Daim ntawv Kraft yog tsim los ntawm cov txheej txheem vulcanization, uas ua kom ntseeg tau tias daim ntawv kraft zoo meej rau nws siv. Vim muaj cov qauv ntxiv rau kev tawg resilience, tearing, thiab tensile zog, nrog rau qhov xav tau kev txo qis stiffness thiab porosity siab heev, daim ntawv kraft zoo tshaj plaws muaj qhov xav tau siab rau xim, texture, sib xws, thiab tus nqi zoo nkauj.
Yuav kom ua tau raws li cov qauv xim thiab kev zoo nkauj, cov pulp yuav tsum tau bleached kom ua tiav qhov ci ntawm 24% thiab 34% thaum tswj cov xim daj thiab liab ntawm cov pulp kom ruaj khov, uas yog, tswj cov khoom ruaj khov ntawm cov pulp dawb.
Cov txheej txheem tsim ntawv kraft
Cov txheej txheem tsim ntawv kraft suav nrog cov theem hauv qab no.
1. Kev sib xyaw ua ke ntawm cov khoom siv raw
Txhua hom txheej txheem ua ntawv zoo sib xws, tsuas yog txawv ntawm qhov zoo, tuab, thiab ntxiv cov yam ntxwv ntxiv. Daim ntawv Kraft yog ua los ntawm cov ntoo fiber ntev, thiab nws muaj qhov ntsuas khoom zoo dua. Cov txheej txheem ua rau muaj kev sib xyaw ntawm cov ntoo mos thiab cov ntoo tawv uas ua tau raws li cov qauv zoo rau cov ntawv kraft zoo. Cov ntoo nplooj dav suav txog kwv yees li 30% ntawm tag nrho cov khoom tsim tawm. Qhov piv ntawm cov khoom siv raw no tsis muaj kev cuam tshuam rau lub zog ntawm daim ntawv, tab sis nws muaj kev cuam tshuam loj rau qhov ci thiab lwm yam.
2. Ua noj thiab ua kom dawb
Cov ntaub pua plag Kraft yuav tsum muaj tsawg dua cov pob zeb ntxhib thiab xim sib xws, nrog rau ua tau raws li qhov yuav tsum tau ua rau cov txheej txheem ua noj thiab ua kom dawb zoo. Nws tau txais kev lees paub dav dav tias kev ua noj thiab ua kom dawb zoo sib txawv ntawm cov qauv ntoo. Yog tias cov kab pulp tuaj yeem cais cov ntoo mos thiab cov ntoo tawv pulping, cov ntoo mos thiab cov ntoo tawv ua noj thiab ua kom dawb tuaj yeem xaiv tau. Theem no siv cov khoom ua noj coniferous thiab cov ntoo tawv ua ke, nrog rau kev ua kom dawb ua ke tom qab ua noj. Hauv cov txheej txheem tsim khoom, cov qhov tsis zoo xws li cov pob zeb fiber tsis sib xws, cov pob zeb fiber ntxhib, thiab xim pulp tsis ruaj khov yog qhov tshwm sim.
3. Nias
Kev txhim kho cov txheej txheem pulping yog ib kauj ruam tseem ceeb rau kev ua kom cov ntawv kraft tawv dua. Feem ntau, kev ua kom cov pulp nruj dua thaum tswj nws cov porosity zoo thiab qis stiffness yog qhov tsim nyog los txhim kho cov ntawv tawv, ceev, thiab sib xws.
Daim ntawv Kraft muaj zog dua thiab muaj qhov yuam kev ntsuas tau hauv kev hloov pauv ntsug thiab sab. Yog li ntawd, cov pulp rau daim ntawv dav sib piv, cov ntxaij vab tshaus, thiab cov web formers siv los txhim kho qib. Txoj kev nias siv los ua daim ntawv cuam tshuam rau nws cov huab cua permeability, stiffness, thiab smoothness. Kev nias txo qhov porosity ntawm daim ntawv, txo nws cov permeability thiab vacuum thaum ua kom sealability; nws kuj tseem tuaj yeem ua rau lub zog ntawm daim ntawv.
Cov no yog cov hau kev uas daim ntawv kraft feem ntau ua.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-30-2022