuningi nokucoleka kokugaya, okungukuthi, uma ukuqina kokugaya okukhulu, isivinini se-sedimentation yesigcwalisi sizophindaphindeka. Ukuphrinta iglue emhlophe enwebekayo kuzohlukanisa amanzi futhi kuntante zibe yizingqimba ngesikhathi esifushane. Ngakho-ke ubuhle obujwayelekile bungaphakathi kwe-15-20μm. Kodwa-ke, izinhlayiya ze-pigment ezicwebezelayo zibambezela kuphela ukuzinza futhi azivimbeli ukuzinza. Ukuphrinta iglue emhlophe enwebekayo kuwuketshezi lwe-viscous olune-non-Newtonian fluidity, futhi i-viscosity yayo kufanele ikalwe nge-viscometer ejikelezayo.
3. Umthelela wokuphrinta izithasiselo zeglue ezinwebekayo ezimhlophe
I-ejenti yokumanzisa neyokuhlakaza ku-mucilage omhlophe onwebekayo wokuphrinta ingahlakaza ngokulinganayo izigcwalisi ezihlukahlukene. Inethiwekhi exegayo yethulwa ekubunjweni kwayo ukuze yenze izinhlayiya zokugcwalisa zimiswe ngaphandle kokucwiliswa, kunciphise ngempumelelo i-viscosity ye-slurry, futhi kuvimbele ukuphrinta kwe-mucilage emhlophe enwebekayo ukuthi ingantanti. kanye nezingqimba zemvula; Ukwengezwa kokulinganisa kunciphisa ukuzibamba phakathi kwamaketanga e-macromolecular, kunciphisa ukungqubuzana kwezinto futhi kunciphisa i-viscosity. I-thickener idlala indima ebaluleke kakhulu ekulungiseni izinga lokubukeka lokuphrinta iglue emhlophe enwebekayo.
4. Umthelela wokuphrinta inqubo yokukhiqiza iglue emhlophe enwebekayo
Ijubane elidlulele le-agitator lizokwenza ukuthi i-resin ikhishwe yi-shear ephezulu, futhi ukwengezwa okungalungile kwezithasiselo ezifana nama-dispersants, ama-flow agents, kanye nama-thickeners kuzoholela ekuqothulweni kwe-glue emhlophe yokuphrinta kanye nokwakhiwa kwezinhlayiya zejeli. Lawula isikhathi, izinga lokushisa kanye nokwenza kahle komkhiqizo wenqubo yokukhiqiza.
Ukubukeka Indlela Yokulawula Ikhwalithi Yokuphrinta I-Elastic White Glue
1. Khetha inhlaka efanele izidingo zefomula
I-resin iyingxenye ebaluleke kakhulu yefomula yeglue emhlophe yokuphrinta. Ama-resin ahlukene anokusabalalisa usayizi wezinhlayiyana ezihlukene, ukuzinza kwe-ion yamakhemikhali, ukuzinza kwemishini, amanzi-ngamafutha, uwoyela emanzini kanye ne-hydrophilicity, enethonya elikhulu ekubukeni. Ngakho-ke, lapho ukhetha i-resin, kuyadingeka ukucabangela ngokugcwele izici ze-resin ngokwayo, ikakhulukazi ukuhambisana kwe-resin, ukuze uqondise ukukhethwa kwama-fillers kanye nezithasiselo kwifomula yenqubo.
2. Qondanisa kahle ne-disperant kanye ne-level ejenti
Ama-ejenti okulinganisa kanye nezisabalalisi ezikhiqizwe abakhiqizi abahlukene banamanani ahlukene we-HLB. Ngokuvamile, izisabalalisi kanye nama-ejenti okulinganisa (asekelwe emanzini) anamanani amakhulu e-HLB azonciphisa i-viscosity yesistimu kakhulu; ngokwanda kwamanani e-HLB, izinhlobo ezahlukene zokuhlakazeka kanye nama-ejenti okulinganisa zizonciphisa i-viscosity yesistimu futhi zithinte i-resin Futhi enkulu. I-hydrophilic dispersing and leveling agent izothuthukisa ukuzinza kwesitoreji seglue emhlophe ephrintayo, futhi i-hydrophobic dispersing and leveling agent izothuthukisa ukumelana nokukhuhla kweglue emhlophe yokuphrinta ngemva kokwakhiwa kwefilimu. Ngakho-ke, inhlanganisela ye-hydrophilic ne-hydrophobic dispersing and leveling agents ingathuthukisa ngempumelelo isitoreji sokuphrinta iglue emhlophe enwebekayo. Uma i-ejenti yokusabalalisa kanye ne-leveling eyengeziwe yengezwa, i-hydrophilicity yayo kanye ne-fluidity izothuthukiswa, kodwa ukushesha kwayo ukuwasha kuzoncishiswa futhi ukumelana kwayo kwamanzi kuzokwehla. Uma i-ejenti yokusabalalisa encane kakhulu yengezwa, izothinta ngokuqondile ikhwalithi yokubukeka kwayo, ngakho-ke ngokuvamile kufanele ilawulwe phakathi kuka-3% -5%.
3. Ukukhetha okunengqondo kwama-thickeners ukuthuthukisa ukusebenza kokuphrinta iglue emhlophe enwebekayo
Njengamanje, izinto eziwugqinsi ezivame ukusetshenziswa ekunyatheliseni ingcina emhlophe enwebekayo zihlanganisa: i-polyacrylic acid, i-cellulose ether, i-alkali-soluble acrylic, kanye ne-non-ionic associative polyurethane.
Ama-cellulose thickeners (ikakhulukazi ahlanganisa i-hydroxypropyl methyl cellulose, i-hydroxyethyl cellulose, ne-hydroxypropyl cellulose) asebenza kahle kakhulu ukuqina nokuzinza okuhle, kodwa izinga eliphansi futhi kulula ukubangela amamaki ewebhu ekuphrinteni kwesikrini, futhi anomthelela othile ekucwebezeleni kwe-slurry. Ama-thickeners e-polyurethane abiza kakhulu futhi awavamile ukusetshenziselwa ukuphrinta iglue emhlophe enwebekayo. Ama-thickeners e-Polyacrylic acid anezakhiwo ezinhle zokulinganisa, akulula ukukhiqiza amamaki enethiwekhi, akuthinti ukucwebezela kwe-slurry, anokumelana kahle namanzi kanye nokuzinza kwezinto eziphilayo, futhi abe nokuhambisana okuhle, ukuze kwakhiwe izixhumanisi zamangqamuzana phakathi kwezinhlayiya, okuholela ku-Resin. -i-filler-resin yakha isakhiwo senethiwekhi, ihlinzeka ngesivinini esiphezulu se-shear esiphakathi nendawo, okwenza i-glue emhlophe yokunyathelisa ibe ne-rheology engcono, futhi yenza ukubonakala kwe-milky white fluid semi-paste.
4. Sebenzisa inqubo yokukhiqiza efanele
I-thickener kufanele ihlanjululwe ngamanzi ngaphambi kokwengeza. I-resin kufanele yengezwe kuqala, futhi i-agitator kufanele igcinwe ngesivinini esiphakathi nendawo ukugwema ukukhishwa kwe-resin okubangelwa ukugunda ngokweqile. Phakathi nenqubo yokukhiqiza, i-viscosity ye-slurry kufanele ibonwe nganoma yisiphi isikhathi, futhi isivinini esishukumisayo kanye nokushisa kwe-slurry ngesikhathi sokukhiqiza kufanele kulawulwe kahle. Futhi ngaphambi kokulungisa i-slurry, engeza inani elifanele le-surfactant ukuvikela izinhlayiya ze-resin ekukhishweni kwe-demulsification.
Isikhathi sokuthumela: Mar-04-2023