Lesela la mocheso o phahameng oa PTFE le sebelisoa haholo e le mohatsela oa motlakase ha ho kenngoe terata, likarolo tsa li-transformer, li-motor windings, le li-circuits tsa maqhubu a phahameng. Empa mocheso o fetoha - ho tloha ho serame se batang ho ea mocheso o feteletseng - o fetola boitšoaro ba eona ba ho itšireletsa. A na u ka itšetleha ka lesela la PTFE ho 200 ° C? Ho etsahala'ng ka holimo ho 260 ° C?
Karabo e rarahane. Sebopeho sa limolek'hule tsa PTFE se e fa tšireletso e ikhethang ho pholletsa le boholo ba mefuta ea eona ea ts'ebetso, empa ho feta 260°C ho baka tšenyeho e ke keng ea etsolloa. 'Me le hoja mocheso o batang o ntlafatsa thepa ea motlakase, o etsa hore seaparo se be bobebe.
Aokai PTFE e lekile thepa ea ho kenya letsoho ho pholletsa le mocheso o feteletseng. Sehlooho sena se arola ts'ebetso ka mekhahlelo e meraro: ts'ebetso e tloaelehileng (-180 ° C ho 260 ° C), e phahameng ka ho fetisisa (> 260 ° C), le mocheso o tlase (<0 ° C), e nang le lintlha tsa bohlokoa mabapi le ho hanyetsa, matla a dielectric, le liphello tse sebetsang.
Mokhoa o Tloaelehileng oa ho sebetsa: -180 ° C ho isa ho 260 ° C - Insulation e tsitsitseng haholo
Ka har'a sebaka sena, lesela la mocheso o phahameng oa PTFE le boloka motlakase o tsoileng matsoho le o tsitsitseng - molemo oa mantlha o tšehetsang ts'ebeliso ea ona ea indasteri.
1. Bolumo & Resistivity Surface
Mocheso
Ho Hanela Bolumo (Ω·cm)
Tlhaloso
Ambient (25°C)
10⊃1;⁷ – 10⊃1;⁸
E ntle haholo - har'a li-insulator tse ntle ka ho fetisisa
200°C
10⊃1;⊃3; -10⊃1;⁴
E ntse e phahametse lisebelisoa tse ngata tse tloaelehileng
260°C
>10⊃1;⊃2; (khakanyo)
E ntse e sebetsa bakeng sa lits'ebetso tse ngata
Mechanism: Resistivity e theoha ka mokhoa o itekanetseng le mocheso o ntseng o phahama hobane mocheso o phahameng o matlafatsa motsamao oa mocheso oa liketane tsa limolek'hule tsa PTFE mme o potlakisa ho falla ha bajari ba litšila. Leha ho le joalo, esita le 200 ° C, PTFE e feta boholo ba lipolasetiki tsa boenjiniere mocheso oa kamore.
Tlhokomeliso mabapi le khanyetso ea bokaholimo: Ho hanyetsa bokaholimo ho bonolo haholo ho mongobo oa tikoloho. PTFE e batla e sa hygroscopic; mongobo o holim'a metsi o fetoha mouoane lithempereichara tse phahameng, 'me o fana ka tšireletso e tsitsitseng ea holim'a metsi ho feta tlas'a maemo a kamoreng ea mongobo o phahameng.
2. Matla a Dielectric (Breakdown Voltage)
E fokotseha ha mocheso o ntse o phahama. Aggravated molecular thermal movement e etsa hore thepa e be kotsing ea ho senyeha ha motlakase.
Ho tloha mocheso oa kamore ho ea ho 200 ° C, matla a nakoana a dielectric a theoha ka hoo e ka bang 20% -40%.
Leha ho le joalo, lesela la premium le pota-potileng 0.1 mm botenya le ntse le mamella li-kilovolts tse 'maloa (kapa mashome a kilovolts bakeng sa limaraka tse teteaneng) ho 200 ° C - matla a ho kenya letsoho a bolokiloe.
3. Dielectric Constant & Dissipation Factor - Ho Fetoha ho Nyenyane
Thepa
Boleng (-100°C ho isa ho 250°C)
Botsitso
Dielectric constant (Dk)
2.0 - 2.1
E batla e bataletse
Dissipation factor (tan δ)
0.0002 - 0.001
Tlase haholo
Hobaneng sena se le bohlokoa: Sebopeho sa limolek'hule tsa PTFE tse ngata tsa symmetric le polarization ea ultra-low polarization e tiisa phetisetso e tsitsitseng ea mats'oao le ho hlahisa mocheso o tlase haholo tlasa ts'ebeletso ea maqhubu a holimo le mocheso o phahameng. Sena se etsa hore PTFE e be sesebelisoa se loketseng sa maqhubu a phahameng a insulate bakeng sa lits'ebetso tsa RF le microwave.
Lesela la Aokai PTFE le nang le mocheso o phahameng oa mocheso le hlalosoa ke bareki bakeng sa mohatsela oa motlakase oa maqhubu a phahameng ka lebaka la botsitso ba Dk (2.05±0.05) le tanδ e tlase haholo (0.0002-0.0005) ho pholletsa le -50°C ho isa ho 200°C. Re fana ka litlaleho tsa tlhahlobo ea thepa ea dielectric ka kopo.
Mocheso o Felletseng o Phahameng oa Mocheso: Ka holimo ho 260 ° C - Ho senyeha ho sa fetoheng
Ho feta PTFE mocheso oa nako e telele o lumelletsoeng oa tšebeletso o baka ho senyeha ho ke keng ha etsolloa ha 'mele le lik'hemik'hale - eseng ho fetoha ha thepa.
Mocheso Range
Boemo ba lintho tse bonahalang
Boemo ba Insulation
260°C – 327°C
PTFE barbotage nolofatsa; matla a mochini a lahlehileng haholo. Khatello ea ka ntle kapa mojaro oa motlakase o baka habonolo ho senyeha ha letlalo le ho phunya → ho hloleha ho kopaneng ha mochini le motlakase le haeba liparamente tsa mantlha tsa motlakase li lula li amoheleha.
E sa tšepahaleng - kotsi ea ho phunya
Ka holimo ho 327°C
E fihla sebakeng sa PTFE's crystalline melting point. PTFE e tiileng e fetoha boemo bo phahameng ba elastic kapa gel, e lahleheloa ke botšepehi ba sebopeho
E batla e hloleha ka ho feletseng
Ka holimo ho 400°C
Ho bola ho matla ha mocheso ho lokolla likhase tse kotsi. Liphaseje tsa carbonization le conductive li theha ka hare ho thepa → molumo oa resistivity o theoha ka bohale, ho senngoa ho feletseng
Ho hloleha ho felletseng - mekhoa ea conductive e theha
Tlhokomeliso ea bohlokoa: Le hoja lesela la fiberglass la motheo le mamella 550-750 ° C pele le nolofala, khalase ea fiberglass e sa koaeloang e monya mongobo habonolo ka mor'a hore PTFE e se ke ea sebetsa 'me e ke ke ea sebetsa ka boithaopo bakeng sa ho kenngoa ha motlakase o phahameng.
Sebaka sa Mocheso o Tlase: Ka tlase ho 0°C - Motlakase o Ntlafetseng empa o Brittle Mechanical
Thepa
Phello e ka Tlase ho 0°C
Phello e Sebetsang
Ho hanyetsa molumo
Keketseho - mocheso o tlase o notlela motsamao oa ketane ea limolek'hule, o sitisa ho falla ha bajari
Ho kenya motlakase ho molemo ho feta mocheso oa kamore
Matla a dielectric
Keketseho - thepa e hanyetsanang le ho senyeha
E ntle bakeng sa lisebelisoa tsa cryogenic insulation
Ho feto-fetoha ha mechine
PTFE e kena phetohong ea karolo ea kristale ho ~ 19 ° C; e fetoha brittle haholo ka tlase ho -79 ° C
Ho kobeha kapa tšusumetso e ka 'na ea senya PTFE e koahelang → e baka mathata a ho kenya letsoho
Ntho ea bohlokoa ea ho nka: Leha ho na le mohatsela o matlafalitsoeng oa motlakase ka mocheso o tlase, PTFE e fetoha e brittle. Bakeng sa lisebelisoa tsa cryogenic (mohlala, lithapo tsa naetrojene tse metsi, li-magnetic magnets), etsa bonnete ba hore lesela ha le be tlas'a khatello e matla kapa khatello ea mochine ka tlase ho -79 ° C. Hang ha e robehile, botšepehi ba ho kenya letsoho bo lahleha ho sa tsotellehe thepa ea motlakase.
Kakaretso - Lula ka hare ho 260 ° C bakeng sa Insulation e Tšepahalang
Mocheso Range
Ts'ebetso ea Insulation
Naha ea Mechini
Keletso
-180°C ho isa ho 260°C
E babatsehang - e tsitsitseng, e phahameng ea resistivity, tahlehelo e tlaase
E feto-fetoha (sheba ho brittleness ka tlase ho -79 ° C)
E bolokehile bakeng sa tšebeliso e tsoelang pele
260°C – 327°C
Ho nyenyefatsa - ho roala ha bonolo ho ka holofatsa/ho phunya
Ho nolofatsa
Ho se tšepahale - qoba ho pepeseha nako e telele
327°C – 400°C
Haufi le ho hloleha - ho qhibiliha, tahlehelo ea sebopeho
Gel/mokelikeli
Ha e sebelisetsoe motlakase
>400°C
Ho hloleha ho sa feleng - carbonization e etsa litsela tsa conductive
E bolileng
Tlokotsi - nka sebaka hang-hang
Ka kakaretso , ka har'a mocheso o tsoelang pele o khothalelitsoeng ho sebetsa (≤260°C), mocheso o baka litlamorao tse mpe tse ke keng tsa etsahala ho PTFE lesela la mocheso o phahameng oa mocheso oa motlakase oa lesela. Ho hanyetsa ha molumo ho lula ka holimo ho 10⊃1;⊃3; Ω · cm ka 200 ° C; dielectric kamehla lula 2.0-2.1; dissipation factor ka tlase ho 0.001. Sena se etsa hore PTFE e be e 'ngoe ea lisebelisoa tse tsitsitseng ka ho fetisisa tsa mocheso o phahameng oa mocheso tse fumanehang - haholo-holo tsa bohlokoa bakeng sa lisebelisoa tse phahameng tsa maqhubu moo li-polymers tse ling li lahleheloang haholo.
Hang ha mocheso o fetelletse ho feta 260 ° C, ho hloleha ha mohatsela ho qala ho tloha ho nolofatsa le ho senyeha ha mochini, ho qetella ho fetoha ho senyeha ho feletseng ha motlakase. Ka holimo ho 400 ° C, carbonization e theha litsela tse sa feleng tsa conductive. Ka tlase ho 0°C, thepa ea motlakase e ea ntlafala, empa bofokoli ba mochini bo beha kotsi ea ho peperana ha lesela.
Na u hloka PTFE lesela la mocheso o phahameng le nang le thepa e tiisitsoeng ea ho kenya letsoho bakeng sa mocheso oa hau oa mocheso? Aokai PTFE e fana ka lintlha tse felletseng tsa tlhahlobo ea dielectric ho tloha ho -70°C ho isa ho 260°C. Ikopanye le rona ka litlhoko tsa hau tsa mocheso oa ts'ebetso, voltage, le khafetsa.
Haeba o hloka lintlha tse ling tsa tekheniki, litharollo tsa ts'ebeliso, le tlhahiso e hlophisitsoeng ea lihlahisoa tse fapaneng ho kenyeletsoa lesela la mocheso o phahameng oa PTFE, tepi ea sekhomaretsi ea PTFE, lebanta la conveyor la PTFE, lebanta la mochini o se nang mochini, lesela le nang le lehlakore le le leng la PTFE le mochini o tsamaisang mocheso o phahameng le lesela la fiberglass , ka kopo ikopanye le rona:
AoKai PTFE ke setsebi
PTFE Coated Fiberglass Fabric Manufacturers le barekisi ba Chaena, ba khethehileng ka ho fana ka
PTFE Adhesive Tape,
PTFE Lebanta la Conveyor,
PTFE Mesh Belt Ho reka kapa ho rekisa lihlahisoa tsa
lesela la fiberglass tse koahetsoeng ka PTFE . Bophara bo bongata, botenya, mebala e fumaneha ka mokhoa o ikhethileng.
