Nrog rau kev ua raws li "txheej txheem yas" thiab kev txhim kho ntawm txhua tus neeg paub txog kev tiv thaiv ib puag ncig, tus nqi siv cov hnab yas tau txo qis heev, thiab txhua tus tau pib siv cov hnab tiv thaiv ib puag ncig lossis hnab ntawv.Raws li peb txhua tus paub, daim ntawv yog cov khoom siv uas tuaj yeem siv thiab rov siv dua.Cov khoom siv raw rau papermaking feem ntau yog cog fibers.Ntxiv rau peb lub ntsiab tseem ceeb ntawm cellulose, hemicellulose thiab lignin, muaj lwm yam khoom siv nrog cov ntsiab lus me me.Xws li cov resin, tshauv, thiab lwm yam. Cia peb tham txog qhov txawv ntawm daim ntawv hnab ntawv thiab kraft ntawv.
Ua ntej tshaj plaws, cov txheej txheem tsim cov ntawv hnab ntawv thiab kraft ntawv yog qhov zoo sib xws.Sack paper yog tsim los ntawm cov ntoo fiber ntau los ntawm softwood thiab kraft pulp.Txawm li cas los xij, qhov zoo ntawm cov ntawv hnab ntawv feem ntau qis dua li ntawm cov ntawv kraft, vim tias, txhawm rau txuag cov nqi tsim khoom, qee lub tuam txhab yuav ntxiv qee cov paj rwb stalk pulp, xyoob pulp, thiab lwm yam, thiab qee cov ntaub qhwv yuav muab ntxiv rau cov uas muaj kev ua haujlwm tsis zoo.Yog li ntawd, daim ntawv hnab ntawv Cov ntawv zoo tsis raug kho thiab muaj qhov hloov pauv loj.Nyob rau tib lub sijhawm, daim ntawv hnab ntawv muaj lub zog zoo dua qub, yog li nws feem ntau yog siv los ua lub hnab ntim khoom, feem ntau yog ntim cov cement, chiv, thiab lwm yam. Tsis tas li ntawd, tam sim no, ntim ntawm cov khoom feem ntau xav tau huab cua permeability, yog li huab cua permeability. ntawm daim ntawv lub hnab ntawv kuj tseem zoo.
Cov hom ntawv kraft muaj ntau dua, uas tuaj yeem paub qhov txawv ntawm cov xim, siv thiab cov khoom siv raw.Tsis tas li ntawd, lub zog ntawm kraft ntawv yog qhov loj, uas yog ib qho ntawm cov yam ntxwv tseem ceeb tshaj plaws uas paub qhov txawv ntawm lwm cov ntawv.Nyob rau tib lub sijhawm, kraft ntawv muaj zog heev thiab tuaj yeem siv los ntim qee cov khoom lag luam.Hais txog qib, kraft ntawv tuaj yeem muab faib ua peb qib: U, A thiab B3.Tsis tas li ntawd, cov khoom sib txawv muaj cov kev xav tau zoo sib txawv.Nyob rau tib lub sijhawm, qhov zoo sib txawv txhais tau tias cov nqi sib txawv, yog li cov tuam txhab yuav tsum ua lawv tus kheej xaiv.Tsis tas li ntawd, cov hnab ntawv ua los ntawm cov ntawv kraft feem ntau yog cov hnab ntawv me me, thiab qhov loj ntawm cov ntawv hnab ntawv tsis paub meej.
Nyob rau hauv luv luv, lub tswv yim ntawm cov yas txwv kev txiav txim tau txhawb txoj kev loj hlob ntawm kraft daim ntawv, thiab tam sim no cov neeg tab tom yuav kraft ntawv hnab, uas yog ib puag ncig tus phooj ywg thiab yuav siv tau rau lub sij hawm ntev, ua ib tug tej yam kev pab rau kev pab thiab ib puag ncig tiv thaiv.Yog li ntawd, kev siv cov hnab ntawv kraft tau tawm tswv yim.Kraft daim ntawv hnab muaj zog, ruaj, zoo nkauj thiab ib puag ncig zoo.
Post lub sij hawm: Sep-27-2023