Los ntawm daim ntawv ua mus rau kev laus kev xeem
Peb yog ib lub lag luam loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv nyuaj, 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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Hais txog lub ntsiab lus ntawm daim ntawv pov thawj (Permanence), tab sis txawm tias cov koom haum txawv kev tshawb fawb tau txais kev pom zoo hauv lub tswv yim, tseem muaj qee qhov txawv ntawm qhov kev piav qhia. Rau ISO (Lub Koom Haum Thoob Ntiaj Teb rau Kev Xamxwm) thiab ANSI (Lub Tebchaws Asmeskas Cov Qauv Kev Cai Tsim Ua) ua piv txwv ob lub koom haum. Tus qub txhais lub caij nyoog ntawm daim ntawv ntawm daim ntawv tom qab lub sij hawm ntev yog tseem muaj peev xwm tswj nws lub cev thiab tshuaj ruaj khov ntawm qhov (Lub peev xwm nyob tsis sib xws thiab lub cev ruaj khov ntev ntev), thaum tom kawg muaj ib ntau ncauj lus kom ntxaws thiab cov lus piav qhia ntawm daim ntawv ua tiav. Nws txhais tau hais tias daim ntawv yuav tsis tshwm nyob rau hauv qhov chaw siv thiab cia chaw nyob ntawm lub tsev qiv ntawv los yog ntaub ntawv vault tom qab tsawg kawg yog ob peb xyoos. teeb meem loj zuj zus (lub peev xwm ntawm daim ntawv mus txog tsawg kawg yog ob peb xyoo tsis muaj teebmeem loj dua nyob rau hauv kev siv thiab kev cia nyob rau hauv cov tsev qiv ntawv thiab cov ntawv sau). Lub deterioration ntawm daim ntawv hais saum toj no hauv lub ntsiab txhais feem ntau to taub raws li cov kev hloov hauv cov yam ntxwv ntawm daim ntawv, thiab qhov paub zoo dua yog lub zog ntawm daim ntawv thiab qhov ci ntsa ntawm daim ntawv (Brightness - qhov ntsuas rau ntsuas yellowing of the ntawv).
Qhov ntau ntawm lub cev thiab tshuaj ntawm daim ntawv hloov thaum lub sij hawm, mas vim yog qhov kev sib hloov ntawm cellulose (Cellulose) thiab hemicellulose (Hemicelluloses) cov khoom muaj nyob hauv daim ntawv Degradation). Tus nqi ntawm qhov degradation nyob ntawm qhov kub thiab txias, cov ntsiab lus dej ntawm daim ntawv (piv txwv li qhov chaw ntub dej ntawm thaj chaw cia khoom) thiab pH ntawm daim ntawv. Cov kev tshawb fawb tau qhia tias pH plays lub luag haujlwm tseem ceeb hauv daim ntawv ua haujlwm. Feem ntau ntawm daim ntawv uas peb siv rau kev luam ntawv yog Acid Paper, uas ceev txog cov laus ntawm daim ntawv. Cov chiv acidic nyob rau hauv daim ntawv tuaj ntawm tus neeg sawv cev ntawm tshuaj dawb tso rau hauv txheej txheem papermaking; cov tshuaj ua rau lub degradation ntawm cellulose thiab hemicellulose (vim yog lub acidity, cov tshuaj no yuav ntxiv catalyze qhov degradation ntawm cov fiber); lub sizing ntawm daim ntawv Sizing Agent-Pom zoo rau cov lus ntawm daim ntawv thiab txhim kho cov dej haus ntawm daim ntawv. Feem ntau, nws siv acidic Alum thiab Rosin. Ntxiv nrog rau fibers, lwm cov khoom uas ua rau cov ntawv sau yog siv los sau rau qhov chaw ntawm cov fibers thiab fibers, thiab muab qee yam nyhav rau daim ntawv; txheej, thiab lwm yam. Yog tias peb xav tau daim ntawv kom muaj lub cev, cov txheej txheem papermaking, peb tuaj yeem siv siv qhov nruab nrab los yog alkaline, thiab tib lub sijhawm siv cov ntxhuav ntawm alkaline xws li calcium carbonate (Calcium Carbonate) . Alkaline Ntawv. Cov ntawv Alkaline muaj txiaj ntsig zoo ntawm cov kua qaub ntawm cov tshuaj, cov ntawv luam tawm, thiab lwm cov kab mob uas ua los ntawm kev ua kom tsis zoo. Rau cov nqi pH (tus nqi pH - muaj kev cuam tshuam txog tus yeeb yam pH, qhov nqi 7 yog nruab nrab, qhov tseem ceeb tsawg tshaj 7 yog acidic, tsawg dua tus nqi, cov qis dua; tus nqi qis tshaj 7 yog alkaline, tus nqi loj, alkaline yog siab dua.) Cov ntawv nyeem Alkaline siab tshaj 7, tseem hu ua cov ntawv tsis muaj kua qoob loo. ANSI kuj tseem hais meej tias cov pH ntawm daim ntawv yuav tsum tau txhais ntawm pH 7.5 thiab pH 10.
Yog tias peb xav kom txo cov kev ceev ntawm daim ntawv, ntxiv nrog rau pib ntawm daim ntawv nws tus kheej, qhov chaw preservation yuav tsum tswj kom nruj. Kub nce toj; cov dej sib tov cov pa oxygen hauv cov pa oxidise cov cellulose; lub teeb, tshwj xeeb yog lub teeb ci thiab lub teeb ci ultraviolet; cov pa phem tuaj yeem ua rau lub plhaub taum los ntawm cov kua qaub rau cov organic acid thiab ua kom cov laus hlob zoo. Yog li, qee cov ntaub ntawv lossis cov phau ntawv tseem ceeb yuav tsum tau muab khaws cia thaum tsis muaj lub teeb, cua txias, kom sov thiab ruaj khov.
Ntau lub koom haum tshawb nrhiav, xws li TAPPI (Technical Association of Pulp & Paper), ASTM (American Society for Testing and Materials), ISO, thiab lwm yam, tag nrho kev cia siab rau simulate natural cov ntawv ntawm daim ntawv los ntawm kev laus laus. . Feem ntau, qhov no yog xav kom ua raws li kev laus ntawm daim ntawv. Peb muaj peev xwm khwv yees tias cov ntawv pov thawj ntawm cov ntawv thiab cov kev hloov ntawm cov khoom xyaw thiab cov khoom ntawm daim ntawv tom qab lub sij hawm ntev hauv ib lub sij hawm luv luv. Cov koom haum tsim tau cov kev sib tw sib txawv rau txhua tus neeg ua raws li. Nqa TAPPI txujci T544 ua piv txwv. Nws yog kawm txog kev laus ntawm daim ntawv los ntawm qhov muab daim ntawv rau hauv qhov kub ntawm 50% kwv yees txheeb ze thiab qhov kub ntawm 90 ° C ntev. Vim lub ntsuas kub thiab cov av ntawm cov ntawv cia, cov kev tswj kav mus ntev yuav tsum tau nyob ntawm qhov ruaj khov. Yog li ntawd, los mus ua kom tiav hom kev sim no, nws yog ib qho tseem ceeb uas yuav tsum muaj Environmental Chamber uas yuav saib xyuas qhov ntsuas kub thiab cov av qis kom ua raws li cov kev cai ntawm qhov kev xeem. Yuav kom twv tau qhov kev hloov ntawm daim ntawv laus cov txheej txheem ntawm cov ntawv cim, peb txoj kev xav yog ntsuam xyuas cov yam ntxwv ntawm daim ntawv ua ntej thiab tom qab hnub nyoog kev laus laus, thiab muab piv rau lawv. Qhov kev xaiv ntawm cov ntawv sau hom ntawv yog nyob ntawm qhov kev xav tau ntawm tus neeg siv, thiab tuaj yeem ua cov khoom siv xws li Folding Endurance, Tensile Zog, Tearing Resistance; ntawv Optical zog xws li Brightness, Opacity, thiab tshuaj lom neeg xws li pH. Txawm li cas los xij, nws muaj ib qho taw qhia uas cov nyeem yuav tsum them nyiaj rau. Txog rau tam sim no, qhov kev kuaj kev laus ntawm daim ntawv muaj tsuas ceev zuj zus cov txheej txheem kev laus ntawm cov ntawv nyob hauv cheeb tsam tswj lub cev, thiab cov txiaj ntsig tsis zoo li cov ntawv xa daim ntawv laus. Yog li, cov neeg sib txawv Tej zaum yuav muaj kev nkag siab txawv ntawm kev laus kev xeem. Piv txwv: Qee tus neeg yuav txhais cov ntawv hauv ib qho chaw 100 ° C rau 3 hnub, sib npaug li 25 xyoo nyob rau hauv qhov chaw ib puag ncig ntuj, tab sis qee tus neeg to taub txog 300 xyoo. Nws tuaj yeem pom tau hais tias muaj ntau qhov chaw uas tsis muaj kev tshawb nrhiav rau qhov kev tshawb fawb los ntawm kev siv cov laus txoj kev laus kom ntsuam xyuas cov txiaj ntsig. Yog li ntawd, nyob rau theem tam sim no, cov ntsiab lus ntawm cov ntawv pov thawj kev laus laus yog tsim dua rau kev tshawb nrhiav thiab kev siv.