Koj puas paub cov lus zais ntawm Eraser?
Eraser yog ib hom ntawv sau uas txhua tus paub txog. Thaum peb tseem hluas thiab sau ib lo lus yuam kev nrog xaum, peb tsuas yog rub nws nrog roj hmab, ces sau nws kom raug. Koj puas paub vim li cas nws thiaj li tshem tau cov cwj mem?
Vim li cas thiaj tuaj yeem tshem tawm cov cwj mem?
Thaum siv cov cwj mem, cov hmoov txhuas rub rau ntawm daim ntawv, cov hmoov zoo graphite yuav npog cov qhov tsis pom kev ntawm daim ntawv, tawm hauv cov cim grey tsaus rau ntawm daim ntawv. Cov erasers muaj qee qhov yooj. Thaum cov erasers rub rau ntawm daim ntawv, cov roj hmab tuaj yeem nkag mus tob rau hauv cov fiber ntau ntawm daim ntawv, thiab tshem tawm cov graphite rau ntawm qhov chaw. Nyob rau tib lub sijhawm, daim ntawv yuav ua kom huv dua.
Thaum sau ntawv nrog tus cwj mem, tus cwj mem yuav nkag mus rau hauv fiber ntau txheej txheej ntawm daim ntawv, yog li nws tsis tuaj yeem muab tshem tawm nrog lub lwv.
Lub eraser yog dab tsi?
Muaj peb kauj ruam hauv kev ua cov eraser thaum ntxov:
01
Roj refineries xa hmoov los yog kua hluavtaws roj hmab mus rau cov roj hmab factories. Yog tias yuav siv cov roj hmab ntuj, cov roj hmab uas muaj zog thiab loj yuav tsum tau crushed thiab yaj.
02
Sib tov roj hmab nrog av pumice hmoov, hlau oxide, zaub roj, sulfur thiab lwm yam khoom.
03
Cov cua sov sib xyaw kom sib xyaw cov sulfur nrog cov roj hmab, uas ua rau kom muaj zog ntawm cov roj hmab thiab ua rau nws ruaj khov dua. Qhov no yog thawj txheej txheem ntawm kev ua cov lwv.
Nyob rau hauv xyoo tas los no, vim nws zoo heev erasing kev ua tau zoo thiab siv tau yooj yim, yas erasers ua los ntawm polyvinyl chloride (PVC) raws li lub ntsiab raw khoom tau dhau los ua cov khoom tseem ceeb.
Cov mis ntawm cov roj hmab yas feem ntau yog ua los ntawm polyvinyl chloride (PVC) thiab cov neeg ua haujlwm sib xyaw (plasticizer, muab tub lim, stabilizer, kev pab cuam, thiab lwm yam). Lub plasticizer feem ntau siv phthalate esters, cov muab tub lim feem ntau yog siv calcium carbonate, titanium dioxide, thiab lwm yam., lub stabilizer tsuas yog siv stearate, cov kev pab cuam feem ntau muaj xws li lubricants, thiab lwm yam khoom siv muaj xws li colorants thiab flavors.
Hauv cov qauv tsim, cov khoom siv lub cev ntawm PVC tau hloov pauv zoo heev los ntawm kev sib koom tes ntawm PVC thiab lwm yam ntaub ntawv, thiaj li ua kom cov lwv tau raws li qhov yuav tsum tau ua.
Puas muaj lwm yam kev siv rau kev tshem tawm?
Eraser tuaj yeem siv tsis tau tsuas yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau tshem cov cwj mem kuj tseem siv tau rau lwm lub hom phiaj xws li kho cov cuab yeej, thiab daws qhov tsis zoo ntawm cov cuab yeej cuab yeej cuab yeej nrog lub rooj tsavxwm ntsaws. Lub eraser tuaj yeem so lub interface hlau ntawm lub rooj tsav xwm hauv Circuit Court, tooj liab ntawv stain thiab oxide zaj duab xis ntawm lub interface. Thiab lub qhov hluav taws xob hluav taws xob hluav taws xob kuj tuaj yeem tiv thaiv kom tsis txhob muaj kev puas tsuaj.
