Nyob rau hauv lub arsenal ntawm tam sim no hluas nkauj muaj ntau lub tswv yim uas muab appreciable zoo dua nyob rau hauv cov chav kawm ntawm ua noj los yog nyob rau ntawm cov khoom. Zaub mov ntawv yog ib qho ntawm ntau yam "pabcuam".
Daim ntawv noj mov yog dab tsi?
Khoom noj khoom haus yog ib cov khoom ua los ntawm cov hluavtaws ntawm ntuj - cellulose. Vim li no, tsis muaj kev txhawj xeeb, xws li ntawv yuav siv tau rau ntim cov khoom noj khoom haus, tshwj xeeb yog ci, roj , nqaij cov khoom tiav lossis cov khoom siv curd rau kev tso rau hauv lub tub yees lossis lub taub yees. Nws tseem hu ua parchment.
Hauv kev nyiam siv ntawv rau khoom noj khoom haus hais qhov zoo ntawm cov khoom no, uas yog:
- kev thaj yeeb nyab xeeb thiab tsis muaj kuab lom;
- noo noo, roj thiab airtightness;
- lub zog.
Yog li, cov ntawv ua zaub mov pub zaub mov pub rau cov "ua pa", tab sis tsis muaj evaporation ntawm ya raws thiab cua. Tsis tas li ntawd, cov khoom noj nyob hauv parchment tsis tau txais tej yam tsis zoo los yog tsw tsw. Dab tsi yog tsis zoo li cov zaub mov nrov hnub no? Tsis tas li ntawd, cov ntawv noj mov yog pheej yig dua. Los ntawm txoj kev, rau cia rau hauv pob nws nws yooj yim los sau, piv txwv li, pib hnub ntawm cia.
Tsis tas li ntawd, ntawv tais diav, los yog khub dej, yuav siv tau los ua ib qho txheej txheem tiv thaiv kab noj lossis cov ntawv ci. Cov khoom cua kub uas tiv taus kub hnyav tau kub siab txog 230 degrees hauv qhov cub, thaum ntxuav cov ntaub ntawv yooj yim dua.
Hom zaub mov ntawv zoo li cas?
Niaj hnub no, kev lag luam muaj ntau yam khoom plig. Daim ntawv qhwv noj zaub mov txawv li ntawm qhov ceev. Ntawm kev muag khoom muaj cov khoom nrog qhov ntsuas ntawm 40 mus rau 200 g / m & sup2. Qhov ntau dua qhov ntom ntawm parchment, lub siab dua tus nqi ntawm lub yob.
Rau industrial purposes, cov ntawv noj mov ntxiv nrog kho sulfuric acid los txhim kho lub zog. Qhov tshwj xeeb tshaj yog rau cov khoom ci ci ua ke nrog silicone impregnation yog ua. Ua ntej yuav ci, daim ntawv no tsis tas yuav tsum tau roj kom tsis txhob kub.