Chii chinonzi PFA?
Zita rechirungu rePFAiri: Polyfluoroalkoxy, zita rechiChinese nderokuti: tetrafluoroethylene - perfluorinated alkoxy vinyl ether copolymer (inozivikanwawo se: perfluorinated alkylates, soluble polytetrafluoroethylene)PFAresin ichangobva kunyunguduka-inogadziriswa fluoroplastics, PFA, FEP, PTFE kemikari zvivakwa zvakafanana, asi FEP inogona kungoshandiswa pazasi 200 madhigirii, PTFE haigone kubaiwa.
1, Yakananga giravhiti: 2.13-2.167g/cm3
2, Molding shrinkage: 3.1-7.7%
3, Molding tembiricha: 350-400℃
4, Nzvimbo yakanyungudika yePFA inenge 580F uye density i2.13- 2.16g/cc (g/cm3).
Hunhu uye mashandisiro makuru ePFA
PFA inowanzonzi fusible PTFE, uye midziyo yayo yakasiyana-siyana ndiyo yepamusoro yefluoroplastics, uye kushandiswa kwayo kwakafanana neFEP.Inoshandiswa zvakanyanya muindasitiri ye semiconductor, pamwe nekurapa, makemikari uye anti-corrosion, mota uye mamwe minda.
PFA inowanikwa mune pellet fomu yekuumba uye extrusion, fomu yehupfu yekutenderedza kuumbwa uye kupfekedza, uye mune semi-yakapedzwa zvigadzirwa senge mafirimu, mashizha, tsvimbo uye tubing.Marezeni ePFA akagoverwa mumusika wekuUS ndeemhando yeTeflon kubva kuDUPOut, Neoflon brand kubva kuDaikin, Hthen brand yekuAnsimont, uye Hostafl brand kubva kuHOechst Celanese.
1, Iko kushandiswa kukuru kwePFA.
①.Inokodzera kugadzirwa kwezvikamu zvinodzivirira corrosion, zvikamu zvisingapfeke, zvisimbiso, zvisimbiso zvekudzivirira uye zvikamu zvemidziyo yekurapa.
②.Yakakwira tembiricha waya uye tambo yekuvharisa, anti-corrosion midziyo, yekuisa chisimbiso, pombi nemavharuvhu bushings, uye midziyo yemakemikari.
2, Kugadzira kuita
①.Crystalline zvinhu, kunyura kudiki kunyorova.Inogona kugadziriswa kuita zvigadzirwa neyakajairwa thermoplastic kugadzirisa nzira.
②.Kusafamba zvakanaka, kuri nyore kwazvo kuora, kuora kunoburitsa gasi rinoparadza.Iyo tembiricha yekuumba haifanirwe kudarika 475 madhigirii, mold inofanira kupisa kusvika 150-200 madhigirii, uye iyo yekudurura system inofanirwa kuve nekushomeka kushoma pakuyerera kwezvinhu.
③.Translucent granules, jekiseni uye extrusion molding.Molding tembiricha 350-400 madhigirii, pamusoro 475 madhigirii zviri nyore kukonzera discoloration kana mabhuru.Uye cherechedza kuti zvichava zvakanyanya kuoma kugadzira.
④.Nekuti iyo yakanyungudutswa inokanganisa simbi, kugadzirwa kwenguva refu, mold inoda kurapwa kwechromium plating.
Kuita kwezvinhu
1, PFA icopolymer yehuwandu hudiki hweperfluoropropyl perfluorovinyl ether uye polytetrafluoroethylene.Kunyunguduka kusungirirwa kunowedzerwa, viscosity yemhinduro inoderedzwa, nepo kushanda kusina kuchinjwa kana kuenzaniswa nePTFE.Iyi resin inogona kugadziriswa zvakananga kuita zvigadzirwa neyakajairwa thermoplastic molding nzira.
2, tembiricha yekushandiswa kwenguva refu - 80 - 260 madhigirii, ine yakanakisa makemikari kuramba, corrosion kuramba kune ese makemikari, iyo yakaderera coefficient yekupokana mupurasitiki, kune yakanaka kwazvo magetsi emagetsi, ayo emagetsi ekudzivirira haakanganiswa nekupisa, "mambo wepurasitiki" akadana.
3, makemikari ayo anopikisa uye PTFE yakafanana, iri nani pane vinylidene fluoride.
4, kutsika kwayo kuramba uye simba rekumanikidza zviri nani pane PTFE, yakakwira kusimba simba, kurebesa kusvika ku100-300%.Yakanaka dielectric zvivakwa, yakanakisa radiation kuramba.
5, Isiri-chepfu: physiologically inert, inogona kuiswa mumuviri wemunhu.
Nguva yekutumira: Nov-18-2022