Hloov luam ntawv txoj cai ntawm thermal sublimation
Hloov luam ntawv yog hais txog txheej txheem luam ntawv nyob rau hauv uas dyes tau hloov mus rau ntaub ntawm hloov daim ntawv.Nws yog raws li cov yam ntxwv ntawm qee cov khoom tawg xim zas xim sublimation hauv 150 ~ 230 ° C disperse zas xim sublimation, sib xyaw nws nrog slurry ua los ntawm" xim," raws li kev tsim qauv sib txawv," xim luam ntawv" hloov daim ntawv (qhov no yog daim ntawv tshwj xeeb, yog li ntawd hu hloov daim ntawv), thiab tom qab ntawd hloov cov ntawv thiab cov ntaub npuag sib ze nrog cov qauv tsim kom zoo nkauj, hauv qhov ntsuas kub, lub siab thiab tswj lub sijhawm, zas hloov luam ntawv ntawv rau ntaub, los ntawm sab hauv diffusion. rau hauv cov ntaub, thiaj li ua tiav lub hom phiaj ntawm kev tha xim.
Sublimation txoj kev yog siv sublimation ntawm disperse zas cov yam ntxwv, kev siv molecular hnyav ntawm 250 ~ 400, particle lub taub los ntawm 0.2 mus rau 2 microns ntawm disperse zas xim thiab dej-soluble carrier (xws li sodium alginate) los yog dej cawv cov neeg nqa khoom (xws li ethyl cellulose), roj soluble resin number case, hauv 200 ~ 230 ° C hloov luam ntawv tshuab ua 20 txog 30 vib nas this, ua kom cov xim tawg xim tawg hloov mus rau polyester thiab lwm cov hluavtaws hluavtaws thiab kho.Cov txheej txheem sublimation feem ntau mus los ntawm peb cov txheej txheem: ua ntej hloov chaw, txhua yam dyes yog nyob rau hauv luam ntawv zaj duab xis ntawm daim ntawv, thiab cov zas xim hauv ntawv luam tawm ntaub thiab huab cua sib txawv yog xoom. Qhov loj ntawm huab cua sib txawv nyob ntawm cov qauv ntaub, xov paj suav thiab hloov siab hloov pauv.Nyob rau hauv tus txheej txheem ntawm kev hloov chaw, thaum daim ntawv ncav mus txog qhov hloov chaw kub, qhov zas xim pib ua kom ntog los yog sublimate, thiab cov ntawv ua rau cov volatilization concentration ntawm daim ntawv thiab cov ntawv fiber. Thaum cov ntawv luam tawm ntaub mus txog qhov hloov pauv hloov, lub zas xim pib adsorb rau ntawm fiber ntau qhov chaw kom txog thaum nws mus txog ib qho kev tsim tshwj xeeb.Txij li qhov hloov ntawm cov zas xim los ntawm daim ntawv mus rau fiber ntau yog tas mus li, adsorption tus nqi yog nyob ntawm tus nqi ntawm cov xim sib txawv mus rau hauv lub fiber.Txhawm rau ua kom qhov zas xim tuaj yeem yog qhov kev qhia diffusion, ib sab ntawm tus ncej hauv qab ntawm lub zas yog feem ntau nqus kom ua cov zas xim ua tiav cov kev qhia diffusion thiab hloov mus.Tom qab cov txheej txheem hloov txheej txheem, cov ntsiab lus zas xim ntawm daim ntawv poob qis tom qab cov xim tau pleev xim, thiab qee qhov zas hloov mus rau sab hauv ntawm daim ntawv. Tus nqi ntawm cov zas seem nyob ntawm lub vapor siab ntawm cov xim, qhov sib xyaw xim ntawm qhov zas rau qhov muab tshuaj lossis hloov cov ntawv, thiab cov tuab ntawm luam ntawv zaj duab xis.Sublimation cov txheej txheem feem ntau tsis tas yuav muaj cov tshuaj ntub dej, uas tuaj yeem txuag lub zog thiab txo lub nra ntawm cov dej phwj tuaj.
Hloov luam ntawv tsis yog tsuas yog tsim rau cov xov hluavtaws, tab sis kuj rau ntuj fiber ntau ntshiab thiab sib xyaw ua ke.
Nws muaj cov kev zoo hauv qab no:
(1) tsis muaj dej, tsis muaj dej phwj;
(2) cov txheej txheem thev naus laus zis luv, kev luam ntawv tom qab yog qhov khoom tiav, tsis tas yuav muab cub, ntxuav thiab lwm yam kev lag luam;
(3) cov qauv zoo nkauj, nplua nuj thiab ntshiab txheej, ua yeeb yam zoo thiab muaj zog peb sab, uas yog qhov qis dua rau cov qauv luam tawm dav dav, thiab tuaj yeem luam cov qauv thaij duab thiab pleev xim;
(4) luam ntawv muaj xim zoo nkauj. Nyob hauv tus txheej txheem sublimation, tar hauv lub zas xim yog sab laug rau ntawm daim ntawv xa mus, uas yuav tsis paug cov ntaub;
(5) cov khoom zoo heev, hloov pauv tuaj yeem luam tawm ntau dua ib qho qauv xim tsis tas yuav ua paj;
(6) hloov tau yooj yim, cov qhua tuaj yeem xaiv cov qauv tuaj yeem luam tawm hauv lub sijhawm luv.
Qhov zoo thiab daim ntawv thov ntawm hloov luam ntawv:
Hloov luam ntawv muaj cov yam ntxwv ntawm lub teeb nrawm, dej tsis kam, muaj zog xim ceev thiab nplua nuj xim, thiab lwm yam Nws tuaj yeem siv rau kev luam ntawv khaub ncaws, cov ntaub ntawv hauv tsev (kab hlau rhuav, rooj zaum, ntaub pua rooj, kaus, kab hlau rhuav, nra) thiab lwm yam khoom.Kev lag luam muaj ntau pua tus qauv thiab cov ntaub los xaiv.