Bakelite inonzi phenolic resin.Phenolic resin (PF) imhando yemaindasitiri epurasitiki zvigadzirwa.Izvo zvigadzirwa zvephenolic resin kugadzirwa zvinonyanya phenol uye aldehyde, uye phenol uye formaldehyde inowanzoshandiswa.Iwo ari polymerized ne condensation reaction pasi pe catalysis yeasidhi, base uye zvimwe zvinokonzeresa.Kune marudzi maviri ekugadzirwa kwemaindasitiri: yakaoma process uye wet process.
Pasi pekuita kwezvakasiyana zvinokonzeresa, phenol nealdehyde zvinogona kuburitsa marudzi maviri ephenolic resins: imwe inonzi thermoplastic phenolic resin, imwe yacho thermosetting phenolic resin.Iyo yekutanga inogona kurapwa kuita block chimiro nekuwedzera kurapa mumiririri uye kupisa, nepo iyo yekupedzisira inogona kuporeswa kuita block chimiro nekudziya pasina kuwedzera kurapa mumiririri.
Thermoplastic phenolic resin uye thermosetting phenolic resin inogona chete kushandiswa kuburikidza nekuchinjana network inoumbwa nekurapa.Iyo nzira yekurapa ndeyekuenderera kwechimiro polycondensation uye kuumbwa kwezvigadzirwa zvemaumbirwo.Iyi nzira yakasiyana nekunyunguduka uye kurapwa kwe general thermoplastics.Zvose zvemuviri nemakemikari maitiro hazvidzokeri shure.
Phenolic resin inogona kuumbwa nenzira yakafanana neye thermoplastic.PF yekugadzira jekiseniinoda kuyerera kwakanaka, inogona kuumbwa pasi pekushomeka kwejekiseni, kuomarara kwemafuta, kukurumidza kuomesa kukurumidza, kupenya kwakanaka kwepasi kwezvikamu zvepurasitiki, kudhirowa kuri nyore, uye pasina kusvibiswa kwekuumbwa.Zvisinei, jekiseni molding inewo zvayakaipira.Semuenzaniso, iyo yakanyungudutswa inogumira nemhando yekuzadza, saka haina kukodzera kushandisa mamwe ekuisa kuumba zvikamu zvepurasitiki.Nhamba huru yemagedhi nematanho haigone kushandiswazve mushure mekurapa, uye inogona kuraswa chete.
Mushoko, thermoplastic phenolic resin inogona kugadzirwa neyakajairwa jekiseni rekuumba muchina, asi mamiriro ekuita anodzorwa zvakanyanya.Thermosetting phenolic resin inofanirwa kugadzirwa neakakosha jekiseni rekuumba muchina we phenolic resin, uye mold inotorawo yakasarudzika dhizaini.
Inoshandiswa zvakanyanya muzvigadzirwa zvemagetsi, zvigadziko, zvigadziko zvemwenje;sandwich machine shells, nezvimwewo;Nekudaro, kuita kwayo kusasimba uye kunetsa kudzvanya maitiro kunogona kudzikisira kukura kwayo.Nekubuda kwemamwe mapurasitiki, zvigadzirwa zvebakelite hazvisi nyore kuona izvozvi.Kunyangwe zvigadzirwa zvebakelite zvinoda kudziirwa pakuumbwa, nguva yekugadzira yakareba kupfuura iyo yemapurasitiki akajairwa, uye kupfeka mold kwakakura, izvo zvinoda zvakakwirira zvinodiwa zvesimbi, asi nekuda kwechinzvimbo chayo chinobatsira mumutengo wezvigadzirwa, zviri. zvichiri kutsiva zvikamu zvepurasitiki zvakawanda.
Nguva yekutumira: Jul-15-2022