Cov kev tshwm sim ntawm kev tshaj tawm txog kev ua haujlwm ntawm xim luam ntawv
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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Nyob rau hauv cov luam ntawv ntawm cov ntawv xov xwm xim, cov ntawv xov xwm yog ib qho chaw, thiab cov ntaub ntawv nraaj yog thaum kawg muab rau cov nyeem ntawv los ntawm ntawv. Yog li ntawd, qhov zoo tshaj ntawm cov ntawv xov xwm luam ncaj qha cuam tshuam qhov zoo ntawm cov xim xim kawg. Tus smoothness, number case absorption, whiteness, mechanical zog thiab qhov ntev ntawm daim ntawv yuav cuam tshuam cov luam zoo ntawm cov ntawv xov xwm xim.
Ua ntej, lub smoothness ntawm newsprint
Hauv kev luam ntawv, thawj qhov kev mob siab tau txais ib daim luam uas yog ncaj ncees rau tus thawj yog lub plab ntawm lub newsprint. Lub smoothness ntawm newsprint qhia txog cov degree ntawm unevenness ntawm tus qauv microscopic duab ntawm cov ntawv xov xwm. Tsuas yog muaj qee qhov kev txawj ntse ntawm qhov kev ua haujlwm tau zoo ntawm kev luam ntawm cov duab thiab cov lus sau tseg. Muaj ntau lub qhov hws thiab qhov khib nyiab rau ntawm daim ntawv xov xwm. Yuav kom tau txais cov nyhuv luam tawm, qhov ntawd yog, tus kabmob yog qhov tseeb, tus number case yog tsis zoo, thiab cov khaubncaws sab nraud povtseg yog qhov zoo, daim ntawv yuav tsum sib txuas lus nrog daim pam. Yog tias koj xav tau cov cuab yeej nplua nuj thiab tiag tiag, koj yuav tsum muaj cov xim plaub-plaub rau ntawm daim ntawv kom ntau li ntau tau. Lub smoothness ntawm daim ntawv plays ib tug decisive luag hauj lwm. Yog hais tias tus smoothness me me, tus number case yuav tsis nyob rau hauv daim ntawv qhia txog tas nrho cov ntawv, thiab cov me dots yog inevitably ploj thiab tsis tag. Vim li no, cov lus ntawm daim ntawv yog ib qho tseem ceeb rau kev txiav txim siab txog cov xov tooj ntawm cov npo thiab muab cov phiaj xwm zoo. Daim ntawv uas muaj siab nyob rau hauv daim ntawv muaj peev xwm muab tau tus cwj pwm kom txaus, thiab tus cuav quav yog lub teeb, lub thickness yog teeb, tus number case hloov siab npaum li cas, qhov sib sib zog ntawm cov ntawv teeb meem loj siab, cov khoom poob nqis yog qhov me me, cov xim nplua nuj , thiab qhov kev tsim rov muaj zog. Cov ntaub ntawv nrog pluag smoothness muaj tsis tiav dots, tsis muaj tiag tiag li xim, thiab pluag xim reproducibility. Ua kom lub cev tau zoo dua, muab cov khoom xaj thiab luam tawm ntawm tus cwj mem nias ua rau qhov tsis txaus thiab falseness ntawm cov ntawv luam vim qhov sib txawv ntawm qhov txig. Txawm li cas los xij, qhov tsim nyog ntawm qhov no yog qhov tshaj tawm qhov loj, cov kev kho me me yog muab cov luam tawm, thiab cov xim nraub qaum. Nws kuj tseem tuaj yeem luam ib qho xim sib zog ua ntej ua kom tiav lub hom phiaj ntawm qab. Yog li ntawd, cov ntawv xov xwm xim yuav tsum siv cov ntawv xov xwm zoo.
Thib ob, lub ntsiab lus ntawm cov ntawv ceeb toom
Daim ntawv yog cov ntaub ntawv ntawm cov duab qhia, thiab nws cov ntsiab lus ncaj qha cuam tshuam cov xim ntawm cov teeb meem luam tawm. Thaum lub teeb hits daim ntawv, nws yog absorbed ib feem, thiab tus nqi ntawm nqus nyob ntawm nws cov whiteness. Qhov siab tshaj qhov dawb, qhov ntau lub teeb yog to taub. Tom qab tus number case yog xa mus rau ntawm daim ntawv, xim yog tsim los ntawm cov xim sib rho thiab cov xim ntxiv rau txoj kev. Yog hais tias cov ntaub ntawv tsis tshua muaj zog, lub teeb ntawm qhov tob tshaj plaws yog absorbed, thiab cov xim ntawm cov cwj mem tsis tuaj yeem siv tau tag nrho, uas cuam tshuam cov Hawj txawm, teeb ci thiab qhov xim ntawm cov duab xim, ua rau cov xim tsaus, tsis zoo sib xws, tsis muaj kev loj hlob, thiab ob peb theem.
Qeb peb, tus cwj pwm tsis txav ntawm ntawv xov xwm
Tus cwj mem absorbency ntawm daim ntawv muaj qhov hloov thiab nkag mus rau ntawm tus number case rau hauv ntawv. Nws tsis yog ntawm lub peev xwm ntawm kev xa xov mus rau absorb lub thev npog tuav, tab sis kuj nyob rau ntawm absorption ntawm tus number case los ntawm newsprint nyob rau hauv lub imprinting tej yam kev mob, yog li tus number case absorbency yuav tsum daim ntawv. (Cov ntawv xov xwm) thiab qhov kev ua rau ntawm tus cwj mem raws li cov xwm txheej luam tawm, uas yog, qhov zoo ntawm cov cwj pwm tsis haum, tsis yog nyob ntawm kev ua tiav ntawm cov ntawv xov xwm, tab sis kuj yog nyob ntawm kev ua tau zoo ntawm tus cwj mem thiab luam ntawv. Thaum twg cov ntawv xov xwm raug tsau lawm, hloov cov ntawv ntawm tus cwj mem los yog cov zwj ceeb luam ntawv yuav ua rau muaj kev hloov hauv cov cwj pwm kua txav. Tus cwj pwm kua ntim quav (directing) muaj kev cuam tshuam cov ziab ntawm tus cwj mem qhuav ntawm daim ntawv saum npoo ntawv, thiab cuam tshuam txog cov xim zoo thiab lub plhaub ntawm tus cwj pwm. Tus cwjpwm ntawm tus cwj pwm tsis txaus yog qhov qhia txog kev ua kom haum thiab daim ntawv pov thawj ntawm daim ntawv luam tawm, tsis yog tsuas muaj feem xyuam nrog cov ntaub ntawv saum npoo, porosity, compressibility, adsorption, thiab lwm yam, tiam sis kuj nrog number case composition, rheology thiab Dryness thiab cov zoo li hais txog kev luam ntawv, kev luam ntawv, thiab lub sij hawm tsis txaus siab.
Lub smoothness ntawm newsprint yog tsawg, thiab nws yog tsis yooj yim sua kom tau txais ib tug loj npaum li cas ntawm hloov nyob rau hauv ib tug me me ntawm number case khoom. Thaum tus lej muab nqi txaus txaus, tus number case txheej yog coj los rau ntawm qhov chaw ntawm daim ntawv thaum lub sijhawm luam, thiab muaj ntau npaum li cas ntawm cov ntaub ntawv hloov tau. Yog li no, tus nqi ntawm cov cwj pwm hloov ntawm kev sib txawv yog nyob ntawm qhov chaw ntim ntawm daim ntawv. Yuav kom ua tiav cov nyhuv luam tawm, raws li cov xwm txheej, tus nqi ntawm cov xaum xoom yuav tsum tau txiav txim siab raws li cov khoom ntaws ntawm daim ntawv kom tau raws li tus nqi ntawm tus curing uas yuav tsum tau muaj rau cov ntaub ntawv sib txawv thiab tus nqi ntawm cov ntawv dawb yuav tsum tau npog saum npoo yog phua ntawm daim ntawv. Tus nqi ntawm number case.
Thaum lub sij hawm hloov ntawm tus cwj pwm mus rau ntawm daim ntawv, tus cwj pwm ntawm tus cwj mem nkag mus los ntawm qhov kev txwv thiab qhov siab, thiab feem ntawm qhov chaw siv tsho tawm hauv lub cev thiab tshuaj hloov los ua ib lub pob yeeb ziab qhuav. Yog hais tias tus lej cim ntawm daim ntawv yog loj heev, tus lej ntawm tus lej cim yog loj, thiab ntau ntau lub pob ntawv thiab ib feem ntawm cov pigment hais yog nqus mus rau sab hauv ntawm daim ntawv, yog li ntawd cov xim pigment tsis zoo, tiv thaiv tsis muaj kev txaj muag, hmoov, ziab, thiab tsaus nti ntawm tus cwj mem. Lub teeb, txo qhov ci ntsa iab ntawm cov xim, thaum lub caij sov, Hawj txawm yog cuam tshuam. Thaum twg tus number case absorbing yog me me, tus ntaw zaj duab xis yog tuab, thiab qhov ceev ntom siab siab, uas yog ib qho kev zoo rau kev luam xim. Yog tias tus nqi number case loj dhau lawm, sab nraum qab yog qhov yooj yim heev. Lub web offset xovxwm feem ntau siv cov ntawv ceeb toom thiab muaj ceev ceev ceev ceev, yog li ntawv tau muaj ib qho muaj zog ntawm tus cwj pwm nqus peev xwm.
Qeb plaub, qhov ua tiav ntawm cov ntawv xov xwm
Cov nyhuv xim uas ua los ntawm kev hloov mus rau ntawm tus number case los rau ntawm daim ntawv yog nyob ntawm qhov xwm ntawm tus cwj mem, tab sis kuj yog inseparable los ntawm qhov xwm ntawm daim ntawv. Kev luam tawm ntawm cov ntaub ntawv sib txawv nrog tib tus cwj mem tsis zoo tsuas yog siv xim sib txawv thiab sib txawv, tab sis kuj muaj qhov sib txawv ntawm cov xim txawv thiab qhov sib txawv. Txawm tias luam tawm ntawm ob sab ntawm tib daim ntawv, cov xim txawv txawv. Qhov no yog vim hais tias qhov saum npoo ntawm daim ntawv muaj txawv absorbency thiab gloss.
Qhov saum npoo ntawm cov ntawv tsuas yog xam tias absorbency thiab gloss. Kev nqus ntawm daim ntawv no mas yog qhov peev xwm nqus tau dej, thiab tus cim ntawm tus cwj pwm xaj yog qhov nqus lub khob rau ntawm tus cwj mem. Qhov xim ntawm tus cwj pwm ntawm cov xim no yog tom qab muaj qee tus nqi ntawm cov cwj mem zom zaws rau ntawm daim ntawv, tab sis cov teeb ntawm absorbing ntawm tus binder nyob rau hauv tus number case los yog tus number case yog txawv, ua rau cov gloss, xim xim thiab Hawj ntawm tus number case txheej rau ntawm daim ntawv nto rau absorbed. Kev sib deev muaj zog heev; Kev haus me me hloov me ntsis. Gloss yog cov khoom siv kho qhov muag ntawm cov nplais ntawm daim ntawv - qhov kev soj ntsuam ntawm cov qauv qhia meej. Cov theem ntawm gloss nyob ntawm lub plob sab hauv ntawm daim ntawv thiab qhov xwm ntawm cov khoom tsim daim ntawv. Tus cwj mem yog qhuav thiab dawb ntawm daim ntawv, thiab qhov sib xyaw thiab tsis ua tiav tom qab ziab thiab sib txuas tes yuav tsum tau cuam tshuam los ntawm qhov chaw ntawm daim ntawv, ua rau muaj xim txawv. Kev ua haujlwm saum npoo av yog siab. Nyob rau hauv tib co mob, xim khov ntawm tus number case yog qhov loj tshaj plaws thiab cov xim ua haujlwm thiab qhov ntsuas nplai yog qhov tsawg tshaj plaws. Txwv tsis pub, qhov xim ntawm lub ink number txheej yog tsawg, cov xim sib txawv thiab lub nplai grey yog tus siab, thiab cov xim tshauv overprint tshuav tshuav yog qhov nyuaj.
Them nyiaj rau cov ntaub ntawv xovtooj ntawm cov ntawv xovtooj yog cov kev pabcuam zoo los tsim kho kom muaj cov xim zoo nkauj, vim tias cov ntaub ntawv ntawm cov ntaub ntawv tuaj yeem muab cov ntaub ntawv tseem ceeb rau qee qhov teeb meem zoo, uas yog pab rau kev nrhiav qhov teebmeem. Nyob rau hauv lub phaj ua thiab luam ntawv, raws li qhov ntxo ntawm daim ntawv, xim hloov xim thiab grey nplai ntawm tus cwj pwm xim zoo raug kho, yog li ua tiav gray tshuav ntawm cov xim sib tshooj thiab txo cov yam cuam tshuam rau cov xim zoo.
Thib tsib, cov neeg ua haujlwm dag zog ntawm ntawv xov xwm
Rau hauv web offset presses, vim newsprint muab tshuaj txhuam. Nws cov neeg ua haujlwm dag zog yog qhov tseem ceeb tshaj uas cuam tshuam txog kev luam ntawv. Qhov no feem ntau tshwm sim hauv ob qho: tensile lub zog thiab qhov chaw siab zog. Daim ntawv txoj kab ntawm lub web offset xovxwm yog feem ntau ntev. Thaum lub sij hawm ua tus txheej txheem ceev ceev, qhov nro ntawm txhua qhov ntawm txoj kab ntawv sib txawv thiab qhov txawv yog qhov loj. Thaum lub nro tshaj lub zog tensile, daim ntawv so, uas cuam tshuam rau kev luam ntawv. Lub zog ntawm daim ntawv ceeb toom yog ib qho tseem ceeb qhia kev ua haujlwm. Thaum lub sij hawm luam ntawv, thaum tus number case yog nruab nrab ntawm daim ntawv thiab daim pam, nws tau tev tawm vim yog daim kab xev ntawm tus cwj mem thiab daim adhesion ntawm daim pam thiab daim ntawv. nro. Thaum cov tawv nruj qis tshaj qhov muaj zog ntawm sab nraud (qhov sib dhos ntawm lub voj voos saum npoo), daim ntaub nplaum tawm ntawm lub nruab nrab thiab lub plhaub nyob ib ncig ntawm lub pawm pwm, ua rau daim ntawv zom zom thiab pam daim pam. Qhov saum npoo ntawm daim ntawv no raug rau kev sib tawb kom tsim cov hmoov, lint, thiab txav ntawm daim pam. Thaum ib qho nqi luam tawm, yog daim ntawv hmoov thiab cov ntaub ntawv muaj plhuav dhau lawm, cov ntawv tsis zoo, thiab cov ntawv me me lov tus cwj mem, uas cuam tshuam txog qhov kev luam ntawv zoo, thiab tseem ua rau cov lus sib tsoo los txo cov kev pab lub neej vim lub siab nce. . Rau cov xim nyias nyias, tus number case txheej pauv mus rau saum npoo ntawm ntawv. Cov xim yog bleak thiab tsis nyob hauv cov txheej, thiab cov kev tshaj tawm nthuav dav heev. Txij thaum tus number case yog "ntub-ntub dej" hloov thaum lub sij hawm luam ntawv ntawm cov ntawv xov xwm xim, kuj muaj "cov plaub hau ntub". Yog li, nyob rau hauv cov luam tawm ntawm cov xim qhia, ntxiv nrog rau cov ntawv uas muaj siab zog, qhov kev ntsuas yuav tsum tau ua, thiab qhov tsis txaus yog qhov me me. Xim number case yog tsim nyog rau hauv kev luam ntawv siab thiab luam ntawv ceev.
Rau, sixth dimensional ntawm cov ntawv xov xwm
Ntawv tshaj tawm yog ua los ntawm cov nroj tsuag fibers. Qhov nto yog qhov dej paug thiab hydrophilic thiab hygroscopic. Cov dej cov ntsiab lus muaj ib qho txiaj ntsim zoo rau nws txoj kev nyob ruaj ntseg. Nyob rau hauv txoj kev ntawm cov xim luam ntawv, nws yuav tsum tau hu dej ob peb zaug, ua rau muaj kev dimensional dimensional. Ntau ntau. Qhov ntev ntawm kev ruaj ntseg tsis tsuas yog cuam tshuam ncaj qha rau txoj kev kawm nce qib ntawm luam ntawv, tab sis kuj cuam tshuam qhov zoo ntawm cov teeb meem luam tawm. Variations nyob rau hauv seem stability muaj telescopic thiab seem kev hloov hauv planar qhov ntev. Newsprint yog hygroscopic ntau thiab yog li ntawd muaj tsis ruaj ntseg stability. Dimensional stability yog txawv nyob rau sab nrauv txawv. Rau cov ntawv xov xwm, vim nws cov neeg ua haujlwm tsis muaj vaj tse, kev ruaj ntseg ntawm qhov chaw muaj txiaj ntsig zoo rau txoj kev kawm zoo ntawm kev luam ntawv thiab nrhiav tau cov khoom zoo, tsis li ntawd nws yuav ua teeb meem xws li daim ntawv cuam tshuam, luam ntawv wrinkles, thiab overprinting cov txheej txheem luam ntawv. Cov ntawv xov xwm yuav tsum tswj cov cua kub thiab av noo thaum lub sij hawm thauj mus los thiab cia kom tsis txhob muaj kev hloov loj, txwv tsis pub nws yuav muaj kev cuam tshuam ntau dua rau qhov chaw ruaj ntseg.
Nyob rau hauv luv luv, newsprint yog ib qho khoom siv luam ntawv uas tsis tsim nyog luam ntawv hauv ntawv xov xwm, nws qhov kev ua tau zoo.