1. Cov khoom siv raw
1.1 Khoom siv-Bakelite
Bakelite lub npe tshuaj yog phenolic yas, uas yog thawj hom yas muab tso rau hauv kev lag luam ntau lawm.Nws muaj zog txhua yam, zoo rwb thaiv tsev, kub tsis kam thiab corrosion kuj, yog li nws yog feem ntau siv nyob rau hauv cov khoom siv hluav taws xob, xws li keyboards, teeb tuav, earphones, xov tooj casings, instrument casings, thiab lwm yam.Nws qhov tshwm sim yog qhov tseem ceeb heev rau kev tsim kho kev lag luam.
1.2 Txoj kev Bakelite
Phenolic thiab aldehyde tebchaw tuaj yeem ua rau hauv phenolic resin los ntawm condensation cov tshuaj tiv thaiv nyob rau hauv qhov kev txiav txim ntawm acidic los yog yooj yim catalyst.Sib tov phenolic resin nrog sawn ntoo hmoov, talcum hmoov (filler), urotropine (kho tus neeg sawv cev), stearic acid (lubricant), pigment, thiab lwm yam, thiab cua sov thiab sib tov nyob rau hauv ib tug tov khoom kom tau Bakelite hmoov.Bakelite hmoov yog rhuab thiab nias rau hauv pwm kom tau ib qho thermosetting phenolic yas khoom.
2. Cov yam ntxwv ntawm bakelite
Cov yam ntxwv ntawm bakelite yog tsis absorbent, tsis yog-conductive, kub tsis kam thiab siab zog.Nws feem ntau siv hauv cov khoom siv hluav taws xob, yog li nws hu ua "bakelite".Bakelite yog ua los ntawm hmoov phenolic resin, uas yog tov nrog sawdust, asbestos los yog Taoshi, thiab ces nias tawm nyob rau hauv ib tug pwm ntawm kub kub.Ntawm lawv, phenolic resin yog thawj cov khoom siv hluavtaws hauv ntiaj teb.
Phenolic yas (bakelite): qhov saum npoo yog tawv, nkig thiab tawg.Muaj lub suab ntawm ntoo thaum khob.Nws yog feem ntau opaque thiab tsaus nti (xim av los yog dub).Nws tsis yog mos hauv dej kub.Nws yog ib qho insulator, thiab nws cov khoom tseem ceeb yog phenolic resin.
Post lub sij hawm: Lub Xya hli ntuj-13-2021