Txhuam cov pam vov thiab cov thawv ntim quav
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.
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Tshooj 1 Wetting thaum lub sij hawm luam ntawv
Ntu 3 Txhuam cov pam vov thiab cov thawv ntim quav
Qhov pam vov ntawm daim pam thiab tus cwj mem xaws, cov kev hloov hauv cov dej nyob rau lub sij hawm luam ntawv, tseem ceeb heev rau kev lag luam, tshwj xeeb tshaj yog cov khoom lag luam luam tawm.
Ua ntej, lub wettability ntawm daim pam thiab nws cov kev hloov
Daim pam yog ib nrab ntawm cov ntawv hloov ntawm cov ntawv xov xwm. Thaum lub sij hawm luam ntawv, daim pam yuav tsum sib txuas nrog tus cwj mem ntawm cov ntawv xov xwm luam tawm thiab nrog cov dej ntawm seem ntawm daim ntawv luam tawm. Yog li, daim pam feem ntau yog tsim los ntawm cov khoom siv roj khov uas tsis yog hnav roj hmab los xyuas kom meej tias daim pam tawm tus cwj mem rau qhov siab tshaj plaws thiab hloov mus rau tus cwj mem, thiab minyuam yaus adsorbs ya raws; daim pam yuav tsum tau muaj cov roj zoo tshaj plaws, cov kua qaub av tsis haum, oxidation tsis ua hauj lwm thiab kev laus ua hauj lwm, thiab lwm yam. Ua kom daim pam daim ntawv zoo tshaj plaws, ntxiv rau xaiv cov khoom siv roj hmab uas tsim nyog los ua daim pam, hauv cov txheej txheem luam ntawv, yuav tsum ceev nrooj ntawm daim pam daim av kom ntau li ntau tau ntawm txoj haujlwm.
1. Lub wettability ntawm daim pam. Daim pam muaj ib txheej ntawm kua nplaum thiab lub hauv paus ntaub. Lub txheej nplaum muaj txheej nplaum nplaum rau hauv cov ntaub qhwv lub hauv paus thiab txheej txheej nplaum rau qhov muab tus cwj mem los hloov. Lub ntsiab ntawm cov roj hmab yog cov roj hmab thiab hluavtaws roj hmab.
Cov roj hmab hluav taws xob tuaj yeem xav txog kev ua ib lub polymer ntawm cis isoprene monomer.
Lub luj ntawm lub cev roj hmab yog txiav txim siab txog 200,000 rau 500,000. Yog li, qhov degree ntawm polymerization n yog ib tug ntawm cov kabmob. Nyob rau hauv ib txwm mob, ntuj roj hmab yog ib tug long-line molecule tsim ntawm txhiab tus cis isoprene polymers, thiab cov zauv txuas cov khoom sib xyaw ua ke ua curled ua ke kom lawv txawj ywj. Txawm li cas los xij, ntuj roj hmab muaj cov khoom uas tsis tshua muaj zog xws li txav thiab ua haujlwm tsis zoo, tsis muaj av qeeg, yooj yim los nplaum thiab nkig vim muaj cua sov, thiab ua rau lub cev deformation thiab laus. Txhawm rau txhawm rau kov lub cev nqaij ntawm cov roj hmab, ib tus neeg sawv cev cwj pwm (feem ntau yog leej faj) yog ntxiv rau lub hnab roj hmab kom zoo rau cov roj hmab, kom qee qhov sib txuas ntawm cov hlua khi hlua khi tawm, thiab cov tshuaj hnoos yog siv " choj "rau daim phlaub. Tus choj hla kev sib tw sib txuas ua ke thiab ua ib qhov qauv ntawm peb lub network.
Cov qauv roj hmab qauv tom qab vulcanization pom muaj hauv daim duab 1-21. Raws li pom tau los ntawm daim duab, tus kab sulfur atom bonds lub roj hmab molecules ntawm cov qauv tsim los tsim ib plurality mesh lattices, yog li txhim kho cov khoom siv dag zog thiab lub cev ntawm cov roj hmab.
Txawm hais tias tus yam ntxwv ntawm cov khoom siv los ntawm cov roj hmab uas kho tau zoo dua tuaj, qhov tseem ceeb tshaj yog txo qis thiab kev ua kom muaj zog. Qhov no yog vim hais tias qhov ntau dua tus neeg saib xyuas qhov txuas ntxiv yog ntxiv, qhov sib ntxiv ntawm kev sib txuas, thiab ntau cov kab uas muaj ntsis zoo li uas muaj feem xyuam los ntawm cov khoom xyaw sulfur. Raj roj hmab nrog ib qho me me ntawm leej faj, thiab hnyav rubber nrog ib sulfur ntsiab lus ntawm 10% los yog ntau tshaj. Cov roj hmab siv rau daim pam muaj tsawg dua leej faj, zoo elasticity thiab tsis tshua muaj zog. Cov roj hmab khov rau cov tub ntxhais rau kev luam tawm sib txawv hauv cov tawv los ntawm qhov nyiaj ntawm leej faj ntxiv.
Vulcanized natural rubber yog tseem tsis zoo hauv cov roj ua hauj, tshwj xeeb tshaj yog thaum nws nyob rau hauv kev sib txuas nrog cov organic solvents xws li kerosene ntev, nws yuav maj mam swell thiab deform. Yog li no, ntuj roj hmab tsis haum rau cov roj hmab txheej ntawm daim pam. Txij li thaum lub roj hmab cog qoob loo muaj cov nplaum loj loj, cov ntaub npog ntawm daim pam yuav tsum sib raug zoo ua ke, thiab feem ntau siv los ua ib txheej puab ntawm daim pam. Txawm li cas los xij, hauv cov txheej txheem luam ntawv los yog thaum tu daim pam, nws yog ib qho tsim nyog los tiv thaiv kev nkag mus ntawm cov organic solvent xws li roj ntsha kom tiv thaiv tau cov roj hmab ntawm qhov o thiab ua rau daim pam "npuas" lossis "plhaub".
Tam sim no, lithographic luam feem ntau siv tus lej uas muaj resin, thiab cov phau ntawv pov thawj uas muaj cov kab uas muaj siab kub nyhiab, uas yuav tsum tau hais tias lub hnab tawv nqaij ntawm daim pam yuav yog roj-resistant, yog li cov av nplaum ntawm daim pam feem ntau muaj roj tsw qab zoo. Synthetic roj hmab ua cov khoom siv raw.
Cov roj hmab hluavtaws ua rau txheej txheej ntawm daim pam yog neoprene lossis nitrile roj hmab.
Neoprene yog polymerized los ntawm chloroprene.
Vim tias muaj cov tshuaj chlorine, neoprene tau zoo coj los ua haujlwm, roj ua haujlwm, ua kom tsis muaj teeb meem kub, ua kom tsis muaj zog, ua kom tsis muaj zog thiab cua nrawm dua roj hmab tshwj tsis yog tias nws cov elasticity thiab txias tiv thaiv. Cov khoom qub yog tshwj xeeb zoo, thiab nws raug lub teeb thiab cov pa oxygen ntev ntev, thiab cov qauv ua tsis tau yooj yim lawm, thiab lub cev thiab cov khoom siv cuab yeej tseem muaj peev xwm tswj tau.
Nitrile roj hmab yog ib tug copolymer ntawm butadiene thiab acrylonitrile nyob rau hauv muaj ib qho pib.
Vim muaj cov cyano (-CeneN los yog -CN) hauv cov roj hmab nitrile, cov roj thiab cov hnyav kuj ua tau zoo thiab zoo.
Roj hmab tsis tuaj yeem sib piv.
Nyob rau hauv cov roj molecules ntawm neoprene thiab nitrile roj hmab, muaj cov kabmob sab qaumteb xws li cyano thiab chlorine atoms (-CI), uas yuav ua kom muaj ncov qaumteb qabteb, tab sis lawv tseem tsis-ncov qaumteb thiab muaj peev xwm khaw tau. Moisten. Yuav kom ntxiv txhim khu lub lipophilic thiab hydrophobic cov cuab yeej ntawm cov roj hmab ntawm daim pam, ib cov nqi ntawm cov yas vinyl acetate-vinyl chloride copolymer ntxiv rau roj hmab ntawm daim pam. Txawm li cas los xij, qhov pam vov pauv ntawm kev siv pauv thaum siv.
2. Cov kev hloov hauv qhov kev ntes ntawm daim pam daim av. Daim pam pav los ntawm pam lub tog raj kheej ntawm lub tshuab luam ntawv tshuab luam ntawv. Thaum lub sij hawm ntxoov txheej txheem ntawm lub rollers, txhua lub tsev me me ntawm daim pam yog lub sij hawm hu nrog lub phaj luam ntawv thiab cov substrate. Cov lej ntawm lub phaj, dampening tov, lub substrate (cov hmoov ntawv uas tau poob rau ntawm daim ntawv) thiab daim pam yuav muaj teeb meem ntawm lub cev thiab cov tshuaj, thiab qhov yuav hloov cov ntaub ntawm cov ntaub pam tuag.
Thaum lub sij hawm luam ntawv, vim yog lub cev adsorption, ib lub ntsej muag mas yog tsim ntawm nplaum nplaum txheej ntawm daim pam. Cov kab no mas feem ntau yog tsim los ntawm kev txuam nrog cov khoom xws li ntawv hmoov txheej, cov fibers cog, thiab xim xim ntawm tus cwj mem. Feem ntau ntawm cov khoom nyob rau hauv lub masking txheej yog polar, thiaj li hais tias non-polarity ntawm daim pam tsis muaj zog, lub polarity yog nce, lub lipophilicity yog qis, thiab lub hydrophilicity yog nce. Nyob rau hauv txoj kev no, tus cwj mem ntawm daim duab ntawm cov phaj luam ntawv, tshwj xeeb yog tus number case nyob rau ntawm lub micro dot, tsis tuaj yeem muab pauv mus rau lub substrate los ntawm daim pam thaum lub sij hawm high-speed imprinting, uas ua rau lub embossing ntawm cov teeb meem luam tawm thiab qhov poob ntawm cov teev. Rau lwm tus tes, vim tias qhov dej paug ntawm daim pam yuav nce ntxiv, nws yuav hloov ntau lub dampening kua los ntawm lub phaj ntawm daim luam ntawv rau daim ntawv, kom cov ntsiab lus ntawm dej ntxiv, qhov loj yog elongated, tus overprinting tsis yog muaj tseeb , thiab nyob rau tib lub sijhawm, daim ntawv Lub zog ntawm sab deg yog degraded, thiab cov ntaub ntawv ntawm cov txaj ntawm cov hmoov pam ntawm cov hmoov ntawv thiab cov ntaub plaub yog nce, uas ua rau cov khoom ua tsis tau. Qhov no yuav tsum tau tu lub pam thiab ua kom rov ua kom zoo li qub ntawm daim pam.
Muaj ntau ntau daim ntawv cog lus ntawm ob lub hnab roj hmab hluav taws xob. Cov ntawv cog lus uas tsis tsim nyog tau txais kev sib tw yog yooj yim rau cov pa, uas hloov cov qauv ntawm cov roj hmab thiab ua rau "laus".
Tom qab lub hnab roj hmab yog hloov, feem ntau ntawm ob lub hnab nyiaj raug puas tsuaj los ntawm kev tsim ntawm ib tug "kaub puab tus choj", tab sis ib qho nyiaj tsawg tsawg ntawm ob daim ntawv cog lus nyob twj ywm. Cov khoom sib txuas hluavtaws xws li neoprene thiab nitrile roj hmab muaj ntau tshaj ob qho khoom pov rau hauv lub ntsiab saw ntawm cov qauv molecular. Yog li no, cov roj hmab puab txheej thiab cov nplaum rubber uas yog tsim los ntawm roj hmab thiab cov roj hmab hluavtaws hluavtaws kuj tseem yog yooj yim oxidized thiab laus. tshwm sim.
Daim pam yog ua nyob rau hauv qhov teeb meem ntawm lub teeb, thiab lub hnab roj hmab yog hnub nyoog ntev, thiab ib qho yeeb yaj kiab yees duab zoo nkauj ua rau saum npoo. Txij li thaum zaj duab xis heev, nws tsis tsuas yog lub qhov ncauj qhov ntswg thawj qhov ntawm daim pam, tab sis kuj tag tshem tawm qhov kev txiav txim ntawm capillary ntawm qhov saum npoo, thiab kev hloov cov lipophilic hloov qis dua.
Tom qab daim pam poom, nws ua rau kub laus, uas ua rau txheej npoo tawv, nplaum, thiab txawm tawg, thiab tsis tuaj yeem siv. Ntxiv mus, thaum lub sij hawm hloov ntawm tus cwj pwm, daim pam yuav raug rau qhov kev nyuab siab ntawm lub phom sij thiab lub tswv yim lub tswv yim, thiab qhov sib txawv ntawm kev nyuaj siab yog siab (tshwj xeeb tshaj yog lub siab ceev muag tshuab luam ntawv), yog li Kev noj haus ntawm cov roj hmab yog loj. Lub tshav kub tso tawm ua rau kub ntawm daim pam txheej kom sawv, uas nyob rau hauv lem exacerbates lub tshav kub laus ntawm daim pam txheej. Yuav kom qis qeeb ntawm thermal aging ntawm daim pam, qhov rhiav yuav tsum nruj nruj tswj qhov kev hloov ntawm qhov kub thiab humidity kom ua tiav qhov ntsuas kub thiab qhov av. Hauv kev luam ntawv, nws raug pom zoo kom siv cov ntawv luam tawm cov cwj mem luam tawm. Ntawm qhov tshuab luam ntawv ultra-high offset tshuab, cov dej thiab tus cwj mem zas xim rau siv los ua kom txias thiab dissipate cov hluav taws kub kom muaj lub qhov dej ntawm daim pam.
Qhov thib ob, qhov kev xuas nti ntawm cov quav cuav thiab nws cov kev hloov
Cov cuav tus number case yog siv los thauj tus cwj mem los ntawm cov ntawv xovxwm. Yuav kom kis tau tus cwj pwm piv txwv ntawm tus cwj mem xiav, lub tshuab luam ntawv feem ntau yuav tsum ua raws li tus qauv ntawm qhov muag thiab caj dab rigid, kom cov xov tooj uas nyob ib sab muaj kev sib cuag zoo.
1. Cov mob uas nyob hauv tus cwj mem xiav ntub tus cwj mem number case. Txhua tus tub ntxhais uas muaj cov lipophilicity zoo tau txais cov cwj mem los ntawm tus npaug yav dhau los thiab tom qab ntawd hloov cov cwj pwm uas tau txais mus rau tus neeg khaus npav tom ntej. Nyob rau hauv txoj kev no, tus cwj mem xiav ntub dej ntawm cov npoo ntawm tus cuav thiab tom qab ntawd ua rau cov quav cuav quav. Yog hais tias qhov dej ntawm tus cuav khov no yog γSG, qhov nro ntawm tus cwj mem zis yog γLG, thiab qhov nro ntawm qhov quav ntawm tus number plays thiab tus number case yog γSL, qhov kev ua hauj lwm ntawm Adhes Wa ntawm tus number case rau tus number case yog :
Wa = γSG + γLG-γSL
(1-23)
Txoj hauj lwm sib koom tes Wc ntawm tus number case nws tus kheej yog
WC = 2γLG (1-24)
Thaum cov hauj lwm cohesive Wc ntawm tus cwj pwm muaj ntau dua qhov ua kom qeeb zog Wa ntawm tus neeg quav caws quav rau tus cwj mem, uas yog, WC
γSG> γLG + γSL (number case adhesion)
γSG <γlg +="" γsl="" (number="" case="">
Cov khauj muag ntawm cov mos lwj uas siv rau hauv xovxwm printing feem ntau yog ua los ntawm cov ntaub ntawv zoo li polymer cov roj hmab, hluavtaws hluavtaws, cov roj hmab thiab polyurethane. Txawm hais tias qhov yob ntawm cov mos mos ntawm cov mos mos muaj qhov sib txawv, qhov ntim quav rau cov ntaub ntawv muaj qhov zoo lipophilicity, yog li tus lej ntub tau ntub dej rau sab nraud thiab koom rau qhov ntawd.
Cov tawv tawv plhaub siv rau hauv tshuab luam ntawv feem ntau yog ua los ntawm cov khoom siv hlau xws li hlau lossis tooj. Qhov yob ntawm cov hlau uas muaj hlau khov yog lub hau siab zog, γSG >> γLG + γSL, thiab nws yog qhov pom tias tus lej ntub tau ntub dej tawm zoo thiab kev sib koom ua ke.
2. Cov kev hloov hauv cov dej khov ntawm cov quav cuav. Cov cwj pwm kua muag muaj feem ntau ua cov roj hmab, thiab cov khoom ntim thiab lwm cov khoom muaj peev xwm tib yam li cov neeg hauv daim pam. Txawm li cas los xij, txoj kab uas hla tus cwj mem xees yog ob peb zaug me tshaj ntawm txoj kab uas hla ntawm lub phom lub tog raj kheej. Yog li, qhov tshaj tawm ntawm tus cwj mem xauv npoo ntawm tus cwj pwm ntawm tus kheej yog ntau tshaj li ntawm ntau zaus dua li tus npoo ntawm lub plhaub kheej kheej, ces qhov kub cua kub nce hauv ib lub sij hawm ntawm kev sib txhuam kev sib txhuam. Nws yog qhov zoo tshaj plaws uas kub thaum pib tshwm sim rau ntawm tus npoo ntawm tus cuav quav hlau, ua rau tawv tawv, tawg, thiab tej daim me me kom poob. Tsuas yog cov ris tsho ntawm lub tshav kub laus txheej uas tau tsim muaj peev xim rov muab tus thawj oleophilic number case hloov ntawm tus number case number. Yuav kom qeeb cov cua kub hnyiab ntawm cov roj hmab, cov tub ntxhais uas muaj lub plhaub rau hauv tshuab luam ntawv yuav tsum tau nruab nrog txias thiab cua txias. Thaum lub sij hawm luam ntawv, nws tseem yog ib qho tseem ceeb kom tiv thaiv tau tus cwj mem tawm ntawm lub zauv ntawm tus npoo ntawm tus cag quav thiab ziab tus cwj mem ntawm tus cwj mem xau rau thaum ntxov, thiab tshem tawm cov xuav kua txig seem uas nyob hauv cov quav cuav quav. Tom kawg ntawm luam ntawv, yuav tsum muab tus ntivtes xaws rau hauv.
Cov kauj ruam uas tawv khov sib txawv nyob rau hauv cov dej khib nyiab thaum luam ntawv vim muaj qhov sib txawv hauv cov ntaub ntawv.
Qhov khau ntawm cov khawm xov tooj ntawm ib qho offset yog ua los ntawm hlau hlau, xws li J2101 offset xovxwm. Cov hlau nws tus kheej muaj pluag lipophilicity. Thaum cov kua dej dampening loj loj thiab tus cwj mem yog emulsified tiag, cov kua roj electrolyte los ntawm cov kua dej los sis hydrophilic colloid, uas yog muab faib rau hauv tus cwj pwm ntawm cov kua nplua nuj, thiab yog adsorbed by iron. Cov yeeb yaj kiab hydrophilic yog tsim los ntawm cov tammem rau cov menyuam, thiab lub lipophilic muaj peev xwm txo qis, thiab tus number case yog nyuaj adhere rau qhov ntawm cov quav cuav quav, thiab feem ntau tshwm tau tawm. Nyob rau hauv cov ntaub ntawv ntawm tus cwj pwm, tsuas yog lub cev los yog tshuaj txoj kev siv los tshem tawm cov txheej txheem hydrophilic, thiab tus number plob tsis pub muaj peev xwm muab rov qab tau cov ntaub ntawv tseem ceeb ntawm tus cwj pwm thiab muab xa tawm.
Ib txheej ntawm tooj hlau tooj yog plated rau ntawm qhov hlau ntawm cov hlau cuav quav ua ib qho hlau tooj liab uas tsis muaj hlau cuav quav. Piv txwv, lub J4102 offset xovxwm siv lub khob cij npab npog, uas meej meej tau zoo dua cwj pwm hloov dua li cov hlau cwj mem hlau. Txawm li cas los xij, tooj liab yog ib qho hlau uas yooj yim oxidized, thiab tshwj xeeb tshaj yog nyob rau hauv cov xaim emulsified, qhov mob ntawm cov kua dej ntim muaj oxidizing tus kab mob, thiab cov xoom npoo yog oxidized rau daim CuO (tooj liab oxide). Ntawm qhov tod tes, cov roj hmab muag hauv tshuab luam ntawv lub inking system yuav maj mam desulfurize thaum lub cwj pwm hloov. Cov khau tooj liab tooj cuav yuav muaj kev sib txuas nrog nws ntev, thiab yuav tsim cov xim dub nyob hauv qhov chaw sib txuas lus, uas yog tshwm sim los ntawm tooj liab thiab leej faj. Cov tshuaj tiv thaiv ua Cu2S (tooj liab sulfide) thiab CuS (tooj liab sulfide). Cov npoo npog npog los ntawm CuO, Cu2S, CuS, oleophilic number case absorption txo, ua rau lub phenomenon ntawm "deinking", uas feem ntau yog tshem tawm nrog 10% dilute nitric acid kom tshem tawm cov zaj duab xis ntawm lub npoo ntawm cov tooj liab khaus npog.
Polymers xws li hluavtaws thiab cov khoom uas yog cov khoom tsis yog hnav roj thiab muaj cov khoom zoo lipophilic. Yog hais tias muaj zog thiab hnav-resistant polymer yog poured rau cov tub ntxhais khaus ntawm cov hlau khov rau cov tub ntxhais hluas rau cov khau tawv rubber, tsis tsuas yog tus number case hloov dua siab tshiab, tab sis kuj yog ib qho dej tsis muaj dej hauv inorganic ntsev lossis adsorption tsis tso rau ntawm yob nto. Hydrocolloid, tus number case rau cov neeg tsis tshua muaj deinks. Qee yam ntawm cov ntawv luam tawm tshiab yog tam sim no sib tw rau kev siv cov ntaub ntawv siab polymer rau cov zuaj nplaum. Txawm li cas los, lub zog ntawm txhua yam ntawm cov cuav quav hlau no tsis zoo li cov hlau. Siv, tsis txhob sib tsoo thiab xauv mem khi riam phom.
Lub plhu uas hnyav hnyav hnyav heev yog tib yam li cov roj hmab khov thiab cov pam. Cov hnyav ua haujlwm tsis zoo. Thaum tu tus cwj mem xaws number case, nws tsim nyog xaiv ib txoj dej kom haum los npaj tus neeg tu neeg tu. Txwv tsis pub, qhov saum npoo ntawm tus cuav quav yuav plhis thiab yaj, thiab cov roj hmab txheej yuav raug cuam tshuam. Poob thiab tsis siv.