Cov kev xav tau zoo ntawm fiberboard manufacturing feem ntau txiav txim siab raws li cov khoom lag luam, cov txheej txheem tsim khoom thiab cov khoom siv.Raws li qhov muaj txiaj ntsig zoo ntawm fiber ntau, cov fibers sib cais yuav tsum muaj qee qhov chaw ntawm qhov chaw thiab cov khoom sib cuam tshuam zoo, thiab xav tau ib qho piv txwv, tus nqi sieve, thiab cov kua dej fiber ntau, huab cua permeability, tshuaj lom neeg, thiab fiber ntau polymerization.Muaj cov kev cai nruj.Xws li cov khoom ntub dej, nyob rau hauv cov txheej txheem ntawm slab tsim thiab kub nias, fiber ntau slab yuav tsum muaj kev ua haujlwm ntawm lub cev qhuav dej sai thiab yooj yim.Cov qhuav qhuav yuav tsum tsis tsuas yog zoo tagnrho interweaving ntawm fibers, tab sis kuj zoo huab cua permeability ntawm lub slab.Txwv tsis pub, cov slabs tsim ntawm ob txoj kev tsim khoom yuav rhuav tshem cov qauv ntawm cov slabs thiab cuam tshuam rau qhov zoo ntawm cov khoom thaum thauj thiab kub nias.Txawm li cas los xij, thaum tsim cov khoom siv qis los yog mos fiberboard, cov fiber ntau yuav tsis raug nias ua ntej lossis maj mam nias kom qhuav rau hauv lub rooj tsavxwm tom qab tsim cov slab.Lub degree ntawm brooming nce qhov interweaving thiab kev sib cuag cheeb tsam ntawm cov fibers lawv tus kheej.
(1) Kev sib raug zoo ntawm fiber ntau morphology thiab cov khoom zoo
Raws li qhov muaj txiaj ntsig zoo ntawm fiber ntau muaj kev txhawj xeeb, muaj qhov sib txawv ntawm cov khoom sib txawv.Piv txwv li, qhov nruab nrab ntev ntawm fiber ntau tracheids ntawm coniferous ntoo yog 2-3 hli, thiab nam piv yog 63-110;qhov nruab nrab ntev ntawm fiber ntau tracheids thiab tawv ntoo fibers ntawm broad-leaved ntoo yog 0.8-1.3 hli, thiab nam piv yog 35-110 58;Raws li rau cov nyom fiber ntau raw cov ntaub ntawv, qhov nruab nrab ntev ntawm fiber ntau tracheids tsuas yog 0.8-2.2 hli, nam piv yog 30-130, thiab cov ntsiab lus ntawm cov tsis-fiber hlwb yog kuj siab.
Los ntawm kev xav ntawm fiber ntau ntev thiab nam piv, nws zoo nkaus li tias fiberboard ua los ntawm softwood fibers zoo dua.Txawm li cas los xij, nws tau raug pov thawj tias qhov kev ua tau zoo ntawm fiberboard nias los ntawm tag nrho cov ntaub ntawv coniferous tsis tas yuav yog qhov zoo tshaj plaws.Qhov no yog vim lub thickness ntawm cov fiber tracheids ntawm coniferous cov ntaub ntawv yog tubular, thiab lub thickness ntawm lub cell phab ntsa yog kuj loj dua qhov dav ntawm fibers.Tag nrho cheeb tsam kev sib cuag yuav tsawg dua.Ntawm qhov tsis sib xws, cov fibers tracheids, tawv ntoo fibers, thiab conduits ntawm broad-leaved ntoo yog nyias-walled thiab band-puab, yog li ntawd lub cheeb tsam ntawm fibers yog loj, thiab interweaving khoom yog zoo.Fiberboard cov khoom uas muaj siab ceev thiab lub zog.
Lub zog ntawm cov fibers nws tus kheej kuj muaj qee yam cuam tshuam rau lub zog ntawm cov khoom fiberboard.Ib tug neeg ib zaug siv txoj kev dyeing kom dhau qhov khoov thiab tensile tsis ua hauj lwm kev ntsuam xyuas ntawm lub hard fiberboard, thiab soj ntsuam nyob rau hauv lub microscope, nws tau pom tias 60% mus rau 70% ntawm ib fibers puas lawm.Los ntawm qhov xaus ntawm qhov kev ntsuam xyuas, nws ntseeg tau hais tias lub zog ntawm cov monomer fiber nws tus kheej yuav luag tsis muaj kev cuam tshuam rau lub zog ntawm cov mos fiberboard nrog ib tug ceev ntawm 0.25-0.4g / cm3.Nws muaj qhov pom tseeb dua ntawm lub zog ntawm nruab nrab ntom ntom fiberboard nrog qhov ntom ntawm 0.4-0.8g / cm3.Nws yuav muaj kev cuam tshuam ntau dua rau lub zog ntawm high-density fiberboards nrog qhov ceev ntau dua 0.9g / cm3.Qhov no yog vim lub cev muaj zog ntawm ib leeg fiber ntau nws tus kheej muaj feem xyuam rau qhov nruab nrab ntev ntawm cellulose saw (uas yog, qib ntawm polymerization), thiab qhov tawg ntev ntawm ib fiber ntau tuaj yeem ncav cuag 40000Pm.Tom qab cov fibers tau pav thiab tsim rau hauv cov slabs, cov txheej txheem tsis tu ncua yog nyob rau hauv lub xeev ntawm kev tawg thiab tsis xwm yeem.Tom qab tshem tawm cov kev cuam tshuam ntawm lwm yam, xav tias qhov nruab nrab tawg ntev ntawm ib leeg fiber ntau yog 20 000 Pm, thiab tom qab ntawd xam raws li tus naj npawb ntawm conservative ntawm 40%, ib qho fiber ntau Qhov ntev ntawm qhov tawg tuaj yeem ncav cuag 8 000 Pm.Nws tuaj yeem pom tau tias kev sib raug zoo ntawm lub cev muaj zog ntawm fiber ntau nws tus kheej thiab lub zog ntawm cov khoom fiberboard.
(2) Kev sib raug zoo ntawm qib ntawm fiber ntau sib cais thiab qhov zoo ntawm fiberboard
Qib ntawm fiber ntau sib cais yog hais txog qib ntawm fiber ntau sib cais tom qab defibration, uas yog ib qho nam uas tsis ncaj qha cuam tshuam qhov zoo ntawm fibers.Qhov zoo dua qhov sib cais ntawm fiber ntau, qhov loj dua qhov chaw ntawm fiber ntau, thiab cov dej ntws tsis zoo thiab huab cua permeability ntawm fiber ntau.Hloov pauv, qhov zoo dua cov dej pom thiab huab cua permeability ntawm fiber ntau, tab sis cov fiber ntau nyob rau lub sij hawm no feem ntau thicker thiab qhov tshwj xeeb nto ntawm cov fiber ntau yog me me.Tom qab kev sib cais fiber ntau, qhov tshwj xeeb ntawm qhov chaw ntawm fiber ntau inversely proportional rau cov dej ntws.Qhov loj dua qhov tshwj xeeb ntawm thaj chaw yog, cov fibers zoo dua, thiab cov dej ntws ntawm fiber ntau yog qhov phem dua.Tsis zoo fiber ntau sib cais degree Coarse fiber (28 ~ 48 mesh) muaj huab cua me me, thaum muaj fiber ntau sib cais degree thiab zoo fiber ntau muaj qhov loj ntawm thaj tsam (100 ~ 200 mesh), huab cua permeability ntawm fiber ntau, zoo slab filling, tab sis huab cua loj. tsis kam.Qhov loj dua qhov chaw tshwj xeeb ntawm cov fiber ntau, qhov me me ntawm cov fiber ntau, thiab rov ua dua.Yog li nws tuaj yeem txiav txim siab tias qhov filterability, huab cua permeability thiab ntim ntawm fiber ntau muaj ib qho kev sib raug zoo nrog rau qib ntawm kev sib cais ntawm cov fiber.Yog li ntawd, nws tuaj yeem hais tau tias qhov kev sib cais ntawm fiber ntau yog qhov tseem ceeb ntawm qhov zoo ntawm fiber ntau pulp, uas cuam tshuam ncaj qha rau cov txheej txheem fiber ntau thiab cov khoom zoo.Kev xyaum kuj tau ua pov thawj tias nyob rau hauv ib qho kev sib txawv, qhov siab dua qhov kev sib cais ntawm fiber ntau, uas yog, qhov zoo dua cov fibers, qhov zoo dua qhov kev sib tshuam ntawm cov fibers ntawm cov slab, thiab lub zog, dej tsis kam thiab cov khoom ntom ntawm fiberboard yuav. kuj nce raws li.
Tsis tas li ntawd, nws tau xaus lus los ntawm cov kev paub dhau los uas cov degree ntawm fiber ntau sib cais yuav tsum tau tswj nyob rau hauv ib tug tej yam ntau yam nyob rau hauv lub hauv paus ntawm stabilizing cov khoom zoo raws li ntau yam ntawm cov khoom thiab cov txheej txheem cov yam ntxwv.
(3) Kev sib raug zoo ntawm fiber ntau kuaj tus nqi thiab fiberboard zoo
Cov duab fiber ntau, fiber ntau ntev, thiab fiber ntau thickness piv ntawm ntau hom fiber ntau raw cov ntaub ntawv yuav muaj ntau yam cuam tshuam rau qhov zoo ntawm fiberboard.Txoj kev kuaj fiber ntau zoo feem ntau yog siv fiber ntau sib cais (fiber freeness DS thiab fiber percussion degree SR).Vim tias fiber ntau nws tus kheej txawv heev, nws feem ntau nyuaj rau kev cuam tshuam cov ntsiab lus ntawm fiber ntau zoo los ntawm kev ntsuas qhov degree ntawm kev sib cais ntawm fibers ib leeg.Qee lub sij hawm qhov kev ywj pheej ntawm ob fibers yog qhov zoo sib xws, tab sis qhov ntev thiab tuab ntawm cov fibers txawv.Yog li ntawd, nws yog supplemented los ntawm kev sim cov fiber sieving tus nqi los soj ntsuam qhov zoo ntawm cov fibers sib cais.
Tus nqi ntsuas fiber ntau yog qhov tseem ceeb hauv kev tsim khoom tiag tiag.Kho cov fiber ntau slurry ntsuam xyuas tus nqi tuaj yeem txhim kho cov duab fiber ntau thiab slurry zog, yog li txhim kho cov khoom fiberboard zoo.Kev tshawb fawb txog cov txiaj ntsig ntawm kev tshuaj xyuas fiber ntau ntawm qhov zoo ntawm fiberboard tau ntev tau them nyiaj rau, thiab cov txheej txheem tsis tu ncua tau txais.Cov fiber ntau morphology feem ntau cuam tshuam los ntawm cov khoom siv thiab txoj kev sib cais fiber ntau.Cov ntoo coniferous zoo dua li cov ntoo dav dav.Cov txheej txheem tshuaj lom neeg zoo dua li cov txheej txheem cua sov (uas yog, txoj kev sib tsoo thermal), thiab cov txheej txheem siv tshuab ntshiab yog qhov zoo dua.pluag.
Dongguan MUAWoodworking Co., Ltd.yog ib tug Suav suab-absorbing tsev cov ntaub ntawv chaw tsim tshuaj paus thiab tsum.Thovtiv tauj pebyog xav paub ntxiv!
Post lub sij hawm: Lub Xya hli ntuj-22-2023
