Lub luag hauj lwm thiab kev tswj hwm ntawm qhov chaw muab tshuaj tua tawm (ib qho)
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
Yog xav paub ntxiv, thov mus saib
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Offset luam ntawv yog ib txoj kev uas siv cov roj thiab dej tsis txaus sau kom tiav luam ntawv. Ua ntej, muab dej rau cov ntawv luam tawm, thiab muab tus cwj mem los luam rau lub phaj ntawv, kom cov ntawv xov xwm muaj ntu dej thiab dej, thiab cov seem tsis muaj dej thiab tsis muaj kua. Txawm li cas los xij, cov dej siv los ntub cov phaj tsis yog dej tsis zoo, tab sis ib qho tshuaj yeeb dej caw, kua roj electrolyte, uas yog lub hauv paus ciav hlau. Nws yog li paub tias qhov kev ua tau zoo ntawm cov ciav kua yog ib qho ntawm cov tseem ceeb uas pom tau tias cov khoom zoo. Kev ua kom pom ntawm cov ciav dej yog sib xws nrog cov tshuab luam ntawv, ntawv, kua cwj mem, thiab lwm yam los sau cov khoom zoo, yog li ntawd cov teeb meem luam tawm yog kaj thiab tiag tiag, cov txheej yog meej, cov dots yog smooth, tsis muaj o, tsis muaj txo, seem ntawm seem tsis huv, thiab cov ntawv luam yog qhuav ib txwm.
Ua ntej, lub luag haujlwm tseem ceeb ntawm dampening kua
(1) Tsim dej ib zaj yeeb yaj kiab ntawm seem ntawm daim ntawv luam tawm
Ib hom xim dej yog tsim nyob rau hauv seem ntawm daim ntawv luam tawm, thiab tus number case repellency thiab hydrophilicity ntawm cov seem ntawm daim ntawv luam ntawm cov ntawv luam yog cov dej num ntawm cov ciav dej.
(2) Ntxiv cov txheej txheem hydrophilic puas thaum lub sij hawm luam ntawv
Thaum luam ntawv, tus menyuam thiab tus menyuam tus cwj pwm xoom khawm coj los txhuam cov ntawv phaj, ua rau cov txheej txheem hydrophilic nyob rau hauv phaj ntawv luam yuav tsum tau hnav. Tib lub sijhawm, daim ntawv muaj ntau daim ntawv hmoov los yog ntawv cov plaub hau poob thaum lub sijhawm luam ntawv. Txuas ntxiv deepen qhov hnav thiab ua rau cov txheej txheem hydrophilic. Yog li, yog tias tsis muaj lub tshuab ntshiab los ntawm cov kua fais fab, thaum lub sij hawm luam ntawv, txheej hlau ntawm lub phaj luam ntawv tsis tu ncua ua kom haum rau ib txheej tshiab inorganic ntsev hydrophilic txheej, thiab peb tuaj yeem lav tsis tau tias cov seem tsis huv thiab luam tsis tiav.
(3) txo cov npoo npoo ntawm cov ntawv phaj
Thaum lub sij hawm luam ntawv, txij li thaum tus tub muab khau rau ntawm kev kub ceev, nws qhov nce ntawm qhov kub thiab qhov kub ntawm tus cwj pwm kuj nce. Thaum muaj kev kub siab, cov kua xau ntawm tus cwj pwm ntawm cov kua xau yog txo qis dua thiab lub cev muaj zog tuaj. Yog li, thaum luam ntawv, tus number case kis ceev ceev, uas yog siv los ua kom lub koom haum nthuav dav thiab cuam tshuam txog cov teeb meem luam tawm. Txawm li cas los xij, hauv cov txheej txheem luam ntawv, kev siv dampening yog siv, uas tuaj yeem txo qhov ntsuas ntawm cov ntawv xov xwm, thiab txo tau cov teeb meem no.
Qhov ob, qhov kev faib tawm ntawm kev daws teeb meem
Cov tshuaj tsis haum yog feem ntau muab faib ua: 1 cov tshuaj tsis haum dampening; 2 txhuam cov tshuaj pleev kom sov; 3 non-ionic surfactant dampening kua.
Cov tshuaj lom neeg ntxiv ntxiv rau cov tshuaj tsis haum zoo nkauj yog cov inorganic compounds xws li phosphoric acid, phosphate, nitrate, thiab lwm yam, uas muaj qhov siab nro tsis zoo thiab cov neeg pluag tsis muaj zog, tab sis cov uas tsis tshua muaj nqi thiab yooj yim.
Cawv dampening kua yog ntxiv nrog ethanol, isopropyl cawv los yog lwm yam cawv. Nws muaj qhov tsis tshua muaj siab nro thiab kev nti zoo. Nws yog tsim rau lithographic printing presses nruab nrog cawv wetting system.
Cov cwj pwm ntawm cov cawv yog cov neeg tsis muaj zog, uas tuaj yeem ua kom tshem tawm cov cua sov ntawm cov ntawv xov xwm thiab txo cov av ntawm lub phaj. Tom qab ntxiv haus cawv mus rau dej, qhov dej nro ntawm cov dej tuaj yeem txo, kom cov dej tuaj yeem sai thiab sib npaug, thiab phau ntawv muab faib rau ntawm daim ntawv luam tawm. Yooj yim kom ncav cov cwj mem thiab dej kom zoo, thaum luam tawm, siv dej tsawg tsawg, thiab qhov tseeb ntawm kev kho dua. Tus nqi haus cawv feem ntau tswj ntawm 12% thiab 20%. Qis qis yuav ua rau lub phaj qias, thiab qhov kub ntawm cawv feem ntau tswj ntawm 4 thiab 12 ° C.
Kev siv tshuaj ntsuab dampening uas yog nonionic surfactant yog ib txoj kev dampening tshiab tsim nyob rau xyoo tas los no. Nws feem ntau yog npaj los ntawm kev ntxiv ib qho tshuaj tiv thaiv nonionic rau dampening kua muaj lwm cov electrolytes. Raws li cov txheej txheem nonionic, polyoxyethylene, polyoxypropylene ether, thiab alkyl amide amide feem ntau siv. Nws muaj cov yam ntxwv ntawm qhov uas tsis tshua muaj siab nro, qhov kev ua kom zoo thiab cov khoom ua kom ruaj khov. Nws yog ib qho zoo rau dampening tov rau high-speed multi-xim lithographic printing presses. Txawm li cas los xij, yog tias txoj kev tswj tsis zoo, tus lej mis emulsification tuaj yeem tshwm sim tau.