PTFE ndiye pulasitiki yolimba kwambiri yomwe imadziwika pano.Amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana okhala ndi malo ovuta.Chifukwa cha ntchito yake yabwino, pang'onopang'ono yakhala chinthu chodziwika bwino muzinthu zapulasitiki (zonse zimatchedwa Polytetrafluoroethylene).Choncho, palinso opanga ambiri omwe akupanga zinthu zoterezi.PTFE zikhoza kupangidwa mu mitundu yambiri ya mankhwala, monga machubu, ndodo, mbale, gaskets, mafilimu, etc., amene ntchito m'madera osiyanasiyana.
Kodi chubu la PTFE ndi chiyani?
Polytetrafluoroethylene (yofupikitsidwa monga PTFE), yomwe imadziwika kuti "Plastic King", ndi polima yapamwamba kwambiri yomwe imapezedwa ndi polymerizing tetrafluoroethylene ngati monomer, yomwe imakhala yoyera kapena yowoneka bwino.Nkhaniyi ilibe inki kapena zina, ndipo ali ndi makhalidwe a asidi ndi alkali kukana, kukana zosiyanasiyana zosungunulira organic, ndipo pafupifupi insoluble mu zosungunulira zonse.Komanso, PTFE ali osiyanasiyana kutentha osiyanasiyana ndipo angagwiritsidwe ntchito kwa nthawi yaitali pa -65 ° C ~ 260 ° C pansi mavuto yachibadwa.Amapangidwa ndi phala extrusion njira.Machubu a PTFE opangidwa pogwiritsa ntchito phala extrusion amatha kusintha ndipo amatha kupanga machubu a PTFE okhala ndi mainchesi amkati ang'onoang'ono ngati 0.3 mm mpaka 100 mm ndipo makulidwe a khoma kukhala ang'onoang'ono ngati 0.1 mm mpaka 2 mm.Chifukwa chake, polytetrafluoroethylene (PTFE) chubu ndi chinthu chosunthika kwambiri chomwe chimapereka ntchito zambiri m'mafakitale osiyanasiyana.
Chifukwa chiyani machubu a PTFE amagwiritsidwa ntchito kwambiri:
1. Kukana kutentha kwakukulu, kosasungunuka mu zosungunulira zilizonse.Imatha kupirira kutentha kwambiri mpaka 300 ° C munthawi yochepa, ndipo imatha kugwiritsidwa ntchito mosalekeza pakati pa 200 ° C ndi 260 ° C, ndikukhazikika kwamafuta.
2. Low kutentha kukana, wabwino makina kulimba pa kutentha otsika, ngakhale kutentha akutsikira -65 ℃, izo sizidzakhala embrittled, ndipo akhoza kusunga 5% elongation.
3. Kusamva dzimbiri, kusakhala ndi mankhwala ambiri ndi zosungunulira, kugonjetsedwa ndi asidi amphamvu ndi alkalis, madzi ndi zosungunulira zosiyanasiyana za organic, zimatha kuteteza ziwalo zamtundu uliwonse wa dzimbiri.
4. Anti-kukalamba, pansi pa katundu wambiri, ali ndi ubwino wapawiri wa kukana kuvala ndi kusamata.Moyo wokalamba wabwino kwambiri mumapulasitiki.
5. Mafuta okwera kwambiri, otsika kwambiri amakangana pakati pa zinthu zolimba.Coefficient of friction imasintha pamene katundu akuyenda, koma mtengo wake ndi pakati pa 0.05-0.15.Choncho, ali ndi ubwino otsika kuyambira kukana ndi ntchito yosalala kupanga fani.
6. Kusamatira ndiko kugwedezeka kwazing'ono kwambiri kwa zinthu zolimba, ndipo sikumamatira kuzinthu zilizonse.Pafupifupi zinthu zonse sizimamatira kwa izo.Mafilimu oonda kwambiri amasonyezanso zinthu zabwino zopanda ndodo.
7. Ndiwopanda fungo, wosakoma, wosakhala ndi poizoni, physiologically inert, ndipo alibe zotsatira zoipa pamene aikidwa m'thupi monga mitsempha yamagazi ndi ziwalo zopangira kwa nthawi yaitali.
8. Wopepuka komanso wosinthika.Kuchepetsa kwambiri mphamvu ya wogwiritsa ntchito.
Zina zomwe zimagwiritsidwa ntchito pamachubu a PTFE:
1. Chemical Viwanda
Chifukwa cha kukana kwawo kwamankhwala ambiri pafupifupi mankhwala onse, machubu a PTFE ndi abwino kuti agwiritsidwe ntchito pamakampani opanga mankhwala.Izi zikuphatikizapo makampani a semiconductor.Njira zamakono zopangira semiconductor zimafunikira kuwerengera kotetezeka komanso kunyamula zakumwa zowononga (ma acid ndi maziko).Izi zitha kuwononga kwambiri chubu choperekera pakanthawi kochepa.
2. Makampani opanga magalimoto
Mu injini yamagalimoto, machubu apamwamba kwambiri opangidwa ndi PTFE amagwiritsidwa ntchito potulutsa mafuta komanso njanji zamafuta.Monga mapaipi amafuta, mapaipi a turbocharger, ma hose oziziritsa, ma hose amabuleki odziwikiratu, payipi zamoto wama brake, ma hose a injini ya dizilo, mapaipi othamangira ndi ziwongolero zamphamvu.Makhalidwe a kutentha kwakukulu ndi kukana kutentha kwapansi, kukana kwamphamvu, kukana kuvala ndi kukana kwa dzimbiri kwa chubu la PTFE kumapangitsa kuti ikhale ndi moyo wautali wautumiki popanda kusinthidwa pafupipafupi.
3. Makampani osindikizira a 3D
Mu kusindikiza kwa 3D, filament iyenera kusamutsidwa ku mphuno yosindikizira, yomwe iyenera kuchitidwa pamtunda wotentha kwambiri.Machubu a PTFE ndiye polima yomwe imakonda kwambiri pamakampani osindikizira a 3D chifukwa cha kutentha kwake komanso zinthu zopanda ndodo, zomwe zimathandiza kutsitsa zinthu mosavuta kuchokera kumphuno.
4.Medical industry
Zapadera za machubu a PTFE amaphatikizanso mawonekedwe osavuta kuyeretsa pamwamba.M'zaka khumi zapitazi, machubu a PTFE akhala akugwiritsidwa ntchito kwambiri pazida zamankhwala.Chifukwa otsika coefficient wa mikangano PTFE machubu, zikutanthauza kuti ali yosalala pamwamba kuti ngakhale masks kapena kumathandiza bakiteriya kukula.Pakati pawo, ma hoses amagwiritsidwa ntchito ngati cannulas, catheters, pipettes ndi endoscopes.
5. Makampani opanga zakudya
Chifukwa cha kuyeretsa kwake kosavuta komanso kusakhala ndi ndodo, machubu a PTFE angagwiritsidwe ntchito m'makampani azakudya.Makamaka, machubu opangidwa ndi PTFE osadzazidwa ndi oyenera chifukwa cha kusalowerera ndale komanso kutsatira malangizo a US Food and Drug Administration.Choncho, zatsimikiziridwa zopanda vuto pokhudzana ndi pulasitiki ndi mtundu uliwonse wa chakudya.
Kugula machubu oyenera a PTFE sikuti amangosankha mitundu yosiyanasiyana yamapulogalamu osiyanasiyana.Zambiri kusankha wopanga wodalirika.Besteflon Fluorine plastic Industry Co., Ltd. imakhazikika pakupanga mapaipi apamwamba a PTFE ndi machubu kwa zaka 15.Ngati muli ndi mafunso ndi zosowa, chonde omasuka kutifunsani kuti mudziwe zambiri zamaluso.
Nkhani Zogwirizana nazo
Nthawi yotumiza: Aug-13-2022