Polytetrafluoroethylene (PTFE) ndi fluoropolymer ya semi-crystalline. PTFE imadziwika bwino chifukwa cha kugwiritsidwa ntchito kwake ngati chophimba chosamata cha miphika ya kukhitchini ndi mapoto chifukwa cha kutentha kwake kwakukulu komanso kukana dzimbiri.
Kodi ndi chiyaniPTFE?
Tiyeni tiyambe kufufuza za PTFE. Kuti tipeze dzina lake lonse, polytetrafluoroethylene ndi polima yopangidwa ndi zinthu ziwiri zosavuta; kaboni ndi fluorine. Imachokera ku tetrafluoroethylene (TFE) ndipo ili ndi zinthu zina zapadera zomwe zimapangitsa kuti ikhale chinthu chothandiza pa ntchito zosiyanasiyana. Mwachitsanzo:
Malo osungunuka kwambiri: Ndi malo osungunuka pafupifupi 327°C, pali zochitika zochepa kwambiri pomwe PTFE ingawonongeke ndi kutentha.
Kusakonda madzi: Kukana kwake madzi kumatanthauza kuti sikunyowa, zomwe zimapangitsa kuti ikhale yothandiza pophika, popaka mabala ndi zina zambiri.
Mankhwala osagwira ntchito: Zosungunulira ndi mankhwala ambiri sizingawononge PTFE.
Kuchuluka kwa kupsinjika kochepa: Kuchuluka kwa kupsinjika kwa PTFE ndi chimodzi mwa zinthu zochepa kwambiri pa zinthu zonse zolimba zomwe zilipo, zomwe zikutanthauza kuti palibe chomwe chingamamatire.
Mphamvu yopindika kwambiri: Kutha kupindika ndi kupindika kwake, ngakhale kutentha kochepa, kumatanthauza kuti ikhoza kugwiritsidwa ntchito mosavuta pamalo osiyanasiyana popanda kutaya umphumphu wake.
Kukonza PTFE
PTFE imapezeka mu ufa wosalala, wogawanika komanso wosalala. PTFE yokhala ndi semi-crystalline imakhala ndi kutentha kwakukulu kosungunuka komanso kukhuthala kosungunuka, zomwe zimapangitsa kuti kutulutsa ndi kuumba jakisoni zikhale zovuta. Chifukwa chake, kukonza PTFE kumafanana kwambiri ndi kukonza ufa kuposa momwe zimakhalira ndi mapulasitiki achikhalidwe.
PTFE ya granular imapangidwa mu njira yopangira polymerisation yochokera m'madzi. Utomoni wa granular womwe umachitika nthawi zambiri umakonzedwa kukhala mawonekedwe kudzera mu compression molding. Zinthu zogawanitsa za PTFE zimapangidwa mwanjira yofanana, ndi zowonjezera zogawanitsa. Zinthu zogawanitsa zitha kugwiritsidwa ntchito popanga PTFE kapena zitha kukonzedwa kukhala filimu yopyapyala pogwiritsa ntchito filimu. Ufa wa PTFE umapangidwa mu emulsion polymerisation reaction. Ufa wosalala womwe umachitika ukhoza kupakidwa mu matepi a PTFE, machubu a PTFE, ndi kutchinjiriza waya, kapena kugwiritsidwa ntchito ngati chowonjezera kuti muwonjezere kukana dzimbiri muzinthu zina za polymeric.
Mapulogalamu 5 Apamwamba a PTFE
1. Kugwiritsa ntchito mphamvu zotsutsana ndi dzimbiri
Rabala, galasi, zitsulo zosungunulira ndi zinthu zina sizikugwirizana ndi kutentha, kupanikizika ndi chilengedwe cha mankhwala chifukwa cha zolakwika zake pakulimbana ndi dzimbiri. Komabe, PTFE ili ndi kukana dzimbiri kwabwino kwambiri ndipo motero yakhala zipangizo zazikulu zolimbana ndi dzimbiri zamafuta, mankhwala, nsalu ndi mafakitale ena.
2. Kugwiritsa ntchito katundu wochepa wa kukangana mu katundu
Kupaka mafuta sikoyenera kupangira zida zina zokangana, chifukwa mafuta opaka amatha kusungunuka ndi zosungunulira ndipo sagwira ntchito, kapena zinthu zomwe zimapezeka m'mafakitale, chakudya, nsalu ndi mafakitale ena ziyenera kupewa kupakidwa utoto ndi mafuta. Chifukwa chake, pulasitiki ya PTFE, yomwe coefficient of friction ndi yotsika kuposa zinthu zina zodziwika bwino zolimba, yakhala chinthu chabwino kwambiri chopaka mafuta opanda mafuta (direct load bearing) pazida zina zamakanika.
3. Kugwiritsa ntchito pa zamagetsi ndi zamagetsi
Kutayika kochepa komanso kusinthasintha pang'ono kwa zinthu za PTFE kumadzipangitsa kuti zipangidwe kukhala waya wolumikizidwa ndi enamel wa ma micro motors, ma thermocouples ndi zida zowongolera. Filimu ya PTFE ndi chinthu choyenera kwambiri chotetezera kutentha popanga ma capacitor, radio insulation liner, ma insulation cables, ma motors ndi ma transformers, komanso ndi chimodzi mwa zinthu zofunika kwambiri pakupanga ndege ndi zida zina zamagetsi zamafakitale.
4. Kugwiritsa ntchito mu mankhwala
PTFE yowonjezereka ndi yopanda mphamvu ndipo imasintha kwambiri momwe imakhalira, kotero siimayambitsa kukanidwa ndi thupi, ilibe zotsatirapo zoyipa pa thupi la munthu, imatha kutsukidwa ndi njira iliyonse, ndipo ili ndi kapangidwe ka ma microporous ambiri.
5. Kugwiritsa ntchito zinthu zotsutsana ndi zomatira
Popeza pamwamba pake pali mphamvu yochepa kwambiri kuposa chinthu chilichonse cholimba, PTFE Teflon simamatira ku chinthu chilichonse. Komanso, imapirira kutentha kwambiri komanso kotsika. Chifukwa cha izi, yagwiritsidwa ntchito kwambiri popanga mapani osamata.
Ngati muli mu Ptfe Tube, Mungakonde
Zotsatirazi ndi chiyambi chachikulu cha makhalidwe akuluakulu a machubu a PTFE:
1. Sili lomatira: Ndi losagwira ntchito, ndipo pafupifupi zinthu zonse sizimalumikizidwa nalo.
2. Kukana kutentha: Ferroflurone ili ndi kukana kutentha kwambiri. Ntchito yonse ingagwiritsidwe ntchito mosalekeza pakati pa 240℃ ndi 260℃. Kukana kutentha kwa nthawi yochepa kufika 300℃ ndi malo osungunuka a 327℃.
3. Mafuta: PTFE ili ndi coefficient yotsika ya friction. Coefficient ya friction imasintha pamene katundu akuyenda, koma mtengo wake ndi pakati pa 0.04 ndi 0.15 yokha.
4. Kukana nyengo: palibe ukalamba, ndipo pulasitiki siidzakalamba bwino.
5. Yopanda poizoni: Pamalo abwinobwino mkati mwa 260℃, imakhala ndi vuto la thupi ndipo ingagwiritsidwe ntchito ngati zida zamankhwala ndi chakudya.
Kugula chubu choyenera cha PTFE sikuti kungosankha zinthu zosiyanasiyana pa ntchito zosiyanasiyana. Pali zambiri zoti musankhe wopanga wodalirika.Besteflon FluorineKampani ya pulasitiki ya Industry Co., Ltd. imapanga zinthu zapamwamba kwambiriMapayipi ndi machubu a PTFEkwa zaka 20. Ngati muli ndi mafunso ndi zosowa, chonde musazengereze kutifunsa kuti mupeze upangiri waukadaulo wowonjezereka.
Nkhani Zofanana
Nthawi yotumizira: Marichi-15-2024