Kodi chubu cha ptfe chimapangidwa ndi zinthu ziti?
Chiyambi cha malonda
1,Chitoliro cha Ptfendi dzina lina la polytetrafluoroethylene, chidule cha Chingerezi ndi PTFE, (chomwe chimadziwika kuti "Plastic King, Hara"), ndipo njira ya mankhwala ndi -(CF2-CF2)n-. Polytetrafluoroethylene inapezeka mwangozi mu 1938 ndi katswiri wa zamankhwala Dr. Roy J. Plunkett ku DuPont.'s Jackson Laboratory ku New Jersey, USA Pamene anayesa kupanga chlorofluorocarbon yatsopano Pankhani ya refrigerant yosakanikirana. Zopangidwa ndi zinthuzi nthawi zambiri zimatchedwa "chophimba chosamata"; ndi chinthu chopangidwa ndi polima chomwe chimagwiritsa ntchito fluorine m'malo mwa maatomu onse a haidrojeni mu polyethylene. Zinthuzi zimalimbana ndi ma acid, alkali, ndi zinthu zosiyanasiyana zachilengedwe, ndipo sizisungunuka kwambiri mu zosungunulira zonse. Nthawi yomweyo, PTFE ili ndi mawonekedwe a kukana kutentha kwambiri, ndipo coefficient yake yokangana ndi yotsika kwambiri, kotero ingagwiritsidwe ntchito ngati njira yopaka mafuta, ndipo yakhalanso chophimba chabwino kwambiri cha mkati mwa miphika yosamata ndi mapaipi amadzi.
Zipangizo za mankhwalawa zimagwiritsidwa ntchito kwambiri pazinthu zotsatirazi:
PTFE, FEP, PFA, ETFE, AF, NXT, FFR.
PTFE: Chophimba cha PTFE (polytetrafluoroethylene) chosamamatira chingagwiritsidwe ntchito mosalekeza pa 260°C, ndi kutentha kwakukulu kogwiritsidwa ntchito kwa 290-300°C, kukwanira kochepa kwambiri kwa kukangana, kukana bwino kutopa komanso kukhazikika bwino kwa mankhwala.
FEP: FEP (fluorinated ethylene propylene copolymer) yophimba yosamamatira imasungunuka ndikuyenda kuti ipange filimu yopanda mabowo panthawi yophika. Ili ndi kukhazikika kwabwino kwa mankhwala komanso mawonekedwe abwino osamamatira. Kutentha kwakukulu kogwiritsidwa ntchito ndi 200℃.
PFA: PFA (perfluoroalkyl compound) yophimba yosamamatira imasungunuka ndikuyenda ikaphikidwa kuti ipange filimu yopanda mabowo ngati FEP. Ubwino wa PFA ndikuti imakhala ndi kutentha kopitilira 260°C, ndi yolimba komanso yolimba kwambiri, ndipo ndi yoyenera kugwiritsidwa ntchito polimbana ndi kuuma komanso kukana mankhwala m'malo otentha kwambiri.
PTFE (Polytetrafluoroethene) ndi chinthu chopangidwa ndi polima chomwe chimagwiritsa ntchito fluorine m'malo mwa maatomu onse a haidrojeni mu polyethylene. Chinthuchi chimalimbana ndi ma acid, alkali, ndi zinthu zosiyanasiyana zachilengedwe, ndipo sichisungunuka m'zinthu zonse zosungunulira. Nthawi yomweyo, chubu cha ptfe chili ndi mawonekedwe otsutsana ndi kutentha kwambiri, ndipo kuchuluka kwake kokangana ndi kochepa kwambiri, kotero chingagwiritsidwe ntchito popaka mafuta, ndipo chakhalanso chophimba chabwino kwambiri cha mapaipi osavuta kuyeretsa a woks ndi madzi. Chingagwiritsidwe ntchito pokana dzimbiri pa mapaipi, kukana kutentha kwambiri komanso kochepa, komanso kukana dzimbiri. Chimagwiritsidwa ntchito m'malo ovuta monga mafuta, uinjiniya, zamagetsi, zida zamagetsi, ndi ndege.
Zinthu zomwe zili mu malonda
1, Kukana kutentha kwakukulu ndi kotsika: kukhudza pang'ono kutentha, kutentha kwakukulu, kutentha koyenera -65 ~ 260℃.
2、 Yosamata: Pafupifupi zinthu zonse sizimalumikizidwa ku filimu ya PTFE. Mafilimu owonda kwambiri amawonetsanso magwiridwe antchito abwino osasokoneza. 2. Kukana kutentha: Filimu yophimba ya PTFE ili ndi kukana kutentha kwambiri komanso kukana kutentha kochepa. Imatha kupirira kutentha kwambiri mpaka 300°C pakapita nthawi yochepa, ndipo nthawi zambiri ingagwiritsidwe ntchito mosalekeza pakati pa 240°C ndi 260°C. Ili ndi kukhazikika kwakukulu kwa kutentha. Imatha kugwira ntchito kutentha kozizira popanda kuphulika ndipo siisungunuka kutentha kwambiri.
3、Kapangidwe kotsetsereka: Filimu yokutira ya PTFE ili ndi coefficient yapamwamba kwambiri ya kukangana. Coefficient ya kukangana imasintha pamene katundu ukutsetsereka, koma mtengo wake ndi pakati pa 0.05-0.15 yokha.
4、Kukana chinyezi: Pamwamba pa filimu yophimba ya PTFE simamatira ku madzi ndi mafuta, ndipo sikophweka kumamatira ku yankho panthawi yopanga. Ngati pali dothi laling'ono, ingopukutani. Kuwononga nthawi yochepa, kusunga maola ogwira ntchito ndikuwonjezera magwiridwe antchito.
5、Kukana kuvala: Kukana kuvala bwino kwambiri mukanyamula katundu wambiri. Mukanyamula katundu winawake, kuli ndi ubwino wowirikiza wa kukana kuvala komanso kusasokoneza.
6、Kukana dzimbiri: PTFE siingawonongeke ndi mankhwala, ndipo imatha kupirira ma asidi onse amphamvu (kuphatikiza aqua regia) ndi ma oxidant amphamvu kupatula zitsulo zosungunuka za alkali, fluorinated media ndi sodium hydroxide pamwamba pa 300°C. Ntchito ya chochepetsera ndi zosungunulira zosiyanasiyana zachilengedwe zimatha kuteteza ziwalo ku dzimbiri la mankhwala aliwonse.
katundu wa mankhwala
1、Kuteteza: Sikukhudzidwa ndi chilengedwe ndi mafupipafupi, kukana kwa voliyumu kumatha kufika 1018 ohm·cm, kutayika kwa dielectric ndi kochepa, ndipo voliyumu yosweka ndi yayikulu.
2、Kukana kutentha kwambiri komanso kotsika: kutentha pang'ono, kutentha kwakukulu, kutentha koyenera -190~260℃.
3、Kudzipaka mafuta: Kuli ndi mphamvu yochepa kwambiri pakati pa mapulasitiki ndipo ndi chinthu chabwino kwambiri chopaka mafuta chopanda mafuta.
4, pamwamba sipamata: zinthu zolimba zodziwika sizingamamatire pamwamba, ndi zinthu zolimba zomwe zili ndi mphamvu zochepa kwambiri pamwamba.
5、Kukana kwa nyengo, kukana kwa kuwala kwa dzuwa ndi kutsika kwa mpweya: kuwonetsedwa kwa nthawi yayitali mumlengalenga, pamwamba ndi magwiridwe antchito sizisintha.
6、Kusayaka: Chizindikiro cha mpweya wochepa chili pansi pa 90.
7、PTFE imagwiritsidwa ntchito kwambiri m'mafakitale omwe amafuna kukana kutentha kwambiri komanso kukhuthala kwakukulu. Super acid-fluoroantimonic acid yamphamvu kwambiri ingagwiritsidwenso ntchito posunga
Malo ogwiritsira ntchito mankhwala
Polytetrafluoroethylene imatha kupangidwa poikankhira kapena kutulutsa; imathanso kupangidwa kukhala filimu kenako nkudulidwa mu tepi ya PTFE yoyikidwa mu shaft ikagwiritsidwa ntchito mu mawaya otentha kwambiri. Imagwiritsidwa ntchito popanga mawaya amphamvu kwambiri ndikupangidwa mwachindunji kuti ifalikire m'madzi. Itha kugwiritsidwa ntchito popaka utoto, kuyikamo kapena kupanga ulusi.
Polytetrafluoroethylene imagwiritsidwa ntchito kwambiri m'mafakitale monga mphamvu ya nyukiliya, chitetezo cha dziko, ndege, zamagetsi, zamagetsi, mankhwala, makina, zida, zoyezera, zomangamanga, nsalu, chithandizo cha pamwamba pa zitsulo, mankhwala, chisamaliro chamankhwala, chakudya, zitsulo ndi kusungunula, ndi zina zotero. Zipangizo zowononga, zipangizo zotetezera kutentha, zokutira zotsutsana ndi ndodo, ndi zina zotero zimapangitsa kuti ikhale chinthu chosasinthika.
payipi ya PTFEIli ndi zinthu zabwino kwambiri zophatikizika, kukana kutentha kwambiri, kukana dzimbiri, kusamamatira, kudzipaka mafuta, kukana dielectric yabwino kwambiri, komanso kukana kupsinjika kochepa kwambiri. Imagwiritsidwa ntchito ngati pulasitiki yaukadaulo, imatha kupangidwa kukhala machubu a PTFE, ndodo, malamba, mbale, mafilimu, ndi zina zotero. Nthawi zambiri imagwiritsidwa ntchito m'mapaipi osagonjetsedwa ndi dzimbiri, zotengera, mapampu, ma valve, radar, zida zolumikizirana zamafupipafupi, zida za wailesi, ma radomes, ndi zina zotero zomwe zimakhala ndi zofunikira kwambiri. Powonjezera chodzaza chilichonse chomwe chingapirire kutentha kwa polytetrafluoroethylene, zinthu zake zamakaniko zitha kukonzedwa bwino. Nthawi yomweyo, zinthu zina zabwino kwambiri za PTFE zimasungidwa. Mitundu yodzazidwa imaphatikizapo ulusi wagalasi, chitsulo, oxide yachitsulo, graphite, molybdenum disulfide, ulusi wa kaboni, polyimide, EKONOL, ndi zina zotero. Kukana kutopa ndi malire a PV kumatha kuwonjezeka ndi nthawi 1000
Kusaka kokhudzana ndi payipi ya ptfe:
Nthawi yotumizira: Januwale-07-2021