Kev siv cov hmoov diatomite hauv kev ua ntawv yuav tsum muaj kev ua haujlwm tshwj xeeb raws li cov lus qhia ntawm kev lag luam. Cov hlau diatomite nyoos raug ntxuav kom huv si kom tshem tawm cov av nplaum thiab xuab zeb. Tom qab ntawd, nws raug ziab kom qhuav ntawm qhov kub ntawm 100-120 ° C kom khaws nws cov qauv tseem ceeb. Cov txheej txheem sib tsoo ces siv los tsim cov hmoov nrog cov qhov loj me sib txawv ntawm 5-30 μm. Cov khoom me me, feem ntau hauv 5-15 μm, siv ua cov xim pleev xim rau cov ntawv luam ntawv ci ntsa iab, thaum cov khoom loj dua (20-30 μm) ua haujlwm ua cov khoom sau zoo hauv kev sau ntawv thiab ntim ntawv. Qee qib ntawm cov hmoov diatomite raug kho saum npoo nrog cov polymers cationic los txhim kho kev sib raug zoo nrog cov cellulose fibers, kom ntseeg tau tias muaj kev sib kis zoo hauv cov pulp matrix.

Ua ib yam khoom siv rau sau ntawv, hmoov diatomite ua tau zoo dua li lwm yam khoom siv ib txwm muaj xws li calcium carbonate (CaCO₃) lossis kaolin hauv ntau yam. Nws qhov porous xwm ua rau muaj peev xwm tawg lub teeb zoo dua, ua rau daim ntawv opacity zoo dua yam tsis muaj kev nce ntxiv hauv qhov hnyav. Hauv kev tsim cov ntawv luam ntawv, hloov 10-15% ntawm cov ntoo pulp nrog hmoov diatomite tuaj yeem ua rau TAPPI opacity nce 10-15%. Qhov no tso cai rau cov neeg ua ntawv txo kev siv pulp, yog li pab txo kev puas tsuaj ntawm hav zoov thiab txuag nqi. Piv txwv li, lub Hoobkas ntawv Finnish tau siv 8% hmoov diatomite rau hauv nws cov ntawv luam ntawv offset, ua rau opacity nce ntxiv los ntawm 88% mus rau 96%, txo 12% ntawm kev siv pulp, thiab txo 18% ntawm cov nqi raw. Tsis tas li ntawd, qhov dawb siab ntawm hmoov diatomite (L * tus nqi ≥92) ua kom daim ntawv tswj tau qhov ci ntsa iab, uas yog qhov tseem ceeb rau kev tsim cov ntawv zoo thiab cov duab.

Hmoov Diatomite kuj tseem hais txog qhov kev txwv ntawm cov khoom siv ib txwm muaj los ntawm kev txhim kho lub zog kho tshuab ntawm daim ntawv. Nws cov qauv porous pab txhawb kev sib txuas zoo dua ntawm cov cellulose fibers, ua haujlwm ua "choj" thaum koom ua ke rau hauv lub pulp. Piv rau daim ntawv uas muaj CaCO₃, hmoov diatomite tuaj yeem ua rau lub zog tensile nce 8-12% thiab lub zog rhuav tshem los ntawm 10-15%. Cov cuab yeej no muaj txiaj ntsig zoo rau cov ntawv ntim khoom, uas yuav tsum tau nyiaj dhau kev tuav thiab kev thauj mus los. Piv txwv li, ib lub chaw tsim khoom ntawv ntim khoom hauv Suav teb tau ua tiav qhov kev txhim kho zoo hauv lub zog tawg los ntawm 2.5 kPa · m² / g txog 3.2 kPa · m² / g los ntawm kev koom ua ke 12% hmoov diatomite rau hauv nws cov ntawv corrugated, ua rau daim ntawv txhawb nqa cov khoom hnyav dua yam tsis muaj kev ua tsis tiav.

Kev luam tawm yog lwm qhov chaw uas hmoov diatomite zoo tshaj plaws. Ua ib qho xim pleev xim, nws tsim ib qho chaw du thiab sib xws uas ua rau cov kua nplaum zoo thiab cov duab zoo dua. Hauv cov ntawv tsis muaj ntoo coated, feem ntau siv rau cov ntawv xov xwm thiab cov ntawv teev npe, cov txheej txheem raws li hmoov diatomite qhia txog qhov roughness ntawm qhov chaw (Ra) ntawm 0.5-0.8 μm, piv rau 1.0-1.2 μm rau cov txheej txheem kaolin. Qhov chaw du no ua rau cov duab luam ntawv ntse dua, txo cov kua nplaum los ntawm cov kua nplaum, thiab ua kom cov xim ci dua. Kev sim hauv kev lag luam luam ntawv qhia tau tias daim ntawv diatomite hmoov-coated ua tiav qhov nce ntawm 90-95%, piv rau 80-85% rau cov ntawv coated ib txwm muaj. Ntxiv mus, cov qauv porous ntawm hmoov diatomite nqus tau cov kua nplaum ntau dhau, txo lub sijhawm ziab los ntawm 20-25% thiab yog li txhim kho kev ua haujlwm ntawm lub tshuab luam ntawv thiab txo cov teeb meem tsim khoom.

Cov txiaj ntsig ib puag ncig ntawm diatomite hmoov hauv kev ua ntawv yog qhov tseem ceeb. Los ntawm kev txo cov kev xav tau ntawm cov pulp, nws txo qis kev siv hluav taws xob thiab cov pa roj av uas cuam tshuam nrog kev tsim cov pulp, uas cuam tshuam nrog kev txiav ntoo, kev thauj mus los, thiab kev ua tshuaj lom neeg. Cov chaw ua ntawv uas suav nrog 10% diatomite hmoov qhia txog kev txo qis 10-12% hauv CO₂ emissions. Tsis zoo li cov khoom siv hluavtaws uas yuav tso cov microplastics rau hauv ib puag ncig, diatomite hmoov yog biodegradable thiab tsis muaj tshuaj lom. Kev kho dej khib nyiab kuj yooj yim dua hauv cov chaw ua ntawv siv diatomite hmoov, vim tias cov hmoov tuaj yeem tshem tawm ntawm kev tso dej thiab rov siv dua hauv cov khoom ntawv qib qis dua, txo qis kev tsim cov khib nyiab.

Hauv cov ntawv thov tshwj xeeb, hmoov diatomite muab cov yam ntxwv ua haujlwm tshwj xeeb. Hauv cov ntawv ntim khoom uas tsis muaj roj, feem ntau siv rau cov khoom noj ceev ceev thiab khoom noj txom ncauj, nws cov qauv porous tsim ib qho kev thaiv zoo tiv thaiv roj, muab lwm txoj hauv kev ruaj khov rau cov txheej txheem hluavtaws xws li polyethylene (PE). Ib lub khw muag khoom noj ceev ceev hauv Nyiv tau tshaj tawm tias muaj kev txhim kho 40% hauv kev tiv thaiv roj tom qab hloov mus rau daim ntawv diatomite hmoov hloov kho roj, thaum tswj cov ntawv qhov compostability. Hauv daim ntawv thermal, siv rau cov ntawv txais nyiaj thiab daim ntawv lo, hmoov diatomite ua haujlwm ua tus coj cua sov, txhim kho kev luam ntawv thiab txo kev siv hluav taws xob, yog li ua kom lub neej ntawm cov taub hau luam ntawv thermal ntev dua.

Thaum tsim cov ntawv nrog hmoov diatomite, ntau yam yuav tsum tau xav txog, suav nrog pH sib xws, kev sib kis, thiab cov theem thauj khoom. Hmoov diatomite qhia txog kev ruaj khov hauv qhov nruab nrab mus rau me ntsis alkaline pH ntau yam (6.5-8.0) ib txwm muaj ntawm cov txheej txheem ua ntawv niaj hnub no, tiv thaiv kev puas tsuaj ntawm cov fiber ntau los ntawm kua qaub. Kev sib kis kom zoo, ua tiav los ntawm kev siv hydropulpers lossis dispersers, yog qhov tseem ceeb los tiv thaiv cov khoom me me sib sau ua ke, uas tuaj yeem ua rau cov ntawv tsis zoo xws li cov pob lossis qhov. Cov theem thauj khoom sib txawv nyob ntawm daim ntawv thov: 5-10% rau kev luam ntawv thiab sau ntawv, 10-15% rau ntawv ntim khoom, thiab 15-20% rau ntawv tshwj xeeb. Tshaj 20% yuav ua rau daim ntawv yooj ywm, yuav tsum tau hloov kho rau cov fiber sib xyaw.

Xaus lus, hmoov diatomite tau hloov pauv txoj kev lag luam ua ntawv, muab kev nce qib tseem ceeb hauv kev pom tseeb, lub zog, kev luam tawm tau, thiab kev ruaj khov. Nws lub peev xwm los txo kev siv pulp, txiav cov nqi, thiab txhim kho kev ua haujlwm ntawm daim ntawv tso nws ua cov khoom siv xaiv rau cov chaw tsim ntau yam khoom ntawv. Raws li kev lag luam txuas ntxiv qhov tseem ceeb rau kev saib xyuas ib puag ncig thiab cov khoom zoo tshaj plaws, qhov kev thov thoob ntiaj teb rau hmoov diatomite ua ntawv tau npaj rau kev loj hlob sai. Qhov sib txawv no qhia txog lub luag haujlwm tseem ceeb ntawm cov khoom siv hauv kev tsim lub neej yav tom ntej ntawm kev ua ntawv ruaj khov, tsav tsheb tsim kho tshiab, thiab ua kom tau raws li cov kev xav tau ntawm cov neeg siv khoom thiab cov lag luam ib yam. Kev koom ua ke ntawm hmoov diatomite rau hauv cov txheej txheem ua ntawv sawv cev rau ib kauj ruam tseem ceeb rau kev nrhiav kev ua haujlwm zoo dua, tus phooj ywg ib puag ncig, thiab kev ua haujlwm siab.