Carbonless daim ntawv muab faib ua nplooj ntawv sab saud lossis CB daim ntawv (Coated BackPaper), nplooj ntawv nruab nrab lossis CFB daim ntawv (Coated Front & BackPaper) thiab sab qis lossis CF daim ntawv (Coated Front Paper).
Cov yam ntxwv ntawm CB coatings thiab lawv cov kev ua tau zoo:
CB coatings yog tsim los ntawm chromogenic tus neeg sawv cev microcapsules, spacers, adhesives, additives thiab dej.
1. Microcapsules yog cov khoom tseem ceeb tshaj plaws ntawm CB txheej. Qhov zoo thiab ntau npaum li cas ntawm microcapsules yog ze ze rau kev tsim xim ntawm cov ntawv tsis muaj carbonless. Cov ntsiab lus ntawm microcapsules feem ntau yog 40% mus rau 50%, feem ntau yog tsim los ntawm cov xim tsis muaj xim, cov ntaub ntawv phab ntsa thiab Emulsifier muaj pes tsawg leeg. Qhov zoo ntawm microcapsules feem ntau cuam tshuam rau cov xim rendering nyhuv, lub teeb ceev ceev, thiab muaj kuab paug.carbonless luam ntawv.
2. Kev siv cov spacers nyob rau hauv CB coatings yog los tiv thaiv ntxov ntxov rupture ntawm microcapsules nyob rau hauv lub zog ntawm sab nraud quab yuam thaum lub sij hawm batching thiab txheej txheej txheem. Cov hmoov txhuv nplej siab tam sim no yog qhov siv dav tshaj plaws hauv CB txheej. Lub ntsiab zoo Performance index ntawm lub spacer yog qhov loj ntawm particle loj. Nws yog feem ntau yuav tsum tau hais tias lub spacer nrog ib tug particle loj nyob rau hauv thaj tsam ntawm 15-25 μm yuav tsum account rau 60-80%, thiab particle loj yuav tsum tsis txhob ntau tshaj 40 μm. Tus nqi ntawm spacer feem ntau yog 30% mus rau 50% ntawm tus nqi ntawm microcapsules (qhuav piv). Qhov loj dua qhov me me ntawm microcapsules lossis qhov tsis muaj zog ntawm microcapsules, qhov xav tau ntau dua.
3. Feem ntau muaj ob hom adhesives siv nyob rau hauv CB coatings, ib tug yog carboxylated styrene-butadiene latex thiab lwm yam yog hloov starch. Tseem muaj ob peb lub tuam txhab uas siv polyvinyl cawv (PVA) nrog cov hmoov txhuv nplej siab hloov. Ntawm lawv, tus nqi ntawm carboxylated styrene-butadiene latex feem ntau yog 3% mus rau 4% (rau xim, qhuav piv), thiab tus nqi hloov pauv hmoov txhuv nplej siab feem ntau yog 10% mus rau 12% (rau xim, qhuav piv).
4. Cov additives siv nyob rau hauv CB coatings muaj xws li dispersants, sodium carboxymethylcellulose (CMC) thiab preservatives. Cov dispersant yog sodium polyacrylate, qhov ntau npaum li cas yog feem ntau 0.2% mus rau 0.3% (rau xim, qhuav piv), thiab ntau npaum li cas ntawm sodium carboxymethylcellulose (CMC) yog feem ntau 0.5% mus rau 1.5% (Rau coatings thiab qhuav piv), nws yuav ua tau. kho raws li qhov xav tau ntawm viscosity ntawm txheej. Tus nqi ntawm preservatives feem ntau yog 0.5% (rau starch, qhuav ratio).
Cov yam ntxwv ntawm CF coatings thiab lawv cov kev ua tau zoo:
CF coatings feem ntau yog tsim los ntawm cov xim, xim tsim, nplaum, additives thiab dej.
1. Lub hom phiaj ntawm kev siv txheej pigments raucarbonless luam ntawv yog sau thiab npog qhov tsis sib xws ntawm daim ntawv hauv paus, txhim kho cov xim dawb thiab opacity ntawm daim ntawv, txhim kho qhov smoothness thiab gloss ntawm daim ntawv saum npoo, thiab ua rau saum npoo ntawm daim ntawv muaj cov xim zoo nkauj thiab zoo nqus, thaum kawg tau txais qhov zoo. luam ntawv nyhuv. Cov xim tseem ceeb siv hauv CF txheej yog kaolin thiab calcium carbonate.
2. Cov xim tsim los siv hauv CF coatings feem ntau yog phenolic resin, thiab ib qho me me ntawm zinc salicylate yog siv ua ke nrog nws. Lub hom phiaj tseem ceeb ntawm kev siv zinc salicylate yog txhawm rau txhim kho xim kev loj hlob sai ntawm cov ntawv tsis muaj cov pa roj carbon monoxide, tshwj xeeb tshaj yog nyob rau qhov kub thiab txias. . Tus nqi ntawm cov xim tsim tawm feem ntau suav rau 11% mus rau 13% ntawm tag nrho cov xim (qhuav piv), thaum qhov piv ntawm phenolic resin rau zinc salicylate feem ntau yog 10: 1 (qhuav piv), qhov sib ntxiv ntawm zinc salicylate tus nqi yuav tsum tsis txhob. yuav ntau dhau, txwv tsis pub nws yuav ua rau kom muaj kuab paug ntawm daim ntawv.
3. Feem ntau muaj ob hom adhesives siv hauv CF txheej, ib qho yog carboxylated styrene-butadiene latex thiab lwm yam yog hloov cov hmoov txhuv nplej siab. Ntawm lawv, tus nqi ntawm carboxylated styrene-butadiene latex feem ntau yog 4% mus rau 5% (rau xim, qhuav piv), thiab tus nqi ntawm cov hmoov txhuv nplej siab hloov pauv feem ntau yog 12% mus rau 14% (rau xim, qhuav piv).
4. Cov additives siv nyob rau hauv CF coatings muaj xws li dispersants, sodium carboxymethyl cellulose, foam inhibitors, lubricants, preservatives thiab caustic soda. Tsis tas li ntawd, thaum tsim cov ntawv xim, cov xim ntxiv rau cov xim muaj xws li cov hmoov liab, daj hmoov, emerald xiav thiab emerald ntsuab, thiab cov xim sib xws ntawmcarbonless luam ntawvcov khoom tsim muaj xim liab, daj, xiav thiab ntsuab.
Post lub sij hawm: Apr-03-2023