Yam Tseem Ceeb Kev Nyab Xeeb
Phenolic resins yog tsim los ntawm polycondensation ntawm phenol thiab formaldehyde. Cov khoom tiav lawm tej zaum yuav muaj cov tshuaj lom neeg seem -xws li phenol dawb thiab dawb aniline- uas ua rau muaj kev pheej hmoo ntawm kev tsiv teb tsaws rau hauv cov zaub mov thaum tiv tauj thaum kub kub.
Lub sijhawm ntev - noj phenol tuaj yeem ua rau lub siab thiab lub raum tsis ua haujlwm, thaum aniline raug cais raws li Pawg 3 muaj peev xwm carcinogen; Cov kev txwv kev nyab xeeb nruj siv rau qib kev tsiv teb tsaws ntawm ob yam khoom.
Nrog rau qee cov khoom lag luam phenolic tsis zoo, kev tso tawm cov khoom tsis zoo tuaj yeem ua rau muaj kev nyab xeeb ntau dua thaum raug kub lossis cov khoom noj acidic / oily, ua rau muaj kev phom sij rau kev noj qab haus huv.
Ua raws li lwm txoj kev
Melamine-formaldehyde resin (melamine resin) yog ib qho thermosetting resin haum rau kev tsim khoom siv rooj. Nws muaj cov dej zoo heev thiab muaj kev cuam tshuam, tsis yog - tshuaj lom nyob rau hauv kev siv ib txwm siv, ua tau raws li cov qauv kev nyab xeeb rau zaub mov-cov ntaub ntawv tiv tauj, thiab tam sim no yog cov khoom siv raw khoom siv rau "imitation porcelain" tableware.
Nws yuav tsum raug sau tseg tias qee qhov chaw yuam kev hais tias "melamine tseem hu ua phenolic resin"; Qhov no yog ib qho kev ua yuam kev, vim tias ob qho tib si sib txawv ntawm cov resins thiab tsis tuaj yeem sib npaug.