Yeyiphi into eyenziwa ityhubhu yeptfe?
Intshayelelo yemveliso
1,Ptfe ityhubhulelinye igama le-polytetrafluoroethylene, isishunqulelo sesiNgesi sithi PTFE, (esaziwa njenge "Plastic King, Hara"), kunye nefomula yemichiza ngu -(CF2-CF2)n-.I-Polytetrafluoroethylene yafunyanwa ngengozi kwi-1938 yikhemisti uGqr. Roy J. Plunkett eDuPont.'s Jackson Laboratory in New Jersey, USA Xa wayezama ukwenza iklorofluorocarbon entsha Kwimeko yefriji edibeneyo.Iimveliso zesi sixhobo zibizwa ngokuba yi "non-sticing coating";yimathiriyeli yokwenziwa yepolymer esebenzisa ifluorine ukubuyisela zonke iiathom zehydrogen kwipolyethylene.Esi sixhobo siyaxhathisa kwiiasidi, iialkali, kunye nezinyibilikisi ezahlukeneyo zezinto eziphilayo, kwaye phantse azinyibiliki kuzo zonke izinyibilikisi.Kwangaxeshanye, i-PTFE ineempawu zokunganyangeki kobushushu obuphezulu, kwaye i-friction coefficient iphantsi kakhulu, ngoko ingasetyenziswa njengendlela yokuthambisa, kwaye iye yaba yinto efanelekileyo yokwaleka kwileya yangaphakathi yeembiza ezinganamatheli. kunye nemibhobho yamanzi
Ezi mveliso zisetyenziswa ikakhulu kwezi mveliso zilandelayo:
PTFE, FEP, PFA, ETFE, AF, NXT, FFR.
I-PTFE: I-PTFE (i-polytetrafluoroethylene) i-non-stick coating ingasetyenziswa ngokuqhubekayo kwi-260°C, kunye nobushushu bokusetyenziswa okuphezulu kwe-290-300°C, i-coefficient ye-friction ephantsi kakhulu, ukunganyangeki kakuhle kunye nokuzinza okugqwesileyo kweekhemikhali.
I-FEP: I-FEP (i-ethylene propylene copolymer ene-fluorinated) i-copolymer engekho intonga iyanyibilika kwaye igeleze yenze ifilimu engenazimbobo ngexesha lokubhaka.Inozinzo olugqwesileyo lweekhemikhali kunye neempawu ezigqwesileyo ezingabambekiyo.Ubushushu bokusetyenziswa okuphezulu yi-200℃.
PFA: I-PFA (ikhompawundi ye-perfluoroalkyl) i-condition ye-non-stick iyanyibilika kwaye ihamba ngexesha lokubhaka ukwenza ifilimu engeyiyo i-porous efana ne-FEP.Inzuzo yePFA kukuba inobushushu obuphezulu bokusebenzisa obuqhubekayo be-260°C, ukuqina okunamandla kunye nokuqina, kwaye ifaneleke ngokukodwa ukusetyenziswa kwi-anti-sticking kunye nezicelo zokumelana nemichiza phantsi kweemeko eziphezulu zokushisa.
I-PTFE (i-Polytetrafluoroethene) yimathiriyeli yokwenziwa yepolymer esebenzisa iflourine ukubuyisela zonke iiathom ze-hydrogen kwi-polyethylene.Esi sixhobo siyaxhathisa kwiiasidi, iialkali, kunye nezinyibilikisi ezahlukeneyo zezinto eziphilayo, kwaye phantse azinyibiliki kuzo zonke izinyibilikisi.Kwangaxeshanye, ityhubhu ye-ptfe ineempawu zokuxhathisa ubushushu obuphezulu, kwaye i-friction coefficient yayo iphantsi kakhulu, ngoko ingasetyenziselwa ukuthambisa, kwaye iye yaba yinto efanelekileyo yokwaleka kwii-woks ezilula ukucoca kunye nemibhobho yamanzi.Ingasetyenziselwa ukuxhathisa kwimibhobho ye-corrosion, ukumelana nobushushu obuphezulu kunye nokuphantsi, kunye nokuxhathisa ukubola.Isetyenziswa kwiimeko ezinzima ezifana nokuthambisa, ubunjineli, umbane, izixhobo zombane, kunye nenqwelomoya.
Iimpawu zemveliso
1, Ukumelana nobushushu obuphezulu kunye obuphantsi: isiphumo esincinci kwiqondo lobushushu, uluhlu olubanzi lobushushu, ubushushu obusebenzayo -65 ~ 260 ℃.
I-2, I-Non-sticky: Phantse zonke izinto azibotshwanga kwifilimu ye-PTFE.Iifilimu ezincinci kakhulu zikwabonisa ukusebenza kakuhle okungaphazamisiyo.2. Ukumelana nobushushu: ifilimu yokugquma i-PTFE inokumelana nobushushu obugqwesileyo kunye nokumelana nobushushu obuphantsi.Iyakwazi ukumelana nobushushu obuphezulu ukuya kuma-300°C ngexeshana elifutshane, kwaye ngokubanzi ingasetyenziswa ngokuqhubekayo phakathi kwe-240°C kunye ne-260°C.Inozinzo olubalulekileyo lwe-thermal.Ingasebenza kumaqondo obushushu abandayo ngaphandle kokugquma kwaye ayinyibiliki kumaqondo obushushu aphezulu.
3, Ipropathi yokutyibilika: ifilimu yokugquma ye-PTFE ine-coefficient ephezulu yokukhuhlana.I-coefficient ye-friction iyatshintsha xa umthwalo uhambisa, kodwa ixabiso liphakathi kwe-0.05-0.15 kuphela.
I-4, ukuxhathisa ukufuma: Umphezulu wefilimu yokugqoka ye-PTFE ayinamathele emanzini kunye neoli, kwaye akulula ukunamathela kwisisombululo ngexesha lemisebenzi yokuvelisa.Ukuba kukho ukungcola okuncinci, yisule ngokulula.Ixesha elifutshane elichithwe, ukonga iiyure zokusebenza kunye nokuphucula ukusebenza kakuhle.
5, Ukumelana nokunxiba: Inokumelana nokunxiba okugqwesileyo phantsi komthwalo omkhulu.Ngaphantsi komthwalo othile, uneenzuzo ezimbini zokuxhatshazwa kokugqoka kunye nokungaphazamisi.
I-6, Ukumelana nokubola: I-PTFE ayinakugqwala ngamachiza, kwaye inokumelana nazo zonke ii-asidi ezomeleleyo (kubandakanya i-aqua regia) kunye ne-oxidants ezomeleleyo ngaphandle kweentsimbi ezinyibilikisiweyo zealkali, imidiya ene-fluorinated kunye ne-sodium hydroxide ngaphezu kwe-300 ° C.Indima yokunciphisa i-agent kunye neentlobo ezahlukeneyo ze-solvents eziphilayo zinokukhusela iinxalenye kulo naluphi na uhlobo lokubola kweekhemikhali
ipropati yeekhemikhali
I-1, i-Insulation: Ayichatshazelwa kukusingqongileyo kunye nokuphindaphinda, ukuxhathisa umthamo kunokufikelela kwi-1018 ohm · cm, ilahleko ye-dielectric incinci, kwaye i-voltage yokuqhawula iphezulu.
2 、 Ukumelana nobushushu obuphezulu kunye obuphantsi: isiphumo esincinci kwiqondo lobushushu, uluhlu olubanzi lobushushu, ubushushu obusebenzayo -190 ~ 260 ℃.
3, Ukuzithambisa: Ineyona coefficient incinci yokukhuhlana phakathi kweeplastiki kwaye yeyona nto ifanelekileyo yokuthambisa ioyile.
I-4, Ukungabambeki komphezulu: izixhobo eziqinileyo ezaziwayo azikwazi ukubambelela kumphezulu, yinto eyomeleleyo kunye neyona ndawo incinci yamandla.
I-5, ukuxhathisa imozulu, ukuxhathisa ngemitha kunye nokungena okuphantsi: ukubonakaliswa kwexesha elide emoyeni, umphezulu kunye nokusebenza kuhlala kungatshintshi.
6, Ukungatshi: Isalathisi somda we-oxygen singaphantsi kwe-90.
I-7, i-PTFE isetyenziswa ngokubanzi kumashishini afuna ukumelana nobushushu obuphezulu kunye ne-viscosity ephezulu.Eyona acid eyomeleleyo super acid-fluoroantimonic ingasetyenziselwa ukugcinwa
Indawo yesicelo semveliso
I-Polytetrafluoroethylene inokubunjwa ngokutyhala okanye ukukhupha;ingenziwa kwakhona ifilimu kwaye emva koko isikwe kwiteyiphu ye-PTFE efakwe kwi-shaft xa isetyenziswe kwiingcingo zobushushu obuphezulu.Isetyenziselwa ukuvelisa iintambo eziphezulu ze-frequency kwaye zenziwe ngokuthe ngqo kukusasazwa kwamanzi.Ingasetyenziselwa ukugquma, ukufakwa ngaphakathi okanye ukwenza ifayibha.
I-Polytetrafluoroethylene isetyenziswa kakhulu kumashishini anjengamandla enyukliya, ukhuselo lwesizwe, i-aerospace, i-electronics, umbane, iikhemikhali, oomatshini, izixhobo, iimitha, ulwakhiwo, amalaphu, unyango lomphezulu wesinyithi, amayeza, unyango, ukutya, isinyithi kunye nokunyibilikisa, njl njl. imathiriyeli, izinto zokugquma, izinto zokwaleka ezichasayo, njl.njl. zenza imveliso engenakubuyiselwa.
Umbhobho we-PTFEineepropathi ezigqwesileyo ezigqwesileyo, ukumelana nobushushu obuphezulu, ukumelana nokugqwala, ukunganamatheli, ukuzithambisa, iipropathi ezigqwesileyo zedielectric, kunye ne-coefficient ephantsi kakhulu yokukhuhlana.Isetyenziswa njengeeplastiki zobunjineli, inokwenziwa kwiityhubhu ze-PTFE, iintonga, amabhanti, iipleyiti, iifilim, njl njl. Ngokuqhelekileyo zisetyenziswa kwimibhobho enganyangekiyo kwi-corrosion, izitya, iimpompo, iivalvu, irada, izixhobo zonxibelelwano ezikwi-high-frequency, izixhobo zerediyo, iiradomes, njl.neemfuno zokusebenza eziphezulu.Ukongeza nayiphi na into yokuzalisa enokumelana nokushisa kwe-sintering ye-polytetrafluoroethylene, iimpawu zayo zomatshini zingaphuculwa kakhulu.Ngaxeshanye, ezinye iipropathi ezigqwesileyo ze-PTFE ziyagcinwa.Iindidi ezizaliswe zibandakanya ifayibha yeglasi, isinyithi, i-oxide yensimbi, igraphite, i-molybdenum disulfide, i-carbon fiber, i-polyimide, i-EKONOL, njl.
Uphendlo olunxulumene nethumbu le-ptfe:
Ixesha lokuposa: Jan-07-2021