Thepa ea PTFE ea mechine e tlase ha e bapisoa le lipolasetiki tse ling, 'me e ka sebelisoa ho feta mocheso o pharaletseng oa -100 ° F ho + 400 ° F (-73 ° C ho 204 ° C).).E na le thepa e ntle ea ho kenya mocheso le motlakase le coefficient e tlase ea likhohlano.PTFE e teteaneng haholo mme e ke ke ya sebetswa ka ho qhibidiha.PTFE e tlameha ho hatelloa le ho hatelloa ho etsa libopeho tse molemo.
Leqephe la PTFE, Molamu, & Tube- Thermal botsitso PTFE ke e 'ngoe ea lisebelisoa tsa polasetiki tse tsitsitseng ka ho fetisisa.Ha ho na decompositions appreciable at 260 ° C, e le hore PTFE, mocheso ona, e ntse e e-na le boholo ba thepa ea eona.Ho bola ho ratehang ho qala ka holimo ho 400°C.Lintlha tsa phetoho ea PTFE-Geometry ea limolek'hule tsa PTFE (sebopeho sa kristale) se fapana le mocheso.Ho na le lintlha tse fapaneng tsa phetoho, tse bohlokoa ka ho fetisisa ke tse latelang: hore ho 19 ° C e lumellanang le ho fetoloa ha thepa e 'ngoe ea' mele le hore ho 327 ° C e lumellanang le ho nyamela ha sebopeho sa kristale: PTFE e nka karolo ea amorphous. ho boloka sebopeho sa eona sa geometri.Katoloso ea PTFE- The linear thermal katoloso coefficient fapana le mocheso.Ho phaella moo, ka lebaka la mokhoa o bakoang ke mokhoa oa ho sebetsa, likotoana tsa PTFE hangata li na le anisotropic;ka mantsoe a mang, coefficient ea katoloso e fapana hape mabapi le tataiso.PTFE Thermal conductivity-The coefficient ea mocheso conductivity ea PTFE ha e fapane le mocheso.E batla e phahame, e le hore PTFE e ka nkoa e le thepa e ntle ea insulating.Ho kopanngoa ha li-fillers tse loketseng ho ntlafatsa tsamaiso ea mocheso (sheba PTFE e tletseng).PTFE Mocheso o khethehileng-Mocheso o khethehileng, hammoho le mocheso oa mocheso (enthalpy) o eketseha ka mocheso.PTFE Boitšoaro boteng ba baemeli ba kantle ho nahaPTFE Ho hanyetsa lik'hemik'hale-PTFE e batla e sa sebetse khahlanong le likarolo tse tsebahalang le metsoako.E hlaseloa feela ke litšepe tsa alkaline sebakeng sa mathomo, ke Chlorine trifluoride le Fluorine ea motheo ka mocheso o phahameng le likhatello.PTFE Solvent resistance-PTFE ha e qhibilihe hoo e batlang e le lihlahisoa tsohle tsa mocheso ho fihlela ho 300°C.Li-hydrocarbon tse nang le fluorinated li baka ho ruruha ho itseng hoo leha ho le joalo ho ka khutlisoa;Lioli tse ling tse nang le fluorinated haholo, mocheso o fetang 300 ° C, li sebelisa phello e itseng ea ho qhibiliha holim'a PTFE.PTFE Ho hanyetsa mahlahana a sepakapaka le leseli-Likaroloana tsa liteko tsa PTFE, tse pepesehileng ka lilemo tse fetang mashome a mabeli ho maemo a leholimo a sa tšoaneng ka ho fetisisa, ha lia ka tsa bontša phetoho leha e le efe ea litšobotsi tsa bona.PTFE Ho hanyetsa mahlaseli-Mahlaseli a matla a phahameng a atisa ho baka ho robeha ha molek'hule ea PTFE, e le hore ho hanyetsa sehlahisoa ho mahlaseli a kotsi ho e-na le ho futsaneha.PTFE Ho kenella ha khase-The permeability ea PTFE e tšoana le lisebelisoa tse ling tsa polasetiki.The permeability ha e itšetlehe, ho hlakile, feela ka botenya le khatello, empa hape le ka mekhoa ea ho sebetsa.'Mele - thepa ea mechineThepa e tsitsitseng le e hatellang Thepa ena e susumetsoa haholo ke mekhoa ea ho sebetsa le phofo e hiriloeng.PTFE, leha ho le joalo, e ka sebelisoa khafetsa mochesong o fihlang ho 260 ° C, ha e ntse e e-na le polasetiki e 'ngoe e hatellang mocheso o haufi le Zero e felletseng.PTFE tenyetseha-PTFE e feto-fetoha haholo 'me ha e robehe ha e tlas'a khatello ea 0,7 N / mm2 ho latela ASTM D 790. Flexural modulus e ka bang 350 ho 650 N / mm2 mocheso oa kamore, hoo e ka bang 2000 N / mm2 ho -80 ° C. , hoo e ka bang 200 N/mm2 ho 100°C le hoo e ka bang 45 N/mm2 ho 260°C.Lintho tse amang-PTFE e na le litšoaneleho tse phahameng haholo tsa mamello hape ka mocheso o tlase.Mohopolo oa polasetiki-Haeba sengoathoana sa PTFE se tlas'a khatello ea khatello kapa khatello ea khatello ka tlase ho ntlha ea lihlahisoa, karolo ea li-deformations tse hlahisoang li sala (e le li-deformations tse sa feleng) ka mor'a ho khaotsa ho imeloa kelellong, ka lebaka la hore mefuta e itseng e kenngoa karolong eo.Haeba sengoathoana se tsosolosoa, mefuta ena e atisa ho itokolla ka har'a sengoathoana se tsosolosang sebopeho sa sona sa pele.Thepa ena ea PTFE e atisa ho bontšoa e le "memori ea polasetiki" 'me e sebelisoa lits'ebetsong tse fapaneng.Hape lihlahisoa tse ngata tse felileng, ka lebaka la ts'ebetso ea phetoho, li na le mathata a tšoanang, ho isa tekanyong e itseng.Ha ho lakatsoa ho fumana likarolo tse felileng ka mokhoa o tsitsitseng mochesong o phahameng, hoa khoneha ho beha likarolo tlas'a mocheso oa 280 ° C ka hora e 'ngoe le e' ngoe ea 6 mm ea botenya ebe o li pholisa butle.Likarolo tse fumanoeng ka mokhoa ona li batla li lokolohile ka botlalo ho tsoa mefuteng ea kahare mme ka kakaretso li tsejoa e le "conditioned" kapa "thermostabilised" material.Ho thatafala-Bothata ba Shore D, bo lekantsoeng ho latela mokhoa oa ASTM D 2240, bo na le litekanyetso tse pakeng tsa D50 le D60.Ho ea ka DIN 53456 (mojaro 13,5 Kg bakeng sa 30 sec) ho thatafala hoa sisinyeha pakeng tsa 27 le 32 N / mm2.Khohlano-PTFE e na le li-coefficients tse tlase tsa likhohlano tsa lisebelisoa tsohle tse tiileng;pakeng tsa 0.05 le 0.09:* static le dynamic friction coefficients li batla li lekana, e le hore ho se be le ts'ebetso ea ho ts'oaroa kapa ho thella.* ha o eketsa mojaro, coefficient ea likhohlano e fokotseha ho fihlela e fihla boleng bo tsitsitseng* Coefficient ea likhohlano e eketseha ka lebelo* coefficient ea likhohlano e lula e sa fetohe ho fapana ha mocheso.Apara-Ho apara ho itšetlehile ka boemo ba sebaka se seng se thellang 'me ho hlakile hore ho itšetlehile ka lebelo le meroalo.Moaparo o fokotsehile haholo ha o kenyelletsa li-filler tse loketseng ho PTFE (sheba PTFE e tlatsitsoeng).Thepa ea motlakasePTFE Insulation-PTFE ke insulator e ntle haholo le dielectric ea bohlokoa joalo ka ha ho bonts'itsoe ke data e amanang e tlalehiloeng ka har'a database mme e boloka litšobotsi tsena maemong a mangata a tikoloho, mocheso le maqhubu.Matla a dielectric-Matla a dielectric a PTFE a fapana le botenya mme a fokotseha ka makhetlo a ntseng a eketseha.E lula e sa fetohe ho fihlela ho 300 ° C 'me ha e fapane le ka mor'a phekolo ea nako e telele mocheso o phahameng (likhoeli tse 6 ho 300 ° C).E boetse e itšetlehile ka mekhoa ea phetoho.Dielectric constant and dissipation factor -PTFE e na le maemo a tlase haholo a dielectric kamehla le a dissipation factor values;tsena li lula li sa fetohe ho fihlela 300 ° C, tšimong ea makhetlo a ho fihlela ho 109 Hz esita le ka mor'a phekolo ea nako e telele ea mocheso (likhoeli tse 6 ho 300 ° C).Ntho e sa fetoheng ea dielectric, dissipation factor hammoho le resistivity ea molumo le ho hanyetsa holimo, ho nkoa e le ho ikemela ho tsoa lits'ebetsong tsa phetoho.Arc-ho hanyetsa-PTFE e na le khanyetso e ntle ho arc.Nako ea ho hanyetsa arc ho latela ASTM D 495 ke metsotsoana e 700.Ka mor'a ketso ea nako e telele ha ho na matšoao a ho charing holimo.Corona effect resistance-The discharges bakoang ke phello ea corona e ka 'na ea fella ka khoholeho ea holim'a PTFE eo, leha ho le joalo, e bontšoang e le insulator e loketseng tabeng ea phapang e phahameng.Thepa ea bokaholimoPhetoho ea limolek'hule ea PTFE e tlisa holim'a eona ho ba le bohanyetsi bo phahameng ba ho khomarela.Ka lebaka le tšoanang, libaka tsena ha li na metsi, sebaka sa ho kopana le metsi se ka bang 110 ° 'me ho ka khoneha ho tiisa hore, ho feta tsitsipano ea holim'a 20 dine / cm, mokelikeli ha o sa kolobisa PTFE.Kalafo e khethehileng ea etching e etsa hore bokaholimo bo kopane 'me bo be metsi.
Nako ea poso: Jun-17-2020