Cov yam ntxwv ntawm daim ntawv molding txheej txheem yog qhia. Cov khoom siv molded yog ua los ntawm cov ntawv xov xwm pov tseg thiab cov ntawv thawv ntawv ua cov ntaub ntawv tseem ceeb, pulped nrog qee feem ntawm cov khoom ntxiv, lub cev qhuav dej thiab tsim los ntawm cov pwm tshwj xeeb, thiab tom qab ntawd qhuav, cua sov- kho, thiab zoo li tus. Txheej txheem luv-ntau. Daim ntawv molded khoom siv tau thiab degraded. Tom qab tau ntxiv rau cov txheej txheem tshwj xeeb, lawv muaj cov dej tsis zoo thiab cov roj- cov khoom pov thawj, tuaj yeem hloov cov khoom yas foamed, tuaj yeem tshem tawm "dawb paug", thiab muaj kev tiv thaiv ib puag ncig zoo.
Daim ntawv molded cov khoom yog ib puag ncig tus phooj ywg cov khoom pom zoo los ntawm lub ntiaj teb lub tuam tsev tiv thaiv ib puag ncig. Thaum lawv cov txheej txheem tsim khoom, lawv tseem ceeb heev rau kev tiv thaiv ib puag ncig. Hais txog qhov cuam tshuam ntawm peb qhov pov tseg ntawm kev tiv thaiv ib puag ncig, nyob rau hauv tag nrho cov txheej txheem ntau lawm, los ntawm kev siv cov ntaub ntawv tseem ceeb mus rau qhov kawg ntawm tag nrho cov txheej txheem ntau lawm txog tam sim no, nws cov kev paub txog ib puag ncig muaj zog heev. Cov khoom siv raw yog cov ntawv pov tseg, thiab cov tshuaj tiv thaiv lub cev tseem ceeb hauv kev tsim thiab ua cov txheej txheem, tsuas yog ib qho me me ntawm cov khoom siv tshuaj tau ntxiv los ua cov tshuaj tiv thaiv dej, thiab cov khoom siv tshuaj no yog txhua yam khaws cia hauv cov khoom tiav tom qab cov khoom qhuav, thiab tsis muaj paug tawm uas ua rau ib puag ncig. Kev ua qias tuaj: Cov dej siv hauv cov kab ntau lawm yog siv rau hauv lub voj voog kaw, tab sis cov dej vapor generated thaum cov khoom qhuav yog volatilized rau hauv qhov chaw, thiab tsis tas yuav ntxiv dej thaum lub sij hawm tsim khoom, yog li cov dej haus tsis loj.
2. Nqi kev lag luam
Tom qab ob peb xyoos ntawm txoj kev loj hlob thiab kev tsim kho tshiab ntawm daim ntawv pwm moulding tshuab, kev ua haujlwm ntawm cov cuab yeej tau raug txhim kho tas li, cov txheej txheem tsim tau maj mam matured, thiab cov nqi ntawm cov khoom tau raug tsav kom ruaj khov. Tam sim no, cov nqi tsim khoom ntawm cov khoom lag luam hauv tsev yog qhov zoo ib yam li cov khoom siv yas ua npuas ncauj, thiab cov nqi ntawm qee cov ntawv tais cov khoom lag luam yog qis dua li ntawm cov khoom yas ua npuas ncauj.
Kev hloov cov npuas yas poob siab- cov khoom pov thawj nrog cov ntawv txhawb nqa khoom yog ua tau raws li kev ua tau zoo thiab cov nqi tsim khoom. Ua ke nrog nws cov txiaj ntsig kev tiv thaiv ib puag ncig, nws tau dhau los ua ib qho kev tsis pom zoo rau cov ntawv molded khoom los hloov cov khoom siv yas yas.
Thib ob, cov txheej txheem pulping ntawm cov ntawv molded khoom
Siv cov ntawv nkauj nkauj xwb, cov ntawv pov tseg, thawv, thiab lwm yam raws li cov ntaub ntawv raw, los ntawm cov txheej txheem ntawm pulping thiab refining, daim ntawv yog hloov mus rau hauv fibers thiab tshem tawm hauv dej los ua ib daim ntawv pwm. Raws li cov yam ntxwv ntawm cov khoom yuav tsum tau ua, qhov ntev fiber ntau thiab daim ntawv pwm ceev tuaj yeem tswj tau raws li qhov xav tau ntawm cov khoom.
Ntxiv cov additives tshwj xeeb rau daim ntawv pwm tuaj yeem ua rau cov khoom tsis muaj dej thiab roj- pov thawj. Ntxiv cov pigments tsim nyog tuaj yeem ua rau cov khoom muaj ntau yam xim.
Peb cia siab tias kev qhia txog cov yam ntxwv ntawm cov ntawv pwm tshuab tau piav qhia saum toj no tuaj yeem pab koj. Cov phooj ywg uas xav paub ntau ntxiv txog daim ntawv pwm tuaj yeem hu thiab nias peb tus lej xov tooj hu rau peb, lossis ua raws li peb lub vev xaib kom paub ntau ntxiv Yog xav paub ntxiv txog daim ntawv pwm, cov phooj ywg uas xav yuav daim ntawv pwm tuaj yeem txais tos hu rau lub chaw pabcuam xovtooj rau kev sib tham. Peb tos ntsoov yuav koom tes nrog koj!
